588results about "Catalyst carriers" patented technology

The invention relates to the technical field of catalyst carriers, and discloses reticular porous spherical aluminum oxide as well as a preparation method and application thereof. The preparation method comprises the following steps: (1) mixing an aluminum source, acid, a pore-forming agent, a surfactant and water to obtain pseudo sol; (2) performing ultrasonic treatment and oil ammonia column forming treatment on the pseudo sol obtained in the step (1) to obtain gamma-Al2O3 spherical gel beads; and (3) aging, washing, drying and calcining the gamma-Al2O3 spherical gel beads obtained in the step (2) to obtain the reticular porous spherical alumina. The spherical aluminum oxide prepared by the method has abundant communicated reticular pore channels, is obviously distributed in mesopore and macropore ranges, is beneficial to obviously improving dispersion and loading of a catalyst in an aluminum oxide carrier and improving the performance of petroleum reforming and propane dehydrogenation, and has industrial production utilization value and commercial value.

The invention is suitable for the technical field of photocatalyst preparation, and provides a modified tubular g-C3N4 loaded Ni-CoP photocatalyst and a preparation method thereof. The preparation method comprises the following steps: calcining a carbon nitride precursor in stages to obtain tubular carbon nitride, stirring the tubular carbon nitride with a cobalt and nickel-containing compound and an alkaline compound, washing and drying to obtain a precipitate, calcining, mixing and grinding with a phosphorus-containing compound, calcining again, and modifying the product with polydopamine and polypyrrole to obtain the composite material. The photocatalyst modified by the polydopamine and the polypyrrole and loaded with the Ni-CoP by taking the tubular g-C3N4 as the carrier is obtained. According to the invention, three-in-one synergistic integration of'carrier-modifier-cocatalyst 'is realized, the prepared photocatalyst still keeps tubular morphology and has a larger specific surface area, the requirements of anode oxygen evolution reaction (OER) on rapid charge separation and transmission can be met, meanwhile, the light absorption range is widened, the solar energy utilization rate is increased, and a foundation is laid for efficient OER reaction.

The invention discloses a preparation method of a carbon shell confinement type nickel-bismuth-titanium composite catalyst and application of the carbon shell confinement type nickel-bismuth-titanium composite catalyst in high alcohol synthesis, and belongs to the technical field of catalysts. The preparation method of the carbon shell confinement type nickel-bismuth-titanium composite catalyst comprises the following steps: dissolving nickel salt, titanium dioxide and citric acid in water to form a homogeneous solution; adding bismuth salt into the homogeneous solution, and drying to obtain a precursor; and roasting the precursor to obtain the carbon shell confinement type nickel bismuth titanium composite catalyst. The carbon shell confinement type nickel-bismuth-titanium composite catalyst provided by the invention shows excellent catalytic performance in a reaction system for synthesizing high-carbon alcohol through carbon-carbon coupling of water-phase alcohol molecules. According to the catalyst, the high-carbon alcohol yield can reach 45.04% while high organic phase selectivity is maintained, and compared with a traditional nickel-bismuth-based catalyst, the high-carbon alcohol yield is remarkably improved.

The invention discloses a supported noble metal catalyst for a wet catalytic oxidation reaction and a preparation process of the supported noble metal catalyst, and belongs to the technical field of catalysts for wastewater treatment. The noble metal catalyst comprises a modified titanium dioxide carrier, transition metal and noble metal, the transition metal and the noble metal are loaded on the modified titanium dioxide carrier, the modified titanium dioxide carrier is modified by adopting rare earth metal, the total loading amount of the noble metal and the transition metal is 0.5-0.7 wt%, and after the titanium dioxide carrier is subjected to rare earth modification, the noble metal and the transition metal are loaded on the modified titanium dioxide carrier. The titanium dioxide carrier transition metal forms stable chemical bonds, precipitation of the transition metal in the use process is reduced, and meanwhile, the transition metal and the noble metal are matched with each other, so that the catalytic activity of the noble metal catalyst is improved.

