Abstract: A process for preparing a catalyst which process comprises preparing a mixture comprising iron oxide and at least one Column 1 metal or compound thereof, wherein the iron oxide is obtained by heating a mixture comprising an iron halide and at least 0.05 millimoles of a Column 6 metal per mole of iron; a catalyst made by the above described process; an iron oxide composition; a process for the dehydrogenation of an alkylaromatic compound which process comprises contacting the alkylaromatic compound with the catalyst; and a method of using an alkenylaromatic compound for making polymers or copolymers, in which the alkenylaromatic compound has been produced by the dehydrogenation process.

Abstract: A catalyst composition is disclosed that includes chromium, oxygen, and gold as essential constituent elements. The amount of gold in the composition is from about 0.05 atom % to about 10 atom % based on the total amount of chromium and gold. Also disclosed is a process for changing the fluorine distribution (i.e., content and/or arrangement) in a hydrocarbon or halogenated hydrocarbon in the presence of the catalyst composition; and methods for preparing said catalyst composition. One preparation method involves; (a) co-precipitating a solid by adding ammonium hydroxide (aqueous ammonia) to an aqueous solution of a soluble gold salt and a soluble chromium salt that contains at least three moles of nitrate per mole of chromium in the solution and has a gold content of from about 0.

Abstract: A process for preparing acrolein from glycerol using an acidic solid-state catalyst which comprises tungsten compounds and further promoters.

Abstract: This invention relates to methods for making a stabilized transition alumina of enhanced hydrothermal stability, which include the introduction of at least one structural stabilizer; a steaming step before or after the introduction step, wherein steaming is effective in transforming a transition alumina at least partially to boehmite and/or pseudoboehmite; and a calcining step to create a stabilized transition alumina. The combination of the structural stabilizer and the steaming step is believed to impart high hydrothermal stability to the alumina crystal lattice. Particularly preferred structural stabilizers include boron, cobalt, and zirconium. The stabilized transition alumina is useful as a catalyst support for high water partial pressure environments, and is particularly useful for making a catalyst having improved hydrothermal stability. The invention more specifically discloses Fischer-Tropsch catalysts and processes for the production of hydrocarbons from synthesis gas.

Abstract: The present invention relates to a method of producing a catalyst or pre-catalyst suitable for assisting in the production of alkenyl alkanoates. The method includes contacting a modifier precursor to a support material to form a modified support material. One or more catalytic component precursors (palladium or gold) may be contacted to the modified support material. The atomic ratio of gold to palladium is preferably in the range of about 0.3 to about 0.90. The support materials with the catalytic component may then be reduced using a reducing environment. A composition for catalyzing the production of an alkenyl alkanoates including a modified support material with palladium and gold is also included within the invention. Catalysts of the present invention may be used to produce alkenyl alkanoates in general and vinyl acetate in particular and are useful to produce low EA/VA ratios while maintaining or improving CO2 selectivity.

Abstract: A process for treating a carrier, or a precursor thereof, to at least partly remove impurities comprising contacting the carrier, or the precursor thereof, with a treatment solution comprising a salt; a process for preparing a catalyst; the catalyst; a process for preparing an olefin oxide by reacting an olefin with oxygen in the presence of the catalyst; and a process for preparing a 1,2-diol, a 1,2-diol ether or an alkanolamine.

Abstract: An ammoxidation catalyst comprising a molybdenum (component (1)), bismuth (component (2)), at least one element selected from the group consisting of nickel, cobalt, zinc, magnesium, manganese and copper (component (3)) and at least one element selected from the group consisting of lanthanum, cerium, praseodymium and neodymium (component (4)), over which an organic compound is subject to ammoxidation which is a composite oxide fluid bed catalyst, is prepared by i) preparing a first solution that comprises at least a portion of component (1), at least a portion of component (2), and at least a portion of component (3) but none of component (4); ii) preparing a second solution by adding a solution of component (4) to the first solution; and iii) drying the second solution obtained and calcining the solid matter obtained from the drying step.

