43results about "Molecular-sieve compounds" patented technology

The application provides a coal-based solid waste flotation-metallurgy-material resource comprehensive utilization process method and application, and belongs to the technical field of coal-based solid waste comprehensive utilization.The coal-based solid waste is first separated by flotation to obtain residual carbon and tail ash; then the tail ash is dried and alkali melted to become active material; then the active material is leached and filtered to obtain leaching liquid and leaching residue, and Li and Ga in the leaching liquid are adsorbed and enriched; the adsorbed leaching liquid is adjusted in silicon-aluminum ratio, hydrothermally crystallized, filtered and high-temperature calcined to obtain mesoporous molecular sieve; the filtered silicon-containing alkali liquor is carbonized and calcined to obtain white carbon black; the tail ash and the leaching residue are mixed, and through moisture adjustment and curing process, a geopolymer product is obtained.The method in the application does not produce waste residue and waste water in the implementation process, finally obtains four products of Li and Ga enrichment product, geopolymer product, mesoporous molecular sieve and white carbon black, realizes full and comprehensive utilization of the coal-based solid waste, and has good environmental benefits and great significance.

The invention provides a mesoporous silicate molecular sieve as well as a preparation method and application thereof, and belongs to the technical field of molecular sieves. The framework component of the mesoporous silicate molecular sieve provided by the invention is only silica, 14 kinds of topology independent atoms are contained in the framework, a 36-membered ring one-dimensional mesoporous channel system is contained in the crystal structure of the mesoporous silicate molecular sieve, and the material is good in thermal stability and can be applied as a catalyst or an adsorbent.

The invention relates to a TS-1 molecular sieve, a preparation method thereof and application of the TS-1 molecular sieve in phenol hydroxylation reaction, and according to the preparation method, tetraethyl orthosilicate, tetrapropylammonium hydroxide, tetrabutyl titanate and amino acid are used as raw materials, crystallization is performed firstly, and then calcination is performed to prepare the TS-1 molecular sieve. The TS-1 molecular sieve catalyst is rich in a large amount of framework titanium, has high-activity hexa-coordinated titanium species, and can be used for efficient catalysis of phenol hydroxylation reaction. Compared with the prior art, the catalyst has excellent catalytic performance and excellent para-selectivity, and is simple in process, low in cost, good in stability and easy to popularize.

The application belongs to the field of molecular sieve material preparation, and relates to a method for synthesizing micron TS-2 molecular sieve with hierarchical pores, comprising the following steps: firstly, a silicon source, a titanium source, hydrochloric acid and deionized water are mixed according to a specific proportion, a high-dispersion SiO2-TiO2 precursor powder is obtained through a spray drying device, then the precursor powder is added into a TBAOH solution to form an initial gel, micron TS-2 molecular sieve is obtained by controlling hydrothermal crystallization conditions; then the micron TS-2 molecular sieve is fully mixed with an organic alkali solution and deionized water, and stirring is performed to obtain a mixed slurry; the mixed slurry is transferred into a crystallization kettle with a stirring device, and is subjected to a high-temperature crystallization process, and then is subjected to washing, separation, drying and calcination to obtain a micron TS-2 molecular sieve product with a hierarchical pore structure. The organic alkali post-treatment strategy is adopted, mesoporous structures are successfully introduced while the micron size is maintained, and the mass transfer efficiency and active site accessibility of the molecular sieve are significantly improved.

Provided is a method of preparing mesopore Y zeolite catalysts with larger mesopore sizes. The method employs swelling agents, and optionally cosolvents. The larger mesopores improve accessibility for mass transport of bulky reactants. In the preparation a swelling agent is used in combination with cetyltrimethylammonium bromide (CTAB). Cosolvents can also be used to affect a strong swelling effect.

