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.
Type:
Grant
Filed:
October 25, 2002
Date of Patent:
December 18, 2007
Assignees:
Vinnolit Technologie GmbH & Co., Vintron GmbH
Inventors:
Helmut Grumann, Manfred Stoger, Jurgen Eichler, Dieter Jaculi, Winfried Lork, Arend Greve, Jan Wilkens, Peter Kammerhofer, Hermann Tropp