CN114195167B - Sodium-based oxygen generation molecular sieve and preparation method thereof - Google Patents
Sodium-based oxygen generation molecular sieve and preparation method thereof Download PDFInfo
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- CN114195167B CN114195167B CN202111567492.9A CN202111567492A CN114195167B CN 114195167 B CN114195167 B CN 114195167B CN 202111567492 A CN202111567492 A CN 202111567492A CN 114195167 B CN114195167 B CN 114195167B
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- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 title claims abstract description 84
- 239000002808 molecular sieve Substances 0.000 title claims abstract description 83
- 229910052708 sodium Inorganic materials 0.000 title claims abstract description 75
- 239000011734 sodium Substances 0.000 title claims abstract description 75
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 title claims abstract description 51
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 45
- 239000001301 oxygen Substances 0.000 title claims abstract description 45
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 45
- 238000002360 preparation method Methods 0.000 title claims abstract description 18
- 238000006243 chemical reaction Methods 0.000 claims abstract description 55
- 239000000843 powder Substances 0.000 claims abstract description 52
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 46
- 238000002425 crystallisation Methods 0.000 claims abstract description 31
- 230000008025 crystallization Effects 0.000 claims abstract description 31
- 229910000838 Al alloy Inorganic materials 0.000 claims abstract description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 26
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical group [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 claims abstract description 24
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 23
- 230000032683 aging Effects 0.000 claims abstract description 22
- 239000011230 binding agent Substances 0.000 claims abstract description 17
- 239000000203 mixture Substances 0.000 claims abstract description 17
- 239000001996 bearing alloy Substances 0.000 claims abstract description 16
- 235000012239 silicon dioxide Nutrition 0.000 claims abstract description 13
- 239000007921 spray Substances 0.000 claims abstract description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 43
- 238000001179 sorption measurement Methods 0.000 claims description 43
- 239000001257 hydrogen Substances 0.000 claims description 42
- 229910052739 hydrogen Inorganic materials 0.000 claims description 42
- 238000004321 preservation Methods 0.000 claims description 33
- 150000002431 hydrogen Chemical class 0.000 claims description 30
- 238000002485 combustion reaction Methods 0.000 claims description 27
- 239000007789 gas Substances 0.000 claims description 25
- 230000007246 mechanism Effects 0.000 claims description 24
- 238000010438 heat treatment Methods 0.000 claims description 21
- 229910052757 nitrogen Inorganic materials 0.000 claims description 21
- 238000000034 method Methods 0.000 claims description 17
- 239000012295 chemical reaction liquid Substances 0.000 claims description 13
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 12
- 238000002156 mixing Methods 0.000 claims description 12
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 11
- 238000000926 separation method Methods 0.000 claims description 11
- 229910045601 alloy Inorganic materials 0.000 claims description 10
- 239000000956 alloy Substances 0.000 claims description 10
- 229910052782 aluminium Inorganic materials 0.000 claims description 10
- 239000006185 dispersion Substances 0.000 claims description 9
- 239000007788 liquid Substances 0.000 claims description 9
- 238000004519 manufacturing process Methods 0.000 claims description 8
- 229920000663 Hydroxyethyl cellulose Polymers 0.000 claims description 7
- 239000004354 Hydroxyethyl cellulose Substances 0.000 claims description 7
- 229920002472 Starch Polymers 0.000 claims description 7
- 238000001914 filtration Methods 0.000 claims description 7
- 235000019447 hydroxyethyl cellulose Nutrition 0.000 claims description 7
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 claims description 7
- 239000008107 starch Substances 0.000 claims description 7
- 235000019698 starch Nutrition 0.000 claims description 7
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 5
- YFVGRULMIQXYNE-UHFFFAOYSA-M lithium;dodecyl sulfate Chemical compound [Li+].CCCCCCCCCCCCOS([O-])(=O)=O YFVGRULMIQXYNE-UHFFFAOYSA-M 0.000 claims description 5
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical group [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 claims description 4
- 238000001704 evaporation Methods 0.000 claims description 4
- 238000005507 spraying Methods 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 4
- 238000005406 washing Methods 0.000 claims description 4
- 239000008367 deionised water Substances 0.000 claims description 3
- 229910021641 deionized water Inorganic materials 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- 239000012752 auxiliary agent Substances 0.000 claims description 2
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 abstract description 12
- 229910000323 aluminium silicate Inorganic materials 0.000 abstract description 9
- 230000002035 prolonged effect Effects 0.000 abstract description 4
- 230000007847 structural defect Effects 0.000 abstract description 4
- 230000007797 corrosion Effects 0.000 abstract description 3
- 238000005260 corrosion Methods 0.000 abstract description 3
- 230000000052 comparative effect Effects 0.000 description 20
- 230000000694 effects Effects 0.000 description 10
- 239000000047 product Substances 0.000 description 8
- 230000009286 beneficial effect Effects 0.000 description 7
- -1 fluoride ions Chemical class 0.000 description 7
- DOTMOQHOJINYBL-UHFFFAOYSA-N molecular nitrogen;molecular oxygen Chemical compound N#N.O=O DOTMOQHOJINYBL-UHFFFAOYSA-N 0.000 description 7
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- PQXKHYXIUOZZFA-UHFFFAOYSA-M lithium fluoride Chemical compound [Li+].[F-] PQXKHYXIUOZZFA-UHFFFAOYSA-M 0.000 description 6
