39results about "Molecular-sieve silicates" patented technology

The invention provides an oriented ultrathin FER zeolite molecular sieve membrane as well as a preparation method and application thereof. The preparation method comprises the following steps: firstly, synthesizing a monodisperse FER zeolite nanosheet with a high length-depth ratio through a hydrothermal method; preparing a seed crystal liquid, and coating the surface of a porous carrier with the seed crystal liquid to form an oriented seed crystal layer; and carrying out hydrothermal epitaxial growth in a secondary growth solution. Through innovative design of seed crystal synthesis and epitaxial growth, the FER zeolite membrane prepared by the method has a structure with high alpha-axis preferred orientation, submicron controllable thickness, compactness and no defect. The membrane can be used for accurately screening gas molecules with small size difference by utilizing six-membered ring pore channels uniformly arranged along an a axis. When helium and methane or carbon dioxide are separated, the membrane shows permeation flux and separation selectivity far superior to those in the prior art, provides a brand new technical approach for efficient and low-energy-consumption recovery of helium and other high-value gases in the industry, and has great industrial application value.

The invention relates to a titanium silicalite molecular sieve and a preparation method thereof, and the method comprises the following steps: S1, mixing titanium silicalite molecular sieve raw powder, a first binder, water and an optional first surfactant, carrying out first molding, and carrying out first roasting treatment on a solid product obtained by the first molding to obtain titanium silicalite molecular sieve microspheres; s2, mixing the titanium silicalite molecular sieve microspheres, a second binder, water and an optional second surfactant, and carrying out secondary molding to obtain a titanium silicalite molecular sieve precursor; s3, performing alkaline steam aging treatment on the titanium silicalite molecular sieve precursor to obtain a titanium silicalite molecular sieve pre-product; and S4, carrying out secondary roasting treatment on the titanium silicalite molecular sieve pre-product. The method disclosed by the invention is simple and green in steps, and the prepared titanium silicalite molecular sieve has relatively high mechanical strength.

The application discloses a synthesis method of nanoscale sheet TS-1 titanium silicate molecular sieve. Tetraethyl orthosilicate is used as a silicon source, tetrabutyl titanate is used as a titanium source, tetrapropyl ammonium hydroxide is used as a template agent, and an ammonium salt is added as an assistant for limiting particle growth along a b axis. After hydrothermal reaction, the obtained product is washed, baked and calcined, so that the nanoscale sheet TS-1 titanium silicate molecular sieve with a b axis size of 20-50 nm and a axis and c axis size of 80-150 nm is synthesized. The method has the advantages of simple operation, repeatability, small template agent consumption, low cost, easy industrial production and application, etc. The sheet nanoscale TS-1 titanium silicate molecular sieve synthesized by the method has small particle size, thin b axis thickness, large specific surface area, more exposed Ti active sites, shortened transmission path of reactants and products, reduced diffusion resistance, and higher catalytic activity for oxidation reactions of toluene and cyclohexene.

The invention relates to a titanium silicalite molecular sieve and a preparation method and application thereof, the method comprises the following steps: S1, mixing titanium silicalite molecular sieve raw powder, a first binder, water and an optional first surfactant, carrying out first molding, and carrying out first roasting treatment on a solid product obtained by the first molding to obtain titanium silicalite molecular sieve microspheres; s2, mixing the titanium silicalite molecular sieve microspheres, a second binder, water and an optional second surfactant, and carrying out secondary molding to obtain a titanium silicalite molecular sieve precursor; s3, performing steam aging on the titanium silicalite molecular sieve precursor to obtain a titanium silicalite molecular sieve pre-product; s4, carrying out secondary roasting treatment on the titanium silicalite molecular sieve pre-product; the mode of the first-time forming is extrusion forming. The titanium silicalite molecular sieve prepared by the method disclosed by the invention has higher mechanical strength and larger specific surface area, and when the titanium silicalite molecular sieve is used for a reaction for preparing epoxypropane, higher epoxypropane selectivity and yield can be obtained.

