CN108569714A - It improves and decomposes aluminium hydroxide micro powder resolution ratio method - Google Patents
It improves and decomposes aluminium hydroxide micro powder resolution ratio method Download PDFInfo
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- CN108569714A CN108569714A CN201810341394.5A CN201810341394A CN108569714A CN 108569714 A CN108569714 A CN 108569714A CN 201810341394 A CN201810341394 A CN 201810341394A CN 108569714 A CN108569714 A CN 108569714A
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- aluminium hydroxide
- resolution ratio
- micro powder
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F7/00—Compounds of aluminium
- C01F7/02—Aluminium oxide; Aluminium hydroxide; Aluminates
- C01F7/04—Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom
- C01F7/14—Aluminium oxide or hydroxide from alkali metal aluminates
- C01F7/144—Aluminium oxide or hydroxide from alkali metal aluminates from aqueous aluminate solutions by precipitation due to cooling, e.g. as part of the Bayer process
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/60—Particles characterised by their size
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/19—Oil-absorption capacity, e.g. DBP values
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/40—Electric properties
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/60—Optical properties, e.g. expressed in CIELAB-values
Abstract
The present invention relates to a kind of raisings to decompose aluminium hydroxide micro powder resolution ratio method, belongs to inorganic combustion inhibitor Material Field；Include the following steps：(1) aluminium hydroxide is added into initial soln, and adjusts aluminium hydroxide and obtains concentration；(2) water is added in solution obtained into step (1), and adjusts the concentration of aluminium hydroxide；(3) crystallizing seeds are added in solution obtained into step (2), then control temperature, decomposition precipitates crystal；(4) it filters and filter cake is made, product is finally made in then press filtration.The present invention, which can be improved effectively, decomposes aluminium hydroxide micro powder resolution ratio, and resolution ratio is up to 60 63%, effectively improves value of the product.
Description
Technical field
The present invention relates to a kind of raisings to decompose aluminium hydroxide micro powder resolution ratio method, belongs to inorganic combustion inhibitor Material Field.
Background technology
Country's main production controls product resolution ratio 50%-58% at present, and it is low that there are production capacities, and product crystal pattern is poor
The problems such as.Technique is generally two kinds at present, and one is by grinding device that alumina powder seed is levigate, institute is then added
In the solution to be configured；
It is neutralisation in second, aluminium hydroxide is obtained by the method that aluminium hydroxide micro powder seed is precipitated in aluminum sulfate solution
Then micro mist seed is added in required configuration solution；
It is low that traditional handicraft results in product resolution ratio, causes quantum of output relatively low in this way, has potency so as to cause product
It is worth to reduction.
Invention content
It is insufficient according to prior art, the technical problem to be solved by the present invention is to：A kind of raising decomposition aluminium hydroxide is provided
Micro mist resolution ratio method, effectively improves resolution ratio, improves the value of product.
The technical solution adopted by the present invention to solve the technical problems is：A kind of raising decomposition aluminium hydroxide micro powder point is provided
The method of solution rate, includes the following steps：
(1) aluminium hydroxide is added into initial soln, and adjusts aluminium hydroxide and obtains concentration；
(2) water is added in solution obtained into step (1), and adjusts the concentration of aluminium hydroxide；
(3) crystallizing seeds are added in solution obtained into step (2), then control temperature, decomposition precipitates crystal；
(4) it filters and filter cake is made, product is finally made in then press filtration.
Initial soln described in step (1) is sodium aluminate, a concentration of 230-240g/L of sodium aluminate in initial soln.
A concentration of 240-260g/L of aluminium hydroxide in solution made from step (1).
The temperature of water described in step (2) is 60-80 DEG C
A concentration of 120-130g/L of aluminium hydroxide in solution made from step (2).
Crystallizing seeds described in step (3) are aluminium hydroxide, and the addition of aluminium hydroxide is the 8- of solution gross mass
15%, the D50 of crystallizing seeds is 2.8-3.2 microns.
Described in step (3) is 60 DEG C controlled at temperature when crystallizing seeds are added, and is then cooled to after 8 hours
It 35-40 DEG C, then decomposes again 16 hours.
The beneficial effects of the invention are as follows：
1, the present invention, which can be improved effectively, decomposes aluminium hydroxide micro powder resolution ratio, and resolution ratio is up to 60-63%, effectively carries
High product is worth；
2, the aluminium hydroxide micro powder that the present invention obtains is in crystallization process, and precipitation crystal form is complete, and structure is excellent；
3, present device is simple, small investment, and the aluminium hydroxide micro powder particle size stability higher produced, technological process
It is simpler.
