Abstract: P-type zeolite having the oxide formula M2/nAl2O3 (1.8-2.66) SiO2 y H2O and having a Calcium Binding Capacity of between 100 and 145 mg/g, preferably between 110 and 140 and a Calcium uptake rate of between 12 and 100 seconds, preferably below 50 seconds can be prepared from metakaolin.

Abstract: Mixtures of synthesis mixtures of different alkalinity's produce small MFI crystals that are not spherical.

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: A process for converting hydrocarbons by contacting a hydrocarbon feedstream under hydrocarbon conversion conditions with a large crystal zeolite catalyst. The large crystal zeolite of the catalyst used in the hydrocarbon conversion process is made by heating an aqueous zeolite synthesis mixture under agitation to a temperature equal to or less than the effective nucleation temperature of the synthesis mixture. After this step, the aqueous synthesis mixture is heated in the absence of agitation to a temperature equal to or greater than the effective nucleation temperature of the aqueous zeolite synthesis mixture. The process finds particular application in hydrocarbon conversion processes where reduced non-selective acidity is important for reaction selectivity and/or the maintenance of catalyst activity, e.g., toluene disproportionation, dealkylation, alkylation, and transalkylation.

Abstract: The invention concerns IM-5 zeolite with a chemical composition with the following formula, expressed in terms of the mole ratios of the oxides for the anhydrous state: 100XO.sub.2,mY.sub.2 O.sub.3, pR.sub.2/n O where m is 10 or less; p is in the range 0 to 20; R represents one or more cations with valency n; X represents silicon and/or germanium; Y represents one or more of the following elements: aluminum, iron, gallium, boron and titanium. The zeolite is characterized by an Xray diffraction diagram, in its as synthesized state, which comprises the results shown in Table 1 of the description. The invention also concerns the preparation of the zeolite, any catalyst containing the zeolite and any catalytic process using such a catalyst.

Abstract: A composition of matter represented by the formulaM.sup.n+.sub.z/n [Si.sub.(2-x-y) Al.sub.(y) Zn.sub.(x) ]O.sub.4 .multidot..cndot.wH.sub.2 OwhereinM is a cation selected from Groups 1, 2, 7, 10, 11, 12 and the f block elements as defined by the Periodic Table of the elements as adopted by IUPAC; n is the valence of the selected cation, M; x is greater than or equal to 0.02 but less than or equal to 1;y is less than or equal to 0.98; z>0.54; and w ranges from 0 to about 8;provided that when z.gtoreq.0.80, then 2x+y does not equal z;which composition of matter has the FAU structure with zinc residing in tetrahedral positions in the framework of the FAU structure;and whereupon such composition of matter is converted to a hydrated sodium form, the hydrated sodium form of the composition of matter exhibits a lattice constant (a.sub.0)wherein ##EQU1## where R represents the Si/Al molar ratio of the composition of matter.

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.

Abstract: A polyester composition comprising 0.005 to 10% by weight compound oxide particles having a volume average particle meter of 0.005 to 2 .mu.m, a relative standard deviation .sigma. of the particle diameter of not more than 0.3, and composed mainly of silicon (Si), aluminum (Al) and at least one alkali metal (M), wherein the contents of the silicon, aluminum and alkali metal satisfy the following requirements: 10 wt. %.ltoreq.Si.ltoreq.45 wt. %, 3 wt. %.ltoreq.Al.ltoreq.30 wt. % and 0.5 wt. %.ltoreq.M.ltoreq.20 wt. %, respectively. The polyester composition, particularly when formed into films, has excellent surface evenness, running ability and abrasion resistance, and such films are suitable particularly for magnetic recording media and other applications.

Abstract: The present invention relates to a microporous crystalline material of zeolitic nature, called ITQ-1A, to the process for its preparation and its use in processes of separation and transformation of organic compounds. In the roasted and anhydrous stage, the chemical composition of the material corresponds to the empirical formula: x(M.sub.1/n XO.sub.2):yYO.sub.2 :SiO.sub.2, wherein x has a value smaller than 0.02 and may equal 0: y has a value smaller than 0.04 and may equal 0: m is H.sup.+ or an inorganic cation with the charge +n: X is a chemical element with an oxidation status +3 (Al, Ga, B, Cr) and Y is a chemical element with an oxidation status +4 (Ti, Ge, V). When x=0 and y=0, the material may be described as a new polymorphe form of microporous silica. The material of this invention is characterized also by its X ray diffraction pattern.

