513 results about "Mordenite" patented technology

The present invention provides a process for producing a monoalkylated aromatic compound, particularly cumene, comprising the step of contacting a polyalkylated aromatic compound with an alkylatable aromatic compound under at least partial liquid phase conditions and in the presence of a transalkylation catalyst to produce the monoalkylated aromatic compound, wherein the transalkylation catalyst comprises a mixture of at least two different crystalline molecular sieves, wherein each of said molecular sieves is selected from zeolite beta, zeolite Y, mordenite and a material having an X-ray diffraction pattern including d-spacing maxima at 12.4±0.25, 6.9±0.15, 3.57±0.07 and 3.42±0.07 Angstrom.

A high VI and low pour point lubricant base stock is made by hydroisomerizing a high purity, waxy, paraffinic Fischer-Tropsch synthesized hydrocarbon fraction having an initial boiling point in the range of 650-750° F., followed by catalytically dewaxing the hydroisomerate using a dewaxing catalyst comprising a catalytic platinum component and an H-mordenite component. The hydrocarbon fraction is preferably synthesized by a slurry Fischer-Tropsch using a catalyst containing a catalytic cobalt component. This combination of the process, high purity, waxy paraffinic feed and the Pt/H-mordenite dewaxing catalyst, produce a relatively high yield of premium lubricant base stock.

The present invention provides a process for producing a monoalkylated aromatic compound, particularly ethylbenzene or cumene, in which a polyalkylated aromatic compound is contacted with an alkylatable aromatic compound in the liquid phase and in the presence of a transalkylation catalyst comprising TEA-mordenite having an average crystal size of less than 0.5 micron.

A composite millipore-mesopore molecular sieve is prepared through proportionally adding millipore Zeolite molecular sieve ZSM-5, beta-zeolite, mordenite, L-zeolite, MCM-22 and ZSM-35 to the solution of sodium hydroxide, stirring, adding the template agent of mesopore molecular sieve, crystallizing at 90-120 deg.C for 22-26 hr, regulating pH=7.5-7.9, and static crystallizing at 90-120 deg.c for 24-168 hr.

The invention discloses a synthetic method for ZSM-5/mordenite mixed crystal material, wherein ZSM-5 molecular sieve is charged into the synthesized reaction mixture of mordenite as seed crystal, and said material is prepared through water thermal crystallization. The invention realizes low making cost and more ideal catalyzing performance.

A method for the decontamination of fluid (liquid or supercritical) carbon dioxide fluid, especially of hydrocarbon contaminants, down to <=100 ppb concentration are described. The critical component is a high silica zeolite, preferably a high silica Y-type zeolite, ZSM-5 or a high silica mordenite, which in a variety of physical forms is capable of decontaminating such fluid CO2 to <=100 ppb, <=10-50 ppb, or ~1 ppb, without being detrimentally affected by the supercritical operating environment. The high silica zeolite may be produced by the removal of alumina from a natural or synthetic zeolite while retaining the desirable zeolite structure, to a silica:alumina ratio of from 20-2000:1. Preferably the zeolite is disposed in separate quantities in at least two vessels, which operate alternately. A portion of the purified product from the operating vessel is directed to the other vessel and there used to remove accumulated contaminants from that vessel's zeolite. The process thus provides self-regeneration, in that regeneration of one vessel occurs while the other vessel decontaminates contaminated fluid carbon dioxide, so that use of the two can be alternated for substantially continual production of purified fluid carbon dioxide. The invention provides purified fluid carbon dioxide used in manufacture of such products as high purity electronic, optical, prosthetic or similar products or polymers or pharmaceuticals or in beverages.

A catalyst for the disproportionation/transalkylation of various hydrocarbons consists of a carrier and a metal component supported on the carrier. The carrier comprises 10 to 80 wt % of mordenite and/or beta type zeolite with a mole ratio of silica/alumina ranging from 10 to 200; 0 to 70 wt % of ZSM-5 type zeolite with a mole ratio of silica/alumina ranging from 30 to 500; and 5 to 90 wt % of at least one inorganic binder selected from the group consisting of gamma-alumina, silica, silica alumina, bentonite, kaolin, clinoptilolite, and montmorillonite. The metal component comprises platinum and either tin or lead. The catalyst enables mixed xylenes to be produced at remarkably high yields from benzene, toluene and C9 or higher aromatic compounds through disproportionation/transalkylation with a great reduction in aromatic loss. In addition, the catalyst can maintain its catalytic activity for a long period of time without deactivation.