Abstract: The invention relates to a catalyst containing alkali tungstate for the synthesis of alkylmercaptanes from alkanols and hydrogen sulphide, in addition to a method for the production of said catalyst, wherein the molar ratio of alkali to tungstan is<2:1.

Abstract: The invention relates to a method for the oxidative dehydrogenation of ethane. The inventive method is characterized in that it consists of bringing the ethane into contact with the catalyst containing Mo, Te, V, Nb and at least a fifth element A which is selected from Cu, Ta, Sn, Se, W, Ti, Fe, Co, Ni, Cr, Zr, Sb, Bi, an alkali metal, an alkaline-earth metal and a rare earth, in which at least Mo, Te, V and Nb are present in the form of at least one oxide, said catalyst presenting, in calcined form, an X-ray diffractogram with more than ten intense diffraction lines, typically, the most intense lines corresponding to diffraction angles 2? of 7.7°±0.4, 8.9°±0.4, 22.1°+0.4, 26.6°±0.4, 26.9°±0.4, 27.1°±0.4, 28.1°±0.4, 31.2°±0.4, 35.0°±0.4 and 45.06°±0.

Abstract: Modified metal oxide catalysts are disclosed which have different chemical, physical and catalytic properties, when used for catalytic conversions of carbon based compounds, as compared to corresponding unmodified metal oxide catalysts. Methods for preparing the modified catalysts are described and their utility in catalytic process is described. Alkenes, unsaturated saturated carboxylic acids, saturated carboxylic acids and their higher analogues are prepared directly from corresponding alkanes, alkenes or alkanes and alkenes utilizing using one or more modified metal oxide catalysts.

Abstract: The invention relates to a process for producing a metal oxide catalyst capable of producing acrylic acid, acrylonitrile or the like in one stage by catalytic oxidation reaction of propane in a high yield. The invention is characterized by using one obtained by finely ground metallic Te or metallic Sb in water or an organic solvent as a raw material for the production of an oxide catalyst made of metal elements Mo—V—Nb—Te or metal elements Mo—V—Nb—Sb. The powder of the metallic Te or metallic Sb obtained by grinding preferably has a mode size of not more than 20 ?m. By using the metal oxide obtained by the invention as a catalyst, it is possible to produce acrylic acid in a high yield of 35% or more from propane by a one-stage oxidation reaction.

Abstract: The present invention relates to a method for preparing a catalyst for partial oxidation of acrolein, particularly to a method for preparing a catalyst for partial oxidation of acrolein that has a superior acrolein conversion rate, acrylic acid activity, selectivity, and yield, by introducing a base solution and an acid solution into a catalyst suspension prepared by dissolving salts of metal ingredients of the catalyst in water to control the acidity of the catalyst suspension, contacting the catalyst suspension of which acidity is controlled with an inert support to support the catalyst thereon, and then drying and firing the supported catalyst.

Abstract: A method for producing a catalyst for use in the dehydrogenation of ethylbenzene to styrene is disclosed. The catalyst of the present invention comprises a high purity metal and at least one promoter in the form of solid oxides, oxide hydrates, hydroxides, hydroxycarbonates or metals. The catalyst is prepared via a method which comprises the preparation of at least one high purity iron precursor with or without an additional support material and which uses a nominal amount of water in the catalyst production. The catalyst pellets prepared with the high purity metal precursor are essentially free of sulfur and chloride contaminants.

