Title:
【発明の名称】ガンマ-ブチロラクトンの製造方法
Document Type and Number:
Japanese Patent JPH0762012
Kind Code:
B2
Abstract:
A process is described for the production of substantially pure gamma-butyrolactone from a feed mixture containing a major amount of gamma-butyrolactone and a minor amount of diethyl succinate which comprises fractionally distilling the mixture in a fractionation zone in the presence of added diethyl maleate and recovering from the fractionation zone an overhead vaporous product comprising gamma-butyrolactone which is substantially free from diethyl succinate and a liquid bottom product comprising diethyl maleate and diethyl succinate in admixture one with another. This procedure can be used to separate a gamma-butyrolactone rich fraction obtained by distillation in one or more stages of a crude reaction product obtained by hydrogenation of a C4 dicarboxylic acid ester feedstock that contains a major molar amount of diethyl maleate and a minor molar amount of diethyl succinate, using a diethyl maleate feedstock from an esterification plant to provide both diethyl maleate for use in the fractionation zone and also diethyl maleate for use as feedstock for the hydrogenation process.
Inventors:
George Edwin Harrison
Norman Harris
Norman Harris
Application Number:
JP19363287A
Publication Date:
July 05, 1995
Filing Date:
August 01, 1987
Export Citation:
Assignee:
Davy Matuki-(London) Limited
International Classes:
C07D307/33; C07D315/00; (IPC1-7): C07D307/33
Attorney, Agent or Firm:
Suyama Saichi
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