Abstract: Process for the preparation of doped pentasil-type zeolite, which process comprises the steps of: a) preparing an aqueous precursor mixture comprising a silicon source, an aluminum source, doped faujasite seeds, and another type of seeding material, and b) thermally treating the precursor mixture to form a doped pentasil-type zeolite. This process results in doped pentasil-type zeolites in a shorter crystallization time compared to prior art processes.

Abstract: Pure phase, high activity ZSM-48 crystals having a SiO2/Al2O3 ratio of less than about 150/1, substantially free from ZSM-50 and Kenyaite, and fibrous morphology crystals. The crystals may further have a specific cross morphology. A method for making such crystals using heterostructural, zeolite seeds, other than ZSM-48 and ZSM-50 seeds.

Abstract: The invention concerns a crystalline solid, designated IM-10, which has the X ray diffraction diagram given below. Said solid has a chemical composition, expressed as the anhydrous base, in terms of moles of oxides, in accordance with the formula XO2:mYO2:pZ2O3:qR2/nO:sF, in which R represents one or more cation(s) with valency n, X represents one or more tetravalent element(s) other than germanium, Y represents germanium, Z represents at least one trivalent element and F is fluorine.

Abstract: A novel method of forming ZSM-5 comprises reacting calcined kaolin microspheres with silicate and a seed solution used for forming zeolite Y under conditions of pH, temperature, and time to yield ZSM-5 crystals formed in-situ on said calcined kaolin microspheres. The reaction medium does not contain any organic templates or ZSM-5 seeding crystals.

Abstract: There is provided macrostructures of porous inorganic material which can have controlled size, shape, and/or porosity and a process for preparing the macrostructures. The macrostructures comprise a three-dimension network of particles of porous inorganic materials. The process for preparing the macrostructures involves forming an admixture containing a porous organic ion exchanger and a synthesis mixture capable of forming the porous inorganic material and then converting the synthesis mixture to the porous inorganic material. After formation of the composite material, the porous organic ion exchanger can be removed from the composite material to obtain the macrostructures.

Abstract: A microporous crystalline material of a zeolitic nature, that corresponds to the empirical formula x(M1/nXO2):yYO2:zGeO2:(1?z)TO2 wherein x has a value between 0 and 0.2; y has a value between 0 and 0.1; z has a value between 0 and 0.67; being at least one of the z, x and y above zero; M is selected between H+ and inorganic cations with a +n charge; X is at least one chemical element with a +3 oxidation status; Y is at least one chemical element with a +4 oxidation status; and T is at least one chemical element with a +4 oxidation status; and is also characterised by its X-ray diffraction pattern and its microporous properties, and can be employed as a catalyst or oxidating agent in the separation and transformation of organic compounds.

Abstract: A process for the preparation of a composition comprising a pentasil-type zeolite, which process comprises the following steps: a) hydrothermally treating an aqueous slurry comprising an aluminium source, a silicon source, a seeding material, and optionally a divalent metal source, thereby forming a pentasil-type zeolite and at least one other compound, and b) shaping the product of step a). Examples of the at least one other compound are anionic clay, cationic clay, Si—Al cogel, and (pseudo)boehmite.

Abstract: Porous hexagonal, cubic, lamellar, wormhole, or cellular foam aluminosilicates, gallosilicates and titanosilicates derived from protozeolitic seeds or zeolite fragments using an organic porogen directing agent are described. The porous aluminosilicates optionally also can contain zeolite crystals depending upon the aging of the protozeolitic seeds. The silicon and aluminum, gallium or titanium centers in the structures are stable so that the framework of the structure does not collapse when heated in the presence of water or water vapor (steam). The steam stable compositions can be used as catalysts for hydrocarbon conversions, including the fluidized bed catalytic cracking and the hydrocracking of petroleum oils, and other reactions of organic compounds.

Abstract: A novel method of forming ZSM-5 comprises reacting calcined kaolin microspheres with silicate and a seed solution used for forming zeolite Y under conditions of pH, temperature, and time to yield ZSM-5 crystals formed in-situ on said calcined kaolin microspheres. The reaction medium does not contain any organic templates or ZSM-5 seeding crystals.

