126 results about "Octane" patented technology

Provided herein are substituted 6-azaspiro[2.5]octane-6-carboxylic acid 1,1,1,3,3,3- hexafluoropropan-2-yl ester compounds and pharmaceutical compositions comprising the same. The compounds and compositions provided herein are useful as inhibitors of MAGL. Further, the compounds and compositions as provided herein are useful in the treatment of diseases and disorders that benefit from the inhibition of MAGL.

The invention discloses a cross-linked polystyrene anion exchange membrane as well as a preparation method and application thereof. The preparation method of the cross-linked polystyrene anion exchange membrane comprises the following steps: firstly, taking styrene and p-chloromethyl styrene as monomers, and obtaining a copolymer through bulk polymerization under the action of an initiator; the preparation method comprises the following steps: firstly, preparing a copolymer from polystyrene, then preparing a membrane casting solution from the copolymer and 1, 4-diazabicyclo [2.2. 2] octane, casting to form a membrane, then immersing the obtained membrane into a trimethylamine aqueous solution for complete quaternization, and finally treating in a KOH aqueous solution to obtain the cross-linked polystyrene anion exchange membrane. The invention provides an application of the cross-linked polystyrene anion exchange membrane in alkaline electrolyzed water. The anion exchange membrane is simple in synthesis process, reagents are cheap and easy to obtain, the contradiction between the OH <-> conductivity and the size stability of a traditional anion exchange membrane can be greatly balanced, and meanwhile the anion exchange membrane has high alkaline stability and shows excellent electrolytic performance in alkaline electrolyzed water.

The application discloses a kind of piperazine compound polyoxyethylene ether composition and preparation method thereof, it is related to polyoxyethylene ether material technical field.The piperazine compound polyoxyethylene ether composition includes the following weight parts of raw materials: piperazine compound polyoxyethylene ether 30-40 parts, antioxidant 1-1.5 parts, deionized water 35-45 parts.The application is generated intermediate 1 by 1,4-di (2-chloroethyl) piperazine and 3,3,4,4,5,5,6,6,7,7,8,8,8-tridecafluoro-1-octane amine reaction;Intermediate 1 and 8-chlorooctanoic acid reaction generate intermediate 2;Intermediate 2 and lauryl alcohol polyoxyethylene ether reaction generate piperazine compound polyoxyethylene ether.The piperazine compound polyoxyethylene ether composition prepared by the application has good surface tension and chemical corrosion resistance.

The present invention relates to use of a pharmaceutical composition for multiple myeloma containing 5-fluoro-2-[(4-{7-[(1S,3S,4R)-5-methylidene-2-azabicyclo[2.2.2]octane-3-carbonyl]-2,7-diazaspiro[3.5]nonan-2-yl}pyrimidine-5-yl)oxy]-N,N-di(propan-2-yl)benzamide.

The invention discloses 4, 5-bis (fluorine gem dinitro)-1, 2, 3-triazole and a preparation method thereof, and the preparation method specifically comprises the following steps: step 1, adding 4, 5-bis (fluorine gem dinitro)-1, 2, 3-triazole potassium salt, 1-chloromethyl-4-fluoro-1, 4-diazotized bicyclic 2.2. 2 octane bis (tetrafluoroborate) salt and a reaction solvent into a reactor, and stirring until the materials are completely dissolved; 2, after dissolving is completed, reacting at room temperature; and 3, after the reaction is finished, spin-drying the solvent to obtain a solid, dissolving the solid by using an organic solvent, filtering, and concentrating to obtain a colorless liquid 4, 5-bis (fluorine gem dinitro)-1, 2, 3-triazole. The calculated density of the 4, 5-bis (fluorine gem dinitro)-1, 2, 3-triazole is large, the density of the 4, 5-bis (fluorine gem dinitro)-1, 2, 3-triazole is 2.01 g / cm < 3 >, and the theoretical density of 5-amino-3-nitro-1, 2, 4-triazole and the theoretical density of 3, 5-dinitro-1, 2, 4-triazole compounds in comparison files are 1.82 g / cm < 3 > and 1.83 g / cm and are improved by 10.4% and 9.8%.

