Abstract: An MCM-22 family molecular sieve having an X-ray diffraction pattern of the as-synthesized MCM-22 family molecular sieve including d-spacing maxima at 12.4±0.25, 3.57±0.07 and 3.42±0.07 Angstroms and at least one peak between 26.6° and 29° (2?). The peak between 26.6° to 29° (2?) has a two theta (2?) of about 26.9°. A method of manufacturing an MCM-22 family molecular sieve, said method comprising the steps of (a) combining at least one silicon source, at least one source of alkali metal hydroxide, at least one directing-agent (R), water, and optionally one aluminum source, to form a mixture having the following mole composition: Si:Al2=10 to infinity H2O:Si=1 to 20 OH?:Si=0.001 to 2 M+:Si=0.001 to 2 R:Si=0.001 to 0.34 wherein M is an alkali metal; (b) treating said mixture at crystallization conditions for less than 72 hr to form a treated mixture having said MCM-22 family molecular sieve, wherein said crystallization conditions comprises a temperature range from about 160° C. to about 250° C.

Abstract: A method of preparing a crystalline molecular sieve is provided, which method comprises (a) providing a reaction mixture comprising at least one source of ions of tetravalent element Y, at least one source of alkali metal hydroxide, water, optionally at least one seed crystal, and optionally at least one source of ions of trivalent element X, said reaction mixture having the following mole composition: Y:X2=10 to infinity OH?:Y=0.001 to 2 M+:Y=0.001 to 2 wherein M is an alkali metal and the amount of water is at least sufficient to permit extrusion of said reaction mixture; (b) extruding said reaction mixture to form a pre-formed extrudate; and (c) crystallizing said pre-formed extrudate under vapor phase conditions in a reactor to form said crystalline molecular sieve whereby excess alkali metal hydroxide is removed from the pre-formed extrudate during crystallization. The crystalline molecular sieve product is useful as catalyst in hydrocarbon conversion processes.

Abstract: A method of crystallizing a crystalline molecular sieve having a pore size in the range of from about 2 to about 19 ?, said method comprising the steps of (a) providing a mixture comprising at least one source of ions of tetravalent element (Y), at least one hydroxide source (OH?), and water, said mixture having a solid-content in the range of from about 15 wt. % to about 50 wt. %; and (b) treating said mixture to form the desired crystalline molecular sieve with stirring at crystallization conditions sufficient to obtain a weight hourly throughput from about 0.005 to about 1 hr?1, wherein said crystallization conditions comprise a temperature in the range of from about 200° C. to about 500° C. and a crystallization time less than 100 hr.

Abstract: The invention relates to a crystalline molecular sieve composition which is obtainable by crystallizing a pre-formed extrudate mixture in a reactor and, during crystallization, removing excess alkali metal hydroxide from the pre-formed extrudate. The pre-formed extrudate mixture comprises at least one source of ions of tetravalent element Y, at least one source of alkali metal hydroxide, water, optionally at least one seed crystal, and optionally at least one source of ions of trivalent element X. The reaction mixture has the following mole composition: Y:X2=10 to infinity; OH?:Y=0.001 to 2; and M+:Y=0.001 to 2; wherein M is an alkali metal. The amount of water in the mixture is at least sufficient to permit extrusion of said reaction mixture.

Abstract: A method of making a crystalline molecular sieve of MFS framework type, said method comprising the steps of (a) adding at least one source of ions of tetravalent element (Y), at least one source of ions of trivalent element (X), at least one hydroxide source (OH?), at least one structure-directing-agent (R), at least one seed source (Seed), and water (H2O) to form a mixture having the following mole composition (expressed in term of oxide): YO2:(n)X2O3:(x)OH?:(y)R:(z)H2O+(m)Seed wherein the m is in the range of from about 10 wtppm to about 2 wt. % (based on total weight of the synthesis mixture), the n is in the range of from about 0.005 to 0.05, the x is in the range of from about 0.01 to about 0.3, the y is in the range of from about 0.

