CN102557093A - Additive applied to process for producing aluminum oxide by bayer method and preparation method of additive - Google Patents
Additive applied to process for producing aluminum oxide by bayer method and preparation method of additive Download PDFInfo
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- CN102557093A CN102557093A CN2012100514788A CN201210051478A CN102557093A CN 102557093 A CN102557093 A CN 102557093A CN 2012100514788 A CN2012100514788 A CN 2012100514788A CN 201210051478 A CN201210051478 A CN 201210051478A CN 102557093 A CN102557093 A CN 102557093A
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- 239000000654 additive Substances 0.000 title claims abstract description 62
- 230000000996 additive effect Effects 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title claims abstract description 46
- 238000002360 preparation method Methods 0.000 title claims abstract description 19
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 title description 30
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 84
- 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 36
- 238000003756 stirring Methods 0.000 claims abstract description 35
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 24
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 22
- 238000004519 manufacturing process Methods 0.000 claims abstract description 16
- 239000007788 liquid Substances 0.000 claims abstract description 13
- 239000000203 mixture Substances 0.000 claims abstract description 11
- 238000004131 Bayer process Methods 0.000 claims abstract description 8
- ASWLMDCYGHMPBP-UHFFFAOYSA-N OC(=O)C1=CC=CC=C1[SiH3] Chemical compound OC(=O)C1=CC=CC=C1[SiH3] ASWLMDCYGHMPBP-UHFFFAOYSA-N 0.000 claims abstract 3
- -1 silyl ring carboxylic acid Chemical class 0.000 claims abstract 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims description 13
- 238000005516 engineering process Methods 0.000 claims description 13
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 claims description 9
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 9
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims description 9
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 claims description 7
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 6
- 239000003995 emulsifying agent Substances 0.000 claims description 6
- 239000004094 surface-active agent Substances 0.000 claims description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 claims description 5
- KBPLFHHGFOOTCA-UHFFFAOYSA-N caprylic alcohol Natural products CCCCCCCCO KBPLFHHGFOOTCA-UHFFFAOYSA-N 0.000 claims description 4
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 239000004970 Chain extender Substances 0.000 claims description 3
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 claims description 3
- NWGKJDSIEKMTRX-AAZCQSIUSA-N Sorbitan monooleate Chemical compound CCCCCCCC\C=C/CCCCCCCC(=O)OC[C@@H](O)[C@H]1OC[C@H](O)[C@H]1O NWGKJDSIEKMTRX-AAZCQSIUSA-N 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- 229920001577 copolymer Polymers 0.000 claims description 3
- 239000003999 initiator Substances 0.000 claims description 3
- 235000010482 polyoxyethylene sorbitan monooleate Nutrition 0.000 claims description 3
- 229920000053 polysorbate 80 Polymers 0.000 claims description 3
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 claims description 3
- BWDBEAQIHAEVLV-UHFFFAOYSA-N 6-methylheptan-1-ol Chemical compound CC(C)CCCCCO BWDBEAQIHAEVLV-UHFFFAOYSA-N 0.000 claims description 2
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 claims description 2
- 229910021419 crystalline silicon Inorganic materials 0.000 claims description 2
- TVMXDCGIABBOFY-UHFFFAOYSA-N n-Octanol Natural products CCCCCCCC TVMXDCGIABBOFY-UHFFFAOYSA-N 0.000 claims description 2
- OZAIFHULBGXAKX-UHFFFAOYSA-N 2-(2-cyanopropan-2-yldiazenyl)-2-methylpropanenitrile Chemical compound N#CC(C)(C)N=NC(C)(C)C#N OZAIFHULBGXAKX-UHFFFAOYSA-N 0.000 claims 2
- JZUHIOJYCPIVLQ-UHFFFAOYSA-N 2-methylpentane-1,5-diamine Chemical compound NCC(C)CCCN JZUHIOJYCPIVLQ-UHFFFAOYSA-N 0.000 claims 2
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical group [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims 1
- 125000004432 carbon atom Chemical group C* 0.000 claims 1
- 150000001735 carboxylic acids Chemical class 0.000 claims 1
- 229910001873 dinitrogen Inorganic materials 0.000 claims 1
