Abstract: A hydrocarbon conversion catalyst composition which comprises ZSM-48 and/or EU-2 zeolite particles and refractory oxide binder essentially free of alumina in which the average aluminium concentration of the ZSM-48 and/or EU-2 zeolite particles is at least 1.3 times the aluminium concentration at the surface of the particles, processes for preparing such catalyst compositions and processes for converting hydrocarbon feedstock with the help of such compositions.

Abstract: A process of producing a zeotype material having a zeolite-type framework. The process includes providing a zeolite having a framework, dealuminating the zeolite to remove aluminum atoms therefrom to produce a dealuminated framework comprising a plurality of vacancy sites, contacting the dealuminated framework with dichloromethane and a precursor comprising heteroatoms, and then heating the dealuminated framework, the dichloromethane, and the precursor under reflux conditions to incorporate the heteroatoms into at least some of the plurality of vacancy sites in the dealuminated framework to produce a zeotype material having a zeolite-type framework comprising the heteroatoms. In addition, a process is provided for producing a stannosilicate comprising a zeolite-type framework comprising Sn heteroatoms incorporated therein which form Sn sites in the zeolite-type framework each having an open configuration or a closed configuration.

Abstract: According to one or more embodiments disclosed herein, a mesoporous zeolite may be made by a method comprising contacting an initial zeolite material with ammonium hexafluorosilicate to modify the framework of the initial zeolite material, and forming mesopores in the framework-modified zeolite material. The contacting may form a framework-modified zeolite material. The mesoporous zeolites may be incorporated into catalysts.

Abstract: A process for preparing a catalytic cracking catalyst, which process comprises: a molecular sieve is introduced into a gas-phase ultra-stabilization reactor, the molecular sieve is moved without the conveying of carrier gas from a molecular sieve inlet of the gas-phase ultra-stabilization reactor to a molecular sieve outlet of the gas-phase ultra-stabilization reactor, and the molecular sieve is contacted and reacted with a gaseous SiCl4 in the gas-phase ultra-stabilization reactor, the molecular sieve resulting from the contacting and the reacting is optionally washed, then mixed with a matrix and water into slurry, and shaped into particles.

Abstract: The present invention provides a novel high-silica zeolite having a high molar ration of a tetravalent element (Y) to a trivalent element (X) in terms of oxide. A zeolite, comprising at least a trivalent element X and a tetravalent element Y, wherein a molar ratio n=YO2/X2O3 in terms of oxide is 9.5 or more, and the zeolite comprises an RHO-type structure, or comprising at least a trivalent element X and a tetravalent element Y, wherein a molar ratio n=YO2/X2O3 in terms of oxide is 9.5 or more, and a characteristic X-ray diffraction pattern. This zeolite is produced by hydrothermal synthesis of a zeolite from an aqueous gel that is prepared by adding a mixed solution comprising a crown ether, an alkali, and water to a solution containing an aluminum atom material, and by then dropwise adding a liquid containing a silicon atom material.

Abstract: [Problem] To provide a strontium ion-exchanged clinoptilolite having excellent nitrogen-absorbing properties; and a method for producing the strontium ion-exchanged clinoptilolite. [Solution] Synthetic clinoptilolite having a strontium ion at an ion exchange site thereof is useful as a nitrogen adsorbent. The synthetic clinoptilolite can be produced by bringing a solution containing a strontium ion into contact with synthetic clinoptilolite under ambient pressure to cause ion exchange.

Abstract: The present invention relates to a metal silicoaluminophosphate molecular sieve MeAPSO with a RHO framework structure and a preparation method thereof. The metal silicoaluminophosphate molecular sieve is characterized in that: the metal atoms are at least one of vanadium, copper, molybdenum, zirconium, cobalt, manganese, magnesium, iron, nickel and zinc. The chemical composition of said metal silicoaluminophosphate molecular sieve in anhydrous state is expressed as: mR.nMe.(SixAlyPz)O2, where R represents template existed in molecular sieve micropores, m is the molar number of said template per one molar of (SixAlyPz)O2, m=0.1˜0.5; Me represents metal atom entering into said metal silicoaluminophosphate molecular sieve framework, n is the molar number of Me per one molar of (SixAlyPz)O2, n=0.001˜0.30. Said metal silicoaluminophosphate molecular sieve has ion exchange performance and adsorption performance.