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 4
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 4
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 4
- 239000003513 alkali Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 229910052731 fluorine Inorganic materials 0.000 description 4
- 239000011737 fluorine Substances 0.000 description 4
- 239000000446 fuel Substances 0.000 description 4
- 229910001416 lithium ion Inorganic materials 0.000 description 4
- 239000002244 precipitate Substances 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 229910021536 Zeolite Inorganic materials 0.000 description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000010457 zeolite Substances 0.000 description 3
- MGWGWNFMUOTEHG-UHFFFAOYSA-N 4-(3,5-dimethylphenyl)-1,3-thiazol-2-amine Chemical compound CC1=CC(C)=CC(C=2N=C(N)SC=2)=C1 MGWGWNFMUOTEHG-UHFFFAOYSA-N 0.000 description 2
- YMWAKBHYGURHGI-UHFFFAOYSA-N S(=O)(=O)(O)O.C(CCCCCCCCCCC)[Li] Chemical compound S(=O)(=O)(O)O.C(CCCCCCCCCCC)[Li] YMWAKBHYGURHGI-UHFFFAOYSA-N 0.000 description 2
- 229910002796 Si–Al Inorganic materials 0.000 description 2
- JCCZVLHHCNQSNM-UHFFFAOYSA-N [Na][Si] Chemical compound [Na][Si] JCCZVLHHCNQSNM-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- RCEAADKTGXTDOA-UHFFFAOYSA-N OS(O)(=O)=O.CCCCCCCCCCCC[Na] Chemical compound OS(O)(=O)=O.CCCCCCCCCCCC[Na] RCEAADKTGXTDOA-UHFFFAOYSA-N 0.000 description 1
- 229910000676 Si alloy Inorganic materials 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 239000004115 Sodium Silicate Substances 0.000 description 1
- 229910010038 TiAl Inorganic materials 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 239000003463 adsorbent Substances 0.000 description 1
- UQZIWOQVLUASCR-UHFFFAOYSA-N alumane;titanium Chemical compound [AlH3].[Ti] UQZIWOQVLUASCR-UHFFFAOYSA-N 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000007859 condensation product Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 229910052911 sodium silicate Inorganic materials 0.000 description 1
- 239000012265 solid product Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B39/00—Compounds having molecular sieve and base-exchange properties, e.g. crystalline zeolites; Their preparation; After-treatment, e.g. ion-exchange or dealumination
- C01B39/02—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof; Direct preparation thereof; Preparation thereof starting from a reaction mixture containing a crystalline zeolite of another type, or from preformed reactants; After-treatment thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/10—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate
- B01J20/16—Alumino-silicates
- B01J20/18—Synthetic zeolitic molecular sieves
- B01J20/186—Chemical treatments in view of modifying the properties of the sieve, e.g. increasing the stability or the activity, also decreasing the activity
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/05—Preparation or purification of carbon not covered by groups C01B32/15, C01B32/20, C01B32/25, C01B32/30
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/36—Hydrogen production from non-carbon containing sources, e.g. by water electrolysis
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- Chemical & Material Sciences (AREA)
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- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Chemical Kinetics & Catalysis (AREA)
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Abstract
The application relates to the technical field of molecular sieves, and particularly discloses a sodium-based oxygen generation molecular sieve and a preparation method thereof. The sodium-based oxygen generation molecular sieve is prepared from a red mud mixture through a crystallization reaction, wherein the red mud mixture comprises the following components in parts by weight: 60-80 parts of high-sodium red mud, 30-50 parts of silicon-aluminum-bearing alloy powder, 8-12 parts of an aging aid, 6-10 parts of an organic binder and 12-16 parts of water, wherein the silicon-aluminum-bearing alloy powder is aluminum alloy powder coated with a silicon dioxide film on the surface, and the high-sodium red mud is red mud subjected to spray treatment by a sodium metaaluminate solution. In the high-sodium red mud, sodium metaaluminate and part of silica are combined to form aluminosilicate, so that the possibility of corrosion of the silica by alkaline components is reduced, the structural defects of the molecular sieve are reduced, and the service life of the molecular sieve is prolonged.
Description
Technical Field
The application relates to the technical field of molecular sieves, in particular to a sodium-based oxygen generation molecular sieve and a preparation method thereof.
Background
The air is mainly composed of nitrogen and oxygen, and the total content of the nitrogen and the oxygen in the air accounts for 99% of the total air. In industry, the production of pure oxygen is generally achieved by separating nitrogen and oxygen from air, and the traditional nitrogen-oxygen separation method is a liquefied air separation method. In recent years, with the development of molecular sieve technology, the molecular sieve adsorption oxygen generation method and the liquefied air separation method are gradually replaced, and the core process of the molecular sieve adsorption oxygen generation method is the preparation process of the molecular sieve.
Chinese patent No. CN102530978B discloses a method for preparing a sodium zeolite molecular sieve by using red mud, which comprises the following steps: 1) Sodium hydroxide is used for adjusting the sodium-silicon molar ratio in the red mud to be 1.0-3.0, and sodium silicate is used for adjusting the silicon-aluminum molar ratio to be 2.0-5.0; 2) Heating to age the mixed rubber, wherein the aging temperature of the mixed rubber is 50-60 ℃, and the aging time is 4-24 hours; 3) Heating to perform crystallization reaction at 80-120 deg.C for 6-24 hr; 4) And cooling, filtering, washing and drying the solid product after crystallization to obtain the zeolite molecular sieve.
