Abstract: A high temperature combustion catalyst for use in a catalytic combustion type gas turbine combustor and the like, having a superior low temperature ignitionability and a superior thermal durability at a high temperature, which comprises a porous carrier layer, a catalyst component such as palladium and platinum, and first, second and third promoter components, the latter four components being carried on the porous carrier layer, in which the first promoter component includes one of rare earth elements such as lanthanum, cerium, praseodymium and neodymium, alkaline earth metals such as barium, strontium and calcium, and oxides thereof, in which the second promoter component includes magnesium, silicon and oxides thereof, and in which the third promotor component includes one of heavy metals such as nickel, zirconium, cobalt, iron and manganese, and oxides thereof. A method for producing this high temperature combustion catalyst is also disclosed.

Abstract: A catalyst composition which contains at least one metal from Group 2b and at least one metal from Group 6b of the Periodic Table of the Elements or compounds thereof and a crystalline aluminum silicate which is obtained by crystallizing an aqueous alkaline starting mixture comprising at least one silicon compound, at least one aluminum compound, at least one compound of a metal from Group 1a of the Periodic Table of the Elements (MX) and organic nitrogen compounds at an elevated temperature until said crystalline aluminum silicate is formed and subsequently separating crystalline aluminum silicate from the mother liquor, in which starting mixture the compounds are present in the following molar ratios:RN: R.sub.4 NY=1-1000,SiO.sub.2 : R.sub.4 NY=10-5000,SiO.sub.2 : Al.sub.2 O.sub.3 =50-300,SiO.sub.2 : MX<15, andH.sub.2 O: SiO.sub.2 =5-100,where RN represents a pyridine and R.sub.4 NY represents an organic quaternary ammonium compound.

Abstract: Catalytic compositions which comprise alumina bound spinel and/or spinel-mullite mixtures having an alkali metal content of below about 0.50 weight percent, preferably below about 0.10. The compositions are obtained by calcining a caustic leaching preformed particulate composites of clay and alumina sol, preferably chlorhydrol. The catalysts are particularly useful for the catalytic cracking of heavy hydrocarbon feedstocks to obtain gasoline and light cycle oil. When used for cracking feedstocks high in vanadium content these compositions may contain added alkaline earth oxide in order to passivate the vanadium.

Abstract: Catalytic vapor phase intramolecular dehydration reaction of an alkanolamine represented by the general formula ##STR1## wherein each of R and R' is selected from hydrogen, a methyl group and an ethyl group, and n is an integer of 2 to 5, to convert it into a cyclic amine represented by the general formula ##STR2## wherein R, R' and n are as defined above. The catalyst is an oxide composition represented by the following formulaSi.sub.a X.sub.x Y.sub.y O.sub.bwherein Si is silicon, X is at least one element selected from alkali metals and alkaline earth metals, Y is at least one element selected from B, Al, Ti, Zr, Sn, Zn and Ce, and O is oxygen; and the suffixes a, x, y and b represent the atomic ratios of the elements Si, X, Y and O respectively, and when a=1, x=0.0005-1 and y=0-1, and b is a value determined by a, x and y.

Abstract: A catalyst is disclosed which comprises a molybdenum-tungsten-containing complex represented by the formulaMo.sub.a W.sub.b M.sub.c A.sub.d O.sub.

Abstract: Metal vapor may be deposited on catalyst supports to produce a first supported metal. The first supported metal may be converted into a supported metal catalyst by contacting the first supported metal with a solution of ions of a catalytic metal, which will electrodeposit on the support. This process is an alternative to the impregnation method preparing catalysts.

Abstract: Catalysts of reduced cost, for purifying exhaust gases, having smaller thermal expansion coefficients than conventional catalysts, good mechanical strength and large specific surface area are provided at low temperatures. The composition composed of at least re-hydrable alumina, an alkali or alkaline earth metal titanate and fused silica is thermally processed at comparatively low temperatures so as to provide ceramic catalyst carriers which have superior properties.

