摘要:
The present invention relates to an organotemplate-free synthetic process for the production of a zeolitic material comprising YO2 and X2O3, wherein said process comprises the steps of (1) preparing a mixture comprising seed crystals, 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 comprising YO2 and X2O3 as a crystallization product; wherein Y is a tetravalent element, and X is a trivalent element, and wherein at least a portion of the mother liquor obtained in step (2) is recycled to step (1) as a source for YO2, optionally after concentration of the mother liquor.
摘要翻译:本发明涉及一种用于生产包含YO 2和X 2 O 3的沸石材料的无有机模板合成方法,其中所述方法包括以下步骤:(1)制备包含晶种的混合物,一种或多种YO2源,一种或多种 X2O3和一种或多种溶剂的来源; (2)使步骤(1)中获得的混合物结晶,得到包含YO 2和X 2 O 3作为结晶产物的沸石材料; 其中Y是四价元素,X是三价元素,并且其中步骤(2)中获得的至少一部分母液作为YO2源再循环到步骤(1),任选地在母液浓缩之后 。
摘要:
A process for the preparation of zeolites having CHA framework structure and a composition comprising the molar ratio (n Si02):X203, 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 X203, wherein X is selected from Al, B, Ga, and a mixture of two or more, and at least one source for Si02, 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 O2):X2O3) where n is in the range of 10 to 50.
摘要翻译: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,所述方法包括(i)制备水性 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,至少一种除四甲基氢氧化铵以外的有机结构导向剂(SDA) (TMAOH)作为CHA结构的模板,和四甲基氢氧化铵(TMAOH),其中SDA或其混合物的使用量使得(i)中的水溶液的SDA:TMAOH摩尔比为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 O 2):X 2 O 3)的铜,其中n在10至50的范围内。
摘要:
Aspects of the present invention relate to shaped bodies of compositions comprising a porous aromatic covalent framework polymer, wherein the polymer comprises at least one monomer unit, the at least one monomer unit comprising at least one aromatic ring and the at least one monomer unit having at least three binding sites to adjacent monomer units in the polymer and a core, wherein the at least three binding sites are located on at least one atom of the core and wherein the at least one atom is free of covalent bonds to hydrogen; and at least one binder additive. Other aspects of the invention relate to methods for the preparation of said shaped bodies and their uses.
摘要:
Methods for ad-hoc trust establishment using visual verification are described. In a first embodiment, a visual representation of a shared data is generated on two or more devices and the visual representations generated can be visually compared by a user. This method can be used to verify that the correct devices are involved in a negotiation, when pre-existing trust relationships do not exist between the devices. The visual representation may, for example, comprise a picture with a number of different elements, each representing a part of the shared data. In another embodiment, a method of secure key exchange is described in which, before sharing the keys, the parties exchange information which encapsulates the key. This information can be used subsequently to check that a party has not changed the key that they are using and prevents a man in the middle attack.
摘要:
Processes suitable for purifying aromatic-containing feed streams, and processes using such purified streams are described, wherein the purification processes comprise: (a) providing a process feedstream comprising an aromatic component; and (b) bringing the process feedstream into contact with a first zeolite and a second zeolite; wherein the first zeolite has a mean pore size of 0.3 to 0.5 nm, and wherein the second zeolite has a mean pore size of 0.6 to 0.8 nm.
摘要:
The present invention relates to a process for the preparation of a zeolitic material having a structure comprising YO2 and optionally comprising X2O3, preferably comprising YO2 and X2O3, wherein said process comprises the steps of (1) providing a mixture comprising one or more ammonium compounds of which the ammonium cation has the formula (I): [R1R2NR3R4]+ (I) and further comprising one or more sources for YO2 and one or more sources for X2O3; (2) crystallizing the mixture provided in (1); wherein Y is a tetravalent element, and X is a trivalent element, and wherein in formula (I) R1 and R2 are independently from one another derivatized or underivatized methyl, and R3 and R4 are independently from one another derivatized or underivatized (C3-C5)alkyl, and wherein the molar ratio of ammonium cation having the formula (I) to Y in the mixture provided in step (1) and crystallized in step (2) is equal to or greater than 0.25.
摘要翻译:本发明涉及一种制备具有包含YO 2和任选地包含X 2 O 3,优选包含YO 2和X 2 O 3的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铵化合物 其中铵阳离子具有式(I):[R 1 R 2 NR 3 R 4] +(I),并且还包含一种或多种YO源和一种或多种X 2 O 3源; (2)使(1)中提供的混合物结晶; 其中Y是四价元素,X是三价元素,并且其中在式(I)中,R 1和R 2彼此独立地是衍生的或未衍生的甲基,并且R 3和R 4彼此独立地是衍生的或未衍生的(C 3 -C 5 )烷基,并且其中在步骤(1)中提供并在步骤(2)中结晶的混合物中具有式(I)的铵阳离子与Y的摩尔比等于或大于0.25。
摘要:
Described is a process for preparing a porous metal-organic framework comprising at least one at least bidentate organic compound coordinated to at least one metal ion, where the at least one metal ion is a zinc ion and the at least one at least bidentate organic compound is based on 2-methylimidazole, which comprises the steps (a) addition of a first water-based solution comprising zinc ions to a second water-based solution comprising 2-methylimidazole, with a suspension being formed after addition of the second solution; (b) addition of a third solution comprising a strong base to the suspension formed in step (a).
摘要:
Zeolite material of the pentasil type has an alkali metal and alkaline earth metal content of not more than 100 ppm and a molar ratio of Si to Al of from 250 to 1500, at least 90% of the primary particles of the zeolite material being spherical and 95% by weight of the spherical primary particles having a diameter of less than or equal to 1 μm.
摘要:
The present invention relates to a process for producing a carbon-comprising composite, wherein a porous metal-organic framework comprising at least one at least bidentate organic compound coordinated to at least one metal ion is pyrolyzed under a protective gas atmosphere and the at least one at least bidentate organic compound is nitrogen-free. The invention further relates to composites which can be obtained in this way and sulfur electrodes comprising these and also their uses.
摘要:
The present invention relates to a biodegradable material in the form of a foil or a film, where the material comprises a polymer comprising at least one porous metal-organic framework and the at least one porous metal-organic framework comprises at least one at least bidentate organic compound coordinated to at least one metal ion. The invention further relates to food packaging comprising such a material and also its use for the packaging of foods and the use of a porous metal-organic framework for the absorption of ethene in food packaging.