Abstract: Crystalline molecular sieve particles of a size suitable for use as seeds in molecular sieve manufacture are obtained by washing larger particle sized product to dislodge smaller particles from the larger.

Abstract: The present invention provides an improved process for the preparation of ZSM-5 catalyst of the formula 3.25 Na2O. Al2O3.30SiO2.zH2O where z=15-20 water molecules per unit cell by autoclaving a mixture of a pre-prepared seeding gel comprising a mixture of a alkali metal cation, an alkali hydroxide, and a silica source in water, and further amounts of silica source and an aluminium source in the presence of an organic solvent with water as a co-solvent.

Abstract: A microporous crystalline material of a zeolitic nature that, in a calcinated and anhydrous state, has a chemical composition represented by the formula: x(M1/nXO2):yYO2:zGeO2:(1−z)TO2 wherein x has a value below 0.2, y has a value below 0.1, z has a value below 1, with at least one of x, z and y being above zero; M is H+ or at least an inorganic cation with a +n charge; X is at least one chemical element with a +3 oxidation status; Y is at least one chemical element with a + oxidation status; and T is at least one chemical element with a +4 oxidation status (Si, Ti, Sn, V), this material having a specific X-ray diffraction pattern. A method for preparation of the material and its use as a catalyst in organic compound separation and transformation processes is also described.

Abstract: A process for synthesizing a variety of molecular sieves has been developed. The process involves taking a slurry of seed crystals and adding to it nutrients (sources) of the framework elements, e.g. aluminum and silicon in order to grow the seed crystals. The rate of addition of the nutrients is controlled such that it is substantially the same as the crystal growth rate and such that there is substantially no nucleation of new crystals. The seed crystals may be the same or different than the nutrients being added, thus allowing for a layered molecular sieve. When the crystals have reached a desired size, they are isolated by conventional techniques.

Abstract: Mesoporous hexagonal, cubic or wormhole aluminosilicates derived from zeolite seeds using an ionic structure directing agent are described. The aluminum in the structures is stable so that the framework of the structures does not collapse when heated in the presence of water or water vapor (steam). The steam stable aluminosilicates can be used as acid catalysts for hydrocarbon conversions, including the fluidized bed catalytic cracking and the hydrocracking of petroleum oils, and other cracking of organic compounds.

Abstract: A process for preparing molecular sieves of type Y faujasite structure is described, as well as pre-shaped bodies of faujasite structure type Y molecular sieves. The process comprises preparing a precursor gel from a source of silica-alumina or a source of alumina and a source of silica with a template agent at a SiO2/Al2O3 greater than 7 and suitable for forming a type Y zeolite, drying the precursor gel and contacting the dried precursor gel with steam, optionally followed by caustic washing, without the formation of crystalline phases other than type Y zeolite being observed. Advantageously, the pre-shaped bodies prepared with the precursor gel of Y zeolite, when subjected to the process of the invention, will have their outer surface covered by type Y zeolite crystals. The molecular sieves so obtained may be employed as catalysts or adsorbents in various processes of the chemical or oil industry.

Abstract: Mesoporous hexagonal, cubic, lamellar, wormhole, or cellular foam aluminosilicates, gallosilicates and titanosilicates derived from protozeolitic seeds using an ionic structure directing agent are described. The silicon and aluminum, gallium or titanium centers in the structures are stable so that the framework of the structure does not collapse when heated in the presence of water or water vapor (steam). The steam stable compositions can be used as catalysts for hydrocarbon conversions, including the fluidized bed catalytic cracking and the hydrocracking of petroleum oils, and other reactions of organic compounds.

