87results about How to "Good hydrothermal stability" patented technology

A phosphorus-modified ZSM-5 molecular sieve is characterized in that in a 31P MAS-NMR spectrogram, the chemical shift range of resonance signal peaks is 5-20 ppm, and after hydrothermal aging is carried out for 17 h under the conditions of 800 DEG C and 100% water vapor, the area ratio of the resonance signal peaks with chemical shifts of-30 + / -3 ppm to-40 + / -3 ppm is larger than 1; the phosphorus content retention rate of the molecular sieve after water washing is higher than 50%.

The invention discloses a Sm-doped modified Ni / de-USY catalyst for ammonia hydrogen production. The Sm-doped modified Ni / de-USY catalyst is prepared from the following raw materials in percentage by mass: 97.82%-98.85% of a USY molecular sieve, 0.5%-1.4% of a nickel compound and 0.22%-0.79% of a samarium oxide. The invention also discloses a preparation method of the Sm-doped modified Ni / de-USY catalyst for hydrogen production from ammonia, which comprises the following steps: performing hydrothermal pretreatment on the USY molecular sieve, performing acid treatment, and preparing the catalyst for hydrogen production from ammonia by utilizing an ultrasonic-assisted equivalent-volume impregnation method. The catalyst for hydrogen production from ammonia can efficiently decompose ammonia gas and is high in hydrogen production efficiency, and due to the fact that active metal is highly dispersed on the de-USY surface, high relative crystallinity is kept, and the pore channel structure of the complete Y molecular sieve is kept, the catalyst for hydrogen production from ammonia has high stability, and the catalytic effect can be prevented from being affected.

The invention belongs to the technical field of new energy, and particularly discloses a catalyst for catalyzing conversion of glucose into 5-hydroxymethylfurfural and a preparation method of the catalyst. The method is used for solving the problem of low HMF selectivity in the process of converting glucose into HMF. The preparation method comprises the following steps: firstly, synthesizing hollow mesoporous silicon spheres in the presence of absolute ethyl alcohol by taking hexadecyl trimethyl ammonium bromide as a structure-directing agent, ammonia water for providing an alkaline environment and tetraethyl orthosilicate as a silicon source of silicon dioxide; then, filling sucrose serving as a carbon source into the hollow meso-porous silicon spheres, and carbonizing and removing silicon to obtain meso-porous carbon microspheres; and finally, dipping the mesoporous carbon microspheres in a tin tetrachloride pentahydrate solution to prepare the tin-loaded mesoporous carbon microsphere catalyst. The catalyst has a large specific surface area, an excellent pore structure and good hydrothermal stability, has two acidic sites of Lewis acid and # imgabs0 # acid at the same time, and can efficiently catalyze conversion of glucose into HMF.

The invention discloses a preparation method of a multi-channel chabazite molecular sieve membrane. The high-performance chabazite molecular sieve membrane is prepared on a multi-channel carrier. The method comprises the following steps: (1) preparing a seed crystal; (2) coating a seed crystal layer on the multi-channel carrier; and (3) synthesizing the chabazite molecular sieve membrane by adopting a secondary growth method. By virtue of a multi-channel structure and specific pore channel characteristics, the prepared multi-channel chabazite molecular sieve membrane has high selectivity and can be used for accurately separating molecules with different sizes and properties. Meanwhile, rich transmission paths enable the membrane to have high flux, the permeation rate of substances is greatly improved, and compared with a single-channel molecular sieve membrane, the treatment capacity is remarkably improved.

The invention discloses a copper-zinc-nickel catalyst as well as a preparation method and application thereof. A carrier of the copper-zinc-nickel catalyst is a ZnO carrier and is loaded with an active component copper-nickel alloy; the loading capacity of the active component copper and nickel is 35-65% of the total mass of the catalyst; the molar ratio of copper to nickel is (8-16): 1; according to the catalyst, high loading and high dispersion of Cu-Ni effective substances are effectively realized, so that the activity of the catalyst is improved by improving active sites, and the particle size of metal is effectively reduced. The copper-zinc-nickel catalyst provided by the invention is especially suitable for hydrogen production by methanol liquid phase reforming, the hydrogen production rate can reach 30.64 [mu] mol.gcat <-1 >. S <-1 > under the condition of 180 DEG C, the hydrogen selectivity reaches 91.82%, and the CO selectivity is less than 9.12%; relates to the technical field of catalysts.