Abstract: A catalyst composition having the formula: Mo1VaSbbNbcMdOx wherein M is gallium, bismuth, silver or gold, a is 0.01 to 1, b is 0.01 to 1, c is 0.01 to 1, d is 0.01 to 1 and x is determined by the valence requirements of the other components. Other metals, such as tantalum, titanium, aluminum, zirconium, chromium, manganese, iron, ruthenium, cobalt, rhodium, nickel, platinum, boron, arsenic, lithium, sodium, potassium, rubidium, calcium, beryllium, magnesium, cerium, strontium, hafnium, phosphorus, europium, gadolinium, dysprosium, holmium, erbium, thulium, terbium, ytterbium, lutetium, lanthanum, scandium, palladium, praseodymium, neodymium, yttrium, thorium, tungsten, cesium, zinc, tin, germanium, silicon, lead, barium or thallium may also be components of the catalyst. This catalyst is prepared by co-precipitation of metal compounds which are calcined to form a mixed metal oxide catalyst that can be used for the selective conversion of an alkane to an unsaturated carboxylic acid in a one-step process.

Abstract: The present invention is for a process for making a catalyst for production of unsaturated aldehydes, such as methacrolein, by gas phase catalytic oxidation of olefins, such as isobutylene, said catalyst containing oxides of molybdenum, bismuth, iron, cesium, tungsten, cobalt, nickel, antimony, magnesium and zinc. The process is a two-part synthesis of the catalyst with the water insoluble components in one part and the water soluble components in the other part. The water insoluble components are co-precipitated to form an intermediate catalyst precursor of a precipitated support incorporating oxides of the metal components. The intermediate catalyst precursor is filtered and washed to remove nitrates. The intermediate catalyst precursor is slurried with the remaining water soluble components. A final catalyst precursor is formed by removing the water and incorporating the water soluble components. This two-part process reduces the amount of nitrates in the final catalyst precursor.

Abstract: Provided herein are catalysts useful in reductive amination, which include nickel, copper, zirconium and/or chromium, oxygen, and tin. The presence of the tin increases the selectivity of the catalyst in reductive aminations over the catalysts of the prior art.

Abstract: A catalyst contains at least one group VIII element and at least molybdenum and/or tungsten, said elements being present at least in part in the catalyst in the dry state in the form of at least one heteropolyanion with formula MxAB6O24H6C(3-2x), tH2O; MxAB6O24H6C(4-2x), tH2O; MxA2B10O38H4C(6-2x), tH2O; MxA2B10O38H4C(8-2x), tH2O; or MxA2B10O38H4C(7-2x), tH2O, in which M is cobalt and/or nickel and/or iron and/or copper and/or zinc, A is one or two elements from group VIII of the periodic table, B is molybdenum and/or tungsten and C is an H+ ion and/or a (NR1R2R3R4)+ type ammonium ion, in which R1, R2, R3 and R4, which may be identical or different, correspond either to a hydrogen atom or to an alkyl group and/or caesium and/or potassium and/or sodium, t is a number between 0 and 15 and x takes a value in the range 0 to 4 depending on the formula.

Abstract: Coated catalysts which are suitable for the gas-phase catalytic oxidation of propene to acrolein are prepared by a process in which rings are used as supports and water is used as a binder.

Abstract: A multimetal oxide material contains the elements Mo, V and Te and/or Sb and at least one of the elements Nb, Ti, W, Ta and Ce and promoters and has a specific X-ray diffraction pattern. Moreover, such a multimetal oxide material is used as a catalyst for heterogeneously catalyzed gas-phase partial oxidations of hydrocarbons.

Abstract: This invention provides novel stable metallic mesoporous transition metal oxide molecular sieves and methods for their production. The sieves have high electrical conductivity and may be used as solid electrolyte devices, e.g., in fuel cells, as sorbents, e.g. for hydrogen storage, and as catalysts. The invention also provides room temperature activation of dinitrogen, using the sieves as a catalyst, which permits ammonia production at room temperature.

Abstract: A gel composition substantially contained within the pores of a solid material is disclosed for use as a catalyst or as a catalyst support in dehydrogenation and dehydrocyclization processes.