The application relates to the technical field of desulfurizers, and particularly discloses a rare earth metal oxide desulfurizer and a preparation method thereof. The preparation method comprises the following steps: S1: dissolving cerium salt, lanthanum salt and glucose in water to obtain solution A; S2: impregnating pre-calcined gamma-Al2O3 with the solution A, drying, calcining at 300-400 DEG C for 2-4 hours, cooling, and obtaining a loaded substance A; S3: dissolving copper salt, nickel salt and citric acid in water to obtain solution B; S4: impregnating the loaded substance A with the solution B, drying, calcining at 450-550 DEG C for 2-4 hours, cooling, and obtaining a loaded substance B; and S5: placing the loaded substance B in a reducing atmosphere, heating to 300-400 DEG C, keeping for 2-3 hours, cooling, and obtaining the rare earth metal oxide desulfurizer. The rare earth metal oxide desulfurizer prepared by the application has relatively high desulfurization efficiency and octane value RON retention rate.

The invention relates to the technical field of high-octane gasoline preparation and carbon dioxide conversion, in particular to application of a composite catalyst in preparation of high-octane gasoline by coupling crude oil and carbon dioxide. The invention provides application of a composite catalyst in preparation of high-octane gasoline by coupling crude oil and carbon dioxide. The composite catalyst comprises a metal modified molecular sieve and active metal and / or active metal oxide, the content of acid in the metal modified molecular sieve is greater than or equal to 0.1 mmol / g, and the acid in the metal modified molecular sieve comprises Bronsted acid and Lewis acid. The composite catalyst catalyzes crude oil and carbon dioxide to be coupled, and the purpose of large-scale preparation of high-octane gasoline can be achieved.

The application belongs to the technical field of leveling agents, and specifically discloses a fluorosilicon wetting leveling agent, a preparation method and application thereof. In the application, dimethylethoxysilane, 1,8-bis(triethoxysilane) octane and polyethyl silicate are subjected to hydrolysis reaction and polymerization reaction to obtain a polymerization liquid; then, the polymerization liquid, double-end side-chain vinyl silicone oil and hydrogen-containing fluorosilicone oil are subjected to a silicon-hydrogen addition reaction to prepare the fluorosilicon wetting leveling agent. The fluorosilicon wetting leveling agent has excellent leveling performance, can effectively reduce surface tension, and can improve the smoothness of a coating film and the stability of paint.

This invention discloses a novel method for preparing a clean fuel additive, relating to the field of clean fuel additive technology. Its components include: a main cleaning agent: Mannich base; a dispersant: polyetheramine; a surfactant: highly active polyisobutylene; an antioxidant: N,N-di-sec-butyl-p-phenylenediamine; an octane booster: dimethyl carbonate; a solvent: 120# solvent oil; a combustion improver: C9-C11 mixed olefins; a stabilizer: trimethylolpropane; an ignition promoter: nitrobenzene; and auxiliary additives: n-dodecane, sodium polystyrene sulfonate, and eugenol methyl ether. This invention achieves a significant synergistic effect among the core components such as Mannich base, polyetheramine, polyisobutylene, amine antioxidants, and dimethyl carbonate. This synergistic effect allows the additive to comprehensively optimize the cleanliness, anti-knock properties, stability, and combustion efficiency of fuel at a relatively low total addition amount.

The present application relates to the technical field of aviation gasoline, and discloses unleaded aviation gasoline and a preparation method thereof.The unleaded aviation gasoline comprises: 75-85 wt% of polymethylbenzene, and 15-25 wt% of at least two of alkylate, a side line distillation component of an alkylate device, light naphtha and isopentane; wherein the motor octane number of the polymethylbenzene is not less than 108.The product quality index of the unleaded aviation gasoline meets the standard of the American Society for Testing and Materials, that is, the technical requirement of ASTM D7719-2018 high-aromatic unleaded aviation gasoline.The unleaded aviation gasoline has the characteristics of good component continuity, stable combustion and high motor octane number, and meets the high-standard use requirement of unleaded and high-octane aviation gasoline.

This invention belongs to the field of petroleum extraction technology, specifically relating to a high-temperature resistant oil displacement agent and its preparation method. The method includes: in a nitrogen-filled reactor, under the action of a catalyst, trimethylolpropane allyl ether and 1,1,1,2,2,3,3,4,4,5,5,6,6-tridecylfluoro-8-iodooctane undergo an addition reaction; next, a sulfonation reaction occurs with chlorosulfonic acid; and finally, a substitution reaction occurs with dodecylamine to obtain the product oil displacement agent. The molar ratio of 1,1,1,2,2,3,3,4,4,5,5,6,6-tridecylfluoro-8-iodooctane, chlorosulfonic acid, dodecylamine, and trimethylolpropane allyl ether is 0.8-1.2:1.8-2.4:0.8-1.2:1. The molecular formulas of the main components of the oil displacement agent are as follows: [Insert molecular formula here]. This invention's high-temperature resistant oil displacement agent features low interfacial tension, good temperature resistance, and a high degree of enhanced oil recovery.