Abstract: Process for the preparation of doped pentasil-type zeolite, which process comprises the steps of:

Abstract: A process for the preparation of a composition comprising a pentasil-type zeolite, which process comprises the following steps:

Abstract: The invention concerns a zeolite with structure type MTT comprising MTT zeolite crystals with a size of less than 5 &mgr;m, at least a portion of the MTT zeolite crystals being in the form of MTT zeolite crystal aggregates, said zeolite being characterized in that the granulometry of the aggregates is such that the dimension Dv,90 is in the range 40 nm to 100 &mgr;m. The invention also concerns the preparation of the zeolite and the use of the zeolite as a catalyst in a process for converting hydrocarbon feeds, and in particular in a process for isomerizing straight chain paraffins.

Abstract: A process for synthesizing a crystalline aluminosilicate zeolite having an MFI structure comprising crystallizing the zeolite from an alkaline aqueous reaction mixture that comprises SiO2 and Al2O3 or their hydrated derivatives, and an amorphous aluminosilicate nucleating gel with an SiO2/Al2O3 ratio of from about 10 to less than 20. The reaction mixture does not contain an organic template.

Abstract: Applicants have developed a continuous process for synthesizing various molecular sieves. The process enables one to control both the particle size and particle size distribution. Any of the molecular sieves represented by the empirical formula on an anhydrous basis: rR2O:(SixAlyPz)O2, where R is at least one structure directing agent, “r”, “x”, “y” and “z” are the mole fractions of R, Si, Al and P respectively, can be prepared using this process. The process involves continuously adding separate streams comprising reactive sources of at least each framework element into a continuous crystallization reactor. Either interstage backmixing is introduced or the number of stages is adjusted in order to control particle size.

Abstract: This invention provides a process for the synthesis of ZSM-12 using the N,N-dimethylhexamethyleneimine cation as a directing agent. The process enables ZSM-12 to be produced at silica/alumina molar ratios below 50 with little or no co-production of impurity phases. Small crystal forms of ZSM-12 can also be produced using the process of the invention.

Abstract: The present invention refers to a microporous crystalline material of zeolitic nature named ITQ-7, to the process of preparation thereof and to the use of ITQ-7 in processes of separation and transformation of organic compounds. The zeolitic material of this invention is also characterized by its characteristic X-ray diffraction pattern and its microporous properties. The process of preparation is characterized in the use of one or several organic additives in a reaction mixture that is crystallized by heating.

Abstract: The present invention refers to a microporous rystalline material of zeolitic nature named ITQ-10, to the process of its preparation and to the use of ITQ-10 in processes of separation and transformation of organic compounds.

Abstract: A process for the production of zeolites with a high Si/Al atomic ratio formed by the conversion of amorphous polysilicas (polysilacic acid) with a source of aluminum ions and optionally a template wherein the conversion occurs at a temperature of less than about 100° C., wherein ammonium hydroxide and/or an alkali metal silicate is added to the conversion solution.

Abstract: A zeolite A or an A/X mixture having an LCC>70 g liquid/100 g zeolite (hydrated) and a cold water CER>200 mg CaCO3/gram anhydrous zeolite (hydrated). The zeolite product may have a crystal size of 0.1-0.7 microns, a bulk density of 0.19-0.37 g/ml, and a median particle size of 1-5 microns. A process for making zeolite A or A/X mixtures is also claimed, including mixing a sodium silicate solution, a sodium aluminate solution, and an amorphous aluminosilicate initiator gel in a mixing vessel to create an aluminosilicate synthesis gel, and crystallizing the aluminosilicate synthesis gel to form zeolite crystals. The sodium aluminate solution may be added gradually to at least the sodium silicate solution at a rate of about 1-5% of the total batch alumina per minute, and/or a percentage of the total batch alumina may be added as alumina trihydrate (ATH) powder.

Abstract: In a process for synthesizing a porous crystalline material, a mixture capable of forming said material is prepared wherein the mixture comprises sources of water, an oxide of a tetravalent element Y, preferably silicon, an oxide of a trivalent element X, wherein X is selected from the group consisting of aluminum, boron, gallium, iron, and indium, fluoride ions, and an organonitrogen cation RNm+ capable of directing the synthesis of said material, wherein the molar ratio of fluoride ions to organonitrogen cations RNm+ in said mixture is greater than 1.15 m but less than 2.5 m. The mixture is maintained under crystallization conditions until crystals of said material are formed and the resultant crystalline material is recovered.

