Alumina compounds in ion exchange resins
US4430311A · kind A · utility
44Cited by
2References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 22, 1983 |
| Grant date | Feb 7, 1984 |
| Priority date | — |
| Expiry date | Apr 22, 2003 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23C14/34
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Formation of hydrous alumina in the reticules of a weak-base anion exchange resin, wherein AlCl.sub.3 has been precipitated as hydrous alumina by reaction with ammonia, is improved by employing a subsequent treatment with HCl or with NH.sub.4 Cl and HCl to convert the exchange resin to the chloride form, thereby increasing the reticular volume of the resin, thus permitting subsequent precipitation of additional hydrous alumina therein.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.