CN1287973A - Method for preparing super fine aluminium hydroxide - Google Patents
Method for preparing super fine aluminium hydroxide Download PDFInfo
- Publication number
- CN1287973A CN1287973A CN 00130250 CN00130250A CN1287973A CN 1287973 A CN1287973 A CN 1287973A CN 00130250 CN00130250 CN 00130250 CN 00130250 A CN00130250 A CN 00130250A CN 1287973 A CN1287973 A CN 1287973A
- Authority
- CN
- China
- Prior art keywords
- aluminium hydroxide
- slurries
- carbon
- super fine
- sodium aluminate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 title claims abstract description 44
- 229910021502 aluminium hydroxide Inorganic materials 0.000 title claims abstract description 41
- 238000000034 method Methods 0.000 title claims abstract description 35
- 239000002002 slurry Substances 0.000 claims abstract description 34
- 239000007787 solid Substances 0.000 claims abstract description 16
- ANBBXQWFNXMHLD-UHFFFAOYSA-N aluminum;sodium;oxygen(2-) Chemical compound [O-2].[O-2].[Na+].[Al+3] ANBBXQWFNXMHLD-UHFFFAOYSA-N 0.000 claims abstract description 13
- 229910001388 sodium aluminate Inorganic materials 0.000 claims abstract description 13
- 230000008569 process Effects 0.000 claims abstract description 12
- SMYKVLBUSSNXMV-UHFFFAOYSA-K aluminum;trihydroxide;hydrate Chemical compound O.[OH-].[OH-].[OH-].[Al+3] SMYKVLBUSSNXMV-UHFFFAOYSA-K 0.000 claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 8
- 238000001816 cooling Methods 0.000 claims abstract description 6
- 238000005406 washing Methods 0.000 claims abstract description 4
- 229940024545 aluminum hydroxide Drugs 0.000 claims description 40
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 20
- 229910052799 carbon Inorganic materials 0.000 claims description 20
- 238000000354 decomposition reaction Methods 0.000 claims description 19
- 239000000243 solution Substances 0.000 claims description 18
- 238000004519 manufacturing process Methods 0.000 claims description 12
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 11
- FAHBNUUHRFUEAI-UHFFFAOYSA-M hydroxidooxidoaluminium Chemical compound O[Al]=O FAHBNUUHRFUEAI-UHFFFAOYSA-M 0.000 claims description 11
- 229940024546 aluminum hydroxide gel Drugs 0.000 claims description 9
- 238000000926 separation method Methods 0.000 claims description 9
- 238000003756 stirring Methods 0.000 claims description 9
- 238000010790 dilution Methods 0.000 claims description 4
- 239000012895 dilution Substances 0.000 claims description 4
- 239000004927 clay Substances 0.000 claims description 3
- 239000006210 lotion Substances 0.000 claims description 3
- 238000001556 precipitation Methods 0.000 claims description 3
- 239000013078 crystal Substances 0.000 abstract description 12
- 239000007788 liquid Substances 0.000 abstract description 7
- 238000001035 drying Methods 0.000 abstract description 2
- 239000012530 fluid Substances 0.000 abstract 2
- 238000007865 diluting Methods 0.000 abstract 1
- 239000000126 substance Substances 0.000 description 4
- 238000009776 industrial production Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 210000000582 semen Anatomy 0.000 description 3
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000003518 caustics Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000008450 motivation Effects 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 1
- 235000017557 sodium bicarbonate Nutrition 0.000 description 1
- 239000011882 ultra-fine particle Substances 0.000 description 1
Abstract
The present invention relates to technology of producing superfine aluminium hydroxide and is characterized by the process including three subsequent procedures of using sodium aluminate solution to prepare active crystal seeds, decomposing superfine aluminium hydroxide slurry fluid and separating solid from liquid. The preparabon procedure of super fine crystal seeds from sodium aluminate solution includes diluting and cooling sodium aluminate solution, decomposing and forming aluminium hydroxide gel slurry fluid and the procedure of separating solid from liquid includes separating solid and liquid, adding water and washing and over drying to obtain superfine aluminium hydroxide.
Description
The present invention relates to a kind of technology that adopts kind of point-score to prepare ultrafine aluminium hydroxide, specifically adopt aluminic acid to receive the aluminum hydroxide gel of solution carbon method production and make crystal seed, stir decomposition method with seed and prepare ultrafine aluminium hydroxide.