The invention discloses an argillaceous sandstone uranium ore leaching method and device based on a recyclable activation material, and relates to the technical field of uranium ore resource development. The preparation method of the recyclable activated material comprises the following steps: adding WS2 and Fe3O4 into an aqueous solution, uniformly stirring, adding a boron-containing compound, a fluorine-containing precursor aqueous solution and a nitrogen-oxygen-containing compound, uniformly stirring, heating, stirring for reaction, filtering, washing and drying to obtain a precursor; and calcining the precursor in a protective atmosphere to obtain F / O co-doped h-BN / WS2 / Fe3O4 which is used as a recoverable activation material. The obtained recoverable activated material has good catalytic performance, can be widely applied to preparation of a catalyst for leaching uranium from argillaceous sandstone uranium ore, and can generate strong turbulence, secondary circulation and near-wall shear force for high-viscosity ore pulp and efficiently excite the catalytic activity of a piezoelectric material in cooperation with the device provided by the invention.

The invention belongs to the technical field of denitration catalysts, and discloses a CO-SCR denitration catalyst and a preparation method and application thereof. The preparation method comprises the following steps: (1) putting honeycomb cordierite into a muffle furnace for preliminary calcination to obtain a carrier; (2) immersing the carrier into a mixed solution containing an aluminum source and an alkaline nitrogen source for hydro-thermal treatment, taking out the carrier after hydro-thermal treatment, and washing and drying to obtain a surface modified carrier; (3) preparing a bottom layer coating solution containing catalyst powder and a first pore-forming agent; preparing a surface layer coating solution containing catalyst powder and a second pore forming agent; wherein the average particle size of the first pore-forming agent is larger than that of the second pore-forming agent; (4) immersing the surface modified carrier into the bottom layer coating liquid for coating, carrying out primary drying, then immersing the surface modified carrier into the surface layer coating liquid for coating, and carrying out drying treatment to obtain a catalyst precursor; and (5) calcining the catalyst precursor to obtain the CO-SCR denitration catalyst.

The invention relates to the field of inorganic material preparation, and particularly discloses pseudo-boehmite and a preparation method thereof. A preparation method of pseudo-boehmite comprises the following steps: (1) mixing an aluminum salt solution and an aluminate solution, adding a crystal form regulating agent, and stirring for reaction to obtain a sol system; the crystal form regulating agent is ZnS quantum dots modified by thiohydracrylic acid; (2) adding a pore diameter guiding agent into the sol system, and aging for 6-8 hours; the pore diameter guiding agent is a compound of a polyethylene glycol-polypropylene glycol-polyethylene glycol triblock copolymer and sodium citrate; and (3) carrying out solid-liquid separation on the aged sol system, and washing and drying the obtained solid to obtain the pseudo-boehmite. The proportion of 5-10nm pores of the pseudo-boehmite prepared by the preparation method disclosed by the invention reaches 90% or above, so that the pore distribution requirement of a fine catalytic reaction on the pseudo-boehmite can be met, and the efficient catalytic reaction is favorably realized.

The invention provides an aluminum-doped NiCoCe catalyst, a preparation method thereof and application of the aluminum-doped NiCoCe catalyst in low-temperature CO2 hydrogenation methane preparation reaction, the preparation method comprises the following steps: (1) dissolving nickel nitrate, cobalt nitrate, cerium nitrate, aluminum nitrate and an alkaline precipitator in deionized water, and fully stirring the solution at room temperature to obtain a solution A; (2) putting the solution A into a reaction kettle, and crystallizing the mother liquid at a constant temperature for a certain time to obtain a solid-liquid mixture B; (3) centrifuging and washing the solid-liquid mixture B in the step (2) to obtain a precipitate C; (4) drying the precipitate C in the step (3) to obtain a precursor D; and (5) reducing and passivating the precursor D in the step (4) to obtain the catalyst. The catalyst prepared by the invention effectively solves the problem of low CO2 conversion rate in low-temperature CO2 methanation reaction, lattice distortion is promoted by introducing the Al element, the migration ability of lattice oxygen is increased, and the formation of a large number of oxygen vacancies is beneficial to improving the oxidation-reduction property of the catalyst.

