844results about "Pentasil aluminosilicate zeolite" 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%.

A separation membrane for hydrogen and a gas L (excepting hydrogen), wherein the activation energy Ep(S) (kJ / mol) for a hydrogen permeance P(S) (mol / (m2∙s∙Pa)) through the separation membrane, as derived within a temperature Tam (°C) range satisfying the following expression (1-I), and the activation energy Ep(L) (kJ / mol) for a gas L permeance P(L) (mol / (m2∙s∙Pa)) through the separation membrane, as derived within the same temperature range, satisfy the following expression (1-II).　(1-I): 5(°C)≤Tam(°C)≤200(°C)　(1-II): |Ep(L)|<|Ep(S)|　The present invention can provide a separation membrane, a separation membrane layered body, a separation module or separation tower, a hydrogen recovery system, and a hydrogen separation and recovery method that are for separating and recovering hydrogen and in which hydrogen can be separated and recovered in a safe and highly efficient manner, even with a relatively low-pressure supply, from a mixed gas comprising molecules that are relatively close in kinetic diameter, one example being the separation and recovery of hydrogen from a hydrogen-oxygen mixed gas.

The invention relates to the technical field of ZSM-5 molecular sieve preparation, and provides a high-crystallinity aluminum-rich ZSM-5 molecular sieve as well as a preparation method and application thereof. According to the preparation method of the high-crystallinity aluminum-rich ZSM-5 molecular sieve provided by the invention, after the second aluminum source is added, secondary crystallization is carried out, so that the skeleton composition control of the ZSM-5 molecular sieve is realized, the technical bottleneck that the high-crystallinity aluminum-rich ZSM-5 molecular sieve is difficult to directly synthesize is solved, the lower limit of a Si / Al specific phase region of an artificial in-situ synthesized molecular sieve is broken through, and the preparation method is simple and convenient. The method effectively controls crystal parameters, improves production efficiency and realizes precise construction of the high-crystallinity aluminum-rich ZSM-5 molecular sieve, so that the microporous crystallinity of the molecular sieve is enhanced, the acid distribution of the molecular sieve is optimized, the metastable state surface active acid center distribution of the molecular sieve is greatly enriched, and the molecular sieve has good aromatic hydrocarbon conversion performance.

The invention discloses a preparation method of a nano HZSM-5 molecular sieve, and belongs to the technical field of nano molecular sieve preparation, the preparation method comprises the following steps: 1, adding a silicon source, an aluminum source and a template agent into a supercritical crystallization reaction kettle, heating, stirring, and carrying out a melting reaction on the raw materials to obtain a seed crystal mixed material; introducing absolute ethyl alcohol into the seed crystal mixed material obtained by the melting reaction, heating, stirring, and carrying out crystallization reaction to obtain a reaction product; and cooling, washing, drying and roasting the obtained reaction product to obtain the nano HZSM-5 molecular sieve. According to the present invention, the melting reaction and the supercritical ethanol crystallization reaction technology are introduced into the preparation of the nanometer HZSM-5 molecular sieve for the first time, and the prepared nanometer HZSM-5 molecular sieve has advantages of small grain size, uniform distribution, large specific surface area and high yield.

The invention discloses a preparation method of a mesoporous Zn-ZSM-5 molecular sieve for preparing aromatic hydrocarbon from methanol, and belongs to the technical field of synthesis of inorganic materials. Aiming at the problems that a conventional mesoporous Zn / ZSM-5 molecular sieve catalyst Zn blocks orifices, the mesoporous structure is disordered, the molecular sieve solid yield is low, a molecular sieve framework is seriously damaged and the like, the preparation method comprises the following steps: uniformly mixing zinc gluconate with an aluminum source, a silicon source and a template agent, putting the mixture into a closed reaction container, carrying out hydrothermal crystallization, and sequentially washing, drying and roasting to obtain the mesoporous Zn / ZSM-5 molecular sieve catalyst. The sodium type molecular sieve is obtained; the preparation method comprises the following steps: carrying out multiple ion exchange on a sodium type molecular sieve by using an ammonium chloride solution, and sequentially carrying out suction filtration, washing, drying and roasting to obtain the mesoporous Zn-ZSM-5 molecular sieve. According to the preparation method of the methanol-to-aromatic hydrocarbon Zn / ZSM-5 molecular sieve provided by the invention, the obtained molecular sieve is used in the methanol-to-aromatic hydrocarbon process, and has the characteristics of high carbon deposition resistance, high aromatic hydrocarbon selectivity, low Zn wastage rate and the like.

