Poly-(n-[2-hydroxybenzyl])-1,2-diaminoethanes
US5183940A · kind A · utility
4Cited by
11References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 11, 1991 |
| Grant date | Feb 2, 1993 |
| Priority date | — |
| Expiry date | May 11, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P10/20
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Gallium is efficiently extracted from strongly basic solutions containing aluminates by extractants having the tris- and/or tetrakis (2-hydroxybenzyl)-1,2-diaminoethane chemical moiety. The diaminoethane derivative may be used together with a hydrocarbyl 8-hydroxyquinoline and/or with a tertiary carboxylic acid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.