Patent · US Expired

Process for direct electrochemical gaseous phase phosgene synthesis

US5961813A · kind A · utility

31Cited by

1References

20Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Fritz Gestermann · Leverkusen, DE
Jurgen Dobbers · Leverkusen, DE
Hans-Nicolaus Rindfleisch · Brunsbüttel, DE

Key dates

Filing date	May 18, 1998
Grant date	Oct 5, 1999
Priority date	—
Expiry date	May 18, 2018

Classification

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

Abstract

An electrochemical cell (1 ) having a proton-conducting membrane (4) is used in the process for the direct electrochemical gas phase synthesis of phosgene. Dry HCl gas and dry CO gas are supplied as the educts to the anode (2) of the electrochemical cell (1). The chlorine radicals formed on anodic oxidation of the HCl gas then react directly with the CO gas to yield phosgene, while the simultaneously formed protons migrate through the membrane (4) to the cathode (3) and are there reduced to hydrogen or, in the presence of oxygen, to water.

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