Abstract: A novel process for obtaining maleic anhydride having age molten and Hazen color below 125 after 20 hours at 140.degree. C., said process comprising polymerizing at a temperature of about 53.degree. to 90.degree. C. in the presence of metal chloride catalyst, color bodies present in crude maleic anhydride prior to fractionating the crude maleic anhydride and distilling off the purified maleic anhydride.

Abstract: Novel polyimides, copolyimides and molding compositions are prepared from novel dianhydrides such as tricyclo[6.4.0.0.sup.2,7 ] dodecane-3,6-diphenyl-1,8,4,5-tetracarboxylic acid dianhydride and tricyclo[6.4.0.0.sup.2,7 ] dodecane-1,8,4,5-tetracarboxylic acid dianhydride. The novel polyimides are useful as engineering plastics. The novel dianhydrides are useful for the preparation of the polyimides. Other dianhydrides can be mixed with our novel dianhydrides to make novel copolyimides useful as engineering plastics.

Abstract: Novel copolyimides and molding compositions are prepared from tetramethylcyclobutane-1,2,3,4-tetracarboxylic dianhydride and mixtures of diamines. Also glass and graphite filled polyimides are prepared. The polyimides are useful as engineering plastics.

Abstract: Injection moldable copolymers are prepared from fully or partially acylated aromatic diamines and aromatic tricarboxylic anhydride compounds, aromatic dicarboxylic acids or mixtures of aromatic tricarboxylic acid anhydrides and aromatic dicarboxylic acids. These copolymers are useful for the preparation of injection molded articles and fibers.

Abstract: Novel polyimides and molding compositions are prepared from novel tricyclo[4.2.1.0.sup.2,5 ] nonane-3,4 dimethyl-3,4,7,8-tetracarboxylic acid dianhydride. The dianhydride is useful for the manufacture of polyimides which are useful as engineering plastics.

Abstract: Novel polyimides and molding compositions are prepared from tetramethylcyclobutane-1,2,3,4-tetracarboxylic dianhydride and diamines. Also glass and graphite filled polyimides are prepared. The polyimides are useful as engineering plastics.

Abstract: Novel copolymers and terpolymers of the amide-imide type are prepared from tricarboxylic acid anhydride compounds, N,N'-diacylated diamines, N-acylated diamines, and primary diamines. These copolymers and terpolymers are useful for preparing injection molded articles of superior properties. A novel process for the manufacture of amide-imide copolymers and terpolymers is disclosed wherein the imide, imide-imide, amide, and amide-amide moieties incorporated into the polymer backbone can be controlled by acylating the amine functionality which is to form the amide and amide-amide moieties while reacting directly those diamines with a tricarboxylic anhydride compound which are intended to form the imide and imide-imide moieties.

Abstract: Trifluoromethylsulfonic acid has been found to be an extremely useful catalyst for the manufacture of mercaptans from olefins or viscous polyolefins and hydrogen sulfide. Also a novel process for the preparation of mercaptans is disclosed which proven comprises reacting olefins or polyolefins at a temperature of about -10.degree. to 70.degree. C. with hydrogen sulfide under pressure of about 1 to 10 atmospheres in the presence of about 0.05 to 10 percent by weight of the olefins of the trifluoromethylsulfonic acid. The mercaptans produced according to the novel process are useful in the preparation of nonionic surfactants for lubricating oils and in the enhanced oil recovery as well as for biocides. Novel beta-polybutenylsulfoxy-alpha-hydroxyethylbenzenes have also been prepared. These are useful in the preparation of nonionic surfactants for lubricating oils and as biocides.

Abstract: A novel catalyst for the oxidation of butane to produce maleic anhydride comprising a phosphorus and vanadium mixed oxide promoted by zinc wherein the catalyst is prepared by using an organic medium and has two specific phases identified by characteristic X-ray pattern. A process for the manufacture of maleic anhydride from butane feedstock utilizing the novel catalyst.

Abstract: A novel catalyst for the oxidation of butane to produce maleic anhydride comprising a phosphorus and vanadium mixed oxide promoted by uranium wherein the catalyst is prepared by using an organic medium and has two specific phases identified by characteristic X-ray pattern. A process for the manufacture of maleic anhydride from butane feedstock utilizing the novel catalyst.

