ES8403838A1 - Method for the production of aluminium trihydroxide of large size grading - Google Patents
Method for the production of aluminium trihydroxide of large size gradingInfo
- Publication number
- ES8403838A1 ES8403838A1 ES523929A ES523929A ES8403838A1 ES 8403838 A1 ES8403838 A1 ES 8403838A1 ES 523929 A ES523929 A ES 523929A ES 523929 A ES523929 A ES 523929A ES 8403838 A1 ES8403838 A1 ES 8403838A1
- Authority
- ES
- Spain
- Prior art keywords
- suspension
- area
- decomposition
- primer
- grading
- 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
Links
Classifications
-
- 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
-
- 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
- C01P2004/61—Micrometer sized, i.e. from 1-100 micrometer
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Inorganic Chemistry (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
- Medicines Containing Antibodies Or Antigens For Use As Internal Diagnostic Agents (AREA)
Abstract
Process for the decomposition of an over-saturated alkaline aluminate solution according to the Bayer process of alkaline etching of bauxites in order to obtain simultaneously a high yield and a large size grading aluminium trihydroxide of which 10 % at the most of the resultant particles have their smallest size lower than 45 microns, by introducing a primer, said process comprising contacting the whole of the primer used with the whole of the alkaline aluminate solution to be decomposed, characterized in that: a) in the decomposition area of the Bayer process comprising "n" stages in cascade, there is created a suspension with a high content of dry material of at least 700 g/l of alkaline aluminate solution to be decomposed in at least one stage by introducing the primer comprised of aluminium trihydroxide crystals of non-selected grading, b) after a dwell time in the decomposition area at a maximum temperature selected in the range of 50-75<o>C until a weight ratio of dissolved Al2O3/caustic Na2O at the most equal to 0.7 is obtained, a fraction comprised of 50 % by volume at the most of the dry material high content suspension circulating in the decomposition area is taken away, c) then, after the taking, said fraction is introduced in the classification area of which c1, the separated grained portion, is removed and represents the production of Al(OH)3 of large size grading and, c2, the other separate portion forming a suspension is withdrawn from the classification area and admixed to the remaining fraction of the circulating suspension in the decomposition area which has not been subjected to classification, d) the resultant suspension of the operation effected at c2 is subjected to a solid-liquid separation, the separated solid phase forming the unselected size grading aluminium trihydroxyde primer, recycled in the decomposition area of the Bayer process.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8212412A FR2529877A1 (en) | 1982-07-08 | 1982-07-08 | PROCESS FOR THE PRODUCTION OF LARGE GRANULOMETRY ALUMINUM TRIHYDROXIDE |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| ES523929A0 ES523929A0 (en) | 1984-04-01 |
| ES8403838A1 true ES8403838A1 (en) | 1984-04-01 |
Family
ID=9276005
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES523929A Expired ES8403838A1 (en) | 1982-07-08 | 1983-07-07 | Method for the production of aluminium trihydroxide of large size grading |
Country Status (22)
| Country | Link |
|---|---|
| JP (1) | JPS59501207A (en) |
| AU (1) | AU555347B2 (en) |
| CA (1) | CA1205292A (en) |
| CH (1) | CH654557A5 (en) |
| DE (1) | DE3324378A1 (en) |
| ES (1) | ES8403838A1 (en) |
| FR (1) | FR2529877A1 (en) |
| GB (1) | GB2123806B (en) |
| GR (1) | GR79591B (en) |
| HU (1) | HU190601B (en) |
| IE (1) | IE55499B1 (en) |
| IN (1) | IN158680B (en) |
| IT (1) | IT1165460B (en) |
| MX (1) | MX158908A (en) |
| NL (1) | NL8302419A (en) |
| NO (1) | NO840866L (en) |
| NZ (1) | NZ204832A (en) |
| OA (1) | OA07487A (en) |
| PH (1) | PH19286A (en) |
| WO (1) | WO1984000355A1 (en) |
| YU (1) | YU43187B (en) |
