Abstract: A process for the hydrogenation of an organic compound containing at least one carbonyl group comprises bringing the organic compound in the presence of hydrogen into contact with a shaped body which can be produced by a process in which (i) an oxidic material comprising copper oxide, zinc oxide and aluminum oxide is made available, (ii) pulverulent metallic copper or pulverulent cement or a mixture thereof is added to the oxidic material, and (iii) the mixture resulting from (ii) is shaped to form a shaped body.

Abstract: The spinel monolith catalyst is obtainable by a) preparing or coating a molding, especially a monolith, with an at least surfacial active composition comprising a spinel of the general formula (I) AxB(1−x)E2O4  (I)  where A is Cu, of which up to half may be replaced by Co, Fe, Ni, Mn or Cr, B is at least one element selected from the group consisting of Zn, Mg, Ca, Zr, Ce, Sn, Ti, V, Mo and W, E is Al, of which up to half may be replaced by Fe2O3, Cr2O3, Ga2O3, La2O3 or mixtures thereof, x is from 0 to 1, preferably 0 to 0.9, b) impregnating the monolith with a solution of at least one compound of elements of transition group 5 of the periodic table or adding these elements in step a) in the form of their oxides or salts, c) drying and optionally calcining.

Abstract: This invention relates to an improved process of producing hydrogen and carbon dioxide by the catalytical process of methanol reformation. The improvement resides in the use of catalysts made up substantially of metal oxides selected from the group consisting of Al2O3, TiO2, ZrO2 and ZnO, and which catalyst is in the form of a substantially cylindrical tablet having a maximum diameter in the range from 0.8 to 2.0 mm and a maximum height in the range of from 0.5 to 2.0 mm.

Abstract: A storage catalyst includes (1) a component that has a catalytic reducing action for nitrogen oxides at least in the presence of hydrocarbons, and (2) a component that stores NOx at least at temperatures of below 100° C. The catalytically active component is of the general chemical formula AaBbO4, where A is one or more divalent metals and B is one or more trivalent metals, and where a+b≦3 and a, b>0. The reaction enthalpy or the chemical activity between the catalytically active component and the NOx-storing component is low at least up to temperatures of 600° C.

Abstract: A process for pretreating a catalyst material for catalysing a chemical reaction in a reactor, in particular for a reforming catalyst material for catalysing a methanol reforming reaction to obtain hydrogen, includes (1) subjecting the catalyst material to a hydrogen-containing gas mixture in a forming step, and (2) subsequently subjecting the catalyst material to an oxygen-containing gas mixture in a deactivating step.

Abstract: A process for producing solids by precipitation in a mixer to form a mixture of solid and liquid, where the starting materials are fed into a mixing apparatus which has essentially a rotationally symmetrical mixing chamber which has a rotor disposed therein and is formed by a peripheral wall and two end walls, and where a) the starting materials are each fed to at least one inlet opening in the peripheral wall of the mixing chamber, and b) the solid-containing mixture which is formed is removed from at least one outlet opening in the peripheral wall of the mixing chamber.

Abstract: In a process for preparing spinel extrudates by extruding molding compositions comprising spinel powder with or without extrusion assistants, stabilizers, shrinkage reducers, pore-formers or mixtures thereof subsequent drying and calcination of the extrudates, the molding composition further comprises aluminum oxides or aluminum oxide hydrates and metal nitrates.

Abstract: A process for the catalytic reduction of NO.sub.x, the reduction taking place in the presence of a catalyst which comprises(a) from 20 to 97 wt % of A.sub.2 O.sub.3,(b) from 1 to 40 wt % of CuO,(c) from 1 to 50 wt % of ZnO,(d) from 1 to 40 wt % of Ag,(e) from 0 to 2 wt % of Pt,(f) from 0 to 20 wt % of oxides of rare earth metals, elements of the 3rd subgroup of the Periodic Table of the Elements or mixtures thereof,based on the total weight of the components (a) to (e), which adds up to 100 wt %, wherein, in each case, up to half the weight of the component (a) may be replaced by Fe.sub.2 O.sub.3, Cr.sub.2 O.sub.3, Ga.sub.2 O.sub.3 or mixtures thereof, of the component (b) by CoO, of the component (c) by MgO, of the component (d) by Au and of the component (e) by Pd, Ru, Os, Ir, Rh, Re or mixtures thereof, is used for reducing NO.sub.x, especially in combustion off-gases, the components (a), (b) and (c) forming a spinel which is doped with the components (d), (e) and (f).

Abstract: In a process for steam-reforming methanol, in which methanol and water are reacted at a catalyst with formation of hydrogen, the catalyst used can be prepared by(a) precipitating a solution of zinc salts and aluminum salts, the atomic ratio of Zn:Al being from 3:1 to 1:3, with an alkali metal carbonate solution or alkali metal hydroxide solution at a pH in the range from 5 to 12 and at from 20 to 100.degree. C.,(b) separating off and washing the precipitate to remove alkali metal ions,(c) drying the precipitate,(d) calcining the precipitate at from 250 to 800.degree. C. to give a mixed oxide,(e) dispersing the mixed oxide in an acidic solution of copper salts and zinc salts, the atomic ratio of Cu:Zn being from 1:5 to 20:1 in the solution,(f) precipitating the dispersion with an alkali metal carbonate solution or alkali metal hydroxide solution at a pH in the range from 6 to 9 and at from 20 to 100.degree. C.