The present invention relates to a zeolitic material of MFI framework type having a framework structure comprising Si, O, and Ti, obtained or obtainable from a Ti containing compound, wherein the Ti containing compound has an APHA color number of ≤ 300, the APHA color number being determined according to DIN EN ISO 6271:2016-05; wherein the Ti containing compound comprises a Ti containing alcoholate selected from the group of Ti(O-alkyl)4, wherein each alkyl group is independently selected from branched or unbranched C1 to C6 alkyl. The present invention also relates to a process for preparation of said zeolitic material, a molding comprising said zeolitic material, the use of said molding and a process for oxidizing an organic compound comprising bringing an organic compound in contact with a catalyst comprising a molding..

The invention relates to the field of molecular sieve preparation, in particular to a hierarchical pore TS-1 molecular sieve as well as a preparation method and application thereof. According to the preparation method provided by the invention, in the TS-1 molecular sieve synthesis process, a certain amount of silanization reagent is added into a gel system, in the crystallization process, the silanization reagent, a titanium source and a silicon source participate in condensation polymerization together, and a hydrophobic chain segment can form a dynamic micelle structure in the synthesis system; and directionally regulating and controlling pore formation on the outer surface and the peripheral area of the crystal. After post-treatment roasting, organic components in the silanization reagent are removed, so that a hierarchical pore structure is formed in a molecular sieve framework, and the specific surface area of the catalyst and the reactant diffusion efficiency are effectively improved. The catalyst is used for catalyzing olefin epoxidation, the conversion rate of substrate olefin reaches 36.5%, and the selectivity of diol reaches 98%.

The invention relates to a method for preparing pore-expanded mesoporous silica nanoparticles, comprising: - a first step involving preparing mesoporous silica nanoparticles using surfactants as templating agents; - and a second step of degradation of the silica nanoparticles using an amino tri-alcohol of general formula NR1OH R2OHR3OH, wherein R1, R2 and R3 represent identical or different organic groups, preferably hydrocarbon groups and particularly aliphatic chains with a chain length of less than four, and more preferably 2,2',2''-nitrilotriethanol or triethanolamine, the second step being carried out in water.

A titanium silicalite molecular sieve with a hierarchical porous structure is provided. The spectral peaks of the 1H MAS NMR spectrum of the titanium silicalite molecular sieve in the chemical shift range of 1-6 ppm are separated to obtain five spectral peaks whose chemical shifts corresponding to the peak positions are 1.8±0.1 ppm, 2.2 ppm±0.1 ppm, 2.8 ppm±0.1 ppm, 3.8±0.1 ppm and 4.6±0.1 ppm, respectively. The peak areas of the peaks satisfy specific proportional relationships. The molecular sieve has significantly enhanced anti-deactivation performance and can significantly improve the cyclohexanone oxime conversion rate and the caprolactam selectivity when used in the cyclohexanone oxime gas-phase Beckmann rearrangement reaction.

An alkali metal ion modified titanium silicalite zeolite for gas phase epoxidation of propylene and hydrogen peroxide and a preparation method thereof. The method includes, at first step: preparing an alkali metal hydroxide modification solution; at second step: conducting controlled hydrothermal treatment on a TS-1 zeolite matrix by using an alkali metal hydroxide solution; and at third step: conducting post-treatment on the hydrothermally modified TS-1 zeolite, including solid-liquid separation, washing, drying and calcining. In the washing process, the modified TS-1 zeolite wet material is washed with a low concentration alkali metal hydroxide solution; alkali metal ions are reserved on the silicon hydroxyl of the modified titanium silicalite zeolite; and an infrared characteristic absorption band of a framework titanium active center modified by the alkali metal ions is in a range above 960 cm−1 and below 980 cm−1.

