Abstract: A supported catalyst for the polymerization and copolymerization of olefinically unsaturated compounds is described, comprising an organometallic compound of aluminium and a second component obtained by bringing a titanium, vanadium or chromium compound, at least one compound of a second metal chosen from V, Al, Zr, Hf, Mo and Nd and optionally a magnesium compound into contact with a porous support consisting of microbeads of aerogels of one or more inorganic oxides distinguished by low density, high porosity and the fact that at least 90% of the pores have a diameter lying within a very narrow range of values. The process for the polymerization or copolymerization of olefinically unsaturated compounds based on the use of said catalyst is also described.

Abstract: A process for selectively dehydrogenating organic compounds, and particularly for dehydrogenating dimethyltetralins to dimethylnaphthalenes, by contacting the organic compound at an elevated temperature with a catalyst prepared by treating a composition comprising an alumina support material and platinum group metal with an excess amount of an alkaline solution of an alkali metal salt.

Abstract: A process for the production of para-oriented dicarboxylic aromatic acids is disclosed in which an aromatic compound, having a tertiary alkyl group, is oxidized with molecular oxygen in the presence of a catalytic composition comprising a cobalt salt, a minor amount of a manganese salt, and a source of chloride in the presence of a solvent.

Abstract: A composition for gas purification, comprising a reaction product of at least one metal selected from the group consisting of iron, manganese, chromium, nickel, zinc, aluminum, copper, tin and cobalt, and alloys containing these metal elements, with at least one oxypolybasic acid, wherein the metal co-exists therein while in an unreacted state.

Abstract: A catalyst comprising a high-molecular complex formed from a palladium compound and a nitrile group-containing polymer, and a method for hydrogenating a conjugated diene polymer which comprises selectively hydrogenating only a carbon-carbon double bond of the conjugated diene polymer using same.

Abstract: A catalytic composite comprising a combination of catalytically effective amounts of a platinum component, optionally a second metal component such as tin or rhenium, and a halogen component with a porous carrier support material is disclosed. The platinum, second metal (if present) and halogen components are present in the catalytic composite in amounts, calculated on an elemental basis, of about 0.2 to about 0.4 wt. percent platinum metal, about 0.2 to about 0.5 wt. percent the second metal, and 0.5 to about 1.5 wt. percent halogen. Moreover, the metallic components are substantially uniformly distributed throughout the porous carrier support material. The support material is spherical gamma alumina having a characteristic pore structure including "superpores" (200-10,000 nm or greater) interconnected with "mesopores" (5-20 nm), wherein 80% or more of the pore volume (N.sub.2) resides in pores of less than 150 .ANG..

Abstract: An ethylene dimerization process catalyzed by a hetergeneous catalyst comprising a nickel compound, a phosphine compound, an organoaluminum compound, and a perfluorosulfonate polymer is provided. The dimerization process comprises contacting ethylene under dimerization conditions with the catalyst which is prepared by adding a homogeneous solution, formed by mixing under ethylene pressure the organoaluminum solution with a mixture of the nickel compound and the phosphine compound, to a suspension of the perfluorosulfonate polymer in an alcohol.

Abstract: A carbonylation catalyst system, which comprises:a) a source of a Group VIII metal;b) a source of a phosphine having an aromatic substituent containing an imino nitrogen atom;c) a source of protons; andd) a source of an alkylsulfonate anion, and the use of such a catalyst system in the carbonylation of an acetylenically or olefinically unsaturated compound.

Abstract: The present invention relates to a catalyst and a process for preparing a catalyst suitable for polymerization of olefins. The process is carried out in a hydrocarbon liquid medium and comprises successively contacting a refractory oxide support with (a) a dialkylmagnesium optionally with a trialkylaluminium, (b) a particular monochloro organic compound, (c) a titanium and/or vanadium compound(s), and then (d) with ethylene optionally mixed with a C.sub.3 -C.sub.8 alpha-olefin in the presence of an organo-aluminium or organozinc compound to form a prepolymerised catalyst. The catalyst has a high activity, particularly in a gas phase polymerization of ethylene, and has a great ability of copolymerizing alpha-olefins with ethylene.

