Document Type and Number:
Japanese Patent JPS6251253
Kind Code:
B2
Abstract:
A one-step process for the preparation of pure aromatic dicarboxylic acid dichlorides by reacting an aromatic dicarboxylic acid or an aromatic dicarboxylic acid mixture with phosgene in the presence of a catalyst and, optionally, in a solvent or diluent, by using tertiary phosphines as catalysts, and the use of the dicarboxylic acid dichlorides obtained for the production of polycondensates.
Inventors:
DEIETAA FURAITAAKU
MANFURETSUDO SHUMITSUTO
RUDOITSUHI BOTSUTENBURUFU
MANFURETSUDO SHUMITSUTO
RUDOITSUHI BOTSUTENBURUFU
Application Number:
JP9004280A
Publication Date:
October 29, 1987
Filing Date:
July 03, 1980
Export Citation:
Assignee:
BAYER AG
International Classes:
B01J31/00; C07C63/15; B01J31/02; C07B61/00; C07C51/00; C07C51/60; C07C63/24; C07C63/30; C07C63/33; C07C65/21; C07C67/00; C07C313/00; C07C323/62