Abstract: A process for synthesizing a crystalline aluminosilicate zeolite having an MFI structure comprising crystallizing the zeolite from an alkaline aqueous reaction mixture that comprises SiO2 and Al2O3 or their hydrated derivatives, and an amorphous aluminosilicate nucleating gel with an SiO2Al2O3 ratio of from about 10 to less than 20. The reaction mixture does not contain an organic template.

Abstract: This invention relates to a process for synthesis of an EUO-structural-type zeolite that comprises at least one element X that is selected from among silicon and germanium and at least one element T that is selected from among aluminum, iron, gallium, boron, titanium, vanadium, zirconium, molybdenum, arsenic, antimony, chromium and manganese, whereby said process is carried out in the presence of an organic structuring agent that is derived from dibenzyldimethylammonium (DBDMA) or its precursors and in the presence of nuclei of at least one zeolitic material of the same structure as the zeolite that is to be synthesized. The zeolite that is thus obtained has an X/T ratio of between 5 and 50. It is used in particular as a catalyst, for example in a process for isomerization of aromatic compounds with 8 carbon atoms per molecule.

Abstract: The present invention relates to new crystalline zeolite SSZ-58 prepared using a N-butyl-N-cyclooctylpyrrolidinium cation or N-propyl-N-cyclooctylpyrrolidinium cation templating agent, and processes employing SSZ-58 as a catalyst.

Abstract: The present invention relates to a new crystalline zeolite SSZ-57. The present invention also relates to crystalline zeolites prepared by using N-butyl-N-cyclohexylpyrrolidinium cation, N-propyl-N-cycloheptylpyrrolidinium cation or N-butyl-N-cyclooctylpyrrolidinium cation as structure directing agents.

Abstract: This invention provides a process for the synthesis of MCM-58 using 1-(1-adamantyl)pyridinium cations as a directing agent. The resultant MCM-58 is useful in a variety of hydrocarbon conversion reactions including toluene disproportionation, transalkylation of aromatics, reaction of paraffins with aromatics, paraffin isomerization and alkylation of aromatics with olefins.

Abstract: This invention relates to a process for producing zeolite-bound high silica zeolites and the use of the zeolite-bound high silica zeolite produced by the process for hydrocarbon conversion. The process is carried out by forming an extrudable paste comprising a mixture of high silica zeolite in the hydrogen form, water, silica, and optionally an extrusion aid, extruding the extrudable paste to form silica-bound high silica zeolite extrudates, and then converting the silica of the binder to a zeolite binder. The zeolite-bound high silica zeolite produced by the process comprises high silica zeolite crystals that are bound together by zeolite binder crystals. The zeolite-bound high silica zeolite finds particular application in hydrocarbon conversion processes, e.g., catalytic cracking, alkylation, disproportionation of toluene, isomerization, and transalkylation reactions.

Abstract: The invention concerns a zeolite with structure type EUO comprising EUO zeolite crystals with a size of less than 5 &mgr;m, at least a portion of the EUO zeolite crystals being in the form of EUO zeolite aggregates, characterized in that the granulometry of the aggregates is such that Dv,90 is 500 &mgr;m or less. The invention also concerns the preparation of the zeolite and the use of the zeolite as a catalyst, for example in a process for isomerising aromatic compounds containing 8 carbon atoms per molecule.

Abstract: The present invention refers to a crystalline material of zeolitic nature named ITQ-3 characterized by its characteristic X-ray diffraction pattern and its microporous properties, to the process of preparation thereof characterized by the use of one or several organic additives in a reaction mixture that is made to crystallize by heating and to the use thereof in processes of separation and transformation of organic compounds, which material has the empirical formula x(M1/nXO2):yYO2:SiO2 where x has a value lower than 0.15 and may be equal to zero; and y has a value lower than 0.1 and may be equal to zero; M is H+ or an inorganic cation of charge +n, X is a chemical element with oxidation state (Al, Ge, B and Cr), Y is a chemical element with oxidation state (Ti, Ge and V), and when x=0 and y=0 can be described as a new polymorphous of silica of microporous nature.

