Patent · US Expired

Method and a reagent mixture for removing metal ions from an aqueous solution by means of liquid-liquid extraction

US4226791A · kind A · utility

14Cited by

3References

11Claims

0Family size

Assignee

Berol Kemi AB

Inventors

Hans Reinhardt · Bretten, DE
Harald D. Ottertun · Mölndal, SE

Key dates

Filing date	Nov 30, 1978
Grant date	Oct 7, 1980
Priority date	—
Expiry date	Nov 30, 1998

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02P10/20
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

A liquid-liquid extraction process is disclosed, in which an aqueous solution, containing metal ions, is contacted with an organic liquid substantially insoluble in water. The organic liquid contains two water-insoluble reagents, viz. a diester of dithiophosphoric acid and an organic phosphate, in a preferred volume ratio of between 1:10 and 2:1. The organic liquid may also contain a diluent for the reagents.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.