Method for the preparation of alkylenecarbonates

Details Method for the preparation of alkylenecarbonates Method for the preparation of alkylenecarbonates

C - Chemistry, Metallurgy

07

D

260/352.7

C07D 317/36 (2006.01)

Patent

CA 1076590

ABSTRACT OF THE DISCLOSURE : In the preparation of alkylene carbonates having alkyl, aryl, cycloalkyl and aralkyl substituents, the corresponding alkylene oxides are reacted with carbon dioxide, the catalyst being a combination of a protic substance having the formula ROH, wherein R is either hydrogen or a radical as enumerated above, with a nitro- geneous basic substance selected from the group constituted by dimethylaniline, triethylamine, pyridine and a basic nitrogeneous resin which is insoluble in the reaction medium. The minor component (by weight) of catalyst being present in the range from 0.1% to 30% by weight of the alkylene oxide. The reaction is carried out at temperatures ranging from 0°C to 200°C and under a pressure comprised between 1 and 100 atmospheres.

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