Abstract: A zeolite-containing fixed bed catalyst is formed by pre-shaping a mixture of a reactive aluminum-containing component and a matrix component into pre-shaped particles, and contacting the pre-shaped particles with a reactive liquid containing a silicate for a sufficient time and temperature to form an in-situ zeolite within the pre-shaped particles. The contacting of the pre-shaped particles and the liquid is achieved such that there is relative movement between the pre-shaped particles and the liquid.

Abstract: The present invention relate to a binderless molecular sieve catalyst and a process for preparing the same, which are mainly useful for solving the problems of the current catalysts, such as lower activity, less pore volume and worse diffusivity. The present invention relates to a novel binderless molecular sieve catalyst, comprising, based on the weight of the catalyst, 90-100 wt. % of a molecular sieve, 0-10 wt. % of a binder, and 0-10 wt. % of an anti-wear agent, wherein said catalyst has a pore volume of 0.1-0.5 ml/g, an average pore diameter of 50-100 nm, and a porosity of 20-40%; the anti-wear agent is selected from the rod or needle-like inorganic materials having a length/diameter ratio of 2-20. Said catalyst has the advantages of higher activity, greater pore volume, larger average pore diameter and porosity, and better diffusivity, and well solves said problems and can be used for the industrial preparation of binderless molecular sieve catalysts.

Abstract: This invention is directed to hydrocracking catalysts and hydrocracking processes employing a magnesium aluminosilicate clay. The magnesium aluminosilicate clay has a characteristic 29Si NMR spectrum. The magnesium aluminosilicate clay is the product of a series of specific reaction steps. Briefly, the magnesium aluminosilicate clay employed in the catalyst and process of the present invention is made by combining a silicon component, an aluminum component, and a magnesium component, under aqueous conditions and at an acidic pH, to form a first reaction mixture and subsequently the pH of the first reaction mixture is adjusted to greater than about 7.5 to form a second reaction mixture. The second reaction mixture is allowed to react under conditions sufficient to form the magnesium aluminosilicate clay. The resulting magnesium aluminosilicate clay combines high surface area and activity for use in hydrocracking catalysts and processes.

Abstract: Catalysts are disclosed comprising fibrous substrates having silica-containing fibers with diameters generally from about 1 to about 50 microns, which act effectively as “micro cylinders.” Such catalysts can dramatically improve physical surface area, for example per unit length of a reactor or reaction zone. At least a portion of the silica, originally present in the silica-containing fibers of a fibrous material used to form the fibrous substrate, is converted to a zeolite (e.g., having a SiO2/Al2O3 ratio of at least about 150) that remains deposited on these fibers. The fibrous substrates possess important properties, for example in terms of acidity, which are useful in hydroprocessing (e.g., hydrotreating or hydrocracking) applications.

Abstract: The invention concerns a method of making a catalyst adapted for isomerization of xylenes.

Abstract: A catalyst and process for synthesis of dimethyl ether from synthesis gas are disclosed. The catalyst and process allow dimethyl ether synthesis at low pressures (below 20 bars) at a conversion rate close to the expected equilibrium rate. The catalyst is a combination of a methanol synthesis catalyst and a methanol dehydration catalyst, wherein the dehydration catalyst is a mixture of dehydration agents which allow optimum production of dimethyl ether.

Abstract: Process for the preparation of a catalyst comprising the steps of (a) preparing a slurry comprising clay, zeolite, a sodium-free silica source, quasi-crystalline boehmite, and micro-crystalline boehmite, provided that the slurry does not comprise peptised quasi-crystalline boehmite, (b) adding a monovalent acid to the slurry, (c) adjusting the pH of the slurry to a value above 3, and (d) shaping the slurry to form particles. This process results in attrition resistant catalysts with a good accessibility.