The invention relates to the technical field of catalyst carriers, and particularly discloses a preparation method of a high-bulk-ratio double-peak pore-tooth spherical alumina carrier. The preparation method of the high-bulk-ratio bimodal pore-tooth spherical alumina carrier comprises the following steps: taking mesoporous pseudo-boehmite, macroporous pseudo-boehmite, a composite molding aid, a soft template pore-enlarging agent and a hard template pore-enlarging agent as raw materials, performing dry mixing for 10-20 minutes under the vacuum degree of-0.06 to-0.08 MPa, then adding a peptizing agent and deionized water, and performing stirring and kneading to obtain paste; and extruding the paste into strips, dicing, rounding, drying and roasting to obtain the alumina carrier. According to the preparation method disclosed by the invention, the tooth spherical alumina carrier with high bulk ratio and double-peak pores is obtained.

In view to the technical problems of low recovery rate of metal elements in metallurgical slag and the problem of inefficient recovery of residual heat of metallurgical slag generated by traditional technology, the present application provides a technology and method for preparing microporous-rich metallurgical slag particles based on carbon etching and efficiently recovering residual heat of metallurgical slag in coal gasification, mainly including four parts of granulation system, etching powder adhesion system, etching gasification system and screening separation system which are sequentially connected, and mainly through four steps of molten metallurgical slag granulation, etching powder adhesion, etching gasification reaction, screening and separation, the efficient recovery and utilization of residual heat of metallurgical slag and the high value conversion of metallurgical slag particle products are realized. The utilization value of metallurgical slag particles is increased by 10-15 times through the system.

The invention relates to an SCR (Selective Catalytic Reduction) denitration catalyst carrier and a preparation method and application thereof, and the preparation method comprises the following steps: (1) crushing a waste FCC (Fluid Catalytic Cracking) catalyst, performing roasting treatment, and performing dry ball milling after roasting to obtain powder; (2) adding the powder into a mixed acid solution for pickling treatment, wherein the mixed acid comprises inorganic acid and organic acid; (3) filtering and washing the material subjected to acid pickling treatment to obtain a solid, and drying and roasting the solid to obtain molecular sieve carrier powder; and (4) mixing the carrier powder with TiO2 by a sol-gel method to prepare a composite carrier, namely the SCR denitration catalyst carrier. The waste FCC catalyst is used as a raw material to prepare the SCR denitration catalyst carrier, and the carrier has the advantages of low heavy metal content, high active component content, good water resistance and the like.

The invention belongs to the field of regeneration treatment of waste mineral oil, and particularly relates to a hydrogenation catalysis treatment process for a waste mineral oil suspension bed. The method aims at the problem of deep removal of impurities such as organic chlorine and organic silicon in waste mineral oil. A novel multifunctional composite adsorbent is prepared, a modified aluminum oxide-titanium oxide composite carrier is used as a basis, a main active metal tungsten and an auxiliary agent metal copper are loaded, and the main active metal tungsten and the auxiliary agent metal copper are converted into corresponding sulfides through vulcanization treatment; through multi-stage countercurrent contact, impurities such as chlorine and silicon in the waste oil are deeply removed, the process can efficiently remove organic chlorine and silicon impurities in the waste mineral oil, the service life of a hydrogenation catalyst is remarkably prolonged, the product quality is improved, and downstream equipment is prevented from being corroded.

The invention relates to a calcium-based desulfurizer and a preparation method and application thereof, and relates to the technical field of desulfurizers, the calcium-based desulfurizer comprises a calcium-based carrier with a micropore-mesopore-macropore three-level pore structure, and a gamma-aminopropyltriethoxysilane modifier dispersed in pore channels, the molecular imprinting layer is modified by an inactive region on the inner wall of the mesoporous; the preparation method comprises the steps of calcium-based carrier pretreatment, composite pore forming, pre-roasting, hydroxyl strengthening and the like. The efficient mass transfer system is constructed through a three-stage pore structure, the modifier and the molecular imprinting layer synergistically improve the structural stability and the sulfur dioxide adsorption selectivity, the calcium base utilization rate and the desulfurization efficiency are improved, and the industrial flue gas desulfurization requirement is met.