In view of the above-mentioned related technologies, the inventors believe that, although the molecular sieve is prepared from red mud in the related technology, the red mud has strong alkalinity, and during the crystallization reaction, alkaline components in the red mud are activated, and the activated alkaline components easily attack silica components in the red mud, so that defects in the molecular sieve structure are increased, and the service life of the molecular sieve is affected.
Disclosure of Invention
In the related art, the alkaline components in the red mud are easy to corrode the silica component in the red mud after activation, and the service life of the molecular sieve is influenced. To ameliorate this deficiency, the present application provides a sodium-based oxygen generating molecular sieve and a method of making the same.
In a first aspect, the present application provides a sodium-based oxygen generation molecular sieve, which adopts the following technical scheme: the sodium-based oxygen generation molecular sieve is prepared from a red mud mixture through crystallization reaction, wherein the red mud mixture comprises the following components in parts by weight: 60-80 parts of high-sodium red mud, 30-50 parts of silicon-aluminum-bearing alloy powder, 8-12 parts of an aging aid, 6-10 parts of an organic binder and 12-16 parts of water, wherein the silicon-aluminum-bearing alloy powder is aluminum alloy powder coated with a silicon dioxide film on the surface, and the high-sodium red mud is red mud subjected to spray treatment by a sodium metaaluminate solution.
By adopting the technical scheme, compared with the related technology, the method adopts the sodium metaaluminate solution to replace the sodium hydroxide solution to treat the red mud so as to obtain the high-sodium red mud, and then takes the high-sodium red mud and the silicon-aluminum-bearing alloy powder as main raw materials to carry out crystallization reaction. In the high-sodium red mud, sodium metaaluminate and part of silicon dioxide are combined to form aluminosilicate, and the alkali resistance of silicate is stronger than that of silicon dioxide, so that the possibility of corrosion of silicon dioxide components by alkali components is reduced, the structural defects of the molecular sieve are reduced, and the service life of the molecular sieve is prolonged.
In the crystallization reaction process, alkaline components in the red mud react with the silicon dioxide film on the surface of the silicon-aluminum alloy powder to form silicate gel, and then the alkaline components react with aluminum in the silicon-aluminum alloy powder to form meta-aluminate and hydrogen, so that the consumption of the alkaline components is realized. After the silicate gel is combined with the meta-aluminate diffused to the surface of the silicon-aluminum alloy powder, the aluminosilicate gel is formed on the surface of the silicon-aluminum alloy powder, and the hydrogen generates pores in the aluminosilicate gel in the diffusion process, which is beneficial to improving the adsorption effect of the molecular sieve.
After crystallization reaction, the aluminosilicate gel is solidified, and the silicon-loaded aluminum alloy powder and the high-sodium red mud are combined through the solidified product of the aluminosilicate gel to obtain the sodium-based oxygen generation molecular sieve. In the sodium-based oxygen generation molecular sieve, the residual alloy structure in the silicon-aluminum-bearing alloy powder further increases the porosity of the molecular sieve and improves the adsorption effect of the molecular sieve.
Preferably, the aging aid is sodium dodecyl sulfate or lithium dodecyl sulfate.
By adopting the technical scheme, the sodium dodecyl sulfate and the lithium dodecyl sulfate can accelerate the diffusion of water and play a role in promoting aging. A large amount of fluoride ions are adsorbed in the red mud, which easily influences the adsorption performance of the molecular sieve. And lithium ions can react with fluorine ions to generate precipitates, so that the adsorption capacity of the red mud to the fluorine ions is reduced, and the adsorption effect of the molecular sieve is improved. In addition, lithium fluoride precipitate particles generated by the reaction of fluorine ions and lithium ions can promote crystal nucleus formation in crystallization reaction, thereby being beneficial to improving the production efficiency of the molecular sieve.
Preferably, the preparation method of the silicon-aluminum-bearing alloy powder comprises the following steps:
(1) Uniformly mixing aluminum alloy powder and silica sol to obtain aluminum alloy powder dispersion liquid;
(2) And adding the alumina sol into the aluminum alloy powder dispersion liquid, then evaporating the water in the aluminum alloy powder dispersion liquid to dryness, and crushing the evaporated substance to obtain the silicon-aluminum-carrying alloy powder.
By adopting the technical scheme, in the step (1), silica sol is firstly adsorbed on the surface of aluminum alloy powder, and then in the step (2), the aluminum sol and the silica sol are subjected to electric neutralization, so that the silica sol adsorbed on the surface of the aluminum alloy powder is solidified to form a silicon dioxide film, and the silicon-aluminum-loaded alloy powder is obtained. A part of the cured product of the aluminum sol is doped in the silicon dioxide film, and the charge difference between the cured product of the aluminum sol and the silicon dioxide can increase the deviation degree of the silicon dioxide film from electric neutrality, so that the electrostatic adsorption force between the silicon-aluminum-bearing alloy powder and the high-sodium red mud is enhanced, and the service life of the molecular sieve is prolonged.
Preferably, the nitrogen to oxygen separation ratio of the sodium-based oxygen generating molecular sieve is greater than or equal to 3.
By adopting the technical scheme, the nitrogen-oxygen separation ratio measured by the sodium-based oxygen generation molecular sieve prepared according to the formula system of the application is greater than or equal to 3.
Preferably, the nitrogen adsorption capacity of the sodium-based oxygen generation molecular sieve is more than or equal to 8ml/g.
