Patent · US Expired

Process for the electrolysis of an aqueous solution of alkali metal chloride

US6890418B2 · kind B2 · utility

1Cited by

4References

6Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

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

Key dates

Filing date	Dec 3, 2002
Grant date	May 10, 2005
Priority date	—
Expiry date	Feb 18, 2023

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC25B1/46
WIPO fieldSurface technology, coating
WIPO sectorChemistry

Abstract

The invention describes a process for the electrolysis of an aqueous solution of alkali metal chloride, in particular sodium chloride, by the membrane process with an aqueous solution of alkali metal hydroxide, in particular sodium hydroxide, as catholyte, where the temperature of the alkali metal chloride solution in the anode half-element and/or the volume flow rate of the alkali metal chloride solution in the anode half-element are set in such a way that the difference between the temperature of the alkali metal hydroxide solution at the entry into the cathode half-element and the temperature of the alkali metal hydroxide solution at the exit from the cathode half-element are not greater than 15° C.

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