- IAXRQCIHMNUSNF-UHFFFAOYSA-N heptan-1-ol;octan-1-ol Chemical compound CCCCCCCO.CCCCCCCCO IAXRQCIHMNUSNF-UHFFFAOYSA-N 0.000 claims 1
- 238000006116 polymerization reaction Methods 0.000 claims 1
- 229910052710 silicon Inorganic materials 0.000 claims 1
- 238000010189 synthetic method Methods 0.000 claims 1
- 239000002245 particle Substances 0.000 abstract 1
- 239000000047 product Substances 0.000 description 37
- 238000000354 decomposition reaction Methods 0.000 description 23
- ANBBXQWFNXMHLD-UHFFFAOYSA-N aluminum;sodium;oxygen(2-) Chemical compound [O-2].[O-2].[Na+].[Al+3] ANBBXQWFNXMHLD-UHFFFAOYSA-N 0.000 description 20
- 229910001388 sodium aluminate Inorganic materials 0.000 description 20
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 14
- 229920002521 macromolecule Polymers 0.000 description 13
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 12
- 229910000077 silane Inorganic materials 0.000 description 12
- 238000013019 agitation Methods 0.000 description 11
- 239000000839 emulsion Substances 0.000 description 11
- 238000009775 high-speed stirring Methods 0.000 description 11
- WPYMKLBDIGXBTP-UHFFFAOYSA-N benzoic acid Chemical compound OC(=O)C1=CC=CC=C1 WPYMKLBDIGXBTP-UHFFFAOYSA-N 0.000 description 8
- 239000013078 crystal Substances 0.000 description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 5
- 229910052782 aluminium Inorganic materials 0.000 description 5
- 150000001875 compounds Chemical class 0.000 description 5
- 238000009835 boiling Methods 0.000 description 4
- 239000013543 active substance Substances 0.000 description 3
- 239000004411 aluminium Substances 0.000 description 3
- 229910001648 diaspore Inorganic materials 0.000 description 3
- 239000010419 fine particle Substances 0.000 description 3
- 239000006260 foam Substances 0.000 description 3
- BBMCTIGTTCKYKF-UHFFFAOYSA-N 1-heptanol Chemical compound CCCCCCCO BBMCTIGTTCKYKF-UHFFFAOYSA-N 0.000 description 2
- AIDLAEPHWROGFI-UHFFFAOYSA-N 2-methylbenzene-1,3-dicarboxylic acid Chemical compound CC1=C(C(O)=O)C=CC=C1C(O)=O AIDLAEPHWROGFI-UHFFFAOYSA-N 0.000 description 2
- FERIUCNNQQJTOY-UHFFFAOYSA-N Butyric acid Chemical compound CCCC(O)=O FERIUCNNQQJTOY-UHFFFAOYSA-N 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 238000006460 hydrolysis reaction Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- VVWRJUBEIPHGQF-UHFFFAOYSA-N propan-2-yl n-propan-2-yloxycarbonyliminocarbamate Chemical compound CC(C)OC(=O)N=NC(=O)OC(C)C VVWRJUBEIPHGQF-UHFFFAOYSA-N 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 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 description 1
- 229910001570 bauxite Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229960004365 benzoic acid Drugs 0.000 description 1
- 235000010233 benzoic acid Nutrition 0.000 description 1
- 229910001593 boehmite Inorganic materials 0.000 description 1
- 239000003518 caustics Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 238000004945 emulsification Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- FAHBNUUHRFUEAI-UHFFFAOYSA-M hydroxidooxidoaluminium Chemical compound O[Al]=O FAHBNUUHRFUEAI-UHFFFAOYSA-M 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920002401 polyacrylamide Polymers 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
本发明公开了一种用于拜尔法生产氧化铝工艺中的添加剂及其制备方法，其配方组成质量分数为：聚苯乙烯-丙烯酰胺-丙烯酸0.1～20%、硅烷基苯羧酸1～30%、醇1～20%、NaOH0.2～5%，余量为水，制备方法为将聚苯乙烯-丙烯酰胺-丙烯酸与水混合，在水浴30～55℃下搅拌溶解成均匀液体；再将硅烷基环羧酸与醇混合，搅拌溶解成溶液；再将上述所得物混合，在搅拌下，加入NaOH调整pH至8～11，高速搅拌30分钟后得产品，用于在拜耳法生产氧化铝过程中，可改善产品氧化铝的强度和粒度。
The invention discloses an additive used in the process of producing alumina by the Bayer process and a preparation method thereof. The composition mass fraction of the formula is: 0.1-20% of polystyrene-acrylamide-acrylic acid, 1-20% of silylbenzenecarboxylic acid 30%, alcohol 1-20%, NaOH 0.2-5%, and the balance is water. The preparation method is to mix polystyrene-acrylamide-acrylic acid with water, stir and dissolve in a water bath at 30-55°C to form a uniform liquid; Then mix the silyl ring carboxylic acid and alcohol, stir and dissolve into a solution; then mix the above-mentioned resultant, add NaOH under stirring to adjust the pH to 8-11, and stir at high speed for 30 minutes to obtain the product, which is used for Bayer process production During the alumina process, the strength and particle size of the product alumina can be improved.
