Abstract: A hydrogenation catalyst includes copper oxide, an alkali metal, and an acid-stabilized silica, wherein hydrogenation catalyst has a Brunauer-Emmett-Teller (“BET”) surface area of greater than or equal to about 15 m2/g. The hydrogenation catalysts are effective for converting aldehydes, ketones, and esters to alcohols and/or diesters to diols.

Abstract: A screw conveyor assembly includes a first screw conveyor with a first housing and a first conveyor screw arranged therein, a second screw conveyor with a second housing and a second conveyor screw arranged therein, a transition housing to which the first housing and the second housing are connected forming a transition angle, and a runner disposed in the transition housing and arranged to conduct material being conveyed from the first conveyor screw to the second conveyor screw. The first conveyor screw is arranged upstream of the second conveyor screw. An additional conveyor element is disposed on a helix of the first conveyor screw, such that the helix is directly adjacent to the transition housing.

Abstract: Disclosed herein is a membrane-electrode assembly containing: a gastight, selectively proton-conducting membrane which has a retentate side having an anode and a permeate side having a cathode; a voltage source for generating a potential difference between the anode and the cathode; an anode catalyst having a catalytically active material on the retentate side; and a cathode catalyst having a catalytically active material on the permeate side, in which the cathode catalyst has a smaller amount of catalytically active material than the anode catalyst. The present disclosure also includes a reactor containing the membrane-electrode assembly, and a process for separating off hydrogen using the membrane-electrode assembly.

Abstract: The present invention relates to a process for producing iron-doped ruthenium-carbon support catalysts and also their use for the selective liquid-phase hydrogenation of carbonyl compounds to the corresponding alcohols, in particular for the hydrogenation of citral to geraniol or nerol or of citronellal to citronellal.

Abstract: The present invention relates to a method for hydrogenating aromatic compounds with hydrogen in the presence of a catalyst, in which the catalyst comprises ruthenium on a zirconium oxide support material, and also the use of a catalyst comprising ruthenium on a zirconium oxide support material for hydrogenating aromatic compounds.

Abstract: The present invention relates to a process for the preparation of a zeolitic material comprising the steps of: (1) providing a mixture comprising one or more sources for YO2 and one or more alkenyltrialkylammonium cation R1R2R3R4N+-containing compounds as structure directing agent; and (2) crystallizing the mixture obtained in step (1) to obtain a zeolitic material; wherein Y is a tetravalent element, and wherein R1, R2, and R3 independently from one another stand for alkyl; and R4 stands for alkenyl, as well as to zeolitic materials which may be obtained according to the inventive process and to their use.

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: A screw conveyor assembly includes a first screw conveyor with a first housing and a first conveyor screw arranged therein, a second screw conveyor with a second housing and a second conveyor screw arranged therein, a transition housing to which the first housing and the second housing are connected forming a transition angle, and a runner disposed in the transition housing and arranged to conduct material being conveyed from the first conveyor screw to the second conveyor screw. The first conveyor screw is arranged upstream of the second conveyor screw. An additional conveyor element is disposed on a helix of the first conveyor screw, such that the helix is directly adjacent to the transition housing.

Abstract: The present invention relates to a process for producing iron-doped ruthenium-carbon support catalysts and also their use for the selective liquid-phase hydrogenation of carbonyl compounds to the corresponding alcohols, in particular for the hydrogenation of citral to geraniol or nerol or of citronellal to citronellal.

Abstract: The present invention relates to a process for hydrogenating 4,4?-methylenedianiline and/or polymeric MDA with hydrogen in the presence of a catalyst comprising ruthenium on a zirconium oxide support material, and also to the use of a catalyst comprising ruthenium on a zirconium oxide support material for hydrogenating 4,4?-methylenedianiline and/or polymeric MDA.

Abstract: The present invention relates to a process for the preparation of a zeolitic material comprising the steps of: (1) providing a mixture comprising one or more sources for YO2 and one or more alkenyltrialkylammonium cation R1R2R3R4N+-containing compounds as structure directing agent; and (2) crystallizing the mixture obtained in step (1) to obtain a zeolitic material; wherein Y is a tetravalent element, and wherein R1, R2, and R3 independently from one another stand for alkyl; and R4 stands for alkenyl, as well as to zeolitic materials which may be obtained according to the inventive process and to their use.

