Process for isomerizing monochlorophenols or dichlorophenols

US4568777A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Herbert Baltes · Losheim, DE
• Ernst I. Leupold · Neu-Anspach, DE

Key dates

• Filing date: Nov 9, 1984
• Grant date: Feb 4, 1986
• Expiry date: Nov 9, 2004

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01J35/50
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

The invention relates to a process for isomerizing monochlorophenols or dichlorophenols in which one or more monochlorophenol or dichlorophenol is passed in the gas phase over a zeolite catalyst. In particular, the invention relates to a process for preparing 3-chlorophenol by isomerizing 2-chlorophenol and/or 4-chlorophenol and to a process for preparing 2,5-dichlorophenol by isomerizing 2,4-dichlorophenol using said method.