Abstract: Methods are provided for synthesizing ZSM-58 crystals with an improved morphology and/or an improved size distribution. By controlling the conditions during synthesis of the ZSM-58 crystals, crystals of a useful size with a narrow size distribution can be generated. Additionally, by controlling the ratio of water content to silica content in the synthesis mixture, it has unexpectedly been found that ZSM-58 crystals can be formed with an improved morphology. The improved morphology can result in ZSM-58 crystals with a more uniform size across the various dimensions of the crystal, which allows for more uniform diffusion within the crystal. This is in contrast to conventionally synthesized crystals, where the size of the crystal can vary along different axes of the crystals.

Abstract: Methods are provided for synthesizing ZSM-58 crystals with an improved morphology and/or an improved size distribution. By controlling the conditions during synthesis of the ZSM-58 crystals, crystals of a useful size with a narrow size distribution can be generated. Additionally, by controlling the ratio of water content to silica content in the synthesis mixture, it has unexpectedly been found that ZSM-58 crystals can be formed with an improved morphology. The improved morphology can result in ZSM-58 crystals with a more uniform size across the various dimensions of the crystal, which allows for more uniform diffusion within the crystal. This is in contrast to conventionally synthesized crystals, where the size of the crystal can vary along different axes of the crystals.

Abstract: 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.

Abstract: This disclosure relates to a crystalline MCM-22 family molecular sieve composition having, in its as-synthesized form, an X-ray diffraction pattern including a peak at d-spacing maximum of 12.33±0.23 Angstroms, a distinguishable peak at a d-spacing maximum between 12.57 to about 14.17 Angstroms and a non-discrete peak at a d-spacing maximum between 8.8 to 11. Angstroms, wherein the peak intensity of the d-spacing maximum between 12.57 to about 14.17 Angstroms is less than 90% of the peak intensity of the d-spacing maximum at 12.33±0.23 Angstroms. This disclosure also relates to methods of making the crystalline MCM-22 family molecular sieve composition.

Abstract: 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 a

Abstract: A process for manufacturing a metalloaluminophosphate molecular sieve, the process comprising the steps of: (a) combining at least one silicon source, at least one metal source, at least one structure-directing-agent (R), at least one phosphorus source, and at least one aluminum source to form a mixture having a molar composition according to formula: (n)Si:Al2:(m)P:(x)R:(y)H2O:(z)M wherein n is in the range of from about 0.005 to about 0.6, m is in the range of from about 1.2 to about 2.4, x is in the range of from about 0.5 to about 2, y is in the range of from about 10 to about 60, and z is in the range of from about 0.001 to 1; and (b) submitting the mixture to crystallization conditions to form the metalloaluminophosphate molecular sieve, wherein the metalloaluminophosphate molecular sieve has an X-ray diffraction pattern having a FWHM greater than 0.10 degree (2?) and an AEI/CHA framework type ratio of from about 0/100 to about 40/60 as determined by DIFFaX analysis.

Abstract: A process for manufacturing a silicoaluminophosphate molecular sieve comprising at least one intergrown phase of AEI and CHA framework types, the process comprising the steps of (a) combining at least one silicon source, at least one phosphorus source, at least one aluminum source, and at least one structure-directing-agent (R) to form a mixture; and (b) treating the mixture at crystallization conditions sufficient to form the silicoaluminophosphate molecular sieve, wherein the mixture prepared in step (a) has a molar composition of: (n)SiO2/Al2O3/(m)P2O5/(x)R/(y)H2O wherein n ranges from about 0.005 to about 0.6, m ranges from about 0.6 to about 1.2, x ranges from about 0.5 to about 0.99, and y ranges from about 10 to about 40.

Abstract: A process for manufacturing a silicoaluminophosphate molecular sieve, the process comprising the steps of: (a) dissolving a silicon source into in a template at conditions sufficient to form a solution having a silicon concentration of at least 0.05 wt. %; (b) adding at least one aluminium source and at least one phosphorus source to at least a portion of the solution of step (a) to form a synthesis mixture, wherein at least the major portion of the aluminum source and phosphorus source are added to the solution after the solution has reached a dissolved silicon concentration of at least 0.03 wt.

