Abstract:
Metal-organic framework extrudates with high packing density and tunable pore volume Abstract The present invention relates to extruded shaped bodies containing at least one metal-organic framework (MOF), methods for their preparation and their use.
Abstract:
The present invention relates to a process for the production of a zeolitic material having an MFI, MEL, and/or MWW-type framework structure comprising YO 2 and X 2 O 3 , wherein said process comprises (1) preparing a mixture comprising one or more sources for YO 2 , one or more sources for X 2 O 3 , 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; wherein Y is a tetravalent element, and X is a trivalent element, and wherein the mixture crystallized in step (2) contains 3wt.-% or less of one or more elements M based on 100 wt-% of YO 2 , wherein M stands for sodium.
Abstract:
A process for the post-treatment of a zeolitic material having a BEA framework structure, the process comprising (i) providing a zeolitic material having a BEA framework structure, wherein the framework structure of the zeolitic material comprises X2O3 and YO2, wherein Y is a tetravalent element and X is a trivalent element and wherein the molar ratio X2O3:YO2 is greater than 0.02:1; (ii) treating the zeolitic material provided in (i) with a liquid solvent system thereby obtaining a zeolitic material having a molar ratio X2O3:YO2 of at most 0.02:1, and at least partially separating the zeolitic material from the liquid solvent system; (iii) treating the zeolitic material obtained from (ii) with a liquid aqueous system having a pH in the range of 5.5 to 8 and a temperature of at least 75° C.
Abstract:
A process for the post-treatment of a zeolitic material having an MWW framework structure, the process comprising (i) providing a zeolitic material having an MWW framework structure, wherein the framework structure of the zeolitic material comprises X 2 O 3 and YO 2 , wherein Y is a tetravalent element and X is a trivalent element and wherein the molar ratio X 2 O 3 : YO 2 is greater than 0.02 : 1; (ii) treating the zeolitic material provided in (i) with a liquid solvent system thereby obtaining a zeolitic material having a molar ratio X 2 O 3 : YO 2 of at most 0.02 : 1, and at least partially separating the zeolitic material from the liquid solvent system; (iii) treating the zeolitic material obtained from (ii) with a liquid aqueous system having a pH in the range of 5.5 to 8 and a temperature of at least 75 °C.
Abstract translation:一种用于后处理具有MWW骨架结构的沸石材料的方法,所述方法包括(i)提供具有MWW骨架结构的沸石材料,其中所述沸石材料的骨架结构包含X 2 O 3和YO 2,其中 Y是四价元素,X是三价元素,并且其中X 2 O 3 :YO 2的摩尔比大于0.02:1; (ii)用液体溶剂体系处理(i)中提供的沸石材料,由此获得具有至多0.02:1的摩尔比X 2 O 3 :YO 2的沸石材料,并且至少部分地将沸石材料与液体分离 溶剂体系; (iii)用具有5.5至8范围内的pH和至少75℃的温度的液体含水体系处理由(ii)获得的沸石材料。
Abstract:
The present invention relates to an improved process for exchanging alkali metal or alkaline earth metal ions in zeolites for ammonium ions. For this exchange, aqueous solutions of ammo- nium salts, for example ammonium sulfate, ammonium nitrate or ammonium chloride, are cur- rently being used. The resulting "ammonium zeolites" are calcined to convert them, with release of ammonia, to the H form of the zeolites suitable as a catalyst. It is proposed in accordance with the invention to use ammonium carbonate instead of the am- monium compounds mentioned. Since excess ammonium carbonate, in contrast to the nitrates, sulfates or chlorides, can be recycled in the form of carbon dioxide and ammonia, the amount of salt which has to be discharged is lowered significantly.