The invention relates to a method for producing gasoline by ethylene oligomerization, which comprises the following steps: contacting an ethylene-containing raw material with an oligomerization catalyst to carry out oligomerization reaction to obtain an oligomerization reaction material; wherein the oligomerization catalyst comprises an FER structure molecular sieve; carrying out gas-liquid separation on the oligomerization reaction material to obtain a gas product and a liquid product; and separating the liquid product to obtain gasoline. According to the method, the oligomerization catalyst containing the FER structure molecular sieve is used for catalyzing ethylene oligomerization, the yield of gasoline in the obtained oligomerization product is high, the content of olefin in gasoline can be obviously increased, and the content of aromatic hydrocarbon can be reduced; the light gasoline obtained by separating the obtained gasoline product mainly comprises C5-C6 components, the total content of olefin and isoparaffin in the C5-C6 components is more than 90 wt%, and the light gasoline is suitable for being used as a blending component of high-octane gasoline.

The invention discloses a preparation method of a gasoline selective hydrogenation catalyst, which comprises the following steps: (1) impregnating a carrier with an impregnation liquid containing active metals Mo and Co, and drying to obtain a first-stage hydrodesulfurization catalyst; (2) impregnating the first-stage hydrodesulfurization catalyst obtained in the step (1) with an impregnation liquid containing alkali metal and / or alkaline earth metal, and drying to obtain a second-stage hydrodesulfurization catalyst; and (3) roasting the second-stage hydrodesulfurization catalyst obtained in the step (2) under a CO and / or CO2 atmosphere condition with a certain concentration to obtain a finished product catalyst. The catalyst prepared by the method disclosed by the invention well inhibits an olefin saturation active center, is smaller in octane number loss when being applied to a gasoline selective hydrogenation process, and has higher desulfurization activity and selectivity.

The invention relates to the technical field of medicinal chemistry, in particular to a 2-methyl-2-azabicyclo [3.2. 1] octane derivative which has a structure as shown in a general formula I or a general formula II or pharmaceutically acceptable salt, solvate, hydrate, isomer or prodrug of the 2-methyl-2-azabicyclo [3.2. 1] octane derivative, and a preparation method and application of the 2-methyl-2-azabicyclo [3.2. 1] octane derivative. As an acetylcholine receptor agonist, the compound shows high activity and high selectivity to M3 receptor subtypes. In-vitro experiments show that under the concentration of 40 mu M, the receptor excitation rate of the compound (such as 9a, 10a and the like) exceeds 95%, and is obviously superior to that of a positive control drug Aceclidine (48.65%). Due to the characteristic, the compound can generate a powerful pupil contraction pinhole effect by efficiently exciting an eye iris M3 receptor so as to improve near vision, and meanwhile, stimulation to ciliary muscles and related side effects are expected to be reduced due to high selectivity of the compound.

This invention relates to the field of new energy and liquid carbon fuel technology, specifically to a high-cleanliness methanol alternative fuel for vehicles and its preparation method. The method includes raw material mixing and vaporization, atmospheric pressure gas-phase catalysis, and multi-stage condensation and separation steps. The method combines base methanol with hydrocarbon additives and introduces them into a composite mixed-bed molecular sieve catalyst containing aromatic cascade, etherification, and alkylation active units, as well as an anti-coking flow carrier. Its core principle is to enhance the octane number by following the atmospheric pressure gas-phase aromatization and cascade mechanism, generate ethers in situ as phase stabilizers and hydrogen bonding agents, and utilize a mesoporous carrier to reduce steric hindrance and promote macromolecular desorption. This invention differs from the high-pressure reaction conditions of traditional methanol-to-gasoline processes by overcoming the defects of methanol fuel phase separation upon contact with water and catalyst coking through a one-step atmospheric pressure gas-phase conversion. It eliminates the need for physical co-solvents and significantly extends the catalyst regeneration cycle.

