Abstract: An accelerator composition for the curing of unsaturated maleic, allylic, vinylic and epoxy-type polyester resins is disclosed. The accelerator composition includes a complex of a salt of a metal selected from lithium, copper, manganese, magnesium, vanadium, iron and cobalt, with an ammonium salt of a C.sub.2 -C.sub.20 carboxylic acid which is capable of forming a complex with the metal salt. Also disclosed are a curable resin composition including the foregoing accelerators and a curing process employing these accelerators.

Abstract: It is herein disclosed a novel catalyst systems comprising:a) a source of cations of Group VIII metals, selected from palladium, cobalt and nickel;b) a source of anions andc) a source of bidentate ligands of the formulaR.sup.1 R.sup.2 M.sup.1 --R--M.sup.2 R.sup.3 R.sup.4wherein each of M.sup.1 and M.sup.2 independently represents a phosphorus, arsenic, antimony or nitrogen atom, R represents a bivalent organic bridging group containing at least two atoms in the bridge and R.sup.1, R.sup.2, R.sup.3 and R.sup.4 independently represent substituted or non-substituted hydrocarbyl groups with the proviso that at least one of R.sup.1, R.sup.2, R.sup.3 and R.sup.4 represents an aryl group at least containing as substituents (i) at one or both ortho positions with respect to M.sup.1 or M.sup.2 to which the aryl group is linked, a hydrocarbyloxy group and (ii) at a meta position, adjacent to a substituted ortho position, a hydrocarbyl group or at the para position a halogen atom.

Abstract: This invention is directed to a method for making metal-aluminum-oxide materials according to sol-gel techniques from particularly defined heterobimetallic alkoxides comprising bis[bis(2-propanolato)aluminum)-tetrakis(.mu.-(2-propanolato)]alkaline-ear ths and, optionally, tris [(bis(2-propanolato)aluminum)hexakis(.mu.-(2-propanolato))]-lanthanides, and the materials so made. The materials may be in varied forms like sols, gels, xerogels, and calcined materials.

Abstract: A .pi.-allylnickel/counterion complex is reacted with a halogenated ketone to product a highly active polymerization initiator.

Abstract: A catalyst solution comprising one or more compounds of a metal catalyst and an organic solvent selected from the group consisting of a glycol derivative, an alkyl pyrrolidone, and an alkoxy ethyl ether, wherein no additional chloride-containing compounds are added to the solution. The metal can be selected from the group consisting of platinum, rhenium and rhodium. The compounds can be selected from the group consisting of H.sub.2 PtCl.sub.6.6H.sub.2 O, Re.sub.2 (CO).sub.10, Re.sub.2 O.sub.7, LiReO.sub.4 and RhCl.sub.3.4H.sub.2 O. The catalytic solutions are useful in conversion of pollutants from automotive engines and the like. In a particularly preferred embodiment, the solution contains three metals: platinum, rhenium, and rhodium.

Abstract: Highly microporous zirconia particulates having pore sizes of an average diameter of less than 20 .ANG. (2 nm), well adapted as catalysts and catalyst supports, are prepared by thermohydrolyzing a zirconium salt, separating the resulting precipitate from the medium of thermohydrolysis and then calcining such precipitate, and wherein an anion more covalent than the hydroxyl anion, e.g., a nitrate, sulfate, phosphate or carboxylate, is incorporated into such precipitate upstream of the calcination thereof.

Abstract: Novel catalyst compositions, useful in the production of linear alternating polymers of carbon monoxide and at least one ethylenically unsaturated hydrocarbon, comprise a compound of palladium, a Lewis acid of the formula MF.sub.n wherein n is 3 or 5 and M is a Group III or V element which forms a binary fluoride, and a bidentate ligand of phosphorus, nitrogen or sulfur.

Abstract: Linear alternating polymer of carbon monoxide and at least one ethylenically unsaturated hydrocarbon of relatively high bulk density is produced by contacting the carbon monoxide and hydrocarbon under polymerization conditions in the presence of a reaction diluent and a catalyst composition formed from a compound of palladium, at least 5 mols per mol of palladium of strong, non-hydrohalogenic acid and a bidentate ligand of phosphorus wherein each monovalent phosphorus substituent is characterized by a carbon atom having no more than one hydrogen substituent, which carbon atom is connected to the phosphorus by a methylene group.

