Abstract: The present invention relates to a catalyst for the conversion of oxygenates to olefins, wherein the catalyst comprises one or more zeolites of the MFI, MEL and/or MWW structure type and particles of one or more metal oxides, the one or more zeolites of the MFI, MEL and/or MWW structure type comprising one or more alkaline earth metals, and the particles of the one or more metal oxides comprising phosphorus, the phosphorus being present at least partly in oxidic form, and the one or more alkaline earth metals being selected from the group consisting of Mg, Ca, Sr, Ba and combinations of two or more thereof, to the preparation and use thereof, and to a process for converting oxygenates to olefins using the catalyst.

Abstract: The present invention relates to a method of conditioning suspended catalysts, wherein at least part of the catalyst-comprising reaction medium is taken from one or more reactors and the suspended, at least partially inactivated catalysts are separated off and purified by means of at least one membrane filtration, with at least one of the membrane filtrations being carried out as a diafiltration.

Abstract: The invention provides a process for preparing aromatic amines by catalytically hydrogenating the corresponding nitro compounds, especially for preparing tolylenediamine by hydrogenating dinitrotoluene, which comprises using hydrogenation catalysts in which the active component present is a mixture of platinum, nickel and an additional metal on a support.

Abstract: A method of reforming mixtures of hydrocarbons, preferably methane, and carbon dioxide, wherein the method comprises at least two stages. In a first stage, a reactant gas is contacted with a precious metal catalyst and converted to a first product gas (also referred to hereinafter as product gas 1). In a second stage, the first product gas obtained in the first stage is contacted with a non-precious metal catalyst and converted to a second product gas (also referred to hereinafter as product gas 2). The process can also include adding gases to the product gas 1 obtained in the first stage. The practice of the process can minimize the formation of coke on the catalyst in an efficient manner. The combination of a first stage with a precious metal catalyst and at least one second stage with non-precious metal catalyst allows considerable amounts of costly precious metals to be saved.

Abstract: The present invention relates to a catalyst for the conversion of oxygenates to olefins, wherein the catalyst comprises one or more zeolites of the MFI, MEL and/or MWW structure type and particles of one or more metal oxides, the one or more zeolites of the MFI, MEL and/or MWW structure type comprising one or more alkaline earth metals selected from the group consisting of Mg, Ca, Sr, Ba and combinations of two or more thereof, wherein the catalyst displays a water uptake of 9.0 wt.-% or less, as well as to a process for the production thereof and to its use, in particular in a process for converting oxygenates to olefins.

Abstract: The invention relates to a nickel hexaaluminate-comprising catalyst for reforming hydrocarbons, preferably methane, in the presence of carbon dioxide, which comprises hexaaluminate in a proportion in the range from 65 to 95% by weight, preferably from 70 to 90% by weight, and a crystalline, oxidic secondary phase selected from the group consisting of LaAlO3, SrAl2O4 and BaAl2O4 in the range from 5 to 35% by weight, preferably from 10 to 30% by weight. The BET surface area of the catalyst is ?5 m2/g, preferably ?10 m2/g. The molar nickel content of the catalyst is ?3 mol %, preferably ?2.5 mol % and more preferably ?2 mol %. The interlayer cations are preferably Ba and/or Sr. The process for producing the catalyst comprises the steps: (i) production of a mixture of metal salts, preferably nitrate salts of Ni and also Sr and/or La, and a nanoparticulate aluminum source, (ii) molding and (iii) calcination.

Abstract: The present invention relates to a process for converting oxygenates to olefins, comprising (1) providing a gas stream comprising one or more ethers; (2) contacting the gas stream provided in (1) with a catalyst, the catalyst comprising a support substrate and a layer applied to the substrate, the layer comprising one or more zeolites of the MFI, MEL and/or MWW structure type.

Abstract: The present invention relates to a process for producing a catalyst for the reforming of hydrocarbons, preferably methane, in the presence of CO2, water and/or hydrogen. The production of the catalyst is based on contacting of a hydrotalcite-comprising starting material with a fusible metal salt. The compounds which have been brought into contact with one another are intimately mixed and treated thermally, resulting in the fusible metal salt forming a melt. After molding, the material is subjected to a high-temperature calcination step. The metal salt melt comprises at least one metal selected from the group consisting of K, La, Fe, Co, Ni, Cu and Ce, preferably Ni. The metal salt melt more preferably comprises nickel nitrate hexahydrate.

Abstract: The present invention relates to a gas-phase process for the preparation of butadiene comprising (i) providing a gas stream G-1 comprising ethanol; (ii) contacting the gas stream G-1 comprising ethanol with a catalyst, thereby obtaining a gas stream G-2 comprising butadiene, wherein the catalyst comprises a zeolitic material having a framework structure comprising YO2, Y standing for one or more tetravalent elements, wherein at least a portion of Y comprised in the framework structure is isomorphously substituted by one or more elements X, as well as to a zeolitic material having a framework structure comprising YO2, Y standing for one or more tetravalent elements, wherein at least a portion of Y comprised in the framework structure is isomorphously substituted by one or more elements X, wherein the zeolitic material displays a specific X-ray powder diffraction pattern, and to its use.

