CN113426405A - Molecular sieve glass fiber VOC adsorption material - Google Patents
Molecular sieve glass fiber VOC adsorption material Download PDFInfo
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- CN113426405A CN113426405A CN202110686579.1A CN202110686579A CN113426405A CN 113426405 A CN113426405 A CN 113426405A CN 202110686579 A CN202110686579 A CN 202110686579A CN 113426405 A CN113426405 A CN 113426405A
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- 239000002808 molecular sieve Substances 0.000 title claims abstract description 72
- 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 69
- 239000000463 material Substances 0.000 title claims abstract description 46
- 239000003365 glass fiber Substances 0.000 title claims abstract description 24
- 238000001179 sorption measurement Methods 0.000 title claims abstract description 11
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 138
- 239000004115 Sodium Silicate Substances 0.000 claims abstract description 30
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims abstract description 30
- 229910052911 sodium silicate Inorganic materials 0.000 claims abstract description 30
- 239000011734 sodium Substances 0.000 claims abstract description 27
- ANBBXQWFNXMHLD-UHFFFAOYSA-N aluminum;sodium;oxygen(2-) Chemical compound [O-2].[O-2].[Na+].[Al+3] ANBBXQWFNXMHLD-UHFFFAOYSA-N 0.000 claims abstract description 18
- 229910001388 sodium aluminate Inorganic materials 0.000 claims abstract description 18
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 17
- 229910052593 corundum Inorganic materials 0.000 claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 17
- 229910001845 yogo sapphire Inorganic materials 0.000 claims abstract description 17
- KKCBUQHMOMHUOY-UHFFFAOYSA-N Na2O Inorganic materials [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000007788 liquid Substances 0.000 claims abstract description 11
- 239000002994 raw material Substances 0.000 claims abstract description 7
- 235000011121 sodium hydroxide Nutrition 0.000 claims description 44
- 238000006243 chemical reaction Methods 0.000 claims description 21
- 239000000203 mixture Substances 0.000 claims description 20
- 238000000034 method Methods 0.000 claims description 19
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 17
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 7
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 6
- KJFMBFZCATUALV-UHFFFAOYSA-N phenolphthalein Chemical compound C1=CC(O)=CC=C1C1(C=2C=CC(O)=CC=2)C2=CC=CC=C2C(=O)O1 KJFMBFZCATUALV-UHFFFAOYSA-N 0.000 claims description 6
- 238000002441 X-ray diffraction Methods 0.000 claims description 5
- 239000002245 particle Substances 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 4
- 150000003839 salts Chemical class 0.000 claims description 4
- 239000006004 Quartz sand Substances 0.000 claims description 3
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 claims description 3
- XLYOFNOQVPJJNP-ZSJDYOACSA-N heavy water Substances [2H]O[2H] XLYOFNOQVPJJNP-ZSJDYOACSA-N 0.000 claims description 3
- 239000003014 ion exchange membrane Substances 0.000 claims description 3
- 239000012452 mother liquor Substances 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 238000010791 quenching Methods 0.000 claims description 3
- 235000017550 sodium carbonate Nutrition 0.000 claims description 3
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 3
- 239000008187 granular material Substances 0.000 claims 1
- 230000000171 quenching effect Effects 0.000 claims 1
- 229910052783 alkali metal Inorganic materials 0.000 abstract description 6
- -1 alkali metal cations Chemical class 0.000 abstract description 6
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 abstract description 6
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 abstract description 4
- 239000000693 micelle Substances 0.000 abstract description 4
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 abstract description 4
- 229910000323 aluminium silicate Inorganic materials 0.000 abstract description 3
- 150000001768 cations Chemical class 0.000 abstract description 2
- 239000003112 inhibitor Substances 0.000 abstract description 2
- 238000006116 polymerization reaction Methods 0.000 abstract description 2
- 239000003381 stabilizer Substances 0.000 abstract description 2
- 239000000243 solution Substances 0.000 description 29
- 230000015572 biosynthetic process Effects 0.000 description 13
- 238000003786 synthesis reaction Methods 0.000 description 13
- 229910052681 coesite Inorganic materials 0.000 description 7
- 229910052906 cristobalite Inorganic materials 0.000 description 7
- 238000002360 preparation method Methods 0.000 description 7
- 239000000377 silicon dioxide Substances 0.000 description 7
- 229910052682 stishovite Inorganic materials 0.000 description 7
- 229910052905 tridymite Inorganic materials 0.000 description 7
- 229910021536 Zeolite Inorganic materials 0.000 description 3
- BFRXZIMAUMUZJH-UHFFFAOYSA-M [OH-].[Na+].[Na+].[Na+].[Na+].[Al+3].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-] Chemical compound [OH-].[Na+].[Na+].[Na+].[Na+].[Al+3].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-] BFRXZIMAUMUZJH-UHFFFAOYSA-M 0.000 description 3
