CN101182021A - Method for preparing beta-type aluminum hydroxide - Google Patents
Method for preparing beta-type aluminum hydroxide Download PDFInfo
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- CN101182021A CN101182021A CNA2007101161621A CN200710116162A CN101182021A CN 101182021 A CN101182021 A CN 101182021A CN A2007101161621 A CNA2007101161621 A CN A2007101161621A CN 200710116162 A CN200710116162 A CN 200710116162A CN 101182021 A CN101182021 A CN 101182021A
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- Prior art keywords
- aluminum hydroxide
- beta
- type aluminum
- solution
- carbon dioxide
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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 81
- 238000000034 method Methods 0.000 title abstract description 24
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 55
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 28
- ANBBXQWFNXMHLD-UHFFFAOYSA-N aluminum;sodium;oxygen(2-) Chemical compound [O-2].[O-2].[Na+].[Al+3] ANBBXQWFNXMHLD-UHFFFAOYSA-N 0.000 claims abstract description 26
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 26
- 229910001388 sodium aluminate Inorganic materials 0.000 claims abstract description 26
- 238000005406 washing Methods 0.000 claims abstract description 19
- 238000002360 preparation method Methods 0.000 claims abstract description 13
- 238000001914 filtration Methods 0.000 claims abstract description 4
- 239000002994 raw material Substances 0.000 claims abstract description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 38
- 238000000354 decomposition reaction Methods 0.000 claims description 21
- 239000003518 caustics Substances 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 238000005516 engineering process Methods 0.000 abstract description 2
- 238000001035 drying Methods 0.000 abstract 1
- 239000002245 particle Substances 0.000 abstract 1
- 239000012153 distilled water Substances 0.000 description 15
- 238000000926 separation method Methods 0.000 description 15
- 238000005245 sintering Methods 0.000 description 15
- 239000002002 slurry Substances 0.000 description 15
- HUAUNKAZQWMVFY-UHFFFAOYSA-M sodium;oxocalcium;hydroxide Chemical compound [OH-].[Na+].[Ca]=O HUAUNKAZQWMVFY-UHFFFAOYSA-M 0.000 description 15
- 239000007787 solid Substances 0.000 description 15
- 238000009423 ventilation Methods 0.000 description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 15
- 238000005273 aeration Methods 0.000 description 3
- 230000032683 aging Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 235000011089 carbon dioxide Nutrition 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
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- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
The invention relates to a preparation method of Beta-type aluminum hydroxide, which is used for preparing the Beta-type aluminum hydroxide. Sodium aluminate solution is used as raw material, neutralized by feeding carbon dioxide and then is treated with filtering washing and drying to obtain the Beta-type aluminum hydroxide product. The preparation method is characterized in that Beta-type aluminum hydroxide seeds are added before the carbon dioxide is fed so as to produce the Beta-type aluminum hydroxide product with high purity and large specific surface area; in addition, the method has simple production technology, easy control of particle size and easy manipulation of the operation process.
Description
Technical field
The present invention relates to a kind of preparation method of Beta-type aluminum hydroxide, be used to produce Beta-type aluminum hydroxide.
Background technology
The production method of Beta-type aluminum hydroxide has a variety of, and domestic relevant patent documentation has:
Application number is the preparation method of 90105317.1 Beta-type aluminum hydroxide, and the refined sodium aluminate solution alumina content is controlled to be 35～45g/l, feeds the carbon dioxides neutralization at 35～45 ℃, and gas feeding speed is 30～50m
3/ hour m
3Solution, aeration time are 60～70 minutes, degradation production under 70～100 ℃ of temperature aging 1～6 hour, and after filtration, washing and oven dry finally obtain the Beta-type aluminum hydroxide product, its purity reaches 70～80%, specific surface 200m
2About/g.The sodium aluminate solution alumina concentration is not high in this scheme, needs to wear out, and product purity is not enough, and specific surface is relatively low.
Application number is the preparation method of 00132219.2 Beta-type aluminum hydroxide, the refined sodium aluminate solution alumina content is controlled to be 85～100g/l, solution caustic ratio (α k) 1.4～1.6, at 40～70 ℃ of carbon dioxides that feed concentration 35～40% down, gas feeding amount is 100～150m
3/ hour m
3Solution, aeration time are 60～90 minutes, rate of decomposition 88～90%, and obtaining product Beta-type aluminum hydroxide content is more than 97%.Do not relate to specific surface in this scheme, through experimental verification, the specific surface of product is 150～250m
2/ g, carbon dioxide feeding amount is bigger.
