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:
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 production of a boron-containing zeolitic material having an MWW framework structure comprising YO2 and B2O3, wherein Y stands for a tetravalent element, wherein said process comprises (a) providing a mixture comprising one or more sources for YO2, one or more sources for B2O3, one or more organotemplates, and seed crystals, (b) crystallizing the mixture obtained in (a) for obtaining a layered precursor of the boron-containing MWW-type zeolitic material, (c) calcining the layered precursor obtained in (b) for obtaining the boron-containing zeolitic material having an MWW framework structure, wherein the one or more organotemplates have the formula (I): R1R2R3N, wherein R1 is (C5-C8)cycloalkyl, and wherein R2 and R3 are independently from each other H or alkyl, as well as to a synthetic boron-containing zeolite which is obtainable and/or obtained according to the inventive process as well as to its use.
Abstract translation:本发明涉及一种生产具有包含YO 2和B 2 O 3的MWW骨架结构的含硼沸石材料的方法,其中Y代表四价元素,其中所述方法包括(a)提供包含一种或多种来源的混合物 对于YO2,一种或多种B 2 O 3,一种或多种有机模板和晶种的来源,(b)使(a)中获得的混合物结晶以获得含硼MWW型沸石材料的层状前体,(c)煅烧 (b)中获得的用于获得具有MWW骨架结构的含硼沸石材料的层状前体,其中所述一种或多种有机模板具有式(I):R1R2R3N,其中R1是(C5-C8)环烷基,其中R2 和R3彼此独立地为H或烷基,以及可根据本发明方法获得和/或获得的合成含硼沸石以及其用途。
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:
A process for the production of a pillared silicate comprises: (i) providing a layered silicate; (ii) interlayer expanding the layered silicate provided in step (i) comprising a step of treating the layered silicate with one or more swelling agents; (iii) treating the interlayer expanded silicate with one or more hydrolysable silicon containing compounds; (iv) treating the interlayer expanded compound with an aqueous solution to obtain a pillared silicate; (v) removing at least a portion of the one or more swelling agents from the pillared silicate; (vi) impregnating the pillared silicate with one or more elements selected from the group consisting of Fe, Ru, Ir, and combinations of two or more thereof, as well as to a pillared silicate optionally obtainable from said process and its use, in particular in a process for the production of one or more olefins.
Abstract:
Sorption store (10) particularly for storing an adsorbed natural gas, said sorption store (10) containing at least one adsorbent medium (40), wherein said sorption store (10) is equipped with an external passive cooling (72).
Abstract:
Provided are a storage unit (12) for a drive system (10) in a vehicle and a method of operating the storage unit (12). The storage unit (12) has at least one sorption store (18),at least one battery (16) and at least one cooling circuit (26), the sorption store (18) is coupled via the cooling circuit (26) to the battery (16). Heat is exchanged between the battery (16) and the sorption store (18). It can provide a very simple and efficient heat management concept for such storage unit (12).