Abstract: Durable, aging-resistant alumina-based catalyst carriers having improved mechanical strength are facilely prepared by (i) impregnating an alumina-based catalyst carrier with an aqueous solution of a quaternary ammonium silicate, (ii) drying said impregnated carrier, and (iii) calcining said dried carrier.

Abstract: Disclosed is a method for preparing dual colloid catalyst compositions which are suitable for use in such processes as ammonia synthesis, carbon monoxide hydrogenation, hydrogenation and denitrogenation. The method comprises forming a gel, or suspension, by admixing: (i) one or more transition metal cyano-containing anionic-complex solutions wherein at least one solution contains a reducible transition metal, and wherein one or more of these solutions optionally contains a nonreducible metal, with (ii) one or more solutions containing polyvalent metal cations. The resulting gel, or suspension is heated to a temperature of about 90.degree. C. to about 150.degree. C. for an effective amount of time to allow hydrolysis and polymerization to occur. The resulting solid is then filtered and ion exchanged with ions of one or more metals selected from those exchangeable metals from groups IA, IIA, IIIB, IVB, VIB, VIIB, and VIII of the Periodic Table of the Elements. The resulting ion-exchanged material is then dried.

Abstract: A crystalline swellable sheet silicate of the saponite type, of the formula[Mg.sub.6 (Si.sub.8-x Al.sub.x)O.sub.20 (OH).sub.4 ].sup.x-.(x/z)M.sup.z+ n H.sub.2 Oin whichx is a number which is less than 1.5 but at least 0.2,z is an integer from 1 to 3,M denotes a cation having the valency of z andn is a number less than 20, is prepared. For this purpose, an aqueous solution or suspension containing magnesium ions, a silica source, an alumina source and a sodium oxide source are combined. The atomic ratio of Mg/Si and Mg/Al used in this procedure correspond to the composition of the desired saponite. The atomic ration (Na-Al):(Mg+Si+3/2.Al) should be between x/5 and 1, Na denoting the amount of sodium atoms present in alkaline compounds. The pH of the reaction mixture should be at least 9.0. The crystals of the resulting synthetic saponite in the sodium form are separated off from the mother liquor and, if appropriate, treated with an aqueous solution or suspension of a salt having the cation M.sup.

Abstract: A catalyst for the production of synthesis gas or hydrogen from aqueous methanol by dissociation or steam reforming. The catalyst contains:(A) a noble metal component of one or more elements of the Group VIII of the Periodic Table on an oxide carrier which comprises(B.sub.1) TiO.sub.2 and/or CeO.sub.2, singly or in admixture with other thermo-resistant metal oxides and/or binders or(B.sub.2) TiO.sub.2 and/or CeO.sub.2 on the surface of a preformed, thermo-resistant carrier and(B.sub.3) ZrO.sub.2 or La.sub.2 O.sub.3 in weight concentrations of about 1 to 20% by weight.The concentration of hydrogen or of carbon monoxide may be controlled by monitoring the concentration of steam utilized in the inlet feed.

Abstract: Disclosed herein are catalyst compositions comprised of:(a) from about 15 to about 85 wt. % of crystallites selected from the group consisting of (i) crystallites of one or more transition metals and (ii) crystallites of reducible transition metal carbides and nitrides, and mixtures thereof, said transition metal being selected from those reducible metals from Groups IB, IIB, VIB, VIIB, and VIII of the Periodic Table of the Elements, wherein at least 80% of the crystallities have a diameter, d, between about 25 .ANG. and 500 .ANG. with the proviso that the crystallite size distribution of at least about 80% of these be expressed by the relationship 0.5D<d<2D where D is the median of the diameters of this 80%.(b) from about 15 to about 85 wt.

Abstract: Amorphous, substantially spherical silica particles obtained by acidic hydrolysis of substantially spherical synthetic crystalline calcium silicates having a size of from 20 to 120 microns are coated with a layer comprising silica and alumina. The silica particles obtained may be directly employed as catalysts for the oligomerization of olefins and, having been loaded with platinum, as hydrocracking catalysts.

