CN101837999B - Preparation method of Beta-type aluminum hydroxide - Google Patents
Preparation method of Beta-type aluminum hydroxide Download PDFInfo
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- CN101837999B CN101837999B CN2010101962956A CN201010196295A CN101837999B CN 101837999 B CN101837999 B CN 101837999B CN 2010101962956 A CN2010101962956 A CN 2010101962956A CN 201010196295 A CN201010196295 A CN 201010196295A CN 101837999 B CN101837999 B CN 101837999B
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- Prior art keywords
- aluminum hydroxide
- beta
- type aluminum
- raw material
- preparation
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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 31
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- 238000000034 method Methods 0.000 claims abstract description 28
- 239000002994 raw material Substances 0.000 claims abstract description 18
- 239000012452 mother liquor Substances 0.000 claims abstract description 14
- 238000005245 sintering Methods 0.000 claims abstract description 9
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 8
- 238000001914 filtration Methods 0.000 claims abstract description 7
- 238000005406 washing Methods 0.000 claims description 20
- 238000000354 decomposition reaction Methods 0.000 claims description 13
- 238000001556 precipitation Methods 0.000 claims description 12
- 238000005273 aeration Methods 0.000 claims description 11
- 239000004571 lime Substances 0.000 claims description 11
- 239000003518 caustics Substances 0.000 claims description 10
- 235000011089 carbon dioxide Nutrition 0.000 claims description 6
- 239000000706 filtrate Substances 0.000 claims description 4
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 2
- 235000019738 Limestone Nutrition 0.000 claims description 2
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 2
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 2
- 239000004411 aluminium Substances 0.000 claims description 2
- 239000006028 limestone Substances 0.000 claims description 2
- 230000003647 oxidation Effects 0.000 claims description 2
- 238000007254 oxidation reaction Methods 0.000 claims description 2
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 2
- 239000002244 precipitate Substances 0.000 claims description 2
- 239000000047 product Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 229910002092 carbon dioxide Inorganic materials 0.000 abstract 1
- 239000001569 carbon dioxide Substances 0.000 abstract 1
- 238000002156 mixing Methods 0.000 abstract 1
- 210000002966 serum Anatomy 0.000 abstract 1
- ANBBXQWFNXMHLD-UHFFFAOYSA-N aluminum;sodium;oxygen(2-) Chemical compound [O-2].[O-2].[Na+].[Al+3] ANBBXQWFNXMHLD-UHFFFAOYSA-N 0.000 description 12
- 229910001388 sodium aluminate Inorganic materials 0.000 description 12
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 10
- 241000209094 Oryza Species 0.000 description 9
- 235000007164 Oryza sativa Nutrition 0.000 description 9
- 235000009566 rice Nutrition 0.000 description 9
- 238000000926 separation method Methods 0.000 description 9
- 239000002002 slurry Substances 0.000 description 9
- 239000007787 solid Substances 0.000 description 9
- 239000000126 substance Substances 0.000 description 8
- 238000009423 ventilation Methods 0.000 description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- Y02P20/142—
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- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
The invention discloses a preparation method of Beta-type aluminum hydroxide; seed mother liquor serves as the raw material, carbon dioxide gas is fed in to neutralize the raw material, serum is filtered, precipitated, washed and dried to obtain the Beta-type aluminum hydroxide. The preparation method takes the seed mother liquor obtained from filtering seed aluminum hydroxide through a sintering method, the produced Beta-type aluminum hydroxide has high purity and large specific surface area; and the mother liquor is returned to the preparation of the aluminum hydroxide through the sintering method to participate in mixing, so that the circulation efficiency is improved and the main production cost is reduced.
Description
Technical field
The present invention relates to the production of aluminum hydroxide field, particularly a kind of preparation method of Beta-type aluminum hydroxide.
Background technology
The working method of Beta-type aluminum hydroxide has a variety of (comprising the related invention patent of having applied for), but all raw materials of above method are sodium aluminate solution, needs to filter cooling, and raw materials cost is higher.
Summary of the invention
One of the object of the invention provide a kind of utilize the sintering process kind divide behind the white lake the filtering seed precipitation solution method of producing Beta-type aluminum hydroxide.