The invention provides a CAU-10-pydc membrane, a preparation method thereof and application of the CAU-10-pydc membrane in separation of hexane isomers. The preparation method comprises the following steps: mixing a metal salt, an organic ligand and a deprotonation agent in a solvent, and carrying out homogeneous reaction to obtain a CAU-10-pydc nanocrystal; cAU-10-pydc nanocrystals are dispersed on the surface of a supporting body, the supporting body is added into a reactor containing metal salt, an organic ligand, a deprotonation agent and a solvent to be subjected to a hydrothermal synthesis reaction, a CAU-10-pydc membrane is formed, and the membrane material has high integrity, durability and high compactness. The preparation method of the CAU-10-pydc film is simple and easy to operate, the synthesis condition is mild, the raw materials are green and low in cost, and the preparation method is suitable for large-scale production; when the CAU-10-pydc membrane is applied to separation of hexane isomers, separation of hexane isomers with low octane number and hexane isomers with high octane number can be realized.

The application discloses a gasoline selective hydrodesulfurization catalyst and a preparation method and application thereof. The catalyst comprises a hydrogenation metal component, an auxiliary component and a binder component; the hydrogenation metal component comprises at least one of a group VIB metal and a group VIII metal; the content of the group VIB metal in the form of an oxide is 50.0wt%-65.0wt% based on the weight of the catalyst; the content of the group VIII metal in the form of an oxide is 10.0wt%-25.0wt%; the content of the auxiliary component in the form of an oxide is 1.0wt%-8.0wt%; the content of the binder component in the form of an oxide is 10.0wt%-30.0wt%; and the average pore diameter of the catalyst is 6.0-8.0nm. The catalyst is suitable for FCC gasoline hydrodesulfurization, can meet the requirement of producing clean gasoline with a sulfur content ≯10μg / g under the condition of high space velocity and low hydrogen / oil volume ratio with a small octane loss.

A gasoline fuel composition for a spark-ignition internal combustion engine, the gasoline fuel composition comprising (a) renewable naphtha at a level of 40% to 60% volume / volume, (b) an oxidized hydrocarbon at a level of 15% to 25% volume / volume, and (c) an aromatic hydrocarbon at a level of 25% to 45% volume / volume, 5 wherein the gasoline fuel composition has an RON of 87 or greater. Although the low octane number of renewable naphtha typically strictly limits its blendability in gasoline to a low level, the fuel composition of the invention allows the use of renewable naphtha at significant levels while maintaining a good octane rating for the entire composition.

The present application belongs to the field of gasoline additive, and particularly relates to an environment-friendly gasoline antiknock agent and a preparation method thereof. The antiknock agent comprises two newly designed modified compounds: 3,5-di-tert-butyl phenyl carborane carboxylate and 2-(dicyclohexyl phosphino)-1,2-oxaborinin-4-carboxylic acid iso-octyl ester. In the preparation, a cosolvent is first added into a reactor, and then the two modified compounds, polyisobutylene amine, isobutyl acetate and dimethyl malonate are sequentially added under an inert atmosphere. After mixing by continuous stirring, the temperature is raised, an antioxidant is added, and then stirring is continued. Finally, the product is obtained by cooling and filtering. The two modified compounds are prepared by condensation reaction of carborane carboxylic acid and steric phenol, esterification of oxaborinin carboxylic acid and iso-octanol, and then phosphination reaction. The antiknock agent does not contain metal elements, has biodegradable characteristics, can significantly improve the octane number of gasoline and reduce engine deposits and harmful gas emissions, and meets the green environmental protection requirements.

The application discloses high-silicon EMT molecular sieve and a synthesis method and application thereof, and belongs to the technical field of molecular sieves. The synthesis method of the EMT molecular sieve comprises the following steps: a) mixing an aluminum source Al 1 , a silicon source Si 1 , an alkali metal source M 1 , an organic template agent R 1 and water to obtain raw material I, and obtaining a directing agent after aging of the raw material I; b) mixing an aluminum source Al 2 , a silicon source Si 2 , an alkali metal source M 2 , an organic template agent R 2 and water to obtain raw material II, namely, an initial gel; c) adding the directing agent into the initial gel, stirring uniformly, and placing in a sealed reaction kettle to perform crystallization, so that the high-silicon EMT molecular sieve with an EMT topological structure is obtained. The EMT molecular sieve disclosed by the application has a high silicon-aluminum oxide ratio of 7-30, high crystallinity and purity, and good hydrothermal / thermal stability, and can be used in catalytic reactions such as production of high-octane gasoline through isobutane / 2-butene alkylation, and has important significance in actual chemical production.

