Process for preparing succinic anhydride

Details Process for preparing succinic anhydride Process for preparing succinic anhydride

1998-01-14

1999-09-14

Dentz, Bernard

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D30760

Patent

active

059525142

ABSTRACT:
Maleic anhydride can be hydrogenated to succinic anhydride with particularly high conversion rates by a catalytic liquid-phase hydrogenation with hydrogen, by carrying out the hydrogenation continuously at a pressure of 10 to 400 bar and a reaction temperature of 60 to 180.degree. C. on oxygen-free and support-free shaped bodies, which are arranged in the fixed bed, of compressed powders of the elements of the iron sub-group of group VIII of the Periodic Table, mixed or alloyed with elements of transition group IV and/or V; in addition, hydrogenation-inert elements can be present. The shaped bodies have a compressive strength of 20 to 220 N and an internal surface area of 10 to 100 m.sup.2 /g.

REFERENCES:
patent: 2198153 (1940-04-01), Coons et al.
patent: 5770744 (1998-06-01), Darsow
Patent Abstracts of Japan, Abstract of JP 08 245 611 (Sep. 24, 1996).
Gregg, et al., Adsorption, Surface Area and Porosity, London 1982, Chapter 2, p. 41, Chapter 6, p. 283.
F.M. Nelsen, et al., Determination of Surface Area: Adsorption Measurements by a Continuous flow Method, vol. 30, No. 8, (1958) pp. 1337-1390.
Chemical Abstracts, vol. 34, p. 5466 (1940) Kenneth W. Coons, Hydrogenation of Maleic Anhydride, abstract of referenced U.S. 2,198,153.
Chemical Abstracts 71047b, vol. 93, p. 912 (1980) A. Avots, et al., Succinic Anhydride, abstract of U.S.S.R. 721, 406.
English-language abstract of EP-722924 (Jul. 24, 1996).

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