For realizing above-mentioned purpose, the technical scheme that the present invention adopts is:
A kind of preparation method of Beta-type aluminum hydroxide is a raw material with the seed precipitation solution, feeds in the dioxide gas to separate with raw material, and gained is dried after decomposing dope filtration, washing of precipitate, obtains Beta-type aluminum hydroxide.
Said raw material seed precipitation solution is the mother liquor behind kind of the branch white lake, and α k is 2.5-4.5, and aluminum oxide is residual to be 35-60g/l.
Carbonic acid gas in the said feeding raw material is the sub product that industrial calcined limestone is produced white lime, and its purity is 20～50%; Feeding speed is 5～200m
3/ hour .m
3Solution, aeration time 1～6 hour.
Temperature is controlled at 20 ℃～60 ℃ when feeding the carbonic acid gas decomposition in the said raw material.
Feeding carbonic acid gas decomposition completion rear oxidation aluminium is residual in the said raw material is not more than 10%.
The washings of said filtrate filtered and washing precipitation returns sintering process and prepares in the white lake process, participates in batching.
The purity of gained Beta-type aluminum hydroxide is high, and specific surface is big, and granularity can be controlled as required within the specific limits.
Method provided by the invention, utilize the sintering process kind to divide white lake after filtering seed precipitation solution be raw material, the Beta-type aluminum hydroxide purity of production is high; Specific surface is big; The mother liquid obtained sintering process of returning prepares participation batching in the white lake process, improves cycle efficiency, has reduced production cost.
Description of drawings
Fig. 1 is the production Beta-type aluminum hydroxide process flow sheet that the embodiment of the invention provides.
The object of the invention, function and advantage will combine embodiment, further specify with reference to accompanying drawing.
Embodiment
The production Beta-type aluminum hydroxide technology that the embodiment of the invention provides is following: at first, by the refined sodium aluminate solution of alkali-lime sinter process gained, its alumina content is 90～110g/l, solution caustic ratio (a
k) 1.4～1.6.Refined sodium aluminate solution to gained carries out kind of a branch under 40～90 ℃ then, plants and divides 6～48 hours time.Obtain kind of a branch white lake behind the filtration washing, filtering the remaining mother liquor in back is seed precipitation solution.Its alumina content is 35～60g/l, is cooled to below 50 ℃ to feed concentration and is 20～50% CO
2Gas, gas feeding speed is 5～200 meters
3/ hour rice
3Solution, aeration time 1～6 hour, rate of decomposition 80～95%, gained decomposes slurries and directly carries out liquid-solid separation, washing and oven dry, and the Beta-type aluminum hydroxide purity that obtains is greater than 93%.
Technology of the present invention is under moderate temperature conditions, adopts big CO
2The carbon that tolerance is carried out seed precipitation solution divide to decompose, and has replaced the sodium aluminate solution in the existing method, and raw material do not need to filter, and solution temperature and temperature required difference are little.Also do not need significantly to lower the temperature.The washings of filtrate filtered and washing precipitation returns sintering process and prepares in the white lake process, participates in batching and recycles.Process flow sheet as shown in Figure 1, that the embodiment of the invention provides.
Embodiment 1
Alkali-lime sinter process sodium aluminate solution kind is decomposed the back mother liquor, and its composition is alumina content 60g/l, solution caustic ratio (a
k) 2.50, feeding concentration is 35% CO under 25 ℃ of temperature
2Gas, ventilation speed are 200 meters
3/ hour rice
3Solution, aeration time 1 hour, rate of decomposition 90～95% is decomposed slurries and is carried out liquid-solid separation, washing and oven dry, and the Beta-type aluminum hydroxide purity that obtains is 93%, and its Chemical Composition is seen table 1.The washings of filtrate filtered and washing precipitation burns till grog after returning the sintering circuit batching, recycles.
Embodiment 2
Alkali-lime sinter process sodium aluminate solution kind is decomposed the back mother liquor, and its composition is alumina content 60g/l, solution caustic ratio (a
k) 2.50, feeding concentration is 35% CO under 60 ℃ of temperature
2Gas, ventilation speed are 5 meters
3/ hour rice
3Solution, aeration time 6 hours, rate of decomposition 90～95% is decomposed slurries and is carried out liquid-solid separation, washing and oven dry, and the Beta-type aluminum hydroxide purity that obtains is 92%, and its Chemical Composition is seen table 1.