Abstract: This invention relates to a new synthetic porous crystalline material, designated MCM-68, a method and novel polycyclic organic cation for its preparation and its use in catalytic conversion of organic compounds. The new crystalline material exhibits a distinctive X-ray diffraction pattern and has a unique crystal structure which contains at least one channel system, in which each channel is defined by a 12-membered ring of tetrahedrally coordinated atoms, and at least two further, independent channel systems, in each of which each channel is defined by a 10-membered ring of tetrahedrally coordinated atoms, wherein the number of unique 10-membered ring channels is twice the number of 12-membered ring channels.

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: Colloidal Offretite, a process for its manufacture, and zeolite manufacture using it.

Abstract: Disclosed are high purity low-silica faujasite type zeolite showing a faujasite single phase on X-ray diffraction, having a SiO.sub.2 /Al.sub.2 O.sub.3 molar ratio of 1.9 to 2.1 and a water adsorption of 35.0% by weight or more when converted to the Na type, and comprising particles having smaller primary particle size and particles having larger primary particle size, wherein the primary particle size of the smaller particles is from 1 .mu.m to 8 .mu.m, the primary particle size of the larger particles is from 5 .mu.m to 15 .mu.m, and the particles having smaller primary particle size accounts for 90% or more of the total particle number; and a method for producing low-silica faujasite type zeolite having a SiO.sub.2 /Al.sub.2 O.sub.3 molar ratio of 1.9 to 2.

Abstract: There is provided a process for converting hydrocarbons which utilizes a zeolite bound zeolite catalyst that has enhanced performance when utilized in hydrocarbon conversion processes, e.g., catalytic cracking, alkylation, disproportionation of toluene, isomerization, and transalkylation reactions. The catalyst comprises a first zeolite having particles of greater than about 0.1 micron average particle size and a binder comprising second zeolite particles having an average particle size less than said first particles.

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: rR.sub.2 O:(Si.sub.x Al.sub.y P.sub.z)O.sub.2, where R is at least one templating 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 reactive sources of the desired components along with a structure directing agent into a continuous crystallization reactor. Either interstage backmixing is introduced or the number of stages is adjusted in order to control particle size. Finally, one way to control particle size distribution is to split the product stream into at least two streams and flowing each stream to a wet miller operated at different severity and then reblending to obtain at least a bimodal distribution.

Abstract: The present invention relates to a process for synthesis of flyash based Zeolite-A, said process comprising grinding and mixing of flyash and caustic soda in a ratio of 1:1.2 and optionally adding sodium aluminate or aluminium hydroxide to obtain a fine homogeneous fusion mixture; heating the said mixture in an inert vessel at about 500-600.degree. C. for about 1-2 hrs. to obtain a fused mass; cooling, milling, and mixing the said fused mass in distilled water for about 8-10 hrs. with simultaneous optional additon of sodium aluminate or alum solution, in the present or absence of NaC1 followed by optional addition of zeolite-A seeding to obtain amorphous alumino -silicate slurry; subjecting the said slurry to hydrothermal crystallisation at about 90-110.degree. C. for 2 to 4 hrs. to obtain Zeolite-A crystals; and washing the said crystals with water and then subjecting the washed crystals to oven drying at about 50-60.degree. C. to obtain the FAZ-A crystals.

Abstract: The present invention relates to a composition and a method for preparing ZSM-48 exhibiting an X-ray pattern having values as set forth in Table 1 of the specification. The method of the present invention includes (a) preparing a reaction mixture; and (b) maintaining the mixture under crystallization conditions until crystals of the ZSM-48 are formed. The mixture includes a source of silica, a source of trivalent metal oxide, an alkali metal oxide, ethylenediamine and water. The mixture, in terms of mole ratios of oxides, has the following composition ranges:SiO.sub.2 /Me.sub.2 O.sub.3 : 100 to 1500,M.sub.2/n O/SiO.sub.2 : 0 to 0.2,RN/SiO.sub.2 : 2.0 to 5.0,OH.sup.- /SiO.sub.2 : 0 to 0.3, andH.sub.2 O/SiO.sub.2 : 10 to 100,wherein Me is a trivalent metal, M is an alkali metal and RN is ethylenediamine.