The invention discloses a method for preparing a molecular sieve by taking lithium slag as a raw material, which is characterized in that flotation tailings obtained by carrying out flotation separation on gypsum concentrate on lepidolite smelting slag are taken as a raw material, and the molecular sieve is prepared by a high-temperature alkali fusion-hydrothermal crystallization method. The method is low in cost and simple in process, the prepared molecular sieve is high in purity and crystallinity and good in adsorbability and can be widely applied to the fields of adsorbents, catalysts, drying agents and the like, gypsum in the lithium slag can be recycled, comprehensive utilization of the lithium slag is facilitated, economic and environment-friendly benefits are improved, and the application prospect is wide.

The invention discloses a short b-axis ZSM-5 molecular sieve as well as a synthesis method and application thereof, tetraethyl orthosilicate and aluminum isopropoxide are taken as an aluminum source, tetrapropylammonium hydroxide is taken as a template agent, ammonium salt is added as an auxiliary agent to limit the growth of particles along a b axis, after a hydrothermal crystallization reaction, the obtained product is washed, baked and calcined, and the short b-axis ZSM-5 molecular sieve is obtained. The method disclosed by the invention is simple to operate, has repeatability, small template agent dosage and low cost, the synthesized ZSM-5 molecular sieve has the advantages of good thermal stability, high specific surface area, strong acid center, slow carbon deposition speed in reaction and the like, meanwhile, more active sites can be exposed, the transmission path of reactants and products is shortened, the diffusion resistance is reduced, and the method is suitable for industrial production. The catalyst is used for catalytic synthesis of pyridine and derivatives thereof, and has high selectivity and high catalytic activity.

The invention belongs to the technical field of molecular sieve synthesis, and discloses a ZSM-5 type molecular sieve as well as a preparation method and application thereof. The preparation method comprises the following steps: firstly, carrying out calcination treatment and low-temperature plasma treatment on rectorite to obtain modified rectorite; then adding the modified rectorite and a supplementary silicon source into water, sequentially adding butane-1, 4-bis (dodecyl dimethyl ammonium bromide) and hexadecyl trimethyl ammonium bromide, raising the temperature, adding a template agent, adjusting the pH value of the system, and quickly aging by microwave treatment to obtain a precursor; and finally, heating the precursor, carrying out hydrothermal crystallization reaction, washing, drying and grinding a product, and calcining to obtain the ZSM-5 type molecular sieve. The rectorite is used as all aluminum sources and part of silicon sources for molecular sieve synthesis, the aluminum activity and nucleation sites of the rectorite are improved through modification, then two surfactants are introduced, and microwave treatment is combined, so that silicon and aluminum species in a system are rapidly nucleated, and the efficient, economical and higher-performance ZSM-5 type molecular sieve is prepared.

A single-crystal hollow ZSM-5 molecular sieve, and a catalyst containing the molecular sieve and a preparation method therefor and a use thereof. Particles of the single-crystal hollow ZSM-5 molecular sieve have a single-crystal structure with an average crystal grain size of 0.8-3.5 μm, and have an internally and externally nested double-layer cavity structure, wherein an inner cavity is at least partially closed by a first molecular sieve wall layer, an outer cavity is completely closed by a second molecular sieve wall layer, and an epitaxially grown nanorod shell layer is provided on the second molecular sieve wall layer. The single-crystal hollow ZSM-5 molecular sieve can be used for macromolecular catalytic cracking reaction, allowing for a higher low-carbon olefin yield, a higher BTX yield, and a higher ethylene / propylene ratio.

The invention discloses a solvent-free solid-phase synthesis method of a molecular sieve, which comprises the following steps: putting a solid-phase mixed raw material containing a molecular sieve raw material and a grinding material into a closed container, rotating and heating, and synthesizing to obtain the molecular sieve. The method is a novel technology for forming crystals through self-assembly of molecules in a solution under the assistance of mechanical force, the grinding material provides additional mechanical force for molecular sieve raw materials in the synthesis process, and no solvent is used or the use of the solvent is greatly reduced in the synthesis process. And the molecular sieve material with high quality, high crystallization degree and high specific surface area can be prepared in a relatively short time.