The invention discloses a super-hydrophobic metal organic framework composite material and a preparation method and application thereof, and the preparation method comprises the following steps: mixing an amino-modified ZIF material with polylactic acid with the number-average molecular weight of 1.0 * 105 g / mol to 2.5 * 105 g / mol, and carrying out amidation reaction to obtain the super-hydrophobic metal organic framework composite material. In the invention, the amino-modified ZIF material is modified by polylactic acid, so that the super-hydrophobic metal-organic framework composite material which is low in cost, good in hydrophobicity, good in stability, green and environment-friendly can be prepared, and the super-hydrophobic metal-organic framework composite material can be widely applied to wastewater treatment, air purification and sensor preparation; the method has potential application in the aspects of solving the greenhouse effect, industrial gas adsorption and separation, oil-water separation and the like, and has a good application prospect. The preparation method also has the advantages of simple process, convenience in operation, mild preparation conditions and the like, is suitable for large-scale preparation, and is convenient for industrial application.

The invention discloses a preparation method of a millimeter-scale alumina spherical carrier, which comprises the following steps: carrying out oil column molding on molding sol to obtain the spherical carrier, and adding basic aluminum chloride sol and an alumina seed crystal solution in the preparation process of the molding sol, the mass of the alumina seed crystal solution accounts for 0.1-15% of the mass of the basic aluminum chloride sol. According to the preparation method of the millimeter-scale alumina spherical carrier, the hydrothermal stability of the carrier is improved, and the shrinkage rate of the obtained alumina carrier is higher.

The invention belongs to the technical field of catalysts, and relates to a supported molybdenum carbide catalyst, which comprises a carrier and an active component, the carrier is an MY molecular sieve, and the active component is molybdenum carbide; and M is one or two of Co, Ni and Cu. The preparation method comprises the following steps: mixing a molybdenum source solution with the MY molecular sieve, drying, calcining, and carbonizing in a reducing mixed gas atmosphere to obtain the supported molybdenum carbide catalyst. The Y molecular sieve is good in hydrothermal stability, has a typical microporous structure, is relatively large in specific surface area, and can well disperse active substances, so that more active components are exposed on the surface and participate in the reaction, meanwhile, relatively small and relatively dispersed metal particles are obtained, and the metal particles can be effectively prevented from being in contact with molybdenum carbide; and on the other hand, the metal M is beneficial to H2 activation, the dissociation capacity of H2 is improved, and hydroxyl remaining on the surface of molybdenum carbide in the reaction process can be removed.

The present invention relates to the technical field of nitrogen oxide gas purification, and in particular to a palladium-containing RHO zeolite nitrogen oxide adsorbent and a preparation method thereof. When the adsorbent is subjected to in-situ adsorption infrared analysis, the adsorbent has a peak value of 1840-1900cm ‑1 The infrared absorption peak intensity at 1780~1840cm ‑1 The ratio of the infrared absorption peak intensity at the position is greater than 0.9. The adsorbent contains at least silicon, aluminum and oxygen as skeleton atoms, wherein the molar ratio of silicon atoms to aluminum atoms is (2-50):1. The palladium in the adsorbent accounts for 0.1-5.0% of the mass of the RHO zeolite. The adsorbent not only has a high NO x It has high storage capacity and higher hydrothermal stability, and can be used as a PNA material to meet the actual needs of motor vehicle exhaust purification.

The invention discloses a carbon-coated copper catalyst as well as a preparation method and application thereof, and relates to the technical field of catalysts. According to the technical scheme, beta cyclodextrin is used as a carbon source, so that active component copper-containing particles are uniformly distributed on a carbon coating layer; wherein a carbon coating layer derived after cyclodextrin pyrolysis can effectively inhibit migration and agglomeration of copper active sites, so that the catalyst has relatively high selectivity and relatively good reaction activity, and the catalytic performance of the catalyst is promoted to be improved; the carbon-coated copper catalyst is suitable for catalyzing an ethanol water phase reforming hydrogen production reaction, the hydrogen production rate reaches 35.6 [mu] mol H2 / gcat / s, the hydrogen selectivity is higher than 99.9%, and long-time continuous and stable operation of ethanol water phase reforming hydrogen production can be ensured.

