Abstract:
The present invention relates to a process for the preparation of zeolites having CHA framework structure and a composition comprising the molar ratio (n SiO2):X2O3, wherein X is a trivalent element, and wherein n is at least 10, the process comprising (i) preparation of an aqueous solution containing at least one source for X2O3, wherein X is selected from Al, B, Ga, and a mixture of two or more, and at least one source for SiO2, at least one organic structure directing agent (SDA) other than Tetramethylammonium hydroxide (TMAOH), acting as a template for the CHA structure, and Tetramethylammonium hydroxide (TMAOH), wherein the SDA or mixtures thereof are employed in such amounts that the aqueous solution in (i) exhibits a molar ratio of SDA:TMAOH of 0.01 to 5; (ii) hydrothermal crystallization of the aqueous solution according to (i); wherein the aqueous solution of (i) contains copper in an amount less than 0.005 Cu: ((n YO2)+X2O3) where n is in the range of 10 to 50. The present invention also relates to the zeolitic materials obtainable and/or obtained by this process as well as to a zeolitic material as such, having framework structure CHA, having a composition comprising the molar ratio (n SiO2):X2O3, wherein X is a trivalent element and n is at least 10, and wherein the crystal size, as determined from Scanning Electron Microscopy, is greater than 1 micrometer and wherein the chabazite framework is phase-pure having an impurity of other zeolitic frameworks, such as RUT as determined by X-ray Diffraction, of less than 5%.
Abstract translation:本发明涉及一种制备具有CHA骨架结构的沸石和包含摩尔比(n SiO 2):X 2 O 3的组合物的方法,其中X是三价元素,并且其中n至少为10,该方法包括(i )制备含有至少一种X 2 O 3的源的水溶液,其中X选自Al,B,Ga,以及两种或更多种的混合物和至少一种SiO 2源,至少一种有机结构导向剂(SDA ),作为CHA结构的模板的四甲基氢氧化铵(TMAOH)和氢氧化四甲基铵(TMAOH),其中SDA或其混合物的使用量使得(i)中的水溶液表现出的摩尔比为SDA :TMAOH为0.01〜5; (ii)根据(i)的水溶液的水热结晶; 其中(i)的水溶液含有小于0.005 Cu:((n YO 2)+ X 2 O 3)的铜,其中n在10至50的范围内。本发明还涉及可获得的和/或 通过该方法获得的沸石材料以及具有骨架结构CHA的沸石材料,其具有包含摩尔比(n SiO 2):X 2 O 3的组成,其中X是三价元素,n至少为10,并且其中晶体 通过扫描电子显微镜测定的尺寸大于1微米,其中菱沸石框架是相纯的,具有小于5%的其它沸石骨架的杂质,例如通过X射线衍射测定的RUT。
Abstract:
A tin containing zeolitic material having an MWW-type framework structure (Sn-MWW), having a tin content of at most 2 weight-%, calculated as element and based on the weight of the Sn-MWW, and having an X-ray diffraction pattern comprising peaks at 2 theta diffraction angles of (6.6±0.1)°, (7.1±0.1)°, and (7.9±0.1)°.
Abstract:
Described is a storage unit for a drive system in a vehicle. The storage unit has at least one sorption store, at least one battery, and at least one cooling circuit. The sorption store is coupled via the cooling circuit to the battery. Further described is a method of operating the storage unit and also a drive system and a vehicle equipped with such a storage unit.
Abstract:
Porous metal organic frameworks formed by AlIII ions to which fumarate ions are coordinated to produce a framework structure; shaped bodies comprising such porous metal organic frameworks, and also the preparation and use thereof for the uptake of a substance for the purposes of its storage, controlled release, separation, chemical reaction or as support.
Abstract:
Aspects of the present invention relate 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, and one or more tetraalkylammonium cation R1R2R3R4N+-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, and R3 independently from one another stand for alkyl, wherein R4 stands for cycloalkyl, and wherein the mixture provided in step (1) does not contain any substantial amount of a source for Z2O5, wherein Z is P, as well as to zeolitic materials which may be obtained according to the inventive process and to their use.
Abstract translation:本发明的方面涉及制备具有包含YO 2和X 2 O 3的CHA型骨架结构的沸石材料的方法,其中所述方法包括以下步骤:(1)提供包含一种或多种YO 2, 一种或多种X2O3源和一种或多种四烷基铵阳离子R1R2R3R4N +化合物作为结构导向剂; (2)使步骤(1)中得到的混合物结晶得到具有CHA型骨架结构的沸石材料; 其中Y是四价元素,X是三价元素,其中R1,R2和R3彼此独立地代表烷基,其中R4代表环烷基,并且其中步骤(1)中提供的混合物不含任何实质的量 的Z 2 O 5的源,其中Z是P,以及可以根据本发明方法获得的沸石材料及其用途。
Abstract:
The present invention relates to porous films comprising (A) from 51 wt.-% to 99.9 wt.-% based on the total weight of the film of at least one porous metal-organic framework material, the material comprising at least one at least bidentate organic compound coordinated to at least one metal ion; (B) from 0.1 wt.-% to 49 wt.-% based on the total weight of the film of at least one fibrillated fluoropolymer; and (C) 0 wt.-% to 48.9 wt.-% based on the total weight of the film of an additive component. The invention further relates to a composition for preparing such a film and its use.
Abstract:
A process for preparing a tin-containing zeolitic material having framework type BEA, comprising providing an aqueous synthesis mixture comprising a boron source, a silicon source, and a BEA structure directing agent; subjecting the synthesis mixture provided in to hydrothermal pre-crystallization conditions; adding the tin source to the obtained mixture; subjecting the obtained aqueous synthesis mixture to hydrothermal crystallization conditions, obtaining a tin-containing zeolitic material having framework type BEA comprised in its mother liquor.
Abstract:
The invention relates to a process for the preparation of metal-organic frameworks (MOFs) in form of a homogenous powder, and a process wherein the metal-organic framework is molded into shaped bodies.
Abstract:
The invention is related to a storage vessel (1) comprising a shaped body (3) of a porous solid, wherein the storage vessel (1) comprises a wall (5) with a section (7) comprising at least one inlet (9), wherein the storage vessel (1) has a central axis (11) and the central axis (11) is a longitudinal axis of the storage vessel (1) and/or perpendicular to a cross-sectional area of the at least one inlet (9), wherein the shaped body (3) covers at least 85% of an inner volume (13) of the storage vessel (1) and the shaped body (3) comprises an opening (19) in an axial direction (17), axial referring to the central axis (11) of the storage vessel (1), wherein the opening (19) extends from a first end (21) of the shaped body (3) to an opposing second end (23) of the shaped body (3) and wherein the storage vessel (1) comprises exactly one shaped body (3), which is formed in one piece. The invention is further related to a shaped body and use of the shaped body.
Abstract:
A process for preparing 2,6-dimethyl-5-heptenal, comprising oxidizing citral of which more than 50% are present as geranial with hydrogen peroxide in the presence of a catalyst comprising a Baeyer-Villiger oxidation catalyst, preferably a tin-containing molecular sieve.