PROCESS FOR ISOMERIZING MONOCHLOROPHENOLS OR DICHLOROPHENOLS

摘要

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 3chlorophenol by isomerizing 2-chlorophenol and/or 4chlorophenol and to a process for preparing 2,5dichlorophenol by isomerizing 2,4-dichlorophenol using said method.