Abstract: Hydrocarbons containing vanadium are converted to lower boiling fractions employing a zeolitic cracking catalyst containing a significant concentration of a calcium-containing additive e.g. calcium corbonate dolomite and amorphous as a vanadium passivating calcium silicate agent.

Abstract: Amorphous, approximately spherical silica particles prepared by the acidic hydrolysis of an approximately spherical synthetic calcium silicate having a uniform microgranular structure on their external surfaces and a structure in the interior thereof which structure only weakly recall the original crystal needle structure of the starting material. The average external particle size is from 15 to 80 .mu.m, the apparent particle volume is from 1.3 to 3 cm.sup.3 /g, and the specific surface area is from 250 to 800 m.sup.2 /g. The silica particles are particularly suitable for use as catalyst supports.

Abstract: Silica-based chromatographic and reactive materials are disclosed with surfaces modified to contain or to be coated with oxides, hydrous oxides, hydroxides, carbonates or silicates of aluminum, iron, or other suitable metals such as zirconium or titanium. The materials exhibit good resistance to dissolution and resulting loss of activity or clogging. This good resistance is particularly evident even in the high pH region (above 8-9) and in the high temperature region (above 35.degree. C.) where the dissolution rates and solubilities of aluminosilicates and of trivalent iron oxides are much smaller than those of silica.

Abstract: An improved oxidation catalyst, well adopted for the conversion of H.sub.2 S-containing acid gases at least in part to elemental sulfur, is facilely prepared by (i) hydrothermally treating at least a portion of an active alumina support, and (ii) then impregnating said at least partially hydrothermally treated support with a catalytically effective amount of a catalytically active oxide phase which comprises the oxides of at least one of the metals, Fe, Cu, Ag, W, Co, Ni, Bi, Cr and Cd, with the proviso (iii) that at least one rare earth oxide, alkaline earth metal oxide, zirconium oxide or silica compound, or any precursor compound thereof, is incorporated into the catalyst during either of the steps (i) or (ii).

Abstract: An improved olefin disproportionation catalyst produced by contacting an inorganic refractory oxide containing a catalytic amount of molybdenum oxide with a promoting amount of elemental metals of the group consisting of tin and magnesium.

Abstract: A catalyst for the production of synthesis gas or hydrogen from aqueous methanol by dissociation or steam reforming. The catalyst contains:(A) a metal component of one or more elements of the VIIIb group of the periodic table on a carrier material on the basis:(B.sub.1) of TiO.sub.2 or CeO.sub.2, singly or in admixture with other heat-resistant metal oxides and/or binders or(B.sub.2) of TiO.sub.2, which is introduced onto the surface of a preformed, heat-resistant carrier.Processes utilizing this catalyst allow for the dissociation of methanol for production of synthesis gas, or for the production of hydrogen through steam reforming.Thus, the concentration of hydrogen or of carbon monoxide may be controlled by monitoring the concentration of steam utilized in the inlet feed.

Abstract: Single phase, unsupported, Group IA or IIA metal salt promoted manganese-containing iron spinel catalysts, having Fe:Mn atomic ratios of 2:1 and above, have been found to be highly active for the selective conversion of CO/H.sub.2 to alpha olefins.

Abstract: Disclosed is a method for preparing dual colloid catalyst compositions wherein a gel, or colloidal suspension is formed by admixing (a) a 0.6 to 10M aqueous solution containing one or more soluble salts or complexes of one or more transition metals, wherein at least one of the transition metals is reducible and hydrolyzable, and one or more elements selected from Cr, Al, Si, Th, U, the lanthanides, and elements from Groups IA and IIA of the Periodic Table of the Elements, with (b) a 0.5 to 10N aqueous base solution. The solid material is separated from the resulting gel, or colloidal suspension and washed and dried.

