Abstract:
A process for the preparation of butadiene comprising (i) providing a gas stream G-1 comprising ethanol; (ii) contacting the gas stream G-1 provided in (i) with a catalyst, thereby obtaining a gas stream G-2 comprising butadiene; wherein the catalyst comprises a crystalline material supporting one or more catalytically active metals M, as well as to the use of the crystalline material supporting one or more catalytically active metals M.
Abstract:
Providing a catalyst and a process for the preparation of butadiene, and the catalyst comprising Hf and two or more further catalytically active metals M1 and M2, wherein the two or more further catalytically active metals M1 and M2 are selected from the group consisting of Zr, Zn, Cu and combinations of two or more thereof, and wherein M1 is different from M2.
Abstract:
The present invention relates to a process for the preparation of a zeolitic material having a CHA-type framework structure comprising YO2 and X2O3, wherein said process comprises the steps of: (1) providing a mixture comprising one or more sources for YO2, one or more sources for X2O3, one or more tetraalkylammonium cation R1R2R3R4N+-containing compounds, and one or more tetraalkylammonium cation R5R6R7R8N+-containing compounds as structure directing agent; (2) crystallizing the mixture obtained in step (1) for obtaining a zeolitic material having a CHA-type framework structure; wherein Y is a tetravalent element and X is a trivalent element, wherein R1, R2, R3, R4, R5, R6, and R7 independently from one another stand for alkyl, and wherein R8 stands for cycloalkyl, 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 comprising the step of converting methane to ethene under non-oxidative conditions in the presence of a catalyst comprising (a) a zeolite with a largest pore opening which is larger than 8; (b) a metal whereas the metal (b) is loaded onto the zeolite (a); and whereas the zeolite (a) is selected from zeolites -with a maximum diameter of a sphere that can be included of 4.5 A or smaller and/or -with a maximum diameter of a sphere which can diffuse along a of 4.4 A or smaller and/or -with a maximum diameter of a sphere which can diffuse along b of 4.4 A or smaller and/or -with a maximum diameter of a sphere which can diffuse along c of 4.4 A or smaller. Zeolite (a) is preferably a RRO catalyst, in particular RUB-41.
Abstract:
The present invention relates to a process for the preparation of a pillared silicate compound comprising a layered silicate structure and bridging silicon atoms located between adjacent silicate layers of the silicate structure, wherein said bridging silicon atoms form at least one covalent bond to each of the adjacent silicate layers, said process comprising (1) providing one or more layered silicates; (2) adding said one or more layered silicates to a solvent system, wherein the resulting mixture has a pH of 5 or less; and (3) subjecting the mixture obtained in step (2) to solvothermal conditions; wherein no silicon-containing compound according to formula (I) R4-mSi[-(SiR2)n-R]m (I) is used at any point of the process up to and including step (3), wherein m is 1, 2, 3, or 4, and n is an integer greater than or equal to 0, wherein when n is equal to 0, one or more residues R are leaving groups, and wherein none of the residues R contains Si, as well as to a pillared silicate compound per se, preferably as obtained and/or obtainable according to the inventive process as well as to the use of the inventive compounds. A further process is disclosed wherein a sulfur oxoacid is present in step (2), and wherein a silicon-containing compound may or may not be used.
Abstract:
A method of dehydration of at least one compound (A) comprising, in the chain form, -at least one hydroxyl group and -at least one carbonyl functionality selected from the group consisting of aldehyde (CHO), ke- tone (CO) and carboxylic acid (COOH) and mixtures thereof,in the presence of at least one zeolite which is (a) obtainable from an organotemplate-free synthetic process and (b) isomorphously substituted comprising silicon, aluminum and at least one further metal wherein the at least one further metal is selected from the group consisting of the elements of Group 3 to 14 in Period 4 to 6and mixtures thereof.
Abstract:
Disclosed are methods, apparatuses, and systems for producing at least one chemical product associated with one or more environmental attribute(s) and for assigning at least one environmental attribute to at least one chemical product produced by a chemical production network.
Abstract:
Procedimiento para la preparación de un material zeolítico que tiene una estructura de armazón de tipo MFI, que comprende las etapas de: (1) proporcionar una mezcla que comprende una o más fuentes para YO2 y uno o más compuestos que contienen un catión de alqueniltrialquilamonio R1R2R3R4N+ como agente de control de estructura; y (2) cristalizar la mezcla obtenida en la etapa (1) para obtener un material zeolítico; en el que Y es un elemento tetravalente, y en el que R1, R2 y R3 independientemente entre sí representan n-propilo; y R4 representa 2-propen-1-ilo o 1-propen-1-ilo.
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.