The invention discloses a phosphorus-modified dealuminated nano ZSM-5 molecular sieve as well as a preparation method and application thereof. The surface of the ZSM-5 molecular sieve is subjected to dealumination and silicon enrichment treatment, and then the surface is protected through phosphorus modification, so that the stability of the molecular sieve can be effectively improved. The phosphorus-modified dealumination nanometer ZSM-5 molecular sieve catalyst solves the problems that in the prior art, a homogeneous catalyst kettle type isomerization reaction is high in corrosivity, the catalyst is difficult to regenerate, and a waste catalyst seriously pollutes the environment, the molecular sieve is used as the catalyst for a fixed bed isomerization reaction, continuous production is achieved, and the method is suitable for industrial production. Meanwhile, the preparation of the catalyst is simple and convenient, the requirements on reaction equipment are reduced, and the industrial production potential is relatively great.

The present invention relates to a single crystal hollow ZSM-5 molecular sieve. Particles of the single crystal hollow ZSM-5 molecular sieve have a single crystal structure, a hexagonal morphology and a double-layer cavity structure, in which an inner cavity is sheathed in an outer one, wherein the inner-layer cavity is at least partially enclosed by a first molecular sieve wall layer, and the outer-layer cavity is completely enclosed by a second molecular sieve wall layer; and the ratio of the length of a molecular sieve crystal grain to the length of the outer-layer cavity is 1.1-2.0, and the ratio of the width of the molecular sieve crystal grain to the width of the outer-layer cavity is 1.05-1.5. The present invention further relates to a preparation method for and the use of the single crystal hollow ZSM-5 molecular sieve.

The invention provides a preparation method of a metal-doped short b-axis HZSM-5 molecular sieve, which comprises the following steps: 1) adding deionized water into a guiding agent, uniformly stirring at room temperature, and then adding a silicon source to obtain silica sol; 2) adding an aluminum source and an inducer into the silica sol, and uniformly stirring to obtain a molecular sieve precursor; 3) adding a metal source into the molecular sieve precursor, and carrying out pre-crystallization; 4) after the pre-crystallization is completed, transferring the mixture into a hydrothermal kettle for hydrothermal crystallization; 5, after hydrothermal crystallization is completed, centrifuging, washing, drying and roasting are conducted, and the metal-doped short b-axis HZSM-5 molecular sieves are obtained.According to the HZSM-5 molecular sieves prepared through the method, active metal and short b-axis hole channel structures are introduced at the same time through in-situ synthesis, the catalytic activity and diffusion performance of the molecular sieves can be improved at the same time, and the application prospects are very good.

The invention discloses a method for in-situ synthesis of a hydrogen type hierarchical pore ZSM-5 molecular sieve from binary ash, which comprises the following steps: firstly, mixing aluminum ash, water and fly ash according to a certain proportion, and desalting to obtain binary ash; mixing the binary ash, a pore-enlarging agent and inorganic acid to prepare silicon-aluminum sol; then, mixing the silica-alumina sol with a structure-directing agent, aging, crystallizing, washing, drying and roasting to obtain sodium type hierarchical pore ZSM-5; and finally, mixing the sodium-type hierarchical pore ZSM-5 molecular sieve with ammonium salt, washing and drying to obtain the hydrogen-type hierarchical pore ZSM-5 molecular sieve. The performance of the prepared hydrogen-type hierarchical pore ZSM-5 molecular sieve is equivalent to that of a molecular sieve prepared from a traditional aluminum-silicon source, the external specific surface area reaches up to 650 m < 2 > / g, the mesoporous volume reaches 0.65 m < 3 > / g or above, resource utilization of solid waste and hazardous waste is achieved, environmental pollution is reduced, and the synthesis cost of the hydrogen-type hierarchical pore ZSM-5 molecular sieve is reduced.

The present invention discloses a kind of mesoporous ZSM 5 molecular sieve and preparation method thereof, the preparation method comprises the following steps:Silicon source, aluminum source, alkali source, crystallization inducer, auxiliary agent, water are mixed to obtain crystallized gel, the crystallized gel is crystallized under hydrothermal conditions, washed, filtered, dried, roasted, and mesoporous ZSM 5 molecular sieve is obtained;Wherein, the silicon source is magadiite, the crystallization inducer is organic ammonium salt and seed crystal, and the auxiliary agent is selected from at least one of alcohol or amine. The molecular sieve obtained by the method of the present invention has the characteristics of high crystallinity, large specific surface area, and large micro-mesopore volume. The preparation method of the present invention adopts cheap silicon source, and in the case of adding a small amount of mesoporous template agent, mesoporous ZSM 5 molecular sieve can be synthesized, which is applied to light hydrocarbon catalytic cracking reaction with good low-carbon olefin selectivity.