Abstract: Large crystal zeolites are prepared by heating a zeolite synthesis mixture under agitation to a temperature equal to or less than the effective nucleation temperature of the zeolite synthesis mixture and thereafter the zeolite synthesis mixture is heated without agitation to a temperature equal to or greater than the effective nucleation temperature of the zeolite synthesis mixture.

Abstract: The present invention discloses a phosphorus-containing zeolite having MFI type structure. The anhydrous composition (based on the mole ratios of oxides) of the above zeolite is0.01-0.3Na.sub.2 O.Al.sub.2 O.sub.3.0.2-1.5P.sub.2 O.sub.5.30-90SiO.sub.2Said zeolite possesses a X-ray diffraction pattern listed in Table 1. The pore volume ratio of 1.0-10 nm mesopore to 10-membered ring pore is no less than 0.5. The crystal particle size of said zeolite is in the range of 0.8-2.0 micron. Said zeolite exhibits superior hydrothermal stability in catalytic conversion of hydrocarbons. Especially, when said zeolite is applied in catalytic cracking of hydrocarbons, it will enhance the crackability of large molecules, improve gasoline octane value and stability, and reduce the sulfur content in the gasoline as well.

Abstract: This invention relates to zeolitic molecular sieve compositions characterized by outstanding capability to complex multivalent cations, especially calcium. In particular, the invention relates to novel zeolitic molecular sieve compositions, having a high alumina-to-silica ratio, with additional occluded non-zeolitic silicate, and solid particulate alumina is the source of alumina in the zeolite.

Abstract: New synthetic zeolites incorporating alkaline earth elements and routes for preparing those zeolites by hydrothermal alteration of zeolite P1 are disclosed. New methods for producing P1 zeolites are also identified. Synthetic heulandite, brewsterite, epistilbite and harmotome, among other zeolites can be prepared.

Abstract: Process for manufacturing an alkali metal aluminosilicate of zeolite P type wherein a sodium silicate solution and a sodium aluminate solution are continuously added together in a first reacting zone in the presence of zeolite P seeds, to produce a first mixture said mixture being continuously transferred from this first reacting zone to a second reacting zone, the resulting product being eventually filtered, washed and dried.

Abstract: The invention relates to a synthetic crystalline material and its use in catalytic conversion of organic compounds and as a sorbent. The crystalline material contains one or more microporous crystalline phases, having a micropore volume greater than or equal to about 0.15 cc/g distributed in channels between about 3 to about 15 .ANG. in average diameter which is rendered accessible by a mesopore volume of greater than or equal to about 0.1 cc/g distributed in channels between about 20 to about 100 .ANG. in average diameter. A process is also provided for preparing the crystalline material of the present invention.

Abstract: ZSM-22 zeolite which is particularly pure and whose synthesis does not require the synthesis mixture to be stirred can be produced by the addition to the synthesis mixture of a small quantity e.g. 1000 ppm, of preformed ZSM-22 zeolite seed crystals.

Abstract: A method is disclosed for preparing crystalline aluminosilicate Y zeolite from a reaction mixture containing only sufficient water to produce Y zeolite. In one embodiment, the reaction mixture is self-supporting and may be shaped if desired. In the method, the reaction mixture is heated at crystallization conditions and in the absence of an added external liquid phase, so that excess liquid need not be removed from the crystallized product prior to drying the crystals.

Abstract: A method is disclosed for preparing crystalline aluminosilicate zeolite L from a reaction mixture containing only sufficient water to produce zeolite L. In one embodiment, the reaction mixture is self-supporting and may be shaped if desired. In the method, the reaction mixture is heated at crystallization conditions and in the absence of an added external liquid phase, so that excess liquid need not be removed from the crystallized product prior to drying the crystals.

Abstract: ZSM-22 zeolite which is particularly pure and whose synthesis does not require the synthesis mixture to be stirred can be produced by the addition to the synthesis mixture of a small quantity e.g. 1000 ppm, of preformed ZSM-22 zeolite seed crystals.

Abstract: Crystalline tectosilicate ZSM-5 zeolite may be prepared which comprise substantially needle-shaped agglomerates. Tectosilicate ZSM-5 zeolite having a .sup.29 Si NMR spectrum having at least three peaks indicates the presence of Si atoms in the structure having 0, 1 or 2 T-atoms as nearest neighbors.

