发明名称 |
METHOD FOR THE PRODUCTION OF 1,4- BUTANE-DIOL BY COMBINED GAS-PHASE AND LIQUID-PHASE HYDROGENATION |
摘要 |
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 C<SUB>4</SUB>-dicarboxylic acids and/or of derivatives thereof having the following steps: a) introducing a gas stream of a C<SUB>4</SUB>-dicarboxylic acid or of a derivative thereof at from 200 to 300° C. and from 2 to 60 bar into a first reactor and catalytically hydrogenating it to a product which contains mainly optionally alkyl-substituted gamma-butyrolactone; b) converting the product stream into the liquid phase; c) introducing the product stream obtained in this way into a second reactor at a temperature of from 100° C. to 240° C. and a pressure of from 20 to 250 bar and catalytically hydrogenating it in the liquid phase to optionally alkyl-substituted 1,4-butanediol; d) removing the desired product from by-products and any unconverted reactants; e) optionally recycling unconverted intermediates into one or both hydrogenation stages, said hydrogenation stages both 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 a support, said second reactor having a higher pressure than said first reactor, and the product mixture removed from said first reactor being introduced without further purification into said second reactor. |
申请公布号 |
EP1515935(A1) |
申请公布日期 |
2005.03.23 |
申请号 |
EP20030740211 |
申请日期 |
2003.06.10 |
申请人 |
BASF AKTIENGESELLSCHAFT |
发明人 |
HESSE, MICHAEL;SCHLITTER, STEPHAN;BORCHERT, HOLGER;SCHUBERT, MARKUS;ROESCH, MARKUS;BOTTIKE, NILS;FISCHER, ROLF-HARTMUTH;WECK, ALEXANDER;WINDECKER, GUNTHER;HEYDRICH, GUNNAR |
分类号 |
B01J23/80;C07B61/00;C07C29/149;C07C31/20;(IPC1-7):C07C31/20 |
主分类号 |
B01J23/80 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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