Method for separating hydrogen chloride and hydrogen bromide

US4254092A · kind A · utility

Assignee

• Chemische Werke Huels Aktiengesellschaft · US

Inventors

• Alfred Coenen · Marl, DE
• Kurt Kosswig · Marl, DE
• Ekkehard Wienhofer · Marl, DE

Key dates

• Filing date: Aug 7, 1979
• Grant date: Mar 3, 1981
• Expiry date: Aug 7, 1999

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C01B7/0706
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A method of separating HBr from a mixture of HBr/HCl using the difference in the stability to heat of the amine hydrohalides thereof. A mixture of HBr/HCl is treated with a solution of an amine and the HCl is split off, by the action of heat, from the amine hydrochlorides in the resulting mixture of amine hydrochlorides and amine hydrobromides, and the HBr is then recovered from the residual amine hydrobromides with the aid of a base and optionally recovered.