The invention provides a hierarchical pore zeolite molecular sieve as well as a preparation method and application thereof. The preparation method comprises the following steps: 1) pretreating a hydrogen-type zeolite molecular sieve at 500-600 DEG C to obtain a pretreated hydrogen-type zeolite molecular sieve; 2) in an inert gas environment, cooling the pretreated hydrogen type zeolite molecular sieve to 300-500 DEG C, introducing an inert gas containing a carbon source into the system, and carrying out carbon pre-deposition treatment to obtain a carbon pre-deposited zeolite molecular sieve; and (3) sequentially carrying out alkali treatment, roasting treatment, acid pickling treatment and drying treatment on the pre-carbon-deposited zeolite molecular sieve to obtain the hierarchical pore zeolite molecular sieve. Through carbon pre-deposition treatment, carbon deposition layers are formed on the surface and in the zeolite, disordered etching of alkali is resisted, and the hierarchical pore zeolite molecular sieve with rich mesopores and micropore structures is obtained. The prepared hierarchical pore zeolite has good molecular diffusivity as a methanol-to-olefin catalyst, and the conversion rate of methanol and the service life of the catalyst are both improved.

The present application relates to the technical field of ZSM-5 molecular sieve preparation, and provides a high-crystallinity aluminum-rich ZSM-5 molecular sieve, a preparation method and application thereof.The preparation method of the high-crystallinity aluminum-rich ZSM-5 molecular sieve provided by the present application realizes the skeleton composition control of the ZSM-5 molecular sieve by adding a second aluminum source and then performing secondary crystallization, solves the technical bottleneck that it is difficult to directly synthesize the high-crystallinity aluminum-rich ZSM-5, breaks through the lower limit of the Si / Al ratio phase region of the artificial in-situ synthesis of the molecular sieve, effectively controls the crystal parameter and improves the production efficiency, realizes the precise construction of the high-crystallinity aluminum-rich ZSM-5 molecular sieve, and thus enhances the micropore crystallinity of the molecular sieve, optimizes the acid distribution, greatly enriches the metastable surface active acid center distribution of the molecular sieve, and has good aromatic hydrocarbon conversion performance.

The invention relates to silicon powder as well as a preparation method and application thereof. In an ultraviolet Raman spectrum of the silicon powder, no characteristic peak exists near 240 cm <-1 >; or, in the ultraviolet Raman spectrum of the silicon powder, in a characteristic region with the vibration frequency not larger than 600 cm <-1 >, at least one characteristic peak not larger than 240 cm <-1 > exists, and the sum of the peak areas of the characteristic peaks not larger than 240 cm <-1 > accounts for more than or equal to 20% of the total area of the characteristic peaks in the characteristic region with the vibration frequency not larger than 600 cm <-1 >. The silicon powder disclosed by the invention can be applied to synthesis of a silicon-containing crystalline state material, and has the characteristics of good uniformity, easiness in activation and crystallization, low dependence on an organic template agent, shortening of a crystallization induction period and the like.

The invention discloses a bifunctional composite catalyst for preparing aviation kerosene through direct hydrogenation of carbon dioxide. The bifunctional composite catalyst is prepared from the H-ZSM-5 zeolite molecular sieve and a composite metal oxide InZnZrOx. Wherein the H-ZSM-5 zeolite molecular sieve is obtained by an inventor through a hydrothermal method, the appearance, the acid strength and the acid amount of the molecular sieve can be accurately controlled through the method, a hierarchical pore structure in a pore channel can be increased, and the selectivity of aviation kerosene components can be well improved; the problems that the diffusion of the heavy carbon aromatic hydrocarbon product in the pore channel of the zeolite molecular sieve is blocked, so that the catalyst is easy to deposit carbon, and the acidic site is covered are solved to a great extent; the composite metal oxide InZnZrOx can be prepared through flexible and efficient coprecipitation, and the problems that in an InZnZrOx / flaky hierarchical pore H-ZSM-5 molecular sieve difunctional composite catalyst, the metal oxide dispersity is low, and the catalytic activity is low are solved.

