Council of Scientific and Industrial Research

Abbas A Shaikh

Sivaram Swaminathan

A process for the preparation of mono-alkylcarbonate of bisphenols of the formula ##STR1## wherein R.sub.1 represents ispropylidene, hexa-fluoroisopropylidene, cyclohexane, sulphone, ketone, ether, phthaline, phthalimide and R.sub.2 represents an alkyl group with 1-8 carbon atoms the alkyl group being ethyl, propyl, butyl, hexyl, isopropyl, iso-butyl, tert-butyl, cyclohexyl which comprises reacting bisphenols of the formula ##STR2## where R.sub.1 represents ispropylidene, hexa-fluoroisopropylidene, cyclohexane, sulphone, ketone, ether, phthaline, phthalimide with dialkylcarbonates in presence of a catalyst selected from organometallic compounds of tin and titanium under inert atmosphere at a temperature in the range of 80.degree.-150.degree.C.

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Maharashtra, India

Abbas A Shaikh