Method of recovering extractant
US5879556A · kind A · utility
29Cited by
18References
21Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 25, 1995 |
| Grant date | Mar 9, 1999 |
| Priority date | — |
| Expiry date | Jan 25, 2015 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D11/0457
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method for the recovery of extractant from the aqueous effluent continuously exiting from a solvent extraction circuit, in which the effluent is contacted with the same water-immiscible diluent being used in the circuit as solvent for the extractant, such that the extractant transfers from the aqueous effluent phase to the diluent phase. The diluent phase, now enriched in extractant, is separated from the aqueous effluent, now depleted in extractant. The separated diluent phase can then be recontacted with effluent or may be combined with the organic phase of the solvent extraction circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.