A catalyst and a method for selectively reducing nitrogen oxides (“NO_x”) with ammonia are provided. The catalyst includes a first component comprising a zeolite or mixture of zeolites selected from the group consisting of ZSM-5, ZSM-11, ZSM-12, ZSM-18, ZSM-23, MCM-zeolites, mordenite, faujasite, ferrierite, zeolite beta, and mixtures thereof; a second component comprising at least one member selected from the group consisting of cerium, iron, copper, gallium, manganese, chromium, cobalt, molybdenum, tin, rhenium, tantalum, osmium, barium, boron, calcium, strontium, potassium, vanadium, nickel, tungsten, an actinide, mixtures of actinides, a lanthanide, mixtures of lanthanides, and mixtures thereof; optionally an oxygen storage material and optionally an inorganic oxide. The catalyst selectively reduces nitrogen oxides to nitrogen with ammonia at high temperatures. The catalyst has high hydrothermal stability. The catalyst has high activity for conversion of low levels of nitrogen oxides in exhaust streams. The catalyst and the method may have special application to selective reduction of nitrogen oxides in exhaust gas from gas turbines and gas engines, although the catalyst and the method have broad application to a wide range of gas streams that have excess oxygen and high temperatures. The temperature of exhaust gas from gas turbines and gas engines is high. Both the high temperature and the low levels of inlet NO_x are challenging for selective catalytic reduction (SCR) catalysts.

The present invention relates to a benzene and xylene catalyst, which is synthesized by aromatics transalkylation and dealkylation. The present invention mainly solves the problem in the prior art that a high by-product content in a benzene product of the reaction products causes bad quality of the benzene product. The present invention solves the problem well by a technical proposal that a catalyst consists of 40 to 130 portions of a mixture of a beta zeolite, SiO2/Al2O3, Beta zeolite, the molar ratio of which is 10 to 100 and at least one zeolite which is selected from a mordenite, a Y zeolite, ZSM-12 or ZSM-5, 10 to 60 portions of binder, and 0.1 to 20 portions of at least one oxide of which is selected from molybdenum, palladium, fe, bismuth, cerium, lanthanum, nickel, tin or platinum, and all components are accounted by weight portions. The catalyst can be used for the technologies of a transfer of a heavy aromatic hydrocarbon of carbon-nine or above with toluene alkyl and the dealkylation and used for the industrial production of the xylene products.

The invention relates to a preparation method of the ZSM-5/mordenite compound molecular sieve, mainly solves the complex question which needs to add the seed crystal or subsect the crystallization in the existing compound molecular sieve synthesize process. Through controls the certain silicon aluminum ratio and the pH value in the molecular sieve synthesize process, the invention prepares the compound molecular sieve with the adjustable ZSM-5 and the mordenite proportion, the technical program solves the problem preferably. The molecular sieve which is prepared by the invention can be used in the industrial production of the naphtha catalytic pyrolysis system ethylene propylene.

A catalyst for lightening the heavy arylhydrocarbon contains the metal in VIII family and composite carrier including ZSM-5 zeolite, mordenite and alumina. It can increase the transform rate of C9 aryhydrocarbon and output rate of xylene, and decrease the carbon deposit.

The invention relates to a mordenite/beta zeolite/Y zeolite coexisting material and a method for synthesizing the same, and mainly solves the problems that a porous material synthesized by the prior art is single in pore-size, weak in acid and low in activity. The method prepares the mordenite/beta zeolite/Y zeolite coexisting material by adding a seed crystal containing a Y zeolite precursor during a synthesis process of mordenite/beta zeolite/Y zeolite coexisting material. A mole relation of the components of the synthesized mordenite/beta zeolite/Y zeolite coexisting material is nSiO2 :Al2O3, wherein n is between 4 and 400; the XRD diffraction pattern of the mordenite/beta zeolite/Y zeolite coexisting material comprises a technical proposal that a maximum value of a distance d is at positions between 14.52-0.1 and 14.52+0.1 A, 13.52-0.1 and 13.52+0.1 A,11.32-0.1 and 11.32+0.1 A, 8.96-0.1 and 8.96+0.1 A, 6.71-0.1 and 6.71+0.1 A, 5.71-0.1 and 5.71+0.1 A, 4.51-0.05 and 4.51+0.05 A, 4.15-0.05 and 4.15+0.05 A, 3.97-0.05 and 3.97+0.05 A, 3.78-0.05 and 3.78 +0.05 A, 3.51-0.05 and 3.51+0.05 A, 3.02-0.05 and 3.02+0.05 A, and 2.86-0.1 and 2.86+0.1 A; therefore, the problems are solved well. The mordenite/beta zeolite/Y zeolite coexisting material can be used in the industrial production of ethylene and propylene through the catalytic pyrolysis of naphtha.

