CN103449484B - Method for continuously producing pseudoboehmite - Google Patents
Method for continuously producing pseudoboehmite Download PDFInfo
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- CN103449484B CN103449484B CN201310374043.1A CN201310374043A CN103449484B CN 103449484 B CN103449484 B CN 103449484B CN 201310374043 A CN201310374043 A CN 201310374043A CN 103449484 B CN103449484 B CN 103449484B
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- boehmite
- sodium aluminate
- aluminate solution
- pseudo
- mixed gas
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- VXAUWWUXCIMFIM-UHFFFAOYSA-M aluminum;oxygen(2-);hydroxide Chemical compound [OH-].[O-2].[Al+3] VXAUWWUXCIMFIM-UHFFFAOYSA-M 0.000 title claims abstract description 39
- 238000000034 method Methods 0.000 title claims abstract description 26
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 52
- 230000032683 aging Effects 0.000 claims abstract description 43
- 238000006243 chemical reaction Methods 0.000 claims abstract description 36
- 239000002002 slurry Substances 0.000 claims abstract description 30
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 22
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 22
- 238000001035 drying Methods 0.000 claims abstract description 21
- 239000000203 mixture Substances 0.000 claims abstract description 14
- 238000001914 filtration Methods 0.000 claims abstract description 13
- 239000007788 liquid Substances 0.000 claims abstract description 13
- 238000005406 washing Methods 0.000 claims abstract description 12
- ANBBXQWFNXMHLD-UHFFFAOYSA-N aluminum;sodium;oxygen(2-) Chemical compound [O-2].[O-2].[Na+].[Al+3] ANBBXQWFNXMHLD-UHFFFAOYSA-N 0.000 claims description 37
- 229910001388 sodium aluminate Inorganic materials 0.000 claims description 37
- 239000012065 filter cake Substances 0.000 claims description 20
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 13
- 238000011049 filling Methods 0.000 claims description 11
- 235000011089 carbon dioxide Nutrition 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 abstract description 13
- 239000011148 porous material Substances 0.000 abstract description 8
- 238000001935 peptisation Methods 0.000 abstract description 6
- 239000011734 sodium Substances 0.000 abstract description 6
- 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 abstract description 5
- 229910052708 sodium Inorganic materials 0.000 abstract description 5
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 abstract description 3
- 238000005265 energy consumption Methods 0.000 abstract description 3
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 abstract description 3
- 229910001593 boehmite Inorganic materials 0.000 abstract description 2
- FAHBNUUHRFUEAI-UHFFFAOYSA-M hydroxidooxidoaluminium Chemical compound O[Al]=O FAHBNUUHRFUEAI-UHFFFAOYSA-M 0.000 abstract description 2
- 238000010924 continuous production Methods 0.000 abstract 1
- 238000002360 preparation method Methods 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 38
- 239000000047 product Substances 0.000 description 15
- 239000000126 substance Substances 0.000 description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 2
- 229910021502 aluminium hydroxide Inorganic materials 0.000 description 2
- 159000000013 aluminium salts Chemical class 0.000 description 2
- 229910000329 aluminium sulfate Inorganic materials 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000006386 neutralization reaction Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 229910018626 Al(OH) Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005255 carburizing Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005649 metathesis reaction Methods 0.000 description 1
- 150000004682 monohydrates Chemical class 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 230000009965 odorless effect Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 230000009967 tasteless effect Effects 0.000 description 1
Classifications
-
- Y02P20/121—
Abstract
The invention discloses a method for continuously producing pseudoboehmite, belonging to the technical field of boehmite preparation. The method comprises the following steps: continuously adding a sodium metaaluminate solution into a reactor while introducing an air-carbon dioxide gas mixture, and forming a strong liquid flow of the sodium metaaluminate solution to be thoroughly mixed with the carbon dioxide gas; controlling the flow rates of the gas mixture and the sodium metaaluminate solution to control the temperature of the slurry generated by reaction at 25-55 DEG C and the pH value at 9.5-11; and after the slurry passes through a pipeline with a plurality of U-shaped bends, aging the slurry, filtering, washing with water, and drying to obtain the pseudoboehmite. The pseudoboehmite prepared by the method has the characteristics of large specific area and pore volume, reasonable peptization, continuous production, simple technique, high production efficiency, stable product quality, low equipment investment, reliable operation, low energy consumption, low labor intensity and the like, is convenient to operate and maintain, and is especially suitable for producing common pseudoboehmite, superfine aluminum hydroxide or aluminum oxide.