Description
Technical field
The present invention relates to a kind of additive that is used for producing aluminium oxide by bayer technology and preparation method thereof.
Background technology
Aluminum oxide is the main raw material of Aluminum Electrolysis Production, also is the indispensable important source material of industry such as electronics, chemical industry, refractory materials, pottery simultaneously.In recent years, because the popularization of the automatic point feeding prebaked cell of electrolytic aluminium factory environmental protection and energy-conservation needs, particularly dry method gas cleaning and large-scale centre, strict requirement has also been proposed not only to the purity of aluminum oxide, and to the physical properties of aluminum oxide.
It is one of important procedure of alumina producing Bayer process that sodium aluminate solution crystal seed decomposes; China's Bayer process is a raw material with the diaspore type bauxite of indissoluble; Leaching condition is harsh, and the molecule of the dissolution fluid when caustic sodium concentration of solution is higher, and the aluminum oxide that makes and external typical sandy alumina product are relatively; Main drawback is that product strength is low, can not guarantee that fine particle content is in OK range simultaneously.Since " entry to WTO ", external granularity is good, and the quality oxide aluminium product that intensity is big impacts China aluminum oxide market, produces high-quality aluminum oxide so solve the sodium aluminate solution crystal seed decomposition, is the problem that China's aluminium industry presses for solution.
As far back as the eighties in last century, the research to three boehmite ore deposits is abroad just arranged, and the relevant decomposition additive that improves the quality of products is arranged, but practice shows that examples of such additives is also inapplicable with the technology of diaspore ore alumina producing Bayer process for China.And, be almost blank abroad to the research in this type of ore deposit.
During China " eight or five ", once concentrated the strength of the state-run large enterprises and the correlative study institute of Chalco, and tried hard to solve the problem that the powdery aluminum granularity is poor, intensity is low, but do not succeed with through changing the method for production technique.
Be used at present the additive that the bayer's process sodium aluminate solution crystal seed decomposes both at home and abroad; Be water-dispersion additive or oil soluble additive; All belong to the additive that improves aluminum oxide grain size; Though this kind additive adds the granularity that aluminum oxide can be improved in the back, can reduce sodium aluminate solution kind branch rate of decomposition or influence the intensity of aluminum oxide.And the additive of raising rate of decomposition often causes the refinement of product aluminum oxide.In addition, for China's diaspore ore, water-soluble additive and water dispersible additive, regular meeting is because its residual generation foam in decomposed solution, and influences other production workshop section.
Summary of the invention
The technical problem that the present invention will solve is: solve the problem of the additive existence of above-mentioned middle bayer's process sodium aluminate solution crystal seed decomposition, the present invention provides the emulsion-type of a kind of improved product strength that in the bayer's process aluminum oxide production process, uses and granularity to decompose additive and preparation method thereof.
The technical scheme that the present invention adopts:
A kind of additive that is used for producing aluminium oxide by bayer technology of the present invention, its prescription are formed massfraction and are:
PS-acrylamide-acrylicacid 0.1～20%
Siloyl group benzene carboxylic acid 1～30%
Alcohol 1～20%
NaOH 0.2～5%
Water surplus,
Wherein, the molecular weight of PS-acrylamide-acrylicacid is 500～1,600 ten thousand, and molecular formula is:
X, Y, the shared quantity mark of Z is: X is 10～50%; Z is 1～20%; All the other are Y.
