Process for preparing 1,2-dichlorobenzene

US4827057A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Josef Kasbauer · Wermelskirchen, DE
• Helmut Fiege · Leverkusen, DE
• Herbert Schmidt · Friedberg, DE
• Karlfried Wedemeyer · Cologne, DE

Key dates

• Filing date: Jul 14, 1988
• Grant date: May 2, 1989
• Expiry date: Jul 14, 2008

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C17/23
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

1,2-Dichlorobenzene can be prepared by reacting 1,2,4-trichlorobenzene in the gas phase with hydrogen. The reaction is carried out at a temperature from the boiling point of the starting material up to about 400.degree. C. and over a platinum-spinel catalyst.