JPS55113616A - Manufacture of acid soluble aluminum hydroxide - Google Patents
Manufacture of acid soluble aluminum hydroxideInfo
- Publication number
- JPS55113616A JPS55113616A JP2073779A JP2073779A JPS55113616A JP S55113616 A JPS55113616 A JP S55113616A JP 2073779 A JP2073779 A JP 2073779A JP 2073779 A JP2073779 A JP 2073779A JP S55113616 A JPS55113616 A JP S55113616A
- Authority
- JP
- Japan
- Prior art keywords
- aluminum hydroxide
- alumina
- amt
- seed
- added
- 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.)
- Granted
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
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)
Abstract
PURPOSE: To cheaply manufacture aluminum hydroxide with enhanced solubility in acids by adding a small amt. of fine aluminum hydroxide as a seed to an alkali aluminate soln. contg. alumina dissolved in a supersaturation state.
CONSTITUTION: Aluminum hydroxide obtd. by the Bayer process is dry pulverized to fine powder of 3μ or less in average particle size on the basis of a sedimentation method. This powder is added as a seed to an alkali aluminate soln. contg. alumina dissolved in a supersaturation state in an amt. of 0.1W7wt% as alumina to the amt. of the dissolved alumina. The powder-added soln. is fed to a deposition process of the Bayer process, where aluminum hydroxide is deposited. The mechanism of forming this acid sol. aluminum hydroxide is estimated as follows: since the amt. of the seed added is small, alumina deposited is mainly consumed to form fresh aluminum hydroxide particles owing to uncleus formation, whereby slow growth of crystals does not occur, and the formed particles are rich in cohesion power.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2073779A JPS55113616A (en) | 1979-02-26 | 1979-02-26 | Manufacture of acid soluble aluminum hydroxide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2073779A JPS55113616A (en) | 1979-02-26 | 1979-02-26 | Manufacture of acid soluble aluminum hydroxide |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS55113616A true JPS55113616A (en) | 1980-09-02 |
| JPS6411570B2 JPS6411570B2 (en) | 1989-02-27 |
Family
ID=12035500
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2073779A Granted JPS55113616A (en) | 1979-02-26 | 1979-02-26 | Manufacture of acid soluble aluminum hydroxide |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS55113616A (en) |
-
1979
- 1979-02-26 JP JP2073779A patent/JPS55113616A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6411570B2 (en) | 1989-02-27 |
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