Described a kind of additive that is used for producing aluminium oxide by bayer technology, the compound method of PS-acrylamide-acrylicacid is: 20 g acrylic amides are dissolved in the water, add 0.005～0.01g chainextender MPMD 2-methyl isophthalic acid; The 5-pentamethylene diamine is slowly poured in the four-hole boiling flask, slowly pours into 1.2g ST-80 emulsifying agent in the four-hole boiling flask; Again vinylbenzene is joined in the reaction system, feed nitrogen, add 0.010g Diisopropyl azodicarboxylate initiator; Under 15～35 ℃, 300r/min stir; React 1 h, stir down at 100r/min again, 3～5 hours completion polyreactions;
40%NaOH slowly to going in the above-mentioned solution, under 60 ℃, hydrolysis reaction 1 hour; After reacting end, it is 4～5 that the hydrochloric acid of adding 10% is adjusted pH, adds methyl alcohol to product and precipitates complete also separation, the toluene of products therefrom with 3 times of amounts is soaked again, and removes styrol copolymer, the dry PS-acrylamide-acrylicacid that gets;
Above-mentioned ST-80 emulsifying agent is compound by Span-80 and Tween-80, HLB=10;
The concrete consumption of vinylbenzene and 40%NaOH, according to X in the molecule, the percentage composition of Y and Z calculates:
Vinylbenzene consumption=acrylic amide quality * Z ÷ (100-Z) * 1.1;
40%NaOH consumption=acrylic amide quality * X ÷ (100-Z) ÷ acrylic molecules amount * NaOH molecular weight ÷ 40%.
Described a kind of additive that is used for producing aluminium oxide by bayer technology, siloyl group phenyl carboxylic acid: have the C-Si type tensio-active agent of 1 Siliciumatom, contain 1 phenyl ring shape structure in the molecule, the side chain carbon number is: 1～8 carboxylic acid, molecular formula is:
Wherein: n=1～7.
Described a kind of additive that is used for producing aluminium oxide by bayer technology, alcohol: carbon number is 3～9 a alcohol.
Described a kind of additive that is used for producing aluminium oxide by bayer technology, alcohol: propyl alcohol, Virahol, propyl carbinol, n-Octanol, isooctyl alcohol, n-Heptyl alcohol.
Described a kind of preparation method who is used for the additive of producing aluminium oxide by bayer technology may further comprise the steps:
(1) PS-acrylamide-acrylicacid is mixed with water, become uniform liquid in 30～55 ℃ of following stirring and dissolving of water-bath;
(2) silane basic ring carboxylic acid is mixed with alcohol, stirring and dissolving becomes solution;
(3) mix with 2 gains 1, under agitation, add NaOH adjustment pH to 7～11, high-speed stirring gets product after 30 minutes.
The beneficial effect that the present invention reaches: this technology is to utilize SEPIGEL 305 polymeric surface active agent and the silane basic ring carboxylic-acid surfactant blend that contains phenyl ring, can be under the situation that does not change the decomposition technique condition.Decomposing the starting stage, when interpolation concentration is 10～25ppm, can under the situation that guarantees the product aluminum oxide grain size, improve the intensity and the granularity of product aluminum oxide, and improve bayer's process sodium aluminate solution kind and divide rate of decomposition, concrete manifestation is following:
(1) prepares in the process of aluminum oxide in Bayer process; Do not change the sodium aluminate solution kind and divide the decomposition technique condition; Compound when utilization contains SEPIGEL 305 polymeric surface active agent and the siloyl group carboxylic-acid (as: 4-[4-(trimethyl silicane methyl) phenyl] butyric acid) of phenyl ring; Decomposing different periods uses, can improve intensity and granularity that the Bayer process sodium aluminate solution decomposition of crystal seed prepares aluminum oxide, be of value to the raising of bayer's process sodium aluminate solution kind branch rate of decomposition.
(2) contain the hydro-polyacrylamide macromolecular compound of benzene ring structure, have parents' structure, be the water soluble surfactant active; In group water solution; Can be mixed with siloyl group phenyl carboxylic acid surfactant, form stable emulsification system, make this type of macromolecule emulsion type additive; Promptly have the improved product aluminum oxide intensity of oil soluble additive and the advantage of granularity, also have the advantage that water-soluble additive can improve rate of decomposition.Simultaneously, utilize the hydrophobicity of phenyl ring in this macromolecular compound, make and decompose the surface that additive is prone to be adsorbed onto white lake, filter the back and break away from decomposing solution, be difficult for entering into decomposing solution, thereby guarantee that additive can not influence follow-up workshop section and produce.