- 239000012267 brine Substances 0.000 description 3
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 230000002194 synthesizing effect Effects 0.000 description 3
- 239000010457 zeolite Substances 0.000 description 3
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 2
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 description 2
- 239000000460 chlorine Substances 0.000 description 2
- 238000004590 computer program Methods 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 239000003063 flame retardant Substances 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000000376 reactant Substances 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 description 1
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical group [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- KZBUYRJDOAKODT-UHFFFAOYSA-N Chlorine Chemical compound ClCl KZBUYRJDOAKODT-UHFFFAOYSA-N 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 229910007271 Si2O3 Inorganic materials 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 239000003463 adsorbent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910001424 calcium ion Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 230000001687 destabilization Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003631 expected effect Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 238000001027 hydrothermal synthesis Methods 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 239000003456 ion exchange resin Substances 0.000 description 1
- 229920003303 ion-exchange polymer Polymers 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
Images
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- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
- B01D2257/708—Volatile organic compounds V.O.C.'s
-
- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Silicates, Zeolites, And Molecular Sieves (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
The invention discloses a molecular sieve glass fiber VOC adsorption material which is prepared from the following raw materials in parts by weight: sodium aluminate (NaAlO)2) 3-7.5 parts of solution and sodium silicate (Na)2O·nSiO2)1 part of solution, 2-5 parts of sodium hydroxide (NaOH) and liquid water (H)2O)175-2) Na in solution2O content of 0.643-0.918mol/L, Al2O30.274-0.359mo1/L of sodium silicate (Na)2O·nSiO2) Modulus n ═ SiO in solution2/Na2O (molar ratio), which is a stabilizer or polymerization inhibitor for silicate or silica sol by the presence of alkali metal cations in the soluble silicate solution and silica sol, and alkali metal cations in the aluminosilicate gelSome of the building blocks in the micelle are stabilized and the micelle can be "destabilized" if H + or some other cation is substituted for these alkali metal cations.
Description
Technical Field
The application relates to the technical field of molecular sieve materials, in particular to a molecular sieve glass fiber VOC adsorption material.
Background
The molecular sieve is a kind of artificially synthesized hydrated aluminosilicate (zeolite) with the function of screening molecules, and it has high adsorption capacity, strong selectivity and high temperature resistance. It is widely used in organic chemical industry and petrochemical industry, and is also an excellent adsorbent for gas dehydration. The method is also increasingly emphasized in the aspect of waste gas purification, and the hydrothermal synthesis method is the most common and effective way in the synthesis of zeolite molecular sieves;
the Chinese patent discloses: "method for preparing molecular sieve material", publication no: CN103534025B, a reactor equipped with a mixer having a froude number of at least 1, mixing water, at least one source of an oxide of a tetravalent and/or trivalent element and at least one structure directing agent to produce a molecular sieve synthesis mixture having a solids content of at least about 20 wt%, heating the molecular sieve synthesis mixture in the reactor while agitating the mixture with said mixer to form crystals of said molecular sieve material, and subsequently recovering the molecular sieve crystals from the reactor;
however, the molecular sieve with certain requirements for calcium ion exchange capacity has high requirements for the purity of products, the synthesis of the molecular sieve is a quite complex process, and is influenced by a plurality of factors, if the factors cannot be controlled, unexpected results can be obtained, even synthesis failure can be caused, in the synthesis process, not only the influence of various factors on the synthesis process is noticed, but also the mutual connection among the factors is noticed, and the expected effect can be obtained by adopting proper operation steps, wherein the proportion of reaction materials is a key factor, so that the molecular sieve glass fiber VOC adsorbing material is provided, different reactants are obtained by controlling the proportion of the reaction materials, the waste of the materials is avoided, and the synthesis result is prevented from being inconsistent with the expectation.