Abstract: Initiator compositions for materials which can be polymerized cationically are described, these containingi) an anhydride of a polycarboxylic acid, a polyisocyanate, a cyclic carbonate, a lactone or a mixture of such compounds, and dissolved thereinii) at least one compound of the formula I[M.sup.+n (L).sub.x ].sup.n+ n X.sup.- (I)in which n is 2 or 3, M is a metal cation selected from the group consisting of Zn.sup.2+, Mg.sup.2+, Fe.sup.2+, Co.sup.2+, Ni.sup.2+, Cr.sup.2+, Ru.sup.2+, Mn.sup.2+, Sn.sup.2+, VO.sup.2+, Fe.sup.3+, Al.sup.3+ and Co.sup.3+, X.sup.- is an anion which is selected from the group consisting of AsF.sub.6.sup.-, SbF.sub.6.sup.-, BiF.sub.6.sup.- and derivatives derived from these anions in which a fluorine atom is replaced by hydroxyl groups, or in which up to 50% of the anions X.sup.-, based on the total amount of anions, can also be any desired anions, L is water or an organic .sigma.

Abstract: Bleach catalyst composition in the form of non-friable composite granules. Each granule is free from easily oxidisable organic materials and comprises a manganese complex catalyst; optionally an inert salt and a binding agent. Detergent compositions comprising such granules have good peroxide and enzyme stability.

Abstract: An improved process for the production of linear alternating polymers of carbon monoxide and at least one ethylenically unsaturated hydrocarbon employs a novel catalyst composition formed from a compound of palladium, the anion of a strong non-hydrohalogenic acid and a bidentate ligand of phosphorus wherein the divalent group bridging the two phosphorus atoms is 2-hydroxy-2-alkyl-1,3-propylene.

Abstract: In a process for preparing a dehydrogenation catalyst of the type in which a support comprising zinc aluminate is impregnated with at least one of platinum and tin from an impregnation solution, the improvement comprises simultaneously impregnating the support with the platinum and the tin by contacting the support with an impregnation solution which comprises, in solution, a tin compound, a platinum compound, and a carboxylic acid. The thus prepared catalyst can be employed in the dehydrogenation of at least one alkane containing 2-8 carbon atoms per molecule in the presence of steam.

Abstract: An improved process for the production of linear alternating polymers of carbon monoxide and at least one ethylenically unsaturated hydrocarbon comprises contacting the carbon monoxide and hydrocarbon under polymerization conditions in the presence of a liquid reaction diluent and a supported catalyst composition formed from a compound of palladium, the anion of a strong non-hydrohalogenic acid and a bidentate ligand chemically bound to support particles having an average particle diameter of at least 500 .mu..

Abstract: The present invention relates to the preparation of catalysts for heteroatom removal, particularly sulfur, from petroleum and synthetic fuel feedstocks. The catalyst is comprised of at least one Group VIII metal, and at least one Group VI metal, on a refractory support. The catalyst is prepared by: impregnating an inorganic oxide support material with a Group VI heteropolyacid; treating said impregnated support with an aqueous solution of a reducing agent which is capable of at least partially reducing the Group VI metal of the heteropolyacid; drying said treated support at a temperature from about 20.degree. C. to about 200.degree. C. at about atmospheric pressure; impregnating the treated support with a Group VIII metal salt of an acid having an acidity less than that of the Group VI heteropolyacid; drying said impregnated treated support at a temperature from about 20.degree. C. to about 200.degree. C. at about atmospheric pressure; and sulfiding said impregnated support, thereby forming the catalysts.

Abstract: The present invention provides a catalyst for asymmetric synthesis prepared from a dialkali metal salt of an optically active 2,2'-dihydroxy-1,1'-binaphthyl represented by the formula (I.sub.R) ##STR1## or the formula (I.sub.S) ##STR2## (wherein M is Li, K or Na), a lanthanum compound represented by LaX.sub.3 (X is F, Cl, Br, I, NO.sub.3 or CH.sub.3 CO.sub.2) and an alkali metal alkoxide or an alkali metal hydroxide represented by MOR or MOH (M is Li, K or Na, and R is isopropyl or t-butyl), respectively, in the presence of a water-containing solvent. The catalyst of the present invention is extremely valuable as a catalyst for asymmetric synthesis of an asymmetric nitroaldol reaction useful in the synthesis of a .beta.-hydroxynitro compound which is an important synthetic raw material for an optically active compound such as a medicine.

