CN102515224A - Method for producing aluminum hydroxide powder - Google Patents
Method for producing aluminum hydroxide powder Download PDFInfo
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- CN102515224A CN102515224A CN2011104149350A CN201110414935A CN102515224A CN 102515224 A CN102515224 A CN 102515224A CN 2011104149350 A CN2011104149350 A CN 2011104149350A CN 201110414935 A CN201110414935 A CN 201110414935A CN 102515224 A CN102515224 A CN 102515224A
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Abstract
The invention provides a method for producing aluminum hydroxide powder, and relates to a method for producing ultrafine aluminum hydroxide powder by adopting a Bayer lotion and a Bayer refined liquid. The method is characterized in that a mixed liquid of a Bayer red mud one-time lotion and the Bayer refined liquid is utilized to carry out seed decomposition to produce the aluminum hydroxide powder. In the method for producing the aluminum hydroxide powder, the mixed solution of the Bayer lotion and the Bayer refined liquid is utilized to carry out seed decomposition to produce the aluminum hydroxide powder, and the slurry obtained after decomposition is filtered, washed and dried to obtain an ultrafine aluminum hydroxide product with D50 of 0.8-2 mu m, whiteness larger than 95, and oil factor of 35-39mL/100g.
Description
Technical field
A kind of method of producing aluminium hydrate powder relates to a kind of method that adopts Bayer process washing lotion and seminal fluid to produce the ultrafine aluminium hydroxide micro mist.
Technical background
At present, the ultrafine aluminium hydroxide micro mist normally adopts the seminal fluid preparation of alumina by sintering production process.Its main physical and chemical index is: granularity D50=1 ~ 3 μ m; Oil-absorption(number), 50 ~ 55ml/100g, Na2O %≤0.3; Because crude fuel price increase in the past few years; It is too high that sintering process is produced the aluminum oxide cost, and many sintering process plant downtime, limited production have had a strong impact on the production and the product-feed of ultrafine aluminium hydroxide micro mist.
Summary of the invention
The object of the invention is exactly the deficiency that exists to above-mentioned prior art, and a kind of method of the production aluminium hydrate powder that can effectively reduce production costs, satisfy the demands is provided.
The objective of the invention is to realize through following technical scheme.
A kind of method of producing aluminium hydrate powder is characterized in that be adopting the Bayer process red mud primary wash liquor and carries out decomposition of crystal seed with the mixed solution of seminal fluid and produce aluminium hydrate powder.
A kind of method of producing aluminium hydrate powder of the present invention, it is characterized in that described Bayer process red mud primary wash liquor and with the mixed solution of seminal fluid be 20%--80% blended by volume, the alumina concentration in the mixed solution is 90 ~ 160g/l.
A kind of method of producing aluminium hydrate powder of the present invention, the decomposition temperature that it is characterized in that described decomposition of crystal seed process is 50 ~ 70 ℃, resolving time 5 ~ 6h.
A kind of method of producing aluminium hydrate powder of the present invention, the crystal seed that it is characterized in that described decomposition of crystal seed process are that white lake grinds the thin crystal seed that obtains fineness D50=0.8 ~ 0.9 μ m, and the seed ratio of interpolation is 0.1 ~ 0.2.
A kind of method of producing the ultrafine aluminium hydroxide micro mist of the present invention; The crystal seed that it is characterized in that described decomposition of crystal seed process is the superfine aluminum hydroxide seed of the D50=0.1 ~ 0.2 μ m of Tai-Ace S 150 and sodium aluminate solution reaction generation, and the seed ratio of interpolation is 0.005 ~ 0.015.
The method of a kind of economic production ultrafine aluminium hydroxide micro mist of the present invention; Adopt Bayer process red mud washing lotion and seminal fluid to mix and produce the ultrafine aluminium hydroxide micro mist through decomposition of crystal seed; Decomposing rear slurry obtains D50=0.8 ~ 2 μ m through filtering, wash, drying; Whiteness>95, oil-absorption(number) 35 ~ 39ml/100g, the ultrafine aluminium hydroxide product of Na2O %≤0.2.Method of the present invention, biggest advantage are that raw material extensively is easy to get, and have effectively overcome the limitation of producing with your sintering process seminal fluid, have reduced production cost, simultaneously product oil-absorption(number), Na
2The O content's index has bigger improvement, for derived product provides high quality raw material.
Description of drawings
Fig. 1 is a process flow diagram of the present invention.
Embodiment
A kind of method of producing aluminium hydrate powder is to adopt the Bayer process red mud primary wash liquor and carry out decomposition of crystal seed with the mixed solution of seminal fluid and produce aluminium hydrate powder; Described Bayer process red mud primary wash liquor and with the mixed solution of seminal fluid be 20%--80% blended by volume, the alumina concentration in the mixed solution is 90 ~ 160g/l; The decomposition temperature of decomposition of crystal seed process is 50 ~ 70 ℃, resolving time 5 ~ 6h.
A kind of method of producing aluminium hydrate powder of the present invention, the crystal seed of described decomposition of crystal seed process are that white lake grinds the thin crystal seed that obtains fineness D50=0.8 ~ 0.9 μ m, and the seed ratio of interpolation is 0.1 ~ 0.2; Or be the superfine aluminum hydroxide seed of the D50=0.1 ~ 0.2 μ m of Tai-Ace S 150 and sodium aluminate solution reaction generation, the seed ratio of interpolation is 0.005 ~ 0.015.Decomposing rear slurry obtains D50=0.8 ~ 2 μ m, whiteness through filtering, wash, drying>95, oil-absorption(number) 35 ~ 39ml/100g, the ultrafine aluminium hydroxide product of Na2O %≤0.2.