(3) siloyl group phenyl carboxylic-acid tensio-active agent; Not only can reduce surface tension; Also has the effect that foam produces that suppresses simultaneously; Can improve the granularity and the intensity of product aluminum oxide after composite, and can eliminate or reduce the foam that tensio-active agent produces, thereby guarantee that additive can not influence follow-up workshop section and produce.
Description of drawings
Product A l (OH) when Fig. 1 is embodiment 2 empty appearance 60h
3The SEM photo.
Fig. 2 is product A l (OH) when adding additives decompose 60h among the embodiment 2
3The SEM photo.
Embodiment:
Embodiment 1The compound method of PS-acrylamide-acrylicacid
The 20g acrylic amide is dissolved in the 40 mL water, adds 0.008g chainextender MPMD (2-methyl isophthalic acid, 5-pentamethylene diamine); Slowly pour in the four-hole boiling flask, 1.2g ST-80 emulsifying agent is slowly poured in the four-hole boiling flask, again vinylbenzene is joined in the reaction system; Feed nitrogen 20min, add 0.010g Diisopropyl azodicarboxylate initiator, under 30 ℃ of temperature, 300r/min stir; Reacted 1 hour, and stirred down at 100r/min again, 4 hours completion polyreactions;
40%NaOH slowly to going in the above-mentioned solution, under 60 ℃, hydrolysis reaction 1 hour; After reaction finished, the hydrochloric acid of adding 10% adjustment pH was 4.5, added methyl alcohol to product deposition and fully also separated; Again the toluene of products therefrom with 3 times of amounts is soaked, remove styrol copolymer, the dry PS-acrylamide-acrylicacid that gets;
Above-mentioned ST-80 emulsifying agent is compound by Span-80 and Tween-80, HLB=10;
The concrete consumption of vinylbenzene and 40%NaOH, according to X in the molecule, the percentage composition of Y and Z calculates:
Vinylbenzene consumption=acrylic amide quality * Z ÷ (100-Z) * 1.1;
40%NaOH consumption=acrylic amide quality * X ÷ (100-Z) ÷ acrylic molecules amount * NaOH molecular weight ÷ 40%.
Embodiment 2Preferred additives prescription and preparation method thereof
The above-mentioned macromolecule emulsion type that in the bayer's process aluminum oxide production process, uses decomposes the preparation method of additive, may further comprise the steps:
(1) PS-acrylamide-acrylicacid is mixed with water, become uniform liquid in 45 ℃ of following stirring and dissolving of water-bath;
(2) silane basic ring carboxylic acid is mixed with alcohol, after stirring and dissolving becomes solution;
(3) step (1) is mixed with (2) gains, under agitation, add NaOH adjustment pH, high-speed stirring gets product after 30 minutes.
In bayer's process sodium aluminate solution initial decomposition, disposable add-on 25mg/L, laboratory result is seen table 2.
Can find out that from the test-results of table 2 compare with blank, additive can increase the median size of product, the fine particle content that reduces less than 45 μ m reduces, and improves product granularity; The abrasion index that adds the aluminum oxide of additive reduces approximately about 28% than blank, has improved product strength, and rate of decomposition slightly improves simultaneously.
Why additive can improve product A l
2O
3Intensity, mainly be because the product A l (OH) that additive decomposes sodium aluminate solution crystal seed
3Present ball-type structure (seeing Fig. 1 and 2), thereby strengthened roasting after product Al
2O
3Intensity.
Embodiment 3
The preferred additives prescription is seen table 3, and experimental result is seen table 4
The above-mentioned macromolecule emulsion type that in the bayer's process aluminum oxide production process, uses decomposes the preparation method of additive, may further comprise the steps:
(1) PS-acrylamide-acrylicacid is mixed with water, become uniform liquid in 45 ℃ of following stirring and dissolving of water-bath;
(2) silane basic ring carboxylic acid is mixed with alcohol, after stirring and dissolving becomes solution;
(3) step (1) is mixed with (2) gains, under agitation, add NaOH adjustment pH, high-speed stirring gets product after 30 minutes.