The invention discloses a methane reforming catalyst capable of improving hydrothermal resistance as well as a preparation method and application of the methane reforming catalyst, and belongs to the technical field of catalyst preparation. According to the catalyst, a modified HAP-Ce composite carrier is prepared through coprecipitation, hydrothermal treatment and calcination, metal precursor salt serves as a modification component, Ni is impregnated and loaded, calcination is conducted, and then water vapor / nitrogen high-temperature hydrothermal treatment and hydrogen reduction are conducted to obtain the target catalyst. According to the catalyst, a heterogeneous metal oxide composite interface is constructed in situ, stable pinning of Ce species is achieved, and the Ni anchoring effect is enhanced, so that Ce migration and Ni sintering under the hydrothermal condition are inhibited, and high reaction activity, excellent carbon deposition resistance and good hydrothermal stability are shown; the preparation method has the advantages of controllable conditions and simple steps, and is easy for large-scale production and application.

The invention provides a grease hydrodeoxygenation catalyst and a preparation method and application thereof, the preparation method comprises the following steps: mixing an aluminum-containing inorganic porous material, an acidic solution, an extrusion aid, a magnesium salt and a nickel salt, then carrying out extrusion molding to obtain a carrier precursor, and drying and roasting the carrier precursor to obtain a hydrodeoxygenation composite carrier; by taking the total weight of the carrier as 100%, the content of the magnesium element is 0.5-10%, and the content of the nickel element is 0.3-2%; dipping the hydrodeoxygenation composite carrier with a dipping solution containing active metal, and then drying and roasting to obtain the grease hydrodeoxygenation catalyst. When the hydrodeoxygenation composite carrier is prepared, magnesium salt and nickel salt are combined, and the hydrodeoxygenation composite carrier with a nickel-doped magnesium aluminate spinel structure can be obtained. The hydrodeoxygenation composite carrier has good hydrothermal stability and mechanical strength. The grease hydrodeoxygenation catalyst prepared by loading an active metal component on the hydrodeoxygenation composite carrier is stable in deoxygenation activity and excellent in deoxygenation effect.

This invention discloses a coal tar hydrogenation catalyst, its preparation method, and a coal tar hydrogenation process. The preparation method comprises: (1) treating an organic polymer to obtain material A; (2) mixing material A, boehmite powder, and an aqueous solution of the polymer and molding it to obtain a carrier precursor; (3) heat-treating the carrier precursor, then mixing it with a soluble nickel salt solution and drying and calcining it to obtain a modified carrier; and (4) introducing an active metal component onto the modified carrier and drying and calcining it to obtain the coal tar hydrogenation catalyst. This invention also provides a coal tar hydrogenation catalyst prepared by the above method, and a coal tar hydrogenation process. The catalyst has high tolerance to metal impurities, high water resistance, hydrogenation demetallization activity, and stability, and can meet the requirements for catalyst indicators during long-term stable operation of the hydrogenation unit.

The invention belongs to the technical field of catalyst preparation and thermocatalytic degradation of VOCs (Volatile Organic Compounds), and relates to a Pd / Ti / CeO2 toluene thermocatalytic degradation catalyst with sulfur resistance. According to the catalyst, CeO2 is used as a carrier, noble metal Pd is used as an active component, and the sulfur resistance is improved by doping Ti into the CeO2 carrier. The preparation process is a two-step wet impregnation method and comprises the following steps: 1) adding a certain amount of CeO2 carrier and water into a titanium precursor ethanol solution, carrying out oil bath evaporation at 80 DEG C to obtain white precipitate, drying and roasting to obtain a Ti / CeO2 carrier; and 2) dispersing the Ti / CeO2 carrier into a solution with water, adding a Pd precursor salt solution with a certain concentration, uniformly stirring, evaporating to dryness, drying, and roasting to obtain the Pd / Ti / CeO2 catalyst. The catalyst provided by the invention is simple in preparation method, low in noble metal loading capacity, high in VOCs thermocatalytic degradation efficiency and high in sulfur resistance, and has a huge application prospect in the aspect of treating VOCs waste gas with high sulfur content.