Abstract: There is provided macrostructures of porous inorganic material which can have controlled size, shape, and/or porosity and a process for preparing the macrostructures. The macrostructures comprise a three-dimension network of particles of porous inorganic materials. The process for preparing the macrostructures involves forming an admixture containing a porous organic ion exchanger and a synthesis mixture capable of forming the porous inorganic material and then converting the synthesis mixture to the porous inorganic material. After formation of the composite material, the porous organic ion exchanger can be removed from the composite material to obtain the macrostructures.

Abstract: Mesoporous hexagonal, cubic or wormhole aluminosilicates derived from zeolite seeds using an ionic structure directing agent are described. The aluminum in the structures is stable so that the framework of the structures does not collapse when heated in the presence of water or water vapor (steam). The steam stable aluminosilicates can be used as acid catalysts for hydrocarbon conversions, including the fluidized bed catalytic cracking and the hydrocracking of petroleum oils, and other cracking of organic compounds.

Abstract: Mesoporous hexagonal, cubic or wormhole aluminosilicates derived from zeolite seeds using an ionic structure directing agent are described. The aluminum in the structures is stable so that the framework of the structures does not collapse when heated in the presence of water or water vapor (steam). The steam stable aluminosilicates can be used as acid catalysts for hydrocarbon conversions, including the fluidized bed catalytic cracking and the hydrocracking of petroleum oils, and other cracking of organic compounds.

Abstract: The present invention concerns a process for preparing a zeolite with structure type MTT comprising at least one element X selected from silicon and germanium and at least one element T selected from iron, aluminium, gallium, boron, titanium, vanadium, zirconium, molybdenum, arsenic, antimony, chromium and manganese, characterized in that seeds of at least one zeolitic material are used comprising at least one element X′ selected from silicon and germanium and at least one element T′ selected from iron, aluminium, gallium, boron, titanium, vanadium, zirconium, molybdenum, arsenic, antimony, chromium and manganese, said seeds being different from the zeolite with structure type MTT being synthesised. The present invention also concerns the use of the zeolite obtained as a catalyst in a process for converting hydrocarbon-containing feeds, as an adsorbent to control pollution and as a molecular sieve for separation.

Abstract: The invention relates to a process for production of zeolites from raw materials with alkali alumino-hydrosilicate content comprising converting the alkali alumino-hydrosilicate content of the raw material into an amorphous state by acidic treatment, separating the intermediate amorphous solid material from the liquid phase and optionally purifying same, re-suspending it in water, alkalizing the suspension, followed by forming a slurry of the composition corresponding to the type of zeolite to be manufactured optionally by blending it with components containing SiO2, and/or Al2O3 and/or Na2O, followed by crystallization by method known per se after optionally adding crystal nuclei and/or aging of the synthesis slurry and separating the obtained zeolite product.

Abstract: Hydrothermal synthesis of the natural, alkaline earth zeolites via the alteration of Y-zeolite is presented. Synthetic versions of the zeolites harmotome, heulandite, brewsterite and gmelinite are synthesized from Y-zeolite using alkaline earth cations containing solutions. The effect of the composition of the starting zeolite, the composition of the solution phase, the presence or absence of seeds and the experimental conditions are discussed.

Abstract: The invention describes a process for preparing P zeolites in which aluminate and silicate solutions are reacted in the presence of a P-zeolite seed.

Abstract: The invention describes a process for preparing P zeolites in which aluminate and silicate solutions are reacted in the presence of a P-zeolite seed.