Abstract: This invention provides a multi-aperture carbon granule air purificant and production method thereof, and belongs to the technical field of air purification. The air purificant is made from carbon powder, attapulgite, sepiolite, zeolite, cationic surfactant, pore-forming agent, and bamboo vinegar. The rational design that carbon powder (including plant carbon and activated carbon) of the air purificant mentioned above is treated with nano minerals, attapulgite, sepiolite, zeolite and so on, improves plant carbon adsorption capacity (over 5 folds) and activated carbon adsorption capacity (over 2 folds). Moreover it has additional bactericidal and antibacterial actions besides for the effects of cationic surfactant and bamboo vinegar. Compared with other adsorbents under current techniques, this air purificant still holds high adsorption capacity even at high temperature and low partical pressure of adsorbates, and maintains the function of plant carbon's releasing anion and far infrared at the meantime.

Abstract: A fluid catalytic cracking catalyst exhibiting reduced coke make comprises a zeolite cracking component in a matrix of gibbsite having a median particle size of not more than 0.4 microns and preferably not more than 0.3 microns. The zeolite cracking component will normally be a faujasite, with preference to zeolite Y in its various forms such as Y, HY, REY, REHY, USY, REUSY and secondary zeolite additives may be present, including ZSM-5.

Abstract: A catalyst composition that has superior attrition performance and a method that produces said catalyst composition to be used for fluid catalytic cracking processes to convert a heavy hydrocarbon fraction into mainly liquid fuels, particularly gasoline and light olefins. The catalyst composition has a moisture level or loss on ignition below 12 wt % and attrition rate below 3 wt. %/hr.

Abstract: The present invention relates to sulphur reduction catalyst additive composition comprising an inorganic porous support incorporated with metals; an alumino silicate or zeolite component; an alumina component and clay. More particularly the present invention relates to sulphur reduction catalyst additive composition comprising refinery spent catalyst as support. The primary sulphur reduction catalyst additive component of the catalyst composition contains metals of Period III or IV of the Periodic Table, preferably Zinc or Magnesium or combination thereof or one of the transition metals along with other metals.

Abstract: An alkaline-earth metal compound-containing zeolite catalyst composed of a composite material comprising at least a first component, a second component, and a third component. The first component is composed of at least one of zeolites selected from a group consisting of proton-type zeolites and ammonium type zeolites. The second component is composed of at least one of alkaline-earth metal compounds. The third component is composed of at least one selected from a group consisting of aluminum oxides, aluminum hydroxides, silicon oxides, silicon hydroxides, and clay minerals. The first component has a molar ratio of Si/Al of 10 or more and 300 or less. Content of the second component relative to the first component is 0.3 mass % or more and less than 10 mass % as alkaline-earth metal. Content of the third component relative to the first component is 15 mass % or more and 200 mass % or less.

Abstract: This invention relates to hydrocracking catalysts utilizing stabilized aggregates of small primary crystallites of zeolite Y that are clustered into larger secondary particles. At least 80% of the secondary particles may comprise at least 5 primary crystallites. The size of the primary crystallites may be at most about 0.5 micron, or at most about 0.3 micron, and the size of the secondary particles may be at least about 0.8 micron, or at least about 1.0 ?m. The silica to alumina ratio of the resulting stabilized aggregated Y zeolite may be 4:1 or more. This invention also relates to the use of such catalysts in hydrocracking processes for the conversion of heavy oils into lighter fuel products. The invention is particularly suited for the selective production of diesel range products from gas oil range feedstock materials under hydrocracking conditions.

Abstract: The present invention relates to a Fluid Catalytic Cracking (FCC) additive preparation process and composition, which has high efficiency in the production of light olefins C2, C3 and C4 hydrocarbons, specifically propylene. The present invention discloses the stabilization of medium pore zeolite specifically ZSM-5 using optimum phosphate salts at a pH in the range 7-9 with synergetic combination of silica rich binder to produce FCC additive having excellent stability under severe hydrothermal conditions.

