CN1113038C - Process for preparing beta-aluminium hydroxide - Google Patents
Process for preparing beta-aluminium hydroxide Download PDFInfo
- Publication number
- CN1113038C CN1113038C CN00132219A CN00132219A CN1113038C CN 1113038 C CN1113038 C CN 1113038C CN 00132219 A CN00132219 A CN 00132219A CN 00132219 A CN00132219 A CN 00132219A CN 1113038 C CN1113038 C CN 1113038C
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- CN
- China
- Prior art keywords
- solution
- aluminum hydroxide
- type aluminum
- beta
- gas
- 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.)
- Expired - Lifetime
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 13
- 229910021502 aluminium hydroxide Inorganic materials 0.000 title description 3
- 238000000034 method Methods 0.000 claims abstract description 23
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 claims abstract description 18
- ANBBXQWFNXMHLD-UHFFFAOYSA-N aluminum;sodium;oxygen(2-) Chemical compound [O-2].[O-2].[Na+].[Al+3] ANBBXQWFNXMHLD-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229910001388 sodium aluminate Inorganic materials 0.000 claims abstract description 12
- 238000000354 decomposition reaction Methods 0.000 claims abstract description 10
- 239000004571 lime Substances 0.000 claims abstract description 7
- 239000007787 solid Substances 0.000 claims abstract description 6
- 238000000926 separation method Methods 0.000 claims abstract description 4
- 239000003518 caustics Substances 0.000 claims abstract description 3
- 241000209094 Oryza Species 0.000 claims description 10
- 235000007164 Oryza sativa Nutrition 0.000 claims description 10
- 235000009566 rice Nutrition 0.000 claims description 10
- 238000005273 aeration Methods 0.000 claims description 6
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 6
- 238000005406 washing Methods 0.000 claims description 4
- 239000002002 slurry Substances 0.000 claims description 3
- 238000009423 ventilation Methods 0.000 abstract description 6
- 239000007788 liquid Substances 0.000 abstract description 4
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 abstract 1
- 210000004911 serous fluid Anatomy 0.000 abstract 1
- 238000005245 sintering Methods 0.000 abstract 1
- 239000000126 substance Substances 0.000 description 4
- 239000002994 raw material Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 230000032683 aging Effects 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 159000000013 aluminium salts Chemical class 0.000 description 1
- 229910000329 aluminium sulfate Inorganic materials 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 229910001593 boehmite Inorganic materials 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000002050 diffraction method Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- FAHBNUUHRFUEAI-UHFFFAOYSA-M hydroxidooxidoaluminium Chemical compound O[Al]=O FAHBNUUHRFUEAI-UHFFFAOYSA-M 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
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- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
The present invention discloses a production method of beta type aluminum hydroxide. Refined liquid of sodium aluminate is obtained by an alkali-lime sintering method; the aluminum oxide content of the refined liquid is from 85 to 100 g/L, and the solution caustic ratio (ak) is from 1.4 to 1.6; at a temperature of 40 to 70 DEG C, CO2 gas of which the concentration is from 35 to 40% is introduced; the gas introduction speed is from 100 to 150m<3>/h. m<3>solution and the ventilation duration is from 60 to 90 minutes; the decomposition rate is from 88 to 90%; obtained decomposition serous fluid is directly separated in a mode of liquid solid separation, washed and dried to obtain beta type aluminum hydroxide of which the purity is larger than 95%. The present invention has the advantages of simple process flow and easy control of operation process.
Description
The present invention relates to produce the production method of Beta-type aluminum hydroxide with sodium aluminate solution.