Abstract: The present invention relates to a process for hydrogenating 4,4?-methylenedianiline and/or polymeric MDA with hydrogen in the presence of a catalyst comprising ruthenium on a zirconium oxide support material, and also to the use of a catalyst comprising ruthenium on a zirconium oxide support material for hydrogenating 4,4?-methylenedianiline and/or polymeric MDA.

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 present invention relates to a process for the preparation of a zeolitic material comprising the steps of: (1) providing a mixture comprising one or more sources for YO2 and one or more alkenyltrialkylammonium cation R1R2R3R4N+-containing compounds as structure directing agent; and (2) crystallizing the mixture obtained in step (1) to obtain a zeolitic material; wherein Y is a tetravalent element, and wherein R1, R2, and R3 independently from one another stand for alkyl; and R4 stands for alkenyl, as well as to zeolitic materials which may be obtained according to the inventive process and to their use.

Abstract: The present invention relates to a method for hydrogenating aromatic compounds with hydrogen in the presence of a catalyst, in which the catalyst comprises ruthenium on a zirconium oxide support material, and also the use of a catalyst comprising ruthenium on a zirconium oxide support material for hydrogenating aromatic compounds.

Abstract: The invention relates to a catalytically active body for the synthesis of dimethyl ether from synthesis gas. In particular, the invention relates to an improved catalytically active body for the synthesis of dimethyl ether, whereby the components of the active body comprise a methanol active component and an acid component comprising a zeolitic material being crystallized by means of one or more alkenyltrialkylammonium cation R1R2R3R4N+-containing compounds as structure directing agent. Furthermore, the present invention concerns a method for the preparation of a catalytically active body, the use of the catalytically active body and a method for the preparation of dimethyl ether from synthesis gas.

Abstract: The present invention relates to a process for the preparation of a zeolitic material comprising the steps of: (1) providing a mixture comprising one or more sources for YO2 and one or more alkenyltrialkylammonium cation R1R2R3R4N+-containing compounds as structure directing agent; and (2) crystallizing the mixture obtained in step (1) to obtain a zeolitic material; wherein Y is a tetravalent element, and wherein R1, R2, and R3 independently from one another stand for alkyl; and R4 stands for alkenyl, as well as to zeolitic materials which may be obtained according to the inventive process and to their use.

Abstract: The present invention relates to a process for direct amination of hydrocarbons to amino hydrocarbons, comprising (a) the reaction of a reactant stream E comprising at least one hydrocarbon and at least one aminating reagent to give a reaction mixture R comprising at least one amino hydrocarbon and hydrogen in a reaction zone RZ, and (b) electrochemical removal of at least a portion of the hydrogen formed in the reaction from the reaction mixture R by means of at least one gas-tight membrane electrode assembly which is in contact with the reaction zone RZ on the retentate side and which has at least one selectively proton-conducting membrane, at least a portion of the hydrogen being oxidized over an anode catalyst to protons on the retentate side of the membrane, and the protons, after passing through the membrane, being partly or fully reacted with an oxidizing agent over a cathode catalyst to give water on the permeate side, and the oxidizing agent originating from a stream O which is contacted with the

Abstract: The present invention relates to a process for direct amination of hydrocarbons to amino hydrocarbons, comprising (a) the reaction of a reactant stream E comprising at least one hydrocarbon and at least one aminating reagent to give a reaction mixture R comprising at least one amino hydrocarbon and hydrogen in a reaction zone RZ, and (b) electrochemical removal of at least a portion of the hydrogen formed in the reaction from the reaction mixture R by means of at least one gas-tight membrane electrode assembly which is in contact with the reaction zone RZ on the retentate side and which has at least one selectively proton-conducting membrane, at least a portion of the hydrogen being oxidized over an anode catalyst to protons on the retentate side of the membrane, and the protons, after passing through the membrane, being partly or fully reduced by applying a voltage over a cathode catalyst to give hydrogen on the permeate side.