Process for purifying 1,2-dichloroethane

US7309804B2 · kind B2 · utility

Assignees

• Vinnolit Technologie GmbH & Co. KG · DE
• Vintron GmbH · DE

Inventors

• Helmut Grumann · Neuötting, DE
• Manfred Stoger · Altötting, DE
• Jurgen Eichler · Burgkirchen an der Alz, DE
• Dieter Jaculi · Altötting, DE
• Winfried Lork · Lechenich, DE
• Arend Greve · Lechenich, DE
• Jan Wilkens · Homburg, DE
• Peter Kammerhofer · Altötting, DE
• Hermann Tropp · Emmerting, DE

Key dates

• Filing date: Oct 25, 2002
• Grant date: Dec 18, 2007
• Expiry date: Aug 4, 2023

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C17/156
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process for the preparation of 1,2-dichloroethane that is very pure with respect to chloral or/and chloral hydrate and carbon dioxide is described herein. The process comprises oxychlorination of ethylene, using hydrogen chloride and an oxygen-containing gas, and alkali treatment of the 1,2-dichloroethane produced. In the process, the carbon dioxide present in the 1,2-dichloroethane-containing organic phase is, in accordance with the invention, substantially separated out from the 1,2-dichloroethane-containing organic phase before the alkali treatment.