Abstract: Catalyst compositions comprising a phosphorous-promoted ZSM-5 component and a silica-containing binder, and methods for making and using same, are disclosed. More specifically, processes for making a catalyst for biomass conversion are provided. The process includes: treating a ZSM-5 zeolite with a phosphorous-containing compound to form a phosphorous-promoted ZSM-5 component; preparing a slurry comprising the phosphorous-promoted ZSM-5 component and a silica-containing binder; and shaping the slurry into shaped bodies. Such catalysts can be used for the thermocatalytic conversion of particulate biomass to liquid products such as bio-oil, resulting in higher bio-oil yields and lower coke than conventional catalysts.

Abstract: A honeycomb structure includes at least one honeycomb unit which includes walls. The walls have a thickness of from about 0.10 mm to about 0.50 mm and extend along a longitudinal direction of the honeycomb structure to define through-holes. The honeycomb structure has a center area inside a boundary line passing through positions located at substantially a half of a length from a center of the honeycomb structure to a periphery of the honeycomb structure in a cross section perpendicular to the longitudinal direction. The honeycomb structure has a peripheral area outside the boundary line. A thickness of the walls located in the peripheral area is larger than a thickness of the walls located in the center area. A first opening ratio in the center area in the cross section is larger than a second opening ratio in the peripheral area in the cross section.

Abstract: A method of converting nitrogen oxides in a gas to nitrogen by contacting the nitrogen oxides with a nitrogenous reducing agent in the presence of a zeolite catalyst containing at least one transition metal, wherein the zeolite is a small pore zeolite containing a maximum ring size of eight tetrahedral atoms, wherein the at least one transition metal is selected from the group consisting of Cr, Mn, Fe, Co, Ce, Ni, Cu, Zn, Ga, Mo, Ru, Rh, Pd, Ag, In, Sn, Re, Jr and Pt.

Abstract: A honeycomb structure includes a honeycomb unit containing zeolite and an inorganic binder and having a plurality of cell walls to define a plurality of cells extending from a first end face to a second end face of the honeycomb unit along a longitudinal direction of the honeycomb unit. The honeycomb unit is manufactured by molding and firing raw material paste containing zeolite particles and the inorganic binder. The zeolite particles have a D50 of approximately 3.6 ?m or more. An average pore size of the cell walls is more than or equal to approximately 0.10 ?m and less than or equal to approximately 0.50 ?m. An average particle size of the cell walls is more than or equal to approximately 3.6 ?m and less than or equal to approximately 7.0 ?m.

Abstract: A cracking catalyst contains a substantially inert core and an active shell, the active shell containing a zeolite catalyst and a matrix. The catalyst is formed by spray-drying a slurry containing water, substantially inert microspheres and a zeolite precursor and crystallizing zeolite in the active shell to create the cracking catalyst. Methods of using the cracking catalyst are also described.

Abstract: A method of preparing a catalyst comprising selecting a zeolite having a mean particle size of equal to or less than about 6 microns, blending the zeolite with a binder and water to form a paste, shaping the paste into a bound zeolite support, adding a metal to the bound zeolite support to form a metalized catalyst support, and adding at least one halide to the metalized catalyst support to form the catalyst. A catalytic reforming process for converting hydrocarbons to aromatics comprising: contacting a catalyst comprising a silica bound zeolite, a Group VIII metal supported thereby, and at least one halide with a hydrocarbon feed in a reaction zone under reforming conditions and recovering aromatics from the reaction zone, wherein the silica bound zeolite comprises a zeolite having a mean particle size of equal to or less than about 6 microns and a median particle size of equal to or less than about 5 microns.

Abstract: A catalyst for selective catalytic reduction of NOx having one or more transition metals selected from Cr, Mn, Fe, Co, Ce, Ni, Cu, Zn, Ga, Mo, Ru, Rh, Pd, Ag, In, Sn, Re, Ir, Pt, and mixtures thereof supported on a support, wherein the support has a molecular sieve having at least one intergrowth phase having at least two different small-pore, three-dimensional framework structures.

