Patent application number | Description | Published |
20080269436 | Molecular sieve catalyst composition, its making and use in conversion processes - The invention relates to a molecular sieve catalyst composition, to a method of making or forming the molecular sieve catalyst composition, and to a conversion process using the catalyst composition. In particular, the invention is directed to making a formulated molecular sieve catalyst composition from a slurry of formulation composition of a synthesized molecular sieve that has not been fully dried, a binder and an optional matrix material. In a more preferred embodiment, the weight ratio of the binder to the molecular sieve and/or the solid content of the slurry is controlled to provide an improved attrition resistant catalyst composition, particularly useful in a conversion process for producing olefin(s), preferably ethylene and/or propylene, from a feedstock, preferably an oxygenate containing feedstock. | 10-30-2008 |
20100022721 | 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, the inorganic phosphorus and silicon sources are first combined to form a primary mixture that is aged. Then, the aluminum source is added, followed optionally by any organic phosphorus source, and then the template, to form the synthesis mixture. After heating at <10° C./hr to induce crystallization, in this aspect, both the crystallized sieve has an average crystal size ≦1.5 μm and/or is recovered in a yield of ≧10.0 wt %. In another aspect, when the synthesis mixture Si/Al | 01-28-2010 |
20100022722 | 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 sources of water, silicon, aluminum, and phosphorus, as well as an organic template. In one aspect, the reaction mixture is heated at more than 10° C./hour to a crystallization temperature and is retained at the crystallization temperature or within the crystallization temperature range for a crystallization time from 16 hours to 350 hours to produce the silicoaluminophosphate molecular sieve. In another aspect, the reaction mixture is heated at less than 10° C./hour to a crystallization temperature from about 150° C. to about 225° C. and is then retained there for less than 10 hours to produce the silicoaluminophosphate molecular sieve. The molecular sieve can then be recovered from the reaction mixture and, preferably, used in a hydrocarbon conversion process, such as oxygenates to olefins. | 01-28-2010 |
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 |
20100028679 | Crystalline Intergrowth Material, Its Synthesis And Its Use In The Conversion Of Oxygenates To Olefins - A silicoaluminophosphate molecular sieve is disclosed that comprises first and second intergrown phases of a CHA framework type and an AEI framework type, wherein said first intergrown phase has an AEI/CHA ratio of from about 5/95 to about 40/60 as determined by DIFFaX analysis, the second intergrown phase has an AEI/CHA ratio of about 30/70 to about as determined by DIFFaX analysis and said molecular sieve has a silica to alumina molar ratio (Si/Al | 02-04-2010 |
20100087610 | Method Of Preparing And Using A Molecular Sieve - A crystalline microporous silicoaluminophosphate (SAPO) molecular sieve is prepared by: (a) providing a reaction mixture having a molar composition within the following ranges: P:Al from 0.75 to 1.25, Si:Al | 04-08-2010 |
20110124937 | Method of Synthesizing Silicoaluminophosphate Molecular Sieves - In a method of synthesizing a silicoaluminophosphate molecular sieve, a synthesis mixture is prepared by combining a source of phosphorus and at least one organic directing agent; and then introducing a source of aluminum into the combination of the phosphorus source and organic directing agent, wherein the temperature of the combination is less than or equal to 50° C. when addition of the source of aluminum begins. After addition of a source of silicon, the synthesis mixture is heated to a crystallization temperature of between about 100° C. and about 300° C. and the molecular sieve is recovered. | 05-26-2011 |
20110152478 | Method of Preparing A Molecular Sieve and Its Use In The Conversion Of Oxygenates To Olefins - A method of preparing a silicoaluminophosphate molecular sieve which comprises the steps of combining a source of silica, a source of phosphorous, a source of alumina and water to form a primary mixture; adding a structure directing agent to said mixture and optional seeds to form a synthesis mixture. The synthesis mixture is synthesized by heating the mixture to a crystallization temperature to form the sieve. The molar ratio of the structure directing agent relative to the source of alumina may vary between 1.3 and 1.9 and the ratio of water to the source of alumina may vary between 20 to 34. | 06-23-2011 |
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 |
20120264987 | Process for Manufacturing Molecular Sieve of MFS Framework Type and Its Use - A crystalline molecular sieve of MFS framework type manufactured by the method disclosed herein. A hydrocarbon conversion process using the crystalline molecular sieve is disclosed. | 10-18-2012 |
20120316312 | 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 sources of water, silicon, aluminum, and phosphorus, as well as an organic template. In one aspect, the reaction mixture is heated at more than 10° C./hour to a crystallization temperature and is retained at the crystallization temperature or within the crystallization temperature range for a crystallization time from 16 hours to 350 hours to produce the silicoaluminophosphate molecular sieve. In another aspect, the reaction mixture is heated at less than 10° C./hour to a crystallization temperature from about 150° C. to about 225° C. and is then retained there for less than 10 hours to produce the silicoaluminophosphate molecular sieve. The molecular sieve can then be recovered from the reaction mixture and, preferably, used in a hydrocarbon conversion process, such as oxygenates to olefins. | 12-13-2012 |