The invention relates to a preparation method of a mordenite/ZSM-5 core-shell type molecular sieve material, mainly solving the problems that mordenite and ZSM-5 zeolite molecular sieve are difficult for compound growth in the prior art. The method comprises the following steps of: (1) treating mordenite crystal grains in a modified agent solution; (2) adding the mordenite crystal grains treated by a modified agent into a ZSM-5 synthetic system comprising a template agent R, a silicon source, an aluminum source and water, wherein the mol ratio of R2O to SiO2 is 0.05-0.5, the mol ratio of SiO2 to Al2O3 is 50-infinity, the mol ratio of SiO2 to Na2O is 2-10 and the mol ratio of H2O to SiO2 is 20-100; and (3) hydrothermally crystallizing, filtering, washing and roasting to obtain the mordenite/ZSM-5 core-shell type molecular sieve material, thus the problems are better solved. The invention can be used for industrial production of the mordenite/ZSM-5 core-shell type molecular sieve materials.

The invention discloses a method for synthesizing a mesoporous mordenite molecular sieve. The method comprises the following steps of: dissolving an aluminum source in a sodium hydroxide solution; adding a silicon source and stirring to disperse for a certain period of time at room temperature under strong magnetic force, wherein the uniformly dispersed solution of silicon source and aluminum source is mixed into glue at room temperature; adding a dealuminated mordenite molecular sieve as seed crystal; stirring and uniformly mixing at room temperature under strong magnetic force, and transferring the product into a reaction crystallization kettle; performing crystallization reaction at 150-170 DEG C for 0.5-3 days; and performing conventional suction filtration, washing and drying to obtain a solid product. The synthesis method disclosed by the invention has the characteristics that the expensive organic amine template agent is not used as a structure directing agent, and the cheap and easily-available inorganic layered precursor with wide source is used as the seed crystal to directly synthesize a mordenite molecular sieve with high silica-alumina ratio; and the prepared nano mordenite molecular sieve has the advantages of high crystallinity and purity, abundant accumulation meso pores, controllable particle size, form and low cost, less environment pollution and convenience for industrial large-scale production.

The invention extends the connotation range required to be protected on the basis of a previously issued patent ZL200710025045.4, i.e., a nanometer microcrystalline composite filter material and a preparation method thereof, belonging to the field of a water disposal technique material. According to weight percentage, the nanometer microcrystalline composite filter material comprises 3-95 percent of attapulgite clay, 5-80 percent of sepiolite clay, 2-25 percent of kaolinite clay, 2-97 percent of tubular halloysite, 5-75 percent of diatomite, 5-75 percent of natural zeolite (clinoptilolite, mordenite and the like), 0-25 percent of pillared montmorillonite, 0-50 percent of expanded vermiculite, 0-5 percent of expanded perlite and 0-50 percent of active carbon or bamboo carbon powders. All raw materials which are powder shapes are mixed according to proportion and stirred to granulate by adding an inorganic adhesive, then sintered and activated at the temperature of 900-500 DEG C (inert gas is required for sintering and activating the filter material added with active carbon). The nanometer microcrystalline composite filter material has smooth shape, rough surface and uniform particle size, with the diameter of 1-10mm, and is used for biological filter tanks and high-class adsorption filter materials in deep purification systems of drinking water and reclaimed water sewage disposal systems.