Abstract: A microparticle retention aid for use in papermaking containing a high performance purified natural zeolite pigment is disclosed. Use of the pigment facilitates manufacture of papers with improved quality and economics. When used as filler, the novel zeolite pigment is readily retained and eliminates print-through in uncoated papers. The novel zeolite pigment is low in abrasion and provides improved coefficient of friction.

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: A process for synthesizing a variety of molecular sieves has been developed. The process involves forming a reaction mixture comprising reactive sources of the framework elements plus at least one templating agent, reacting the mixture to at least partially crystallize the molecular sieve and provide 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: The invention relates to a method for the production of n-alkanes from mineral oil fractions and fractions from thermal or catalytic conversion plants, containing cyclic alkanes, alkenes, cyclic alkenes and/or aromatics. The invention further relates to a catalyst for carrying out said method.

Abstract: The present invention provides a method for manufacturing a zeolite comprising following steps of: (1): calcining crystals obtained by hydrothermal synthesis reaction of a silicon compound; (2): contact treating a calcined product obtained by the step (1) with an aqueous solution including an amine and/or a quaternary ammonium compound; (3): calcining a treated product obtained by the step (2); and (4): contact treating the calcined product obtained by the step (3) with an aqueous solution including ammonia and/or an ammonium salt. According to the present invention, a method is also provided wherein ?-caprolactam is manufactured by Beckmann rearrangement reaction of cyclohexanone oxime in a gaseous phase in the presence of the zeolite manufactured by the above-described method.

Abstract: A process for extracting and purifying naturally occurring zeolite from ores in the presence of other mineral phases by using mechanical dispersion and differential suspension to remove a majority of the clay content of the ore. The process continues by removal of contaminants with a higher mass to surface area ratio than that of the desired zeolite product by employing the properties of demineralized water in combination with a countercurrent flow separation column. No chemical flocculating or flotation agents need be employed in the process.

Abstract: A process for the preparation of a metal-doped pentasil-type zeolite comprising the steps of: a) preparing an aqueous precursor mixture comprising a silicon source and an aluminum source, at least one of these sources being doped with a rare earth metal or a transition metal of Groups Vb–VIIIb, Ib, or IIb of the Periodic System, and b) thermally treating the precursor mixture to form a metal-doped pentasil-type zeolite. With this process, metal-doped pentasil-type zeolites can be prepared while the risk of precipitation of the dopant as a separate phase is minimized.

Abstract: An FCC catalyst which not only deactivates catalyst poison metals, such as nickel, vanadium and the like, in feedstock oils, inhibits the generation of hydrogen or coke, has excellent cracking activity and bottom oil-treating ability, and can yield a gasoline and LCO fraction in high yields, but also retains the performances on a high level over long and has an improved catalyst life; and an FCC method using the catalyst. The FCC catalyst has a compound of a bivalent metal or of bivalent and trivalent metals showing an XRD pattern of a carbonate of the bivalent metal; an inorganic oxide matrix and the compound dispersed therein; or an inorganic oxide matrix and the compound dispersed therein together with a crystalline aluminosilicate zeolite, and relates to an FCC method in which at least one of the catalysts are used in combination with an FCC catalyst obtained by evenly dispersing a crystalline aluminosilicate zeolite in an inorganic oxide matrix.

Abstract: Described is a supported zeolite membrane that consists of a zeolite/substrate composite layer that exhibits, in the n-butane/isobutane separation, a permeance of n-butane of at least 6.10−7 mol/m2.s.Pa and a selectivity of at least 250 at the temperature of 180° C. Said zeolite/substrate composite layer is thin and continuous. This membrane is used in processes for gas separation, vapor separation and liquid separation.

Abstract: A zeolite crystalline solid, designated IM-9, having an X ray diffraction diagram according to FIG. 1, 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. The solid is useable, for example as an adsorbent or catalyst.

