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: 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: There are disclosed a fibrous zeolite ZSM-5 and a preparation method thereof. The fibrous zeolite ZSM-5 which is represented by xSiO.sub.2 (1-x)Al.sub.2 O.sub.3 (x is 0.9429.about.0.9943) can be directly used as a reinforcement material because of its fibrous form, and has sufficient sites on which other substances can be easily adsorbed and from which the adsorbed substances can be easily desorbed. Also, the fibrous zeolite can be applied to an optical material due to its transparent property.

Abstract: Zeolite crystals having an offretite structure have smaller crystals and/or can be produced using a synthesis mixture of lower alkalinity than could otherwise be used, if a divalent metal cation, such as magnesium, barium or cobalt is included in the synthesis mixture.

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: A titanosilicate catalyst and method for preparing the same, comprising primary titanosilicate particles which are combined with one another, wherein the titanosilicate catalyst comprises pores having a pore diameter of from 50 to 300 .ANG.. The inventive catalyst exhibits activity in a hydroxylation reaction of an aromatic compound, or an epoxidation reaction of an olefin, or an ammoximation reaction of a ketone using hydrogen peroxide as an oxidant.

Abstract: Zeolite L containing caesium having enhanced catalytic properties is prepared by a process in which said zeolite L is crystallized from a synthesis mixture with a molar composition (expressed as oxides) of:______________________________________ K.sub.2 O/SiO.sub.2 0.22 to 0.30 K.sub.2 O/Cs.sub.2 O 5 to 12 H.sub.2 O/K.sub.2 O 50 to 90 and SiO.sub.2 /Al.sub.2 O.sub.3 6.0 to 7.0 ______________________________________and containing 0.5 to 20 ppm (by weight) of divalent metal cations, e.g. Mg ions. The zeolite L can form part of a dehydrocyclization and/or isomerisation catalyst.

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: Binderless zeolite L particles are prepared by a method in which particles are formed from silica and from 0 to 95 wt % preformed zeolite L crystallites, and the particles are thereafter reacted with an alkaline solution comprising a source of alumina to convert the silica binder to zeolite L. These particles may comprise cylindrical zeolite L crystallites with a mean diameter of at least 0.05 micron in a zeolite L matrix and may be used as catalyst. Also acyclic hydrocarbons are dehydrocyclized and/or isomerized by contacting them at a temperature of from 370.degree. C. to 600.degree. C. with this catalyst incorporating at least one Group VIII metal having dehydrogenating activity to convert at least part of the acyclic hydrocarbons into aromatic hydrocarbons.

Abstract: The mesopore volume in pores of diameters ranging from 2 to 60 nm of zeolite Y materials is increased by the hydrothermal treatment of such zeolites at temperatures above the atmospheric boiling point of the treating solution. Unique zeolites are produced as result of such process.

Abstract: There are disclosed a fibrous zeolite and a preparation method thereof wherein the fibrous zeolite, represented as xTiO.sub.2.(1-x)SiO.sub.2 (x is 0.02.about.0.1), which is easy to adsorb and desorb, and is easy to use as a functional material, and can be directly used as a reinforcement material.

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

Abstract: Abstract of the Disclosure: Pentasil zeolites agglomerated in the form of hollow spheres and having a particle size of from 5 to 200 micron are prepared by treating a mixture of an aqueous alkylenediamine, alkylenetriamine and/or alkylenetetramine, silica and an aluminum, boron and/or titanium salt at from 20.degree. to 100.degree. C., then crystallizing the product at from 110.degree. to 200.degree. C. and from 0.01 to 50 bar and calcining it at from 400.degree. to 650.degree. C., and said zeolites are used as catalysts and/or adsorbents.

Abstract: Potassium zeolites of type L in which the crystals are very flat cylinders of "hockeypuck" or "coin" shape may be prepared by adjusting the K.sub.2 O/SiO.sub.2 and SiO.sub.2 /Al.sub.2 O.sub.3 ratio and including in the mixture from which the zeolite is crystallized a small amount of divalent cation such as magnesium or barium. The resulting zeolite has a short channel length and is particularly useful as a base for aromatization catalysis.