Abstract: A honeycomb structural body includes at least one honeycomb unit which has a longitudinal direction. The at least one honeycomb unit includes plural cell walls, an inorganic binder, and inorganic particles. The plural cell walls extends along the longitudinal direction from one end face to another end face of the at least one honeycomb unit to define plural cells. The inorganic particles include ceria particles, and a ceramic material which has a degree of self-sintering lower than a degree of self-sintering of the ceria particles.

Abstract: An adsorbent for radioelement-containing waste composed of the following spherical layered double hydroxide (A) or spherical metal hydroxide (B) is provided. (A) is a nonstoichiometric compound represented by general formula (a) or (b): [M2+1-xM3+x(OH)2]x+[An?x/n·mH2O]x? . . . (a), [Al2Li(OH)6]x+[An?x/n·mH2O]x? . . . (b) wherein 0.1?x?0.4, 0<m, n represents a natural number of 1 to 4, M2+ represents at least one divalent metal, M3+ represents at least one trivalent metal, and An? represents at least one n-valent ion-exchangeable anion, and (B) is a spherical metal hydroxide containing a metal selected from the group consisting of the metal atoms belonging to Group II, Group IV, Group V, Group VI, Group XI, Group XII, and Group XIII of the periodic table, and the group consisting of Mn, Fe, Co, Ni, Pb, and Bi.

Abstract: A carbon monoxide combustion catalyst and a method of making the catalyst used in fluid bed catalytic cracking process. The catalyst can contain metals and other composites which promote oxidation of carbon monoxide to carbon dioxide during regeneration of spent FCC catalyst.

Abstract: Composite adsorbent beads have a porous and non-adsorbent core comprising at least one inorganic material and a porous and adsorbent shell comprising at least one adsorbent layer comprising a porous adsorbent material on the surface of the core. The core preferably comprises agglomerated inorganic particles having a mean particle size equal to or smaller than the mean particle size of the surrounding agglomerated adsorbent particles. The beads preferably are manufactured by calcining together a non-sintered core and the adsorbent layer. The beads can be used at the outlet end of an adsorption column to improve performance.

Abstract: This invention is directed to hydrocracking catalysts and hydrocracking processes employing a magnesium aluminosilicate clay. The magnesium aluminosilicate clay has a characteristic 29Si NMR spectrum. The magnesium aluminosilicate clay is the product of a series of specific reaction steps. Briefly, the magnesium aluminosilicate clay employed in the catalyst and process of the present invention is made by combining a silicon component, an aluminum component, and a magnesium component, under aqueous conditions and at an acidic pH, to form a first reaction mixture and subsequently the pH of the first reaction mixture is adjusted to greater than about 7.5 to form a second reaction mixture. The second reaction mixture is allowed to react under conditions sufficient to form the magnesium aluminosilicate clay. The resulting magnesium aluminosilicate clay combines high surface area and activity for use in hydrocracking catalysts and processes.

Abstract: A lower olefin producing catalyst which has high olefin production efficiency and maintains its activity for a long period of time when lower olefins are produced from an oxygen-containing compound, which is a solid catalyst used in producing lower olefins from an oxygen-containing compound, includes a solid-state catalyst component containing an MFI-type zeolite, in which, at a position where the shortest distance to the outer surface is maximum among all positions inside a structure of the solid catalyst, the thickness defined as a distance twice the shortest distance from the point to the outer surface is in a range of from 0.1 to 2.0 mm, and a method for producing lower olefins.

Abstract: A silico-alumino phosphate includes Si, Al, and P. A ratio of an amount of substance of Si to a sum of an amount of substance of Al and an amount of substance of P is approximately 0.22 or more and approximately 0.33 or less. An acid point is approximately 1.2 mmol/g or more. A honeycomb structural body includes a honeycomb unit. The honeycomb unit includes the silico-alumino phosphate and an inorganic binder. The honeycomb unit has a plurality of through-holes divided by a plurality of partition walls and arranged in a longitudinal direction of the honeycomb unit. An exhaust gas conversion apparatus includes the honeycomb structural body, a holding sealing member and a metal pipe. The holding sealing member is provided at an outer peripheral portion of the honeycomb structural body. The honeycomb structural body and the holding sealing member are installed in the metal pipe.