In bayer's process sodium aluminate solution initial decomposition, disposable add-on 25mg/L, laboratory result is seen table 4.
The above-mentioned macromolecule emulsion type that in the bayer's process aluminum oxide production process, uses decomposes the preparation method of additive, may further comprise the steps:
(1) PS-acrylamide-acrylicacid is mixed with water, become uniform liquid in 50 ℃ of following stirring and dissolving of water-bath;
(2) silane basic ring carboxylic acid is mixed with alcohol, after stirring and dissolving becomes solution;
(3) step (1) is mixed with (2) gains, under agitation, add NaOH adjustment pH, high-speed stirring gets product after 30 minutes.
In bayer's process sodium aluminate solution initial decomposition, disposable add-on 25mg/L, laboratory result is seen table 6.
Embodiment 5
The preferred additives prescription is seen table 7, and experimental result is seen table 8.
The above-mentioned macromolecule emulsion type that in the bayer's process aluminum oxide production process, uses decomposes the preparation method of additive, may further comprise the steps:
(1) PS-acrylamide-acrylicacid is mixed with water, become uniform liquid in 35 ℃ of following stirring and dissolving of water-bath;
(2) silane basic ring carboxylic acid is mixed with alcohol, after stirring and dissolving becomes solution;
(3) step (1) is mixed with (2) gains, under agitation, add NaOH adjustment pH, high-speed stirring gets product after 30 minutes.
In bayer's process sodium aluminate solution initial decomposition, disposable add-on 25mg/L, laboratory result is seen table 8.
Embodiment 6
The preferred additives prescription is seen table 9, and experimental result is seen table 10.
The above-mentioned macromolecule emulsion type that in the bayer's process aluminum oxide production process, uses decomposes the preparation method of additive, may further comprise the steps:
(1) PS-acrylamide-acrylicacid is mixed with water, become uniform liquid in 45 ℃ of following stirring and dissolving of water-bath;
(2) silane basic ring carboxylic acid is mixed with alcohol, after stirring and dissolving becomes solution;
(3) step (1) is mixed with (2) gains, under agitation, add NaOH adjustment pH, high-speed stirring gets product after 30 minutes.
In bayer's process sodium aluminate solution initial decomposition, disposable add-on 25mg/L, laboratory result is seen table 10.
Embodiment 7
The preferred additives prescription is seen table 11, and experimental result is seen table 12.
The above-mentioned macromolecule emulsion type that in the bayer's process aluminum oxide production process, uses decomposes the preparation method of additive, may further comprise the steps:
(1) PS-acrylamide-acrylicacid is mixed with water, become uniform liquid in 35 ℃ of following stirring and dissolving of water-bath;
(2) silane basic ring carboxylic acid is mixed with alcohol, after stirring and dissolving becomes solution;
(3) step (1) is mixed with (2) gains, under agitation, add NaOH adjustment pH, high-speed stirring gets product after 30 minutes.
In bayer's process sodium aluminate solution initial decomposition, disposable add-on 25mg/L, laboratory result is seen table 12.
Embodiment 8
The preferred additives prescription is seen table 13, and experimental result is seen table 14.
The above-mentioned macromolecule emulsion type that in the bayer's process aluminum oxide production process, uses decomposes the preparation method of additive, may further comprise the steps:
(1) PS-acrylamide-acrylicacid is mixed with water, become uniform liquid in 35 ℃ of following stirring and dissolving of water-bath;
(2) silane basic ring carboxylic acid is mixed with alcohol, after stirring and dissolving becomes solution;
(3) step (1) is mixed with (2) gains, under agitation, add NaOH adjustment pH, high-speed stirring gets product after 30 minutes.
In bayer's process sodium aluminate solution initial decomposition, disposable add-on 25mg/L, laboratory result is seen table 14.
Table 14 preferred additives is to product A l
2O
3The influence of intensity and granularity
Embodiment 9
The preferred additives prescription is seen table 15, and experimental result is seen table 16.
Table 15 preferred additives prescription
The above-mentioned macromolecule emulsion type that in the bayer's process aluminum oxide production process, uses decomposes the preparation method of additive, may further comprise the steps:
(1) PS-acrylamide-acrylicacid is mixed with water, become uniform liquid in 35 ℃ of following stirring and dissolving of water-bath;
(2) silane basic ring carboxylic acid is mixed with alcohol, after stirring and dissolving becomes solution;
(3) step (1) is mixed with (2) gains, under agitation, add NaOH adjustment pH, high-speed stirring gets product after 30 minutes.