By adopting the technical scheme, the nitrogen adsorption capacity measured by the sodium-based oxygen generation molecular sieve prepared according to the formula system of the application is more than or equal to 8ml/g.
In a second aspect, the present application provides a method for preparing a sodium-based oxygen generating molecular sieve, which adopts the following technical scheme.
A preparation method of a sodium-based oxygen generation molecular sieve comprises the following steps:
(1) Spraying red mud by using sodium metaaluminate solution to obtain high-sodium red mud;
(2) Uniformly mixing high-sodium red mud, silicon-aluminum-bearing alloy powder, an aging aid, an organic binder and water according to respective parts by weight, and then standing and aging in a closed oxygen-free environment to obtain a red mud mixture;
(3) Mixing the red mud mixture with water to obtain a crystallization reaction liquid, heating the crystallization reaction liquid under a closed condition, filtering the crystallization reaction liquid, washing filter residues obtained by filtering with hydrochloric acid and deionized water in sequence, and drying the filter residues to obtain the sodium-based oxygen production molecular sieve.
By adopting the technical scheme, the method disclosed by the application bonds the high-sodium red mud, the silicon-aluminum-carrying alloy powder and the aging auxiliary agent through the organic binder in the presence of water, then obtains the red mud mixture after aging, then dilutes the red mud mixture into the crystallization reaction liquid, and prepares the sodium-based oxygen generation molecular sieve through the crystallization reaction.
Preferably, the organic binder is starch or hydroxyethyl cellulose.
By adopting the technical scheme, the starch or the hydroxyethyl cellulose can improve the binding degree between the silicon-aluminum-bearing alloy powder and the high-sodium red mud, and is beneficial to improving the durability of the molecular sieve. In addition, alkaline components in the red mud can activate the organic binder in the crystallization reaction liquid, the activated organic binder is carbonized under the crystallization reaction condition, and the carbonized product can absorb pollutants in the air, thereby being beneficial to improving the quality of the prepared oxygen by the adsorption oxygen preparation method.
Preferably, the step (3) of preparing the sodium-based oxygen making molecular sieve is performed in a hydrothermal reactor, the hydrothermal reactor comprises a reaction kettle, a heating mechanism and a heat preservation mechanism, the heat preservation mechanism is used for preserving heat of the reaction kettle, an exhaust valve is arranged on the reaction kettle, the heating mechanism comprises a combustion furnace and a hydrogen separator, the combustion furnace is used for heating the reaction kettle, a feeding port of the hydrogen separator is communicated with the exhaust valve through a first conduit, a discharging port of the hydrogen separator is communicated with the combustion furnace through a second conduit, and the hydrogen separator is used for extracting hydrogen from gas discharged by the exhaust valve.
By adopting the technical scheme, when the hydrothermal reactor operates, the combustion furnace heats the reaction kettle. In the process of operating the combustion furnace, the exhaust valve is opened at regular time, the mixed gas in the reaction kettle is conveyed to the hydrogen separator through the first guide pipe, the hydrogen separator enriches the hydrogen in the mixed gas, and then the hydrogen is conveyed to the combustion furnace through the second guide pipe for combustion, so that the reutilization of byproducts is realized, and the consumption of the combustion furnace on fuel is reduced.
Preferably, the heat preservation mechanism package compressed gas jar, vortex tube and heat preservation pipe, compressed gas jar is arranged in to the vortex tube conveyed compressed air, the hot gas end of vortex tube and the one end intercommunication of heat preservation pipe, the heat preservation pipe is around establishing and fixed connection on reation kettle's lateral wall, the one end that the vortex tube was kept away from to the heat preservation pipe is provided with first solenoid valve.
By adopting the technical scheme, when the combustion furnace runs, compressed air in the compressed air tank passes through the vortex tube, hot air is output at the hot air end of the vortex tube, after the hot air expels the original air in the heat preservation tube, the first electromagnetic valve is closed, and the hot air in the heat preservation tube preserves the heat of the combustion furnace. And after the temperature of the hot air in the heat preservation pipe is reduced, the vortex tube conveys the hot air into the heat preservation cover again.
Preferably, the outer side wall of the first conduit is wound with a condenser pipe and fixedly connected with the condenser pipe, one end of the condenser pipe is communicated with the cold air end of the vortex pipe, and one end of the condenser pipe, which is far away from the vortex pipe, is provided with a second electromagnetic valve.
By adopting the technical scheme, after the compressed air enters the vortex tube, the cold air end of the vortex tube outputs cold air, the cold air condenses the water vapor in the mixed gas, and the generated condensed water returns to the reaction kettle, so that the hydrogen content in the mixed gas is improved, and the burden of the hydrogen separator is reduced.
In summary, the present application has the following beneficial effects:
1. the method uses sodium metaaluminate to convert the silicon dioxide in the red mud into aluminosilicate, thereby reducing the possibility that the silicon dioxide is corroded by alkaline components, being beneficial to reducing the structural defects of the molecular sieve and improving the adsorption effect of the molecular sieve. The silicon-aluminum-carrying alloy powder can consume alkaline substances in the crystallization reaction process, hydrogen is generated in the crystallization reaction process, the hydrogen generates pores in aluminosilicate gel, and the residual structure of the silicon-aluminum-carrying alloy powder also has pores, so that the adsorption effect of the molecular sieve is improved.