Ultrafine aluminium hydroxide is meant that generally particle diameter is even, and median size is less than the ultrafine particle of 1 μ m, and it is a kind of novel coating pigment, is used as color filler and surface coating material usually in papermaking, its application prospect very sight.The manufacture method of ultrafine aluminium hydroxide, once open report had following two kinds: the one, receive solution and sodium bicarbonate with aluminic acid and carry out neutralization reaction, gained solution is treated and directly add aluminic acid and receive and decompose in the solution, separate out ultra-fine crystal seed, adding aluminic acid again receives and decomposes in the solution, finally obtain ultrafine aluminium hydroxide, the ultrafine aluminium hydroxide median size that this method makes is at 2 μ m.Another kind is industrial aluminium hydroxide to be calcined and vibration grinds, make it activation after, as ultra-fine crystal seed, add aluminic acid to and receive to stir in the solution and decompose, thereby obtain ultrafine aluminium hydroxide, the ultrafine aluminium hydroxide median size that this method makes is about 0.85 μ m.Above-mentioned two kinds of ultrafine aluminium hydroxide production methods, the preparation process more complicated of its ultra-fine crystal seed, industrial production are difficult to control.
In view of this, how to provide the technology of a kind of production ultrafine aluminium hydroxide, it is low to have a cost, and method is easy, is suitable for industrial production, and the present invention grinds wound motivation place just.
Designer of the present invention, does a brand-new design and constitutes on the basis of feasibility study repeatedly by means of being engaged in the practical experience that metallurgical technology is researched and produced processing and other fields for many years, gets generation of the present invention eventually.
At the deficiencies in the prior art, the purpose of this invention is to provide a kind method for preparing super fine aluminium hydroxide, have industrial production and be easy to realize that manufacturing processed is simple, the characteristics that quality product is easy to control, the product that makes is with a wide range of applications.
Purpose of the present invention can be by following realization, production ultrafine aluminium hydroxide technology of the present invention is characterized in that whole production stream becomes to be divided into successively three operations: the sodium aluminate solution carbon method produces active seed, plant point-score prepares the ultrafine aluminium hydroxide slurries and decomposes that slurries are liquid-solid to be separated; Wherein the sodium aluminate solution carbon method is produced ultra-fine crystal seed flow process and is comprised sodium aluminate solution dilution cooling, carries out the carbon branch then and be decomposed to form the aluminum hydroxide gel slurries in carbon divides groove; Enter ultrafine aluminium hydroxide slurries decomposition process then; Decompose the liquid-solid separation process of slurries and comprise liquid-solid separation, add the water agitator treating, dry then and obtain ultrafine aluminium hydroxide.
The present invention is further characterized in that sodium aluminate solution dilution cooling is to cool off through plate-type heat exchanger; Cooled aluminic acid is received solution and is entered carbon and divide and carry out in the groove adding white clay washing lotion or water adjustment earlier before carbon divide to decompose, and making its alumina content is 40-60 gram/liter, α k:1.4～1.6, and temperature is less than 40 ℃; The time of carrying out the carbon decomposition in carbon divides groove was controlled at 15～30 minutes, and the aluminum hydroxide gel slurries that obtain after the decomposition are controlled at PH=8～10; The aluminum hydroxide slurry decomposition process is controlled at 55 ℃ with temperature, alumina content 80～100 gram/liters, and α k:1.4～1.6 are adopted the slurry formula to be stirred in and are stirred decomposition in the seed precipitation tank, and stirring the resolving time is 8～10 hours; The water agitator treating that adds that decomposes in the liquid-solid separation process of slurries is three backflushs.
Advantage of the present invention is that technology is simple, and production process is easy to control, constant product quality, and the production efficiency height, cost is low.
Fig. 1 is a process flow sheet of the present invention.
Be described in further detail by reference to the accompanying drawings technological process of the present invention:
(1) aluminic acid is received the solution carbon method and is produced ultra-fine crystal seed
The sintering process sodium aluminate refined liquid after the heat-exchangers of the plate type cooling, adds white clay washing lotion or water adjustment, making its alumina content is 40-60 g/l, α k:1.4～1.6, and temperature is less than 40 ℃, within carbon divides groove, adopt the slurry formula to stir, pass into fast concentration and be 35～40% CO2Gas, the caustic alkali in the seminal fluid and CO2Reaction has increased aluminic acid and has received the degree of supersaturation of solution aluminium hydroxide separated out; Resolving time is controlled at 15～30 minutes, obtains at last the gel aluminum hydroxide slurry of PH=8～10.
(2) seed of ultrafine aluminium hydroxide slurries stirs and decomposes
With above-mentioned gel aluminum hydroxide, without any processing, join (80～100 g/ls of its alumina contents in the sintering process sodium aluminate refined liquid, α k:1.4～1.6), temperature 55 adopts the slurry formula to be stirred in and stirs decomposition in the seed precipitation tank, aluminium oxide in the seminal fluid parsed in the effect of seed in lower minute, through 8～10 hours decomposition, can obtain average grain diameter less than the ultrafine aluminium hydroxide slurries of 1 μ m.
