Process for making 1,2-dichloroethane

US4672142A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Joachim Hundeck · Bonn, DE
• Harald Scholz · Frankfurt am Main, DE
• Hans Hennen
• Bernhard Kuxdorf · Münstermaifeld, DE
• Herbert Pusche

Key dates

• Filing date: Sep 16, 1982
• Grant date: Jun 9, 1987
• Expiry date: Sep 16, 2002

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C17/383
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The disclosure relates to a process for making 1,2-dichloroethane by reacting ethylene and chlorine in a reaction zone having a liquid medium containing chlorinated C.sub.2 -hydrocarbons circulated therein. To this end, the disclosure provides: PA0 (a) for approximately equimolar proportions of ethylene and chlorine to be introduced into the circulated liquid medium; for the whole to be reacted in a reaction zone at a temperature of about 75.degree. up to 200.degree. C. under a pressure of about 1 up to 15 bars, the mean sojourn time of the reaction mixture in the mixing zone and reaction zone being equal to about 1 to 15 hours; PA0 (b) for a portion of liquid reaction mixture to be removed from the reaction zone and subdivided into two streams, for one of these streams to be passed through a heat exchanger for the abstraction of calorific energy and reduction of its initial temperature, and for it to be recycled to the mixing and reaction zone; for the second stream to be introduced into an expansion vessel and for proportions corresponding to the quantity of reaction product formed in the reaction zone to be evaporated therein; for resulting vaporous matter to be introduced into …