The invention provides a hydrodeoxygenation composite carrier and a preparation method and application thereof.The preparation method comprises the steps that an aluminum-containing inorganic porous material, an acid solution, an extrusion aid, magnesium salt and nickel salt are mixed and then subjected to extrusion molding to obtain a carrier precursor, and the carrier precursor is dried and roasted to obtain the hydrodeoxygenation composite carrier; the total weight of the hydrodeoxygenation composite carrier is 100%, and the content of the magnesium element is 0.3-8%, and the content of the nickel element is 0.3-1%. The hydrodeoxygenation composite carrier provided by the invention has hydrothermal resistance and higher mechanical strength, and can improve the hydrothermal stability of a grease hydrodeoxygenation catalyst taking the hydrodeoxygenation composite carrier as a carrier in the hydrodeoxygenation process, thereby improving the deoxygenation effect of the grease hydrodeoxygenation catalyst.

The invention discloses a carbon-coated copper-nickel bimetallic catalyst as well as a preparation method and application thereof. According to the technical scheme, the carbon-coated copper-nickel bimetallic catalyst comprises active components Cu and Ni and a carbon carrier coating Cu and Ni, the loading amount of Cu is 20.23-23.53% of the total weight of the catalyst, the loading amount of Ni is 2.13-3.86% of the total weight of the catalyst, and the balance is the carbon carrier; according to the catalyst provided by the invention, the reaction activity of the catalyst can be effectively improved, it is ensured that the catalyst has high reaction activity in hydrogen production through ethanol water phase reforming, long-time continuous and stable operation of hydrogen production through ethanol water phase reforming can be ensured, and the catalyst belongs to the technical field of catalysts.

This invention discloses a catalyst for the production of ethylene and propylene, its preparation method, and its applications. The catalyst comprises the following components: I) 1%–10% of chemical formula A x B y D z A compound of O4; in the chemical formula, the oxidation states of elements A, B, and D are m, n, and p, respectively, satisfying x·m + y·n + z·p = 8, where m, n, and p are integers not greater than 3; the A x B y D z O4 has a spinel structure; II) 0.5%–10% is selected from at least one oxide of rare earth elements, P, Mo, and W; III) 20.0%–55.0% is selected from at least one zeolite of ZSM-5 and ZSM-11; IV) 10%–30% is a binder; V) 25.0%–60.0% is clay. This catalyst is used in the catalytic cracking of petroleum hydrocarbons to produce ethylene and propylene, and features good catalyst stability, low methane yield, and high ethylene and propylene yields.

The invention relates to a catalytic cracking reaction method, which is characterized in that hydrocarbon oil is contacted with a mixture of a cracking catalyst and an auxiliary agent under catalytic cracking reaction conditions, and the auxiliary agent takes the dry basis weight of the auxiliary agent as a reference; the phosphorus-modified ZSM-5 molecular sieve is composed of 20-80% by dry basis of a phosphorus-modified ZSM-5 molecular sieve, 1-70% by dry basis of an inorganic binder and 2-60% by dry basis of clay, after the phosphorus-modified ZSM-5 molecular sieve is subjected to hydrothermal aging for 17 h under the conditions of 800 DEG C and 100% water vapor, the electron binding energy of phosphorus in phosphorus species on the surface of the molecular sieve is 135.2 eV, and the crystal retention degree in XRD analysis is 70-110%.

The invention discloses a method for simultaneously synthesizing diphenylmethane compounds and benzophenone compounds by catalyzing diphenylmethanol compounds through zeolite, and belongs to the technical field of organic synthetic chemistry. The invention uses an acidic zeolite molecular sieve as a catalyst, does not need to add any solvent, and uses diphenylmethanol as a raw material to undergo a disproportionation reaction in a nitrogen or air atmosphere to complete the synthesis of benzophenone and diphenylmethane. The invention prepares benzophenone and diphenylmethane simultaneously by disproportionating diphenylmethanol. The reaction conditions are mild and the process route is simple, and the invention is an efficient synthesis method.

This invention discloses a composite Li-Ca-Ce-LSX hydrophobic molecular sieve, its preparation method, and its applications. The method further modifies Li-LSX molecular sieves with Ca and Ce, synthesizing the composite Li-Ca-Ce-LSX hydrophobic molecular sieve via an aqueous solution exchange method. The preparation method of this invention is simple, and the obtained composite Li-Ca-Ce-LSX hydrophobic molecular sieve has a particle size of 0.2~0.4 mm, exhibits good crystallinity and adsorption performance, high polarizability, high adsorption capacity for nitrogen and nitrogen-oxygen separation coefficient, and a certain degree of hydrophobicity. This significantly improves the molecular sieve's environmental sensitivity and extends its service life. It can be used as a high-efficiency catalyst, heavy metal ion adsorbent, and concrete additive, with a wide range of applications.

