Process for the preparation of succinic acid dialkyl esters

Details Process for the preparation of succinic acid dialkyl esters Process for the preparation of succinic acid dialkyl esters

1996-02-20

1997-02-25

Barts, Samuel

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

Organic compounds

Carboxylic acid esters

554121, C07C 6934

Patent

active

056060998

ABSTRACT:
Maleic acid dialkyl esters can be hydrogenated by a catalysed liquid phase hydrogenation with hydrogen to give succinic acid dialkyl esters by carrying out the hydrogenation continuously under a pressure of 50 to 400 bar at a reaction temperature of 30.degree. to 160.degree. C. over oxygen-free and support-free shaped bodies, arranged in a fixed bed, of compressed powders of elements of the iron sub-group of sub-group VIII of the Periodic Table or their alloys or mixtures with one another or their alloys or mixtures with elements of sub-group VI, and in addition hydrogenation-inert elements can be present. The shaped bodies have a compressive strength of 20 to 250 N and an internal surface area of 10 to 80 m.sup.2 /g.

REFERENCES:
patent: 3830830 (1974-08-01), Cleveland et al.
Chemical Abstracts, vol. 92, abstract No. 92:214359x, abstract of DE 2,837,022 (corresponds to EP '727), (1980).
Chemical Abstracts, vol. 105, abstract No. 105:152552F, abstract of DE 3,503,485 (corresponds to EP 190 424), (1986).

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