Description
Technical field
The present invention relates to aluminium stone preparing technical field, particularly a kind of method of continuous seepage pseudo-boehmite.
Background technology
Pseudo-boehmite is also known as monohydrate alumina, false boehmite, nontoxic, tasteless, odorless, white colloidal shape (wet product) or powder (dry product), crystalline phase purity is high, peptization performance good, cohesiveness is strong, have the features such as specific surface is high, pore volume is large, it is thixotropy gel containing aquosity.
The production method of pseudo-boehmite has multiple: external normal employing aluminium alcoholates method at present, and quality product is high and pore structure is easy to control, but production cost is high, there is environmental pollution; Current domestic most economical, most widely used be acid system or alkaline process.The production method of industrial pseudo-boehmite mainly comprises following three kinds:
(1) neutralization of aluminium salt and alkali:
AlCl
3+3NH
3OH——>Al(OH)
3+3NH
4Cl
(2) the replacement(metathesis)reaction method of aluminium salt and sodium metaaluminate:
Al
2(SO
4)
3+6NaAlO
2+12H
2O——>8Al(OH)
3+3Na
2SO
4
(3) neutralization of sodium metaaluminate and acid, as carborization:
2NaAlO
2+CO
2+3H
2O——>2Al(OH)
3+Na
2CO
3
Wherein, the process of carborization production pseudo-boehmite is as follows: with the industrial sodium aluminate solution of low-temperature and low-concentration for raw material, pass into high concentration CO fast
2gas, as in precipitation agent and plastic, controls the pH value of gelling temperature and terminal, then through heating up, aging, washing, dry, obtain common pseudo-boehmite product.
Carborization prepares pseudo-boehmite can rely on alumina producer, and raw material sources are extensive, production cost is low, and the waste liquid in production can recycle in returning alumina Production Flow Chart, and basic no waste mine is discharged, and environmental pollution is little, resulting in and applies widely.But the process that carborization prepares pseudo-boehmite mostly is interruption production, and facility investment is large, personnel labor intensity is large, productivity is low, and quality product fluctuation is large.
Summary of the invention
The interruption preparing pseudo-boehmite in order to solve existing carborization is produced, and labour intensity is large, productivity is low, and the quality product fluctuation problem such as large, the invention provides a kind of method of continuous seepage pseudo-boehmite, comprising:
Sodium aluminate solution is joined in reaction unit continuously, and the mixed gas of air and carbonic acid gas is passed in described reaction unit, make sodium aluminate solution form powerful liquid stream and fully mix with carbon dioxide; Control the flow of mixed gas and sodium aluminate solution, the flow ratio of described mixed gas and sodium aluminate solution is 10 ~ 100, and the slurry temperature that reaction is generated is 50 ~ 55 DEG C, and pH value is 10.5 ~ 11; Will the slip of reaction gained by there is the curved Cemented filling of multiple u-shaped to ageing tank, slip carry out aging, filter, be washed to neutrality and drying treatment, obtain pseudo-boehmite; The alumina concentration of described sodium aluminate solution is 67.4 ~ 80g/L; The percent by volume of described carbon dioxide in gas mixture is 80% ~ 100%, and the pressure of described mixed gas is 0.1MPa ~ 0.3MPa.