Abstract: Process for manufacturing an alkali metal aluminosilicate of zeolite wherein zeolite P seeds are produced in situ in a first reacting gel with a SiO.sub.2 /Al.sub.2 O.sub.3 ratio of above 2.2 and it is only after the formation of zeolite P seeds, but before said seeds have the time to fully grow, that sodium aluminate is added in order to get a gel which can have a SiO.sub.2 /Al.sub.2 O.sub.3 ratio of about 2 which therefore enables producing a zeolite P having also a SiO.sub.2 /Al.sub.2 O.sub.3 ratio of about 2.

Abstract: A method is disclosed for preparing crystalline aluminosilicate Y-type faujasite from a reaction mixture containing an organic template capable of producing Y-type faujasite. The reaction mixture contains only sufficient water to produce Y-type faujasite. In one embodiment, the reaction mixture is self-supporting and may be shaped if desired. In the method, the reaction mixture is heated at crystallization conditions and in the absence of an added external liquid phase, so that excess liquid need not be removed from the crystallized product prior to drying the crystals.

Abstract: The invention concerns a process for the synthesis of zeolites based on element(s) T and mesoporous solids based on element(s) T, T being silicon and/or aluminium, comprising the following sequence of steps:i) synthesizing a reaction medium which is a homogeneous source of element(s) T containing:a) at least one source of element(s) T selected from the group formed by aqueous basic solutions of silica or silica and alumina and alcoholic solutions of alkyl tetraorthosilicate and trialkoxyaluminium;b) optionally, at least one structuring agent;c) optionally, seeds of the desired crystalline phase;ii) heating the reaction medium to a temperature in the range 20.degree. C. to 220.degree. C. for a period in the range several minutes and several days;iii) injecting at least one chemical agent at a controlled rate to generate polycondensable species in said medium.

Abstract: A process for producing a titanium-containing zeolite such as TS-1 titanium silicalite is disclosed. A precursor mixture comprising a silica source such as tetraalkylorthosilicate, a titanium source such as titanium alkoxide, a growth medium comprising a nitrogen-containing organic base such as an amine, a fluoride-containing mineralizing agent such as hydrogen fluoride, and an optional organic solvent, is formed then heated to yield the titanium-containing zeolite as solid crystals. A controlled amount of water may be present in the growth medium. The process is capable of providing good yields of high purity zeolites containing framework titanium atoms even in the absence of a quaternary ammonium salt.

Abstract: MFI zeolite crystals of uniform and controllable size may be produced by mixing:(i) a source of particulate silica in which silica particles present have an average diameter of 1 .mu.m or less;(ii) seeds of an MFI zeolite having an average diameter of 100 nm or less in the form of a colloidal suspension;(iii) an organic structure directing agent; and(iv) a source of fluorine or an alkali metal;to form an aqueous synthesis mixture, the seeds being present in an amount of 0.05 to 1700 ppm by weight of the synthesis mixture, and the synthesis mixture having an alkalinity in terms of OH.sup.- /SiO.sub.2 molar ratio of less than 0.1, and allowing the synthesis mixture to crystallize.

Abstract: Silica-bound extruded zeolites may be converted into binder-free zeolite aggregates by aging the zeolite in an aqueous ionic solution which contains hydroxy ions such that the initial molar ratio of OH.sup.- :SiO.sub.2 is up to 1.2 and which causes the silica binder to be converted substantially to zeolite of the type initially bound. Such extrudates have excellent mechanical strength and show advantageous properties such as adsorption comparable with non-extruded zeolite powder.

Abstract: A process to make high silica faujasite family zeolites using preformed gels and templates derived from recycled mother liquors.

Abstract: A synthetic zeolite, designated zeolite GZS-11, is made having a molar composition expressed by the formula:[x M.sub.2/n O+(1.0.+-.0.2-x)R.sub.2/n O]:Y.sub.2 O.sub.3 :y XO.sub.2 :w H.sub.2 Owhere M is an inorganic cation of valance n, R is an organic cation of valence n, "x" has a value of less than 1.0, Y is one or more of +3 valence elements, such as aluminum, boron, gallium, iron, chromium, vanadium, molybdenum, or manganese, X is one or more of +4 valence elements, such as silicon, germanium, or titanium, "y" has a value of between 6 to 25, "w" has a value of up to 4 depending upon the degree of hydration of the zeolite, and having an X-ray diffraction pattern of the as-synthesized zeolite substantially as in Table 1. The method for making the low ratio of XO.sub.2 /Y.sub.2 O.sub.3 such as SiO.sub.2 /Al.sub.2 O.sub.3 is achieved by adjusting the synthesis mixture composition during the aging stage through the addition of one or more of the solutions containing the reactive sources of zeolitic components.