A diesel oxidation catalyst comprising a honeycomb substrate washcoated with a mixture of clay, a refractory oxide and a zeolite is disclosed. The washcoated substrate is subsequently deposited with a precious metal catalyst and a sulfur oxidation suppressant. In a preferred embodiment, the clay is acid-leached bentonite, the refractory oxide is zirconia or titania, the zeolite is beta-zeolite or Y-zeolite or ZSM-5 or mordenite, the precious metal catalyst is preferably platinum, and the sulfur oxidation suppressant is vanadium or vanadium oxide or a combination thereof

The invention discloses a sulfur-tolerant deoxidizing catalyst, preparation method and application thereof. The catalyst of the invention is composed of active components and porous carriers, the active components are one or more of compound of iron and/or copper, the porous carriers are selected from one or more of aluminium oxide, titanium oxide, zirconium oxide, zinc oxide, magnesium oxide, calcium oxide, silicon dioxide, aluminophosphate molecular sieves, A type molecular sieves, X type molecular sieves, Y type molecular sieves, mordenite, ZSM-5 zeolite, kieselguhr, kaoline, natural clay, aluminum silicate and magnesium silicate. Based on the oxide content, the active components loading amount is 1-95% by weight, the rest are porous carriers. The catalyst of the invention has definite sulfur-tolerant performance, is suitable for deoxidation treatment of coal seam gas with oxygen content of 3-6% (V/V), and can deoxidize the coal seam gas to make the oxygen content less than 0.5%.

The invention discloses an amination catalyst and a preparation method thereof, which aims to solve the problem that the amination catalyst is not high in activity and selectivity. The compositions in weight percentage of the amination catalyst are: 15 to 25 percent of A, 5 to 10 percent of B, 1 to 3 percent of C, 0.1 to 1.5 percent of D, and the balance being h-type mordenite, wherein the A is alumina; the B is titanium oxide; the C is metallic ion W<6+>, Re<7+> or Bi<3+>; the D is metallic ion Cs<+>; and the metals exist in the form of elements or oxides. The preparation method comprises the following steps of loading the components C and D on the h-type mordenite, well mixing the components C and D with the alumina and ethanolamine titanate dodecane alcohol ester, molding, roasting and activating the mixture. The catalyst is used for synthesizing ethylene dimine under the conditions of ethanolamine and ammonia phase.

The invention relates to a mordenite/Y zeolite coexisting molecular sieve and a method for synthesizing the same, and mainly solves the problems that a porous material synthesized by the prior art is single in pore-size, weak in acid and low in activity. The method prepares the mordenite/Y zeolite coexisting molecular sieve by adding a seed crystal containing a Y zeolite precursor and well controlling the nucleating and growing process of a molecular sieve during a synthesis process of mordenite. The coexistence phase ratio of the mordenite/Y zeolite coexisting molecular sieve is adjustable, and a mole relation of the components of the synthesized coexisting molecular sieve is nSiO2 :Al2O3, wherein n is between 4 and 400; the coexisting molecular sieve has more than two phases, the XRD diffraction pattern of the coexisting molecular sieve comprises a technical proposal that a maximum value of a distance d is at positions between 14.52-0.05 and 14.52+0.05 A, 13.52-0.05 and 13.52+0.05 A, 8.96-0.05 and 8.96+0.05 A, 8.83-0.05 and 8.83+0.05 A, 6.71-0.1 and 6.71+0.1 A, 5.71-0.1 and 5.71 +0.1 A, 4.51-0.1 and 4.51+0.1 A, 3.98-0.1 and 3.98+0.1 A, 3.78-0.05 and 3.78+0.05 A, 3.47-0.1 and 3.47+0.1 A, and 2.86-0.1 and 2.86+0.1 A; therefore, the problems are solved well. The coexisting molecular sieve can be used in the industrial production of ethylene and propylene through the catalytic pyrolysis of naphtha.

The invention relates to a catalyst used to composite ethanediamine from gas phase and relative production, wherein it comprises 20-30% alumina, 5-15% metal ion, and left is hydrogen mordenite treated by acid, while metal ion can be one of Zr4+, Nb5+, Mo6+, Sn4+, Sb5+ with one of Zn2+, Fe3+, while their mol ratio is 1-10:1. And its production comprises loading the metal ion on the treated hydrogen mordenite, drying, and mixing with alumina, compressing, baking and activating. The invention is used to composite ethanediamine from ethanolamine and ammonia gas.