摘要:
A crystalline material has a DDR framework type and, in its calcined, anhydrous form, has a composition involving the molar relationship: (n)X2O3:YO2, wherein X is a trivalent element, Y is a tetravalent element and n is from 0 to less than 0.01 and wherein the crystals of said material have an average diameter less than or equal to 2 microns. The material is synthesized in the presence of an N-ethyltropanium compound as directing agent.
摘要翻译:结晶材料具有DDR框架型,并且以其煅烧的无水形式具有涉及摩尔关系的组成:<?in-line-formula description =“In-line formula”end =“lead”?>(n) X 2 O 3:YO 2,<β在线式描述=“在线式”末端=“尾”→其中X为三价元素,Y为四价元素,n为0至小于0.01,其中 所述材料的晶体具有小于或等于2微米的平均直径。 该物质在N-乙基anium化合物作为引导剂的存在下合成。
摘要:
The synthesis of a crystalline material, in particular, a high silica zeolite, comprising a chabazite-type framework molecular sieve is conducted in the presence of an organic directing agent having the formula: [R1R2R3N—R4]+Q− wherein R1 and R2 are independently selected from hydrocarbyl groups and hydroxy-substituted hydrocarbyl groups having from 1 to 3 carbon atoms, provided that R1 and R2 may be joined to form a nitrogen-containing heterocyclic structure, R3 is an alkyl group having 2 to 4 carbon atoms and R4 is selected from a 4- to 8-membered cycloalkyl group, optionally, substituted by 1 to 3 alkyl groups each having from 1 to 3 carbon atoms; and a 4- to 8-membered heterocyclic group having from 1 to 3 heteroatoms, said heterocyclic group being, optionally, substituted by 1 to 3 alkyl groups each having from 1 to 3 carbon atoms and the or each heteroatom in said heterocyclic group being selected from the group consisting of O, N, and S, or R3 and R4 are hydrocarbyl groups having from 1 to 3 carbon atoms joined to form a nitrogen-containing heterocyclic structure; and Q− is a anion.
摘要:
A crystalline material substantially free of framework phosphorus and comprising a CHA framework type molecular sieve with stacking faults or at least one intergrown phase of a CHA framework type molecular sieve and an AEI framework type molecular sieve, wherein said material, in its calcined, anhydrous form, has a composition involving the molar relationship: (n)X2O3:YO2, wherein X is a trivalent element; Y is a tetravalent element; and n is from 0 to about 0.5. The material exhibits activity and selectivity in the conversion of methanol to lower olefins, especially ethylene and propylene.
摘要:
A crystalline material is described that has an AEI framework type, wherein the material, in its calcined, anhydrous form, has a composition involving the molar relationship: (n)X2O3:YO2, wherein X is a trivalent element, Y is a tetravalent element n is from 0 to less than 0.01. The material is normally synthesized in a halide, typically a fluoride, medium and exhibits activity and selectivity in the conversion of methanol to lower olefins, especially ethylene and propylene.
摘要翻译:描述了具有AEI骨架类型的结晶材料,其中以煅烧的无水形式的材料具有涉及摩尔关系的组成:<?in-line-formula description =“In-line Formulas”end =“lead “?”(n)X 2 O 3:YO 2,<βin-line-formula description =“In-Line Formulas” end =“tail”?>其中X为三价元素,Y为四价元素,n为0至小于0.01。 该材料通常在卤化物(通常为氟化物)介质中合成,并且在甲醇转化为低级烯烃,特别是乙烯和丙烯中表现出活性和选择性。
摘要:
The synthesis of a crystalline material, in particular a high silica zeolite, having a chabazite-type framework is aided by the addition to the synthesis mixture of seeds of an AEI framework-type material. The chabazite-type product has a relatively small crystal size and exhibits activity and selectivity in the conversion of methanol to lower olefins, especially ethylene and propylene.
摘要:
A method is disclosed of synthesizing a crystalline material comprising a CHA framework type molecular sieve and having a composition involving the molar relationship: (n)X2O3:YO2, wherein X is a trivalent element; Y is a tetravalent element; and n is from 0 to less than 0.01. The method comprises preparing a reaction mixture capable of forming said material, said mixture comprising a source of water, a source of an oxide of a tetravalent element Y and optionally a source of an oxide of a trivalent element X, wherein the reaction mixture is substantially free of fluoride ions added as HF; maintaining the reaction mixture under conditions sufficient to form crystals of the crystalline material; and than recovering the crystalline material. The reaction mixture comprises either a specific directing agent for directing the formation of a CHA framework type molecular sieve and/or a H2O:YO2 molar ratio of greater than 20. In one embodiment, the resultant crystalline material is free of stacking faults and/or any intergrown phase with an AEI framework type molecular sieve.
摘要:
A selective hydrogenation catalyst composition comprises a support; a first metal component comprising rhodium; and a second metal component comprising a metal other than rhodium and selected from Groups 1 to 15 of the Periodic Table of Elements, wherein said first and second components are predominantly contained in an outer surface layer of the support having a depth of not more than 1000 microns.
摘要:
A selective hydrogenation catalyst composition comprises a support; a first metal component comprising rhodium; and a second metal component comprising a metal other than rhodium and selected from Groups 1 to 15 of the Periodic Table of Elements, wherein said first and second components are predominantly contained in an outer surface layer of the support having a depth of not more than 1000 microns.
摘要:
A selective hydrogenation catalyst composition comprises a rhodium component present in an amount such that the catalyst composition comprises less than 3.0% of rhodium by weight of the total catalyst composition; and an indium component present in an amount such that the catalyst composition comprises at least 0.3% and less than 5.0% of indium by weight of the total catalyst composition.
摘要:
A selective hydrogenation catalyst composition comprises at least two different metal components selected from Groups 8 to 10 of the Periodic Table of Elements, one of which may be rhodium, and at least one metal component selected from Group 13 of the Periodic Table of Elements, such as indium.