2. In the application, lauryl sodium sulfate or lauryl lithium sulfate is preferably selected as an aging aid, wherein lithium ions released by the lauryl lithium sulfate can be combined with fluoride ions in red mud to generate a lithium fluoride precipitate, so that the adsorption amount of the red mud to the fluoride ions is reduced, and the adsorption effect of the molecular sieve is improved. In addition, the lithium fluoride precipitate can promote the formation of crystal nucleus in the crystallization reaction process, thereby improving the production efficiency of the molecular sieve.
3. According to the method, starch or hydroxyethyl cellulose is selected as an organic binder, the starch or hydroxyethyl cellulose can be carbonized under the condition of crystallization reaction, and the carbonized product has a porous structure and is beneficial to improving the adsorption effect of the molecular sieve on pollutants.
Drawings
FIG. 1 is a schematic diagram of the overall structure of a hydrothermal reactor in an embodiment of the present application.
Reference numerals: 1. a reaction kettle; 2. a heating mechanism; 21. a combustion furnace; 22. a hydrogen separator; 3. a heat preservation mechanism; 31. a compressed gas tank; 32. a vortex tube; 33. a heat preservation pipe; 4. an exhaust valve; 5. a first conduit; 6. A second conduit; 7. a first solenoid valve; 8. a second solenoid valve; 9. a condenser tube.
Detailed Description
The present application will be described in further detail with reference to examples and preparations.
The raw materials used in the preparation examples of the application can be obtained by market, wherein the aluminum alloy powder is prepared by crushing GK-TiAl type titanium-aluminum alloy provided by Beijing Gaokou New Material science and technology Co.
Preparation example of Si-Al alloy-carrying powder
The following will explain preparation example 1 as an example.
Preparation example 1
In the application, the silicon-aluminum-bearing alloy powder is prepared by the following method:
(1) Uniformly mixing aluminum alloy powder and silica sol containing 80% of water according to the weight ratio of 1;
(2) Standing the aluminum alloy powder dispersion liquid for 2 hours, then adding aluminum sol into the aluminum alloy powder dispersion liquid, uniformly stirring, evaporating water in the aluminum alloy powder dispersion liquid to dryness at 60 ℃, and crushing a substance obtained by evaporation to dryness to obtain silicon-aluminum-carrying alloy powder; in the step, the water content of the aluminum sol is 80%, and the weight of the aluminum sol is 10% of the weight of the silica sol in the step (1).
Examples
The raw materials used in the embodiment of the application can be obtained commercially, wherein the red mud is the red mud obtained by a mixed-series process provided by Shanxi aluminum factories.
Examples 1 to 5
The following description will be given by taking example 1 as an example.
Example 1
In example 1, a sodium-based oxygen generating molecular sieve was prepared as follows:
(1) Spraying the red mud by using 1mol/L sodium metaaluminate solution until the sodium-silicon molar ratio in the red mud is adjusted to 2.0 to obtain high-sodium red mud;
(2) Uniformly mixing 60kg of high-sodium red mud, 30kg of silicon-aluminum-bearing alloy powder prepared in preparation example 1, 8kg of aging aid, 6kg of organic binder and 12kg of water, and then standing and aging for 10 hours in a closed environment to obtain a red mud mixture; in the step, the aging aid is sodium dodecyl sulfate, and the organic binder is starch;
(3) Mixing the red mud mixture with water according to a weight ratio of 1.
In this embodiment, the crystallization reaction in step (3) is performed in a hydrothermal reactor, referring to fig. 1, the hydrothermal reactor includes a reaction kettle 1, a heating mechanism 2 and a heat preservation mechanism 3, an exhaust valve 4 is fixedly connected to the top end of the reaction kettle 1, when the temperature of the crystallization reaction liquid needs to be raised, the heating mechanism 2 heats the reaction kettle 1, after the crystallization reaction liquid reaches a set temperature, the heating mechanism 2 reduces heating power, and the heat preservation mechanism 3 preserves the temperature of the reaction kettle 1.
Referring to fig. 1, the heating mechanism 2 includes a combustion furnace 21 and a hydrogen separator 22, and the top end of the combustion furnace 21 is attached and fixedly connected to the bottom end of the reaction vessel 1. A first conduit 5 is arranged between the hydrogen separator 22 and the reaction kettle 1, one end of the first conduit 5 is communicated with a feed port of the hydrogen separator 22, the other end is communicated with a vent valve 4, and the first conduit 5 is fixedly connected with the hydrogen separator 22. A second conduit 6 is arranged between the hydrogen separator 22 and the combustion furnace 21, one end of the second conduit 6 is communicated with a discharge port of the hydrogen separator 22, and the other end is communicated with the combustion furnace 21.
Referring to fig. 1, when the crystallized reaction solution needs to be heated, an operator adds fuel into the combustion furnace, and after the fuel in the combustion furnace 21 is combusted, the combustion furnace 21 transfers heat to the reaction kettle 1 by means of contact heat transfer, so that the temperature of the crystallized reaction solution in the reaction kettle 1 is raised, thereby heating the reaction kettle. In the crystallization reaction process, the exhaust valve 4 is periodically opened, the mixed gas generated in the reaction kettle 1 is conveyed into the hydrogen separator 22 through the first conduit 5, the hydrogen separator 22 enriches the hydrogen in the mixed gas, and then the hydrogen is conveyed into the combustion furnace 21 through the second conduit 6 for combustion treatment, so that the reutilization of tail gas is realized, and the consumption of the combustion furnace 21 on fuel is reduced.
