Control of form of crystal precipitation of aluminum hydroxide using cosolvents and varying caustic concentration
US4900537A · kind A · utility
7Cited by
19References
19Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 11, 1986 |
| Grant date | Feb 13, 1990 |
| Priority date | — |
| Expiry date | Dec 11, 2006 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2006/10
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A process is disclosed for the control of the particle form of aluminum hydroxide crystals precipitated from an alkali metal aluminate solution which comprises either the use of certain monohydric and polyhydric alcohols or controlling the caustic concentration of the sodium aluminate solution or a combination whereby particles shapes may be produced principally comprising acicular form or principally comprising lamellar form, depending upon the caustic concentration of the alkali metal hydroxide and the vol. % of the alcohol.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.