Abstract: A method for the acid catalyzed cyclization of an alkenylbenzene feedstock to a dimethyltetralin in a liquid phase reaction wherein the desired dimethyltetralin is removed from the reaction mixture by distillation simultaneously with the addition of the feedstock to the reaction mixture.

Abstract: A group of polyimides and copolyimides made from 2,2-bis(3,4-dicarboxyphenyl)hexafluoropropane dianhydride (6FDA) or 2,2-bis(3,4-dicarboxyphenyl)propane dianhydride (IPAN) their acid or ester forms and selected aromatic diamines are disclosed which are useful for substrate coatings and interlevel dielectrics in on-chip and multi-chip package applications. In such applications these polymers exhibit lower dielectric constant, lower moisture uptake and reduced dielectric constant variation with temperature and humidity than existing polymers, yet they are both thermally stable at required processing temperatures and can form suitably adherent, pinhole-free coatings on electronic component substrates.

Abstract: The preparation, structure, and properties of solid inorganic materials containing aluminum, boron, oxygen and at least one Group VIII metallo element, selected from the group consisting of cobalt and nickel is described. Also described is the use of such materials in catalytic compositions for the conversion of organic compounds. In particular, the new materials having the general formula:(x)(M.sub.m :M'.sub.n)O.(y)Al.sub.2 O.sub.3.(z)B.sub.2 O.sub.

Abstract: A process for preparing purified dimethyl-2,6-naphthalenedicarboxylate by the esterification of 2,6-naphthalenedicarboxylic acid is disclosed and which process provides for the efficient removal of the mono methyl ester of 2,6-naphthalenedicarboxylic acid produced during the esterification reaction.

Abstract: A method for purifying a naphthalenedicarboxylic acid comprising contacting an impure naphthalenedicarboxylic acid with hydrogen in the presence of a hydrogenation catalyst and a solvent comprising a low molecular weight carboxylic acid, at a temperature of at least about 500.degree. F., and a pressure sufficient to maintain the solvent at least partially in the liquid phase and thereafter recovering purified naphthalenedicarboxylic acid.

Abstract: A process for preparing purified dimethyl-2,6-naphthalenedicarboxylate by the esterification of 2,6-naphthalenedicarboxylic acid is disclosed, and which process provides for the efficient removal of residual oxidation catalyst metals from the dimethyl-2,6-naphthalenedicarboxylate and efficient removal of particulate contaminants.

Abstract: An olefins process is described which combines cracking of a hydrocarbon feedstock with the coupling of methane using an oxygen-affording gas such that the heat evolved in the exothermic methane coupling reaction is effectively transferred to the endothermic cracking process in a manner which does not allow the non-hydrocarbon products in the effluent of the methane coupling reaction to mix with the effluent of the cracking process. By combining the cryogenic requirements of the two processes, the refrigeration used in air liquifaction to separate oxygen for the methane coupling process can provide refrigerant nitrogen to liquify one or more of methane, ethylene and propylene which can be used in the cryogenic separation of the C.sub.2 + hydrocarbon products in the cracking process effluent.

Abstract: A direct and simplified process is described for making anionic clays having the hydrotalcite structure which contain as the intercalating anion a pH-dependent, essentially carbonate-free, inorganic anion. Hydrotalcite-type clays made by the process from a number of divalent and trivalent metal ions and pH-dependent, boron-containing anions and transition element metalates are useful in the conversion of hydrocarbons.

Abstract: A method and a system for extending useful life of a basic catalyst are disclosed. The basic catalyst comprises a particulate, porous, siliceous catalyst support and an alkali metal in the +1 oxidation state on the catalyst support surface. The catalyst is suitable for the synthesis of an alpha, beta-ethylenically unsaturated carboxylic acid by condensation of a saturated carboxylic acid with formaldehyde. The method of the present invention contemplates providing a reactor, or a series of reactors, containing the basic catalyst and a confined source of the alkali metal associated with a suitable carrier, upstream of the reactor or reactors. A feed stream to the reactor is passed first through the confined source and thereafter through the reactor while reaction conditions for the condensation reaction are maintained within the reactor. The temperature of the feed stream passing through the confined source can be modulated to control release of the alkali metal from the carrier.

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

Abstract: A method for reducing the formation of dust produced by solid aromatic anhydrides, and aromatic anhydride compositions that have a reduced tendency to emit aromatic anhydride dust, are disclosed. The method comprises treating the aromatic anhydride with low levels of suitable organic compounds.

Abstract: There is provided a process for the conversion of a feedstream comprising gaseous and/or liquid feed materials to a desired products by means of catalytic distillation employing a catalyst-packing material comprising a rigid, cellular monolith or a rigid, cellular monolith coated with a catalytically-active material.Preferred rigid, cellular monoliths are ceramic honeycomb monoliths.

Abstract: A process for making a magnesium-containing supported titanium-containing and vanadium-containing catalyst or catalyst component for the polymerization or copolymerization of alpha-olefins.

Abstract: Conversion of alcohol to organic compounds which comprises contacting the alcohol with a heterogeneous catalyst composition comprising crystallineCu.sub.2-X Cr.sub.y Al.sub.6-y B.sub.4 O.sub.17 M.sub.m M'.sub.nwhere M is a divalent metal, M' is a monovalent metal, m is a number in a range from 0 to 0.8, n is a number in a range from 0 to 1.6, X is a number in a range from 0 to 10 0.8 and is equal to the sum of m and n/2, and y is a number in a range from 0.01 to 3, having a characteristic X-ray diffraction pattern.

Abstract: Epoxy resins containing epoxidized polybutenes and a process for preparing them are disclosed. The cured epoxy resin containing epoxidized polybutene is useful as a coating or a composite and demonstrates improved flexibility and ductility and improved chemical and water resistance with no loss in heat deflection temperature.

Abstract: A process for making a magnesium-containing supported titanium-containing, alpha-olefin polymerization or co-polymerization catalyst or catalyst component having a large particle size, semi-spherical particle shape and high resistance to attrition.

Abstract: The 4,2'-disubstituted diphenyl carbonate or, optionally, ether content of regioimpure mixtures of compounds of formula: ##STR1## where X is F, Cl, and NO.sub.2, can be decreased to essentially zero starting with o-, m- and p-containing regioimpure mixtures by treating with the corresponding m- or p-substituted phenol and, optionally, a decarboxylation catalyst and removing the o-substituted phenol produced by volatilization or recrystallization from a solvent.

Abstract: A process for the manufacture of adipic acid is disclosed. In this process, cyclohexane is oxidized in an aliphatic monobasic acid solvent in the presence of a soluble cobalt salt wherein water is continuously or intermittently added to the reaction system after the initiation of oxidation of cyclohexane as indicated by a suitable means of detection, and wherein the reaction is conducted at a temperature of about 50.degree. C. to about 150.degree. C. at an oxygen partial pressure of about 50 to about 420 pounds per square inch absolute.

Abstract: A multistage method for making a homopolymer or copolymer of an alpha-olefin having increased stiffness and broadened molecular weight distribution.

Abstract: Improved mixing performance with reduced power input is obtained in an agitated oxidation reactor for converting an aromatic alkyl to the corresponding aromatic carboxylic acid by decreasing the clearance between the lowermost impeller element and the reactor bottom and by providing a flat blade turbine as the upper impeller element.