The invention belongs to the technical field of wastewater treatment, and particularly relates to an adsorption particle electrode for wastewater and waste liquid treatment and a preparation method thereof. The preparation method comprises the following steps: adding a zinc salt, a vanadium salt, a scandium salt and cetyltrimethylammonium bromide into water, stirring, adjusting the pH value at 70-80 DEG C, continuously stirring, filtering, drying and calcining to obtain modified mesoporous zinc oxide; and dispersing the modified mesoporous zinc oxide in water, adding the composite aerogel, soaking, filtering, washing, drying and grinding to obtain the adsorption particle electrode. The adsorption particle electrode prepared by the invention can be used for degrading printing and dyeing wastewater, and has the excellent performances of high degradation rate, high degradation speed, reusability and the like.

The invention provides a carrier material as well as a preparation method and application thereof, the preparation method of the carrier material comprises the following steps: 1) mixing a mixed solution containing a polyhydroxy compound and / or a polyamine compound, polycarboxylic acid and a metal source with a porous material to obtain a mixed system; wherein the mass of the mixed solution is 40-60% of the mass of the porous material; and 2) carrying out post-treatment including polymerization treatment, drying treatment and roasting treatment on the mixed system to obtain the carrier material. According to the preparation method of the carrier material provided by the invention, metal ions enter the pore channels of the porous material, the metal material can be uniformly distributed on the inner surfaces of the pore channels under the pore channel confinement effect, and the carrier material is applied to a catalyst, so that the temperature of a catalytic oxidation reaction of a volatile organic compound can be reduced.

The invention relates to the technical field of wastewater treatment, in particular to an iron-based nano-enzyme coupled photocatalytic system and application thereof in organic wastewater degradation, and the iron-based nano-enzyme coupled photocatalytic system comprises the following components in percentage by weight: 10-20% of iron-based nano-enzyme, 15-25% of a modified photocatalyst, 25-35% of a porous carrier, 3-8% of an electron mediator, 1-3% of a pH regulator and 0.5-2% of a rare earth element dopant; the iron-based nano-enzyme is nitrogen-doped iron-copper-cobalt trimetal nano-enzyme, the molar ratio of Fe to Cu to Co is (6: 1: 1)-(8: 1: 1), the doping amount of N is 3-6at%, the particle size is 20-50nm, and the peroxidase activity is 120-150U / mg; the modified photocatalyst is graphene quantum dot-carbon dot co-modified titanium dioxide, the total loading capacity is 2-5 wt%, and the forbidden bandwidth is 2.8-3.0 eV; the porous carrier is a mesoporous silica-carbon nanotube-montmorillonite composite material. According to the invention, the synergistic degradation effect is excellent, refractory pollutants can be decomposed, and no toxic intermediates exist; the catalyst is suitable for high-salt and high-turbidity wastewater with different acidity and alkalinity, is good in stability, can be recycled, and is less in metal dissolution; the energy consumption is low, the operation is simple and convenient, the treated wastewater reaches the standard and can be recycled, and the environmental and economic benefits are remarkable.

The present application provides a honeycomb ceramic carrier, a preparation method thereof, and a catalytic body containing the honeycomb ceramic carrier, the honeycomb ceramic carrier comprising: a body; a plurality of compartments with hollow structures in the body, the compartments penetrating through the body to form a honeycomb structure; wherein the compartments have a quadrilateral cross section, one pair of opposite angles of the quadrilateral cross section has an inner recess or a chamfer, and the other pair of opposite angles of the quadrilateral cross section does not have an inner recess or a chamfer. The present application improves the structural strength of the ceramic carrier for carrying catalysts, and reduces the bending phenomenon of the partition wall of the thin-walled ceramic carrier with a honeycomb structure without increasing the degree of mold wear, thereby improving the yield.