Referring to fig. 1, the heat preservation mechanism 3 comprises a compressed air tank 31, a vortex tube 32 and a heat preservation tube 33, the vortex tube 32 is fixedly connected to the top end of the compressed air tank 31, an air inlet port of the vortex tube 32 is communicated with the compressed air tank 31, and a hot air end of the vortex tube 32 is communicated with one end of the heat preservation tube 33. The heat preservation pipe 33 is wound and fixedly connected on the outer side wall of the reaction kettle 1, and one end of the heat preservation pipe 33, which is far away from the vortex tube 32, is fixedly connected with the first electromagnetic valve 7 at the port.
Referring to fig. 1, when the temperature of the reaction kettle 1 needs to be maintained, the first electromagnetic valve 7 is opened, the compressed air in the compressed air tank 31 enters the vortex tube 32, and the hot gas end of the vortex tube 32 transmits the hot air into the heat-preserving tube 33 until the original air in the heat-preserving tube 33 is completely removed. Then the first electromagnetic valve 7 is closed, and the hot air in the heat preservation pipe 33 is used for preserving the heat of the reaction kettle 1.
Referring to fig. 1, a condensing tube 9 is wound on the outer wall of one end of the first conduit 5 close to the exhaust valve 4, the condensing tube 9 is fixedly connected with the first conduit 5, one end of the condensing tube 9 is communicated with the cold air end of the vortex tube 32, and the other end is fixedly connected with a second electromagnetic valve 8 at the port.
Referring to fig. 1, after the compressed air enters the vortex tube 32, the cold air end of the vortex tube 32 delivers the cold air into the condensation tube 9, the cold air in the condensation tube 9 condenses the water vapor in the first conduit 5, and the condensation product of the water vapor flows back into the reaction kettle 1. The condenser pipe 9 increases the proportion of hydrogen in the mixed gas, and reduces the burden on the hydrogen separator 22 when processing the mixed gas.
As shown in Table 1, examples 1 to 5 are different mainly in the blending ratio of the raw materials
TABLE 1
| Sample(s) | High sodium red mud/kg | Si-Al alloy powder/kg | Ageing assistant/kg | Organic binder/kg | Water/kg |
| Example 1 | 60 | 30 | 8 | 6 | 12 |
| Example 2 | 65 | 35 | 9 | 7 | 13 |
| Example 3 | 70 | 40 | 10 | 8 | 14 |
| Example 4 | 75 | 45 | 11 | 9 | 15 |
| Example 5 | 80 | 50 | 12 | 10 | 16 |
Example 6
This example differs from example 3 in that the aging aid is lithium dodecyl sulfate.
Example 7
This example differs from example 6 in that the organic binder is hydroxyethyl cellulose.
Comparative example
Comparative example 1
A sodium type zeolite molecular sieve prepared according to preparation example 1 of chinese patent publication No. CN 102530978B.
Comparative example 2
The difference between the comparative example and the example 3 is that the red mud which is not sprayed with the sodium metaaluminate solution is used to replace the high-sodium red mud;
comparative example 3
This comparative example differs from example 3 in that aluminum powder is used instead of the aluminum-bearing silicon alloy powder.
Performance detection test method
In order to characterize the service life of the molecular sieve, the molecular sieves of the examples and the comparative examples are added into an nz-40/39 PSA pressure swing adsorption oxygen generation device provided by Suzhou Haizian purification equipment Co., ltd for oxygen generation by adsorption, and the service life of the molecular sieve is characterized according to the change of the nitrogen adsorption amount before and after oxygen generation by adsorption of the molecular sieve, and the specific steps are as follows:
(1) Detecting and recording the nitrogen adsorption capacity of the molecular sieve to obtain the initial nitrogen adsorption capacity x 1 Then adding a molecular sieve into the adsorption oxygen-making device according to the maximum capacity of the adsorption oxygen-making device;
(2) Starting the adsorption oxygen generation device, taking out the molecular sieve after accumulative running for 2000h, and detecting the nitrogen adsorption capacity again to obtain the residual nitrogen adsorption capacity x 2 ；
(3) The loss rate α of the nitrogen gas adsorption amount was calculated according to the following formula, and the calculation result was recorded.
The detection method of the nitrogen adsorption capacity refers to a GB/T35109-2017 molecular sieve nitrogen-oxygen separation static determination method, and the loss rate of the nitrogen adsorption capacity is recorded in a table 2 after statistics.
TABLE 2
| Sample(s) | α/％ | Sample(s) | α/％ |
| Example 1 | 6.7 | Example 6 | 6.0 |
| Example 2 | 6.4 | Example 7 | 6.2 |
| Example 3 | 6.1 | Comparative example 1 | 15.6 |
| Example 4 | 6.2 | Comparative example 2 | 12.8 |
| Example 5 | 6.4 | Comparative example 3 | 13.7 |
In addition to detecting the nitrogen adsorption amount, the nitrogen-oxygen separation ratio of the molecular sieve is detected by referring to GB/T35109-2017 molecular sieve nitrogen-oxygen separation static determination method, and the primary detection results of the nitrogen adsorption amount and the nitrogen-oxygen separation ratio are shown in Table 3
TABLE 3
In addition, in order to test the adsorption effect of the molecular sieve on harmful gases in the air, the molecular sieves of example 6, example 7 and comparative example 1 are selected for standby, then the air, the sulfur dioxide and the nitrogen dioxide are mixed according to a volume ratio of 8 1 Then introducing the gas to be detected into a drying tube filled with a molecular sieve, and finally detecting the total content m of sulfur dioxide and nitrogen dioxide in the tail gas 2 The harmful gas removal rate β was calculated according to the following formula, and the calculation results are shown in table 4.