Abstract: The present invention provides a modified Y-type molecular sieve, characterized by having a unit cell size of 2.420-2.440 nm; as percent by weight of the modified Y-type molecular sieve, a phosphorus content of 0.05-6%, a RE2O3 content of 0.03-10%, and an alumina content of less than 22%; and a specific hydroxyl nest concentration of less than 0.35 mmol/g and more than 0.05 mmol/g, said ? ? specific ? ? hydroxyl ? ? nest ? ? concentration = [ ( M 500 ? ° ? ? C . - M 200 ? ° ? ? C . ) - ( 17 / 9 ) × ( M 800 ? ° ? ? C . - M 500 ? ° ? ? C . ) ] × 1000 36 × ( 1 - M 200 ? ° ? ? C . ) × C ? ( Unit ? : ? mmol ? / ? g ) wherein M200° C., M500° C. and M800° C. respectively represent the weight loss percents of a sample measured at 200° C., 500° C. and 800° C., and C is the crystallinity of the sample. The modified Y-type molecular sieve has few defect in the crystal lattice.

Abstract: Processes described include reacting a fresh or spent catalyst, or sorbent, with a solution containing an extracting agent (such as an acid or a base). Preferably, the catalyst contains both alumina and a molecular sieve (or a sorbent), and the reaction is performed under relatively mild conditions such that the majority of the base material does not dissolve into the solution. Thus, the catalyst can be re-used, and in certain instances the catalyst performance even improves, with or without re-incorporating certain of the metals back into the catalyst. Additionally, metals contained in the catalyst, such as Na, Mg, Al, P, S, Cl, K, Ca, V, Fe, Ni, Cu, Zn, Sr, Zn Sb, Ba, La, Ce, Pr, Nd, Pb, or their equivalent oxides, can be removed from the catalyst. Some of the metals that are removed are relatively valuable (such as the rare earth elements of La, Ce, Pr and Nd).

Abstract: A titanium silicate variant named UPRM-5 was prepared using tetraethylammonium hydroxide as a structure-directing agent (SDA). Successful detemplation was achieved via ion exchange with NH4Cl. Effective functionalization was obtained after ion exchanging the detemplated material using SrCl2 and BaCl2. Adsorption of CO2 at 25° C. in Sr- and Ba-UPRM-5 materials activated at different temperatures. For low partial pressures, the observed CO2 adsorption capacities increased as follows: NH4-UPRM-5<Sr-UPRM-5<Ba-UPRM-5. Both the Sr- and Ba-UPRM-5 materials exhibited outstanding selectivity for CO2 over CH4, N2 and O2.

Abstract: A zeolite membrane production apparatus is provided having a reaction container having a support insertion opening for insertion of tubular supports and which houses a reaction solution for formation of zeolite membranes on the surfaces of the supports, a heating means for heating the reaction solution through the reaction container, and a supporting apparatus provided on the reaction container in a freely detachable manner and which supports a plurality of the supports. The inner wall surface of the reaction container has two mutually parallel flat surfaces, the supporting apparatus has a plurality of supporting sections that anchor one end of each of the plurality of supports, and the plurality of supporting sections are provided in the supporting apparatus such that when the supporting apparatus is set in the reaction container, each of the plurality of supports is disposed between the two flat surfaces and parallel to the two flat surfaces.

Abstract: A family of crystalline aluminosilicate zeolites designated UZM-5HS and derived from UZM-5 have been synthesized. The aluminum content of the UZM-5HS is lower than that of the starting UZM-5 thus changing its ion exchange capacity and acidity. These UZM-5HS are represented by the empirical formula: M1an+Al(1?x)ExSiy?Oz? and are prepared by treatments such as acid extraction and AFS treatments.

Abstract: The invention, in one embodiment, is a method for preparing crystalline zeolites by (a) contacting a calcined essentially aluminum free borosilicate zeolite with an aqueous acid solution, thereby producing an at least partially deboronated zeolite; (b) contacting said at least partially deboronated zeolite with a solution selected from the group consisting of an aqueous aluminum salt solution, thereby producing an aluminosilicate zeolite; an aqueous gallium salt solution, thereby producing a gallosilicate zeolite; an aqueous iron salt solution, thereby producing a ferrosilicate zeolite; and mixtures thereof; and (c) where the contacting in step (b) occurs at a pH of not greater than about 3.5.

Abstract: A family of crystalline aluminosilicate zeolites designated UZM-5HS and derived from UZM-5 have been synthesized. The aluminum content of the UZM-5HS is lower than that of the starting UZM-5 thus changing its ion exchange capacity and acidity.

