Abstract: Raney copper which is doped with at least one metal from the group comprising iron and/or noble metals is used as a catalyst in the dehydrogenation of alcohols.

Abstract: Raney copper which is doped with at least one metal from the group comprising iron and/or noble metals is used as a catalyst in the dehydrogenation of alcohols.

Abstract: The invention relates to a method of producing cyanuric chloride by trimerizing chlorocyan at a temperature of at least 250° C. on washed activated carbon as the catalyst. The service life of the catalyst can be improved by using an activated coal with an effective pore volume V eff of equal or greater 0.17 ml/g, with V eff being the result of pores with a pore diameter ranging from 0.5 to 7 nm.

Abstract: Raney copper which is doped with at least one metal from the group comprising iron and/or noble metals is used as a catalyst in the dehydrogenation of alcohols.

Abstract: Raney copper which is doped with at least one metal from the group comprising iron and/or noble metals is used as a catalyst in the dehydrogenation of alcohols.

Abstract: Raney copper which is doped with at least one metal from the group comprising iron and/or noble metals is used as a catalyst in the dehydrogenation of alcohols.

Abstract: Raney copper which is doped with at least one metal from the group comprising iron and/or noble metals is used as a catalyst in the dehydrogenation of alcohols.

Abstract: A process for the oxidation of starch to obtain carbonyl-substituted starch using V, Cr, Mn, Fe, Co or Cu, wherein Fe and/or Cu are preferred as catalyst. The oxidation of the starch proceeds in quasi-dry form by spraying the dry starch with solutions containing hydrogen peroxide and/or the catalyst and mixing the moistened powder. Oxidized starch containing up to approx. 10 carbonyl groups per 100 glucose units is obtainable.

Abstract: Process for producing hydrogen peroxide The invention relates to a process for producing hydrogen peroxide by the cyclic anthraquinone process. According to the invention, the rate of oxidation of a hydrogenated working solution containing a tetrahydroanthrahydroquinone derivative is increased if the oxidation is carried out in the presence of a secondary amine. Preferably a slightly water-soluble secondary amine having a boiling point of at least 150° C., in a quantity of 0.001 to 2 mol per mol of tetrahydro compounds, is used.

Abstract: In carrying out the hydrogenation stage of the anthraquinone process for the preparation of hydrogen peroxide in a hydrogenation reactor on a fixed bed catalyst of a particulate catalyst, the service life of the catalyst is increased in that the working solution comprising the reaction carrier and a gas phase comprising hydrogen, are passed through the hydrogenation reactor from the bottom upwards. The empty tube speed of the working solution is 0.05 to 100 m/h, preferably 10 to 50 m/h.

Abstract: Carrier-bound ruthenium catalysts are used to produce alcohols by the catalytic hydrogenation of aldehydes and ketones. The problem of deactivation of the catalyst is solved by the use of a ruthenium catalyst on an oxide carrier of the series TiO2, SiO2, ZrO2, MgO, mixed oxides thereof and silicates thereof. In particular, Ru on TiO2 or SiO2 results in a long service life of the catalyst.

Abstract: A process for preparing 3-alkoxypropanol by heterogenously catalysed hydrogenation of 3-alkoxypropionaldehyde in alcoholic solution, wherein at least one metal from the group iron, cobalt, nickel, copper, silver, molybdenum, tungsten, vanadium, chromium, rhodium, palladium, osmium, iridium, ruthenium and/or platinum on an oxidic support is used as catalyst.

Abstract: Acetone-cyanhydrin can be produced in a gas-liquid reactor from a hydrogen cyanide-containing gas, especially the crude gas originating from a methane-ammonia (BMA) or Andrussow process, and acetone in the presence of a base. The aim of the invention is to overcome the disadvantages of the methods for producing acetone-cyanhydrin known from the art. To this end, the gaseous phase removed from the reactor is liberated from the unreacted acetone and hydrogen cyanide in a gas purifier that is operated with a high-boiling solvent, especially with stabilized acetone-cyanhydrin, and the washed phase is fed to the gas-liquid reactor.

Abstract: A process for the catalytic hydrogenation of an organic compound, in particular a labile organic compound, in the presence of a support catalyst with a coating containing ruthenium as active metal and a total of 1.01 to 30 wt. % of active metals. Higher stereoselectivity and a greater catalyst shelf life may be obtained by using a support catalyst of which the oxide, carbide, nitride or siliceous support material has a BET (N2) surface area smaller than 10 m2/g, particularly preferably 0.1 to 5 m2/g, prior to loading with at least one active metal diatomaceous earth with a BET (N2) surface area greater than 2 m2/g is excluded and the ruthenium content thereof makes up at least 50 wt. %, preferably at least 99 wt. % of the active metals. The process and the catalysts are particularly suitable for the hydrogenation of polyfunctional compounds such as hydroxycarbonyl compounds and aromatic amines.

Abstract: Raney copper which is doped with at least one metal from the group comprising iron and/or noble metals is used as a catalyst in the dehydrogenation of alcohols.

Abstract: The present invention provides an improved process for the hydrogenation of 3-hydroxypropanal to 1,3-propanediol which comprises purifying an aqueous solution of 3-hydroxypropanal by contacting said aqueous solution with a purifying agent prior to hydrogenation.

Abstract: The invention relates to an improved process for the preparation of hydrogen peroxide by the anthraquinone process, the improvement being directed at decreasing epoxides in the oxidation stage. According to the invention, the hydrogenated working solution, comprising a 2-alkyl-tetrahydroanthrahydroquinone, is mixed with partly or, preferably, completely oxidized working solution and the mixture is oxidized with a gas comprising oxygen in an oxidation reactor. The volume ratio of hydrogenated to oxidized working solution is in the range from 5 to 1 to 1 to 5 and preferably in the range of 2 to 1 to 1 to 2.

Abstract: A two-stage process for producing 1,3-propanediol by first hydrogenating at a temperature of 30° C. to 80° C. in the presence of an oxide-supported metal hydrogenation catalyst. Second, the resulting reaction solution is hydrogenated at a temperature of 80° C. to 180° C. to a 3-hydroxypropanal conversion of substantially 100% in the presence of an activated carbon-supported metal hydrogenation catalyst.

Abstract: 3-Hydroxypropanal is prepared by reacting acrolein with water under pressure and in the presence of an ion exchange resin while adding a carboxylic acid to the reaction mixture.

Abstract: The reductive cleavage of linear and cyclic acetals, especially formals, in an aqueous medium containing a formate takes place by hydrogenation with hydrogen in the presence of a heterogeneous hydrogenation catalyst at a pH value of less than 7 at a temperature of over 200° C. The catalyst-poisoning effect of the formate is overcome at over 200° to 300° C., especially from over 200° to 280° C., so that, in a suspension procedure, the weight ratio of metal having hydrogenating activity to acetal is less than 0.1.