Triazolopyrimidine extractants
US4739054A · kind A · utility
1Cited by
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7Claims
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Key dates
| Filing date | Mar 23, 1987 |
| Grant date | Apr 19, 1988 |
| Priority date | — |
| Expiry date | Mar 23, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S423/14
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Metal values, particularly copper values, are extracted from aqueous solutions containing halide or pseudohalide anion using 6, 7 substituted triazolopyrimidine wherein the 6-substituent is a group --CO--OR1 where R1 is a hydrocarbyl group containing from 1 to 35 carbon atoms, preferably an alkyl group and wherein the 7-substituent (R2) is hydrogen or a hydrocarbyl group containing from 1 to 35 atoms wherein R1 and R2 taken together contain a total of from 5 to 35 saturated carbon atoms.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.