Abstract: Zeolites of type A wherein all the cationic sites of which occupied by sodium, calcium and/or magnesium, potassium and hydronium cations, which exhibit the advantage of having a water adsorption capacity≧23%, which do not adsorb and therefore cannot desorb nitrogen, and which, incorporated in polyurethane (PU) resins, make it possible to increase the potlife of the PU formulations in which they are incorporated. Such zeolites are prepared by a process comprising bringing into contact an aqueous suspension of zeolite 3A, 4A or 5A, an aqueous solution of calcium or potassium salt(s) or solutions of calcium and potassium salt(s), and an acid solution, simultaneously or otherwise and in any order; and in then filtering off and washing the solid obtained, and then drying and activating the zeolite.

Abstract: Thin films for use as dielectric in semiconductor and other devices are prepared from silica zeolites, preferably pure silica zeolites such as pure-silica MFI. The films have low k values, generally below about 2.7, ranging downwards to k values below 2.2. The films have relatively uniform pore distribution, good mechanical strength and adhesion, are relatively little affected by moisture, and are thermally stable. The films may be produced from a starting zeolite synthesis or precursor composition containing a silica source and an organic zeolite structure-directing agent such as a quaternary ammonium hydroxide. In one process the films are produced from the synthesis composition by in-situ crystallization on a substrate. In another process, the films are produced by spin-coating, either through production of a suspension of zeolite crystals followed by redispersion or by using an excess of the alkanol produced in preparing the synthesis composition.

Abstract: The present invention relates to a titanium-silicalite (TS-1) molecular sieve and the method for preparation of the same, wherein each crystallite of said titanium-silicalite molecular sieve has a hollow cavity with a radial length of 5-300 nm. The benzene adsorption capacity of the molecular sieve determined at 25° C. and P/P0=0.10 for 1 hour is at least 70 mg/g; and the method for preparation of said molecular sieve comprises an acid-treatment and then an organic-base treatment of the synthesized TS-1 molecular sieve, or only an organic-base treatment. The TS-1 molecular sieve of the present invention has a relatively high reactivity and activity stability in the catalytic oxidation.

Abstract: The present invention provides a method for preparing a zeolite having lattice substituted heteroatoms. The method includes: (a) contacting a calcined borosilicate zeolite with an acid, thereby producing an at least partially deboronated zeolite; and (b) contacting the at least partially deboronated zeolite with a salt-containing aqueous solution comprising one or more salts selected from the group consisting of aluminum salt, gallium salt, and iron salt, thereby producing a silicate or borosilicate zeolite having a lattice comprising aluminum atoms; gallium atoms, iron atoms or a combination thereof. Step (b) is conducted at a pH of about 3.5 or less. Preferably, step (a), step (b) or both are conducted at a temperature of from about ambient temperature to about 300° C., preferably, under stirring/tumbling.

Abstract: An aqueous solution with a pH of greater than 5, preferably of at least 6.5, can be used in an ion-exchange process, in particular a process for the manufacture of a zeolite. This aqueous solution comprises metal cations, such as zinc, and an agent for complexing the metal cations, such as citric acid or a salt of this acid. The proportion of free cations in solution represents from 0.1% to 99%, preferably from 1 to 30%, of the total amount of the metal in the solution. The invention also relates to a process for the manufacture of zeolites X or A employing such an aqueous solution and the use of the zeolites thus obtained for separating, purifying or converting one or more constituents of a gas stream, such as air, synthesis gases or hydrocarbons, in particular olefins, by employing an adsorption process, in particular a PSA, VSA or TSA.

Abstract: A method is provided for preparing fully lattice-inserted titanium zeolites by post-synthesis processing of the synthetic zeolite optionally containing titanium with an inorganic acid, wherein the post-synthesis processing comprises processing the zeolite in the presence of at least one titanium source with a solution containing at least one oxidizing inorganic acid having a higher redox potential than an acidic tetravalent titanium solution. The invention is also directed to the use of the zeolites.

Abstract: A method for preparing novel zeolitic catalyst compositions having a high Si/Al ratio and a crystallinity of at least about 70%. The method involves cation exchanging an as synthesized faujasite material having an Si/Al greater than about 4 with a component selected from the group consisting of ammonium ions and mineral acids, then steam calcining said cation exchanged faujasite in a single steam calcination step at a temperature from about 900.degree. F. to about 1 500.degree. F.

Abstract: A process of modifying the porosity of an aluminosilicate or silica whose porosity is not amenable to modification by acid extraction. The process involves contacting said aluminosilicate or silica with an alkali aluminate, and then extracting the aluminate-treated material with an extraction agent so as to form the porosity-modified aluminosilicate or silica. The process is applicable to zeolites which are unreactive under acid extraction conditions, e.g. ferrierite, and applicable to zeolites which are structurally unstable under acid extraction conditions, such as the mineral bikitaite. Mesoporous compositions are disclosed, including a mesoporous ferrierite and a mesoporous zeolite DCM-3.

