Abstract:
A process for the preparation of a zeolitic material comprising YO 2 and X 2 O 3 in its framework structure is provided, wherein Y stands for a tetravalent element and X stands for a trivalent element. The process comprises steps of (1) preparing a mixture comprising one or more structure directing agents, seed crystals, and a first zeolitic material comprising YO 2 and X 2 O 3 in its framework structure, wherein the first zeolitic material has a framework structure selected from the group consisting of FAU-, GIS-, MOR-, and LTA-type framework structures, including mixtures of two or more thereof; (2) heating the mixture obtained in (1) for obtaining a second zeolitic material comprising YO 2 and X 2 O 3 in its framework structure, wherein the second zeolitic material obtained in (2) has a different type of framework structure than the first zeolitic material contained in the mixture obtained in (1); wherein the mixture prepared in (1) and heated in (2) contains 1000 wt.% or less of H 2 O based on 100 wt.% of YO 2 in the framework structure of the first zeolitic material. As well as a zeolitic material obtainable and/or obtained according to the process and its use are provided.
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 comprising SiO 2 and Ga 2 O 3 in its framework structure, wherein the zeolitic material comprises one or more metal cations M selected from the group consisting of Sr, Zr, Cr, Mg, Mo, Fe, Co, Ni, Cu, Zn, Ru, Rh, Pd, Ag, Os, Ir, Pt, Au, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Y, Sc, and mixtures of two or more thereof, wherein the one or more metal cations M are located at the ion-exchange sites of the framework structure of the zeolitic material, wherein the zeolitic material contains 1 wt.-% or less of trivalent elements, calculated as the respective element, other than Ga and other than any trivalent met-al cations among the one or more metal cations M, based on 100 wt. % of Si, calculated as SiO 2 , in the zeolitic material, and furthermore to a method for its production as well as to a process for the treatment of NO x using the inventive zeolitic materials and to an apparatus for the treatment of a gas stream containing NO x , the apparatus containing the inventive zeolitic materials, and finally to the use of the zeolitic materials according to the present invention.
Abstract:
The present invention relates to a process for preparing a zeolitic material having a framework type FER and having a framework structure comprising silicon, aluminum, and oxygen, said process comprising (i) preparing an aqueous synthesis mixture comprising water; a zeolitic material having a framework type other than FER and having a framework structure comprising silicon, aluminum, and oxygen; a source of silicon other than the zeolitic material having a framework type other than FER; an organic structure directing agent comprising piperidine; a source of an alkali metal; and a source of a base; (ii) subjecting the aqueous synthesis mixture prepared according to (i) to hydrothermal synthesis conditions comprising heating the synthesis mixture to a temperature in the range of from 140 to 190 °C and keeping the synthesis mixture at a temperature in this range under autogenous pressure, obtaining a mother liquor comprising a solid material which comprises the zeolitic material having a framework type FER.
Abstract:
A process for preparing a zeolitic material having a framework structure type RTH and having a framework structure comprising a tetravalent element Y, a trivalent element X and oxygen, said process comprising (i) preparing a synthesis mixture comprising a zeolitic material having a framework structure type FAU and having a framework structure comprising the tetravalent el-ement Y, the trivalent element X and oxygen, water, a source of a base, and an RTH framework structure type directing agent comprising a N-methyl-2, 6-dimethylpyridinium cation containing compound; (ii) subjecting the mixture obtained in (i) to hydrothermal crystallization conditions, obtaining the zeolitic material having a framework structure type RTH
Abstract:
The present invention relates to a process for the production of a transition metal containing zeolite comprising expanding a layered silicate with a swelling agent and introducing the transition metal into the interlayer expanded silicate prior to calcination thereof for obtaining the transition metal containing zeolite. The present invention further relates to a zeolite containing transition metal nanoparticles as obtainable or obtained according to the inventive process, as well as to a zeolite containing nanoparticles per se. Finally the present invention relates to the use of a zeolite containing transition metal nanoparticles as obtainable or obtained according to the inventive process, as well as to the use of a zeolite containing nanoparticles per se.
Abstract:
The present invention relates to a molding comprising a zeolitic material, phosphorous, one or more metals M of groups 3, 6, 10 to 14 of the periodic system of the elements, and a binder material. The molding is useful as a catalyst, in particular for preparing aromatic compounds from methanol with selectivity toward p-xylene.
Abstract:
Described are fluid catalytic cracking (FCC) compositions, methods of manufacture and use. FCC catalyst compositions comprise catalytic microspheres containing a zeolite, a non-zeolitic component, and a rare earth component. The microspheres are modified with phosphorus. The FCC catalyst composition can be used to crack hydrocarbon feeds, particularly resid feeds containing high V and Ni, resulting in lower hydrogen and coke yields.
Abstract:
A novel catalyst blend for processing of feedstocks into monoaromatics in a single stage, comprising at least one cracking catalyst, one heterogeneous transition metal catalyst, and optionally at least one hydrogenation catalyst. The process occurs in one-step or single stage with substantially no solvents or external additives, or when the feedstock contains less than 15% oxygen, the process includes additional water or steam to enable sufficient amounts of H 2 being produced in-situ.
Abstract:
A zeolite fluid catalytic cracking catalyst is provided that passivates nickel and vanadium during catalytic cracking. The zeolite fluid catalytic cracking catalyst includes Y-faujasite crystallized in-situ from a metakaolin-containing calcined microsphere. The zeolite fluid catalytic cracking catalyst further includes an alumina- containing matrix obtained by calcination of a dispersible crystalline boehmite and a kaolin contained in the metakaolin-containing calcined microsphere, where the dispersible crystalline boehmite has a crystallite size of less than 500 A. Also provided are a method of reducing contaminant coke and hydrogen yields and a method of catalytic cracking of heavy hydrocarbon feed stocks.