Abstract: Solid acid catalysts for use in alkylation processes are described. The solid acid catalysts include a multimetallic (e.g. bimetallic, trimetallic or tetrametallic) component that performs a hydrogenating function for the reactivation (or regeneration) of the catalyst in the presence of hydrogen. The multimetallic catalyst includes a noble metal such as platinum or palladium. The invention also relates to alkylation processes using the multimetallic solid acid catalysts having a multimetallic component for hydrogenation.

Abstract: Embodiments of an invention disclosed herein relate to particles made from zeolite catalysts and their use in oligomerization processes. In particular, shaped particles (for example, spheroid particles) are made from compositions including the contact product of at least one zeolite catalyst and at least one binder.

Abstract: Process for the preparation of C3 and C4 olefins and gasoline by: (a) contacting in a fluidised bed reactor a light hydrocarbon feedstock with a first catalyst inventory comprising a medium pore size zeolite catalyst, wherein the first catalyst inventory is a fresh catalyst inventory; (b) combining at least part of the catalyst inventory as used in step (a) with one or more catalyst streams to form a second catalyst inventory comprising a medium pore size zeolite catalyst and a large pore size zeolite catalyst; (c) contacting a hydrocarbon feedstock with the second catalyst inventory in a reactor riser to form cracked products.

Abstract: The invention concerns a xylenes isomerization process for the production of equilibrium or near-equilibrium xylenes. The process utilizes a catalyst comprising HZSM-5 or MCM-49 and process conditions including a temperature of less than 295° C. and a pressure sufficient to maintain the xylenes in liquid phase. In embodiments, the process can be operated in a continuous mode with ppm levels of dissolved H2 in the feed and in other embodiments in a cyclic mode without the H2 in feed but with periodic regenerations using a feed having low ppm levels of H2.

Abstract: Process for the preparation of a catalyst comprising the steps of (a) preparing a slurry comprising clay, zeolite, and quasi-crystalline boehmite, provided that the slurry does not comprise peptized quasi-crystalline boehmite, (b) adding a monovalent acid to the slurry, (c) adding a silicon source to the slurry, and (d) shaping the slurry to form particles. This process leads to a catalyst with high accessibility and high attrition resistance.

Abstract: The disclosed sorbents are for adsorbing sulfur compounds, particularly sulfur-containing aromatic compounds, from liquid hydrocarbon fuels such as gasoline, cracked gasoline, diesel, high sulfur liquid fossil fuels, ultra-low sulfur fuel (ULSF) in fuel cell applications, and mixtures thereof. The sorbent compositions comprise one or more silicates having one or more metal nitrates admixed together. The one or more metal nitrates include iron (II) or (III), zinc (II), cadmium (II) and mercury (II) nitrate. The method of preparing and using the sorbents is also provided.

Abstract: The present invention relates to a new zeolite having a beta-type crystalline structure, characterized by a distribution of the Lewis acid sites and Brønsted acid sites corresponding to a molar ratio [Lewis sites] [Brønsted sites] equal to or higher than 1.5. This new zeolite is useful in preparation processes of alkylated aromatic hydrocarbons through the alkylation and/or transalkylation of aromatic compounds. The preparation method of the new zeolite is also object of the present invention.

Abstract: A formed zeolite honeycomb article comprises a formed article obtained by extruding a zeolite raw material containing zeolite particles, an inorganic binding material and a filler constituted of plate-like particles in a honeycomb shape including partition walls disposed to form a plurality of cells, a drying shrinkage of the partition walls in a thickness direction thereof is larger than a drying shrinkage of the partition walls in a cell extending direction thereof and a drying shrinkage of the partition walls in a diametric direction perpendicular to the cell extending direction thereof, and the drying shrinkage of the partition walls in the thickness direction thereof is 1.2 or more times the drying shrinkage of the partition walls in the diametric direction perpendicular to the cell extending direction thereof in the formed zeolite honeycomb article.

