Process for preparing dialkyl succinates

Details Process for preparing dialkyl succinates Process for preparing dialkyl succinates

1997-11-05

1999-02-16

Barts, Samuel

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

Organic compounds

Carboxylic acid esters

554121, C07C 6934

Patent

active

058722769

ABSTRACT:
Dialkyl maleates can be hydrogenated with hydrogen in a catalytic liquid-phase hydrogenation to give dialkyl succinates, wherein the hydrogenation is carried out continuously at a pressure of from 50 to 400 bar and a reaction temperature of from 30 to 160.degree. C. over a fixed bed of oxygen-free and support-free shaped bodies comprising pressed powders of the elements of the iron subgroup of transition group VIII of the Periodic Table of the Elements (Mendeleev) or their alloys or mixtures with one another with additions of elements of transition groups IV and/or V; hydrogenation-inert elements can additionally be present. The shaped bodies have a compressive strength of from 20 to 220N and an internal surface area of from 10 to 100 m.sup.2 /g.

REFERENCES:
patent: 5606099 (1997-02-01), Darsow

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