Abstract: A silica-rich support and a catalyst containing the silica-rich support and a catalytic component. The support has a specific structure characterized by a set of claimed physicochemical properties: in the 29Si MAS NMR spectrum the state of silicon is characterized by the presence of lines with chemical shifts ?100±3 ppm (line Q3) and ?110±3 ppm (line Q4), with the ratio of the integral intensities of the lines Q3/Q4 of from 0.7 to 1.2 (FIG. 1); in the IR spectrum there is an absorption band of hydroxyl groups with the wave number 3620–3650 cm?1 and half-width 65–75 cm?1 (FIG. 2); the carrier has a specific surface area, as measured by the BET techniques from the thermal desorption of argon, SAR=0.5–30 m2/g and the surface, as measured by alkali titration techniques, SNa=10–250 m2/g, with SNa/SAr=5–30.

Abstract: A process for preparing a multimetal oxide material which contains the elements Mo, V and Te and/or Sb and at least one of the elements Nb, Ti, W, Ta and Ce and if desired promoters and has a specific X-ray diffraction pattern, in which process the last process step comprises washing with acidic liquids. In addition, a multimetal oxide material obtainable in such a way is used as a catalyst for heterogeneously catalyzed gas-phase partial oxidations and/or ammoxidation of hydrocarbons.

Abstract: The present invention provides new platinum group metal (“PGM”) free catalytic compositions that comprise silver and/or cobalt stabilized ceria. These compositions facilitate soot oxidation during the regeneration of diesel particulate filters (DPF) thereby replacing PGM formulations. The compositions of the invention are particularly useful as washcoat compositions for DPFs as part of an automotive after-treatment system. Among the formulations tested, the silver-stabilized ceria and cobalt-stabilized ceria formulations e.g. can oxidize soot at 250–300° C. in the presence of NO2 and oxygen, while silver-stabilized ceria can oxidize diesel soot even in the presence of oxygen as the sole oxidizing agent at these temperatures. A perovshite composition containing Ag—La—Mn was very active at temperatures above 300° C.

Abstract: One aspect of the invention relates to a dehydrogenation catalyst composite containing alumina, chromium oxide, lithium oxide, and sodium oxide. The invention also relates to methods of making the dehydrogenation catalyst composite. Another aspect of the invention relates to method of dehydrogenating a dehydrogenatable hydrocarbon involving contacting the dehydrogenatable hydrocarbon with a dehydrogenation catalyst composite containing alumina, chromium oxide, lithium oxide, and sodium oxide to provide a dehydrogenated hydrocarbon, such as an olefin.

Abstract: Raney alloy catalysts applied to a support are described, said catalysts having an extremely thin layer of Raney alloy with a thickness of 0.01 to 100 ?m. These catalysts are prepared by vapor deposition of the appropriate metals under reduced pressure. They are generally suitable for all known hydrogenation and dehydrogenation reactions and are extremely abrasion-resistant.

Abstract: A catalyst composition for the production of carboxylic acids by the oxidation of the corresponding unsaturated aldehydes, and methods for making and using the catalyst compositions. The catalysts include compositions of the formula: MoaVbAlcXdYeOz wherein X is at least one element selected from W and Mn; Y is at least one element selected from Pd, Sb, Ca, P, Ga, Ge, Si, Mg, Nb, and K; a is 1; b is 0.01–0.9; c is 0<0.2; d is 0<0.5; e is 0<0.5; and z is an integer representing the number of oxygen atoms required to satisfy the valency of the remaining elements in the composition. Using the catalyst composition of the present invention, one may effectively oxidize the desired starting materials at relatively high levels of conversion, selectivity, and productivity, and with minimal side products.

Abstract: Olefinically unsaturated hydrocarbons are prepared from corresponding paraffinic hydrocarbons, in particular propylene is prepared from propane, by dehydrogenation over a catalyst comprising an oxide of a transition metal of group IV B of the Periodic Table, eg. TiO2 or ZrO2, and possibly at least one element selected from among elements of transition group VIII, eg. palladium, platinum or rhodium, and/or an element of transition group VI, eg. chromium, molybdenum or tungsten, and/or rhenium and/or tin and possibly a compound of an alkali metal or alkaline earth metal, a compound of main group III or transition group III or zinc.