This disclosure relates to methods of preparing a zeolite including heating the dry gel zeolite in a fixed bed reactor to form a zeolite.

The present invention relates to methods for synthesizing MFI zeolite nanosheet (ZN) assemblies and open-pore ZN plates and for tiling ZN plates on polymer supports. Methods for producing ZN assemblies and ZN plates may reduce or eliminate the need to synthesize nanoparticle (NP) seed-evolved single-crystal zeolite nanosheets (ZNs) as an intermediate product. Methods for tiling ZN plates on polymer supports may produce ZN plate-tiled (ZNPT) membranes with reduced permeation through intercrystalline spaces.

The invention relates to the technical field of molecular sieve preparation, and provides a ZSM-5 molecular sieve as well as a preparation method and application thereof. The preparation method of the ZSM-5 molecular sieve comprises the following steps: obtaining a mixed solution containing an aluminum source, an additive, a silicon source, an alkali source, an organic template agent, a ZSM-5 seed crystal and a solvent; performing crystallization treatment and roasting treatment on the mixed solution in sequence to prepare a ZSM-5 molecular sieve; the additive comprises amino acid and / or alcohol; the alkali source comprises a first alkali source containing Na and a second alkali source containing M, and M is selected from at least one of Li, K and Cs. According to the preparation method of the ZSM-5 molecular sieve provided by the invention, the amino acid and / or alcohol component is added as an additive, and more than two different alkali sources are matched for use, so that the ZSM-5 molecular sieve which is low in silica-alumina ratio, high in crystallinity and low in non-framework aluminum content and has nanoscale crystal grains can be prepared.

The invention discloses a method for synthesizing a high-crystallinity zeolite molecular sieve through in-situ crystallization of aluminosilicate minerals, and belongs to the technical field of zeolite molecular sieve synthesis. The preparation method comprises the following steps: preparing a crystal nucleus liquid containing zeolite molecular sieve microcrystals and a solid-phase wafer; mixing aluminosilicate minerals with the crystal nucleus liquid, and respectively roasting at 850-1000 DEG C and 650-800 DEG C to prepare an active mineral silicon source and an active mineral aluminum source; and mixing the active mineral source with additional silicon species, NaOH, a template agent, a crystal nucleus liquid, a solid-phase wafer and water, crystallizing at 90-150 DEG C, and post-processing to obtain the high-crystallinity zeolite molecular sieve. By introducing the crystal nucleus liquid and the solid-phase wafer, silicon and aluminum components in the aluminosilicate mineral are promoted to be converted into the target molecular sieve in situ, the crystallinity of the product is remarkably improved, the synthesis cost is reduced, and the method is suitable for the fields of petrochemical engineering, environmental protection and the like.

The invention belongs to the technical field of molecular sieve research, and particularly discloses a self-assembled microsphere molecular sieve with a hierarchical pore structure and a preparation method thereof, the molecular sieve comprises at least one microsphere, each microsphere comprises a plurality of mutually stacked primary particles, the primary particles are composed of mutually crossed and stacked nano sheet layers, and the nano sheet layers are stacked in a staggered manner. The microspheres have a porous structure, and the porous structure comprises micropores, mesopores and macropores; the pore diameter of the micropores is 0.5 nm to 2 nm, the pore diameter of the mesopores is 2 nm to 30 nm, and the pore diameter of the macropores is 50 nm to 300 nm; the average particle size of the molecular sieve is 5-20 [mu] m. Therefore, the molecular sieve is simple in synthesis process, products are easy to collect, ultra-high-speed centrifugal separation is not needed, process conditions are greatly simplified, industrial large-scale production is facilitated, and the molecular sieve has good catalytic performance.

Provided in the present application are an acoustic reinforcing material block and an application thereof, a micro loudspeaker and an electronic device. The raw materials of the acoustic reinforcing material block include a porous material, an adhesive, and an adjuvant loaded in a structural framework. The micro loudspeaker comprises an upper housing and a lower housing which form an inner cavity, and a loudspeaker unit located in the inner cavity, wherein the inner cavity is divided into a front cavity and a rear cavity, and the front cavity is in communication with a sound outlet hole; and a front cavity resonant cavity which is in communication with the front cavity and filled with an acoustic enhancing material is provided in the upper housing.