Disclosure of Invention
The invention aims to provide a molecular sieve glass fiber VOC adsorbing material to solve the problems in the background technology.
The embodiment of the application adopts the following technical scheme:
the molecular sieve glass fiber VOC adsorption material is prepared from the following raw materials in parts by weight:
preferably, said sodium aluminate (NaAlO)2) Na in solution2O content of 0.643-0.918mol/L, Al2O3The content is 0.274-0.359mo 1/L;
preferably, the sodium silicate (Na)2O·nSiO2) Modulus n ═ SiO in solution2/Na2O (molar ratio), the modulus of which shows the composition of sodium silicate, is an important parameter of sodium silicate and is between 1.5 and 3.5;
preferably, the sodium hydroxide (NaOH) is obtained from a raw salt by an ion exchange membrane process, and has a reaction equation of: 2NaCl +2H2O→2NaOH+H2+Cl2；
Preferably, the sodium hydroxide (NaOH) is used for determining the content of the effective components of the sodium hydroxide by fully dissolving a sodium hydroxide sample, titrating by using a standard hydrochloric acid solution and simultaneously using phenolphthalein as an indicator;
preferably, the sodium silicate (Na)2O·nSiO2) By mixing soda ash (Na)2CO3) And quartz Sand (SiO) with the particle size of 0.180-0.250 mm (60-80 meshes)2) Uniformly mixing the raw materials in proportion, feeding the mixture into a horseshoe flame kiln, melting the mixture at 1450-1500 ℃, and pressing the mixture into blocks or water-quenching the blocks into particles to obtain the horseshoe flame-retardant resin;
preferably, said sodium aluminate (NaAlO)2) Adding crude aluminum hydroxide into a sodium hydroxide solution at the temperature of 50-80 ℃, heating to 110 ℃, and preserving heat for 3 hours to obtain sodium aluminate (NaAlO)2) And (3) solution.
The invention provides a preparation method of a molecular sieve glass fiber VOC adsorption material, which comprises the following steps:
1): sodium aluminate (NaAlO)2) Solution, sodium silicate (Na)2O·nSiO2) Solution, sodium hydroxide (NaOH) and liquid water (H)2O) adding the mixture into a reactor according to a pre-configured proportion;
2): sodium aluminate (NaAlO)2) Solution, sodium silicate (Na)2O·nSiO2) Solution, sodium hydroxide (NaOH) and liquid water (H)2O) reacting in a reactor, and then separating to obtain mother liquor and a dried molecular sieve to be washed;
3): the molecular sieve separated from the reactor was washed and dried and the product phase was analyzed by X-ray diffraction.
The embodiment of the application adopts at least one technical scheme which can achieve the following beneficial effects:
firstly, in order to synthesize a certain type of molecular sieve, reaction materials with a certain proportion are prepared, the proportion of the reaction materials is different, the obtained molecular sieve is different in variety, and in the proportion range of generating the certain molecular sieve, when other conditions are fixed, the larger the alkalinity is, the faster the crystallization speed is, and the smaller the granularity is; the smaller the silicon-aluminum ratio is, the faster the crystallization speed is, and the lower the silicon-aluminum ratio of the product is;
secondly, alkali metal cations present a stabilizing effect in the soluble silicate solution and in the silica sol and can be used as a stabilizer or polymerization inhibitor for silicate or silica sol, and alkali metal cations also have the same stabilizing effect on aluminosilicate gel and can stabilize some structural units in micelles, and if H + or some other cations are used for replacing the alkali metal cations, the micelles can be subjected to destabilization;
thirdly, different reactants are obtained by controlling the proportion of the reaction materials, so that the waste of the materials is avoided, and the situation that the synthetic result is not in line with the expectation is avoided.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
FIG. 1 is a schematic diagram of products of different ratios of reaction materials in the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail and completely with reference to the following specific embodiments of the present application and the accompanying drawings. It should be apparent that the described embodiments are only some of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The technical solutions provided by the embodiments of the present application are described in detail below with reference to the accompanying drawings.
