摘要:
A method for the post synthesis modification of molecular sieves with organometallic reagents. The method may be used for large pore molecular sieves and small pore molecular sieves, such as SAPO-34. SAPO-34 is a useful catalyst for the conversion of oxygenates, such as methanol, to olefins. Post synthesis organometallic modification improves catalyst performance and increases light olefin selectivity in the conversion of methanol to olefins.
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 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:
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:
This invention is directed to a process for producing olefin product from an oxygenate feed that includes dimethyl ether (DME). The process uses an olefin forming catalyst that contains a porous crystalline material, preferably a porous crystalline aluminosilicate molecular sieve material. The process produces high quantities of light olefin (i.e., ethylene, propylene, and mixtures thereof).
摘要:
The present invention relates to new methods of making crystalline materials, as well as to new crystalline materials obtainable by such methods, and their use in hydrocarbon conversion processes. In one of its aspects, the invention relates to a method for preparing a crystalline molecular sieve comprising oxides of one or more tetravalent element(s), optionally one or more trivalent element(s), and optionally one or more pentavalent element(s), said method comprising submitting to crystallization conditions one or more sources of said oxides in the presence of at least one organic templating agent R of formula C1C2R1R2N+ A− (I), in which C1 and C2 each independently represent a substituted or unsubstituted cyclohexyl or cyclopentyl group, R1 and R2 each independently represent a methyl group, an ethyl group or a propyl group, or R1 and R2 together with the nitrogen atom they are connected to form a ring containing 5 or 6 atoms, and A represents hydroxyl, fluorine, chlorine, bromine or iodine.
摘要翻译:本发明涉及制备结晶材料的新方法以及可通过这些方法获得的新结晶材料及其在烃转化方法中的用途。 在其一个方面,本发明涉及一种制备结晶分子筛的方法,所述结晶分子筛包含一种或多种四价元素的氧化物,任选的一种或多种三价元素,以及任选的一种或多种五价元素, 所述方法包括在至少一种式C 1 C 2 R 1 R 2 N + A(I)的有机模板剂R的存在下将所述氧化物的一种或多种来源结晶,其中C 1和C 2各自独立地表示取代或未取代的环己基或环戊基 基团,R 1和R 2各自独立地表示甲基,乙基或丙基,或者R 1和R 2与它们连接的氮原子一起形成含有5或6个原子的环,A表示羟基,氟,氯 ,溴或碘。
摘要:
Disclosed herein is a method of converting oxygenates to olefins comprising contacting an oxygenate stream with an acidic high silica chabazite catalyst in one or more oxygenate-to-olefins reactors; circulating greater than from 80% of the catalyst to one or more catalyst regenerators to form regenerated catalyst; circulating the regenerated catalyst, preferably the same amount of regenerated catalyst, back to the oxygenate-to-olefins reactor to contact an oxygenate stream; and isolating a stream of olefins from the one or more oxygenate-to-olefins reactors.
摘要:
The present invention relates to processes for converting a mixed alcohol feedstock, including methanol and a higher alcohol, to olefins such as ethylene, propylene, and the like. In addition, the olefins produced by the oxygenate-to-olefin reaction system can then be used as monomers for a polymerization of olefin-containing polymers and/or oligomers.