The invention discloses a synthesis method of a hierarchical pore molecular sieve nanosheet, and belongs to the technical field of molecular sieve synthesis. Comprising the following steps: mixing a tetrapropylammonium hydroxide solution, tetraethyl orthosilicate and water, stirring for pre-hydrolysis, standing for aging, then adding a nanocellulose aqueous dispersion, carrying out ultrasonic treatment, then adding urea, water and a metal source, stirring, and finally crystallizing at 150-200 DEG C for 12-30 hours, after crystallization is finished, carrying out solid-liquid separation on a product, and washing, drying and roasting a solid product to obtain the hierarchical pore molecular sieve nanosheet. According to the invention, nano-crystalline cellulose and urea are compounded and introduced into a molecular sieve synthesis system for the first time, and controllable growth of flaky morphology and integrated construction of intracrystalline mesopores are realized in situ under a fluoride-free condition. The method is green and environment-friendly, raw materials are cheap, the process is simple, and the method has extremely high industrial application value.

The invention relates to a titanium silicalite molecular sieve and a preparation method thereof, and the method comprises the following steps: S1, mixing unroasted titanium silicalite molecular sieve raw powder, a first binder, water and an optional first surfactant, carrying out first molding, and carrying out first roasting treatment on a solid product obtained by the first molding, the titanium silicalite molecular sieve microspheres are obtained; s2, mixing the titanium silicalite molecular sieve microspheres, a second binder, water and an optional second surfactant, and carrying out secondary molding to obtain a titanium silicalite molecular sieve precursor; s3, performing steam aging on the titanium silicalite molecular sieve precursor to obtain a titanium silicalite molecular sieve pre-product; and S4, carrying out secondary roasting treatment on the titanium silicalite molecular sieve pre-product. The titanium silicalite molecular sieve prepared by the method disclosed by the invention has relatively high mechanical strength and porosity.

The invention relates to a titanium silicalite molecular sieve and a preparation method thereof, and the method comprises the following steps: S1, mixing titanium silicalite molecular sieve raw powder, a first binder, water and an optional first surfactant, carrying out first molding, and carrying out first roasting treatment on a solid product obtained by the first molding to obtain titanium silicalite molecular sieve microspheres; s2, mixing the titanium silicalite molecular sieve microspheres, a second binder, water and an optional second surfactant, and carrying out secondary molding to obtain a titanium silicalite molecular sieve precursor; s3, performing steam aging treatment on the titanium silicalite molecular sieve precursor to obtain a titanium silicalite molecular sieve pre-product; s4, carrying out secondary roasting treatment on the titanium silicalite molecular sieve pre-product; a pore-foaming agent is added in the first forming and / or the second forming. The titanium silicalite molecular sieve prepared by the method disclosed by the invention has relatively high mechanical strength, forms a hierarchical porous structure in the titanium silicalite molecular sieve, and has relatively high porosity and specific surface area.

The invention relates to a titanium silicalite molecular sieve, a preparation method thereof and a propylene epoxidation reaction method, and the method comprises the following steps: S1, mixing titanium silicalite molecular sieve raw powder with a first solution containing a first binder, alkali and an optional first auxiliary agent, and carrying out first molding to obtain titanium silicalite molecular sieve microspheres; s2, mixing the titanium silicalite molecular sieve microspheres, a second binder, water and an optional second auxiliary agent, and carrying out secondary molding to obtain a titanium silicalite molecular sieve precursor; s3, performing steam aging on the titanium silicalite molecular sieve precursor to obtain a titanium silicalite molecular sieve pre-product; s4, carrying out roasting treatment on the titanium silicalite molecular sieve pre-product; the pH value of the first solution is 8-13. The titanium silicalite molecular sieve prepared by the method disclosed by the invention has a porous structure, has the characteristic of high mechanical strength, has good epoxidation catalytic activity, is used for propylene epoxidation reaction, and has relatively good catalytic performance and stability.

