Patent · US Expired

Selectively extracting copper, zinc, nickel from a mixture of metal hydroxides

US4105743A · kind A · utility

5Cited by

5References

2Claims

0Family size

Assignee

MX Processer Reinhardt & Co. AB · SE

Inventors

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

Key dates

Filing date	Jun 15, 1977
Grant date	Aug 8, 1978
Priority date	—
Expiry date	Jun 15, 1997

Classification

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

Abstract

A mixture of metal hydroxides is leached with an ammoniacal carbonate solution, to dissolve nickel, copper and zinc. Metal is recovered from the leaching solution. The solid leaching residue is leached with sulphuric acid at a pH of 1.5- 3, to dissolve a further amount of nickel, copper and zinc. The acidic leaching solution is passed to the ammoniacal leaching process.

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