Abstract: An improved process employing a supported, platinum-containing, crystalline, silicate molecular sieve catalyst composition effective in removing ethylbenzene from unextracted xylene feeds during isomerization, primarily by hydrodeethylation, and also the primarily C.sub.9 paraffins and naphthenes. Choosing (1) a set of process conditions within narrow ranges of temperature T, total pressure P, and hydrogen to hydrocarbon mol ratio H/HC such that Z, which is defined as a function of T, P and H/HC, is less than about 0.01, and (2) a platinum-containing catalyst composition, greatly reduces the feed C.sub.9 paraffins and naphthenes content during isomerization, removes most of the ethylbenzene by hydrodeethylation to ethane and benzene, and minimizes xylene loss to hydrogenation and cracking, all without substantially changing the excellent isomerization properties of the sieve catalyst composition.

Abstract: Melt-processable polyaramide and polyarylate polymers and copolymers are made employing a component containing the 5-t-butylisophthaloyl moiety and aromatic diamines or aromatic diols. The melt processability of these polymers can eliminate expensive processing in making shaped articles. The claimed materials are useful for making fiber, film, laminates, coatings, adhesives and molded objects.

Abstract: Described are catalyst mixtures comprising a HAMS-1B crystalline borosilicate molecular sieve incorporated into an inorganic matrix component and a molybdenum on silica component. These mixtures when used to isomerize unextracted xylene streams containing ethylbenzene to mixtures rich in paraxylene demonstrate improved paraffins and naphthenes conversion to light hydrocarbons and convert most of the ethylbenzene by a hydrodeethylation mechanism to benzene and ethane.

Abstract: A process for the catalyzed conversion fo oximes such as cyclohexanone oxime to amides such as caprolactam via a high conversion, high selectivity, long catalyst lifetime reaction over a HAMS-1B crystalline borosilicate-based catalyst composition.

Abstract: Partially soluble, film-forming polyimides and their copolymers made using 3,5-diaminobenzotrifluoride are described. Thin films and coatings of these materials are relatively colorless and the polymers have a high Tg, excellent thermal stability, lower moisture uptake, and lower dielectric constant. They are useful as films, fibers, molded articles and as protective coatings, interlevel dielectrics, electric circuit substrates and the like for the electronics industry.

Abstract: The catalyzed oxidative alkoxycarbonylation of amines and substituted amines to form carbamates is disclosed. The process involves alkoxycarbonylation in the presence of a palladium-based catalyst using carbon monoxide, an alkanol and an oxygen-transer agent.

Abstract: The preparation, structure, and properties of solid inorganic materials containing cobalt, boron, oxygen and, optionally, aluminum, is described. Also described is the use of such materials in catalytic compositions for the conversion of organic compounds. In particular, the new material Co(BO.sub.2)OH is described as well as the use of such material in various catalyzed processes including oxidation of organic compound processes. A particularly useful process is a heterogeneous catalyzed partial oxidation of an alkylaromatic followed by complete oxidation to an aromatic polycarboxlic acid in a water phase.

Abstract: Magnesium-aluminum, hydrotalcite-type clay compositions containing large, pillaring organic, inorganic, and mixed organic/inorganic anions have been made. Heating of the mixed large organic/inorganic anion hydrotalcite-type clays can lead to substantially complete removal of the organic anions and a route to making large, inorganic-anion, hydrotalcite-type clays with more open galleries. These materials are shown to catalyze hydrocarbon conversion reactions.

Abstract: Ammonolysis-alkylation using a C.sub.1 to C.sub.8 alkanol and ammonia is used to prepare cyclic N-alkylated compounds in a one-step process. In the presence of hydrogen added as a reducing agent, a reduced N-alkylated compound can be formed.

Abstract: Esters of carboxylic acids of the formula RCH.sub.2 COOR"' and R'CH:C(R")COOR"' are reacted to form a carboxylic acid and an aliphatic alcohol R"'OH wherein R, R', and R" are individually selected from the group consisting of --H, alkyl moieties of from 1 to 18 carbon atoms and aralkyl moieties, cycloalkyl moieties and alkylaryl moieties of 3 to 18 carbon atoms and R"' is an alkyl moiety of 1 to 18 carbon atoms in the presence of an AMS-1B borosilicate crystalline molecular sieve catalyst under reaction conditions.