| ZA (1) | ZA834977B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2551429B2 (en) * | 1983-09-05 | 1985-10-18 | Pechiney Aluminium | PROCESS FOR PRODUCING A LARGE AND REGULAR GRANULOMETRY ALUMINUM TRIHYDROXIDE |
| US4511542A (en) * | 1984-05-24 | 1985-04-16 | Kaiser Aluminum & Chemical Corporation | Bayer process production of alumina hydrate |
| FR2573414B1 (en) * | 1984-11-22 | 1989-12-01 | Pechiney Aluminium | METHOD FOR IMPLEMENTING A TWO-STAGE PRIMING FOR OBTAINING LARGE-GRAIN ALUMINA |
| FR2709302B1 (en) * | 1993-08-26 | 1995-09-22 | Pechiney Aluminium | Process for the manufacture of alumina trihydrate with sodium content and controlled particle size. |
| CN103736317A (en) * | 2013-12-14 | 2014-04-23 | 中国铝业股份有限公司 | Material feeding method for seed precipitation filter |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB653741A (en) * | 1947-09-25 | 1951-05-23 | Viggo Harms | Improvements in and relating to a method and apparatus for precipitation of solids from solutions and the like |
| FR1223274A (en) * | 1958-04-09 | 1960-06-16 | Pechiney Prod Chimiques Sa | Process for the production of alumina |
| US3649184A (en) * | 1969-05-29 | 1972-03-14 | Reynolds Metals Co | Precipitation of alumina hydrate |
| JPS5344920B2 (en) * | 1972-05-08 | 1978-12-02 | ||
| DE2531646A1 (en) * | 1975-07-15 | 1977-02-03 | Ekato Werke | METHOD AND DEVICE FOR MANUFACTURING CLAY |
| CH644332A5 (en) * | 1978-11-07 | 1984-07-31 | Alusuisse | METHOD FOR PRODUCING COARSE ALUMINUM HYDROXIDE. |
| JPS5711821A (en) * | 1980-06-27 | 1982-01-21 | Nippon Light Metal Co Ltd | Preparation of both coarse granule and fine granule of alumina |
-
1982
- 1982-07-08 FR FR8212412A patent/FR2529877A1/en active Granted
-
1983
- 1983-06-17 PH PH29071A patent/PH19286A/en unknown
- 1983-06-22 IN IN782/CAL/83A patent/IN158680B/en unknown
- 1983-07-06 NZ NZ204832A patent/NZ204832A/en unknown
- 1983-07-06 HU HU832692A patent/HU190601B/en unknown
- 1983-07-06 AU AU17073/83A patent/AU555347B2/en not_active Expired
- 1983-07-06 CH CH3711/83A patent/CH654557A5/en not_active IP Right Cessation
- 1983-07-06 JP JP58502223A patent/JPS59501207A/en active Granted
- 1983-07-06 YU YU1472/83A patent/YU43187B/en unknown
- 1983-07-06 WO PCT/FR1983/000138 patent/WO1984000355A1/en unknown
- 1983-07-06 DE DE19833324378 patent/DE3324378A1/en active Granted
- 1983-07-07 ZA ZA834977A patent/ZA834977B/en unknown
- 1983-07-07 ES ES523929A patent/ES8403838A1/en not_active Expired
- 1983-07-07 GB GB08318409A patent/GB2123806B/en not_active Expired
- 1983-07-07 OA OA58054A patent/OA07487A/en unknown
- 1983-07-07 NL NL8302419A patent/NL8302419A/en not_active Application Discontinuation
- 1983-07-07 MX MX197966A patent/MX158908A/en unknown
- 1983-07-07 CA CA000431991A patent/CA1205292A/en not_active Expired
- 1983-07-07 IE IE1588/83A patent/IE55499B1/en not_active IP Right Cessation
- 1983-07-07 IT IT21975/83A patent/IT1165460B/en active
- 1983-07-07 GR GR71884A patent/GR79591B/el unknown
-
1984
- 1984-03-07 NO NO840866A patent/NO840866L/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| ZA834977B (en) | 1984-03-28 |
| PH19286A (en) | 1986-03-04 |
| ES523929A0 (en) | 1984-04-01 |
| FR2529877A1 (en) | 1984-01-13 |
| JPS59501207A (en) | 1984-07-12 |
| YU43187B (en) | 1989-04-30 |
| GR79591B (en) | 1984-10-31 |
| IT8321975A0 (en) | 1983-07-07 |
| MX158908A (en) | 1989-03-29 |
| IN158680B (en) | 1987-01-03 |
| AU1707383A (en) | 1984-02-08 |
| IE55499B1 (en) | 1990-10-10 |
| CH654557A5 (en) | 1986-02-28 |
| NO840866L (en) | 1984-03-07 |
| NZ204832A (en) | 1986-06-11 |
| DE3324378A1 (en) | 1984-01-12 |
| CA1205292A (en) | 1986-06-03 |
| AU555347B2 (en) | 1986-09-18 |
| GB2123806A (en) | 1984-02-08 |
| GB8318409D0 (en) | 1983-08-10 |
| JPH02291B2 (en) | 1990-01-05 |
| OA07487A (en) | 1985-03-31 |
| WO1984000355A1 (en) | 1984-02-02 |
| DE3324378C2 (en) | 1988-07-28 |
| HU190601B (en) | 1986-09-29 |
| IE831588L (en) | 1984-01-08 |
| FR2529877B1 (en) | 1985-04-19 |
| NL8302419A (en) | 1984-02-01 |
| IT1165460B (en) | 1987-04-22 |
| YU147283A (en) | 1986-02-28 |
| GB2123806B (en) | 1986-07-09 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FD1A | Patent lapsed |
Effective date: 20040203 |