Abstract: The present invention relates to an improved process for manufacturing of esters of 2,5-furandicarboxylic acid (FD-CA-esters) by reacting 2,5-furandicarboxylic acid (FDCA) with one or more alcohols in the presence of a heterogeneous catalyst. The use of the heterogeneous catalyst, which may be a Bronsted or Lewis acid, allows for production of high yields of FDCA esters. Furthermore, the catalyst can conveniently be recycled after completion of the reaction.

Abstract: The invention relates to a method for obtaining organic compounds from biomass, wherein the steps of gas stripping, adsorption from the gas phase, and catalytic reaction are coordinated with each other. The method according to the invention preferably comprises the steps of fermentation, gas stripping, adsorption, desorption, catalytic reaction, condensation, and decantation, which can proceed in parallel. The invention further relates to the coupling of adsorption, desorption, and catalytic reaction by using the same zeolite material for adsorption and catalytic reaction.

Abstract: A method is described for producing acyl glycinate salts of formula (II) in which R1 represents a saturated linear or branched alkyl radical comprising 1 to 21 carbon atoms or a monounsaturated or polyunsaturated linear or branched alkenyl radical comprising 2 to 21 carbon atoms, and B represents a cation, and/or the corresponding protonated acyl glycinic acid. Said method is characterized in that one or more fatty acid monoethanol amides of formula (I) in which R1 has the meaning indicated above is/are oxidized with oxygen in the presence of an optionally supported bimetallic catalyst consisting of gold and a metal from group VIII of the periodic table in the alkaline medium in order to obtain one or more acyl glycinate salts of formula (II). In order to produce the protonated acyl glycinic acids, the acyl glycinate salt/s of formula (II) is/are additionally reacted with an acid.

Abstract: A process is described for preparing acylglycinate salts of the formula (II) in which R1 is a saturated linear or branched alkyl radical having from 1 to 21 carbon atoms or a mono- or polyunsaturated linear or branched alkenyl radical having from 2 to 21 carbon atoms, and B is a cation derived from a base, and/or the corresponding protonated acylglycines, characterized in that one or more fatty acid monoethanolamides of the formula (I) in which R1 is as defined above is oxidized with oxygen in the presence of a transition group metal catalyst in an alkaline medium to give one or more acylglycinate salts of the formula (II), and, in the case of preparation of the protonated acylglycines, the acylglycinate salt(s) of the formula (II) is additionally reacted with an acid.

Abstract: The invention relates to a method for producing compounds of formula (I) in which R1 represents an aromatic group containing 6 to 200 carbon atoms, R2 represents hydrogen, a linear or branched alkyl group containing 1 to 22 carbon atoms, a monounsaturated or polyunsaturated linear or branched alkenyl group containing 2 to 22 carbon atoms, or an aryl group containing 6 to 12 carbon atoms, X represents an alkylene group containing 2 to 4 carbon atoms, n represents a number between 0 and 100, and B represents a cation or hydrogen, and/or the corresponding protonated carboxylic acids, by oxidizing one or more compounds of formula (II) in which R1, R2, X, and n have the meaning indicated above, with oxygen or oxygen-containing gases in the presence of a gold-containing catalyst and at least one alkaline compound.

Abstract: The invention relates to a method for producing 1,2-propanediol, in that a liquid phase comprising at least 95 wt.-% glycerin is reacted with hydrogen in the presence of a copper-containing, powdered catalyst in a continuously operated stirred reactor at a pressure of 50 to 90 bar, wherein the stationary yield of the reaction is at least 60%.

Abstract: The invention relates to a method for preparing 1,2-propanediol by reacting glycerol, which has a purity of at least 95 wt %, with hydrogen at a hydrogen pressure from 20 to 100 bar and a temperature from 180 to 240° C. in the presence of a catalyst, which comprises 20 to 60 wt % of copper oxide, 30 to 70 wt % of zinc oxide and 1 to 10 wt % manganese oxide in an autoclave.