Abstract: An improved process for making N-alkylpyrrolidones from a maleic derivative or a succinic derivative which involves catalytically reducing the maleic derivative with hydrogen to succinic anhydride, if the maleic derivative is the starting point, converting succinic anhydride to a N-alkylsuccinimide by ammonolysis-alkylation with a C.sub.1 and C.sub.4 alkanol and ammonia, and catalytically reducing the resulting N-alkylsuccinimide to the N-alkylpyrrolidone.

Abstract: Described are magnesium compound-impregnated catalyst compositions comprising a gallium-modified, crystalline silica molecular sieve, essentially free of aliminum, composited in an inorganic matrix. Said compositions are useful fro hydrocarbon conversion, particularly the selective ethylation of toluene in which they exhibit extremely high paraselectivity at an excellent percent conversion.

Abstract: A catalyst and process for production of an alpha, beta-ethylenically unsaturated monocarboxylic acid made by condensing formaldehyde with, for example, propionic acid, which catalyst is made from a SiO.sub.2 -SnO.sub.2 mixed-oxide component consisting of porous silica gel and tin (IV) oxide and a cesium ion component.

Abstract: A process for the catalyzed oligomerization of ethylene to a product rich in linear C.sub.4 olefins using a catalyst composition made by incorporating a major amount of HAMS-1B crystalline borosilicate molecular sieve composited in an inorganic matrix or an amorphous, silica-alumina support with minor amounts of a nickel compound and a zinc compound and calcining the result to form a composite containing supported zinc and nickel oxides.

Abstract: A gas-phase isomerization process wherein a feed containing one or more members of the 2,6-DMN isomer triad is selectively isomerized over a lower-acidity, supported, molecular-sieve-based catalyst composition to form essentially thermodynamic equilibrium amounts of the members of the 2,6-triad and reduced amounts of outside-the-triad products.

Abstract: A gas-phase isomerizaiton process wherein a feed containing one or more members of the 2,7-DMN isomer triad is selectively isomerized over a lower-acidity, supported, molecular-sieve-based catalyst composition to form essentially equilibrium amounts of the members of the 2,7-triad and reduced amounts of outside-the-triad products.

Abstract: A method for the selective gas-phase equilibration of at least one C.sub.3 or greater monoalkene over a HAMS-1B crystalline borosilicate-based catalyst composition employing operating conditions in which the total butylene and t-amylene C.sub.5 and lower fraction of the product are maximized and the formation of C.sub.1 to C.sub.3 hydrocarbons, total aromatics and total paraffins are minimized. In another aspect of the invention the equilibration product is usefully separated by converting the isobutylene and t-amylene fractions to their methyl ethers by reaction with methanol.

Abstract: Magnesium-aluminum, hydrotalcite-type clay compositions containing large, pillaring organic, inorganic, and mixed organic/inorganic anions have been made and shown to demonstrate catalytic properties. Heating of the mixed large organic/inorganic anion hydrotalcite-type clays can lead to substantially complete removal of the organic anions and a route to making large, inorganic-anion, hydrotalcite-type clays with more open galleries.

Abstract: A method for placing catalytically active alkali metal ion on a catalyst support to make an in situ catalyst is disclosed. Specifically, the method contemplates providing a quantity of a suitable catalyst support in a particulate form, providing a gaseous feed stream containing a predetermined amount of the alkali metal ion in the form of a volatile alkali metal compound, and contacting the catalyst support with the volatile alkali metal ion-containing feed stream for a time period sufficient to deposit at least some of the alkali metal present in the feed stream onto the thus-contacted catalyst support.

Abstract: Para selectivity in the conversion of a monosubstituted benzene containing a meta-directing group to disubstituted benzenes can be substantially enhanced by carrying out the reaction in the gas phase with an inorganic or organic substitution agent in the presence of a catalyst composition comprising a crystalline molecular sieve material. In particular, nitrobenzene can be converted using nitrogen dioxide in the gas phase to a product containing an augmented proportion of para-dinitrobenzene using a wide range of catalyst compositions comprising both synthetic and naturally occurring crystalline molecular sieve materials such as ferrierites, X-type zeolites, Y-type zeolites, silicalite, framework-modified silicalites, ZSM aluminosilicates, AMS-1B borosilicates, and AlPO.sub.4 types.