Example 1: referring to fig. 1, a molecular sieve glass fiber VOC adsorption material is prepared from the following raw materials in parts by weight: sodium aluminate (NaAlO)2) 3-7.5 parts of solution and sodium silicate (Na)2O·nSiO2)1 part of solution, 2-5 parts of sodium hydroxide (NaOH) and liquid water (H)2O)175-2) Na in solution2O content of 0.643-0.918mol/L, Al2O30.274-0.359mo1/L of sodium silicate (Na)2O·nSiO2) Modulus n ═ SiO in solution2/Na2O (molar ratio), the modulus of which shows the composition of sodium silicate, is an important parameter of sodium silicate, and is 1.5-3.5, the larger the modulus of sodium silicate is, the more difficult solid sodium silicate is to be dissolved in water, n is 1, the sodium silicate can be dissolved by warm water at normal time, when n is increased, the solid sodium silicate can be dissolved by hot water, when n is more than 3, the steam with the pressure of more than 4 atmospheres is needed for dissolving, the larger the modulus of sodium silicate is, the more Si content is, the viscosity of sodium silicate is increased, the sodium silicate is easy to decompose and harden, and the cohesive force is increased;
sodium hydroxide (NaOH) is obtained from raw salt by an ion exchange membrane process, and has the reaction equation: 2NaCl +2H2O→2NaOH+H2+Cl2The primary refined salt water is passed through microporous sintered carbon tube filterFiltering, refining in chelating ion exchange resin tower to reduce the content of Ca and Mg in brine to below 0.002%, electrolyzing refined brine to generate chlorine in anode chamber, making Na + in the brine in anode chamber pass through ionic membrane and enter OH-in cathode chamber and cathode chamber to generate sodium hydroxide, making H + discharge on cathode to generate hydrogen, adding high-purity hydrochloric acid to anode chamber to neutralize the returned OH-, adding pure water to cathode chamber, the concentration of the high-purity caustic soda generated in the cathode chamber is 30-32 percent (mass), the high-purity caustic soda can be directly used as a liquid caustic soda product, and can also be further decocted to be concentrated to prepare a finished product of caustic soda in the whole body, sodium hydroxide (NaOH) is fully dissolved in a sodium hydroxide sample before use, titrating with standard hydrochloric acid solution, and measuring the content of effective components of sodium hydroxide with phenolphthalein as indicator;
sodium silicate (Na)2O·nSiO2) By mixing soda ash (Na)2CO3) And quartz Sand (SiO) with the particle size of 0.180-0.250 mm (60-80 meshes)2) Uniformly mixing the raw materials in proportion, feeding the mixture into a horseshoe flame kiln, melting the mixture at 1450-1500 ℃, and pressing the mixture into blocks or water-quenching the blocks into particles to obtain the horseshoe flame-retardant resin;
sodium aluminate (NaAlO)2) Adding crude aluminum hydroxide into a sodium hydroxide solution at the temperature of 50-80 ℃, heating to 110 ℃, and preserving heat for 3 hours to obtain sodium aluminate (NaAlO)2) And (3) solution.
When the proportion of the reaction materials is Na2O：Al2O3：SiO2：H2The ratio of O is 3: 1:2:185 hours later, pure 4A molecular sieve is obtained
The preparation method of the molecular sieve glass fiber VOC adsorption material comprises the following steps:
1): sodium aluminate (NaAlO)2) Solution, sodium silicate (Na)2O·nSiO2) Solution, sodium hydroxide (NaOH) and liquid water (H)2O) adding the mixture into a reactor according to a pre-configured proportion;
2): sodium aluminate (NaAlO)2) Solution, sodium silicate (Na)2O·nSiO2) Solution, sodium hydroxide (NaOH) and liquid water (H)2O) is separated after the reaction in the reactor to obtain a mother liquorLiquid and a dried molecular sieve to be washed;
3): the molecular sieve separated from the reactor was washed and dried and the product phase was analyzed by X-ray diffraction.
