Patent application number | Description | Published |
20090275789 | Treatment Of Small Pore Molecular Sieves And Their Use In The Conversion Of Oxygenates To Olefins - A method is disclosed of treating a porous crystalline molecular sieve having a pore size less than or equal to about 5 Angstroms to decrease its coke selectivity in oxygenate to olefin conversion reactions. The method comprises contacting the molecular sieve with an acid having a kinetic diameter greater than or equal to that of acetic acid. | 11-05-2009 |
20100022723 | Synthesis Of Chabazite-Containing Molecular Sieves And Their Use In The Conversion Of Oxygenates To Olefins - In a method of synthesizing a mostly CHA-type silicoaluminophosphate sieve, a reaction mixture comprises sources of water, silicon, aluminum, phosphorus, and a template. In one aspect, when the reaction mixture Si/Al | 01-28-2010 |
20100022729 | Synthesis Of Chabazite-Containing Molecular Sieves And Their Use In The Conversion Of Oxygenates To Olefins - In a method of synthesizing a silicoaluminophosphate molecular sieve having 90%+CHA framework type character, a reaction mixture is prepared comprising first combining a reactive source of aluminum with a reactive source of phosphorus to form a primary mixture that is aged. A reactive source of silicon and a template for directing the formation of the molecular sieve can then be added to form a synthesis mixture. Crystallization is then induced in the synthesis mixture. Advantageously, (i) the source of silicon comprises an organosilicate, (ii) the source of phosphorus optionally comprises an organophosphate, and (iii) the crystallized silicoaluminophosphate molecular sieve has a crystal size distribution such that its average crystal size is not greater than 5 μm. The molecular sieve can then preferably be used in a hydrocarbon (oxygenates-to-olefins) conversion process. | 01-28-2010 |
20100179363 | Oxygenate Conversion Catalyst System And Processes For Making And Using Same - The invention includes a method for impregnating a molecular sieve primary catalyst with an aromatic co-catalyst, the method comprising contacting the small pore molecular sieve primary catalyst having a porous framework structure with a combination of from at least 50 wt % to about 99.9 wt % of an aromatic co-catalyst and from about 0.1 wt % to less than 50 wt % of a polar impregnation agent containing one or more heteroatoms selected from the group consisting of nitrogen, oxygen, sulfur, phosphorus, and boron, under conditions sufficient to impregnate the porous framework structure of the primary catalyst with the aromatic co-catalyst (and optionally also with the polar impregnation agent), thus forming an integrated catalyst system. Methods for converting oxygenates to olefins using said integrated catalyst system are also described herein. | 07-15-2010 |
20100331597 | Catalyst And Once-Through Reactor-Regenerator Process For Oxygenate To Olefins Production - 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. | 12-30-2010 |
20110054128 | Controlling Prime Olefin Ratio In An Oxygenates-To-Olefins Reaction - Disclosed herein is a method of controlling production of olefins in an oxygenates-to-olefins reaction by combining in a reactor methanol and a molecular sieve, a AlPO or SAPO in certain embodiments, under conditions to produce at least ethylene and propylene having a first ethylene/propylene ratio; adding to the reactor a first amount of a C | 03-03-2011 |
20120157741 | Synthesis of Silicoaluminophosphate Having Lev Framework-Type - A process for producing a silicoaluminophosphate molecular sieve having the LEV framework-type employs at least one source of triethylmethylammonium, R | 06-21-2012 |
20120202954 | Synthesis of Chabazite-Containing Molecular Sieves and Their Use in the Conversion of Oxygenates to Olefins - In a method of synthesizing a silicoaluminophosphate molecular sieve having 90%+CHA framework type character, a reaction mixture is prepared comprising first combining a reactive source of aluminum with a reactive source of phosphorus to form a primary mixture that is aged. A reactive source of silicon and a template for directing the formation of the molecular sieve can then be added to form a synthesis mixture. Crystallization is then induced in the synthesis mixture. Advantageously, (i) the source of silicon comprises an organosilicate, (ii) the source of phosphorus optionally comprises an organophosphate, and (iii) the crystallized silicoaluminophosphate molecular sieve has a crystal size distribution such that its average crystal size is not greater than 5 μm. The molecular sieve can then preferably be used in a hydrocarbon (oxygenates-to-olefins) conversion process. | 08-09-2012 |
20130123557 | PROCESS FOR PRODUCING PHOSPHORUS MODIFIED ZEOLITE CATALYSTS - In a process for producing a phosphorus-modified zeolite catalyst, zeolite crystals can be formed into a shaped catalyst body either in the absence of a separate inorganic oxide binder or in the presence of a separate inorganic oxide binder that is substantially free of aluminum. After converting the zeolite crystals to the hydrogen form and removing any organic directing agent employed in the synthesis of the zeolite crystals, the shaped catalyst body can be treated with an aqueous solution of a phosphorus compound, and the treated catalyst body can be heated to remove the water and to convert the phosphorus compound to an oxide form. | 05-16-2013 |