Abstract: In a method of synthesizing a silicoaluminophosphate molecular sieve comprising at least one intergrown phase of an AEI framework type material and a CHA framework type material, a first synthesis mixture is prepared comprising water and sources of phosphorus, aluminum and optionally silicon. The first synthesis mixture is then heated under agitation to a first temperature to form an intermediate product mixture containing a silicoaluminophosphate or aluminophosphate precursor material. The intermediate product mixture is then cooled and stored at a second temperature lower than the first temperature, whereafter a second synthesis mixture is prepared comprising at least part of the intermediate product mixture and at least one organic directing agent. The second synthesis mixture is heated to a third temperature higher than the second temperature to convert at least part of the precursor material into the desired molecular sieve and the molecular sieve is recovered.

Abstract: Molecular sieve catalysts are combined to provide a catalyst mixture having a beneficial combination of the activities and selectivities of the individual molecular sieves. The molecular sieve catalysts can be formulated or unformulated silicoaluminophosphate molecular sieves, silicoaluminate molecular sieves, and/or metalloaluminophosphate molecular sieves.

Abstract: In a method of synthesizing a silicoaluminophosphate molecular sieve comprising a CHA framework type material, an AEI framework type material, or a material comprising at least one intergrown phase of an AEI framework type and a CHA framework type, the amount of alkali metal present in said synthesis mixture is controlled so as to reduce the crystal size of the molecular sieve and/or to increase the AEI character of the intergrown phase.

Abstract: In a method of synthesizing a silicoaluminophosphate molecular sieve comprising at least one intergrown phase of an AEI framework type material and a CHA framework type material, a first synthesis mixture is prepared comprising water and sources of phosphorus, aluminum and optionally silicon. The first synthesis mixture is then heated under agitation to a first temperature to form an intermediate product mixture containing a silicoaluminophosphate or aluminophosphate precursor material. The intermediate product mixture is then cooled and stored at a second temperature lower than the first temperature, whereafter a second synthesis mixture is prepared comprising at least part of the intermediate product mixture and at least one organic directing agent. The second synthesis mixture is heated to a third temperature higher than the second temperature to convert at least part of the precursor material into the desired molecular sieve and the molecular sieve is recovered.

Abstract: Small particle size silicoaluminophosphate molecular sieves are obtained by providing the source of the silicon in the form of a basic organic solution.

Abstract: 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 cooling the combination of the phosphorus source and organic directing agent to a temperature of less than or equal to 50° C., prior to introducing a source of aluminum into the combination. 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.

Abstract: 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.

Abstract: A catalyst composition for use in the conversion of oxygenates to olefins comprises a first molecular sieve comprising a CHA framework type material and a second molecular sieve comprising an AFI framework type material, wherein said second molecular sieve is present in an amount up to 0.75% by weight of said first molecular sieve.

Abstract: A catalyst composition for use in the conversion of oxygenates to olefins comprises a first molecular sieve comprising a CHA framework type material and a second molecular sieve comprising an AFI framework type material, wherein said second molecular sieve is present in an amount up to 0.75% by weight of said first molecular sieve.

Abstract: A catalyst composition for use in the conversion of oxygenates to olefins comprises a first crystalline silicoaluminophosphate molecular sieve comprising at least one intergrown form of an AEI structure type material and a CHA structure type material, and a second crystalline material different from said first molecular sieve and resulting from dehydration of an aluminophosphate or silicoaluminophosphate hydrate.

Abstract: There is provided a coated zeolite catalyst in which the accessibility of the acid sites on the external surfaces of the zeolite is controlled and a process for converting hydrocarbons utilizing the coated zeolite catalyst. The zeolite catalyst comprises core crystals of a first zeolite and a discontinuous layer of smaller size second crystals of a second zeolite which cover at least a portion of the external surface of the first crystals The coated zeolite catalyst finds particular application in hydrocarbon conversion processes where catalyst activity in combination with zeolite structure are important for reaction selectivity, e.g., catalytic cracking, alkylation, disproportional of toluene, isomerization, and transalkylation reactions.

Abstract: 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 a conversion process for producing olefin(s), preferably ethylene and/or propylene, from a feedstock, preferably an oxygenate containing feedstock in the presence of a molecular sieve having been synthesized in the presence of a flocculant.