A method is disclosed for producing small crystal forms of zeolite SSZ-81. The method includes forming a reaction mixture containing an alumina-coated silica sol, a source of an alkali metal, a structure directing agent containing 1,5-bis(N-methylpiperidinium)pentane dications and / or 1,5-bis(1-azonia-bicyclo[2.2.2]octane)pentane dications, a source of hydroxide ions, and water; and subjecting the reaction mixture to crystallization conditions sufficient to form crystals of the zeolite. The compositions made according to that method, as well as the various uses of the compositions, are also disclosed.

The invention relates to a preparation method of 4-oxa-7-azaspiro [2.5] octane-6-ketone, and belongs to the field of chemical synthesis of medicines. Hydrochloride of glycine ester is used as a starting material, and 4-oxa-7-azaspiro [2.5] octane-6-ketone is obtained through five steps of protecting group introduction, cyclization, condensation, protecting group removal and intramolecular cyclization reaction and serves as the starting material of the anti-influenza virus medicine and analogues of the anti-influenza virus medicine. The synthesis route is ingenious in design, the use of a palladium catalyst and a harmful reagent chloroacetyl chloride in the prior art is reduced or avoided, and the material cost and the production cost of the whole route are reduced by 70% or above compared with those of the prior art by improving the yield of the two key reactions of condensation and cyclization and simplifying the operation steps. The method is suitable for industrial application.

The invention discloses a preparation method of exo-8-oxo-bicyclo [3.2. 1] octane-3-carboxylic acid methyl ester, which comprises the following steps: carrying out deprotonation reaction on cyclopentanone under a strong alkali condition, and then carrying out ortho-alkylation reaction on the deprotonation product and 2-(bromomethyl) methyl acrylate to obtain 2-((2-oxo-cyclopentyl) methyl) methyl acrylate; 2-((2-oxocyclopentyl) methyl) methyl acrylate is subjected to a Michael addition cyclization reaction in a catalyst / organic solvent system, inner-8-oxobicyclo [3.2. 1] octane-3-carboxylic acid methyl ester is obtained, the reaction continues under the same conditions, and the inner-8-oxobicyclo [3.2. 1] octane-3-carboxylic acid methyl ester is obtained. And carrying out isomerization on the inner-8-oxo-bicyclo [3.2. 1] octane-3-carboxylic acid methyl ester until the inner-8-oxo-bicyclo [3.2. 1] octane-3-carboxylic acid methyl ester is completely converted into the outer-8-oxo-bicyclo [3.2. 1] octane-3-carboxylic acid methyl ester. The preparation method provided by the invention fills up the blank that the ex-8-oxo-bicyclo [3.2. 1] octane-3-carboxylic acid methyl ester cannot be synthesized in the prior art and the extrinsic derivative cannot be synthesized by using the extrinsic raw material in the actual research and development process.

The present application belongs to the field of enzyme catalysis and bioengineering technology, and relates to a cytochrome P450 enzyme CYP153C3 and application thereof. The amino acid sequence of the enzyme is shown in SEQ ID NO. 1 of the sequence listing. The nucleotide sequence of the DNA molecule encoding the enzyme is shown in SEQ ID NO. 2 of the sequence listing. The cytochrome P450 enzyme CYP153C3 provided by the present application has catalytic activity on C8-C14 chain length saturated fatty acids, various unsaturated fatty acids and short-chain alkanes (octane, decane); meanwhile, the enzyme shows excellent ω-1 hydroxylation capacity on saturated fatty acids, unsaturated fatty acids and alkane substrates, has high regioselectivity, and can be used for green bio-manufacturing of high-value hydroxyl fatty acids and hydroxyl alkane compounds.

