Process for separating para-dichlorobenzene from isomeric mixtur

Details Process for separating para-dichlorobenzene from isomeric mixtur Process for separating para-dichlorobenzene from isomeric mixtur

1986-05-15

1988-08-09

Evans, J. E.

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

Organic compounds

Halogen containing

C07C 1738, C07C 2508

Patent

active

047629550

ABSTRACT:
Disclosed herein is a process for separating p-dichlorobenzene from an isomeric mixture of dichlorobenzenes comprising adding 1-bromo-4-chlorobenzene, 1,4-dibromobenzene or a mixture of 1-bromo-4-chlorobenzene and 1,4-dibromobenzene to the isomeric mixture of dichlorobenzenes, heating the thus formed mixture to dissolve a part or the whole thereof, cooling the thus treated material, thereby crystallizing the eutictic crystals of p-dichlorobenzene and 1-bromo-4-chlorobenzene or 1,4-dibromobenzene or the eutectic crystals of p-dichlorobenzene, 1-bromo-4-chlorobenzene and 1,4-dibromobenzene, and thus separating p-dichlorobenzene from the isomeric mixture of dichlorobenzenes.

REFERENCES:
patent: 2835707 (1958-05-01), Stoesser et al.
patent: 3557226 (1971-01-01), Sherk
patent: 4300004 (1981-11-01), Wissner et al.
Campbell et al, JACS, 70, 553-561 (1948).
Wibaut et al, Rec. Trav. Chim., 56, 65-70 (1937).
Chemical Abstracts 89: 197137s.

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