The invention provides an isomorphous substituted titanium silicalite molecular sieve as well as a preparation method and application thereof, and belongs to the technical field of molecular sieve preparation. The preparation method comprises the following steps: firstly, mixing a pure silicon layered precursor and an ammonium fluoride organic solution, and reacting to obtain a chambering material; and dispersing the pore-enlarging material in ethanol, adding a titanium source for reaction, drying and roasting to obtain the isomorphous substituted titanium silicalite molecular sieve. According to the method, the pure silicon layered precursor is subjected to pore expansion by adopting the ammonium fluoride organic solution, so that compared with a traditional ammonium fluoride aqueous solution, the damage to the structure of the layered precursor is avoided, and the integrity of a molecular sieve framework is favorably kept. According to the invention, the pore-enlarging material is dispersed in ethanol, and then the titanium source is added for reaction, so that generation of non-framework titanium is inhibited, and more framework titanium active centers can be formed.

This invention discloses a gallium-silicon molecular sieve, its preparation method, and its application. The chemical composition of the gallium-silicon molecular sieve is SiO2·nGa2O3, where n is the molar ratio of Ga2O3 to SiO2, and the value of n ranges from 0.001 to 0.01. The morphology of the gallium-silicon molecular sieve is a coffin-like lamellar morphology, and its average thickness along the b-axis is 25-100 nm. The preparation method of the gallium-silicon molecular sieve includes the following steps: (1) mixing a silicon source, a template agent, a growth regulator, and water to prepare a seed crystal suspension; (2) mixing the silicon source, gallium source, template agent, water, growth regulator, and the seed crystal suspension to obtain an initial gel, which is then recrystallized to obtain the gallium-silicon molecular sieve. The molecular sieve provided by this invention is used as a catalyst in the alkylation reaction of benzene and methanol, exhibiting high benzene conversion rate and high selectivity for the target product.

The present application relates to a kind of method for preparing zeolite molecular sieve with steel slag, belong to metallurgical resource comprehensive utilization technical field.The preparation method includes: in the process of slagging in steel smelting production, adding modifier to steel slag, obtaining modified steel slag, magnetic separation, obtaining tailing of magnetic separation, after grinding, leaching in acidic solution, the pH of leaching process is maintained constant in one range between 0~7, obtain leaching solution and leaching tailing;The above-mentioned leaching solution is adjusted to pH 7~7.5 with alkaline solution, and silicon-aluminum gel is obtained;Alkaline solution and structure directing agent are added to the above-mentioned silicon-aluminum gel, stirred and reacted, and zeolite molecular sieve precursor solution is obtained, and zeolite molecular sieve is obtained by crystallization.The present application replaces natural silicon-aluminum source with steel slag, and the raw material source is wide, the cost is low, the process flow is simple, the high-value utilization of steel slag can be realized, and the application economy and environmental benefits of zeolite material in the field of CO2 capture are significantly improved.

The application discloses a molecular sieve membrane and a preparation method and application thereof in low-abundance protein enrichment, and the preparation method comprises the following steps: 1) polishing a support body to be smooth, drying after ultrasonic treatment; 2) adding an alcohol solution to the dried support body, then adding a certain amount of a coupling agent and ammonia water, taking out the support body after stirring, and drying the support body for standby use; 3) adding an alkali source into deionized water, completely dissolving, then adding a template agent, a stabilizer and a surfactant, and dissolving; 4) adding a silicon source and an alkali metal source into step 3), dissolving, then adding the dried support body in step 2), crystallizing at room temperature, then hydrothermally crystallizing, taking out the support body after the hydrothermal crystallization, washing, drying and calcining, so that the molecular sieve membrane is obtained. The molecular sieve membrane is simple in operation, the surface of the synthesized molecular sieve membrane is continuous and dense, the surface of the molecular sieve membrane retains the superior protein adsorption performance of the molecular sieve material, and the molecular sieve membrane can effectively improve the protein identification number.