Abstract: Disclosed is a method for preparing dual colloid catalyst compositions which are suitable for use in such processes as ammonia synthesis, carbon monoxide hydrogenation, hydrogenation and denitrogenation. The method comprises forming a gel, or suspension, by admixing: (i) one or more transition metal cyano-containing anionic-complex solutions wherein at least one solution contains a reducible transition metal, and wherein one or more of these solutions optionally contains a nonreducible metal, with (ii) one or more solutions containing polyovalent metal cations. The resulting gel, or suspension is heated at a temperature of about 90.degree. C. to about 150.degree. C. for an effective amount of time to allow hydrolysis and polymerization to occur. The resulting solid is then separated and dried.

Abstract: A pollution control catalyst for a catalytic converter in the exhaust system of an internal combustion engine, which catalyst comprises a support impregnated with (i) at least one platinum group precious metal, and with (ii) cerium base metal, or a combination of cerium and at least one other base metal, is facilely prepared by (1) impregnating a catalyst support with precursor compounds of said cerium base metal, or of said cerium base metal and of at least one other base metal, (2) activating said impregnated support, under a neutral or oxidizing atmosphere, at a temperature ranging from 120.degree. to 800.degree. C.

Abstract: An improved olefin disproportionation catalyst produced by contacting an inorganic refractory oxide containing a catalytic amount of molybdenum oxide with a promoting amount of at least one elemental metal selected from the group consisting of barium and magnesium.

Abstract: The disproportionation/skeletal isomerization of olefins can be carried out with high conversions and selectivity in the presence of catalyst compositions containing Group IIA and at least one of Group VIB and rhenium components.

Abstract: Process for the hydroisomerization of petroleum waxes by contacting said waxes with hydrogen at hydroisomerization conditions using a catalyst comprising at least one hydrogenating metal or compound thereof present on at least one refractory oxide which has been treated with from 0.1 to 30% w, calculated on refractory oxide, of at least one reactive metal compound of Group 2a, 3a, 4a and/or 4b of the Periodic Table of the Elements.

Abstract: A catalyst composition for use in the production of hydrocarbons from synthesis gas comprises the essential metals(a) at least one of iron, cobalt, nickel and ruthenium, and(b) at least one of lithium, sodium, potassium, calcium and magnesiumsupported on silicate, as described and claimed in U.S. Pat. No. 4,061,724, the metals [(a)+(b)] being present on the silicalite support in an amount in the range from 0.5 to 15% by weight. The catalyst composition may be modified by addition of the hydrogen form of a crystalline zeolite having the composition expressed as mole ratios of oxides:0.9.+-.0.2 M.sub.2 /.sub.n O:W.sub.2 O.sub.3 :20 to 50 YO.sub.2 :zH.sub.2 Owherein M is at least one cation, n is the valence thereof, W is aluminum and/or gallium, Y is silicon and/or germanium and z has a value of 0 to 40, said zeolite being characterized by an XRD pattern which is substantially that of an MFI-type zeolite.

Abstract: Iron-cobalt spinels which contain low levels of cobalt, in an iron/cobalt atomic ratio of 7:1 to 35:1, are converted to Fischer-Tropsch catalysts upon reduction and carbiding that exhibit high activity and selectivity to C.sub.2 --C.sub.6 olefins and low CH.sub.4 production.

Abstract: Calcium silicate treated with an acid can be used as a polymerization catalyst or as a deodorizing agent. The acid is sulfuric acid, phosphoric acid or nitric acid.

Abstract: Para-xylene is selectively prepared by reacting toluene and a methylating agent in the presence of a phosphorus modified catalyst comprising a silica polymorph intermixed with an inorganic refractory oxide, said catalyst having an alkali content of less than about 1.3 milliequivalents per gram as available alkali.

Abstract: A catalyst containing tungsten, an alkali or alkaline earth component, and iron on a support, preferably silica gel, is disclosed which is useful in reverse disproportionation of stilbene and ethylene to produce styrene.

Abstract: A catalyst containing tungsten, potassium, and bismuth on a support, preferably silica gel, is disclosed which is useful in reverse disproportionation of stilbene and ethylene to produce styrene.