Abstract: The present invention relates to zeolites X, most of the exchangeable sites of which are occupied by lithium and di- and/or trivalent cations, having an improved thermal stability and an improved crystallinity with respect to zeolites of the prior art with the same degree of exchange of lithium and of di- and/or trivalent cations. The zeolites of the present invention are particularly effective as adsorbents of the nitrogen present in various gas mixtures and are well suited to the noncryogenic separation of the gases of the air.

Abstract: The present invention relates to new crystalline, molecular sieve CIT-6 that has the topology of zeolite beta. CIT-6 can be in an all-silica form, in a form wherein zinc is in the crystal framework, or a form containing silicon oxide and non-silicon oxides. In a preferred embodiment, CIT-6 has a crystal size of less than one micron and a water adsorption capacity of less than 0.05 g/g.

Abstract: The present invention relates to the use of a catalytic system comprising a metal of group VIII, a metal of group VI, a metal oxide as carrier and suitable quantities of a component selected from a zeolite of the FER type, phosphorous, and a mixture thereof, in upgrading of hydrocarbons boiling in the naphtha range containing sulfur impurities, namely in hydrodesulfurization with contemporaneous skeleton isomerization of olefins contained in said hydrocarbons and/or with reduction of olefins hydrogenation, carried out in a single step.

Abstract: A catalyst for reducing the nitrous oxide content in gas, which operates at relatively low temperatures, the activity of which is relatively insensitive to the presence of water vapor and which is highly resistant to hydrothermal degradation, is prepared from ferrierite exchanged with iron. Application to the treatment of gases with a low N2O content, such as gases resulting from plants for the manufacture of nitric acid, and of gases with a high N2O content, which are emitted during oxidations of organic compounds by nitric acid.

Abstract: A catalyst, a process for making the catalyst and a process for using the catalyst in aromatization of alkanes to aromatics, specifically, aromatization of alkanes having two to six carbon atoms per molecule, such as propane, to aromatics, such as benzene, toluene and xylene. The catalyst is an aluminum-silicon-germanium zeolite on which platinum has been deposited. Germanium is in the framework of the crystalline zeolite. Platinum is deposited on the zeolite. The catalyst may be supported on magnesia, alumina, titania, zirconia, thoria, silica, boria or mixtures thereof. The catalyst may contain a sulfur compound on the surface of the catalyst. The sulfur compound may be added to the catalyst in a pretreatment process or introduced with the hydrocarbon feed to contact the catalyst during the aromatization process.

Abstract: A process for reversible sorption of sulfur trioxide onto a sorbent comprising a) contacting from about 15% to 100% sulfur trioxide with the sorbent under anhydrous conditions at a temperature of from about 35° C. to about 150° C. thereby sorbing the sulfur trioxide onto the sorbent, b) desorbing sulfur trioxide from the sorbent at a temperature of from about 150° C. to about 350° C. at about atmospheric pressure, or under a vacuum pressure, and c) recycling said sorbent by continuously repeating steps a) and b), wherein said sorbent consists essentially of silica or zeolite having a silicon to aluminum ratio in the ranges of from about 1 to about 4.4 or greater than about 5.1, and having a pore size of at least 0.5 nm is disclosed.

Abstract: A catalytic material includes microporous zeolites supported on a mesoporous inorganic oxide support. The microporous zeolite can include zeolite Beta, zeolite Y (including “ultra stable Y”—USY), mordenite, Zeolite L, ZSM-5, ZSM-11, ZSM-12, ZSM-20, Theta-1, ZSM-23, ZSM-34, ZSM-35, ZSM-48, SSZ-32, PSH-3, MCM-22, MCM-49, MCM-56, ITQ-1, ITQ-2, ITQ-4, ITQ-21, SAPO-5, SAPO-11, SAPO-37, Breck-6, ALPO4-5, etc. The mesoporous inorganic oxide can be e.g., silica or silicate. The catalytic material can be further modified by introducing some metals e.g. aluminum, titanium, molybdenum, nickel, cobalt, iron, tungsten, palladium and platinum. It can be used as catalysts for acylation, alkylation, dimerization, oligomerization, polymerization, hydrogenation, dehydrogenation, aromatization, isomerization, hydrotreating, catalytic cracking and hydrocracking reactions.

