Title:
1,4-ブタンジオールの製造方法
Document Type and Number:
Japanese Patent JP2005533776
Kind Code:
A
Abstract:
The present invention relates to a process for preparing optionally alkyl-substituted 1,4-butanediol by two-stage catalytic hydrogenation in the gas phase of C4-dicarboxylic acids and/or of derivatives thereof having the following steps: a) introducing a gas stream of a C4-dicarboxylic acid or of a derivative thereof at from 200 to 300° C. and from 10 to 100 bar into a first reactor or into a first reaction zone of a reactor and catalytically hydrogenating it in the gas phase to a product which contains mainly optionally alkyl-substituted gamma-butyrolactone; b) introducing the product stream obtained in this way into a second reactor or into a second reaction zone of a reactor at a temperature of from 140° C. to 260° C. and catalytically hydrogenating it in the gas phase to optionally alkyl-substituted 1,4-butanediol; steps a) and b) being carried out at the same pressure; c) removing the desired product from intermediates, by-products and any unconverted reactants; d) optionally recycling unconverted intermediates into one or both hydrogenation stages, said hydrogenation stages each using a catalyst which comprises <=95% by weight, preferably from 5 to 95% by weight, in particular from 10 to 80% by weight, of CuO, and >=5% by weight, preferably from 5 to 95% by weight, in particular from 20 to 90% by weight, of an oxidic support, and the product mixture removed from the first hydrogenation stage being introduced without further purification into the second hydrogenation stage.
Inventors:
Michael hesse
Stephan shritter
Holger Borchert
Marx Schubert
Marx Leche
Nils Bottke
Rolf-Hartmut Fisher
Alexander Veck
Gunter Windecker
Gunner Heydrich
Stephan shritter
Holger Borchert
Marx Schubert
Marx Leche
Nils Bottke
Rolf-Hartmut Fisher
Alexander Veck
Gunter Windecker
Gunner Heydrich
Application Number:
JP2004511244A
Publication Date:
November 10, 2005
Filing Date:
June 10, 2003
Export Citation:
Assignee:
BASF Aktiengesellschaft
International Classes:
C07B61/00; C07C29/149; C07C31/20; (IPC1-7): C07C29/149; C07C31/20
Attorney, Agent or Firm:
Toshio Yano
Toshiomi Yamazaki
Takuya Kuno
Einzel Felix-Reinhard
Reinhard Einsel
Toshiomi Yamazaki
Takuya Kuno
Einzel Felix-Reinhard
Reinhard Einsel