The present invention relates to a one-dimensional silicate material ZEO-2 with a novel structure and a three-dimensional silicate molecular sieve ZEO-3 obtained by roasting ZEO-2 and a synthesis method therefor and a use thereof. The X-ray powder diffraction characteristics and crystal structures of the two silicate materials are represented. The one-dimensional silicate ZEO-2 can be synthesized by a simple method. The molecular sieve ZEO-3 can be obtained by calcining the one-dimensional silicate ZEO-2 to cause topological condensation. ZEO-2 can be used as a silicon source or a precursor in the synthesis of a novel molecular sieve. The molecular sieve ZEO-3 has good thermal stability and can be used as an adsorbent or a catalyst.

The invention relates to a titanium silicalite molecular sieve, a preparation method thereof and a method for preparing epoxypropane, and the method comprises the following steps: S1, mixing titanium silicalite molecular sieve raw powder, a first binder, water and an optional first surfactant, and performing to obtain titanium silicalite molecular sieve microspheres; s2, mixing the titanium silicalite molecular sieve microspheres with a second solution containing a second binder, alkali and an optional second surfactant, and carrying out molding treatment to obtain a titanium silicalite molecular sieve precursor; s3, performing steam aging on the titanium silicalite molecular sieve precursor to obtain a titanium silicalite molecular sieve pre-product; s4, carrying out roasting treatment on the titanium silicalite molecular sieve pre-product; the pH value of the second solution is 8-13. The titanium silicalite molecular sieve prepared by the method disclosed by the invention has a porous structure, so that the material is endowed with excellent mechanical strength, and the catalytic activity of the titanium silicalite molecular sieve in the production of epoxypropane is also remarkably improved.

The invention relates to a titanium silicalite molecular sieve, a preparation method thereof and a method for preparing epoxypropane, and the method comprises the following steps: S1, mixing titanium silicalite molecular sieve raw powder, a first main binder, water, an optional first binder and an optional first surfactant, and carrying out first molding to obtain titanium silicalite molecular sieve microspheres; s2, mixing the titanium silicalite molecular sieve microspheres, a second binder, water and an optional second surfactant, and carrying out secondary molding to obtain a titanium silicalite molecular sieve precursor; s3, performing steam aging on the titanium silicalite molecular sieve precursor to obtain a titanium silicalite molecular sieve pre-product; and S4, carrying out roasting treatment on the titanium silicalite molecular sieve pre-product. The titanium silicalite molecular sieve prepared by the method disclosed by the invention has a porous structure and high mechanical strength, is used for propylene epoxidation reaction, and can obtain relatively high raw material conversion rate and target product selectivity.

The application provides a kind of hierarchical pore SBA-15 molecular sieve and its preparation method, the preparation method includes the following steps: P123, pore expander and inorganic acid are dissolved in water to obtain a mixed solution, silicon source is added and hydrolyzed in the mixed solution to obtain a hydrolysate and mother liquor;Repeat the following operation: the mother liquor obtained in the last step is subjected to ethanol removal treatment, then P123, pore expander and inorganic acid are added and dissolved, silicon source is added and hydrolyzed again, and the solid and mother liquor are obtained again;S3: the hydrolysate obtained in S1 and S2 is combined, and the combined solid product is subjected to hydrothermal crystallization by adding the mother liquor, the crystallization product is dried and calcined to obtain the hierarchical pore SBA-15 molecular sieve.The preparation method of the application has high synthesis efficiency, low cost and less pollution, and the synthesized molecular sieve contains hierarchical pore structure and can realize cross-scale penetration.

This disclosure relates to a titanium-silicon molecular sieve with a hierarchical porous structure, a method for preparing the same, and a method for preparing caprolactam. The titanium-silicon molecular sieve has the following characteristics: 1 ¹H MAS NMR characteristics: The peak area at the chemical shift position of 1.8±0.1ppm is denoted as A1, the peak area at the chemical shift position of 2.2ppm±0.1ppm is denoted as A2, the peak area at the chemical shift position of 2.8ppm±0.1ppm is denoted as A3, the peak area at the chemical shift position of 3.8±0.1ppm is denoted as A4, and the peak area at the chemical shift position of 4.6±0.1ppm is denoted as A5; X1 is defined as any value between 0.5 and 2.2 as in Equation (1): X1=(A2+A3) / A1 (Equation (1)); X2 is defined as any value between 0.1 and 1.2 as in Equation (2): X2=A4 / A1 (Equation (2)); X3 is defined as any value between 0.05 and 0.65 as in Equation (3): X3=A5 / A1 (Equation (3)).

