Exxonmobil Chemical Patents Inc.

Etienne Mazoyer

Helge Jaensch

James Richardson Lattner

Kun Wang

Lorenzo C DeCaul

Ali A Kheir

Javier Guzman

Monica D Lotz

Steven Webster Levine

Michele L Paccagnini

Kevin B Daly

Constantinos P Bokis

Processes are described for purifying a biphenyldicarboxylic acid product containing one or more impurities, particularly at least formylbiphenylcarboxylic acid. In the processes, a mixture comprising the biphenyldicarboxylic acid product is contacted with hydrogen in the presence of a hydrogenation catalyst under conditions to selectively reduce at least part of the formylbiphenylcarboxylic acid to produce a hydrogenation effluent comprising (i) hydroxymethylbiphenylcarboxylic acid and/or methylbiphenylcarboxylic acid, and (ii) biphenylcarboxylic acid. At least a portion of the biphenyldicarboxylic acid is then separated from the hydrogenation effluent. Advantageously, a polyester product may be produced from the separated biphenyldicarboxylic acid.

Preparation and purification of biphenyldicarboxylic acids

Catalysts and processes for producing catalysts for neopentane production are provided herein. A process includes reducing a catalyst precursor comprising a transition metal and an inorganic support at a temperature less than 500&#xb0; C. to produce a catalyst. Also provided herein are processes to produce neopentane using the catalysts described herein and neopentane compositions produced therefrom.

Catalysts and processes for making catalysts for producing neopentane

Disclosed herein are processes for producing neopentane. The processes generally relate to demethylating isooctane to produce neopentane. The isooctane may be provided by the alkylation of isobutane with butylenes.

Production of neopentane

Processes for producing neopentane are disclosed herein. Processes comprise demethylating a C-Calkane within a shell and tube reactor to produce a demethylation product including at least 10 wt % neopentane based on the weight of the demethylation product.

Processes to make neopentane using shell and tube reactors

Disclosed herein are processes for producing neopentane. The processes generally relate to demethylating neohexane and/or neoheptane to produce neopentane. The neohexane and/or neoheptane may be provided by the isomerization of C-Cparaffins.

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Woluwe Saint Pierre, Belgium

Etienne Mazoyer