Specific implementation mode
The embodiment of the present invention is described further below：
Embodiment 1
A kind of raising aluminium hydroxide micro powder resolution ratio method, includes the following steps：
(1) aluminium hydroxide is added into initial soln, and adjusts aluminium hydroxide and obtains concentration；
(2) water is added in solution obtained into step (1), and adjusts the concentration of aluminium hydroxide；
(3) crystallizing seeds are added in solution obtained into step (2), then control temperature, decomposition precipitates crystal；
(4) it filters and filter cake is made, product is finally made in then press filtration.
Initial soln described in step (1) is sodium aluminate, a concentration of 230g/L of sodium aluminate in initial soln.
A concentration of 240g/L of aluminium hydroxide in solution made from step (1).
The temperature of water described in step (2) is 60 DEG C
A concentration of 120g/L of aluminium hydroxide in solution made from step (2).
Crystallizing seeds described in step (3) are aluminium hydroxide, and the addition of aluminium hydroxide is the 8% of solution gross mass,
The D50 of crystallizing seeds is 2.8-3.2 microns.
Described in step (3) is 60 DEG C controlled at temperature when crystallizing seeds are added, and is then cooled to after 8 hours
It 35-40 DEG C, then decomposes again 16 hours.
The resolution ratio of aluminium hydroxide micro powder is 60% in the present embodiment.
The performance parameter that product aluminium hydroxide micro powder is made is as follows：
Grain size D50 1.352
Whiteness 97.0
Conductivity 32
Oil absorbency 41.
Embodiment 2
A method of it improves and decomposes aluminium hydroxide micro powder resolution ratio, include the following steps：
(1) aluminium hydroxide is added into initial soln, and adjusts aluminium hydroxide and obtains concentration；
(2) water is added in solution obtained into step (1), and adjusts the concentration of aluminium hydroxide；
(3) crystallizing seeds are added in solution obtained into step (2), then control temperature, decomposition precipitates crystal；
(4) it filters and filter cake is made, product is finally made in then press filtration.
Initial soln described in step (1) is sodium aluminate, a concentration of 240g/L of sodium aluminate in initial soln.
A concentration of 260g/L of aluminium hydroxide in solution made from step (1).
Washing lotion described in step (2) is water, and water temperature is 80 DEG C
A concentration of 130g/L of aluminium hydroxide in solution made from step (2).
Crystallizing seeds described in step (3) are aluminium hydroxide, and the addition of aluminium hydroxide is the 15% of solution gross mass,
The D50 of crystallizing seeds is 2.8-3.2 microns.
Described in step (3) is 60 DEG C controlled at temperature when crystallizing seeds are added, and is then cooled to after 8 hours
It 35-40 DEG C, then decomposes again 16 hours.
The resolution ratio of aluminium hydroxide micro powder is 63% in the present embodiment.
The performance parameter that product aluminium hydroxide micro powder is made is as follows：
Grain size D50 1.013
Whiteness 97.5
Conductivity 43
Oil absorbency 43.
Embodiment 3
A method of it improves and decomposes aluminium hydroxide micro powder resolution ratio, include the following steps：
(1) aluminium hydroxide is added into initial soln, and adjusts aluminium hydroxide and obtains concentration；
(2) water is added in solution obtained into step (1), and adjusts the concentration of aluminium hydroxide；
(3) crystallizing seeds are added in solution obtained into step (2), then control temperature, decomposition precipitates crystal；
(4) it filters and filter cake is made, product is finally made in then press filtration.
Initial soln described in step (1) is sodium aluminate, a concentration of 235g/L of sodium aluminate in initial soln.
A concentration of 249g/L of aluminium hydroxide in solution made from step (1).
The temperature of water described in step (2) is 70 DEG C
A concentration of 125g/L of aluminium hydroxide in solution made from step (2).
Crystallizing seeds described in step (3) are aluminium hydroxide, and the addition of aluminium hydroxide is the 12% of solution gross mass,
The D50 of crystallizing seeds is 2.8-3.2 microns.
Described in step (3) is 60 DEG C controlled at temperature when crystallizing seeds are added, and is then cooled to after 8 hours
It 35-40 DEG C, then decomposes again 16 hours.
The resolution ratio of aluminium hydroxide micro powder is 62% in the present embodiment.
The performance parameter that product aluminium hydroxide micro powder is made is as follows：
Grain size D50 1.152
Whiteness 97.3
Conductivity 36
Oil absorbency 43.
Claims (7)
1. a kind of improving the method for decomposing aluminium hydroxide micro powder resolution ratio, it is characterised in that include the following steps：
(1) aluminium hydroxide is added into initial soln, and adjusts aluminium hydroxide and obtains concentration；
(2) water is added in solution obtained into step (1), and adjusts the concentration of aluminium hydroxide；
(3) crystallizing seeds are added in solution obtained into step (2), then control temperature, decomposition precipitates crystal；
(4) it filters and filter cake is made, product is finally made in then press filtration.