The invention discloses a preparation method and application of a functionalized mesoporous material SBA-15, and relates to the field of chemical synthesis and photoelectrocatalysis materials.Organic functionalization is conducted on SBA-15 through a grafting method, and an amino-functionalized mesoporous material NH2-SBA-15 is obtained; and carrying out salicylaldehyde functionalization treatment on the amino functionalized mesoporous material NH2-SBA-15, so as to obtain the salicylaldehyde functionalized mesoporous material S-SBA-15. The functionalized mesoporous material NH2-SBA-15 and the functionalized mesoporous material S-SBA-15 can be used for photoelectrocatalytic reduction of CO2, and have good photoelectrocatalytic activity and stability.

The present application relates to the field of molecular sieve preparation, discloses a kind of molecular sieve matrix pellet strength improver and its preparation method and application and the preparation method of molecular sieve matrix pellet, the preparation method of molecular sieve matrix pellet strength improver includes: 1) clay mineral aggregate is mixed with sodium source, and clay base material is obtained;2) after being pulverized treatment, clay base material is calcined with hole expansion aid;Wherein, the clay mineral aggregate is the mixture of halloysite, kaolinite and montmorillonite, the water content of the clay mineral aggregate is 20-40wt%, the Fe2O3 content in the clay mineral aggregate is 0.01-0.1wt%, in the mixture of the clay mineral aggregate and the hole expansion aid, the particle size of 300-600 mesh accounts for more than 98%, and the sodium source is Na2O.The strength improver prepared by the method has high viscosity and hygroscopicity, and good plasticity.

The invention discloses a method for preparing a titanium silicalite molecular sieve catalyst by supergravity and application thereof, and the method comprises the following steps: 1) mixing a titanium source and a silicon source to obtain a solution A; 2) mixing an organic template agent with water to obtain a solution B; (3) simultaneously pumping the solution A and the solution B into an external circulation supergravity reactor, and carrying out premixing and hydrolysis reaction on the solution A and the solution B at the lower end of the external circulation supergravity reactor; 4) pumping the premixed mixed gel into a crystallization tank, and continuing nucleation and crystallization under a high-temperature condition; and 5) filtering, washing, drying and calcining a product synthesized by reaction in the crystallization tank to obtain the titanium silicalite molecular sieve catalyst. The particle size of the titanium silicalite molecular sieve catalyst prepared by the method is 20-500nm, and the specific surface area is 300-550m < 2 > / g; the titanium silicalite molecular sieve prepared by the method provided by the invention has obviously improved catalytic activity and selectivity in ketone ammoximation reaction.

A method of preparing a mesoporous Y zeolite catalyst having a larger mesoporous size is provided. The method uses a swelling agent, and optionally a co-solvent. And the mass transfer accessibility of large-volume reactants is improved by virtue of relatively large mesopores. In this preparation, a swelling agent is used in combination with cetyltrimethylammonium bromide (CTAB). A co-solvent can also be used to influence the strong swelling effect.

The present application relates to the technical field of molecular sieve, and discloses a method for preparing a silicon-modified titanium-silicon molecular sieve, the modified titanium-silicon molecular sieve and application thereof, the method comprising the following steps: (1) subjecting a mixed solution containing a silicon source, a titanium source, an alkali source, water and a first organosilicon to hydrothermal crystallization; then performing solid-liquid separation, first drying and calcination; (2) contacting the calcination product obtained in step (1) with a second organosilicon, and then performing second drying; wherein the first organosilicon and the second organosilicon are each independently selected from at least one of the organosilicons shown in formula (1); in formula (1), R1, R2, R3 and R4 are each independently selected from H, an alkyl group, an alkoxy group, an aminoalkyl group, an alkylamine group and halogen. The method of the present application can obtain a titanium-silicon molecular sieve with a relatively high oxygen hole content.

The application relates to the technical field of molecular sieves, and discloses a titanium-silicon molecular sieve, a supported catalyst and application, the titanium-silicon molecular sieve has a silicon-titanium molar ratio of 100:0.05-15; and the content of oxygen vacancies in the titanium-silicon molecular sieve is 0.35-2.2 mmol / g. The catalyst prepared by using the titanium-silicon molecular sieve with the specific oxygen vacancy content as a carrier has high thermal stability, and when the catalyst is used for catalyzing propylene gas phase method to prepare propylene oxide, the conversion rate of propylene, the selectivity of propylene oxide and the service life of the catalyst can be improved.