TABLE 4
| Sample(s) | β/％ |
| Example 6 | 89.6 |
| Example 7 | 92.4 |
| Comparative example 1 | 72.8 |
As can be seen by combining examples 1-5 and comparative example 1 and table 2, the nitrogen adsorption capacity loss rates measured in examples 1-5 are all lower than in comparative example 1, indicating that the formulation system of the present application helps to reduce the decrease in adsorption performance of the molecular sieve.
It can be seen from the combination of example 3 and comparative example 2 and table 2 that the loss rate of nitrogen adsorption measured in example 3 is lower than that in comparative example 2, which shows that after the application uses sodium metaaluminate to spray red mud, sodium metaaluminate combines with a part of silica to form aluminosilicate, and silicate has stronger alkali resistance than silica, thereby reducing the possibility of corrosion of silica component by alkali component, being helpful for reducing structural defects of molecular sieve and prolonging the service life of molecular sieve.
It can be seen from the combination of example 3 and comparative example 3 and table 2 that the loss rate of the nitrogen adsorption capacity measured in example 3 is lower than that in comparative example 3, and it is described that a part of the cured product of the alumina sol is doped in the silica film carrying the silicon aluminum alloy powder, and the difference of the charges between the cured product of the alumina sol and the silica increases the degree of deviation of the silica film from electrical neutrality, so that the electrostatic adsorption force between the silicon aluminum alloy powder and the high-sodium red mud is enhanced, the service life of the molecular sieve is prolonged, and it can be seen from the combination of example 3 and example 6 and table 3 that the nitrogen adsorption capacity and the nitrogen-oxygen separation value of example 6 are both higher than those of example 3, which indicates that lithium ions released by lithium dodecyl sulfate reduce the adsorption capacity of the red mud to fluorine ions, and improve the adsorption effect of the molecular sieve.
It can be seen from the combination of example 6, example 7, comparative example 1 and table 4 that the removal rate of the harmful gas measured in example 6 and example 7 is higher than that in comparative example 1, which indicates that the carbonized product of the organic adsorbent of the present application improves the adsorption effect of the molecular sieve on the harmful gas.
The specific embodiments are only for explaining the present application and are not limiting to the present application, and those skilled in the art can make modifications to the embodiments without inventive contribution as required after reading the present specification, but all the embodiments are protected by patent law within the scope of the claims of the present application.
Claims (8)
1. The sodium-based oxygen generation molecular sieve is characterized by being prepared from a red mud mixture through crystallization reaction, wherein the red mud mixture comprises the following components in parts by weight: 60-80 parts of high-sodium red mud, 30-50 parts of silicon-aluminum-bearing alloy powder, 8-12 parts of an aging aid, 6-10 parts of an organic binder and 12-16 parts of water, wherein the silicon-aluminum-bearing alloy powder is aluminum alloy powder coated with a silicon dioxide film on the surface, and the high-sodium red mud is red mud subjected to spray treatment by a sodium metaaluminate solution; the aging auxiliary agent is sodium dodecyl sulfate or lithium dodecyl sulfate; the organic binder is starch or hydroxyethyl cellulose;
the preparation method of the silicon-aluminum-carrying alloy powder comprises the following steps:
(1) Uniformly mixing aluminum alloy powder and silica sol to obtain aluminum alloy powder dispersion liquid;
(2) Adding aluminum sol into the aluminum alloy powder dispersion liquid, then evaporating the water in the aluminum alloy powder dispersion liquid to dryness, and crushing the evaporated substance to obtain silicon-aluminum-carrying alloy powder;
the preparation method of the sodium-based oxygen generation molecular sieve comprises the following steps:
(1) Spraying red mud by using sodium metaaluminate solution to obtain high-sodium red mud;
(2) Uniformly mixing high-sodium red mud, silicon-aluminum-bearing alloy powder, an aging assistant, an organic binder and water according to respective parts by weight, and then standing and aging in a closed oxygen-free environment to obtain a red mud mixture;
(3) Mixing the red mud mixture with water to obtain a crystallization reaction liquid, heating the crystallization reaction liquid under a closed condition, filtering the crystallization reaction liquid, washing filter residues obtained by filtering with hydrochloric acid and deionized water in sequence, and drying the filter residues to obtain a sodium-based oxygen generation molecular sieve;
the step (3) of preparing the sodium-based oxygen production molecular sieve is carried out in a hydrothermal reactor, the hydrothermal reactor comprises a reaction kettle (1), a heating mechanism (2) and a heat preservation mechanism (3), the heat preservation mechanism (3) is used for preserving heat of the reaction kettle (1), an exhaust valve (4) is arranged on the reaction kettle (1), the heating mechanism (2) comprises a combustion furnace (21) and a hydrogen separator (22), the combustion furnace (21) is used for heating the reaction kettle (1), a first conduit (5) is arranged between the hydrogen separator (22) and the reaction kettle (1), one end of the first conduit (5) is communicated with a feeding port of the hydrogen separator (22), the other end of the first conduit is communicated with the exhaust valve (4), the first conduit (5) is fixedly connected with the hydrogen separator (22), a discharging port of the hydrogen separator (22) is communicated with the combustion furnace (21) through a second conduit (6), and the hydrogen separator (22) is used for extracting hydrogen from gas discharged from the exhaust valve (4); the heat preservation mechanism (3) comprises a compressed air tank (31), a vortex tube (32) and a heat preservation tube (33), the compressed air tank (31) is used for conveying compressed air into the vortex tube (32), the hot gas end of the vortex tube (32) is communicated with one end of the heat preservation tube (33), the heat preservation tube (33) is wound on the outer side wall of the reaction kettle (1) and fixedly connected with the outer side wall of the reaction kettle (1), and a first electromagnetic valve (7) is arranged at one end, far away from the vortex tube (32), of the heat preservation tube (33); the utility model discloses a vortex tube (32) of air conditioner, including first pipe (5), the lateral wall of first pipe (5) is last around establishing and fixedly connected with condenser pipe (9), the one end of condenser pipe (9) and the cold air end intercommunication of vortex tube (32), the one end that vortex tube (32) were kept away from in condenser pipe (9) is provided with second solenoid valve (8).