The application discloses a composite metal catalyst for catalytic degradation of VOCs at low temperature and a preparation method thereof, and belongs to the field of environmental protection catalysis technology. The composite metal catalyst comprises the following components in percentage by weight: 5-25% of a multi-component composite metal oxide, 65-90% of modified mesoporous zeolite, 2-6% of a composite additive, and 1-3% of a high-temperature-resistant binder. The multi-component composite metal oxide is a copper / manganese / cerium / zirconium quaternary composite oxide, and the molar ratio of copper, manganese, cerium and zirconium is 1:(0.8-1.2):(0.5-0.8):(0.2-0.5). The modified mesoporous zeolite is ZSM-5 mesoporous zeolite which is modified by rare earth ions and an amphoteric surfactant. The application adopts the copper / manganese / cerium / zirconium quaternary composite metal oxide as an active component, the introduction of cerium and zirconium forms a solid solution structure, greatly improves the oxygen storage capacity and the redox performance of the active component, and the synergistic effect of copper and manganese and cerium and zirconium significantly reduces the oxidation and decomposition temperature of VOCs.

The application belongs to the technical field of solid waste resource recycling and treatment in petrochemical industry, and particularly discloses a method for recovering vanadium and molybdenum from waste petrochemical catalysts. The method directly mixes granular waste petrochemical catalysts with an activating agent, and then performs short-time calcination in a microwave environment to obtain calcined slag. The calcined slag is directly treated by a low-speed stirring water immersion process, and after solid-liquid separation, leaching liquor containing rare metals vanadium and molybdenum and leaching slag which can be directly used as a catalyst carrier raw material are obtained. The method can realize rapid recovery of rare metals such as vanadium and molybdenum in waste petrochemical catalysts, has short recovery and treatment time, high recovery rate, and the waste catalysts after recovery and treatment have high alumina content and can be directly used as catalyst carrier raw materials.

The present application provides a shaped catalyst for selective oxidation of n-butane and a preparation method thereof. The shaped catalyst comprises an active component and a hydroxyl silicate, wherein the active component comprises vanadium phosphorus oxide. The present application also provides a method for preparing maleic anhydride by using the catalyst. In the preparation process of the catalyst, the hydroxyl silicate is added as a lubricant and a reinforcing agent, the mechanical strength of the shaped body of the catalyst after the hole expansion treatment is improved, various shaped bodies with stable structures are obtained, and the selective oxidation of n-butane can produce valuable products with high selectivity.

The invention discloses nanoscale Ti2O3, a preparation method and application of the nanoscale Ti2O3 as a catalyst carrier, and belongs to the technical field of nano material preparation. According to the invention, a solid-phase synthesis method is utilized, nano titanium powder and nano titanium dioxide are used as raw materials, and the nano-scale Ti2O3 brownish black powder with uniform particle size distribution is controllably synthesized. Meanwhile, a series of noble metal supported catalysts are synthesized by taking the catalyst as a catalyst carrier. According to the invention, rapid synthesis of nanoscale Ti2O3 is realized, and the particle size of the prepared sample is uniform and is about 300nm. The preparation method has the characteristics of high efficiency, rapidness, low equipment requirement, simplicity, easiness in repetition, high product purity and capability of realizing large-scale synthesis. Meanwhile, the prepared nanoscale Ti2O3 is small in size and uniform, so that a catalyst prepared by taking the nanoscale Ti2O3 as a carrier has relatively good dispersity, shows excellent electrocatalytic activity, can be prepared into catalyst slurry with relatively high uniformity, and is suitable for the fields of electrochemical catalysis and energy conversion.

The invention discloses a fixed bed residual oil hydrodesulfurization catalyst carrier as well as a preparation method and application thereof, and belongs to the technical field of catalysts. According to the method, the water retention function of wet balls is improved by adding silochrom, so that the surfaces of extruded strips are dry and comfortable, and adhesion among particles is reduced; viscosity slow-release cellulose is combined, so that the viscosity of the kneaded material is further reduced, and the efficiency of the pelletizing process is improved; the water-soluble thermocuring polymer resin is added, so that the extrusion resistance of the wet bulb is improved, and the pore structure is improved; after the treatment, the strip-shaped surface extruded by the strip extruder is dry and comfortable, the viscidity is moderate, and the production continuity and efficiency of the pelletizing device are improved. After the carrier is prepared into a tooth spherical carrier, the tooth spherical carrier can be directly used as a hydrodesulfurization catalyst to be filled below the tangent line of a reactor, and can cope with larger raw material treatment load, slow down the rise of bed pressure drop and prolong the running time of a device.