Application number is the production method of 200510104601.8 Beta-type aluminum hydroxide, is raw material with the sodium aluminate solution, and its alumina content is 45～65g/l, and caustic ratio (α k) 1.4～1.6 under 15～35 ℃ of temperature, feeds concentration and be 30～40% CO
2Gas, in and after 15～25 minutes, stop to feed carbon dioxide gas, continue after 20～30 minutes to feed carbon dioxide gas, the whole aeration time of carbonic acid gas are 40～90 minutes, and rate of decomposition is controlled at 65～88%, resulting Beta-type aluminum hydroxide purity is 90～99%, specific surface 300～500m
2/ g.The sodium aluminate solution alumina concentration is not high in this scheme, and rate of decomposition is lower, decomposes the system relative complex, the granularity control difficulty of product.。
Summary of the invention
The object of the present invention is to provide a kind of preparation method of Beta-type aluminum hydroxide, can produce purity height, Beta-type aluminum hydroxide product that specific surface is big, the technological process of production is simple, and granularity is controlled easily, and operating process is easy to grasp.
The preparation method of Beta-type aluminum hydroxide of the present invention, with the sodium aluminate solution is raw material, feeds carbon dioxide and neutralizes, more after filtration, washing and oven dry, obtain the Beta-type aluminum hydroxide product, it is characterized in that before feeding carbon dioxide, adding the Beta-type aluminum hydroxide seed.
The Beta-type aluminum hydroxide seed can adopt wet pulverization to become d
50Be 0.5～10 μ m, also can adopt dry method can be ground into d
50Be 10～20 μ m.
The better processing condition of suitable control are among the present invention:
Alumina content is 45～75g/l in the sodium aluminate solution, and the solution caustic ratio is 1.4～1.6.
Under 15～35 ℃ of temperature, add the Beta-type aluminum hydroxide seed of 1～10g/l, the d of Beta-type aluminum hydroxide seed
50Be 0.5～20 μ m.
The mass concentration of carbon dioxide is 30～40%, in and the time be 40～90 minutes.
Rate of decomposition is controlled at 65～95%.
The present invention is owing to added the Beta-type aluminum hydroxide seed, when decomposing, play guiding function, the stability of quality product is greatly improved, and alumina content is improved in the sodium aluminate solution, has improved rate of decomposition and productive rate, improved the specific surface of Beta-type aluminum hydroxide, the quality of Beta-type aluminum hydroxide product is good, and the technological process of production is simple, and granularity is controlled easily, operating process is easy to grasp, and is beneficial to industrial implementation.
Description of drawings
Fig. 1, process flow diagram of the present invention.
Embodiment
The invention will be further described below in conjunction with embodiment.
Embodiment 1
Soda-lime sintering process gained refined sodium aluminate solution, its composition are alumina content 110g/l, and α k1.44 towards rare alumina content 50.3g/l that arrives, down adds 7kg/m at 20 ℃ with distilled water
3The Beta-type aluminum hydroxide seed of solution, the granularity d of Beta-type aluminum hydroxide seed
50Be 2.5 μ m, feed the carbon dioxide of concentration 36%, ventilation speed is 40m
3/ hour m
3Solution decomposed 70 minutes, and rate of decomposition 90% is decomposed slurries and carried out liquid-solid separation, washing and oven dry, and obtaining Beta-type aluminum hydroxide purity is 99.0%, specific surface 445m
2/ g, d
50Be 25.6 μ m, its materialization the results are shown in Table 1.
Embodiment 2
Soda-lime sintering process gained refined sodium aluminate solution, its composition are alumina content 110g/l, and α k1.44 towards rare alumina content 50.3g/l that arrives, down adds 1kg/m at 15 ℃ with distilled water
3The Beta-type aluminum hydroxide seed of solution, the granularity d of Beta-type aluminum hydroxide seed
50Be 0.5 μ m, feed the carbon dioxide of concentration 36%, ventilation speed is 30m
3/ hour m
3Solution decomposed 90 minutes, and rate of decomposition 93% is decomposed slurries and carried out liquid-solid separation, washing and oven dry, and obtaining Beta-type aluminum hydroxide purity is 94.4%, specific surface 485m
2/ g, d
50Be 31.8 μ m, its materialization the results are shown in Table 1.
