Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...
Patent
1991-02-19
1992-06-02
Ivy, C. Warren
Organic compounds -- part of the class 532-570 series
Organic compounds
Heterocyclic carbon compounds containing a hetero ring...
C07D30733
Patent
active
051188210
ABSTRACT:
A process for producing gamma-butyrolactone by catalytic hydrogenation of maleic anyhydride in the liquid phase with hydrogen, at a high temperature and under pressure, in the presence of a catalyst comprising nickel and palladium deposited on a support, wherein said support is a silica based support having a very high specific surface area , the value of which may range from 50 m.sup.2 /g, preferably from about 100 m.sup.2 /g to about 800 m.sup.2 /g and more.
Very high conversion rates of 90-98 mole % and excellent selectivities to gamma-butyrolactone of 95 to 97 mole % are achieved by the process.
REFERENCES:
patent: 3994928 (1976-11-01), Michalczyk et al.
patent: 4087476 (1978-05-01), Hayes
Dallons Jean-Luc
Jacobs Pierre
Martens Johan
Tastenhoye Paul
Van Gysel August
Ivy C. Warren
Trinh Ba K.
U C B S.A.
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