Abstract: The present invention refers to a process for the preparation of a high surface area nanoparticulate alpha alumina.

Abstract: The present invention refers to a process for oligomerization of acetylene in the presence of hydrogen and a solid catalyst.

Abstract: The present invention refers to a process for oligomerization of acetylene in the presence of hydrogen and a solid catalyst.

Abstract: The present invention refers to processes for preparing catalyst loaded polyphenylene particles, the so-obtained polyphenylene particles and their use as catalysts.

Abstract: The present invention relates to the use of mesoporous graphitic particles having a loading of sintering-stable metal nanoparticles for fuel cells and further electrochemical applications, for example as constituent of layers in electrodes of fuel cells and batteries.

Abstract: The present invention refers to highly sinter-stable metal nanoparticles supported on mesoporous graphitic spheres, the so obtained metal-loaded mesoporous graphitic particles, processes for their preparation and the use thereof as catalysts, in particular for high temperature reactions in reducing atmosphere and cathode side oxygen reduction reaction (ORR) in PEM fuel cells.

Abstract: The present invention refers to processes for preparing catalyst loaded polyphenylene particles, the so-obtained polyphenylene particles and their use as catalysts.

Abstract: The present invention relates to a method for breaking down lignocellulose biomass. In said method, acid-impregnated lignocellulose biomass, e.g., beech wood, pine wood or sugarcane bagasse, is subjected to a mechanical treatment and the obtained break-down residues are fed to a process of separation into water-soluble and water-insoluble components.

Abstract: The present invention relates to a method for obtaining a high yield of sugar alcohols containing five to six carbon atoms from cellulose-containing materials. In a first step the starting materials (for example microcrystalline cellulose, alpha-cellulose, wood and cellulose-containing residues, such as sugar cane bagasse or wood shavings) and an acid are brought into close contact with the substrates by a impregnation carried out in the liquid or gaseous phase. In addition, in a second step the starting materials impregnated with acid and preferably dried are brought into contact by the action of mechanical energy, such that the cellulose-containing materials are degraded into water-soluble products. Subsequently, in a third step, sugar alcohols having five to six carbon atoms are obtained in a high yield and in high selectivity from the water-soluble products in aqueous solution by hydrolytic hydrogenation by means of a metal-containing catalyst under hydrogen pressure.

Abstract: The present invention relates to a method for obtaining a high yield of sugar alcohols containing five to six carbon atoms from cellulose-containing materials. In a first step the starting materials (for example microcrystalline cellulose, alpha-cellulose, wood and cellulose-containing residues, such as sugar cane bagasse or wood shavings) and an acid are brought into close contact with the substrates by a impregnation carried out in the liquid or gaseous phase. In addition, in a second step the starting materials impregnated with acid and preferably dried are brought into contact by the action of mechanical energy, such that the cellulose-containing materials are degraded into water-soluble products. Subsequently, in a third step, sugar alcohols having five to six carbon atoms are obtained in a high yield and in high selectivity from the water-soluble products in aqueous solution by hydrolytic hydrogenation by means of a metal-containing catalyst under hydrogen pressure.

Abstract: The present invention refers to highly sinter-stable metal nanoparticles supported on mesoporous graphitic spheres, the so obtained metal-loaded mesoporous graphitic particles, processes for their preparation and the use thereof as catalysts, in particular for high temperature reactions in reducing atmosphere and cathode side oxygen reduction reaction (ORR) in PEM fuel cells.

Abstract: The present invention relates to the use of mesoporous graphitic particles having a loading of sintering-stable metal nanoparticles for fuel cells and further electrochemical applications, for example as constituent of layers in electrodes of fuel cells and batteries.

Abstract: A method is disclosed for the acid-catalyzed oligomerization of monosaccharides and/or disaccharides in which monosaccharides or disaccharides are subjected to a mechanical treatment in the presence of an inorganic and/or organic acid. During said process, a catalytic conversion of the monosaccharides or disaccharides takes place.

Abstract: A process for the preparation of carbon protected superparamagnetic or magnetic nanospheres is claimed which comprises the steps: (A) coating FexOy particles with an organic polymer, (B) coating the product obtained in step (A) with silica, (C) subjecting the product of step (B) to pyrolysis conditions, and (D) removing silica. According to present process, structurally stable carbon protected magnetic nanospheres were obtained, which can be dispersed in various solvents like water, EtOH, toluene, etc.

Abstract: A method for the acid-catalyzed depolymerization of cellulose comprises a mechanical treatment of cellulose in the presence of an inorganic and/or organic acid. The catalytic conversion of cellulose into water-soluble products is virtually completely achieved in that celluoligomers, cellubiose, glucose and glycerol are obtained without significant byproduction.

Abstract: Platinum(II) complexes and the use of these complexes for oxidation of methane to methyl sulfate are disclosed, the catalyst having, as ligands, a network based on aromatic N-heterocycles which has at least 2 coordinative nitrogen atoms per platinum atom, and the complex anion is selected from a halide, hydrogensulfate, hydrogensulfite, sulfate, sulfite, methylsulfate, methanol, water, hydroxide, carbon monoxide, hydrogencarbonate and carbonate. The catalyst enables a selective low-temperature oxidation of methane to methyl sulfate or methanol. The catalysts not only exhibit high activity, but can also be removed easily from the reaction mixture and reused over several runs without significant loss of activity.

Abstract: The array of heterogeneous catalysts and/or their precursors, is made up of a body which has, preferably parallel, through-channels and in which at least n channels comprise n different heterogeneous catalysts and/or their precursors, where n is 2, preferably 10, particularly preferably 100, in particular 1000, especially 10,000.

Abstract: Method for determining useful properties of individual building blocks of a material library including a substrate having at least two individual building blocks in at least two sections separated from one another, which method includes: (ii) introducing at least one starting material into at least two sections of a substrate of a material library which are separated from one another, in order to carry out a chemical or physical or chemical and physical reaction of the starting material in the at least two substrate sections separated from another, in each case in the presence of the corresponding building block, obtaining in each case an effluent comprising at least one reaction product and/or starting material and, (iii) analysing the effluent obtained in the reaction according to (ii) comprising at least one reaction product and/or starting material; the effluent being analysed by recording and analysing at least one photoacoustic signal.

Abstract: Zirconium dioxide which is monoclinic to at least 80% by weight and has a BET surface area of at least 100 m.sup.2 /g is prepared by admixing aqueous zirconium salt solutions with ammonia, drying and calcining the precipitation product, aging the precipitation product, prior to drying, in aqueous phase at from 0 to 300.degree. C. and carrying out the calcination at from 200 to 600.degree. C.