Standard Oil Company (indiana)

Amoco Corporation

Michael M Schwartz

Edward E Paschke

Wassily W Poppe

Ivor R Fielding

Leonard E Stark

Jack R Knox

James P Whelan

This invention pertains to the production of high purity iso- or terephthalic acid by the catalytic liquid phase oxidation of m- or p-xylene with molecular oxygen gas in the presence of a solvent system consisting essentially of 85 to 97 weight percent liquid benzoic acid and 15 to 3 weight percent water to provide a fluid feed for the purification of such phthalic acid by hydrogenation of the fluid effluent of such oxidation in the presence of a heterogeneous catalyst containing a Group VIII noble metal at an elevated temperature at which all the aromatic oxygen-containing products are in solution under the requisite elevated pressure to maintain a liquid phase of said solution followed by the precipitation of such phthalic acid from solution and the separation washing and drying of the precipitate. Such integration of process steps eliminates expensive and time consuming intermediate steps of precipitating impure iso- or terephthalic acid from oxidation effluent, separation, washing and drying said impure precipitate as well as purification of solvent for recycle to oxidation.

Direct continuous flow integration of production and purification of

Compositions comprising a blend of a polyarylate and a poly(methylenebenzoate) wherein said polyarylate is derived from a dihydric phenol and an aromatic dicarboxylic acid, said poly(methylenebenzoate) comprises poly(p-methylenebenzoate), poly(m-methylenebenzoate) and mixtures thereof. These compositions have improved processability relative to the polyarylate, have improved weatherability relative to the poly(methylenebenzoate) and are transparent.

Poly (p- and m-methylenebenzoate) blends with polyarylates

Powder coating a substrate with a polyolefin or preferably a polyolefin-polycarbonamide blend before contacting the substrate with a plastic resin creating a plastic-substrate seal, inhibits liquid and vapor transmission through the seal. The application of this invention to battery terminal bushings prevents unsightly corrosion about the battery terminal which is caused by 'wicking' of battery acid.

Inhibition of liquid and vapor transmission through plastic-substrate

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Aurora, IL, United States of America

Michael M Schwartz