(3) decompose the liquid-solid separation of slurries
After the ultrafine aluminium hydroxide slurries separated through filter, again through three backflushs, the attached alkali of flush away was with obtaining the ultrafine aluminium hydroxide finished product after the drying machine oven dry.
Further specify the present invention below in conjunction with embodiment
Example 1 aluminic acid is received refined liquid after adjusting, and its composition is: alumina content 40-60 gram/liter, and α k:1.4～1.6, temperature is less than 40 ℃, and feeding concentration is 35～40% CO
2Gas 20 minutes, 1～5 liter/hour of air flow obtains the aluminum hydroxide gel slurries; Aluminic acid is received refined liquid, and its composition is: alumina content 98 gram/liters, α k=1.53, add the aluminum hydroxide gel slurries, crystal seed coefficient 0.1～0.3% decomposes 55 ℃ of initial temperatures, 40 ℃ of final temperatures, decompose 10 hours time length, aluminum oxide rate of decomposition 70%, gained ultrafine aluminium hydroxide slurries carry out liquid-solid separation, and solid is cleaned oven dry, be the finished product ultrafine aluminium hydroxide, its physical and chemical performance index sees Table 1.
Example 2: the kind of this example Change Example 1 is divided decomposition condition, be that aluminum hydroxide gel slurries production method is with example 1, when kind of point-score stirs decomposition, change decomposition into two sections decomposition, one section decomposition divides the aluminum hydroxide gel slurries to do one section with carbon and decomposes crystal seed, crystal seed coefficient 10～15%, 2 hours resolving times, obtain ultrafine aluminium hydroxide seed slurries, join two sections again and decompose in the seminal fluid, crystal seed coefficient 0.1～0.3% continues to decompose 8 hours, aluminum oxide rate of decomposition 70%, obtain the ultrafine aluminium hydroxide slurries, carry out liquid-solid separation, after solid is cleaned oven dry, be the finished product ultrafine aluminium hydroxide, its physical and chemical performance index sees Table 1.
Physical and chemical performance index table 1
| Example | Chemical Composition (%) | Physicals | ||||||
| Al 2O 3 | SiO 2 | Fe 2O 3 | Na 2O | Igloss | Particle diameter＜2 μ m (%) | D50 μm | Whiteness (%) | |
| 1 | ≥64 | 0.015 | 0.005 | 0.21 | 34.5 | 98 | 0.85 | 99.5 |
| 2 | ≥64 | 0.017 | 0.005 | 0.23 | 34.5 | 98 | 0.85 | 99.7 |
In sum, the present invention can utilize simple technical flow, makes the production process of ultrafine aluminium hydroxide be easy to control, and technology is simple, and adult is low, the efficient height.Obviously the present invention is the new design of a kind of novelty, progress and dark tool practicality.The above is specific embodiments of the invention and the know-why used, if the equivalence of doing according to conception of the present invention changes, when the function that it produced does not exceed spiritual that specification sheets and accompanying drawing contain yet, all should be within the scope of the invention, explanation hereby.
Claims (6)
1, kind method for preparing super fine aluminium hydroxide is characterized in that the whole production flow process is divided into three operations successively: the sodium aluminate solution carbon method produces active seed, plant point-score prepares the ultrafine aluminium hydroxide slurries and decomposes that slurries are liquid-solid to be separated; Wherein the sodium aluminate solution carbon method is produced the active seed flow process and is comprised sodium aluminate solution dilution cooling, carries out the carbon branch then and be decomposed to form the aluminum hydroxide gel slurries in carbon divides groove; Enter ultrafine aluminium hydroxide gel slurries decomposition process then; Decompose the liquid-solid separation process of slurries and comprise liquid-solid separation, add the water agitator treating, dry then and obtain ultrafine aluminium hydroxide.
2, according to claim a kind of method for preparing super fine aluminium hydroxide is characterized in that sodium aluminate solution dilution cooling is to cool off through plate-type heat exchanger.
3, according to claim 1 and 2 kind of method for preparing super fine aluminium hydroxide, it is characterized in that cooled aluminic acid receives solution and enter carbon and divide and carry out in the groove adding white clay washing lotion or water adjustment earlier before carbon divide to decompose, making its alumina content is 40-60 gram/liter, α k:1.4～1.6, temperature is less than 40 ℃.
4, according to claim a kind of method for preparing super fine aluminium hydroxide is characterized in that carrying out carbon and divides the time of decomposing to be controlled at 15～30 minutes in carbon divides groove, the aluminum hydroxide gel slurries that obtain after the decomposition are controlled at PH=8～10.
