Process for producing 2,5-dichlorotoluene

Details Process for producing 2,5-dichlorotoluene Process for producing 2,5-dichlorotoluene

1987-08-03

1989-04-18

Evans, J. E.

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

Organic compounds

Halogen containing

570209, 570210, C07C 1733, C07C 1722, C07C 2124

Patent

active

048229288

ABSTRACT:
Disclosed herein is a process for producing 2,5-dichlorotoluene which is useful as a monomer of heat-resistant polymers and an intermediate raw material for medicines, agricultrual chemicals and various organic synthetic substances, the process giving 2,5-dichlorotoluene at a high selectivity and in a high yield and comprising the steps of chlorinating 4-t-alkyltoluene or 4-isopropyltoluene in the presence of a catalyst, thereby obtaining a 2,5-dichlorocompound, and bringing the formed 2,5-dichlorocompound into contact with toluene in the presence of a catalyst, thereby subjecting the 2,5-dichlorocompound to transalkylation.

REFERENCES:
patent: 4010214 (1977-03-01), Gelfand
patent: 4031146 (1977-06-01), Di Bella
patent: 4059642 (1977-11-01), Dewald et al.
patent: 4269674 (1981-05-01), Osa et al.
patent: 4329524 (1982-05-01), Dewald
Silberrad, "J. Chem. Soc." (1925) pp. 2677-2684.
Chemical Abstracts, vol. 104, No. 7, p. 496, Abstract No. 50631t (1986).
USSN 863601 (Pending) (Equivalent to West German Patent Above According to Applicant).

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