Embodiment 3
Alkali-lime sinter process sodium aluminate solution kind is decomposed the back mother liquor, and its composition is alumina content 35g/l, solution caustic ratio (a
k) 4.5, feeding concentration is 35% CO under 35 ℃ of temperature
2Gas, ventilation speed are 150 meters
3/ hour rice
3Solution, aeration time 2 hours, rate of decomposition 90～95% is decomposed slurries and is carried out liquid-solid separation, washing and oven dry, and the Beta-type aluminum hydroxide purity that obtains is 94%, and its Chemical Composition is seen table 1.
Embodiment 4
Alkali-lime sinter process sodium aluminate solution kind is decomposed the back mother liquor, and its composition is alumina content 35g/l, solution caustic ratio (a
k) 4.5, feeding concentration is 35% CO under 45 ℃ of temperature
2Gas, ventilation speed are 100 meters
3/ hour rice
3Solution, aeration time 3 hours, rate of decomposition 90～95% is decomposed slurries and is carried out liquid-solid separation, washing and oven dry, and the Beta-type aluminum hydroxide purity that obtains is 95%, and its Chemical Composition is seen table 1.
Embodiment 5
Alkali-lime sinter process sodium aluminate solution kind is decomposed the back mother liquor, and its composition is alumina content 45g/l, solution caustic ratio (a
k) 3.5, feeding concentration is 35% CO under 50 ℃ of temperature
2Gas, ventilation speed are 50 meters
3/ hour rice
3Solution, aeration time 4 hours, rate of decomposition 90～95% is decomposed slurries and is carried out liquid-solid separation, washing and oven dry, and the Beta-type aluminum hydroxide purity that obtains is 96%, and its Chemical Composition is seen table 1.
Embodiment 6
Alkali-lime sinter process sodium aluminate solution kind is decomposed the back mother liquor, and its composition is alumina content 45g/l, solution caustic ratio (a
k) 3.5, feeding concentration is 35% CO under 55 ℃ of temperature
2Gas, ventilation speed are 20 meters
3/ hour rice
3Solution, aeration time 5 hours, rate of decomposition 90～95% is decomposed slurries and is carried out liquid-solid separation, washing and oven dry, and the Beta-type aluminum hydroxide purity that obtains is 95%, and its Chemical Composition is seen table 1.
Embodiment 7
Alkali-lime sinter process sodium aluminate solution kind is decomposed the back mother liquor, and its composition is alumina content 55g/l, solution caustic ratio (a
k) 2.8, feeding concentration is 50% CO under 35 ℃ of temperature
2Gas, ventilation speed are 50 meters
3/ hour rice
3Solution, aeration time 3 hours, rate of decomposition 90～95% is decomposed slurries and is carried out liquid-solid separation, washing and oven dry, and the Beta-type aluminum hydroxide purity that obtains is 98%, and its Chemical Composition is seen table 1.
Embodiment 8
Alkali-lime sinter process sodium aluminate solution kind is decomposed the back mother liquor, and its composition is alumina content 55g/l, solution caustic ratio (a
k) 2.8, feeding concentration is 20% CO under 60 ℃ of temperature
2Gas, ventilation speed are 50 meters
3/ hour rice
3Solution, aeration time 6 hours, rate of decomposition 90～95% is decomposed slurries and is carried out liquid-solid separation, washing and oven dry, and the Beta-type aluminum hydroxide purity that obtains is 97%, and its Chemical Composition is seen table 1.
Table 1
The foregoing description is a preferred implementation of the present invention; But embodiment of the present invention is not restricted to the described embodiments; Other any do not deviate from change, the modification done under spirit of the present invention and the principle, substitutes, combination, simplify; All should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (4)
1. the preparation method of a Beta-type aluminum hydroxide is characterized in that:
With the seed precipitation solution is raw material, feeds in the dioxide gas to separate with raw material, and gained is dried after decomposing dope filtration, washing of precipitate, obtains Beta-type aluminum hydroxide;
Said raw material seed precipitation solution is the mother liquor behind kind of the branch white lake, and solution caustic ratio α k is 2.5-4.5, and aluminum oxide is residual to be 35-60g/L;
Carbonic acid gas in the said feeding raw material is the sub product that industrial calcined limestone is produced white lime, and its purity is 20～50%; Feeding speed is 5～200m
3/ hour m
3Solution, aeration time 1～6 hour.