In bayer's process sodium aluminate solution initial decomposition, disposable add-on 25mg/L, laboratory result is seen table 16.
Embodiment 10
The preferred additives prescription is seen table 17, and experimental result is seen table 18.
The above-mentioned macromolecule emulsion type that in the bayer's process aluminum oxide production process, uses decomposes the preparation method of additive, may further comprise the steps:
(1) PS-acrylamide-acrylicacid is mixed with water, become uniform liquid in 35 ℃ of following stirring and dissolving of water-bath;
(2) silane basic ring carboxylic acid is mixed with alcohol, after stirring and dissolving becomes solution;
(3) step (1) is mixed with (2) gains, under agitation, add NaOH adjustment pH, high-speed stirring gets product after 30 minutes.
In bayer's process sodium aluminate solution initial decomposition, disposable add-on 25mg/L, laboratory result is seen table 18.
Embodiment 11
The preferred additives prescription is seen table 19, and experimental result is seen table 20.
The above-mentioned macromolecule emulsion type that in the bayer's process aluminum oxide production process, uses decomposes the preparation method of additive, may further comprise the steps:
(1) PS-acrylamide-acrylicacid is mixed with water, become uniform liquid in 35 ℃ of following stirring and dissolving of water-bath;
(2) silane basic ring carboxylic acid is mixed with alcohol, after stirring and dissolving becomes solution;
(3) step (1) is mixed with (2) gains, under agitation, add NaOH adjustment pH, high-speed stirring gets product after 30 minutes.
In bayer's process sodium aluminate solution initial decomposition, disposable add-on 25mg/L, laboratory result is seen table 20.
Can find out that from table 3～table 20 compare with blank, additive can increase the median size of product, the fine particle content that reduces less than 45 μ m reduces, and improves product granularity; The abrasion index of low about aluminum oxide has been improved product strength, and rate of decomposition slightly improves simultaneously.
Claims (6)
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103342722A (en) * | 2013-07-26 | 2013-10-09 | 台山市新宁制药有限公司 | Preparation method of alkaline bismuth gallate |
| CN111153423A (en) * | 2020-01-03 | 2020-05-15 | 江西理工大学 | Composite inhibitor containing PAH (polycyclic aromatic Hydroquinone) and preparation method and application thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0327660A1 (en) * | 1988-02-11 | 1989-08-16 | VAW Aluminium AG | Process for the production of fillers and fire-preventing materials based on hydrargillite-type aluminium hydroxide |
| US20060292050A1 (en) * | 2005-06-23 | 2006-12-28 | Malito John T | Composition and method for improved aluminum hydroxide production |
| CN1888096A (en) * | 2006-07-18 | 2007-01-03 | 中国铝业股份有限公司 | Prepn process of Bayer process leaching additive |
| CN1911808A (en) * | 2006-09-14 | 2007-02-14 | 中国铝业股份有限公司 | Method for decomposing ultrahigh concentration sodium aluminate solution |
-
2012
- 2012-03-01 CN CN201210051478.8A patent/CN102557093B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0327660A1 (en) * | 1988-02-11 | 1989-08-16 | VAW Aluminium AG | Process for the production of fillers and fire-preventing materials based on hydrargillite-type aluminium hydroxide |
| US20060292050A1 (en) * | 2005-06-23 | 2006-12-28 | Malito John T | Composition and method for improved aluminum hydroxide production |
| CN1888096A (en) * | 2006-07-18 | 2007-01-03 | 中国铝业股份有限公司 | Prepn process of Bayer process leaching additive |
| CN1911808A (en) * | 2006-09-14 | 2007-02-14 | 中国铝业股份有限公司 | Method for decomposing ultrahigh concentration sodium aluminate solution |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103342722A (en) * | 2013-07-26 | 2013-10-09 | 台山市新宁制药有限公司 | Preparation method of alkaline bismuth gallate |
| CN111153423A (en) * | 2020-01-03 | 2020-05-15 | 江西理工大学 | Composite inhibitor containing PAH (polycyclic aromatic Hydroquinone) and preparation method and application thereof |
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| CN102557093B (en) | 2015-03-18 |
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