Process for producing styrene

US4549032A · kind A · utility

Assignees

• Metallgesellschaft AG · DE
• Deggendorfer Werft und Eisenbau GmbH · DE

Inventors

• Friedrich-Wilhelm Moeller · Friedrichsdorf, DE
• Henning Buchold · Hanau, DE
• Helmut Klein · Osterode, DE
• Otto-Ludwig Garkisch · Bad Soden, DE
• Friedrich Guetlhuber · Metten, DE
• Walter Laber · Deggendorf, DE

Key dates

• Filing date: May 23, 1984
• Grant date: Oct 22, 1985
• Expiry date: May 23, 2004

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C5/333
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process for producing styrene by the dehydrogenation of ethyl benzene whereby the ethyl benzene in a mixture with steam is introduced into a tubular reactor, the tubes of which are heated by molten salts. The structural parameters of this process are the tube diameter which should be 20 to 35 millimeters, the temperature of the molten salts which should be 580.degree. to 660.degree. C. and at most 20.degree. C. higher than the reaction temperature at the catalyst and the weight ratio of steam to ethyl benzene of the feed stock which should be 0.5 to 1. The process saves energy and increases efficiency by reducing the steam consumption.