Domestic relevant patent documentation Chinese patent application numbers 90105317.1 has proposed a kind of method of producing Beta-type aluminum hydroxide, it refined sodium aluminate solution through towards rare and the allotment after, make the solution oxide aluminum concentration reduce to the 35-45 grams per liter, under low temperature 35-45 ℃ condition, feed stingy amount CO
2Gas decomposes that (gas feeding speed is 30-50 rice
3/ hour rice
3Solution, aeration time 60-70 minute), degradation production wore out 1-6 hour under 70-100 ℃ of temperature, washing and drying finally obtains the Beta-type aluminum hydroxide product after filtration, its purity is the highest can only to reach 70-80%, and the solution of rare allotment filters removing solid residue because this production method will liquidate, and will carry out high temperature ageing, its Production Flow Chart is comparatively complicated, and operating process is wayward.
The purpose of this invention is to provide that a kind of to produce purity is higher, chemically reactive the is bigger Beta-type aluminum hydroxide and the technological process of production simple, the Beta-type aluminum hydroxide production method that operating process is easy to control.
For achieving the above object, the present invention is to be raw material with the sodium aluminate solution, produce Beta-type aluminum hydroxide with carbon method, the characteristics of this technology are directly to be raw material (solution is without dilute filtration) with the sodium aluminate solution, carry out carbonating and decompose under moderate temperature, and products therefrom need not wear out, promptly can be used as the finished product, the purity of product is higher, and the technological process of production is simple, and operating process is easy to control.
Details are as follows with technical process of the present invention below in conjunction with accompanying drawing.
Fig. 1 is a process flow sheet of the present invention.
By the refined sodium aluminate solution of alkali-lime sinter process gained, its alumina content is the 85-100 grams per liter, and solution caustic ratio (ak) 1.4-1.6 passes into the CO that concentration is 35-40% under 40-70 ℃ of temperature2It is 100-150 rice that gas, gas pass into speed3/ hour rice3Solution, duration of ventilation 60-90 minute, Resolution ratio 88-90%, gained decompose slurries and directly carry out liquid-solid separation, washing and oven dry, the β that obtains Type aluminium hydroxide purity is greater than 95% (referring to account for the weight percentage of aluminium hydroxide total amount).
Technology of the present invention is under moderate temperature conditions, adopts big CO2It is refining that tolerance is carried out sodium aluminate The carbon of liquid decomposes, and has save the solution that need rush rare allotment in the existing method and has filtered to remove solid Residue, and will carry out the program of high temperature ageing, its production procedure is very simple, is applicable to that big industry gives birth to Produce. The Beta-type aluminum hydroxide of being produced by the present invention has the advantages that purity is higher, chemism is bigger, Raw material mainly for the production of aluminium salt, boehmite and catalyst.
＜embodiment 〉
Embodiment 1: alkali-lime sinter process gained refined sodium aluminate solution, and its composition is alumina content 90 grams per liters, and ak 1.45, and feeding concentration is 35% CO under 50 ℃ of temperature
2Gas, ventilation speed are 130 meters
3/ hour rice
3Solution, aeration time 65 minutes, rate of decomposition 89.92% 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 sees Table 1.
Embodiment 2: alkali-lime sinter process gained refined sodium aluminate solution, and its composition is alumina content 85 grams per liters, and ak 1.4, and decomposition temperature is 60 ℃, and ventilation speed is 110 meters
3/ hour rice
3Solution, aeration time 80 minutes, rate of decomposition 88.5%, other method for subsequent processing are with embodiment 1, and the Beta-type aluminum hydroxide purity that obtains is 97%, and its Chemical Composition sees Table 1.
Embodiment 3: alkali-lime sinter process gained refined sodium aluminate solution, and its composition is alumina content 95 grams per liters, and ak 1.53, and decomposition temperature is 70 ℃, and ventilation speed is 120 meters
3/ hour rice
3Solution, aeration time 80 minutes, rate of decomposition 89.5%, other method for subsequent processing are with embodiment 1, and the Beta-type aluminum hydroxide purity that obtains is 97.8%, and its Chemical Composition sees Table 1.