Abstract: A method for the preparation of catalysts for heteroatom removal, particularly sulfur, from petroleum and synthetic fuel feedstocks. The catalyst is comprised of at least one Group VIII metal, and at least one Group VI metal, on a refractory support. The present method for preparing said catalysts comprises impregnating the Group VIII metal onto the refractory support by use of a Group VIII metal salt of an acid, and impregnating the Group VI metal onto the support by way of a Group VI heteropolyacid, wherein the acid comprising the salt of the Group VIII metal is less acidic than the heteropolyacid. The catalysts are then subjected to a heat treatment which includes a first phase wherein the catalyst is dried of free water and a second phase wherein the catalyst is heated to a temperature up to about 300.degree. C. at a heating rate from about 0.15.degree. C./min to about 15.degree. C./min.

Abstract: A novel catalyst composition containing a palladium salt, an anion of a non-hydrohalogenic acid with a pk.sub.a of less than 2, a phosphorus bidentate ligand and an acid with a pk.sub.a of at least 4 but less than 6. The catalyst composition effectively polymerizes carbon monoxide and at least one ethylenically unsaturated hydrocarbon to produce linear, alternating polymers.

Abstract: A catalyst and a process for using the catalyst have been developed. The catalyst is a metal chelate dispersed on a basic support which is a combination of a solid base and a secondary component. The solid base can be a solid solution of metal oxides and/or a layered double hydroxide (LDH) and the secondary component can be calcium oxide, magnesium oxide, calcium hydroxide and magnesium hydroxide. The process involves contacting a sour hydrocarbon fraction which contains mercaptans with the catalyst in the presence of an oxidizing agent and a polar compound. Examples of these polar compounds are water and alcohols, with methanol being especially preferred. The process is unique in that the solid solution or LDH are solid bases which eliminates the need for a liquid base. Optionally, an onium compound may be used as a catalyst promoter.

Abstract: An improved process for the production of linear alternating polymers of carbon monoxide and at least one ethylenically unsaturated hydrocarbon, preferably propylene, includes an aromatic amine in the catalyst composition formed from a palladium salt, the anion of a strong non-hydrohalogenic acid and a bidentate ligand of phosphorus. The presence of the aromatic amine reduces the proportion of 3-alkyl-2,5-furandiyl moieties present in the polymer chain.

Abstract: This invention provides an isoparaffin-olefin alkylation catalyst composition comprising hydrofluoric acid, an additive, and a superacid promoter. The additive is present in concentration sufficient to effect deactivation of the hydrofluoric acid for isoparaffin-olefin alkylation such that the catalytic properties of said admixture of the hydrofluoric acid and the additive, in the absence of superacid promoter are characterized by the conversion of a mixed isoparaffin-olefin stream to product containing more than about 0.1 weight percent of alkyl halide.

Abstract: An improved process for the production of linear alternating polymers of carbon monoxide and at least one ethylenically unsaturated hydrocarbon comprises contacting the carbon monoxide and hydrocarbon under polymerization conditions in the presence of a reaction diluent and a novel catalyst composition formed from a compound of palladium, the anion of a strong non-hydrohalogenic acid and a bis(diethylphosphino)alkane.

Abstract: Oxidation of alkylaromatics having a benzylic hydrogen atom is catalyzed by a catalyst comprising a palladium salt, a metal persulfate, a third metal salt, and a tin salt in a carboxylic acid for a period of time sufficient to convert the alkylaromatics to their corresponding oxidized derivatives. The catalyst is prepared by preheating the palladium salt and the metal persulfate at a temperature sufficient to provide the desired catalytic activity followed by addition of the third metal salt and the tin salt.

Abstract: 1. A catalyst system comprising1) an alkali metal or tetralkylammonium carboxylate having the formula ##STR1## and 2) a strontium, barium or zinc carboxylate having the formula ##STR2## wherein M represents an alkali metal or tetralkylammonium, Q represents strontium, barium or zinc and R.sub.1, R.sub.2 and R.sub.3 are the same or different and represent H or lower alkyl, cycloalkyl, phenyl or alkylphenyl and wherein the molar ratio of the alkali metal or tetralkylammonium carboxylate to the strontium, barium or zinc carboxylate is 1:1.1-10. The catalyst system is in particular useful for preparing molded objects according to the SRIM process.