The invention relates to a method for producing a composite material with a support structure and a coating on the surface of the support structure. The coating comprises crystals of a zeolite material or a material similar to zeolite as active components, and inter-crystalline meso- and / or macro-pores are formed in the coating. The invention is characterized in that the method has the following steps: a) providing a suspension which contains nano-scale starting crystals made of a zeolite material or a material similar to zeolite and precursor compounds of the zeolite material or the material similar to zeolite, b) applying the suspension provided in step a) onto the surface of the support structure, c) solidifying the suspension applied in step b) by at least partly removing the solvent which forms the liquid phase of the suspension in order to obtain a coating which contains the starting crystals and the precursor compounds, and d) keeping the coating obtained in step c) on the surface of the support structure in a steam-containing atmosphere at an increased temperature such that the obtained precursor compounds are converted into a zeolite material or a material similar to zeolite and together with the starting crystals forms the coating which comprises the crystals of a zeolite material or a material similar to zeolite.

The application provides a silicon-aluminum material and a preparation method thereof. After being calcined at 500-700 DEG C, the silicon-aluminum material has the following properties: the content of silicon dioxide is 20-40 wt%, the pore volume is no less than 0.70 mL / g, and the specific surface area is 280-400 m 2 / g. The preparation method of the silicon-aluminum material comprises the following steps: (1) mixing a first silicon source, a first additive and water to obtain a sol; (2) mixing the sol with alcohol and performing heat treatment to obtain a first material flow; (3) reacting a second silicon source, an acidic aluminum-containing compound and an alkaline aluminum-containing compound to obtain a mixed solution; (4) mixing the mixed solution with a second additive to obtain a slurry; (5) mixing the slurry with the first material flow and performing hydrothermal treatment, and then performing washing, drying and calcination to obtain the silicon-aluminum material. The silicon-aluminum material has the characteristics of molecular sieve, hierarchical pore distribution and high B acid content, and is suitable for being used as a carrier of a catalytic material.

A method of making a molecular sieve may include: reacting a source selected from the group consisting of: a source of a tetrahedral element in the presence of a structure directing agent (SDA) selected from the group consisting of: Ar+-L-Ar, Ar+-L-Ar-L-Ar+, Ar+-L-Ar-L-NR3+, and ArAr+-L-Ar+Ar, where Ar+ is to a N-containing cationic aromatic ring, Ar is to a non-charged aromatic ring, L is a methylene chain of 3-6 carbon atoms, NR3+ is to a quaternary ammonium, and ArAr+ and Ar+Ar are a fused aromatic ring structure comprising both a N-containing cationic portion and a non-charged portion, to produce the molecular sieve.

The invention relates to a titanium silicalite molecular sieve and a preparation method thereof, and the method comprises the following steps: S1, mixing titanium silicalite molecular sieve raw powder with a pore filling agent, and drying to obtain pore-filled titanium silicalite molecular sieve raw powder; s2, mixing the titanium silicalite molecular sieve raw powder filled with the pore channels, a first binder, water and an optional first surfactant, carrying out first molding, and carrying out first roasting treatment on a solid product obtained by the first molding to obtain titanium silicalite molecular sieve microspheres; s3, mixing the titanium silicalite molecular sieve microspheres, a second binder, water and an optional second surfactant, and carrying out secondary molding to obtain a titanium silicalite molecular sieve precursor; s4, performing steam aging on the titanium silicalite molecular sieve precursor to obtain a titanium silicalite molecular sieve pre-product; and S5, carrying out secondary roasting treatment on the titanium silicalite molecular sieve pre-product. The titanium silicalite molecular sieve prepared by the method disclosed by the invention has relatively high mechanical strength, good pore connectivity, high porosity and large specific surface area.