Abstract: A novel process for the preparation of injection moldable polymers prepared from diacylated aliphatic diamines, tricarboxylic anhydride compounds and aliphatic primary diamines. These polymers are useful for the preparation of injection molded articles and fibers. A process for enhancing the crystallization of these polymers by the addition of nucleating agents is also disclosed.

Abstract: A novel process for the preparation of injection moldable polymers prepared from diacylated aliphatic diamines, tricarboxylic anhydride compounds and aliphatic primary diamines. These polymers are useful for the preparation of injection molded articles and fibers. A process for enhancing the crystallization of these polymers by the addition of nucleating agents is also disclosed.

Abstract: Novel copolymers and molding compositions are prepared from acyl halide derivatives of dicarboxylic acids, acyl halide derivatives of tricarboxylic aromatic anhydrides and aromatic diamines. Also glass filled copolymers are prepared. The copolymers are useful as engineering plastics.

Abstract: Injection moldable copolymers are prepared from fully or partially acylated aromatic diamines and aromatic tricarboxylic anhydride compounds or mixtures of tricarboxylic anhydrides and dicarboxylic acids. These copolymers are useful for the preparation of injection molded articles and fibers.

Abstract: Color stable compositions consisting of aromatic polyester and 0.01 to 0.5% by weight of the aromatic polyester of a stabilizer selected from the group consisting of phosphates, phosphonates and mixtures of either phosphates or phosphonates with epoxides having a boiling point of above about 250.degree. C. These compositions are useful in the manufacture of engineering plastics such as automobile headlights.

Abstract: Novel tailor made copolymers and terpolymers of the amide-imide type are prepared from tricarboxylic acid anhydride compounds, N,N'-diacylated diamines, N-acylated diamines, and primary diamines. These copolymers and terpolymers are useful for preparing injection molded articles of superior properties. A novel process for the manufacture of amide-imide copolymers and terpolymers is disclosed wherein the imide, imide-imide, amide, and amide-imide moieties incorporated into the polymer backbone are controlled by acylating the amine functionality which is to form the amide and amide-amide moieties while reacting directly those diamines with a tricarboxylic anhydride compound which are intended to form the imide and imide-imide moieties.

Abstract: Novel terpolymers of the amide-imide type are prepared from tricarboxylic-acid-anhydride derivatives, aromatic diamino quinones and two other wholly-aromatic primary diamines. The novel terpolymers are useful for preparing molded articles of superior properties at injection molding temperatures lower than required for molding the amide-imide copolymers disclosed in the prior art.

Abstract: A novel, heterogeneous catalyst is useful in an improved process for the production of aldehydes and alcohols from olefinic hydrocarbons in the presence of carbon monoxide and hydrogen. The catalyst consists of a polyphenylene substrate to which are bonded diphenylphosphine ligands complexed with a metal carbonyl, such as cobalt carbonyl. The catalyst has excellent thermal stability, is essentially insoluble in the reactants or reaction products, and is active in the hydroformylation reaction at a temperature of about 195.degree. C and a pressure of about 500 psig.

Abstract: A novel, heterogeneous catalyst is useful in an improved process for the production of aldehydes and alcohols from olefinic hydrocarbons in the presence of carbon monoxide and hydrogen. The catalyst consists of a polyphenylene substrate to which are bonded diphenylphosphine ligands complexed with a metal carbonyl, such as cobalt carbonyl. The catalyst has excellent thermal stability, is essentially insoluble in the reactants or reaction products, and is active in the hydroformylation reaction at a temperature of about 195.degree. C and a pressure of about 500 psig.

Abstract: Polyamide-imides are prepared by reacting trimellitic acid with an aromatic or an aliphatic diamine in the molar ratio of about 1:0.55 to 1:0.95 and then reacting this product with at least 0.45 to about 0.75 moles to about 0.05 to about 0.35 moles of an aromatic diisocyanate. The products are useful as wire enamels and coatings when they are formulated into wire enamels and coated on electrical conductors. They may also be used as molding resins.