Abstract: A process is described for preparing gasoline boiling range hydrocarbons with a high iso-paraffins content from syngas having a H.sub.2 /CO mol. ratio between 1.0 and 5.0 over a catalyst mixture comprising a methanol synthesis component which contains zinc and one or more metals selected from the group consisting of chromium, copper and aluminum and a crystalline metal silicate with ZSM-5 structure which contains SiO.sub.2 and one or more oxides of a trivalent metal A selected from the group consisting of aluminum, iron, gallium, rhodium, chromium and scandium, and wherein the SiO.sub.2 /A.sub.2 O.sub.3 molar ratio is higher than 10; and which catalyst mixture has been prepared by spray-drying followed by calcining at a temperature between 425.degree. and 525.degree. C.

Abstract: A catalyst containing tungsten, copper, and an alkali or alkaline earth component on a support, preferably silica gel, is disclosed which is useful in reverse disproportionation of stilbene and ethylene to produce styrene.

Abstract: Novel compositions are prepared by reacting magnesium hydride and metal oxide gels in the slurry phase. These compositions are useful as catalysts and catalyst supports.

Abstract: Novel compositions are prepared by reacting barium hydride and metal oxide gels in the slurry phase. These compositions are useful as catalysts and catalyst supports.

Abstract: A catalyst containing tungsten, antimony and an alkali or alkaline earth component on a support, preferably silica gel, is disclosed which is useful in reverse disproportionation of stilbene and ethylene to produce styrene.

Abstract: Hypochlorite ions in aqueous solution are catalytically decomposed by the action of a poly-metal spinel of cobalt preferably coated on an inert, stable support. The spinel catalyst may contain dispersed therein, optionally, other "modifier" metal oxides which contribute better adherence of the spinel to the substrate and improve the toughness of the spinel coating. The substituted cobalt spinel conforms generally to the empirical formulaM.sub.x N.sub.y Co.sub.3-(x+y) O.sub.4where zero<x.ltoreq.1; zero.ltoreq.y.ltoreq.0.5; M is at least one metal of Periodic Table Groups IB, IIA, and IIB; N is at least one metal from Group IA; and zero<(x+2y).ltoreq.1.

Abstract: Bismuth molybdate catalysts formed from a precatalyst slurry which uses an organic liquid or mixture of an organic liquid and water as the liquid medium of the slurry exhibit superior catalytic properties.

Abstract: Aromatic compounds are nitrated in the vapor phase via a process comprising contacting the aromatic compound with a nitrating agent in the presence of a nitration promotion catalyst which comprises the adduct of:(a) an alumina-silica-metal oxide combination represented by the formula:(Al.sub.2 O.sub.3).sub.a (SiO.sub.2).sub.b (M.sub.2/n O).sub.cwherein M is a metal cation selected from the group consisting of the lanthanides or rare earths, Groups 1b, 2b, 5b, 6b, 7b, and 8 of the Periodic Table of the Elements, and mixtures thereof, and a, b, and c represent weight percent of the Al.sub.2 O.sub.3, SiO.sub.2, and M.sub.2/n O components, respectively, in the alumina-silica-metal oxide combination, with a being 0 to 100, b being 0 to 100, and c being 0 to 50, and n represents an integer from 1 to 7 of the valence of the metal cation, with the proviso that the sum of (a+b) must be greater than 0, and(b) a catalytically effective amount of sulfur trioxide.

Abstract: The present invention discloses an improved supported catalyst for gas purification which comprises a catalyst carrier composed of a molded body including alumina cement having a CaO component in an amount of less than 40% by weight, an Al.sub.2 O.sub.3 component in an amount of more than 35% by weight and an iron oxide component in an amount of less than 20% by weight. Additionally, catalytic materials and auxiliary materials may be added, depending on necessity. A platinum group metal is then supported on the catalyst carrier. There is also disclosed a method for manufacturing such catalyst. .Iadd.