The invention relates to a titanium silicalite molecular sieve, a preparation method thereof and a method for preparing epoxypropane, and the method comprises the following steps: S1, mixing titanium silicalite molecular sieve raw powder, water, an optional first binder and an optional first surfactant, and carrying out first molding to obtain titanium silicalite molecular sieve microspheres; s2, mixing the titanium silicalite molecular sieve microspheres, water, a selectable secondary binder and a selectable second surfactant, and carrying out secondary molding to obtain a titanium silicalite molecular sieve precursor; s3, carrying out aging treatment on the titanium silicalite molecular sieve precursor to obtain a titanium silicalite molecular sieve pre-product; s4, carrying out roasting treatment on the titanium silicalite molecular sieve pre-product; a first main binder and a first alkali are added in the first molding; and / or a second main binder and a second alkali are added in the second molding. The titanium silicalite molecular sieve prepared by the method disclosed by the invention is high in mechanical strength, is used for propylene epoxidation reaction, and can obtain relatively high raw material conversion rate and target product selectivity.

The present application relates to the technical field of molecular sieve, and discloses a molecular sieve synthesized based on fly ash and rare earth tailings and a preparation method thereof, wherein the molecular sieve takes the rare earth tailings and the fly ash as the basis, mixes the rare earth tailings and the fly ash with alkali in a certain proportion, and then places them in a muffle furnace for activation; the activated product is dissolved in deionized water and filtered; the silicon-aluminum activation rate in the raw material is obtained by determining the change of the mass of the raw material and the percentage content of SiO2 and Al2O3 before and after the filtration; the silicon-aluminum ratio, the reaction temperature and the reaction time of the synthesis system are regulated, and the molecular sieve is synthesized by using the low-temperature and high-pressure conditions formed by the hydrothermal method; the raw material of the molecular sieve is the rare earth tailings and the fly ash left after the operations of rare earth selection, fluorite selection and iron selection, and the minerals contain the silicon-aluminum source capable of synthesizing the molecular sieve; the molecular sieve has a large specific surface area and a uniform pore size; in addition, the molecular sieve can be used as a denitration catalyst and a carbon storage adsorbent, and realizes the industrialized production of the fly ash and rare earth tailings based molecular sieve.

The application relates to a method for regulating the distribution of skeleton silicon and aluminum of a molecular sieve and a product thereof, and to preparation of a silicon-aluminum gel and a pure silicon gel, aging of the two gels respectively, mixing the two gels after aging, and then rapid crystallization. The nano particles of the aged silicon-aluminum gel and the nano particles of the pure silicon gel participate in the molecular sieve crystal growth process without difference, the pure silicon microcrystal region and the silicon-aluminum containing microcrystal region are alternately embedded into the molecular sieve crystal in a 'interlaced growth' mode, and a molecular sieve with adjustable skeleton silicon and aluminum distribution is obtained. The molecular sieve prepared by the method changes the common surface aluminum-rich characteristics of conventional zeolite molecular sieves, is suitable for synthesis of various molecular sieves, and includes titanium-silicon molecular sieves, iron-silicon molecular sieves and phosphorus-aluminum molecular sieves. The method has simple process, low consumption, does not need any modification on the existing equipment, and has good industrial application prospect.