Described slip through overaging, the step of filtering, being washed to neutrality and drying treatment specifically comprises:
Slip enters ageing tank and heats up after the pipeline curved containing multiple u-shaped, controls aging temperature and is not less than 90 DEG C;
By the slurry filtration after aging intensification, filter cake is washed to neutrality;
Filter cake after washing is carried out drying treatment.
The drying temperature of described drying treatment is 100 ~ 120 DEG C.
The features such as method of the present invention has continuous seepage, technique is simple, production efficiency is high, constant product quality, facility investment are few, simple and convenient operation and maintenance, reliable, energy consumption is low and labour intensity is little, are specially adapted to the production of common pseudo-boehmite or ultrafine aluminium hydroxide, aluminum oxide.By the pseudo-boehmite prepared by the inventive method, specific surface area is large, pore volume, peptization are reasonable.
Accompanying drawing explanation
Fig. 1 is the method flow diagram of the continuous seepage pseudo-boehmite of the embodiment of the present invention.
Embodiment
Below in conjunction with drawings and Examples, technical solution of the present invention is further described.
See Fig. 1, embodiments provide a kind of method of continuous seepage pseudo-boehmite, the method comprises the steps:
Step 101: sodium aluminate solution is joined in reaction unit continuously, and the mixed gas of air and carbonic acid gas is passed in this reaction unit, make sodium aluminate solution form powerful liquid stream fully to mix with carbon dioxide, the bubble of exquisiteness more than producing;
In the present embodiment, the alumina concentration of sodium aluminate solution is 15 ~ 80g/L; The percent by volume of carbon dioxide in gas mixture is 30% ~ 100%, and the pressure of mixed gas is 0.1MPa ~ 0.3MPa;
Step 102: control the flow ratio of mixed gas and sodium aluminate solution 10 ~ 100, the slurry temperature that reaction is generated is 25 ~ 55 DEG C, and pH value is 9.5 ~ 11, stops plastic;
Step 103: the slip of reaction gained is had the curved Cemented filling of multiple u-shaped to ageing tank by sufficiently long, slip through overaging, filter, be washed to neutrality and drying treatment, obtain pseudo-boehmite.
In the present embodiment, by slip by sufficiently long and the Cemented filling that there is multiple u-shaped curved heat up to ageing tank, control aging temperature be not less than 90 DEG C; By the slurry filtration after aging intensification, filter cake is washed to neutrality; Again the filter cake after washing is carried out drying treatment, drying temperature is 100 ~ 120 DEG C, finally obtains pseudo-boehmite.
In order to clearly set forth the method for the continuous seepage pseudo-boehmite of the embodiment of the present invention, further illustrate below by several typical Application Example.
Embodiment 1
Be that the sodium aluminate solution of 15.3g/L is joined in reaction unit continuously by pump by alumina concentration, pass into the mixed gas of air and carbonic acid gas, the percent by volume of carbon dioxide in gas mixture is 30%, the pressure of mixed gas is 0.1MPa, make sodium aluminate solution form powerful liquid stream fully to mix with carbon dioxide, the bubble of exquisiteness more than producing; The flow ratio controlling mixed gas and sodium aluminate solution is 10, and the slurry temperature that reaction is generated is 25 DEG C and pH value when being 9.5, stopping plastic; The slip of reaction gained is had the curved Cemented filling of multiple u-shaped to ageing tank by sufficiently long, and slurry heats up in ageing tank, aging temperature is 90 DEG C; By the slurry filtration after aging, filter cake is washed to neutrality; Filter cake after washing is carried out drying and processing, and bake out temperature is 100 DEG C, and finally obtain common pseudo-boehmite product, its physico-chemical property sees the following form 1.