Embodiment 3
Soda-lime sintering process gained refined sodium aluminate solution, its composition are alumina content 110g/l, and α k1.44 towards rare alumina content 50.3g/l that arrives, down adds 4kg/m at 25 ℃ with distilled water
3The Beta-type aluminum hydroxide seed of solution, the granularity d of Beta-type aluminum hydroxide seed
50Be 10.6 μ m, feed the carbon dioxide of concentration 36%, ventilation speed is 40m
3/ hour m
3Solution decomposed 70 minutes, and rate of decomposition 90% is decomposed slurries and carried out liquid-solid separation, washing and oven dry, and obtaining Beta-type aluminum hydroxide purity is 92.2%, specific surface 386m
2/ g, d
50Be 38.6 μ m, its materialization the results are shown in Table 1.
Embodiment 4
Soda-lime sintering process gained refined sodium aluminate solution, its composition are alumina content 110g/l, and α k1.44 towards rare alumina content 50.3g/l that arrives, down adds 10kg/m at 35 ℃ with distilled water
3The Beta-type aluminum hydroxide seed of solution, the granularity d of Beta-type aluminum hydroxide seed
50Be 18.9 μ m, feed the carbon dioxide of concentration 36%, ventilation speed is 3m
3/ hour m
3Solution decomposed 90 minutes, and rate of decomposition 98% is decomposed slurries and carried out liquid-solid separation, washing and oven dry, and obtaining Beta-type aluminum hydroxide purity is 93.0%, specific surface 357m
2/ g, d
50Be 36.3 μ m, its materialization the results are shown in Table 1.
Embodiment 5
Soda-lime sintering process gained refined sodium aluminate solution, its composition are alumina content 110g/l, and α k1.44 towards rare alumina content 35.7g/l that arrives, down adds 1kg/m at 20 ℃ with distilled water
3The Beta-type aluminum hydroxide seed of solution, the granularity d of Beta-type aluminum hydroxide seed
50Be 10.6 μ m, feed the carbon dioxide of concentration 36%, ventilation speed is 30m
3/ hour m
3Solution decomposed 70 minutes, and rate of decomposition 96% is decomposed slurries and carried out liquid-solid separation, washing and oven dry, and obtaining Beta-type aluminum hydroxide purity is 94.3%, specific surface 405m
2/ g, d
50Be 48.7 μ m, its materialization the results are shown in Table 1.
Embodiment 6
Soda-lime sintering process gained refined sodium aluminate solution, its composition are alumina content 110g/l, and α k1.44 towards rare alumina content 35.7g/l that arrives, down adds 7kg/m at 15 ℃ with distilled water
3The Beta-type aluminum hydroxide seed of solution, the granularity d of Beta-type aluminum hydroxide seed
50Be 18.9 μ m, feed the carbon dioxide of concentration 36%, ventilation speed is 40m
3/ hour m
3Solution decomposed 50 minutes, and rate of decomposition 96% is decomposed slurries and carried out liquid-solid separation, washing and oven dry, and obtaining Beta-type aluminum hydroxide purity is 91.6%, specific surface 427m
2/ g, d
50Be 29.6 μ m, its materialization the results are shown in Table 1.
Embodiment 7
Soda-lime sintering process gained refined sodium aluminate solution, its composition are alumina content 110g/l, and α k1.44 towards rare alumina content 35.7g/l that arrives, down adds 10kg/m at 25 ℃ with distilled water
3The Beta-type aluminum hydroxide seed of solution, the granularity d of Beta-type aluminum hydroxide seed
50Be 2.5 μ m, feed the carbon dioxide of concentration 36%, ventilation speed is 40m
3/ hour m
3Solution decomposed 40 minutes, and rate of decomposition 75% is decomposed slurries and carried out liquid-solid separation, washing and oven dry, and obtaining Beta-type aluminum hydroxide purity is 96.0%, specific surface 427m
2/ g, d
50Be 18.3 μ m, its materialization the results are shown in Table 1.
