Patent · US Expired

Recovering zinc from a material containing zinc and iron

US4124462A · kind A · utility

32Cited by

6References

7Claims

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	Jan 26, 1977
Grant date	Nov 7, 1978
Priority date	—
Expiry date	Jan 26, 1997

Classification

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

Abstract

Zinc is recovered from a material containing zinc and iron. The material is leached with sulphuric acid to produce a final pH of 3-5.5. Zinc powder is added to the leaching solution to precipitate polluting metals. Zinc is now extracted with a solution of a dialkyl phosphoric acid in an organic solvent. Zinc is extracted from the organic solution with sulphuric acid. Zinc is recovered from the sulphuric acid solution as metal or as zinc sulphate.

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