2. the preparation method of Beta-type aluminum hydroxide according to claim 1 is characterized in that:
Temperature is controlled at 20 ℃～60 ℃ when feeding the carbonic acid gas decomposition in the said raw material.
3. the preparation method of Beta-type aluminum hydroxide according to claim 1 is characterized in that:
Feeding carbonic acid gas decomposition completion rear oxidation aluminium is residual in the said raw material is not more than 10%.
4. the preparation method of Beta-type aluminum hydroxide according to claim 1 is characterized in that:
The washings of said filtrate filtered and washing precipitation returns sintering process and prepares in the white lake process, participates in batching.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101962956A CN101837999B (en) | 2010-06-10 | 2010-06-10 | Preparation method of Beta-type aluminum hydroxide |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101962956A CN101837999B (en) | 2010-06-10 | 2010-06-10 | Preparation method of Beta-type aluminum hydroxide |
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| Publication Number | Publication Date |
|---|---|
| CN101837999A CN101837999A (en) | 2010-09-22 |
| CN101837999B true CN101837999B (en) | 2012-08-01 |
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|---|---|---|---|
| CN2010101962956A Active CN101837999B (en) | 2010-06-10 | 2010-06-10 | Preparation method of Beta-type aluminum hydroxide |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105399119A (en) * | 2015-12-01 | 2016-03-16 | 中国铝业股份有限公司 | Method for producing aluminum hydroxide |
| CN111892073A (en) * | 2020-07-09 | 2020-11-06 | 中铝中州铝业有限公司 | Method for removing organic matters in seed precipitation mother liquor by Bayer process |
| CN112357942A (en) * | 2020-12-03 | 2021-02-12 | 中铝中州铝业有限公司 | Method for improving whiteness of aluminum hydroxide product by Bayer process |
| CN115231596A (en) * | 2022-08-05 | 2022-10-25 | 洛阳中超新材料股份有限公司 | Industrial preparation method of bayer stone |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1289722A (en) * | 2000-11-09 | 2001-04-04 | 中国长城铝业中州铝厂 | Process for preparing beta-aluminium hydroxide |
| US20050167641A1 (en) * | 2001-05-18 | 2005-08-04 | Jianfeng Chen | Ultrafine Modified Aluminum Hydroxide and Its Preparation |
| CN1792800A (en) * | 2005-12-22 | 2006-06-28 | 山东铝业股份有限公司 | Process for preparing Large ratio surface bata-type aluminium hydroxide |
| CN101182021A (en) * | 2007-12-11 | 2008-05-21 | 中国铝业股份有限公司 | Method for preparing beta-type aluminum hydroxide |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5179095B2 (en) * | 2006-06-14 | 2013-04-10 | 裕子 石栗 | Method for producing high-purity aluminum hydroxide and high-purity aluminum hydroxide obtained by the method |
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- 2010-06-10 CN CN2010101962956A patent/CN101837999B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1289722A (en) * | 2000-11-09 | 2001-04-04 | 中国长城铝业中州铝厂 | Process for preparing beta-aluminium hydroxide |
| US20050167641A1 (en) * | 2001-05-18 | 2005-08-04 | Jianfeng Chen | Ultrafine Modified Aluminum Hydroxide and Its Preparation |
| CN1792800A (en) * | 2005-12-22 | 2006-06-28 | 山东铝业股份有限公司 | Process for preparing Large ratio surface bata-type aluminium hydroxide |
| CN101182021A (en) * | 2007-12-11 | 2008-05-21 | 中国铝业股份有限公司 | Method for preparing beta-type aluminum hydroxide |
Non-Patent Citations (1)
| Title |
|---|
| JP特开2008-19158A 2008.01.31 |
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| Publication number | Publication date |
|---|---|
| CN101837999A (en) | 2010-09-22 |
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