Abstract: The present invention relates to a dealuminated IM-5 zeolite and to any catalyst comprising that zeolite which is at least partially in its acid form. The invention also relates to the preparation of the catalyst and to the catalyst. Finally, the invention relates to the use of the zeolite in a hydrocarbon conversion process.

Abstract: Mild acid treatment of zeolite 3A molecular sieve to modify the pH of the surface of the molecular sieve to a pH ranging between 9.5 and 11 was found to significantly minimize the effect of the zeolite 3A on the pot life of non-foamed polyurethanes. Increases in pot life over untreated zeolite 3A molecular sieve were dramatic (about 400%) with less than 5% reduction in water adsorption capacity.

Abstract: Molecular sieve compositions are prepared by extracting aluminum and substituting chromium and/or tin for extracted aluminum to give molecular sieve products containing framework chromium and/or tin atoms. The process of preparing the chromium and/or tin-containing molecular sieves involves contacting a starting molecular sieve with a solution or slurry of at least one of a fluoro salt of chromium or a fluoro salt of tin under effective process conditions to provide for aluminum extraction and substitution of chromium and/or tin.

Abstract: Disclosed is a method for treating synthetic zeolite to remove organic template material therefrom and concurrently therewith effect dealumination of the zeolite. The method comprises the steps of providing a body of synthetic zeolite containing organic template material, the zeolite having an SiO.sub.2 /Al.sub.2 O.sub.3 ratio of at least 7:1. The body is treated with a solution comprised of an alcohol selected from methanol, ethanol and propanol and an acid selected from hydrochloric, nitric and sulfuric acid at a temperature and time to remove the organic template material therefrom and to effect dealumination thereof to provide a treated zeolite product. The treated product is washed to remove residual solution and then dried to provide a synthetic zeolite product containing a reduced amount of organic template material and having an SiO.sub.2 /Al.sub.2 O.sub.3 ratio of at least 7:1.

Abstract: Molecular sieve compositions are prepared by extracting aluminum and substituting chromium and/or tin for extracted aluminum to give molecular sieve products containing framework chromium and/or tin atoms. The process of preparing the chromium and/or tin-containing molecular sieves involves contacting a starting molecular sieve with a solution or slurry of at least one of a fluoro salt of chromium or a fluoro salt of tin under effective process conditions to provide for aluminum extraction and substitution of chromium and/or tin.

Abstract: A process for the manufacture of a modified aluminosilicate zeolite is disclosed which includes contacting a starting zeolite in an aqueous phase with a dealuminating agent at a pH value of lower than 4 in the presence of a soluble silica. A novel zeolite composition is also disclosed which has increased acid and thermal stability.

Abstract: A process is provided for dealuminization of zeolites having large pores, the diameter of the aperture of the pores being greater than or equal to about 0.7 nm and the silica/alumina ratio greater than or equal to about 6. The process comprises acid leaching of the raw zeolite containing the structuring agent.The dealuminized zeolites obtained are useful as catalysts for the transformation of hydrocarbons and as selective organophilic adsorbents.

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: Zeolites containing gallium in their crystalline framework structure are prepared by treating a zeolite material with a reagent capable of replacing a part of the aluminum of the framework structure of the zeolite material with the gallium. The method is especially applicable for the preparation of faujasitic materials of the formulaM.sub.(x+y/n) [ALO.sub.2 ].sub.x [GaO.sub.2 ].sub.y [SiO.sub.2 ].sub.zwherein:M is a charge balancing ion and n is the oxidation state thereof,x, y and z are the respective numbers of tetrahedra represented respectively by AlO.sub.2, GaO.sub.2 and SiO.sub.2,x+y+z=192, for a said faujasitic structure with no missing tetrahedra,x+y is from 0.1 to 71 inclusive, andy is from 0.01 to 60 inclusive.

Abstract: An aqueous suspension of zeolite NaY is treated in with sodium hydroxide solution. The treated zeolite NaY is subsequently dealuminized with silicon tetrachloride.

Abstract: Lithium/alkaline earth metal X zeolites in which the lithium:alkaline earth metal equivalent ratio is from about 95:5 to about 50:50 and lithium/alkaline earth metal A zeolites in which the lithium:alkaline earth metal equivalent ratio is from about 10:90 to about 70:30 are useful for separating oxygen and nitrogen from mixtures because they combine high adsorption capacity with high thermal stability.