Embodiment 8
Soda-lime sintering process gained refined sodium aluminate solution, its composition are alumina content 110g/l, and α k1.44 towards rare alumina content 35.7g/l that arrives, down adds 4kg/m at 35 ℃ with distilled water
3The Beta-type aluminum hydroxide seed of solution, the granularity d of Beta-type aluminum hydroxide seed
50Be 0.5 μ m, feed the carbon dioxide of concentration 36%, ventilation speed is 40m
3/ hour m
3Solution decomposed 50 minutes, and rate of decomposition 90% is decomposed slurries and carried out liquid-solid separation, washing and oven dry, and obtaining Beta-type aluminum hydroxide purity is 92.7%, specific surface 475m
2/ g, d
50Be 24.3 μ m, its materialization the results are shown in Table 1.
Embodiment 9
Soda-lime sintering process gained refined sodium aluminate solution, its composition are alumina content 110g/l, and α k1.44 towards rare alumina content 65.9g/l that arrives, down adds 4kg/m at 20 ℃ with distilled water
3The Beta-type aluminum hydroxide seed of solution, the granularity d of Beta-type aluminum hydroxide seed
50Be 18.9 μ m, feed the carbon dioxide of concentration 36%, ventilation speed is 40m
3/ hour m
3Solution decomposed 60 minutes, and rate of decomposition 65% is decomposed slurries and carried out liquid-solid separation, washing and oven dry, and obtaining Beta-type aluminum hydroxide purity is 96.0%, specific surface 386m
2/ g, d
50Be 35.8 μ m, its materialization the results are shown in Table 1.
Embodiment 10
Soda-lime sintering process gained refined sodium aluminate solution, its composition are alumina content 110g/l, and α k1.44 towards rare alumina content 65.9g/l that arrives, down adds 10kg/m at 15 ℃ with distilled water
3The Beta-type aluminum hydroxide seed of solution, the granularity d of Beta-type aluminum hydroxide seed
50Be 10.6 μ m, feed the carbon dioxide of concentration 36%, ventilation speed is 40m
3/ hour m
3Solution decomposed 90 minutes, and rate of decomposition 94% is decomposed slurries and carried out liquid-solid separation, washing and oven dry, and obtaining Beta-type aluminum hydroxide purity is 91.0%, specific surface 414m
2/ g, d
50Be 24.9 μ m, its materialization the results are shown in Table 1.
Embodiment 11
Soda-lime sintering process gained refined sodium aluminate solution, its composition are alumina content 110g/l, and α k1.44 towards rare alumina content 65.9g/l that arrives, down adds 7kg/m at 25 ℃ with distilled water
3The Beta-type aluminum hydroxide seed of solution, the granularity d of Beta-type aluminum hydroxide seed
50Be 0.5 μ m, feed the carbon dioxide of concentration 36%, ventilation speed is 40m
3/ hour m
3Solution decomposed 70 minutes, and rate of decomposition 85% is decomposed slurries and carried out liquid-solid separation, washing and oven dry, and obtaining Beta-type aluminum hydroxide purity is 99.0%, specific surface 438m
2/ g, d
50Be 19.6 μ m, its materialization the results are shown in Table 1.
Embodiment 12
Soda-lime sintering process gained refined sodium aluminate solution, its composition are alumina content 110g/l, and α k1.44 towards rare alumina content 65.9g/l that arrives, down adds 1kg/m at 35 ℃ with distilled water
3The Beta-type aluminum hydroxide seed of solution, the granularity d of Beta-type aluminum hydroxide seed
50Be 2.5 μ m, feed the carbon dioxide of concentration 36%, ventilation speed is 40m
3/ hour m
3Solution decomposed 90 minutes, and rate of decomposition 95% is decomposed slurries and carried out liquid-solid separation, washing and oven dry, and obtaining Beta-type aluminum hydroxide purity is 95.4%, specific surface 375m
2/ g, d
50Be 38.6 μ m, its materialization the results are shown in Table 1.
