Title:
PRODUCTION OF DIMETHYL MALEATE
Document Type and Number:
Japanese Patent JPS63258832
Kind Code:
A
Abstract:
An improved process for the preparation of dimethylmaleate by the esterification of maleic acid anhydride, maleic acid monomethylester, maleic acid or mixtures thereof with methanol in the presence of catalytic quantities of sulphuric acid, which comprises carrying out the esterification reaction within 20 to 120 minutes in a multistage bubble cap column reactor at temperatures of from 90 DEG to 140 DEG C. and with methanol excesses of from 0.4 to 2.0 mole per mole of the dimethylmaleate to be produced.
Inventors:
BERUNTO MAKOFUKA
HANSUUDEIITAA BUROTSUKU
HANSUUDEIITAA BUROTSUKU
Application Number:
JP6991288A
Publication Date:
October 26, 1988
Filing Date:
March 25, 1988
Export Citation:
Assignee:
BAYER AG
International Classes:
B01J27/02; C07B61/00; C07C67/08; C07C69/60; (IPC1-7): B01J27/02; C07C67/08; C07C69/60
Attorney, Agent or Firm:
Heiyoshi Odashima
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