SELECTIVE HYDROGENATION OF MALEIC-ANHYDRIDE BY MODIFIED COPPER CHROMITE CATALYSTS

被引:0
|
作者
CASTIGLIONI, GL
GAZZANO, M
STEFANI, G
VACCARI, A
机构
[1] CNR,CFSM,I-40127 BOLOGNA,ITALY
[2] ALUSUISSE ITALIA,I-24020 SCANZOROSCIATE,ITALY
来源
HETEROGENEOUS CATALYSIS AND FINE CHEMICALS III | 1993年 / 78卷
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中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Cubic spinel-type phases containing an excess of copper ions may be obtained mainly by controlled oxidation of homogeneous copper-rich precipitates, via intermediate chromates. Part of the copper ions may be replaced by other bivalent cations, with corresponding changes in both thermal stability and catalytic properties. In particular the partial substitution of cadmium ions for copper ions gives rise to considerable deactivation in the hydrogenation of both gamma-butyrolactone (GBL) and maleic anhydride (MA), while substitution of zinc ions causes a slight decrease in the activity with GBL, but favours the hydrogenation of succinic anhydride (SA) to GBL. On the other hand, the partial substitution of magnesium ions for the copper ions gives rise to an increase in the productivity of GBL from MA, inhibiting the reactions of further hydrogenation and/or hydrogenolysis.
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页码:275 / 282
页数:8
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