Process for the production of aromatic carboxylic acid chlorides

Details Process for the production of aromatic carboxylic acid chlorides Process for the production of aromatic carboxylic acid chlorides

1981-10-19

1983-05-10

Trousof, Natalie

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260544B, 260544P, C07C 5160

Patent

active

043828981

ABSTRACT:
A single-stage process for the production of pure, particularly sulphur-free, aromatic carboxylic acid chlorides by reacting an aromatic carboxylic acid containing from 1 to 3 carboxyl groups or a corresponding mixture of aromatic carboxylic acids with thionyl chloride in the presence of a catalyst, wherein tertiary phosphine oxides or their reaction products with thionyl chloride and/or the acid chloride to be formed are used as catalysts, and the use of the aromatic dicarboxylic acid dichlorides and tricarboxylic acid trichlorides obtained for the production of polycondensates.

REFERENCES:
patent: 3962326 (1976-06-01), Semler et al.
Patai, Saul, "The Chemistry of Acyl Halides", (1972), p. 36, Interscience, Publ.

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