Title:
【発明の名称】1,4-ブタンジオールの製造法
Document Type and Number:
Japanese Patent JP2002512996
Kind Code:
A
Abstract:
A process for preparing 1,4-butanediol and, if desired, gamma-butyrolactone and THF by oxidizing butane or benzene to form a product stream including maleic anhydride, absorbing maleic anhydride from the product stream with a high-boiling inert solvent in an absorption stage to give a liquid absorption product, esterifying the liquid absorption product with a C1-C5 esterifying alcohol in an esterification stage to form an esterification product comprising the corresponding diester and high-boiling inert solvent, then hydrogenating the esterification product to give a hydrogenation product which comprises the products of value, 1,4-butanediol and, if desired, gamma-butyrolactone and tetrahydrofuran and the esterifying alcohol and which is separated by distillation into the products of value and the esterifying alcohol, and recycling the esterifying alcohol to the esterification zone, which comprises separating the esterification product into the diester and the inert solvent by distillation under reduced pressure prior to the hydrogenation, recycling the inert solvent to the absorption stage, and hydrogenating the diester in the liquid phase over a fixed-bed catalyst.
Inventors:
Rolf Fisher
Gerd Kybel
Rolf Pincos
Ralph-Thomas Lane
Gerd Kybel
Rolf Pincos
Ralph-Thomas Lane
Application Number:
JP2000545820A
Publication Date:
May 08, 2002
Filing Date:
April 16, 1999
Export Citation:
Assignee:
BASF Akchen Gezel Shaft
International Classes:
C07C29/149; C07C29/17; C07C31/20; C07C51/16; C07C67/03; C07C67/08; C07C69/60; C07D307/08; C07D307/32; C07D307/33; C07D315/00; (IPC1-7): C07C29/149; C07C29/17; C07C31/20; C07C67/08; C07C69/60; C07D307/08; C07D307/33
Attorney, Agent or Firm:
Toshio Yano (4 outside)