The invention discloses a preparation method of a pseudo-boehmite catalyst carrier, and relates to the technical field of preparation of catalyst carriers. The preparation method comprises the following steps: dissolving aluminum hydroxide in a sodium hydroxide solution to obtain a reaction solution; introducing compressed carbon dioxide into the reaction liquid to generate pseudo-boehmite slurry, and carrying out filter pressing to obtain a first pseudo-boehmite wet cake; mixing the first pseudo-boehmite wet cake with industrial nitric acid, and performing aging treatment to obtain alumina gel; adding a sodium metaaluminate solution into the alumina gel to adjust the pH value, adding a composite template agent, stirring, and carrying out filter pressing again to obtain a second pseudo-boehmite wet cake; and washing, calcining and crushing the second pseudo-boehmite wet cake to obtain the pseudo-boehmite catalyst carrier. According to the preparation method provided by the invention, the structural performance of the pseudo-boehmite catalyst carrier is improved, the pseudo-boehmite catalyst carrier is of a double-pore distribution structure, and the pseudo-boehmite catalyst carrier can be suitable for various catalytic reactions related to environmental governance and repair and has the advantages of simple preparation process, low cost, excellent product structural performance and the like.

The application belongs to the technical field of carbonyl sulfur hydrolysis catalysts, and discloses a high-efficiency sulfur-resistant catalyst for carbonyl sulfur hydrolysis, a preparation method and application thereof.The preparation method comprises the following steps: (1) preparing a porous ceramic carrier containing alumina, titanium dioxide and zirconium dioxide; (2) in-situ growing a metal organic framework material containing lanthanum, bismuth and cerium on the surface of the porous ceramic carrier by using a solvothermal method; (3) performing a calcination treatment on the porous ceramic carrier loaded with the metal organic framework material in an oxygen-containing atmosphere to obtain a catalyst precursor; and (4) performing a reducing gas plasma bombardment treatment on the catalyst precursor to obtain the high-efficiency sulfur-resistant catalyst.The high-efficiency sulfur-resistant catalyst has high-efficiency low-temperature activity, excellent sulfur resistance and long service life.

The invention provides an MgAl2O4 carrier as well as a preparation method and application thereof, and relates to the technical field of catalysts. The preparation method comprises the following steps: mixing urea, soluble aluminum salt, soluble magnesium salt, polydiene dimethyl ammonium chloride and water, and carrying out a hydrothermal reaction to obtain a precipitate; the molar ratio of the urea to the aluminum element in the soluble aluminum salt to the magnesium element in the soluble magnesium salt to the polydiene dimethyl ammonium chloride is 4.5: 2: 1: (1-2); and sequentially drying and calcining the precipitate, so as to obtain the MgAl2O4 carrier. The prepared MgAl2O4 carrier is used as a catalyst carrier to be used in a high-temperature and high-pressure methane and carbon dioxide dry reforming reaction, excellent stability is shown, and the MgAl2O4 carrier is evaluated for 230 h under the high-temperature and high-pressure conditions of 850 DEG C and 2 MPa, has no obvious difference in morphology before and after the reaction, has small change in specific surface area, and shows excellent mechanical strength and chemical stability.

The application provides a cordierite-based supported ozone catalyst and a preparation method and application thereof. The prepared supported ozone catalyst can well balance excellent COD removal rate and good mechanical properties when used for treating organic wastewater, especially high-salt organic wastewater in the field of coal chemical industry. The preparation method comprises the following steps: 1) pretreating porous cordierite in an acid solution, then cleaning and drying to obtain a carrier; 2) applying a coating liquid on the carrier, then drying to obtain a precursor; the coating liquid comprises an active component, silica sol and optional starch; the active component comprises MnO2 and optionally CeO2; the coating liquid also preferably comprises glass fiber and polyethylene glycol; 3) calcining the precursor at 100-150 DEG C to obtain a supported ozone catalyst with a coating layer formed on the carrier.