The application discloses a method for quickly regulating layer spacing of a layered molecular sieve and application thereof. The method is characterized by using tetraethyl silicate condensate, tetrabutyl titanate silane and ferrocene silane as intercalation reagents, making a carrier gas carry vaporized intercalation reagents to flow through a reactor loaded with the layered molecular sieve, making the carrier gas carry vaporized deionized water to flow through the reactor loaded with the layered molecular sieve, and then performing calcination on the layered molecular sieve to obtain a pillared post-molecular sieve with good thermal stability. The application adopts gas phase pillaring, and has the advantages of simple preparation method, mild conditions, small amount of raw materials, simple steps, high yield, easy scale production, and the like. The intercalation reagent improves the high-temperature tolerance of the original layered molecular sieve, and at the same time, a plurality of active sites and places for adsorption of reactants are introduced at one time. The pillared post-molecular sieve is used in a reaction of preparing epoxycyclooctane by oxidizing cyclooctene with hydrogen peroxide, and the reaction has a cyclooctene conversion rate of 43% or more and an epoxycyclooctane selectivity of 65% or more.

The invention relates to a precious metal three-way catalyst as well as a preparation method and application thereof. The precious metal three-way catalyst comprises an alumina carrier, a cerium-zirconium solid solution and an active component M1, metal M2 is also loaded on the alumina carrier; the cerium-zirconium solid solution covers the surface of the alumina carrier, and the active component M1 is dispersed on the surface of the cerium-zirconium solid solution; the active component M1 comprises any one or a combination of at least two of Rh, Ir or Ru; the metal M2 comprises a combination of at least two of Pd, Pt, Rh or Au; the active component M1 and the metal M2 comprise at least three different elements. The noble metal three-way catalyst provided by the invention is used for degrading CO, NOx and CH3OH in an equivalent combustion mode, and is good in low-temperature activity, good in hydrothermal stability, relatively small in performance difference after hydrothermal aging, and wide in application prospect.

A phosphorus-modified MFI-structured molecular sieve, which is characterized in that the molecular sieve has a K value, satisfying: 70% ≤ K ≤ 90%; for example, 75% ≤ K ≤ 90%; further for example, 78% ≤ K ≤ 85%; wherein, the K value is as defined in the specification; the present invention also relates to a cracking auxiliary or cracking catalyst comprising the phosphorus-modified MFI molecular sieve, and a process of preparing the same and use thereof.

The invention discloses a granular tail gas combustion catalyst, a preparation method thereof and a tail gas purification method. The granular catalyst comprises the following components: active components comprise Pt, Bi, La and Hf, a carrier comprises powdery Al2O3 and granular Al2O3, and the powdery Al2O3 is obtained by mixing and roasting alpha '-AlOOH and rho-Al2O3. The preparation method comprises the following steps: impregnating and loading the active component on powdery Al2O3, preparing the impregnating liquid into slurry, and coating granular Al2O3 with the slurry to obtain the catalyst. The addition of Bi, La and Hf inhibits the agglomeration of noble metal particles, the powdery Al2O3 has high hydrothermal stability, and the catalyst has excellent stability and long service life when being used in the fixed bed tail gas catalytic combustion reaction.

The invention relates to the technical field of automobile exhaust purification and discloses a catalytic oxidation catalyst as well as a preparation method and application thereof. The invention relates to a catalytic oxidation catalyst, which comprises a carrier, a first coating and a second coating, the carrier is a regular structure carrier; the first coating comprises first cerium-zirconium composite oxide and / or first modified aluminum oxide and first precious metal, and the first precious metal is Pd and / or Pt; the second coating comprises at least one of a transition metal oxide, a second cerium-zirconium composite oxide and a second modified alumina, and a second noble metal, the second noble metal is Pd or Pt, the total amount of the first noble metal and the second noble metal is not higher than 20g / cft by element on the basis of the total amount of the catalyst, and the catalyst does not contain a molecular sieve. According to the catalyst, coating distribution is optimized based on reaction chemical characteristics in the tail gas treatment process, the effect of reducing the total content of precious metal is achieved, and wide application prospects are achieved.