Abstract: Highly active double metal cyanide complex catalysts suitable for use in ring-opening polymerization reactions may be prepared in filterable form by controlling the order of reagent addition, the temperature of the reaction medium, and the stoichiometric ratio of the reactants.

Abstract: Hydrocarbon solvent solutions of alkylaluminoxane are made by mixing trimethylaluminum and a hydrocarbylaluminum compound, which compound contains at least one hydrocarbyl group having 2 or more carbon atoms, in a hydrocarbon solvent and thereafter adding water or a hydrated compound so as to form a solution of alkylaluminoxane in said solvent.

Abstract: A multiple site solid catalyst component capable of producing polyolefins having a broad or multimodal molecular weight distribution, such as a bi-modal molecular weight distribution, is prepared by contacting a particulate solid support with a zirconium compound or complex to bind the zirconium compound or complex to the support, optionally followed by contacting the supported zirconium compound or complex with a Lewis acid to produce an intermediate product, optionally isolating and washing the supported zirconium compound or complex or resulting intermediate product to remove soluble by-products therefrom, and reacting the washed or unwashed supported zirconium compound or complex or intermediate product with a titanium or vanadium compound to produce a solid catalyst component.

Abstract: A polymerization catalyst is formed by combining a metal halide compound, a solvent, an effective amount of water to reduce fines and increase particle size, and a transition metal compound to form a first catalyst component and mixing the first catalyst component with a precipitating agent. After mixing the first catalyst component and the precipitating agent, the mixture can be heated to a temperature higher than the mixing temperature to reduce polymer fines. In the alternative prepolymer can be deposited on the catalyst(s) in an amount effective to reduce polymer fines. Optionally the catalyst can be treated with a halide ion exchanging source. The catalyst can also be combined with an organometallic cocatalyst.

Abstract: There is disclosed a catalyst for the liquid phase oxidation of functional groups comprising metalloporphyrins carrying anionic groups as substituents in which the metalloporphyrins are immobilized on a support which is made of a polymer containing nitrogenous groups used as a Lewis base and to a process of making the same.

Abstract: The invention relates to catalysts for ethylene polymerization or copolymerization to produce film quality product which exhibits improved FDA hexane extractables. The invention also relates to catalysts for ethylene polymerization or copolymerization to produce film quality product which exhibits improved dart impact resistance. The invention relates to catalysts for ethylene polymerization or copolymerization to produce film quality product which exhibits improved MD tear properties.

Abstract: This invention describes the preparation and use of metal oxide catalysts supported on titanium dioxide, hydrophobic or polymeric substrates for the removal of NO.sub.x and SO.sub.x from gas streams such as flue gases and combustion exhaust gases.

Abstract: A catalyst system comprising an aqueous solution of a derivative of palladium and of a water-soluble ligand associated with a nitrile, and its use, for example, for effecting allyl substitution reactions in a two-phase system with easy recycling of the catalyst after phase separation.

Abstract: Packing materials for use in liquid chromatographs are prepared by reacting silica gel or porous glass having silanol groups on the surface thereof with a chemical modifier to chemically attach the chemical modifier to silanol groups on the silica gel or porous glass, and reacting the chemically modified silica gel or porous glass with an end-capping agent in gas phase at 250.degree.-500.degree. C. to chemically attach the end-capping agent to the residual silanol groups on the silica gel or porous glass.

Abstract: The instant invention relates to concentrated water soluble organic salts of the lanthanides, particularly the cerium salts which are useful in the production of exhaust emission reduction catalysts. The preferred compositions comprise cerium acetate with gluconic acid and excess acetic acid.

Abstract: A process for preparing a solid catalyst component which comprises halogenating a magnesium compound in the formula MgRR.sup.1.nCO.sub.2 in which R and R.sup.1 are the same or different alkoxy or phenoxy groups and n is a number of from 0 to 2 with a halide of tetravalent titanium in the presence of dialkylester of a dihydric aromatic carboxylic acid and an inert hydrocarbon diluent by reacting at a temperature of from 120.degree. to 136.degree. C. and recovering the solid reaction product from the reaction mixture.