Abstract: The present invention relates to new crystalline molecular sieve SSZ-63 prepared using N-cyclodecyl-N-methyl-pyrrolidinium cation as a structure-directing agent, methods for synthesizing SSZ-63 and processes employing SSZ-63 in a catalyst.

Abstract: A process for the preparation of a metal-doped pentasil-type zeolite comprising the steps of:

Abstract: A method for capturing specified materials which includes contacting a microporous material with a hydrostatic fluid having at least one specified material carried therein, under pressure which structurally distorts the lattice sufficiently to permit entry of the at least one specified material. The microporous material is capable of undergoing a temporary structural distortion which alters resting lattice dimensions under increased ambient pressure and at least partially returning to rest lattice dimensions when returned to ambient pressure. The pressure of the fluid is then reduced to permit return to at least partial resting lattice dimension while the at least one specified material is therein. By this method, at least one specified material is captured in the microporous material to form a modified microporous material.

Abstract: The present invention relates to a process for the preparation of doped pentasil-type zeolite, which process comprises the steps of:

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: Built laundry detergent compositions, especially granules, powders, tablets or syndet bars for domestic use, wherein the builder comprises at least in part a hybrid crystalline aluminosilicate having occluded silicate, carbonate, sulfate, phosphate, borate, nitrate, nitrite, Na2O, or mixtures thereof; and wherein the hybrid can further be chemically or physically surface-modified, combined with other builders, or processed in particular ways; and wherein the hybrid is coformulated with detergent adjuncts selected to improve the compositions, especially certain surfactants, particularly mid-chain branched types; certain bleach systems, especially those having bleach catalysts; and certain enzymes or other adjuncts.

Abstract: A structure directing agent is removed from a microporous solid at a temperature below the temperature that would cause the structure directing agent to decompose by cleaving the structure directing agent within the pores of the microporous solid, at a temperature below the temperature that would cause the structure directing agent to decompose, into two or more fragments and removing the fragments from the pores of the microporous solid at a temperature below the temperature that would cause the structure directing agent or its fragments to decompose.

Abstract: The present invention relates to a process for treating a solid material containing at least one zeolite and being at least partly crystalline or treating a shaped body obtained from said solid material wherein said solid material or shaped body is brought in contact with a composition containing water after at least one of the following steps of an integrated process for producing a solid material or a shaped body containing at least one zeolite: (i) after step (II) of separating the at least partly crystalline solid material from its mother liquor or (ii) after step (S) of shaping said solid material into a shaped body or (iii) after a step (C) of calcining said solid material or said shaped body. The present invention furthermore relates to the solid material obtainable by the inventive process and the shaped body obtainable by the inventive process.

Abstract: The present invention provides a zero emission type method for effective use permitting economical and effective manufacture of zeolite effectively applicable in various sectors of industry by using silicon-containing waste comprising at least one of exhaust gas treatment sludge mainly comprising SiO2 discharged from an optical film manufacturing plant, optical fiber refuse and preform refuse, and aluminum-containing waste comprising at least one of aluminum dross discharged from an aluminum-related manufacturing plant, aluminum dust collection ashes, sludge mainly comprising aluminum hydroxide, cleaning waste liquid of aluminum or an alloy thereof, scrap of metal aluminum or an alloy thereof, and alumina scrap.

Abstract: A process for extracting and purifying naturally occurring zeolite from ores in the presence of other mineral phases by using mechanical dispersion and differential suspension to remove a majority of the clay content of the ore. The process continues by removal of contaminants with a higher mass to surface area ratio than that of the desired zeolite product by employing the properties of demineralized water in combination with a countercurrent flow separation column. No chemical flocculating or flotation agents are employed in the process. The process separates the particulate compound by using the separation effect of an electrical double layer which forms when the mixture is hydrated in a low electrolyte medium.