Abstract: A process for making a catalyst containing oxides of molybdenum, bismuth, iron, cesium and, optionally, other metals, such as tungsten, cobalt, nickel, antimony, magnesium, zinc, phosphorus, potassium, rubidium, thallium, manganese, barium, chromium, boron, sulfur, silicon, aluminum, titanium, cerium, tellurium, tin, vanadium, zirconium, lead, cadmium, copper and niobium wherein metal compounds are dissolved and then precipitated as a catalyst precursor which is calcined to form a mixed metal oxide catalyst. The process of the present invention uses an organic acid, such as acetic acid, instead of nitric acid to dissolve the bismuth compound and, optionally, other metal compounds. The catalyst synthesized by this process may be used for the production of unsaturated aldehydes, such as methacrolein, by gas phase catalytic oxidation of olefins, such as isobutylene.

Abstract: Disclosed is a method for direct application of a catalyst to a substrate for treatment of atmospheric pollution including ozone. The method includes applying a catalytic metal to a substrate utilizing a thermal spray process. The process can be utilized to apply a base metal such as copper to a substrate and the base metal becomes the catalytically active oxide during and following application to the substrate. This system replaces a multi-step process within a single step process to provide a catalytically active surface that can be utilized to reduce ground level ozone and other atmospheric pollutants.

Abstract: Modified lead/bismuth/molybdate catalysts containing vanadium, copper, or gold have been prepared, and are selective to the corresponding furan compound from the gas phase oxidation of an unsaturated acyclic hydrocarbon such as butadiene.

Abstract: A catalyst composition for the selective conversion of an alkane to an unsaturated carboxylic acid having the general formula: MoVaNbbAgcMdOx wherein optional element M may be one or more selected from aluminum, copper, lithium, sodium, potassium, rubidium, cesium, gallium, phosphorus, iron, rhenium, cobalt, chromium, manganese, arsenic, indium, thallium, bismuth, germanium, tin, cerium or lanthanum; a is 0.05 to 0.99, b is 0.01 to 0.99, c is 0.01 to 0.99, d is 0 to 0.5 and x is determined by the valence requirements of the other components of the catalyst composition. This catalyst is prepared by co-precipitation of compounds of molybdenum, vanadium, niobium, silver and M to form a mixed metal oxide catalyst. This catalyst can be used for the selective conversion of an alkane to an unsaturated carboxylic acid in a one-step process or the ammoxidation of alkanes and olefins.

Abstract: Microspheroidal particles, suitable as fluidized bed catalyst supports, are prepared by incorporating a portion of small, preferably recycled, particles into a slurry of inorganic oxide sol and inorganic particles which is spray dried to form microspheroidal particles.

Abstract: A process for preparing an antimonate-based mixed metal oxide catalyst in a catalytically active oxidized state, wherein the catalyst is represented by the empirical formula MeaSbbXcQdReOf, wherein Me, X, Q, R, a, b, c, d, e, and f are as defined herein, comprising (a) contacting an aqueous Sb2O3 slurry with HNO3 and one or more Me compounds, and, optionally, one or more compounds selected from X, Q, or R compounds to form a first mixture; (b) heating and drying the first mixture to form a solid product; and (c) calcining the solid product to form the catalyst, the catalysts prepared by the process, and the use of the catalysts in ammoxidation and oxidation processes. The catalysts of the invention are particularly useful for the production of acrylonitrile from propylene, ammonia, and an oxygen-containing gas.

Abstract: A catalyst useful for catalytic vapor-phase oxidation of isobutylene, t-butanol or propylene to produce respectively corresponding unsaturated aldehyde and unsaturated carboxylic acid is provided. The catalyst consists of ring-formed shaped bodies composed of (i) a catalyst composition containing at least molybdenum and bismuth as the active ingredients and (ii) inorganic fibers. The catalyst excels in mechanical strength, can give the object products at high yield and shows little activity degradation with time.

