Patent · US Expired

Re-extracting metal chloride complex from an organic extraction solution

US4203964A · kind A · utility

6Cited by

4References

7Claims

0Family size

Assignee

MX Processer Reinhardt & Co. AB · SE

Inventors

Hans Reinhardt · Bretten, DE
Ulf V. Kuylenstierna · Kristinehamn, SE

Key dates

Filing date	Jul 3, 1978
Grant date	May 20, 1980
Priority date	—
Expiry date	Jul 3, 1998

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S423/14
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

The invention relates to the re-extraction of a metal from an organic extraction solution in which the metal is present as a metal chloride complex bonded to an extractant. The organic extraction solution is contacted with an aqueous solution, to transfer metal ions and chloride ions to the aqueous solution. Sulphuric acid is added to the aqueous solution, which is subsequently heated to drive off hydrogen chloride and water. Metal sulphate is removed from the acidified aqueous solution.

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