Process for the preparation of terephthaloyl and isophthaloyl di

Details Process for the preparation of terephthaloyl and isophthaloyl di Process for the preparation of terephthaloyl and isophthaloyl di

1983-05-12

1985-07-09

Trousof, Natalie

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260694, C07C 5160

Patent

active

045281467

ABSTRACT:
An improved process for the preparation of terephthaloyl and isophthaloyl dichlorides by chlorination of dimethyl terephthalate and isophthalate with chlorine gas at temperatures from 100.degree.-250.degree. C., optionally in the presence of light and/or catalysts promoting side-chain chlorination of aromatic compounds, according to which 20 to 200% by weight, relative to the weight of dimethyl terephthalate and/or isophthalate, of terephthaloyl and/or isophthaloyl dichloride are added to the dimethyl terephthalate and/or isophthalate for the chlorination.

REFERENCES:
patent: 2676187 (1954-04-01), Foster et al.
patent: 2865959 (1958-12-01), Toland
patent: 3878244 (1975-04-01), Zengel et al.
The Condensed Chemical Dictionary, Van Nostrand, Publ. (1974), pp. 316, 485, 851 and 852.

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