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US 4,045,464 AGranted
Process for the preparation of aromatic carbonates
AssigneeAnic S.p.A.
InventorsUgo Romano, Renato Tesei
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Abstract
The invention relates to a process for preparing diaryl carbonates starting from phenyl alkyl carbonates, the reaction being carried out in the presence of suitable catalysts capable of affording greater yields and selectivity; the catalyst system is selected amongst the Lewis acids or the compounds of transition metals.
Claims4
A process for the preparation of aromatic carbonates of the formula:
- ##STR3## wherein R is selected from among the alkyl, alkoxy, aryl, aryloxy, NO.sub.2 groups, and hydrogen, comprising contacting the compound of the formula:
- ##STR4## wherein R has the same meaning as in Formula I and wherein R' is a non tertiary alkyl group, with a catalyst system comprised of titanium tetraphenate or titanium tetramethylate, at a temperature of 25.degree. - 350.degree. C and at a pressure of from 0.1 - 100 atmospheres absolute.
Dependencies are inferred from the claim text.