Abstract: The crystal size and shape of zeolite KL can be improved by forming the zeolite from a synthesis mixture in which the molar ratio of K.sub.2 O/SiO.sub.2 is 0.18 to 0.36, and in which the synthesis mixture comprises iron preferably in an amount such that the molar ratio of Fe.sub.2 O.sub.3 /Al.sub.2 O.sub.3 is 0.015 to 0.3.

Abstract: Type X zeolites whose charge-compensating cations are composed of 95 to 50% lithium ions, 4 to 50% of one or more of aluminum, cerium, lanthanum and mixed lanthanides and 0 to 15% of other ions. The zeolites preferentially adsorb nitrogen from gas mixtures.

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-: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: The present invention is a rare-earth exchanged form of zeolite Q, which shows high thermal stability, and properties characteristic of a 12-ring zeolite structure.

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: An improved method of synthesizing large pore zeolites is disclosed and claimed. The method comprises preparing a reaction mixture containing a source zeolite on alkali metal, nitrogen containing organic cation, a source of silica, and water, and having the following composition in terms of the mole ratios:______________________________________ M.sup.+ /SiO.sub.2 = 0.01-1.00 OH.sup.- /SiO.sub.2 = 0.15-0.80 H.sub.2 O/SiO.sub.2 = 20-120 Q/SiO.sub.2 = 0.10-1.00 SiO.sub.2 /Y.sub.2 O.sub.3 = Greater Than 8 ______________________________________wherein M.sup.+ is an alkali metal not supplied by the source zeolite, Q is an organic template, and Y is a mixture of aluminum from the source zeolite, wherein said source zeolite contains soda lite substructures having tetrahedra atom densities of less than about 15 TO.sub.2 per 1000 .ANG..sup.3 ; maintaining the reaction mixture at crystallization temperature until crystals are formed; and recovering the crystals.

Abstract: Disclosed is an alumina-silica resin additive consisting of amorphous alumina-silica particles in which a definite cubic or spherical shape is retained in primary particles and the particle sizes of both the primary particles and the secondary particles are controlled to very small values. This additive is excellent in dispersibility in a resin, non-blowing property, slip characteristic and anti-blocking property. A product obtained by surface-treating the amorphous alumina-silica particles with a certain amount of an organic lubricant is very valuable as a filler.

Abstract: In the hydrothermal synthesis of crystalline microporous molecular sieves from a reaction system containing an organic templating agent, it is found that removal of at least some of the organic reagent prior to the time the formation of crystalline product is complete results in an increased yield of the product. The removal of the organic reagent disrupts the equilibrium that is normally established in the reaction system at the selected crystallization temperature between product formation and product dissolution and shifts the reaction toward the formation of additional product before a new equilibrium can form.

Abstract: Zeolite L with flat basal planes, and reduced crystallite size is prepared in a synthesis modified by the addition of small amounts of additional metal such as magnesium, calcium, barium, cobalt, zinc, chromium, manganese or nickel. The addition of these metals also suppresses unwanted zeolite W formation even when the synthesis would otherwise form this zeolite.

Abstract: A method for synthesizing molecular sieves is disclosed. The method comprises preparing an aqueous mixture comprising:a) a source zeolite, wherein said source zeolite contains sodalite substructures and has a tetrahedra atom density of less than about 15 TO.sub.2 per 1000 .ANG..sup.3, and wherein said source zeolite has a silica/alumina mole ratio greater than 200; an alkali metal oxide; and an organic template, and wherein said aqueous mixture has a composition in terms of mole ratios of oxides falling within the following ranges:______________________________________ M+/SiO.sub.2 = 0.01-1.00 OH-/SiO.sub.2 = 0.15-0.80 H.sub.2 O/SiO.sub.2 = 20-120 Q/SiO.sub.2 = 0.10-1.00 SiO.sub.2 /Y.sub.2 O.sub.

Abstract: This invention relates to basic compositions comprising a zeolite and an alkali metal compound wherein the sum of the amount of the alkali metal in the compound plus any metal cation exchanged into the zeolite is in excess of that required to provide a fully metal cation-exchanged zeolite. This invention further relates to methods for preparing the instant compositions. In a preferred embodiment the instant compositions are prepared by impregnating a zeolite with a solution of an alkali metal salt wherein said alkali metal impregnated in the zeolite is in excess of that required to exchange out the ion exchangable sites present in the zeolite, drying the resultant impregnated material and then calcining the resultant composition.