Embodiment 2
Be that the sodium aluminate solution of 23.5g/L is joined in reaction unit continuously by pump by alumina concentration, pass into the mixed gas of air and carbonic acid gas, the percent by volume of carbon dioxide in gas mixture is 40%, the pressure of mixed gas is 0.12MPa, make sodium aluminate solution form powerful liquid stream fully to mix with carbon dioxide, the bubble of exquisiteness more than producing; The flow ratio controlling mixed gas and sodium aluminate solution is 30, and the slurry temperature that reaction is generated is 30 DEG C and pH value when being 9.5, stopping plastic; The slip of reaction gained is had the curved Cemented filling of multiple u-shaped to ageing tank by sufficiently long, and slurry heats up in ageing tank, aging temperature is 95 DEG C; By the slurry filtration after aging, filter cake is washed to neutrality; Filter cake after washing is carried out drying and processing, and bake out temperature is 102 DEG C, and finally obtain common pseudo-boehmite product, its physico-chemical property sees the following form 1.
Embodiment 3
Be that the sodium aluminate solution of 35.3g/L is joined in reaction unit continuously by pump by alumina concentration, pass into the mixed gas of air and carbonic acid gas, the percent by volume of carbon dioxide in gas mixture is 50%, the pressure of mixed gas is 0.15MPa, make sodium aluminate solution form powerful liquid stream fully to mix with carbon dioxide, the bubble of exquisiteness more than producing; The flow ratio controlling mixed gas and sodium aluminate solution is 40, and the slurry temperature that reaction is generated is 35 DEG C and pH value when being 10, stopping plastic; The slip of reaction gained is had the curved Cemented filling of multiple u-shaped to ageing tank by sufficiently long, and slurry heats up in ageing tank, aging temperature is 100 DEG C; By the slurry filtration after aging, filter cake is washed to neutrality; Filter cake after washing is carried out drying and processing, and bake out temperature is 102 DEG C, and finally obtain common pseudo-boehmite product, its physico-chemical property sees the following form 1.
Embodiment 4
Be that the sodium aluminate solution of 43.1g/L is joined in reaction unit continuously by pump by alumina concentration, pass into the mixed gas of air and carbonic acid gas, the percent by volume of carbon dioxide in gas mixture is 60%, the pressure of mixed gas is 0.2MPa, make sodium aluminate solution form powerful liquid stream fully to mix with carbon dioxide, the bubble of exquisiteness more than producing; The flow ratio controlling mixed gas and sodium aluminate solution is 50, and the slurry temperature that reaction is generated is 40 DEG C and pH value when being 10, stopping plastic; The slip of reaction gained is had the curved Cemented filling of multiple u-shaped to ageing tank by sufficiently long, and slurry heats up in ageing tank, aging temperature is 98 DEG C; By the slurry filtration after aging, filter cake is washed to neutrality; Filter cake after washing is carried out drying and processing, and bake out temperature is 110 DEG C, and finally obtain common pseudo-boehmite product, its physico-chemical property sees the following form 1.
Embodiment 5
Be that the sodium aluminate solution of 51.9g/L is joined in reaction unit continuously by pump by alumina concentration, pass into the mixed gas of air and carbonic acid gas, the percent by volume of carbon dioxide in gas mixture is 70%, the pressure of mixed gas is 0.25MPa, make sodium aluminate solution form powerful liquid stream fully to mix with carbon dioxide, the bubble of exquisiteness more than producing; The flow ratio controlling mixed gas and sodium aluminate solution is 60, and the slurry temperature that reaction is generated is 45 DEG C and pH value when being 11, stopping plastic; The slip of reaction gained is had the curved Cemented filling of multiple u-shaped to ageing tank by sufficiently long, and slurry heats up in ageing tank, aging temperature is 97 DEG C; By the slurry filtration after aging, filter cake is washed to neutrality; Filter cake after washing is carried out drying and processing, and bake out temperature is 115 DEG C, and finally obtain common pseudo-boehmite product, its physico-chemical property sees the following form 1.
