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Nokhum Davidovich Gilchenok

Valerian Mikhailovich Sobolev

Vladimir Avgustovich Yanshevsky

Rufina Alexandrovna Filippova

Viktor Karlovich Tsyskovsky

Jury Nikolaevich Juriev

Ljudmila Vasilievna Berezova

Evgeny Semenovich Zelikman

Jury Leonidovich Moskovich

Dmitry Vasilievich Mushenko

Vladimir Leonidovich Klimenko

A method for preparing dicarboxylic acids by subjecting cycloolefins to ozonolysis in a medium of lower monocarboxylic acids so as to form an ozonalyzate; treating the ozonalyzate with a solution of hydrogen peroxide; passing the thus obtained mixture through a solid acid catalyst, such as an Amberlite IR-120 cation-exchange resin; and subjecting the thus obtained catalyzed product first to thermal treatment at a temperature of from 50.degree. to 80.degree.C and then to thermal decomposition at a temperature of from 90.degree. to 110.degree.C to form desired dicarboxylic acids such as succinic, suberic or 1,10-decanedicarboxy acids, depending on the starting cycloolefin, in a yield 98 per cent of the theoretical value and of 99.5 per cent purity.

Method for preparing dicarboxylic acids

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Saint-Petersburg, Russia

Nokhum Davidovich Gilchenok