Amoco Corporation

Gregory E Schmidt

Gary P Hagen

Thomas G Smith

John M Weis

Melvin L Luetkens, Jr

Lawrence D Lillwitz

John D Matlack

James G Villanueva

Bruce A Newman

James S Moore

A polyamide composition comprising the following recurring units: ##STR1## in proportions such that the mole ratio of the dicarboxylic acid moieties in the A, B and C units is about 49.5-0.5/0-20/0.5-49.5 and wherein R is a divalent radical comprising ##STR2## in a mole ratio of about 0.5-50/49.5-0 and preferably having a glass transition temperature of 90.degree. C. or greater and an oxygen transmission rate of about 2.0 cc-mil/100 in.sup.2 -day-atm or less.

Polyamide having improved gas barrier properties from adipic acid,

A regioselective acylation process is provided for coverting a 2-methylnaphthalene compound to a 2-acetyl-6-methylnaphthalene compound. The process is conducted under liquid phase conditions in an acylation inert solvent using a complexing agent which is regiospecific for the beta position of naphthalene and which is a thermally stable nitrohydrocarbon compound. Preferred such agents are nitrobenzene, o-nitrotoluene, and mesitylene. Also provided is a novel method for producing a 2-acetyl-6-methylnaphthalene compound of relatively high purity from isomer mixtures by recrystallization from a hydrocarbon solvent, such as n-octane, isooctane, or n-nonane.

2-acyl-6-methylnaphthalene preparation

A regioselective acetylation process is provided for converting a 2-methylnaphthalene compound to a 2-acetyl-6-methylnaphthalene compound. The process is conducted under liquid phase conditions using a new complexing agent which is regiospecific for the beta position of naphthalene and which is an electron-rich, carbon-based compound. A preferred such agent is hexamethylbenzene. Also provided is a novel method for producing a 2-acetyl-6-methylnaphthalene compound of relative high purity from isomer mixtures by recrystallization from a hydrocarbon solvent, such as n-octane, isooctane, or n-nonane.

Preparation of 2-acyl-6-methylnaphthalenes

Continuous Friedel-Crafts polymerization of propylene based feedstock in a polypropene reactor system to obtain viscous polypropene having a viscosity within the range of about 2 to about 200 centistokes, comprising: (a) continuously injecting water into the feed or the reactor at a monitored and controlled rate and (b) periodically increasing or decreasing the rate of water injection in response to deviations in the molecular weight of the polypropene product from a desired molecular weight.

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Batavia, IL, United States of America

Gregory E Schmidt