The invention relates to the technical field of air pollution control, in particular to a composite denitration catalyst and a preparation method and application thereof.The composite denitration catalyst comprises a mesoporous TiO2SiO2 composite microsphere carrier, and the mesoporous TiO2SiO2 composite microsphere carrier is loaded with a vanadium-free active component and a VMoW low-vanadium composite additive; wherein the TiO2SiO2 composite microspheres have a relatively large specific surface area and regular mesoporous channels, so that the dispersion and mass transfer of the active components are promoted while sufficient loading space is provided for the dispersion of the active components and the auxiliaries, and the catalytic reaction efficiency is improved; according to the vanadium-free active component, RE (rare earth element) Zr solid solution taking CexZr1-xO2 as a main component is used as a low-temperature activity and sulfur-resistant basis of the catalyst, a low-content VMoW composite additive is selectively loaded on the surface, an REZr solid solution VMoW composite active interface is formed to inhibit solid solution sintering at a high temperature, surface acidity is adjusted to expand a high-temperature activity window, and the sulfur-resistant performance of the catalyst is improved. Meanwhile, a V species microenvironment is cooperatively regulated and controlled with the REZr solid solution, generation and accumulation of sulfate are inhibited, and the problem that a single-system catalyst is poor in comprehensive performance is solved.

The application discloses the technical field of waste gas purification catalyst regeneration, and discloses a regeneration process of a low-temperature SCR denitration catalyst; the process comprises the following steps: after the deactivated catalyst is cleaned through ultrasonic cleaning, the deactivated catalyst is sequentially immersed in a chemical activation liquid and an oxidation treatment liquid for activation and oxidation treatment, then the deactivated catalyst is immersed in a water dispersion liquid containing tungsten-silicon heteropoly acid-zirconium titanium composite oxide core-shell structure material and polyvinylpyrrolidone, vacuum-assisted impregnation, drying and gradient temperature heat treatment are carried out, and a regenerated catalyst is obtained. The core-shell structure material is prepared by the following steps: synthesizing a titanium zirconium composite oxide carrier through a sol-gel method, loading cerium manganese active components through a coprecipitation method, modifying silicotungstic acid through a layer-by-layer self-assembly technology and surface silanization modification. The regenerated catalyst has the advantages of significant improvement in sulfur resistance and alkali metal poisoning resistance, simple process operation, low energy consumption and suitability for industrial application.

The application belongs to the technical field of denitration catalysts, and discloses a CO-SCR denitration catalyst, a preparation method and application thereof. The preparation method comprises the following steps: (1) placing a honeycomb cordierite in a muffle furnace for preliminary calcination to obtain a carrier; (2) immersing the carrier in a mixed solution containing an aluminum source and an alkaline nitrogen source for hydrothermal treatment, taking out the carrier after the hydrothermal treatment for washing and drying to obtain a surface modified carrier; (3) preparing a bottom coating liquid containing catalyst powder and a first pore-forming agent; preparing a surface coating liquid containing catalyst powder and a second pore-forming agent; wherein the average particle size of the first pore-forming agent is greater than that of the second pore-forming agent; (4) immersing the surface modified carrier in the bottom coating liquid for coating, after preliminary drying, immersing the surface modified carrier in the surface coating liquid for coating, and after drying treatment, obtaining a catalyst precursor; (5) performing calcination treatment on the catalyst precursor to obtain a CO-SCR denitration catalyst.

The invention discloses a method for removing sulfur-containing compounds in a crude oil-prepared cracked gas C3 fraction. The method comprises the following steps: contacting the crude oil-prepared cracked gas C3 fraction with a supported desulfurizer, wherein the load type desulfurizing agent comprises a carrier and a main active component loaded on the carrier; the main active component comprises alkali metal and / or alkaline earth metal; the carrier comprises elementary substances Ag, Ag2O, elementary substances Re and ReOx; reOx is a mixture of a plurality of Re oxides, x = n / 2, and n is 4, 6 or 7; the molar content of the elementary substance Re accounts for 30-45% of the total molar weight of Re in the carrier. The method provided by the invention can effectively remove low-carbon thioether and / or low-carbon mercaptan in the C3 fraction of the crude oil-prepared pyrolysis gas, has the advantages of low removal temperature, simple process, no additional reaction, no influence on downstream hydrogenation and separation processes, and energy consumption saving, and the desulfurizer can be repeatedly regenerated and used, and has long-period stable operation capability.