2. according to claim 1 improve the method for decomposing aluminium hydroxide micro powder resolution ratio, it is characterised in that step (1) institute
The initial soln stated is sodium aluminate, a concentration of 230-240g/L of sodium aluminate in initial soln.
3. according to claim 1 improve the method for decomposing aluminium hydroxide micro powder resolution ratio, it is characterised in that step (1) is made
A concentration of 240-260g/L of aluminium hydroxide in the solution obtained.
4. according to claim 1 improve the method for decomposing aluminium hydroxide micro powder resolution ratio, it is characterised in that step (2) institute
The coolant-temperature gage stated is 60-80 DEG C.
5. according to claim 1 improve the method for decomposing aluminium hydroxide micro powder resolution ratio, it is characterised in that step (2) is made
A concentration of 120-130g/L of aluminium hydroxide in the solution obtained.
6. according to claim 1 improve the method for decomposing aluminium hydroxide micro powder resolution ratio, it is characterised in that in step (3)
The crystallizing seeds are aluminium hydroxide, and the addition of aluminium hydroxide is the 8-15% of solution gross mass, and the D50 of crystallizing seeds is
2.8-3.2 micron.
7. according to claim 1 improve the method for decomposing aluminium hydroxide micro powder resolution ratio, it is characterised in that in step (3)
Described is 60 DEG C controlled at temperature when crystallizing seeds are added, and then cools to 35-40 DEG C after 8 hours, then decomposes again
16 hours.
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| CN201810341394.5A CN108569714A (en) | 2018-04-17 | 2018-04-17 | It improves and decomposes aluminium hydroxide micro powder resolution ratio method |
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| CN201810341394.5A CN108569714A (en) | 2018-04-17 | 2018-04-17 | It improves and decomposes aluminium hydroxide micro powder resolution ratio method |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1359123A2 (en) * | 1999-07-06 | 2003-11-05 | SASOL Germany GmbH | Process for the preparation of hydrated aluminium oxides by precipitation from aluminium salts in presence of crystallization seeds |
| CN1927719A (en) * | 2006-09-29 | 2007-03-14 | 中国铝业股份有限公司 | Preparation method of aluminium hydroxide micro powder |
| CN101717102A (en) * | 2009-11-23 | 2010-06-02 | 山东南山铝业股份有限公司 | Method for preparing aluminum hydroxide micropowder |
| CN101928948A (en) * | 2010-09-02 | 2010-12-29 | 吉林麦达斯铝业有限公司 | Recovery process of alkaline washing residual liquid for aluminum profile extrusion die |
| CN104045100A (en) * | 2014-06-27 | 2014-09-17 | 中国铝业股份有限公司 | Preparation method of aluminum hydroxide |
| CN104817100A (en) * | 2015-04-15 | 2015-08-05 | 中南大学 | Method for preparing sand-shaped aluminum oxide |
| 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 |
| CN106745126A (en) * | 2017-01-13 | 2017-05-31 | 山东鲁北企业集团总公司 | A kind of method with phosphoric acid seed production ultrafine aluminium hydroxide |
| CN107500318A (en) * | 2017-09-26 | 2017-12-22 | 马海军 | The method that lithium carbonate is extracted from aluminum oxide factory sodium aluminate solution |
-
2018
- 2018-04-17 CN CN201810341394.5A patent/CN108569714A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1359123A2 (en) * | 1999-07-06 | 2003-11-05 | SASOL Germany GmbH | Process for the preparation of hydrated aluminium oxides by precipitation from aluminium salts in presence of crystallization seeds |
| CN1927719A (en) * | 2006-09-29 | 2007-03-14 | 中国铝业股份有限公司 | Preparation method of aluminium hydroxide micro powder |
| CN101717102A (en) * | 2009-11-23 | 2010-06-02 | 山东南山铝业股份有限公司 | Method for preparing aluminum hydroxide micropowder |
| CN101928948A (en) * | 2010-09-02 | 2010-12-29 | 吉林麦达斯铝业有限公司 | Recovery process of alkaline washing residual liquid for aluminum profile extrusion die |
| CN104045100A (en) * | 2014-06-27 | 2014-09-17 | 中国铝业股份有限公司 | Preparation method of aluminum hydroxide |
| CN104817100A (en) * | 2015-04-15 | 2015-08-05 | 中南大学 | Method for preparing sand-shaped aluminum oxide |
| 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 |
| CN106745126A (en) * | 2017-01-13 | 2017-05-31 | 山东鲁北企业集团总公司 | A kind of method with phosphoric acid seed production ultrafine aluminium hydroxide |
| CN107500318A (en) * | 2017-09-26 | 2017-12-22 | 马海军 | The method that lithium carbonate is extracted from aluminum oxide factory sodium aluminate solution |
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Application publication date: 20180925 |