Composition and use of the composition for the extraction of metals from aqueous solution
US5176843A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 4, 1990 |
| Grant date | Jan 5, 1993 |
| Priority date | — |
| Expiry date | Jun 4, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S423/14
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A composition for use in extracting copper values from aqueous solutions of metal salts which comprises: PA1 A. one or more o-hydroxyaryloximes containing at least 5 aliphatic or alicyclic carbon atoms which are strong metal extractants which, in 0.2 molar solution in an aliphatic hydrocarbon solution when loaded with 50% of the theoretical uptake of copper, will be in equilibrium with a 0.1 molar solution of copper as copper perchlorate at a pH less than 1; PA1 B. one or more branched chain aliphatic or aromatic-aliphatic alcohol containing 14 to 30 carbon atoms or aliphatic or aliphatic-aromatic esters containing 10 to 30 carbon atoms in which the ratio of the number of methyl carbon atoms to the number of non-methyl carbon atoms is higher than 1:5 and which is selected from the group consisting of highly branched hexadecyl alcohol, highly branched isooctadecyl alcohol and a diester of 2,2,4-trimethyl -1,3-pentanediol; and PA1 C. one or more o-hydroxyarylketoximes which are weak metal extractants and which, in 0.2 molar solution in an aliphatic hydrocarbon solution when loaded with 50% of the theoretical uptake of copper, will be in equilibrium with a 0.1 molar solution for coppe…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.