E.i. Dupont De Nemours and Company

Michael Francis Vincent

Kiu-Seung Lee

Weiming Qiu

Anilkumar Raghavanpillai

An oligomer of the formula (I):CF(CH)[(CFCF)(CHCH)]G&#x2003;&#x2003;(I)wherein

Ethylene tetrafluoroethylene intermediates

A process for producing 3,4'diacetoxybenzophenone by first synthesizing 3,4&#x2032;dihydroxybenzophenone by reacting meta-hydroxybenzoic acid and phenol in the presence of a Lewis acid, and a protonic acid followed by reacting the 3,4&#x2032;dihydroxybenzophenone with an acetylating agent in the presence of an inorganic acid and activated carbon.

Process for producing 3,4' diacetoxybenzophenone

A process for synthesizing 3,4'dihydroxybenzophenone by reacting meta-hydroxybenzoic acid and phenol in the presence of a Lewis acid, and a protonic acid. Upon completion of the reaction the Lewis and protonic acids are removed and then the reaction product of 3,4&#x2032;dihydroxybenzophenone is contacted with water (at temperature not greater than 10&#xb0; C.) and ammonium hydroxide followed by filtration.

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West Chester, PA, United States of America

Michael Francis Vincent