Abstract: A composition comprising an incineration ash or an aluminosilicate as a raw material is added with an aqueous alkaline solution from an alkali storage tank (3) and heated. The resultant pre-mixture is then mixed and kneaded by a kneader (4) to prepare a kneaded mixture (19) in the form of a slurry or mud. The kneaded mixture (19) is moved continuously and irradiated directly with an electromagnetic wave of 300 MHz to 30 GHz in an electromagnetic wave irradiation unit (21), to thereby convert it to zeolite. The zeolite thus formed is cleaned by means of a cleaning machine (7) and dried with a rotary steam dryer (9). This method can be employed for producing an artificial zeolite with a reduced amount of alkali used and discharged, at a lower energy expenditure, and a reduced time for production.

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: 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: This invention relates to a new synthetic porous crystalline material, designated MCM-71, a method 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 3-dimensional channel system comprising generally straight, highly elliptical channels, each of which is defined by 10-membered rings of tetrahedrally coordinated atoms, intersecting with sinusoidal channels, each of which is defined by 8-membered rings of tetrahedrally coordinated atoms.

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: An in-extrudate reaction mixture to be effectively crystallized is effectively crystallized to produce zeolitic or non-zeolitic molecular sieves. The reaction mixture is heated within a slowly rotating, double-walled reactor vessel wherein a heated medium is conducted within a space formed between the double walls of the vessel. Thus, the reaction mixture is contacted by a uniformly heated wall while being gently tumbled at low speed. The tumbling action serves to uniformly distribute the heat within the reaction mixture without subjecting the mixture to such shearing that could damage shaped particles. A relatively high quantity of reaction mixture can be handled in that way to maximize the production volumes and reduce production costs.

Abstract: A high performance purified natural zeolite pigment composition for use in papermaking and paper coating is disclosed. Use of the pigment facilitates manufacture of coated ink jet and digital printing papers with improved quality and economics. The novel zeolite pigment composition can also be used as a supplementary pigment to improve the properties of coated paper and paperboard for flexographic and water-based gravure printing. When used as filler, the novel zeolite pigment composition is readily retained and eliminates print-through in uncoated papers. The novel zeolite pigment is low in abrasion and provides improved coefficient of friction. The novel zeolite pigment is also useful as a microparticulate retention aid in papermaking and as an additive to improve the performance of deinking processes.

Abstract: The invention relates to absorbents for water and aqueous liquids, which absorbents are based on water-swellable, yet water-insoluble polymers wherein cyclodextrin or cyclodextrin derivatives and zeolites high in silicon have been incorporated tonically, covalently and/or as a result of mechanical inclusion.

Abstract: In SAPO manufacture, handling of the synthesis mixture is facilitated by providing an initial aluminium-containing aqueous slurry with an H2O:Al2O3 weight ratio of 3:1 to 8:1.

Abstract: A method for making a zeolite includes impregnating a porous inorganic oxide with a liquid solution containing an inorganic micropore-forming directing agent. The amount of liquid solution is no more than about 100% of the pore volume of the porous inorganic oxide, and the concentration of the directing agent in the liquid solution ranges from about 21% to about 60% by weight. The impregnated amorphous inorganic oxide is heated at a synthesis temperature of from about 50° C. to about 150° C. for a duration of time sufficient to form a zeolite-containing product. The method herein is advantageous for the transformation of a mesoporous or macroporous amorphous inorganic material to a composite structure containing the original mesopores or macropores, but wherein at least some of the porous inorganic oxide material is converted to nanocrystalline zeolite, such as zeolite Y.

Abstract: A process is provided for the preparation of artificial zeolite comprising the steps of (a) mixing x kilograms of incineration ash or any other aluminosilicate-containing substance with y liters of an aqueous solution of alkali metalhydroxide having a concentration of 1 N or higher in a proportion, y/x, of from about 0.1 to about 1.5 (liter/kg) to prepare a slurry, and (b) heating the slurry to cause a zeolite forming reaction. Water is continuously or intermittently removed by evaporation so that a decrease in a concentration of alkali which would otherwise naturally occur during the reaction is at least suppressed to thereby facilitate the reaction.

