Patent · US Expired

Process for separating out hydrogen chloride

US5611840A · kind A · utility

5Cited by

11References

8Claims

0Family size

Assignee

Hoechst GmbH · DE

Inventors

Werner Kraus · Teublitz, DE
Thomas Vernaleken · Hofheim, DE
Wolfgang Schick · Mannheim, DE
Peter Roth · Eppstein, DE

Key dates

Filing date	Nov 29, 1995
Grant date	Mar 18, 1997
Priority date	—
Expiry date	Nov 29, 2015

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC01B7/0737
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

The invention relates to a process for separating out hydrogen chloride from a gas mixture forming in the chlorination of methane, which gas mixture contains unreacted methane, its chlorination products and hydrogen chloride formed in the reaction, by cooling and compression of the gas mixture and subsequent scrubbing with a scrubbing liquid which comprises at least one liquid chlorination product of methane. The gas mixture is separated into a methane-containing gas phase and a liquid phase containing hydrogen chloride and methane chlorination products, and the hydrogen chloride is then desorbed from the liquid phase by heating.

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