The invention provides a layered silicate material, a silicate molecular sieve and a preparation method and application thereof, and belongs to the technical field of molecular sieves. According to the layered silicate material provided by the invention, the ratio of Si to heteroatoms is highly adjustable, the layered silicate material has good thermal stability and hydrothermal stability, a 12-membered ring opening is formed in a silicate layer, and the layered silicate material can be used as a precursor for preparing a molecular sieve to generate a three-dimensional silicate molecular sieve through topological condensation; the monolayer silicate nanosheet can also be obtained through layer stripping treatment and is used for preparing an oriented film, an adsorbent, a catalyst, an ion exchanger, a nanofiltration material or a seawater desalination film and the like. The framework of the silicate molecular sieve provided by the invention has eight topology independent atoms, the crystal structure of the silicate molecular sieve has a 12 * 12 * 12-membered ring three-dimensional cross duct system, and the silicate molecular sieve can be used as a catalyst, an ion exchanger or an adsorbent.

The invention discloses a composite modified ZSM-5 molecular sieve and a preparation method thereof. The composite modified ZSM-5 molecular sieve comprises a phosphorus oxide, manganese oxide and a B-Al-ZSM-5 molecular sieve, and the absolute value of the difference between the crystal bulk phase silica-alumina ratio measured by XRF and the crystal surface silica-alumina ratio measured by EDS of the composite modified ZSM-5 molecular sieve is less than or equal to 1. The preparation method of the composite modified ZSM-5 molecular sieve comprises the following steps: impregnating a B-Al-ZSM-5 molecular sieve with a phosphorus-containing compound, and impregnating with a manganese-containing compound to obtain the composite modified ZSM-5 molecular sieve. The B, P and Mn three-element composite modified molecular sieve is prepared in the absence of a template agent and an organic additive, can be used in catalytic cracking, catalytic cracking and other reactions, and has the characteristics of high conversion rate, good low-carbon olefin selectivity and the like.

The invention belongs to the technical field of antibacterial composite coatings and discloses a method for preparing an antibacterial composite coating by filling micro-arc oxidation titanium alloy plate micropores with a nano Ag / ZSM-5 molecular sieve and the antibacterial composite coating. The method comprises the following steps: pretreating the surface of a titanium alloy plate by adopting a micro-arc oxidation technology; nano ZSM-5 molecular sieve crystal grains are prepared through in-situ hydrothermal synthesis, Ag is loaded on a nano ZSM-5 molecular sieve through an ion exchange method to obtain a nano Ag / ZSM-5 molecular sieve, the nano Ag / ZSM-5 molecular sieve is filled in holes of a titanium alloy plate subjected to micro-arc oxidation, the filled titanium alloy plate is subjected to secondary hydrothermal hole sealing, and the antibacterial composite coating is obtained. The micro-arc oxidation titanium alloy and the nano Ag / ZSM-5 molecular sieve are combined to form the antibacterial composite coating, the titanium alloy plate is functionalized, the wear resistance and corrosion resistance are improved, the performance of the titanium alloy plate is further improved, the problem of holes or microscopic cracks of a micro-arc oxidation film layer is solved, and the service life of the titanium alloy plate is prolonged. The device serves as a convenient channel for permeation, conveying and diffusion of corrosive media in the environment.

This invention provides a catalyst coated with a non-precious metal coating on a support and its preparation method. The invention also relates to the application of this non-precious metal coated-supported catalyst in the catalytic oxidation treatment of volatile organic compounds (VOCs). The catalyst of this invention has high mechanical strength, good coating wear resistance, and is not easily detached. Furthermore, the catalyst exhibits strong hydrothermal stability, good catalytic degradation performance of volatile organic compounds, and a long service life, making it particularly suitable for the treatment of VOCs containing sulfides.

The present invention provides a ZSM-23 zeolite and a preparation process thereof. The pore volume of mesopores having a pore size of 3-8 nm of the zeolite is 45-90% of the total pore volume of the zeolite. The zeolite has a relative crystallinity of 95-120%, and the zeolite has a relative crystallinity retention of 95-100% after a hydrothermal treatment with steam for 2 hours at 600°C. The process for preparing the zeolite comprises the following steps: (1) preparing or selecting a silicon source for preparing the ZSM-23 zeolite, such as amorphous silica; (2) performing an alkali treatment on the silicon source for preparing the ZSM-23 zeolite such as amorphous silica mentioned in step (1); and (3) preparing the ZSM-23 zeolite by using the alkali-treated amorphous silica as the silicon source. The ZSM-23 zeolite has a rich mesoporous structure and good hydrothermal stability.