Abstract: Low silicon sodium X zeolite containing little or no sodium A zeolite as by-product, is prepared by direct synthesis from sodium ion-containing hydrogels, the crystallization step being carried out by maintaining the hydrogels at a temperature below about 70° C., and preferably in the range of about 50 to about 70° C. for the duration of the crystallization step. Preferably, the ratios of components in the solutions used to make the hydrogel are such that in the hydrogel the silica/alumina molar ratio will be in the range of about 2.25:1 to about 2.4:1; the sodium oxide to silica molar ratio will be in the range 1.6:1 to about 1.9:1; and the water to sodium oxide molar ratio will be greater than about 60:1.

Abstract: The present invention provides the adsorbent which adsorbs the aldehyde efficiently for a long period. The present invention also includes an adsorption device, an article and a method using the same. The adsorbent of the invention comprises a zeolite, wherein the zeolite has NH4+ as ionic species; a crystal structure of ZSM-5 or ferrierite; a molar ratio of SiO2/Al2O3 from 30 to 190; and the zeolite retains a quarternary ammonium salt which adsorbs the aldehyde with the reaction of the aldehyde. In the case of a formaldehyde, the zeolite has NH4+ as ionic species.

Abstract: A process and a composite for removing toxic cations and anions from blood or dialysate is disclosed. The process involves contacting blood or dialysate with a shaped ion exchange composite to remove ammonium and phosphate ions. The composite is a mixture of an anion exchange composition such as zirconia and a microporous cation exchange composition formed into a shaped article and optionally containing a binder such as hydrous zirconium oxide. The microporous cation exchangers are represented by the following empirical formula.

Abstract: The present invention relates to the manufacture of novel molecular sieve adsorbents for the separation of a gaseous mixture of oxygen, nitrogen and argon. The adsorbent is useful for the separation of oxygen and/or nitrogen from air. More specifically, the invention relates to the manufacture of a molecular sieve adsorbent, which is selective towards nitrogen from its gaseous mixture with oxygen and/or argon and argon from its gaseous mixture with oxygen.

Abstract: The invention involves a process for production of macrostructures of a microporous material. The process is characterized by the fact that seeds formed in or introduced by ion exchange or adsorption to a porous organic ion exchanger with the desired size, shape and porosity are made to grow and form a continuous structure by further deposition of inorganic material from a synthesis solution under hydrothermal conditions. The organic ion exchanger can be eliminated by chemical destruction or dissolution and, in so doing, leaves behind an inorganic microporous structure with the size and shape of the employed organic ion exchanger.

Abstract: The invention relates to a method for applying a non-permeable, ceramic layer of a thickness of not more than about 100 &mgr;m to a ceramic or metallic body by applying a solution of one or more elastomers, which elastomers contain substantially not exclusively sulfur, carbon, hydrogen and oxygen, optionally drying, and pyrolyzing to form a porous layer and subsequently sintering at increased temperature to form a non-permeable ceramic layer.

Abstract: Patent of invention “PROCESS FOR METERING HYDROGEN PERMEATED IN A METALLURGICAL STRUCTURE, AND APPARATUS THEREOF”, refers to a process for metering permeated hydrogen flow in machines, equipment, piping, or other metallic apparatus, used in the oil industry, refineries, chemical industries, petrochemical industries, units for production, pumping, transport, and storage of petroleum and gas, tanks, machines, and equipment that work with hydrogen, or chemicals that can generate hydrogen, and nuclear industries, through a sensor that uses the properties of a couple of dissimilar materials, in construction and installation that are suitable to measure electrical values between a metering couple and a reference couple. The measured value is a function of the flow rate of hydrogen that permeates the metallic surface under monitoring.