Patent · US Expired

Process for the electrochemical preparation of chlorine from aqueous solutions of hydrogen chloride

US6790339B2 · kind B2 · utility

6Cited by

5References

10Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Andreas Bulan · Langenfeld, DE
Fritz Gestermann · Leverkusen, DE
Hans-Dieter Pinter · Wermelskirchen, DE
Gerd Speer · Burscheid, DE

Key dates

Filing date	Jul 30, 2002
Grant date	Sep 14, 2004
Priority date	—
Expiry date	Dec 25, 2022

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC25B1/26
WIPO fieldSurface technology, coating
WIPO sectorChemistry

Abstract

The invention relates to a process for the electrochemical preparation of chlorine from aqueous solutions of hydrogen chloride in an electrolysis cell, comprising an anode chamber and a cathode chamber, the anode chamber being separated from the cathode chamber by a cation exchange membrane, the anode chamber containing an anode and the cathode chamber a gas diffusion cathode, and the aqueous solution of hydrogen chloride being passed into the anode chamber and an oxygen-containing gas into the cathode chamber, and the oxygen pressure in the cathode chamber being at least about 1.05 bar.

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