Abstract: The zeolite structure is a porous zeolite structure constituted of a formed article obtained by extruding a zeolite raw material containing zeolite particles and an inorganic binding material including at least basic aluminum chloride, a ratio P1 (P1=V2/V1×100) of a volume V2 of the inorganic binding material in the zeolite structure with respect to a volume V1 of the zeolite structure is from 10 to 50 vol %, and a relation of equation (1) is satisfied: P2/P1?1.0 ??(1), in which P1 is the ratio of the volume V2 of the inorganic binding material in the zeolite structure with respect to the volume V1 of the zeolite structure and P2 (P2=Vb/Va×100) is a ratio of volumes Vb of pores having pore diameters of 0.003 to 0.03 ?m with respect to the whole pore volume Va of the zeolite structure.

Abstract: A new catalyst and method of preparing the catalyst is presented. The catalyst is a molecular sieve used for cracking olefins, and has improved selectivity to increase propylene yields and to reduce the amount of aromatics and methane produced. The catalyst been ion-exchanged to reduce the alkali composition in the catalyst.

Abstract: This invention relates to the composition, method of making and use of a fluidized catalytic cracking (“FCC”) catalyst that is comprised of a new Y zeolite which exhibits an exceptionally low small mesoporous peak around the 40 ? (angstrom) range as determined by nitrogen adsorption measurements. FCC catalysts made from this new zeolite exhibit improved rates of heavy oil cracking heavy oil bottoms conversions and gasoline conversions. The fluidized catalytic cracking catalysts herein are particularly useful in fluidized catalytic cracking (“FCC”) processes for conversion of heavy hydrocarbon feedstocks such as gas oils and vacuum tower bottoms.

Abstract: A catalyst is described which comprises at least one zeolite with structure type EUO, at least one zeolite having channels the opening to which is defined by a ring of 10 oxygen atoms (10 MR), at least one zeolite having channels the opening to which is defined by a ring of 12 oxygen atoms (12 MR) and at least one porous mineral matrix. Said catalyst optionally also contains at least one group VIII metal. The catalyst of the invention is used in a process for isomerizing a feed comprising aromatic compounds containing 8 carbon atoms per molecule.

Abstract: The invention pertains to a catalyst useful for the epoxidation of an olefin. More particularly, the invention pertains to an improved catalyst useful for the epoxidation of ethylene to ethylene oxide. The catalyst has improved selectivity in the epoxidation process. The catalyst comprises a solid support having a surface, which has a first mode of pores which have a diameter ranging from about 0.01 ?m to about 5 ?m and having a differential pore volume peak in the range of from about 0.01 ?m to about 5 ?m. The surface then has a second mode of pores, different from the first mode of pores, which second mode of pores have a diameter ranging from about 1 ?m to about 20 ?m and have a differential pore volume peak in the range of from about 1 ?m to about 20 ?m.

Abstract: The present invention relates to a mesopore material of a catalyst for upgrading acid-containing crude oil. Said mesopore material is an amorphous material containing alkaline earth oxide, silica and alumina, and has an anhydrous chemical formula of (0-0.3)Na2O.(1-50)MO.(6-58)Al2O3.(40-92)SiO2, based on the weight percent of the oxides, wherein M is one or more selected from Mg, Ca and Ba. Said mesopore material has a specific surface area of 200-400 m2/g, a pore volume of 0.5-2.0 ml/g, an average pore diameter of 8-20 nm, and a most probable pore size of 5-15 nm. The present invention further relates to a process for manufacturing said mesopore material and the use thereof. The catalyst prepared from the mesopore material provided in the present invention is suitable for the catalytic upgrading of inferior acid-containing crude oil and for the removal of organic acids, carbon residues and metals in the crude oil, and thus has very good economic benefits.