Embodiment 6
Be that the sodium aluminate solution of 67.4g/L is joined in reaction unit continuously by pump by alumina concentration, pass into the mixed gas of air and carbonic acid gas, the percent by volume of carbon dioxide in gas mixture is 80%, the pressure of mixed gas is 0.3MPa, make sodium aluminate solution form powerful liquid stream fully to mix with carbon dioxide, the bubble of exquisiteness more than producing; The flow ratio controlling mixed gas and sodium aluminate solution is 80, and the slurry temperature that reaction is generated is 50 DEG C and pH value when being 11, stopping plastic; The slip of reaction gained is had the curved Cemented filling of multiple u-shaped to ageing tank by sufficiently long, and slurry heats up in ageing tank, aging temperature is 93 DEG C; By the slurry filtration after aging, filter cake is washed to neutrality; Filter cake after washing is carried out drying and processing, and bake out temperature is 120 DEG C, and finally obtain common pseudo-boehmite product, its physico-chemical property sees the following form 1.
Embodiment 7
Be that the sodium aluminate solution of 78.83g/L is joined in reaction unit continuously by pump by alumina concentration, pass into the mixed gas of air and carbonic acid gas, the percent by volume of carbon dioxide in gas mixture is 100%, the pressure of mixed gas is 0.3MPa, make sodium aluminate solution form powerful liquid stream fully to mix with carbon dioxide, the bubble of exquisiteness more than producing; The flow ratio controlling mixed gas and sodium aluminate solution is 100, and the slurry temperature that reaction is generated is 55 DEG C and pH value when being 10.5, stopping plastic; The slip of reaction gained is had the curved Cemented filling of multiple u-shaped to ageing tank by sufficiently long, and slurry heats up in ageing tank, aging temperature is 94 DEG C; By the slurry filtration after aging, filter cake is washed to neutrality; Filter cake after washing is carried out drying and processing, and bake out temperature is 120 DEG C, and finally obtain common pseudo-boehmite product, its physico-chemical property sees the following form 1.
Table 1
| Character | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 | Embodiment 6 | Embodiment 7 |
| Peptization, % | 97.1 | 96.1 | 95.6 | 97.5 | 96.4 | 98.1 | 96.9 |
| Specific surface, m 2/g | 289.02 | 341.3 | 345.43 | 298.44 | 325.81 | 356.66 | 394.52 |
| Pore volume, ml/L | 0.33 | 0.31 | 0.31 | 0.36 | 0.30 | 0.31 | 0.32 |
As can be seen from Table 1, by the pseudo-boehmite prepared by the method for the present embodiment, specific surface area is large, pore volume, peptization are reasonable.The analysis of pore volume and specific surface area in table 1, can adopt low temperature liquid nitrogen absorption method.(note: in common pseudo-boehmite quality standard Q/Chalco A020-2004, peptization>=95%, specific surface>=250m
2/ g, pore volume>=0.3ml/L)
Sodium aluminate solution joins in reaction unit by the present embodiment pump continuously, sufficiently long and there is the curved transport pipe of multiple u-shaped ensure that fully carrying out of carburizing reagent, overcome pseudo-boehmite and be interrupted the defect of producing, there is continuous seepage, technique be simple, facility investment is few, simple and convenient operation and maintenance, the feature such as reliable, energy consumption is low and labour intensity is little, improve work production rate, stabilize quality product, be specially adapted to the production of common pseudo-boehmite or ultrafine aluminium hydroxide, aluminum oxide.
Above-described specific embodiment; object of the present invention, technical scheme and beneficial effect are further described; be understood that; the foregoing is only specific embodiments of the invention; be not limited to the present invention; within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (3)
1. a method for continuous seepage pseudo-boehmite, is characterized in that, comprising:
Sodium aluminate solution is joined in reaction unit continuously, and the mixed gas of air and carbonic acid gas is passed in described reaction unit, make sodium aluminate solution form powerful liquid stream and fully mix with carbon dioxide; Control the flow of mixed gas and sodium aluminate solution, the flow ratio of described mixed gas and sodium aluminate solution is 10 ~ 100, and the slurry temperature that reaction is generated is 50 ~ 55 DEG C, and pH value is 10.5 ~ 11; Will the slip of reaction gained by there is the curved Cemented filling of multiple u-shaped to ageing tank, slip through overaging, filter, be washed to neutrality and drying treatment, obtain pseudo-boehmite; The alumina concentration of described sodium aluminate solution is 67.4 ~ 80g/L; The percent by volume of described carbon dioxide in gas mixture is 80% ~ 100%, and the pressure of described mixed gas is 0.1MPa ~ 0.3MPa.