Abstract: The present invention relates to a process for producing a catalyst for the reforming of hydrocarbons, preferably methane, in the presence of CO2, water and/or hydrogen. The production of the catalyst is based on contacting of a hydrotalcite-comprising starting material with a fusible metal salt. The compounds which have been brought into contact with one another are intimately mixed and treated thermally, resulting in the fusible metal salt forming a melt. After molding, the material is subjected to a high-temperature calcination step. The metal salt melt comprises at least one metal selected from the group consisting of K, La, Fe, Co, Ni, Cu and Ce, preferably Ni. The metal salt melt more preferably comprises nickel nitrate hexahydrate.

Abstract: The invention relates to a nickel hexaaluminate-comprising catalyst for reforming hydrocarbons, preferably methane, in the presence of carbon dioxide, which comprises hexaaluminate in a proportion in the range from 65 to 95% by weight, preferably from 70 to 90% by weight, and a crystalline, oxidic secondary phase selected from the group consisting of LaAlO3, SrAl2O4 and BaAl2O4 in the range from 5 to 35% by weight, preferably from 10 to 30% by weight. The BET surface area of the catalyst is ?5 m2/g, preferably ?10 m2/g. The molar nickel content of the catalyst is ?3 mol %, preferably ?2.5 mol % and more preferably ?2 mol %. The interlayer cations are preferably Ba and/or Sr. The process for producing the catalyst comprises the steps: (i) production of a mixture of metal salts, preferably nitrate salts of Ni and also Sr and/or La, and a nanoparticulate aluminum source, (ii) molding and (iii) calcination.

Abstract: A process for preparing a catalyst material comprising an electrically conducting support material, a proton-conducting, polyazole-based polymer and a catalytically active material. A catalyst material prepared by the process of the invention. A catalyst ink comprising a catalyst material of the invention and a solvent. A catalyst-coated membrane (CCM) comprising a polymer electrolyte membrane and also catalytically active layers comprising a catalyst material of the present invention. A gas diffusion electrode (GDE) comprising a gas diffusion layer and a catalytically active layer comprising a catalyst material of the invention. A membrane-electrode assembly (MEA) comprising a polymer electrolyte membrane, catalytically active layers comprising a catalyst material of the invention, and gas diffusion layers. And a fuel cell comprising a membrane-electrode assembly of the present invention.

Abstract: A process for preparing olefins by reaction of carbon monoxide with hydrogen in the presence of a an iron-comprising heterogeneous catalyst produced by the following steps: thermal decomposition of gaseous iron pentacarbonyl to give carbonyl iron powder having spherical primary particles; treatment of carbonyl iron powder with hydrogen, resulting in the metallic spherical primary particles at least partially forming agglomerates; contacting the agglomerates with iron pentacarbonyl; and thermal decomposition of the iron pentacarbonyl to give at least predominantly pore-free and void-free secondary particles.

Abstract: A method for removing sulfur-comprising compounds from a hydrocarbonaceous gas mixture, in which an adsorber material is brought into contact with the hydrocarbonaceous gas mixture, wherein the adsorber material comprises a material that adsorbs sulfur-comprising compounds and, in addition, comprises at least one transition metal compound which changes color thereof by reaction with the sulfur-comprising compounds.

Abstract: A catalyst material comprising an electrically conducting support material, a proton-conducting, acid-doped polymer based on a polyazole salt, and a catalytically active material. A process for preparing the catalyst material. A catalyst material prepared by the process of the invention. A catalyst ink comprising the catalyst material of the invention and a solvent. A catalyst-coated membrane (CCM) comprising a polymer electrolyte membrane and also catalytically active layers comprising a catalyst material of the present invention. A gas diffusion electrode (GDE) comprising a gas diffusion layer and a catalytically active layer comprising a catalyst material of the invention. A membrane-electrode assembly (MEA) comprising a polymer electrolyte membrane, catalytically active layers comprising a catalyst material of the invention, and gas diffusion layers. And a fuel cell comprising a membrane-electrode assembly of the present invention.

Abstract: The invention relates to a catalyst for fuel cells which comprises a support, at least one catalytically active metal from the platinum group or an alloy comprising at least one metal of the platinum group and also at least one oxide of at least one metal selected from among Ti, Sn, Si, W, Mo, Zn, Ta, Nb, V, Cr and Zr. The invention further relates to a process for producing such a catalyst and its use.

Abstract: The present invention relates to a catalyst composition and a catalyst material produced therefrom for the steam reforming of methane in fuel cells, in particular for the direct internal reforming of methane in molten carbonate fuel cells. The invention further relates to a process for producing such catalyst compositions.

Abstract: The invention relates to a process for preparing aromatic amines by catalytically hydrogenating the corresponding aromatic nitro compound, which comprises using a copper catalyst with a support comprising SiO2, the SiO2 having been prepared by wet grinding and subsequent spray drying.

Abstract: A catalytically active composition comprising, prior to reduction with hydrogen: 10 to 75% by weight of an oxygen compound of zirconium, calculated as ZrO2; 1 to 30% by weight of an oxygen compound of copper, calculated as CuO; 10 to 50% by weight of an oxygen compound of nickel, calculated as NiO; 10 to 50% by weight of an oxygen compound of cobalt, calculated as CoO; and 0.1 to 10% by weight of one or more oxygen compounds of one or more metals selected from the group consisting of Pb, Bi, Sn, Sb and In, calculated as PbO, Bi2O3, SnO, Sb2O3 or In2O3, respectively.

Abstract: Process for isomerizing linear alpha-olefins having from 10 to 25 carbon atoms over a heterogeneous catalyst.