2. The sodium-based oxygen generating molecular sieve of claim 1, wherein the sodium-based oxygen generating molecular sieve has a nitrogen to oxygen separation ratio greater than or equal to 3.
3. The sodium-based oxygen generating molecular sieve of claim 1, wherein the sodium-based oxygen generating molecular sieve has a nitrogen adsorption capacity of greater than or equal to 8ml/g.
4. The method of making a sodium-based oxygen generating molecular sieve according to any one of claims 1 to 3, comprising the steps of:
(1) Spraying red mud by using sodium metaaluminate solution to obtain high-sodium red mud;
(2) Uniformly mixing high-sodium red mud, silicon-aluminum-bearing alloy powder, an aging aid, an organic binder and water according to respective parts by weight, and then standing and aging in a closed oxygen-free environment to obtain a red mud mixture;
(3) Mixing the red mud mixture with water to obtain a crystallization reaction liquid, heating the crystallization reaction liquid under a closed condition, filtering the crystallization reaction liquid, washing filter residues obtained by filtering with hydrochloric acid and deionized water in sequence, and drying the filter residues to obtain the sodium-based oxygen production molecular sieve.
5. The method of claim 4, wherein the organic binder is starch or hydroxyethyl cellulose.
6. The method for preparing the sodium-based oxygen-generating molecular sieve according to claim 4, wherein the step (3) of preparing the sodium-based oxygen-generating molecular sieve is performed in a hydrothermal reactor, the hydrothermal reactor comprises a reaction kettle (1), a heating mechanism (2) and a heat-preserving mechanism (3), the heat-preserving mechanism (3) is used for preserving heat of the reaction kettle (1), a vent valve (4) is arranged on the reaction kettle (1), the heating mechanism (2) comprises a combustion furnace (21) and a hydrogen separator (22), the combustion furnace (21) is used for heating the reaction kettle (1), a first conduit (5) is arranged between the hydrogen separator (22) and the reaction kettle (1), one end of the first conduit (5) is communicated with a feeding port of the hydrogen separator (22), the other end is communicated with the vent valve (4), the first conduit (5) is fixedly connected with the hydrogen separator (22), a discharging port of the hydrogen separator (22) is communicated with the combustion furnace (21) through a second conduit (6), and the vent valve (22) is used for extracting hydrogen from gas discharged from the hydrogen separator (4).
7. The preparation method of the sodium-based oxygen generation molecular sieve according to claim 6, wherein the heat preservation mechanism (3) comprises a compressed air tank (31), a vortex tube (32) and a heat preservation tube (33), the compressed air tank (31) is used for conveying compressed air into the vortex tube (32), the hot gas end of the vortex tube (32) is communicated with one end of the heat preservation tube (33), the heat preservation tube (33) is wound and fixedly connected on the outer side wall of the reaction kettle (1), and a first electromagnetic valve (7) is arranged at one end of the heat preservation tube (33) far away from the vortex tube (32).
8. The method for preparing the sodium-based oxygen generation molecular sieve according to claim 7, wherein a condenser tube (9) is wound on and fixedly connected to the outer side wall of the first conduit (5), one end of the condenser tube (9) is communicated with the cold air end of the vortex tube (32), and a second electromagnetic valve (8) is arranged at one end of the condenser tube (9) far away from the vortex tube (32).
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| CN102530978A (en) * | 2011-08-09 | 2012-07-04 | 中国环境科学研究院 | Method for preparing sodium type zeolite molecular sieves by utilizing red mud |
| CN105565334A (en) * | 2016-01-18 | 2016-05-11 | 明光市飞洲新材料有限公司 | High-separation oxygen generation molecular sieve and preparation method thereof |
| CN113213503A (en) * | 2021-06-23 | 2021-08-06 | 南京永成分子筛有限公司 | Sodium-based oxygen generation molecular sieve and preparation process thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US4241036A (en) * | 1975-10-23 | 1980-12-23 | Union Carbide Corporation | Synthetic crystalline zeolite and process for preparing same |
| JPS5864132A (en) * | 1981-10-14 | 1983-04-16 | Mitsubishi Heavy Ind Ltd | Adsorbent for adsorbing and separating gas |
| US5573745A (en) * | 1994-05-12 | 1996-11-12 | Air Products And Chemicals, Inc. | High micropore volume low silica EMT-containing metallosilicates |
| CN102530978A (en) * | 2011-08-09 | 2012-07-04 | 中国环境科学研究院 | Method for preparing sodium type zeolite molecular sieves by utilizing red mud |
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