Example 2: referring to FIG. 1, based on example 1, when the ratio of the reaction materials is Na2O：Al2O3：SiO2：H2The ratio of O is 7.5: 1: 5: 285 hours, obtaining pure B type molecular sieve;
the preparation method of the molecular sieve glass fiber VOC adsorbing material is the same as that of the example 1.
Example 3: referring to FIG. 1, based on example 1, when the ratio of the reaction materials is Na2O：Al2O3：SiO2：H2The ratio of O is 3.5: 1:2: at 175, 4A molecular sieve (large) and hydroxyfanalite (small) are obtained;
the preparation method of the molecular sieve glass fiber VOC adsorbing material is the same as that of the example 1.
Example 4: referring to FIG. 1, based on example 1, when the ratio of the reaction materials is Na2O：Al2O3：SiO2：H2The ratio of O was 3.63: 1:2: 187, yielding hydroxysquaraine (large amount) and 4A molecular sieve (small amount);
the preparation method of the molecular sieve glass fiber VOC adsorbing material is the same as that of the example 1.
Example 5: referring to FIG. 1, based on example 1, when the ratio of the reaction materials is Na2O：Al2O3：SiO2：H2The ratio of O is 5: 1: 4.22: 253, obtaining pure X-type molecular sieve;
the preparation method of the molecular sieve glass fiber VOC adsorbing material is the same as that of the example 1.
The working principle is as follows: the crystallized product obtained in the preparation process is analyzed and identified by X-ray diffraction to obtain phase composition and purity, and because the chemical compositions of various molecular sieves of different types are different, reaction materials with a certain proportion must be prepared, and the proportions of the reaction materials are different, so that the varieties of the obtained molecular sieves are also differentThe composition of the reaction material is the most main factor influencing the molecular sieve product and the synthesis process, the A-type molecular sieve is a zeolite variety which does not exist in nature, and the SiO of the A-type molecular sieve2/Al2O3The structural matrix of the A-type molecular sieve is formed by mutually connecting beta cages through oxygen bridges of four-membered rings, and the A-type molecular sieve is stable in a medium with slightly low alkalinity, so that a reaction material for synthesizing the A-type molecular sieve is prepared by the ideal proportion range of SiO2/Al2O3＝1.3-2.4，Na2O/SiO2＝0.8-3.0,H2O/Na235-200 of O, and the optimal mixture ratio is Na2O, Al2O3, SiO 2: h2O3.1: 2:185, this ratio being suitable for producing pure type a molecular sieve products;
SiO of hydroxysodalite2/Al2O3The structural matrix is also equal to 2, so that a hydroxysodalite mixed phase is easily generated during the synthesis of the 4A molecular sieve, but the beta cage is mutually connected through a four-membered ring and is stable in a medium with higher alkalinity, so that the hydroxysodalite is more favorably generated when the alkalinity in the reaction material ratio is increased, and the content of the hydroxysodalite is increased along with the increase of the alkalinity, so that the alkalinity of a system is strictly controlled during the synthesis of the 4A molecular sieve.
SiO of B type molecular sieve2/Al2O3Slightly higher than that of the type A molecular sieve, the catalyst is also stable in a medium with higher alkalinity, so if the alkalinity is high in a 4A molecular sieve synthesis system, and SiO is2:/Al2O3If the concentration is too high, a B-type molecular sieve heterogeneous phase is formed, thereby reducing the purity of the product.