Abstract: Olefins are polymerized with a catalyst system composition comprising a nickel compound and an aromatic carboxylic acid wherein there is an atom linkage between the aromatic moiety and the carboxylic acid functional group. The novel catalyst system composition can be heterogeneous or homogeneous. This composition allows the production of one or more olefin polymers which have a very high molecular weight.

Abstract: A catalyst composition useful in the preparation of a polymer composition includes a Group VIII metal and a phosphorus bidentate ligand of the general formula (R.sub.2)(R.sub.4)P--R.sub.3 --P(R.sub.2)(R.sub.4) wherein R.sub.2 and R.sub.4 are optionally polar substituted alkyl groups, differing from each other in carbon number, and wherein R.sub.3 is a divalent organic bridging group which contains four atoms. Such catalyst compositions are particularly useful for preparing copolymers of carbon monoxide with .alpha.-olefins having at least three carbon atoms.

Abstract: The invention provides a process for producing a polyphenylene ether by subjecting a 2,6-disubstituted phenol to oxidative coupling by introducing oxygen in the presence of a catalyst system which comprises a manganese compound, a chelant, a base, and an alpha,beta-unsaturated ketone, a beta-diketone, or a vinyl ether. The polyphenylene oxide produced has substantially no amine odor and more stable molecular weight, and is suitable for blending with styrenic or other resins to make thermoplastic resin blends of low odor and good physical properties.

Abstract: An accelerator composition for the curing of unsaturated maleic, allylic, vinylic and epoxy-type polyester resins is disclosed. The accelerator composition includes a complex of a salt of a metal selected from lithium, copper, manganese, magnesium, vanadium, iron and cobalt, with an oxygen-containing compound which is capable of forming a complex with the metal salt and includes at least one functional group selected from aldehyde, ketone, ether, ester and alcohol. Also disclosed are a curable resin composition including the foregoing accelerators and a curing process employing these accelerators.

Abstract: Disclosed is a method of preparing a catalyst for hydrogenation of a hydrocarbon oil, in which a hydroxycarboxylic acid is added to a catalyst carrying a metal of the Group VI of the Periodic Table and a metal of the Group VIII of the same, optionally along with phosphoric acid, on a carrier, in an amount of from 0.3 to 5 molar times of the total metal molar number of the metal of the Group VI and the metal of Group VIII, and thereafter the resulting catalyst is dried at a temperature not higher than 200.degree. C. The catalyst has a high catalyst activity and is used for hydrogenation of a hydrocarbon oil, especially satisfying the requirement of reducing the sulfur content in a light oil.

Abstract: A catalyst has been developed. The catalyst is a metal chelate dispersed on a basic support which is either a solid solution of metal oxides or a layered double hydroxide (LDH). The process involves contacting a sour hydrocarbon fraction which contains mercaptans with the catalyst in the presence of an oxidizing agent and a polar compound. Examples of these polar compounds are water and alcohols, with methanol being especially preferred. The process is unique in that the solid solution or LDH are solid bases which eliminates the need for a liquid base. Optionally, an onium compound may be used as a catalyst promoter.

Abstract: An improved catalyst composition for the production of linear alternating polymers of carbon monoxide and at least one ethylenically unsaturated hydrocarbon is formed from a compound of palladium, the anion of a strong non-hydrohalogenic acid and a bidentate ligand of phosphorus wherein each monovalent phosphorus substituent is phenyl substituted by at least one alkoxy group on a ring carbon atom ortho to the atom through which the group is connected to a phosphorus atom, and the divalent alkylene bridging group between the phosphorus atoms has a single substituent (other than hydrogen) having atoms of carbon, hydrogen and optionally oxygen.

