Patent · US Expired

Preparation of chromic acid using bipolar membranes

US5096547A · kind A · utility

9Cited by

2References

1Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Helmut Klotz · Friedrichshafen, DE
Rainer Weber · Leverkusen, DE
Wolfgang Ohlendorf · Leverkusen, DE

Key dates

Filing date	Jun 21, 1991
Grant date	Mar 17, 1992
Priority date	—
Expiry date	Jun 21, 2011

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC25B1/28
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

The invention relates to a process for the preparation of alkali metal dichromates and chromic acid by the electrolysis of monochromate and/or dichromate solutions in a multi-chamber cell, wherein the anode chamber is shielded from the solution of chromate, dichromate and/or chromic acid by a bipolar ion exchanger membrane.

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