Process for the preparation of aromatic dicarboxylic acid dichlo

Details Process for the preparation of aromatic dicarboxylic acid dichlo Process for the preparation of aromatic dicarboxylic acid dichlo

1980-06-30

1981-12-22

Trousof, Natalie

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07C 5160

Patent

active

043070396

ABSTRACT:
A single-stage process for the preparation of high purity aromatic dicarboxylic acid dichlorides by reacting an aromatic dicarboxylic acid or an aromatic dicarboxylic acid mixture with phosgene in the presence of betaines as catalysts and optionally in a solvent or diluent, and the application of the aromatic dicarboxylic acid dichlorides for making polycondensates.

REFERENCES:
patent: 3544626 (1970-12-01), Carr et al.

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