Embodiment 1
Al
2O
3Bayer process primary wash liquor and the seminal fluid mixed solution of concentration 100g/l are pressed seed than 0.14, add the thin crystal seed of D50=0.7 μ m white lake that grinds, and decompose; 50 ~ 60 ℃ of decomposition temperatures; Resolving time 6h, the slip after the decomposition makes D50=1.5 μ m, whiteness through filtration separating, washing, oven dry; 95, oil-absorption(number) 36ml/100g, the ultrafine aluminium hydroxide product of Na2O %≤0., 2;
Embodiment 2
Al
2O
3Bayer process primary wash liquor and the seminal fluid mixed solution of concentration 150g/l are pressed seed than 0.12,, add the thin crystal seed of D50=0.8 μ m white lake that grinds; Decompose 50 ~ 60 ℃ of decomposition temperatures, resolving time 5h; Slip after the decomposition makes D50=1.2 μ m, whiteness through filtration separating, washing, oven dry; 95, oil-absorption(number) 37ml/100g, the ultrafine aluminium hydroxide product of Na2O %≤0., 2.
Claims (5)
1. method of producing aluminium hydrate powder is characterized in that being adopting the Bayer process red mud primary wash liquor and carries out decomposition of crystal seed with the mixed solution of seminal fluid and produce aluminium hydrate powder.
2. a kind of method of producing aluminium hydrate powder according to claim 1, it is characterized in that described Bayer process red mud primary wash liquor and with the mixed solution of seminal fluid be 20%--80% blended by volume, the alumina concentration in the mixed solution is 90 ~ 160g/l.
3. a kind of method of producing aluminium hydrate powder according to claim 1, the decomposition temperature that it is characterized in that described decomposition of crystal seed process is 50 ~ 70 ℃, resolving time 5 ~ 6h.
4. a kind of method of producing aluminium hydrate powder according to claim 1, the crystal seed that it is characterized in that described decomposition of crystal seed process are that white lake grinds the thin crystal seed that obtains fineness D50=0.8 ~ 0.9 μ m, and the seed ratio of interpolation is 0.1 ~ 0.2.
5. a kind of method of producing the ultrafine aluminium hydroxide micro mist according to claim 1; The crystal seed that it is characterized in that described decomposition of crystal seed process is the superfine aluminum hydroxide seed of the D50=0.1 ~ 0.2 μ m of Tai-Ace S 150 and sodium aluminate solution reaction generation, and the seed ratio of interpolation is 0.005 ~ 0.015.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104149350A CN102515224A (en) | 2011-12-14 | 2011-12-14 | Method for producing aluminum hydroxide powder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104149350A CN102515224A (en) | 2011-12-14 | 2011-12-14 | Method for producing aluminum hydroxide powder |
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| Publication Number | Publication Date |
|---|---|
| CN102515224A true CN102515224A (en) | 2012-06-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011104149350A Pending CN102515224A (en) | 2011-12-14 | 2011-12-14 | Method for producing aluminum hydroxide powder |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102992366A (en) * | 2012-11-19 | 2013-03-27 | 贵州省新材料研究开发基地 | Process method for preparing aluminum hydroxide micropowder |
| CN110372021A (en) * | 2019-06-13 | 2019-10-25 | 山东泰星新材料股份有限公司 | A kind of preparation method and application of electronic circuit board or electrician's fire retardant aluminium hydroxide |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1287973A (en) * | 2000-11-01 | 2001-03-21 | 中国长城铝业中州铝厂 | Method for preparing super fine aluminium hydroxide |
| CN1597527A (en) * | 2004-06-18 | 2005-03-23 | 中国铝业股份有限公司 | Preparation method low electric conductiving super fine aluminium hydroxide micro powder |
| CN101134587A (en) * | 2007-09-18 | 2008-03-05 | 中国铝业股份有限公司 | Method for producing aluminium oxide by series-parallel process |
| WO2010096974A1 (en) * | 2009-02-24 | 2010-09-02 | 河南未来铝业（集团）有限公司 | Method for preparing aluminum hydroxide and use of combination of methanol and inducer in process for preparing aluminum hydroxide |
-
2011
- 2011-12-14 CN CN2011104149350A patent/CN102515224A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1287973A (en) * | 2000-11-01 | 2001-03-21 | 中国长城铝业中州铝厂 | Method for preparing super fine aluminium hydroxide |
| CN1597527A (en) * | 2004-06-18 | 2005-03-23 | 中国铝业股份有限公司 | Preparation method low electric conductiving super fine aluminium hydroxide micro powder |
| CN101134587A (en) * | 2007-09-18 | 2008-03-05 | 中国铝业股份有限公司 | Method for producing aluminium oxide by series-parallel process |
| WO2010096974A1 (en) * | 2009-02-24 | 2010-09-02 | 河南未来铝业（集团）有限公司 | Method for preparing aluminum hydroxide and use of combination of methanol and inducer in process for preparing aluminum hydroxide |
Non-Patent Citations (2)
| Title |
|---|
| 王建立等: "种分法制备超细氢氧化铝过程中的粒度控制", 《轻金属》 * |
| 王玉: "超细氢氧化铝生产方法", 《轻金属》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102992366A (en) * | 2012-11-19 | 2013-03-27 | 贵州省新材料研究开发基地 | Process method for preparing aluminum hydroxide micropowder |
| CN110372021A (en) * | 2019-06-13 | 2019-10-25 | 山东泰星新材料股份有限公司 | A kind of preparation method and application of electronic circuit board or electrician's fire retardant aluminium hydroxide |
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Application publication date: 20120627 |