Abstract: A method is described for producing acyl glycinate salts of formula (II) in which R1 represents a saturated linear or branched alkyl radical comprising 1 to 21 carbon atoms or a monounsaturated or polyunsaturated linear or branched alkenyl radical comprising 2 to 21 carbon atoms, and B represents a cation, and/or the corresponding protonated acyl glycinic acid. Said method is characterized in that one or more fatty acid monoethanol amides of formula (I) in which R1 has the meaning indicated above is/are oxidized with oxygen in the presence of an optionally supported bimetallic catalyst consisting of gold and a metal from group VIII of the periodic table in the alkaline medium in order to obtain one or more acyl glycinate salts of formula (II). In order to produce the protonated acyl glycinic acids, the acyl glycinate salt/s of formula (II) is/are additionally reacted with an acid.

Abstract: A process is described for preparing acylglycinate salts of the formula (II) in which R1 is a saturated linear or branched alkyl radical having from 1 to 21 carbon atoms or a mono- or polyunsaturated linear or branched alkenyl radical having from 2 to 21 carbon atoms, and B is a cation derived from a base, and/or the corresponding protonated acylglycines, characterized in that one or more fatty acid monoethanolamides of the formula (I) in which R1 is as defined above is oxidized with oxygen in the presence of a transition group metal catalyst in an alkaline medium to give one or more acylglycinate salts of the formula (II), and, in the case of preparation of the protonated acylglycines, the acylglycinate salt(s) of the formula (II) is additionally reacted with an acid.

Abstract: The invention provides a process for preparing 1,2-propanediol, by reacting glycerol which has a purity of at least 95% by weight with hydrogen at a hydrogen pressure of from 20 to 100 bar and a temperature of from 180 to 240 DEG C. in the presence of a catalyst which comprises from 10 to 50% by weight of copper oxide and from 50 to 90% by weight of zinc oxide in an autoclave.

Abstract: The invention relates to a method for preparing 1,2-propanediol by reacting glycerol, which has a purity of at least 95 wt %, with hydrogen at a hydrogen pressure from 20 to 100 bar and a temperature from 180 to 240° C. in the presence of a catalyst, which comprises 20 to 60 wt % of copper oxide, 30 to 70 wt % of zinc oxide and 1 to 10 wt % manganese oxide in an autoclave.

Abstract: The invention relates to a method for producing alkyl polyglycol carboxylic acids and polyglycol dicarboxylic acids by means of direct oxidation.

Abstract: The invention provides a process for preparing 1,2-propanediol, by reacting glycerol which has a purity of at least 95% by weight with hydrogen at a hydrogen pressure of from 20 to 100 bar and a temperature of from 180 to 240 DEG C. in the presence of a catalyst which comprises from 10 to 50% by weight of copper oxide and from 50 to 90% by weight of zinc oxide in an autoclave.

Abstract: The invention relates to an axle guide consisting of a fiber-synthetic material composite for guiding an axle in the running gear of a rail vehicle, in particular a high-speed rail vehicle. Said guide has two end sections (11, 11?) for connecting the guide (1) both to the axle and to the chassis (2) of the running gear in a manner resistant to torsion and a central section (12) located therebetween, which has a longitudinal axis (13) aligned with the direction of travel (X) and across-section that is at least partially flat in the vertical direction (Z). The guide (1) has at least one integrated flexural joint (14) with a vertical flexural axis (15) and enables a rotational degree of freedom, which protects the wheel beating from damaging flexural stresses, to be achieved simply without the need for an additional joint component.

Abstract: The invention relates to an axle guide consisting of a fibre-synthetic material composite for guiding an axle in the running gear of a rail vehicle, in particular a high-speed rail vehicle. Said guide has two end sections (11, 11′) for connecting the guide (1) both to the axle and to the chassis (2) of the running gear in a manner resistant to torsion and a central section (12) located therebetween, which has a longitudinal axis (13) aligned with the direction of travel (X) and across-section that is at least partially flat in the vertical direction (Z). The guide (1) has at least one integrated flexural joint (14) with a vertical flexural axis (15) and enables a rotational degree of freedom, which protects the wheel beating from damaging flexural stresses, to be achieved simply without the need for an additional joint component.

Abstract: The present invention relates to a novel process for the preparation of 2,3-pentanedione starting with hydroxyacetone and paraldehyde.

Abstract: The present invention relates to a novel process for the preparation of 2,3-pentanedione starting with hydroxyacetone and paraldehyde.