Patent · US Expired

Process for separation and purification of platinum group metals (II)

US4571265A · kind A · utility

4Cited by

4References

20Claims

0Family size

Assignee

Degussa AG · DE

Inventors

Karl-Heinz Konig · Frankfurt, DE
Michael Schuster · Frankfurt, DE
Dieter Hollmann · Darmstadt, DE
Rainer Schlodder · Rodenbach, DE

Key dates

Filing date	Nov 2, 1984
Grant date	Feb 18, 1986
Priority date	—
Expiry date	Nov 2, 2004

Classification

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

Abstract

There is described a process for the separation and purification of the platinum group metals from base metal out of acidic aqueous solutions. For this purpose there is used a substituted thiourea of the formula EQU R.sub.1 R.sub.2 N--CS--NH--CO--R.sub.3 or EQU R.sub.1 R.sub.2 N--CS--NH--COOR.sub.3 as the precipitation agent. Preferably there are employed N,N-diaklyl-N'-benzoylthiourea wherein R.sub.1 and R.sub.2 are methyl, n-butyl, or n-hexyl.

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