Amoco Corporation

Andreas B Ernst

Gary P Hagen

David A Palmer

Daniel B Pourreau

Howard B Yokelson

Gunter J Caspari

Patrick E McMahon

Wen-Dong Chang

John G Schaffhausen

Robert K Gipe

A method for the selective ethylation of 2-alkoxy-naphthalene compounds at the 6 position of the naphthalene nucleus is disclosed.

Preparation of 2-alkoxy-6-ethylnaphthalenes

An improved process is disclosed for preparation of silicon-containing aromatic polyacids by liquid phase oxidation of a silyl compound in the presence of oxygen and a catalyst comprising cobalt-manganese-bromine. 2-Trimethylsilyl-p-xylene is oxidized to 2-trimethylsilyl-terephthalic acid; 5-trimethylsilyl-m-xylene is oxidized to 5-trimethylsilyl-isophthalic acid, 2,5-bis (trimethylsilyl)-p-xylene is oxidized to 2,5-bis (trimethylsilyl)-terephthalic acid; 5-trimethylsilyl-pseudocumene is oxidized to 1,2,4-tricarboxy-5-trimethylsilyl benzene; and 1,3-bis-(p-tolyl)-tetramethyl-disiloxane is oxidized to 1,3-bis(p-carboxyphenyl)-tetramethyl-disiloxane.

Process for preparing silylated aromatic acids

A process is described to make a dihydroxydiphenol sulfone product with a 4,4'-dihydroxydiphenol sulfone purity in excess of 90 wt. % by reaction of phenol and concentrated sulfuric acid in a solvent mixture containing a lower-boiling and a higher-boiling hydrocarbon, removal by azeotropic distillation of water, hydrocarbon, and phenol, phase separation of the distillate, and return of at least the phenol to the reaction at a rate which maintains a phenol to sulfuric acid mol ratio in the reaction of at least 2 to 1.

Process for making 4,4'-dihydroxydiphenyl sulfone

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Glen Ellyn, IL, United States of America

Andreas B Ernst