The utility model discloses a self-gravity infrared system octane number standard fuel automatic sample matching device, which relates to the technical field of sample matching and comprises a sample matching frame, a supporting plate is arranged on one side of the inner top of the sample matching frame, a plurality of gallon barrels are arranged on the top of the supporting plate, and weight detection components are arranged at the bottoms of the gallon barrels. A plurality of measuring tubes are arranged on the other side of the top of the sample distribution frame, a mixing assembly matched with the measuring tubes is arranged on one side of the inner bottom of the sample distribution frame, and infrared detection devices matched with the mixing assembly are arranged at the two ends of the outer portion of the sample distribution frame. According to the utility model, the weight of materials in the gallon barrel can be monitored in real time, the accuracy of each-time sample preparation is ensured, according to weight data fed back by the weighing sensor, when the materials in the gallon barrel reach a fixed value of blanking, the pinch valve is opened through the controller, the materials are conveyed into the hose, and the materials naturally flow into the hose under the action of self-gravity, so that the sampling accuracy is ensured. And no additional pump or pressurization equipment is needed.

This invention relates to a method for preparing a catalyst for hydrotreating catalytic cracking gasoline, comprising the following steps: (1) mixing alumina powder and acidic molecular sieve, extruding, drying, and calcining to obtain a catalyst support; (2) preparing a co-impregnation solution containing a complexing agent and an active metal CoMo or NiMo, and adjusting the pH value of the co-impregnation solution to be greater than 8.1, preferably greater than 8.2, wherein the molar ratio of the complexing agent to Co or Ni in the co-impregnation solution is 1.2-2.2, preferably 1.5-1.7; (3) impregnating the catalyst support with an equal volume of the co-impregnation solution, and after aging and drying at room temperature, obtaining a one-impregnation, non-calcined semi-finished product; (4) sulfiding the one-impregnation, non-calcined semi-finished product in step (3) to obtain a hydrotreating catalyst. The obtained catalyst exhibits excellent comprehensive performance in deep desulfurization, significant reduction of olefins, and preservation of octane number for FCC gasoline.

The invention discloses a Pt1 / Co3O4 / GCN catalyst for photo-thermal synergistic catalytic oxidation of VOCs in catering industry and a preparation method thereof, and belongs to the technical field of environmental catalytic materials. The catalyst is Pt1 / Co3O4 / GCN of which a Pt single atom is anchored to Co3O4 / graphite phase carbon nitride. A Co3O4 nano block is derived through a Prussian blue analogue self-sacrifice template method, after electrostatic self-assembly with GCN is conducted, Pt monatomic is loaded through an in-situ ice crystal auxiliary photo-reduction method, and the Co3O4 / GCN composite material is prepared. According to the catalyst, high-efficiency degradation of typical catering oil fume long-chain alkane VOCs such as heptane and octane is realized. The preparation process of the catalyst is green, and the catalyst shows excellent low-temperature catalytic activity (T90% = 195 DEG C), stability and water resistance to high-concentration heptane (3000 ppm) under simulated sunlight.

The invention discloses thermoplastic polyamide as well as a preparation method and application thereof, and the preparation method comprises the following steps: mixing a carboxyl monomer, a hydroxyl monomer, 3, 6-dioxa-1, 8-octane dithiol, a catalyst and a solvent, carrying out sulfydryl-olefin click reaction under the protection of inert gas, and carrying out post-treatment to obtain the thermoplastic polyamide, wherein the structural formula of the carboxyl monomer is shown in the specification, and the structural formula of the hydroxyl monomer is shown in the specification; the mass ratio of the carboxyl monomer to the hydroxyl monomer to the 3, 6-dioxa-1, 8-octane dithiol is (9.7 to 14.2) to (1.3 to 5.2) to 5.5. The invention provides high molecular weight bio-based functional polyamide prepared through mercapto click polymerization, the polyamide has reactive side groups including carboxyl and hydroxyl, so that new chemical covalent bonds are formed in the high-temperature processing process, a polymer network is converted from a linear type to a cross-linked type, and further the cementing performance is enhanced.

The invention discloses a catalyst for improving an octane number in light naphtha isomerization and a preparation method of the catalyst. The catalyst comprises 40-70wt% of a carrier, 5-15wt% of a dispersing agent, 15-25wt% of a pore forming agent and 8-20wt% of transition metal, wherein the transition metal is based on the oxide thereof. The two active centers of the ZSM-5-5at-ZrO2 composite molecular sieve catalyst cooperate to catalyze cracking and alkylation, and due to the mesopores of the shell, the diffusion resistance is reduced, and the diffusion of reactants and products is accelerated, so that the ZSM-5-5at-ZrO2 composite molecular sieve catalyst has the characteristics of good accessibility of the catalytic active centers, high catalytic activity, good stability and the like.