Abstract: A catalyst for reducing nitrogen oxides in the exhaust gas with ammonia, having a catalyst composition coated on an inorganic fiber cloth as a substrate is provided. The inorganic fiber cloth is impregnated with at least one inorganic oxide selected from silica and said catalyst composition, preferably with an organic binder like polyvinyl alcohol, so that the weight ratio of the inorganic oxide/said inorganic fiber cloth is in the range of 0.05 to 0.8 and the inorganic oxide is substantially placed between the fibers constituting said inorganic fiber cloth.The above inorganic fiber cloth is preferably a glass fiber cloth, more preferably a glass fiber cloth which surface is acid-treated to have a layer deficient in alumina and calcium oxide.

Abstract: Synthetic lubricant blends exhibiting superior lubricant properties such as high viscosity index, including mixtures of oligomeric products of shape selective catalysis with other lubricants, such as high viscosity index poly-alpha-(.alpha.-)olefins lubricant basestock, conventional poly(.alpha.-olefin) and/or other liquid lubricant basestock material.Preferred lubricant mixtures comprise hydrogenated components:a) a low viscosity C.sub.20 -C.sub.60 lubricant range liquid comprising substantially linear hydrocarbon moietoes prepared by shape selective catalysis of lower olefin with medium pore acid zeolite catalyst to provide substantially linear liquid olefinic intermediates or C.sub.20.sup.+ lubricants, said lubricant range liquid having a kinematic viscosity of about 2-10 cS at 100.degree. C.; andb) at least one poly(.alpha.-olefin) having viscosity greater than 20 cS and viscosity index improvement properties.

Abstract: A method for converting lower alkanes to a higher molecular weight hydrocarbon using a contact material of a fluorine-containing compound of at least one of Sr, Ba, Sc, Y or La, as well as such contact material compositions themselves is provided.

Abstract: In a process for preparing a catalyst for producing methacrylic acid represented by the formula,P.sub.a Mo.sub.b V.sub.c Cu.sub.d Bi.sub.e X.sub.f Y.sub.g O.sub.hwherein P, Mo, V, Cu, Bi and O are phosphorus, molybdenum, vanadium, copper, bismuth and oxygen, respectively, X is at least one element selected from the group consisting of potassium, rubidium, cesium and thallium, Y is at least one element selected from the group consisting of antimony, zinc, iron, cerium, magnesium, chromium, indium, tellurium, manganese, tin, germanium, arsenic, boron, silicon, selenium, zirconium, silver, tantalum and tungsten, a, b, c, d, e, f, g and h are an atomic ratio of each element, and when b is 12, a is 0.1 to 3, c is 0.01 to 2, d is 0.01 to 2, e is 0.05 to 1, f is 0.01 to 2 and g is 0.

Abstract: Improved processes for the production of secondary alkyl indanes, particularly mixtures of 1,1,3,5-tetramethyl-3-isopropylindanes and 1,3,3,5-tetramethyl-3-isopropylindane, and alkylated tetrahydronaphthalenes, particularly mixtures of 1,1,3,4,4,6-hexametyl-1,2,3,4-tetrahydronaphthalene and 1,1,2,4,4,6-hexamethyl-1,2,3,4-tetrahydronaphthalene, are described. In the processes of the invention, alkylated tetrahydronaphthalenes or secondary alkyl indanes are isomerized in the presence of a Lewis acid and a solvent which may be a halogenated or unhalogenated solvent and, optionally, a phase transfer agent, to produce, in the case of an alkylated tetrahydronaphthalene starting material, a secondary alkyl indane, and in the case of a secondary alkyl indane starting material, an aklylated tetrahydronaphthalene. The Lewis acid is present in the reaction medium in an amount of less than about 50 mole percent based on the amount of the alkylated tetrahydronaphthalene or secondary alkylindane charged.

Abstract: A process for dimerizing an alpha-olefin of the general formula RCH.dbd.CH.sub.2, where R is alkyl, cycloalkyl, or cycloalkenyl with a carbon number ranging from 1 to about 30, to a vinylidene olefin comprises contacting said alpha-olefin at temperatures between about -60.degree. C. to and 280.degree. C. with a catalyst comprising (a) a metallocene having the general formula (cyclopentadienyl).sub.n MY.sub.4-n wherein n=2 or 3, M is titanium, zirconium or hafnium and each Y is individually selected from hydrogen, C.sub.1 -C.sub.5 alkyl, C.sub.6 -C.sub.20 aryl, C.sub.2 -C.sub.20 alkoxy, C.sub.2 -C.sub.20 ester, and halogen, (b) an alkylaluminoxane other than methyl-aluminoxane, and (c) trimethyl aluminum.

Abstract: An aromatic alkylation process comprising continuously feeding catalyst particles through at least one substantially vertically-positioned permeable tube disposed in a vessel surrounding said permeable tube, contacting said catalyst particles with at least one aromatic hydrocarbon and at least one alkylating agent under liquid phase alkylation conditions, continuously removing said catalyst particles from a lower end of said tube, and recovering said alkyl-substituted aromatic.

Abstract: Catalyst supports, catalyst systems, methods for the preparation thereof, in dimerization processes therewith are provided. Catalyst supports are prepared from extruding alkali metal carbonate and a liquid. Optionally, the extruded catalyst support further comprises a carbonaceous compound. Catalyst systems comprise at least one elemental alkali metal deposited on the extruded catalyst support. Optionally, the catalyst system further comprises of at least one promoter. A hydrided catalyst system is prepared by contacting the catalyst system with hydrogen to reduce the dimerization induction period.

Abstract: A catalyst for purification of exhaust gas from a Diesel engine wherein a catalyst component containing (a) refractory inorganic oxide, (b) oxide of at least one element selected from the group consisting of praseodymium, neodymium and samarium, and (c) at least one noble metal selected from the group consisting of platinum, palladium and rhodium provided that palladium is never selected alone is borne on a refractory three-dimensional structure.

Abstract: An improved process of preparing a composition, which is effective as a CO oxidation catalyst and contains (a) a SnO.sub.2 -coated porous ceramic material, (b) Pt and/or Pd and (c) at least one compound of Mn and/or Cr, requires the preparation of component (a) by impregnation of a porous ceramic material (preferably a monolith) with a tin carboxylate solution, followed by drying and calcining (so as to decompose tin carboxyte to tin dioxide).

Abstract: A process is provided for the preparation of a catalyst which is particualrly active and selective in the oxidative conversion of methane into higher hydrocarbons and especially into C.sub.2.sup.+ hydrocarbons.In the process, an aqueous phase containing in solution cations of at least one metal of the lanthanide group and cations of at least one alkaline-earth metal, is brought into contact with a sufficient quantity of a source of carbonate ions or hydroxide ions to form a coprecipitate of carbonates and/or of hydroxycarbonates of the metals, the pH of the resulting reaction medium is brought to a value higher than 8, a coprecipitate is separated from the reaction medium, subjected to a washing operation, then to a drying operation and the washed and dried coprecipitate is subjected to calcination.

Abstract: Catalyst supports, catalyst systems, methods for the preparation thereof, in dimerization processes therewith are provided. Catalyst supports are prepared from potassium carbonate, sodium carbonate, an aluminum-containing compound, and water. Catalyst systems comprise of at least one elemental alkali metal deposited on the catalyst support. Optionally, the catalyst system further comprises of at least one promoter.

Abstract: A carrier for catalyst using refractory particles as cores and having a refractory inorganic powder and optionally whiskers, inorganic oxide sols, or mixtures thereof deposited on the cores, and a method for the production thereof.