The invention relates to a titanium silicalite molecular sieve, a preparation method thereof and a propylene epoxidation reaction method, and the method comprises the following steps: S1, mixing titanium silicalite molecular sieve raw powder, a first binder, water and an optional first auxiliary agent, and performing to obtain titanium silicalite molecular sieve microspheres; s2, mixing the titanium silicalite molecular sieve microspheres, a second main binder, water, a selectable second binder and a selectable second auxiliary agent, and carrying out molding treatment to obtain a titanium silicalite molecular sieve precursor; s3, performing steam aging on the titanium silicalite molecular sieve precursor to obtain a titanium silicalite molecular sieve pre-product; s4, carrying out roasting treatment on the titanium silicalite molecular sieve pre-product; and the second main binder comprises white carbon black. The titanium silicalite molecular sieve prepared by the method disclosed by the invention has a porous structure, high mechanical strength and good epoxidation catalytic activity, is used for propylene epoxidation reaction, and can obtain relatively high raw material conversion rate and target product selectivity.

The present invention relates to a zeolitic material having a framework structure comprising Si, O, and Ti, obtained or obtainable from a Ti containing compound, wherein the Ti containing compound has an APHA color number of ≤ 300. In a second aspect, the invention relates to the Ti containing compound having an APHA color number of ≤ 300. A third aspect of the present invention is related to the use of the Ti containing compound having an APHA color number of ≤ 300 of the second aspect for the preparation of a zeolitic material having framework structure comprising Si, O, and Ti, as well as to a process for preparation of a zeolitic material as in the first aspect having a framework structure comprising Si, O, and Ti, wherein the zeolitic material having a framework structure comprising Si, O, and Ti, is prepared from a Ti containing compound having an APHA color number of ≤ 300 as of the second aspect. A fourth aspect of the invention is directed to a molding comprising the zeolitic material having a framework structure comprising Si, O, and Ti as of the first aspect, as well as to the use of the molding as an adsorbent, an absorbent, a catalyst or a catalyst component. A fifth aspect of the invention relates to a process for oxidizing an organic compound comprising bringing an organic compound in contact with a catalyst comprising a molding as of the fourth aspect, wherein a sixth aspect relates to propylene oxide obtained or obtainable from the process according to the fifth aspect.

The Synthesis of Zeolite nanosheets from mining waste without using any OSDA or chemical reagents during the secondary growth of zeolite nanosheets is disclosed. The produced Zeolite nanosheet may be a synthetic material.

The invention provides a method for preparing catechol and hydroquinone through in-situ reaction of hydrogen and oxygen, and belongs to the technical field of organic chemistry. The invention provides a one-step green synthesis method of catechol and hydroquinone by taking hydrogen and oxygen as raw materials, which is characterized in that a specially designed Pd / Au-TS-1 bifunctional catalyst is adopted to realize in-situ generation of hydrogen peroxide from hydrogen and oxygen in a microchannel reactor, and the hydrogen peroxide and phenol are subjected to hydroxylation reaction immediately. Through cooperation of the high-performance bifunctional catalyst, the safe and efficient micro-reaction system and the green in-situ reaction process, a series of key problems of poor safety, serious environmental pollution, long process flow, high cost and the like in the prior art are successfully solved; and a new clean benzenediol production route with a high industrial application prospect is provided.

The invention discloses a titanium silicalite molecular sieve and a rolling ball forming preparation method thereof. The method comprises the following steps: S1, crystallizing the titanium silicalite molecular sieve to be subjected to rolling ball forming, and performing spray drying and roasting on slurry to obtain molecular sieve powder for rolling balls; s2, the molecular sieve powder prepared in the step S1, a binding agent, water and a lubricating agent are subjected to ball rolling primary forming, and primary formed wet balls are obtained; s3, mixing the primarily-formed wet pellets prepared in the step S2 with the molecular sieve powder prepared in the step S1, a binder, water and a lubricant, and carrying out ball rolling secondary forming to obtain secondarily-formed wet pellets; and S4, drying and roasting the secondary formed wet pellets prepared in the step S3 to obtain the final titanium silicalite molecular sieve subjected to ball forming. The step-by-step forming is combined with the use of the lubricant, the uniformity and size control of the ball are optimized, cracking or deformation is avoided, and the ball prepared by the method is high in strength and uniform in particle size, and has good application in olefin epoxidation.