Method for making oxalic acid diesters

Details Method for making oxalic acid diesters Method for making oxalic acid diesters

1984-11-05

1986-10-28

Trousof, Natalie

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

Organic compounds

Carboxylic acid esters

560190, 560193, C07C 6736

Patent

active

046200290

ABSTRACT:
A method for making a diester of oxalic acid which comprises oxidatively carbonylating an alcohol having 1 to 10 carbon atoms with carbon monoxide and with oxygen at a pressure from 1 to 700 bars and at a temperature from 20.degree. C. to 250.degree. C. in a reaction phase comprising said alcohol having dissolved therein a catalyst system consisting essentially of, as cations, ions of palladium(II) and copper ions in a molar ratio of at least 0.2 and, as anions, halide ions and carboxylate ions having 1 to 6 carbon atoms, the amounts of all ions in said catalyst system being such that the solution of the cations and anions in the alcohol has a formal pH value, as determined electrometrically, between 8 and 5.

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patent: 4005129 (1977-01-01), Zehner et al.
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patent: 4138587 (1979-02-01), Yamasaki
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Kirk-Othmer, Encyclopedia of Chemical Technology, vol. 7, Interscience, p. 725, (1967).

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