Abstract: This invention provides a process for manufacturing a catalyst with a desired attrition index, comprising the steps of selecting at least one molecular sieve having a morphology and size index (MSI) of from 1 to about 1000 to secure said desired attrition index of said catalyst.

Abstract: A honeycomb structural body includes a honeycomb unit having a plurality of through holes defined by partition walls and arranged in a longitudinal direction of the honeycomb unit and having macro-pores having an average pore diameter approximately 0.1 ?m or more and approximately 0.3 ?m or less. The macro-pores have a porosity approximately 30% or more and approximately 40% or less. The honeycomb unit includes a phosphate group zeolite and an inorganic binder.

Abstract: Methods for enhancing the mesoporosity of a zeolite-containing material. Such methods may comprise contacting a composite shaped article containing at least one zeolite and at least one non-zeolitic material with at least one pH controlling agent and at least one surfactant. Such methods may be performed under conditions sufficient to increase the pore volume of at least one 10 angstrom subset of mesoporosity.

Abstract: A honeycomb structure includes at least one honeycomb unit. The at least one honeycomb unit has a plurality of through holes defined by partition walls along a longitudinal direction of the honeycomb unit. The honeycomb unit includes zeolite, an inorganic binder, and a noble metal catalyst. The noble metal catalyst is supported in a region of the honeycomb unit. The region extends from one end portion of the honeycomb unit in the longitudinal direction over approximately 1.5% or more to approximately 20% or less of an overall length of the honeycomb unit in the longitudinal direction.

Abstract: A catalyst composition prepared based on high solids formulation containing a zeolite, a binder precursor, a matrix and a slurring agent and a process for preparing a shaped catalyst product to be used in fluid catalytic cracking process for converting a heavier hydrocarbon fraction into a lighter hydrocarbons, particularly gasoline and light olefins.

Abstract: An agglomerated zeolite adsorbent which comprises 95-99.5 mass % of X zeolite and 0.5-5.0 mass % of binder, wherein the exchangeable cationic sites of said X zeolite are occupied by Group IIA metal and/or K, the total pore volume of said adsorbent is no less than 0.26 mL/g as measured by mercury porosimetry, the volume of pores with pore diameters from 100 to 500 nm is at least 60% based on the total pore volume. During shaping, a pore-forming agent is added to this adsorbent, and then the adsorbent is alkali treated for in-situ crystallization, followed by ion exchange. Said adsorbent has high adsorption capacity, fast mass transfer rate and good mechanical strength. Said adsorbent is suitable for liquid phase adsorptive separation of para-xylene from C8 aromatic hydrocarbons and is also suitable for adsorptive separation of other alkyl aromatic hydrocarbons isomers.

Abstract: The invention is directed to a catalyst for the epoxidation of an olefin to an olefin oxide, the catalyst comprising a support having at least two pore size distributions, each pore size distribution possessing a different mean pore size and a different pore size of maximum concentration, the catalyst further comprising a catalytically effective amount of silver, a promoting amount of rhenium, and a promoting amount of one or more alkali metals, wherein the at least two pore size distributions are within a pore size range of about 0.01 ?m to about 50 ?m. The invention is also directed to a process for the oxidation of an olefin to an olefin oxide using the above-described catalyst.

Abstract: Method of preparation of antioxidant composition on the basis of diphenylamine by catalytic alkylation of diphenylamine by an threefold excess of diisobutylene with regard to diphenylamine in the presence of an alkylation catalyst t in an amount of 5 to 30% by weight, as referred to diphenylamine, at a temperature of 140 to 160° C. Water contained in the catalyst, is removed and subsequently diphenylamine is left to complete the reaction with diisobutylene and after the reaction is finished, the reaction mixture is separated from the catalyst, unreacted diisobutylene is removed from it and the reaction product is obtained.