Abstract: The invention relates to a method for making a catalyst which contains palladium and/or its compounds and, if desired, additionally gold and/or gold compounds and which contains as activators alkali metal compounds and, if desired, additionally cadmium compounds on a support which is composed of SiO.sub.2 or an SiO.sub.2 -Al.sub.2 O.sub.3 mixture having a surface area of 50-250 m.sup.2 /g and a pore volume of 0.4-1.2 ml/g and whose particles have a particle size of 4 to 9 mm, 5 to 20% of the pore volume of the support being formed of pores having radii of 200 to 3000 .ANG. and 50 to 90% of the pore volume being formed of pores having radii of 70 to 100 .ANG.. The support particles are compressed with the aid of an Li, Mg, Al, Zn or Mn salt of a C.sub.2 -C.sub.20 carboxylic acid or a mixture of such salts as binder.

Abstract: An improved process for the production of linear alternating polymers of carbon monoxide and at least one ethylenically unsaturated hydrocarbon of at least 3 carbon atoms employs a novel catalyst composition formed from a palladium compound, the anion of a strong non-hydrohalogenic acid, an aliphatic bidentate ligand of phosphorus and a polyalkoxyalkane.

Abstract: The present invention relates to a novel route for the synthesis of methanol, and more specifically to the production of methanol by contacting synthesis gas under relatively mild conditions in a slurry phase with a catalyst combination comprising reduced copper chromite and basic alkali salts or alkaline earth salts. The present invention allows the synthesis of methanol to occur in the temperature range of approximately 100.degree.-160.degree. C. and the pressure range of 40-65 atm. The process produces methanol with up to 90% syngas conversion per pass and up to 95% methanol selectivity. The only major by-product is a small amount of easily separated methyl formate. Very small amounts of water, carbon dioxide and dimethyl ether are also produced. The present catalyst combination also is capable of tolerating fluctuations in the H.sub.2 /CO ratio without major deleterious effect on the reaction rate. Furthermore, carbon dioxide and water are also tolerated without substantial catalyst deactivation.

Abstract: An improved process for the production of linear alternating polymers of carbon monoxide and at least one ethylenically unsaturated hydrocarbon employs a novel catalyst composition formed from a compound of palladium, the anion of a strong non-hydrohalogenic acid and a novel hexakis phosphine ligand. The process is characterized by a lessened degree of reactor fouling.

Abstract: A tin catalyst constituting an organotin compound modified with an amine is used to catalyze the hydrolysis of latent amine curing agents in amine-curable polymeric compositions. The tin catalyst is formed from the reaction product of a stannous alkanoate and an amine, optionally in the form of an adduct with water. A preferred catalyst is the reaction product of stannous octoate and ethylenediamine.

Abstract: The invention provides an acid catalyst composition for alkylation of an isoparaffin with an olefin comprising from about 10 to about 90 percent of at least one acid selected from the group consisting of hydrofluoric acid and the halogen-substituted sulfonic acids, together with from about 10 to about 90 weight percent of a mono-, di-, or tri-carboxylic acid substituted member selected from the group consisting of alkanes, aromatics, haloalkanes, and haloaromatics having from about 1 to about 30 carbon atoms.

Abstract: An air filter is treated with a reactive functional organosilixane composition so as to increase the oxygen concentration in air drawn through a carburetor system of an internal combustion engine and is also directed to the method of treating a standard air filter of cellulosic material by intermixing an organosiloxane and metal salt catalyst with a volatile solvent, applying the solution in liquid form to the filter and draining and drying the filter until the solvent is evaporated on the surface of the filter.

Abstract: A method of preparing a catalyst for hydrogenation of a hydrocarbon oil, wherein an aqueous solution containing a metal of Group VI of the Periodic Table and a metal of Group VIII of the same, along with a hydroxycarboxylic acid and optionally phosphoric acid is added to a carrier substance consisting essentially of at least one of an inorganic oxide and an inorganic hydrate, and the resulting blend is kneaded, shaped and thereafter dried at a temperature not higher than 200.degree. C. The catalyst has a high catalyst activity and is used for hydrogenation of a hydrocarbon oil, especially satisfying the requirement of reducing the sulfur content in a light oil.

Abstract: This invention provides a process for producing improved catalysts for the production of alkenyl alkanoates by the reaction of an alkene, an alkanoic acid and an oxygen-containing gas. The catalysts contain palladium, gold and a potassium promoter and are characterized by a reduced sodium content which results in increased catalyst activity. The reduced sodium content is obtained by washing the catalyst with water or with an aqueous solution of a potassium promoter after it has been impregnated with a potassium promoter.