The structure of the X-type molecular sieve is similar to that of a natural octahedral molecular sieve, the proportion range of reaction materials for synthesizing the X-type molecular sieve is narrow, and the pure molecular sieve SiO can be generated only in the following proportion range2/Al2O3＝3-5,Na2O/Si2O3＝1-1.5,H2O/Na235-60 of O, because of the SiO required for synthesizing X-type molecular sieve2/Al2O3In the range of 3 to 5, the value is higher, so that the X-type molecular sieve can not be generated in the synthesis system of the A-type molecular sieve;
sodium aluminate (NaAlO)2) Solution, solution,Sodium silicate (Na)2O·nSiO2) Solution, sodium hydroxide (NaOH) and liquid water (H)2O) is added into a reactor according to a preset proportion, and sodium aluminate (NaAlO)2) Solution, sodium silicate (Na)2O·nSiO2) Solution, sodium hydroxide (NaOH) and liquid water (H)2O) reacting in a reactor, separating to obtain mother liquor and a molecular sieve to be washed and dried, washing and drying the molecular sieve separated from the reactor, and analyzing the phase of the product by X-ray diffraction.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media having computer-usable program code embodied in the medium.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (8)
1. The molecular sieve glass fiber VOC adsorption material is characterized in that: the molecular sieve glass fiber VOC adsorption material is prepared from the following raw materials in parts by weight:
2. the molecular sieve glass fiber VOC adsorbing material of claim 1, wherein: said sodium aluminate (NaAlO)2) Na in solution2O content of 0.643-0.918mol/L, Al2O3The content is 0.274-0.359mo 1/L.
3. The molecular sieve glass fiber VOC adsorbing material of claim 1, wherein: the sodium silicate (Na)2O·nSiO2) Modulus n ═ SiO in solution2/Na2O (molar ratio), the modulus shows the composition of the sodium silicate, is an important parameter of the sodium silicate, and is 1.5-3.5.
4. The molecular sieve glass fiber VOC adsorbing material of claim 1, wherein: the sodium hydroxide (NaOH) is obtained from raw salt by an ion exchange membrane method, and the reaction equation is as follows: 2NaCl +2H2O→2NaOH+H2+Cl2。
5. The molecular sieve glass fiber VOC adsorbing material of claim 4, wherein: the sodium hydroxide (NaOH) is used for measuring the content of the effective components of the sodium hydroxide by fully dissolving a sodium hydroxide sample, titrating by using a standard hydrochloric acid solution and simultaneously using phenolphthalein as an indicator.
6. The molecular sieve glass fiber VOC adsorbing material of claim 3, wherein: the sodium silicate (Na)2O·nSiO2) By mixing soda ash (Na)2CO3) And quartz Sand (SiO) with the particle size of 0.180-0.250 mm (60-80 meshes)2) Uniformly mixing the raw materials in proportion, and feeding the mixture into a horseshoe flame kiln at 1450 toMelting at 1500 deg.C, and pressing into blocks or water quenching into granules.
7. The molecular sieve glass fiber VOC adsorbing material of claim 2, wherein: said sodium aluminate (NaAlO)2) Adding crude aluminum hydroxide into a sodium hydroxide solution at the temperature of 50-80 ℃, heating to 110 ℃, and preserving heat for 3 hours to obtain sodium aluminate (NaAlO)2) And (3) solution.
8. A method for preparing a molecular sieve glass fiber VOC adsorbing material, which uses the molecular sieve glass fiber VOC adsorbing material as claimed in any one of claims 1 to 7, and is characterized in that: the method comprises the following steps:
1): sodium aluminate (NaAlO)2) Solution, sodium silicate (Na)2O·nSiO2) Solution, sodium hydroxide (NaOH) and liquid water (H)2O) adding the mixture into a reactor according to a pre-configured proportion;
2): sodium aluminate (NaAlO)2) Solution, sodium silicate (Na)2O·nSiO2) Solution, sodium hydroxide (NaOH) and liquid water (H)2O) reacting in a reactor, and then separating to obtain mother liquor and a dried molecular sieve to be washed;
3): the molecular sieve separated from the reactor was washed and dried and the product phase was analyzed by X-ray diffraction.
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| CN115591518A (en) * | 2022-10-28 | 2023-01-13 | 南通大学（Cn） | A preparation method of molecular sieve@glass fiber block for VOCs purification |
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Application publication date: 20210924 |