Method for producing 1, 2-dichloroethane by direct chlorination

US7009084B2 · kind B2 · utility

Assignees

• UHDE GMBH · DE
• Vinnolit Technologie GmbH & Co. KG · DE

Inventors

• Michael Benje · Darmstadt, DE
• Dieter Jaculi · Altötting, DE
• Ingolf Mielke · Altötting, DE
• Peter Schwarzmaier · Burgkirchen an der Alz, DE
• Klaus Krejci · Burghausen, DE
• Joachim Schubert · Burghausen, DE
• Horst Ertl · Pleiskirchen, DE

Key dates

• Filing date: Feb 1, 2003
• Grant date: Mar 7, 2006
• Expiry date: Mar 10, 2023

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C17/02
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The invention relates to a method for producing high purity 1,2-dichloroethane using a liquid reaction medium that is circulated and that is essentially composed of 1,2-dichloroethane and a catalyst. At least ethylene and chlorine are added to the reaction medium and a mainly chlorine-containing gas flow is dissolved in a part of the reaction medium which is essentially devoid of dissolved ethylene. The gaseous components not dissolved in this solution are removed from the solution by means of a gas-separation device and the solution from which the undissolved gas components were removed is contacted with ethylene which is present in dissolved form.