Abstract: A shell impregnated catalyst for use in the production of vinyl acetate from ethylene, acetic acid and an oxygen containing gas is provided. The catalyst has a productivity of greater than 661 grams of vinyl acetate per hour per liter of catalyst at 150.degree. C. and consists essentially of:(1) a catalyst support having a particle diameter from about 3 to about 7 mm and a pore volume of 0.2 to 1.5 ml per gram(2) palladium and gold distributed in the outermost 1.0 mm thick layer of the catalyst support particles, and(3) from about 3.5 to 9.5% by weight of potassium acetate.The catalyst is characterized by having a gold to palladium weight ratio in the range 0.60 to 1.25.

Abstract: This invention provides a process for producing improved catalysts for the production of alkenyl alkanoates by the reaction of an alkene, an alkanoic acid and an oxygen-containing gas. The catalysts contain palladium, gold and a potassium promoter and are characterized by a reduced sodium content which results in increased catalyst activity. The reduced sodium content is obtained by washing the catalyst, at a particular intermediate point in its production, with a cation exchange solution.

Abstract: This invention provides a process for producing improved catalysts for the production of alkenyl alkanoates by the reaction of an alkene, an alkanoic acid and an oxygen-containing gas. The catalysts contain palladium, gold and a potassium promoter and are characterized by a reduced sodium content which results in increased catalyst activity. The reduced sodium content is obtained by using essentially sodium-free starting materials in the process for producing the catalysts.

Abstract: A novel catalyst composition containing a Group VIII metal and a phosphorus bidentate ligand wherein each phosphorus atom forms part of a phosphacyclohexyl structure.

Abstract: A series of new crystalline titanates (CT) are shown to have considerable potential as catalyst supports. For Pd supported catalyst, the catalytic activity for pyrene hydrogenation was substantially different depending on the type of CT, and one was substantially more active than Pd on hydrous titanium oxide (HTO). For 1-hexene hydrogenation the activities of the new CTs were approximately the same as for the hydrous metal oxide supports.

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 composition having superior hydrotreating activity which catalyst is comprised of salts and/or complexes of Group VIII metals with Group VI metal heteropolyacids on an inorganic oxide support material, wherein the concentration of Group VIII metal ranges from about 2 to 20 wt. %, and the concentration of Group VI metal ranges from 5 to 50 wt. %, which percents are on support and which catalyst composition is substantially free of free water.

Abstract: Disclosed is a method of preparing a high-activity hydrotreating catalyst for hydrocarbon oil, where metals of Group VI (Mo and/or W) and Group VIII (Co and/or Ni) optionally along with phosphorus, and 0.3 to 3.5 molar times of the total molar amount of the metals of particular carboxylic acid(s) (tartaric acid, citric acid, etc.) and 0.1 times or more of the amount necessary for forming the active metals into their sulfides of particular organic sulfur compound(s) (mercapto-acetic acid, mercapto-succinic acid, etc.) are added to a material consisting essentially of at least one of inorganic acids and their hydrates, and they are kneaded shaped and dried at 200.degree. C. or lower. Using the catalyst, hydrotreatment, desulfurization and denitrogenation of hydrocarbon oil may be effected under mild conditions at a reduced operation cost.

Abstract: An immobilized metal complex is disclosed, which is immobilized on an inorganic carrier to which a long molecular chain compound capable of surrounding the metal complex is bound in an amount of at least 1.5 mols per mol of the metal complex. This novel immobilized metal complex has an excellent stability and can be used as a metal complex catalyst providing excellent reactivity.

Abstract: Disclosed is a process for controlling the degree of dispersion of a catalyst active component in the preparation of a metal/carrier solid catalyst, which comprises dry-blending an ultra-fine single crystal carrier material and an active component metal material, molding the blend, heating and maintaining the molded body in an inert gas at a temperature higher than and close to the melting point of the active component metal material, and heat-treating the molded body in the same atmosphere gas at a temperature higher than the decomposition temperature of the active component metal material.

Abstract: An improved process for the production of linear alternating polymers of carbon monoxide and at least one ethylenically unsaturated hydrocarbon comprises contacting the carbon monoxide and hydrocarbon under polymerization conditions in the presence of a catalyst composition formed from a palladium compound, an anion of a strong non-hydrohalogenic acid and an aryl phosphine sulfide having at least 2 phosphorus atoms.