Patent · US Expired

Dimensionally stable anodes and their use in the preparation of alkali metal dichromates and chromic acid

US5128000A · kind A · utility

8Cited by

3References

7Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Helmut Klotz · Friedrichshafen, DE
Rainer Weber · Leverkusen, DE
Norbert Lonhoff · Leverkusen, DE
Hans-Dieter Block · Cologne, DE

Key dates

Filing date	Apr 1, 1991
Grant date	Jul 7, 1992
Priority date	—
Expiry date	Apr 1, 2011

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC25B11/091
WIPO fieldSurface technology, coating
WIPO sectorChemistry

Abstract

A dimensionally stable anode comprised of PA0 a) an electrically conductive valve metal PA0 b) a conductive intermediate layer and PA0 c) an electrode coating of an electrocatalytically active substance, wherein the intermediate layer comprises one or more noble metals or their alloys which have been applied to the valve metal by deposition by electroplating from melts containing noble metal salts. This anode can be used in the production alkali metal dichromates and chromic acid by electrolysis of alkali metal monochromate and/or alkali metal dichromate solutions.

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