Abstract: The present invention relates in general to a method of making ZSM-5 zeolite. More specifically, the present invention relates to using plant waste material such as rice hull ash or any siliceous waste containing amorphous SiO2 as a source for SiO2 in making ZSM-5, thus producing a ZSM-5 that is lower cost than prior art methods. The method comprises providing siliceous ash having a carbon content between about 0 percent and 10 percent by weight of total rice hull ash, wherein the SiO2 content is greater than 90 percent by weight of total siliceous ash, and wherein the SiO2 and carbon are substantially amorphous. The synthesis of the ZSM-5 of the invention involves first suspending the siliceous ash in water. Next, a source of alumina is added to the suspension of siliceous ash. The source of alumina and siliceous ash are added such that the molar ratio of SiO2 to Al2O3 in the ZSM-5 is in the range from approximately 15 to 150, thus forming a second suspension.

Abstract: The present invention relates to new crystalline zeolite SSZ-47 prepared using a bicyclo ammonium cation templating agent.

Abstract: The present invention concerns a process for preparing a zeolite with structure type EUO comprising at least one element X selected from silicon and germanium and at least one element T selected from iron, aluminium, gallium, boron, titanium, vanadium, zirconium, molybdenum, arsenic, antimony, chromium and manganese, characterized in that seeds of at least one zeolitic material are used comprising at least one element X′ selected from silicon and germanium and at least one element T′ selected from iron, aluminium, gallium, boron, titanium, vanadium, zirconium, molybdenum, arsenic, antimony, chromium and manganese with a ratio X′/T′ of less than 200, said seeds being different from the zeolite with structure type EUO being prepared.

Abstract: A process for synthesising a zeolite with structure type EUO comprising at least one element X selected from silicon and germanium and at least one element T selected from aluminum, iron, gallium, boron, titanium, vanadium, zirconium, molybdenum, arsenic, antimony, chromium and manganese, comprises reacting an aqueous mixture comprising at least one source of at least one element X, at least one source of at least one element T, and at least one precursor of an organic compound comprising at least one alkylated polymethylene &agr;-&ohgr; diammonium derivative, wherein at least one precursor is selected from monoamines. The zeolite obtained is used as a catalyst in a process for converting hydrocarbon-containing feeds, as an adsorbent to control pollution and as a molecular sieve for separation, and particularly for isomerising aromatic compounds containing 8 carbon atoms.

Abstract: Low temperature hydrothermal treatment of an LTL zeolite-producing mixture produces a colloidal suspension of the zeolite; the suspension may be used as seeds in Al— and Ga—LTL zeolite manufacture.

Abstract: A synthetic faujasite zeolite and a process for preparing the same which includes forming a reaction mixture consisting essentially of water, a source of silica, a source of alumina, Na2O nd nucleation centers, wherein the reaction mixture has molar ratios of constituents including Na2O/SiO2, 0.4-0.9; SiO2/Al2O3, 7-13; and H2O/Na2O, 30-45, and wherein the nucleation centers have molar ratios of constituents including Na2O/SiO2, 0.5-2.0; SiO2/Al203, 10-20; and H2O/Na2O, 10-40; and heating the reaction mixture to a temperature ranging from 90 to 110° C. for a time period ranging from 23 to 29 hours to obtain the synthetic faujasite zeolite, wherein the synthetic faujasite zeolite has a crystallite size ranging from 1500 to 2000 Å, a particle size ranging from 4000 to 8000 Å, and a retention of surface of more than 70% of that of a parent zeolite, when exchanged with ammonia and subjected to hydrothermal treatment at 650° C. for 3 hours and with 100% steam.

Abstract: The invention includes a method for preparing a crystalline zeolite having the X-ray diffraction lines of Table 1. The method includes preparing a template-free reaction mixture including at least one active source of a first oxide selected from the group consisting of an oxide of silicon, germanium or both, optionally at least one active source of a second oxide selected from the group consisting of an oxide of aluminum, boron, gallium, iron or a mixture thereof; and heating the reaction mixture at crystallization conditions for sufficient time to form a crystallized material containing zeolite crystals having the X-ray diffraction lines of Table 1, where said zeolite crystals have a first oxide/second oxide molar ratio greater than 12.