Abstract:
A zeolitic material having the ITH framework structure type.A process for the preparation of a zeolitic material having the ITH framework structure type, the process comprising : (1) preparing a mixture comprising one or more specific organotemplates as structure direct-ing agents, one or more sources of YO2, optionally one or more sources of X2O3, seed crystals, and a solvent system, wherein Y is tetravalent element and X is a trivalent ele-ment,(2) heating the mixture obtained in (1) for crystallizing a zeolitic material having the ITH framework structure type comprising YO2 and optionally X2O3 in its framework structure; wherein the one or more organotemplates comprise a specific polymeric cation.
Abstract:
A process for preparing a zeolitic material having a zeolitic framework structure which exhibits a molar ratio (aAl 2 O 3 ) : SiO 2 or a crystalline precursor thereof, comprising (i) pre-paring a mixture comprising H 2 O, one or more compounds comprising Si from which SiO 2 in the zeolitic framework structure is formed, said one or more compounds compris-ing a silica gel exhibiting a molar ratio (c H 2 O) : SiO 2 and optionally one or more com-pounds comprising Al from which Al 2 O 3 in the zeolitic framework structure is formed; (ii) subjecting the mixture obtained in (i) to crystallization at a crystallization temperature in the range of from 110 to 350 ℃, preferably in the range of from 190 to 350 ℃, and for a crystallization time in the range of from 0.1 to 48 h.
Abstract translation:制备具有沸石骨架结构的沸石材料的方法,所述沸石骨架结构表现出摩尔比(aAl 2 O 3:SiO 2):SiO 2: 其包含(i)预混合包含H 2 O,一种或多种包含Si的混合物,其中SiO 2在 形成沸石骨架结构,所述一种或多种化合物包含表现出摩尔比(c H 2 O):SiO 2 2和任选地一种或多种 包含形成沸石骨架结构中的Al 2 O 3的Al的化合物; (ii)使(i)中得到的混合物在110-350℃,优选190-350℃的结晶温度下结晶,结晶时间范围为0.1-1.0 48小时。 p>
Abstract:
The present invention relates to a zeolitic material having the IWR type framework structure, wherein the zeolitic material comprises YO 2 and X 2 O 3 in its framework structure, wherein Y is a tetravalent element and X is a trivalent element, and wherein the framework structure of the zeolitic material comprises less than 5 weight-%weight-% of Ge calculated as GeO 2 and based on 100 weight-%weight-%of YO 2 contained in the framework structure, and less than 5 weight-%weight-% of B calculated as B 2 O 3 and based on 100 weight-%weight-% of X 2 O 3 contained in the framework structure. Further, the present invention relates to a process for preparing a zeo-litic material having the IWR type framework structure, wherein the zeolitic material comprises YO 2 and X 2 O 3 in its framework structure, wherein Y is a tetravalent element and X is a trivalent element.
Abstract:
Provided is a process for preparing a zeolitic material comprising YO 2 in its framework structure, wherein Y stands for a tetravalent element. The process comprises the steps of: (1) providing a mixture comprising one or more sources for YO 2 , one or more fluoride containing compounds, and one or more structure directing agents; (2) crystallizing the mixture obtained in step (1) for obtaining the zeolitic material; wherein the mixture provided in step (1) and crystallized in step (2) contains 35 wt.% or less of H 2 O based on 100 wt.% of YO 2 . Also provided are a zeolitic material obtained according to the process, and a zeolitic material per se comprising SiO 2 in its framework structure, wherein the ratio of the total integration value of the peaks associated to Q3 signals to the total integration value of the peaks associated to Q4 signals is in the range of from 0:100 to 20:80 in the 29 Si MAS NMR spectrum of the zeolitic material. Further provided is use of the aforementioned zeolitic materials.
Abstract:
The present invention relates to a preparation method for zeolite molecular sieves. The object of the present invention is to provide a method for synthesizing zeolite molecular sieves by means of solid-state reactions without the usage of organic templates. The method comprises following steps: grinding and mixing the solid raw materials comprising the silicon source, the aluminum source and the alkali source, transferring the obtained mixture into an autoclave, conducting the crystallization for a period of 5 hours – 20 days at a temperature of 50-200 ℃. After filtering and drying the crystallized products, molecular sieves in a powder form can be obtained. By using the method of the present invention, different molecular sieves, including ZSM-5 zeolite, Beta zeolite, FAU zeolite, MOR zeolite, LTA zeolite and GIS zeolite, with a high crystallinity and an adjustable Si/Al ratio within a certain range can be obtained. The obtained products exhibit a high crystallinity and a high purity, and the method of the present invention does not require the use of organic templates and solvents, which avoids unnecessary consumptions during the production, simplifies the synthetic process, and also increases the yield from the autoclave reactor.
Abstract:
Provided is a process for preparing a zeolitic material comprising YO2 in its framework structure, wherein Y stands for a tetravalent element. The process comprises the steps of: (1) providing a mixture comprising one or more sources for YO2, one or more fluoride containing compounds, and one or more structure directing agents; (2) crystallizing the mixture obtained in step (1) for obtaining the zeolitic material; wherein the mixture provided in step (1) and crystallized in step (2) contains 35 wt.% or less of H2O based on 100 wt.% of YO2. Also provided are a zeolitic material obtained according to the process, and a zeolitic material per se comprising SiO2 in its framework structure, wherein the ratio of the total integration value of the peaks associated to Q3 signals to the total integration value of the peaks associated to Q4 signals is in the range of from 0:100 to 20:80 in the 29Si MAS NMR spectrum of the zeolitic material. Further provided is use of the aforementioned zeolitic materials.
Abstract translation:提供了一种制备在其骨架结构中包含YO 2的沸石材料的方法,其中Y代表四价元素。 该方法包括以下步骤:(1)提供包含一种或多种YO 2来源,一种或多种含氟化合物和一种或多种结构导向剂的混合物; (2)使步骤(1)中获得的混合物结晶以获得沸石材料; 其中步骤(1)中提供并且在步骤(2)中结晶的混合物基于100重量%的YO 2含有35重量%或更少的H 2 O. 还提供了根据该方法获得的沸石材料和其骨架结构中包含SiO 2的沸石材料本身,其中与Q 3信号相关的峰的总积分值与相关峰的总积分值之比 Q4信号在沸石材料的29 Si MAS NMR谱图中在0:100至20:80的范围内。 进一步提供了上述沸石材料的用途。