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Title:
VAPOR-PHASE DEHYDROGENATION OF 1,4-BUTANEDIOL INTO GAMMA-BUTYROLACTONE
Document Type and Number:
Japanese Patent JPH10152485
Kind Code:
A
Abstract:

To provide a method which effects the subject reaction in the vapor phase advantageously from industrial, economical and environmental aspects in the presence of a catalyst composed of copper and Na2O supported by a carrier composed of SiO2 and CaO.

This method effects the subject reaction in the presence of free hydrogen by passing 1,4-butanediol over an immobilized phase of catalyst composed of 4 to 40wt.%, preferably 4 to 32wt.%, of copper and 0 to 5wt.%, preferably 0 to 2wt.%, of Na2O, each percentage being based on the total quantity of the catalyst, supported by a carrier composed of 80 to 100wt.%, preferably 90 to 100wt.%, of SiO2 and 0 to 20wt.%, preferably 0 to 10wt.%, of CaO, where the copper grains having an average diameter of 10 to 100nm are dispersed at a rate of 20 to 50% so as to have a surface area of 10 to 50m2/g over the carrier, under the conditions of temperature: 150 to 300°C, preferably 190 to 230°C, absolute pressure: 1 to 40 bar, preferably about 1 bar, and hourly space velocity of 1,4-butanediol: 0.2 to 20kg, preferably 0.5 to 7.5kg, per kg copper, with the carrier gas containing free hydrogen being reused as the recycle gas.


Inventors:
MERCKER HANS JOCHEN DR
PAPE FRANK-FRIEDRICH DR
SIMON JOACHIM DR
HENNE ANDREAS DR
HESSE MICHAEL DR
KOEHLER ULRICH DR
DOSTALEK ROMAN DR
FREIRE ERDBRUEGGER CRISTINA DR
KRATZ DETLEF DR
Application Number:
JP23922397A
Publication Date:
June 09, 1998
Filing Date:
September 04, 1997
Export Citation:
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Assignee:
BASF AG
International Classes:
C07D307/33; B01J23/78; C07B61/00; C07D307/32; C07D315/00; B01J23/72; (IPC1-7): C07D307/33; B01J23/78
Attorney, Agent or Firm:
Toshio Yano (2 outside)