Embodiment 13
Soda-lime sintering process gained refined sodium aluminate solution, its composition are alumina content 110g/l, and α k1.44 towards rare alumina content 74.8g/l that arrives, down adds 10kg/m at 20 ℃ with distilled water
3The Beta-type aluminum hydroxide seed of solution, the granularity d of Beta-type aluminum hydroxide seed
50Be 0.5 μ m, feed the carbon dioxide of concentration 36%, ventilation speed is 40m
3/ hour m
3Solution decomposed 70 minutes, and rate of decomposition 65% is decomposed slurries and carried out liquid-solid separation, washing and oven dry, and obtaining Beta-type aluminum hydroxide purity is 93.0%, specific surface 398m
2/ g, d
50Be 18.6 μ m, its materialization the results are shown in Table 1.
Embodiment 14
Soda-lime sintering process gained refined sodium aluminate solution, its composition are alumina content 110g/l, and α k1.44 towards rare alumina content 74.8g/l that arrives, down adds 4kg/m at 15 ℃ with distilled water
3The Beta-type aluminum hydroxide seed of solution, the granularity d of Beta-type aluminum hydroxide seed
50Be 2.5 μ m, feed the carbon dioxide of concentration 36%, ventilation speed is 40m
3/ hour m
3Solution decomposed 80 minutes, and rate of decomposition 99% is decomposed slurries and carried out liquid-solid separation, washing and oven dry, and obtaining Beta-type aluminum hydroxide purity is 96.7%, specific surface 445m
2/ g, d
50Be 35.1 μ m, its materialization the results are shown in Table 1.
Embodiment 15
Soda-lime sintering process gained refined sodium aluminate solution, its composition are alumina content 110g/l, and α k1.44 towards rare alumina content 74.8g/l that arrives, down adds 7kg/m at 35 ℃ with distilled water
3The Beta-type aluminum hydroxide seed of solution, the granularity d of Beta-type aluminum hydroxide seed
50Be 10.6 μ m, feed the carbon dioxide of concentration 36%, ventilation speed is 30m
3/ hour m
3Solution decomposed 90 minutes, and rate of decomposition 96% is decomposed slurries and carried out liquid-solid separation, washing and oven dry, and obtaining Beta-type aluminum hydroxide purity is 91.3%, specific surface 367m
2/ g, d
50Be 31.8 μ m, its materialization the results are shown in Table 1.
(table 1 vides infra)
Table 1, product analysis be table (weight percent) as a result
Claims (5)
1. the preparation method of a Beta-type aluminum hydroxide, with the sodium aluminate solution is raw material, feeds carbon dioxide and neutralizes, more after filtration, washing and oven dry, obtain the Beta-type aluminum hydroxide product, it is characterized in that before feeding carbon dioxide, adding the Beta-type aluminum hydroxide seed.
2. the preparation method of Beta-type aluminum hydroxide according to claim 1 is characterized in that alumina content is 45～75g/l in the sodium aluminate solution, and the solution caustic ratio is 1.4～1.6.
3. the preparation method of Beta-type aluminum hydroxide according to claim 1 and 2 is characterized in that under 15～35 ℃ of temperature, adds the Beta-type aluminum hydroxide seed of 1～10g/l, the d of Beta-type aluminum hydroxide seed
50Be 0.5～20 μ m.
4. the preparation method of Beta-type aluminum hydroxide according to claim 3, the mass concentration that it is characterized in that carbon dioxide is 30～40%, in and the time be 40～90 minutes.
5. the preparation method of Beta-type aluminum hydroxide according to claim 4 is characterized in that rate of decomposition is controlled at 65～95%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101161621A CN101182021A (en) | 2007-12-11 | 2007-12-11 | Method for preparing beta-type aluminum hydroxide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101161621A CN101182021A (en) | 2007-12-11 | 2007-12-11 | Method for preparing beta-type aluminum hydroxide |
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| Publication Number | Publication Date |
|---|---|
| CN101182021A true CN101182021A (en) | 2008-05-21 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101837999A (en) * | 2010-06-10 | 2010-09-22 | 中国铝业股份有限公司 | Preparation method of Beta-type aluminum hydroxide |
| 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 |
-
2007
- 2007-12-11 CN CNA2007101161621A patent/CN101182021A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101837999A (en) * | 2010-06-10 | 2010-09-22 | 中国铝业股份有限公司 | Preparation method of Beta-type aluminum hydroxide |
| CN101837999B (en) * | 2010-06-10 | 2012-08-01 | 中国铝业股份有限公司 | Preparation method of Beta-type aluminum hydroxide |
| 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 |
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Open date: 20080521 |