The invention discloses a ZSM molecular sieve, a method for synthesizing the ZSM molecular sieve by using a decommissioned fan blade and application, and belongs to the technical field of solid waste recycling and high-valued.The decommissioned fan blade is subjected to pyrolysis and then subjected to primary calcination, and glass fibers are obtained; the preparation method comprises the following steps: grinding, crushing, mixing with alkali, carrying out secondary calcination, grinding, uniformly mixing with water, and carrying out solid-liquid separation to obtain a precursor solution containing silicon and aluminum elements; mixing with a template agent aqueous solution, and aging to obtain initial gel; and carrying out hydrothermal reaction, solid-liquid separation, drying, three times of calcination and grinding to obtain the ZSM type mesoporous molecular sieve. The glass fibers in the retired fan blades are used as silicon and aluminum sources, so that the dependence on high-cost raw materials in the traditional ZSM molecular sieve production process is reduced, and the production cost is remarkably reduced. The high-value utilization of the glass fiber in the retired fan blade is effectively realized, the glass fiber is converted into the ZSM molecular sieve with economic and industrial values, and the utilization rate of waste resources is increased.

A Silicalite-1 (at) ZSM-5 core-shell molecular sieve takes a Silicalite-1 molecular sieve as a core layer and a ZSM-5 molecular sieve as a shell layer, the particle size is 90-140nm, and a preparation method of the Silicalite-1 (at) ZSM-5 core-shell molecular sieve comprises the following steps: (1) mixing a template agent, a first silicon source and water to obtain a core-layer molecular sieve synthesis system, and performing aging I and crystallization I to obtain an intermediate product; and (2) mixing the intermediate product obtained in the step (1), an aluminum source, a second silicon source, an alkali source, a zwitterion balancing agent and water to obtain a shell molecular sieve synthesis system, carrying out aging II and crystallization II, washing and drying the obtained solid, and roasting to obtain the Sillicalite-1-coated ZSM-5 core-shell molecular sieve. The molecular sieve is high in carbon capacity, simple in preparation method and low in cost, and can be used for a low-carbon alkane catalytic cracking reaction, a heavy aromatic hydrocarbon lightening reaction and a light hydrocarbon aromatization reaction.

The present disclosure is directed to a method of manufacture of zeolite by a non-classical route. A sol-gel process includes an initial homogeneous aqueous mixture comprising precursors and reagents for forming the zeolite, and water-soluble oxidized disulfide oil (ODSO) as an additional component. The resulting zeolite possesses a hierarchical nature that is improved relative to a comparative zeolite formed in the absence of ODSO, via a classical route, and of approximately equivalent compositional ratio, time and conditions effective for the zeolite.

This disclosure relates to methods of forming a zeolite composition, the method comprising calcining one or more clay mineral compositions to form metakaolin, wherein the one or more clay mineral compositions may comprise greater than or equal to 10 wt. % halloysite, forming a slurry by combining at least the metakaolin, a shape selective zeolite, a basic compound, silica particles, and a templating agent, hydrothermally treating the slurry to form a hydrothermal product, calcining the hydrothermal product to form a zeolite product, combining the zeolite product and at least one metal precursor, wherein the at least one metal precursor may comprise a manganese precursor, a phosphorous precursor, or both a manganese precursor and a phosphorous precursor to form a zeolite composition comprising manganese, phosphorus, or both manganese and phosphorous.

The invention discloses a regular ZSM-5 molecular sieve as well as a synthesis method and application thereof, and belongs to the technical field of catalysts and synthesis thereof. The method comprises the following steps: mixing a ZSM-5 molecular sieve with alkali liquor, reacting at 25-200 DEG C for 2-6 hours, and centrifuging to obtain ZSM-5 secondary structure alkali liquor; adding the aluminum source acid solution into the silicon source alkali solution to obtain gel, and pulping to obtain slurry; adding ZSM-5 secondary structure alkali liquor into the slurry, mixing, transferring into a hydrothermal reaction kettle, carrying out dynamic or static crystallization, and washing, drying and roasting after crystallization to obtain the regular ZSM-5 molecular sieve. According to the present invention, the conditions are mild during the ZSM-5 secondary structure preparation, the used alkali solution can be further applied to the ZSM-5 molecular sieve synthesis gel system, the alkali solution can be maximally utilized, the ZSM-5 secondary structure is complete, the ZSM-5 crystallization nucleation guiding ability is strong, and the secondary structure can increase the openness of the pore structure and broaden the use range.