Title:
PRODUCTION OF NUCLEUS-MONOCHLORINATED AROMATIC DICARBOXYLIC ACID DICHLORIDE
Document Type and Number:
Japanese Patent JPH04312551
Kind Code:
A
Abstract:
PURPOSE: To produce a nucleus-monochlorinated aromatic dicarboxylic acid dichloride such as 2-chloroterephthaloyl dichloride and 5-chloroisophthaloyl dichloride on an industrial scale at a low cost.
CONSTITUTION: Xylene is photo-chlorinated under irradiation of light containing ultraviolet ray and the obtained hexachloroxylene is made to react with chlorine. The reaction product is distilled under reduced pressure to obtain a nucleus- monochlorinated hexachloroxylene. The product is made to react with an organic acid in the presence of a Lewis acid catalyst and the obtained nucleus- monochlorinated aromatic dicarboxylic acid dichloride is separated by distillation.
Inventors:
UCHIYAMA SEIJI
Application Number:
JP10387891A
Publication Date:
November 04, 1992
Filing Date:
April 09, 1991
Export Citation:
Assignee:
MITSUBISHI GAS CHEMICAL CO
International Classes:
B01J27/128; C07B61/00; C07C17/12; C07C17/14; C07C17/38; C07C22/04; C07C25/125; C07C51/093; C07C63/72; (IPC1-7): B01J27/128; C07B61/00; C07C17/12; C07C17/14; C07C17/38; C07C22/04; C07C25/125; C07C51/093; C07C63/72