Process for the preparation of p-dichlorobenzene

Details Process for the preparation of p-dichlorobenzene Process for the preparation of p-dichlorobenzene

1992-03-19

1993-05-11

Lone, Werren B.

Organic compounds -- part of the class 532-570 series

Organic compounds

Halogen containing

570207, 570208, 570209, C07C 1712, C07C 2508

Patent

active

052103439

ABSTRACT:
Dichlorobenzene having an increased p-content and a greatly reduced m-content is obtained by ring chlorination of benzene or chlorobenzene in the presence of Friedel-Crafts catalysts if the reaction is carried out in the presence of co-catalysts of the formula (I) ##STR1## wherein X represents fluorine, chlorine, bromine, trifluoromethyl or pentafluoroethyl and

REFERENCES:
patent: 4647709 (1987-03-01), Wolfram
patent: 4851596 (1989-07-01), Mais et al.
patent: 4990707 (1991-02-01), Mais et al.
Patent Abstracts of Japan, vol. 9, No. 278, Nov. 1985 & JP-A-60 125 251 (Ihara Chemical Kogyo KK).
Patent Abstracts of Japan, vol. 9, No. 293, Nov. 1985 & JP-A-60 136 576 (Ihara Chemical Kogyo KK).

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