Abstract: ECR-31 is a new zeolite having a 12-ring channel. It may be expected to have similar properties to other 12-ring channel zeolites in catalysis and separations.

Abstract: A process to make a seed high silica zeolite having a faujasite structure and a silica to alumina ratio greater than 6, and containing tetrapropyl ammonium and/or tetrabutyl ammonium trapped within the supercages of said structure. The optimally seeds are aged for specific times.

Abstract: A synthetic gallosilicate zeolite having a 12-ring pore structure and a process for preparing it.

Abstract: A novel process for the preparation of a crystalline titanium molecular sieve zeolite identified as ETS-10 characterized by crystals of uniform morphology which is free from halide-containing reactants is disclosed.

Abstract: This invention relates to a new method for synthesis of porous crystalline material designated MCM-58. The crystalline MCM-58 product of the present method exhibits a distinctive X-ray diffraction pattern.

Abstract: This invention relates to a new synthetic porous crystalline material, designated MCM-58, a method for its preparation and use thereof in catalytic conversion of organic compounds. The new crystalline material exhibits a distinctive X-ray diffraction pattern.

Abstract: The invention relates to a process for the preparation of crystalline clathrasil of the dodecasil 1 H structural type having an average crystal size of not more than 20 .mu.m, characterised in that an alkaline aqueous silicate-containing medium comprising templates and crystallisation seeds is heat-treated, the crystallisation seeds content, relative to the SiO.sub.2 content of the medium, being not less than 1% by weight.

Abstract: Zeolite .beta. is prepared by reacting a granular amorphous aluminosilicate, prepared by continuously reacting an aqueous solution of an alkali metal silicate and an aqueous solution containing aluminum for a specific time at a temperature of 0.degree. to 55.degree. C. and pH of 5 to 9 the following at molar ratios______________________________________ SiO.sub.2 /Al.sub.2 O.sub.3 10:1.about.200:1 and M.sub.2 O/Al.sub.2 O.sub.3 0.8.about.1.2 ______________________________________where M means an alkali metal contacting it with alkali metal hydroxide tetraethylammonium compound and water at molar ratios of ______________________________________ SiO.sub.2 /Al.sub.2 O.sub.3 10:1.about.200:1 and M.sub.2 O/SiO.sub.2 0.01.about.1, H.sub.2 O/SiO.sub.2 8.about.30 and R.sub.2 O/SiO.sub.2 0.05.about.0.7 ______________________________________where R is tetraethylammonium, for 24 to 120 hours at 70.degree. to 160.degree. C. to crystallize.

Abstract: This invention relates to a new form of crystalline material identified as having the structure of SUZ-9, to a new and useful method for synthesizing said crystalline material and to use of said crystalline material prepared in accordance herewith as a sorbent or a catalyst for organic compound, e.g., hydrocarbon compound, conversion.

Abstract: Sodium type X zeolite crystals of a particle size of 50 .mu.m or more are grown from seed crystals at a rate of about 5 .mu.m per day in a mother liquor having an approximate composition 0.94 Na.sub.2 O, 0.011 Al.sub.2 O.sub.3, and 0.200 SiO.sub.2 mol/kg by adding a fine silica powder, a somewhat coarser alumina powder, and sodium hydroxide from time to time. The addition rates are such as to maintain the mother liquor at a super-saturation level of less than 20% with respect to the alumina to avoid the formation of a gel. Throughout the growing period the mother liquor is stirred and maintained at a temperature of about 95.degree.C.

Abstract: The invention relates to a process for the preparation of low-template clathrasil, comprising heat-treating an alkaline aqueous silicate-containing medium containing crystallization seeds and an amount of a template such that the template content of the clathrasil, relative to the number of moles of the SiO.sub.2 of the medium, is less than 2 mol %.

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: This invention relates to a new form of crystalline material identified as having the structure of ZSM-18, to a new and useful method for synthesizing said crystalline material and to use of said crystalline material prepared in accordance herewith as a catalyst for organic compound, e.g., hydrocarbon compound, conversion.

Abstract: This invention relates to novel zeolitic compositions having one or more transition metals as well as aluminum and silicon in the framework tetrahedral positions. The composition has a mazzite-like structure. The invention also involves a process of preparation in which at least one divalent transition metal is directly synthesized into the product.