Solid aluminum hydroxide compositions
US4882140A · kind A · utility
7Cited by
6References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 6, 1987 |
| Grant date | Nov 21, 1989 |
| Priority date | — |
| Expiry date | May 6, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S423/09
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Solid aluminum hydroxide compositions having improved solubility, stability and filterability are formed by adding at least a stoichiometric amount of a solid base to a concentrated solution of an aluminum salt (about 8.3% Al.sub.2 O.sub.3 or higher) and stirring vigorously. The base used has an alkali metal, alkali earth metal, or other metallic cation, and does not contribute an anion other than hydroxide to the solution. Particularly suitable bases are carbonate and bicarbonate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.