2. the method for continuous seepage pseudo-boehmite as claimed in claim 1, is characterized in that, described slip through overaging, the step of filtering, being washed to neutrality and drying treatment specifically comprises:
Slip is passed into ageing tank to heat up, control aging temperature and be not less than 90 DEG C;
By the slurry filtration after aging intensification, filter cake is washed to neutrality;
Filter cake after washing is carried out drying treatment.
3. the method for continuous seepage pseudo-boehmite as claimed in claim 2, it is characterized in that, the drying temperature of described drying treatment is 100 ~ 120 DEG C.
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| CN104959091B (en) * | 2015-06-08 | 2017-09-08 | 辽宁石油化工大学 | Carburizing reagent synthesis system and its application in terms of boehmite is prepared and preparation method |
| CN104973613A (en) * | 2015-06-25 | 2015-10-14 | 厦门大学 | Method for continuously producing aluminum oxide by using carbonation method |
| CN105600812B (en) * | 2015-12-24 | 2017-05-10 | 江苏晶晶新材料有限公司 | Method for preparing high-viscosity and superfine pseudo boehmite coating adhesive |
| CN107200339A (en) * | 2017-05-31 | 2017-09-26 | 广西壮族自治区化工研究院 | A kind of method for preparing boehmite |
| CN111377466B (en) * | 2018-12-27 | 2022-09-09 | 中国石油化工股份有限公司 | Preparation method of pseudo-boehmite and alumina prepared by same |
| CN114506865B (en) * | 2020-10-29 | 2023-10-10 | 中国石油化工股份有限公司 | Method for preparing aluminum hydroxide by aluminum hydroxide and carbonization method |
| CN114426297B (en) * | 2020-10-29 | 2023-07-28 | 中国石油化工股份有限公司 | Method for continuously preparing pseudo-boehmite |
| CN113461408B (en) * | 2021-07-22 | 2022-11-01 | 杭州智华杰科技有限公司 | Method for improving strength of activated alumina balls |
| CN115724448A (en) * | 2022-11-21 | 2023-03-03 | 岳阳慧璟新材料科技有限公司 | Process method for preparing pseudo-boehmite by continuous carbonization |
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| CN2616525Y (en) * | 2003-03-10 | 2004-05-19 | 中国石油化工股份有限公司 | Reactor for preparing aluminium hydroxide |
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| CN101172631A (en) * | 2007-11-09 | 2008-05-07 | 中国铝业股份有限公司 | Method of producing pseudo boehmite |
-
2013
- 2013-08-23 CN CN201310374043.1A patent/CN103449484B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4492682A (en) * | 1982-01-29 | 1985-01-08 | Rhone-Poulenc Specialites Chimiques | Preparation of ultrapure boehmites and/or pseudo-boehmites |
| CN85100161A (en) * | 1985-04-01 | 1986-07-30 | 山东省铝厂 | Carbonating technology (CO 2Method) produces pseudo-boehmite |
| CN2616525Y (en) * | 2003-03-10 | 2004-05-19 | 中国石油化工股份有限公司 | Reactor for preparing aluminium hydroxide |
| CN1583568A (en) * | 2004-06-03 | 2005-02-23 | 山东铝业股份有限公司 | Preparation of pseudo thinolite |
| CN101172631A (en) * | 2007-11-09 | 2008-05-07 | 中国铝业股份有限公司 | Method of producing pseudo boehmite |
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