Abstract: A molybdenum-based precipitate is prepared according to a process including the first step of forming a crude precipitate by pH adjustment to 6.5 or less in the presence of an alkali metal compound, and the second step of dissolving the crude precipitate in aqueous ammonia and forming a precipitate by pH adjustment to 6.5 or less. Then, the resulting molybdenum-based precipitate is washed with an acid aqueous solution having a pH of 6.5 or less and containing not less than 0.01 mole/L of ammonium root. Thus, a change in average particle diameter can be suppressed and good workability can be achieved, so that a molybdenum-based precipitate having a high purity and a desired average particle diameter can be obtained.

Abstract: The present invention provides an exhaust gas purifying catalyst that is capable of substantially reducing the degree of deterioration in an exhaust gas purifying capability, which results from dissipation of an absorbent agent. Accordingly, an exhaust gas purifying catalyst, which includes a carrier and a catalyst layer, and to which at least one material selected from a group of alkali metals and alkali earth metals is added as an absorbent agent, is characterized in that acid material with a high affinity with respect to the absorbent agent is mixed in the catalyst layer so as to fix the absorbent agent, and an inhibiting layer is formed between the catalyst layer and the carrier so as to inhibit the movement of the absorbent agent toward the carrier.

Abstract: The object of the present invention is to provide a ceramic body that can support a required amount of a catalyst component, without lowering the characteristics such as strength, being manufactured without forming a coating layer and providing a high performance ceramic catalyst that is excellent in practical utility and durability. A noble metal catalyst is supported directly on the surface of the ceramic body and the second component, consisting of compound or composite compound of element having d or f orbit in the electron orbits thereof such as W, Co, Ti, Fe, Ga and Nb, is dispersed in the first component made of cordierite or the like that constitutes the substrate ceramic. The noble metal catalyst can be directly supported by bonding strength generated by sharing the d or f orbits of the second component, or through interaction with the dangling bond that is generated in the interface between the first component and the second component.

Abstract: Multimetal oxide materials containing molybdenum, vanadium, antimony, one or more of the elements W, Nb, Ta, Cr and Ce and nickel and, if required, one or more of the elements Cu, Zn, Co, Fe, Cd, Mn, Mg, Ca, Sr and Ba and having a 2-component structure are used for the gas-phase catalytic oxidative preparation of acrylic acid.

Abstract: In an exhaust gas purifying catalyst, an acid material with a high affinity with respect to an absorbing agent is dispersed and mixed in a catalyst layer, to which the absorbing agent is added, or a layer of the acid material is formed inside the catalyst layer in order to prevent the absorbing agent from moving from the catalyst layer into the carrier. This reduces the permeation of the absorbing agent added to the catalyst layer into a carrier, the evaporation and splash of the absorbing agent from the catalyst, and the deterioration in the durability and the exhaust gas purifying performance of the catalyst.

Abstract: A catalyst suited for catalytic vapor-phase oxidation of isobutylene, t-butanol or propylene to produce respectively corresponding unsaturated aldehyde and unsaturated carboxylic acid is provided. Said catalyst consists of ring-formed shaped bodies composed of (i) a catalyst composition containing at least molybdenum and bismuth as the active ingredients and (ii) inorganic fibers. The catalyst excels in mechanical strength, can give the object products at high yield and shows little activity degradation with time.

Abstract: An exhaust gas emission purifying catalyst has a catalyst layer (20) supported on a carrier (10). The catalyst layer includes a composite oxide, in which noble metals and occluding agents are mixed in order to inhibit the movement of the occluding agents even at high temperatures and to prevent deterioration of the purifying performance of the catalyst after operation at a high temperature. The composite oxide is comprised of silicon (Si) and at least one of cobalt (Co), zirconium (Zr), iron (Fe), and manganese (Mn).

