Title:
【発明の名称】製造方法
Document Type and Number:
Japanese Patent JP2521890
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 diethyl ethoxysuccinate 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 ethoxysuccinate 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 diethyl maleate for use as feedstock for the hydrogenation process which is admixed with recycled diethyl succinate recovered from the fractionation zone.
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Inventors:
MAIKERU ANSONII UTSUDO
Application Number:
JP18952888A
Publication Date:
August 07, 1996
Filing Date:
July 28, 1988
Export Citation:
Assignee:
DEIBII PUROSESU TEKUNOROJII LTD
International Classes:
C07D307/33; B01D3/14; C07D315/00; (IPC1-7): C07D307/33; B01D3/14
Domestic Patent References:
| JP6393772A | ||||
| JP62501702A | ||||
| JP63500099A | ||||
| JP1500753A |
Attorney, Agent or Firm:
Suyama Saichi