Abstract:
A process for the preparation of a copper containing zeolitic material having CHA framework structure and a composition comprising the molar ratio (n YO2):X2O3 wherein X is a trivalent element, preferably Al, Y is a tetravalent element, preferably Si, and wherein n is preferably at least 20, the process comprising the preparation of an phosphor-free aqueous solution containing at least one source for X2O3 and at least one source for YO2, at least one structure directing agent suitable for the preparation of a zeolitic material having CHA framework structure, and at least one Cu source, and the process further comprising the hydrothermal crystallization of said aqueous solution obtaining a suspension containing the copper containing zeolitic material having CHA framework structure.
Abstract translation:一种制备具有CHA骨架结构的含铜沸石材料和包含摩尔比(n YO 2):X 2 O 3的组合物的方法,其中X是三价元素,优选Al,Y是四价元素,优选Si,其中n 优选至少为20,该方法包括制备含有至少一种X 2 O 3源和至少一种YO源的无磷水溶液,至少一种适于制备具有CHA骨架的沸石材料的结构导向剂 结构和至少一个Cu源,并且所述方法还包括所述水溶液的水热结晶,得到含有具有CHA骨架结构的含铜沸石材料的悬浮液。
Abstract:
A process for the oxidation of an organic carbonyl compound comprising reacting the organic carbonyl compound, optionally in the presence of a solvent, with hydrogen peroxide in the presence of a catalyst comprising a tin-containing zeolitic material having an MWW-type framework structure.
Abstract:
Described is a method of charging a sorption store with a gas. The sorption store comprises a closed container and a feed device which has a passage through the container wall, through which the gas can flow into the container, and the container has at least two parallel, channel-shaped subchambers which are located in its interior and are each at least partly filled with an adsorption medium and whose channel walls are coolable. The method comprises, in a first step, feeding in a gas in such an amount that a pressure in the store of at least 30% of a predetermined final pressure is reached as quickly as possible and, in a second step, subsequently varying the amount of gas fed in in such a way that the course of the pressure in the store approximates the adsorption kinetics of the adsorption medium until the predetermined final pressure in the store is reached after a predetermined period of time.
Abstract:
The present invention relates to an organotemplate-free synthetic process for the production of a zeolitic material having a CHA-type framework structure comprising YO2, X2O3, and optionally comprising Z2O5, wherein said process comprises the steps of: (1) providing a mixture comprising one or more sources for YO2, one or more sources for X2O3, and seed crystals having a CHA framework structure, wherein the CHA framework structure of the seed crystals comprises YO2, X2O3, and optionally comprises Z2O5; and (2) crystallizing the mixture obtained in step (1); wherein Y is a tetravalent element, X is a trivalent element, and Z is a pentavalent element, wherein optionally one or more sources for Z2O5 are further provided in step (1), and wherein if the CHA framework of the seed crystals does not contain Z2O5, the seed crystals then have a YO2:X2O3 molar ratio of 5 or greater than 5.
Abstract translation:本发明涉及一种用于生产具有包含YO 2,X 2 O 3和任选地包含Z 2 O 5的CHA型骨架结构的沸石材料的有机模板合成方法,其中所述方法包括以下步骤:(1)提供包含 YO2的一种或多种来源,X 2 O 3的一种或多种来源和具有CHA骨架结构的晶种,其中晶种的CHA骨架结构包含YO 2,X 2 O 3,并且任选包含Z 2 O 5; 和(2)使步骤(1)中获得的混合物结晶; 其中Y是四价元素,X是三价元素,Z是五价元素,其中在步骤(1)中还可以任选地提供一种或多种Z2O5源,并且其中如果晶种的CHA骨架不包含 Z2O5,然后晶种的YO 2:X 2 O 3摩尔比为5或大于5。
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:
A process for the oxidation of an organic carbonyl compound comprising reacting the compound, optionally in the presence of a solvent, with hydrogen peroxide in the presence of a catalyst comprising a tin-containing zeolitic material and at least one potassium salt.
Abstract:
A process for preparing a tin-containing zeolitic material having a BEA framework structure comprising providing a zeolitic material having a BEA framework structure having vacant tetrahedral framework sites, providing a tin-ion source in solid form, incorporating tin into the zeolitic material via solid-state ion exchange, calcining the zeolitic material, and treating the calcined zeolitic material with an aqueous solution having a pH of at most 5.
Abstract:
The present invention relates to a gas-phase process for the preparation of butadiene comprising (i) providing a gas stream G-1 comprising ethanol; (ii) contacting the gas stream G-1 comprising ethanol with a catalyst, thereby obtaining a gas stream G-2 comprising butadiene, wherein the catalyst comprises a zeolitic material having a framework structure comprising YO2, Y standing for one or more tetravalent elements, wherein at least a portion of Y comprised in the framework structure is isomorphously substituted by one or more elements X, as well as to a zeolitic material having a framework structure comprising YO2, Y standing for one or more tetravalent elements, wherein at least a portion of Y comprised in the framework structure is isomorphously substituted by one or more elements X, wherein the zeolitic material displays a specific X-ray powder diffraction pattern, and to its use.
Abstract:
Described is a process for the production of a zeolitic material having an MFI, MEL, and/or MWW-type framework structure comprising YO2 and X2O3. The process comprises (1) preparing a mixture comprising one or more sources for YO2, one or more sources for X2O3, and one or more solvents; (2) crystallizing the mixture obtained in step (1) to obtain a zeolitic material having an MFI, MEL and/or MWW-type framework structure; and (3) impregnating the zeolitic material obtained in step (2) with one or more elements selected from the group of alkaline earth metals. Y is a tetravalent element, and X is a trivalent element. The mixture crystallized in step (2) contains 3 wt.-% or less of one or more elements M based on 100 wt-% of YO2, wherein M stands for sodium.
Abstract:
The present invention relates to a process for the recovery of an at least bidentate organic compound comprised in a porous metal-organic framework material, the material comprising the at least bidentate organic compound coordinated to at least one metal ion, the process comprising the steps of (a) treating the metal-organic framework material with an acidic or alkaline liquid; (b) optionally separating off solid residue; and (c) isolating the at least bidentate organic compound.