Abstract: The present invention relates to a catalyst containing gold in elemental or bound form and molybdenum in oxidation state +VI, and to a process for the oxidation of a hydrocarbon containing at least one double bond to an epoxide, which process involves reacting the hydrocarbon with oxygen in the presence of hydrogen and in the presence of the catalyst according to the invention.

Abstract: A catalyst for the nonoxidative production of alkenylaromatics from alkylaromatics, wherein the catalyst is predominantly iron oxide, an alkali metal compound, copper oxide, cerium oxide and less than about 100 ppm of a source for a noble metal, such as palladium, platinum, ruthenium, rhenium, osmium, rhodium or iridium. Additional components of the catalyst may include compounds based on molybdenum, tungsten, calcium, magnesium, chromium and other such promoters.

Abstract: A process for producing a molybdenum-bismuth-iron-containing metal oxide fluidized bed catalyst which has a controlled particle diameter and has satisfactory activity and physical properties. In a process for producing a fluidized bed catalyst containing molybdenum-bismuth-iron and silica as a carrier component, dried products formed in a spray drying step and having a particle diameter outside a desired range are pulverized, then the pulverized one is mixed into a slurry before spray drying, the resulting mixture is spray-dried, and the spray-dried particles are subjected to a classification operation to obtain particles having a diameter within the desired range, which are then calcined. The catalyst produced according to the present invention is suitable for producing acrylonitrile by ammoxidation of propylene.

Abstract: An orthorhombic phase mixed metal oxide is produced selectively in quantitative yield.

Abstract: An additive used in catalytic cracking of hydrocarbons, which is in the form of homogeneous liquid and comprises a composite metal compound, wherein said composite metal compound consists of the oxides, hydroxides, organic acid salts, inorganic acid salts or metal organic complex compounds of at least one of the 1st group metals and at least one of the 2nd group metals, wherein the 1st group metals are selected from the group consisting of the metals of the IIIA, IVA, VA, VIA groups of the Element Period Table, boron, silicon, phosphorous and tellurium; wherein the 2nd group metals are selected from the group consisting of alkali-earth metals, transition metals, and rare earth metals, is disclosed. A process of catalytic cracking of hydrocarbons, utilizing the additive is also disclosed. The additive can passivate metals and promote the oxidation of CO, and is operated easily with production cost decreased.

Abstract: The present invention relates to the continuous production of nano-scale precious metal particles on SiH-containing support materials, the compositions themselves, and the use of these precious metal-containing compositions as catalyst. The continuous process according to the invention includes impregnating support materials and, after thermal activation, drying the support materials by spraying or by fluidized bed technology leads to form precious metal-containing support compositions that are active in the catalysis of oxidation reactions. The catalytically active precious metal-containing support compositions exhibit high selectivities and productivities and have very long catalyst service lives without deactivation. The invention also relates to a process for the oxidation of hydrocarbons in the presence of oxygen, a reducing agent and the precious-metal containing support compositions of the present invention.

Abstract: A lean NOx catalyst and method of preparing the same is disclosed. The lean NOx catalyst includes a ceramic substrate, an oxide support material, preferably &ggr;-alumina, deposited on the substrate and a metal promoter or dopant introduced into the oxide support material. The metal promoters or dopants are selected from the group consisting of indium, gallium, tin, silver, germanium, gold, nickel, cobalt, copper, iron, manganese, molybdenum, chromium, cerium, vanadium, oxides thereof, and combinations thereof. The &ggr;-alumina preferably has a pore volume of from about 0.5 to about 2.0 cc/g; a surface area of between about 80 to 350 m2/g; an average pore size diameter of between about 3 to 30 nm; and an impurity level of less than or equal to 0.2 weight percent. In a preferred embodiment the &ggr;-alumina is prepared by a sol-gel method, with the metal doping of the &ggr;-alumina preferably accomplished using an incipient wetness impregnation technique.

Abstract: A method for improving the selectivity of a supported highly selective epoxidation catalyst comprising silver in a quantity of at most 0.