5, according to claim a kind of method for preparing super fine aluminium hydroxide, it is characterized in that ultrafine aluminium hydroxide slurries decomposition process is controlled at 55 ℃ with temperature, alumina content 80～100 gram/liters, α k:1.4～1.6, adopt the slurry formula to be stirred in and stir decomposition in the seed precipitation tank, stirring the resolving time is 8～10 hours.
6, according to claim a kind of method for preparing super fine aluminium hydroxide, the water agitator treating that adds that it is characterized in that decomposing in the liquid-solid separation process of slurries is three backflushs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00130250A CN1113037C (en) | 2000-11-01 | 2000-11-01 | Method for preparing super fine aluminium hydroxide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00130250A CN1113037C (en) | 2000-11-01 | 2000-11-01 | Method for preparing super fine aluminium hydroxide |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1287973A true CN1287973A (en) | 2001-03-21 |
| CN1113037C CN1113037C (en) | 2003-07-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN00130250A Expired - Lifetime CN1113037C (en) | 2000-11-01 | 2000-11-01 | Method for preparing super fine aluminium hydroxide |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1113037C (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100378000C (en) * | 2006-08-25 | 2008-04-02 | 中国铝业股份有限公司 | Method for producing micropowder aluminium hydroxide by neutralization method |
| CN100411991C (en) * | 2006-09-29 | 2008-08-20 | 中国铝业股份有限公司 | Preparation method of aluminium hydroxide micro powder |
| CN102515224A (en) * | 2011-12-14 | 2012-06-27 | 河津市晋铝大株化工有限公司 | Method for producing aluminum hydroxide powder |
| CN105776269A (en) * | 2016-03-24 | 2016-07-20 | 中国铝业股份有限公司 | Micro-powder aluminum hydroxide preparation method and device and micro-powder aluminum hydroxide |
| CN108423699A (en) * | 2018-04-20 | 2018-08-21 | 淄博鹏丰铝业有限公司 | A kind of preparation method of lithium battery diaphragm coated by special aluminium oxide |
| CN109704376A (en) * | 2019-01-22 | 2019-05-03 | 湖南绿脉环保科技有限公司 | A kind of Bayer process coproduction chemical aluminum oxide production method |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85100161A (en) * | 1985-04-01 | 1986-07-30 | 山东省铝厂 | Carbonating technology (CO 2Method) produces pseudo-boehmite |
| CN1011882B (en) * | 1985-07-06 | 1991-03-06 | 贵州铝厂 | Prodn. sandy aluminium hydroxide |
-
2000
- 2000-11-01 CN CN00130250A patent/CN1113037C/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100378000C (en) * | 2006-08-25 | 2008-04-02 | 中国铝业股份有限公司 | Method for producing micropowder aluminium hydroxide by neutralization method |
| CN100411991C (en) * | 2006-09-29 | 2008-08-20 | 中国铝业股份有限公司 | Preparation method of aluminium hydroxide micro powder |
| CN102515224A (en) * | 2011-12-14 | 2012-06-27 | 河津市晋铝大株化工有限公司 | Method for producing aluminum hydroxide powder |
| CN105776269A (en) * | 2016-03-24 | 2016-07-20 | 中国铝业股份有限公司 | Micro-powder aluminum hydroxide preparation method and device and micro-powder aluminum hydroxide |
| CN108423699A (en) * | 2018-04-20 | 2018-08-21 | 淄博鹏丰铝业有限公司 | A kind of preparation method of lithium battery diaphragm coated by special aluminium oxide |
| CN108423699B (en) * | 2018-04-20 | 2020-01-07 | 淄博鹏丰铝业有限公司 | Preparation method of lithium battery diaphragm coated with special alumina |
| CN109704376A (en) * | 2019-01-22 | 2019-05-03 | 湖南绿脉环保科技有限公司 | A kind of Bayer process coproduction chemical aluminum oxide production method |
| CN109704376B (en) * | 2019-01-22 | 2021-09-17 | 湖南绿脉环保科技股份有限公司 | Bayer process production method for co-producing chemical aluminum oxide |
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| Publication number | Publication date |
|---|---|
| CN1113037C (en) | 2003-07-02 |
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Owner name: CHINESE ALUMINIUM CO., LTD. Free format text: FORMER OWNER: ZHONGZHOU ALUMINIUM PLANT, CHINESE CHANGCHENG ALUMINIUM INDUSTRY GROUP Effective date: 20020404 |
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Effective date of registration: 20020404 Address after: 100814 No. 12 Fuxing Road, Beijing Applicant after: Aluminum Corporation of China Limited Address before: 454174 Jiaozuo City, Henan Province Applicant before: Zhongzhou Aluminium Plant, Chinese Changcheng Aluminium Industry Group |
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Granted publication date: 20030702 |