Embodiment 4: alkali-lime sinter process gained refined sodium aluminate solution, its composition are alumina content 100 grams per liters, ak1.6, and decomposition temperature is 65 ℃, ventilation speed is 150 meters
3/ hour rice
3Solution, aeration time 80 minutes, rate of decomposition 90%, other method for subsequent processing are with embodiment 1, and the Beta-type aluminum hydroxide purity that obtains is 98.5%, and its Chemical Composition sees Table 1.
Table 1 product analysis of components result
(annotate: the SiO in the table 1
2, Fe
2O
3, Na
2O, igloss, be to adopt GB6610.1-86-GB6610.5-86 standard test, β-Al (OH)
3Content use day island proper Tianjin x-ray instrument to adopt a diffraction method to measure, be β type Al (OH)
3Account for all Al (OH)
3Percentage composition.)
Claims (1)
1, the production method of Beta-type aluminum hydroxide is characterized in that it is a refined sodium aluminate solution by alkali-lime sinter process gained, and its alumina content is the 85-100 grams per liter, solution caustic ratio ak 1.4-1.6, and feeding concentration under 40-70 ℃ of temperature is the CO of 35-40%
2Gas, gas feeding speed is 100-150 rice
3/ hour rice
3Solution, aeration time 60-90 minute, rate of decomposition 88-90%, gained decomposed slurries and directly carry out liquid-solid separation, washing and oven dry, and the Beta-type aluminum hydroxide purity that obtains is greater than 95%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00132219A CN1113038C (en) | 2000-11-09 | 2000-11-09 | Process for preparing beta-aluminium hydroxide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00132219A CN1113038C (en) | 2000-11-09 | 2000-11-09 | Process for preparing beta-aluminium hydroxide |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1289722A CN1289722A (en) | 2001-04-04 |
| CN1113038C true CN1113038C (en) | 2003-07-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN00132219A Expired - Lifetime CN1113038C (en) | 2000-11-09 | 2000-11-09 | Process for preparing beta-aluminium hydroxide |
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| Country | Link |
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| CN (1) | CN1113038C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1305771C (en) * | 2005-12-22 | 2007-03-21 | 山东铝业股份有限公司 | Process for preparing Large ratio surface bata-type aluminium 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 |
| CN102815734A (en) * | 2012-07-27 | 2012-12-12 | 中国铝业股份有限公司 | Preparation method of easily-dissolvable aluminum hydroxide |
| CN105347374B (en) * | 2015-11-20 | 2017-05-24 | 中国石油化工股份有限公司 | production method of pseudo-boehmite |
| CN106044815B (en) * | 2016-07-18 | 2018-03-20 | 大唐国际发电股份有限公司高铝煤炭资源开发利用研发中心 | A kind of gibbsite and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1057442A (en) * | 1990-06-19 | 1992-01-01 | 山东铝厂 | A kind of production method of aluminium hydroxide used as filling material |
| CN1023391C (en) * | 1990-06-19 | 1994-01-05 | 山东铝厂 | Process for production of aluminium hydroxide gel series products by carbon |
-
2000
- 2000-11-09 CN CN00132219A patent/CN1113038C/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1057442A (en) * | 1990-06-19 | 1992-01-01 | 山东铝厂 | A kind of production method of aluminium hydroxide used as filling material |
| CN1023391C (en) * | 1990-06-19 | 1994-01-05 | 山东铝厂 | Process for production of aluminium hydroxide gel series products by carbon |
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| Publication number | Publication date |
|---|---|
| CN1289722A (en) | 2001-04-04 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| ASS | Succession or assignment of patent right |
Owner name: CHINESE ALUMINIUM CO., LTD. Free format text: FORMER OWNER: ZHONGZHOU ALUMINIUM PLANT, CHINESE CHANGCHENG ALUMINIUM INDUSTRY GROUP Effective date: 20020423 |
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| C41 | Transfer of patent application or patent right or utility model | ||
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Effective date of registration: 20020423 Address after: 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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