To provide modified metal-organic framework (MOF) materials, methods of preparing the same, and processes using the same.SOLUTION: A modified MOF of the invention is modified by impregnating a MOF with an inorganic metal salt. The starting MOF comprises at least one linker or ligand, which comprises an aryl amino group as part of its structure. The modified MOF is able to adsorb either basic or acidic toxic industrial compounds (TICs). The modified MOF can be used to remove TICs from various gaseous streams such as air.SELECTED DRAWING: None

The invention is applicable to the technical field of catalysts, and provides a preparation method and application of a Co-MCM-48 and Co-S-1 eutectic molecular sieve with a micro-mesoporous structure, the Co-MCM-48 and Co-S-1 eutectic molecular sieve forms the microporous Co-S-1 eutectic structure in the process of synthesizing the mesoporous Co-MCM-48 molecular sieve, and the Co-MCM-48 and Co-S-1 eutectic molecular sieve is a novel mesoporous and microporous coexisting molecular sieve. The preparation method is simple, green, environment-friendly and low in cost. The reaction activity in the reaction of preparing 1-(4-methylphenyl) ethanol and 4-methylacetophenone by oxidizing 4-ethyltoluene is high. And the catalyst is easy to recover, the structure of the catalyst is kept stable after the reaction, and the technical problems of poor hydrothermal stability, unstable structure and the like of the traditional mesoporous MCM series pure silicon molecular sieve are solved. The used cobalt-containing porous material is good in stability and high in activity, can be recycled, and has a wide application prospect.

The present application relates to the technical field of lithium battery, and in particular to a method for preparing lithium bisfluorosulfonimide by using sulfuric fluoride; the present application adopts sulfuric fluoride, ammonia gas, organic base, solvent and lithium hydroxide to prepare lithium bisfluorosulfonimide; the present application firstly purifies preliminarily through distillation and extraction, then filters, and further removes trace impurity components in the crude product after adsorption by fluoric acid group molecular sieve, so as to obtain high-purity lithium bisfluorosulfonimide; the process route of the present application avoids the generation of waste gas such as SO2 and HCl, and is more in line with environmental protection requirements; the present application has the advantages of simple process, strong operability, very obvious purification effect and the like, and has the conditions for industrial production.

The invention discloses a preparation method and application of a nanosheet-shaped TS-1 molecular sieve, and relates to the technical field of catalysts. The TS-1 molecular sieve is synthesized through a biquaternary ammonium salt structure directing agent containing a benzene ring; the obtained TS-1 molecular sieve has abundant surface active sites, and almost does not contain impurities such as non-framework titanium and anatase type TiO2; meanwhile, due to the nanosheet-shaped morphology, the diffusion and mass transfer performance of macromolecular reactants in the catalysis process is remarkably improved, and the accessibility of active sites is effectively enhanced; in a cyclohexene epoxidation reaction, the molecular sieve shows excellent catalytic performance and shows a good application prospect; the problems that the TS-1 molecular sieve is remarkable in pore channel diffusion limitation and low in active site accessibility in the catalysis process are solved.

To provide an inorganic bacteriostatic slurry that has a long lasting effect.SOLUTION: An inorganic bacteriostatic slurry has porous silica doped with a bacteriostatic metal, the porous silica suspended in a dispersant. For example, the bacteriostatic metal is copper, zirconium, cobalt.SELECTED DRAWING: None

The invention discloses a preparation method of a flaky mesoporous material with both specific surface area and mechanical strength, which comprises the following steps: S1, taking an organic auxiliary agent and inorganic ordered mesoporous material powder according to a mass ratio of (0.2-1.0): 100, and carrying out spray coating to form a premix; s2, pressing and shaping the premix to obtain a sheet-shaped green body; s3, heating the sheet-shaped green body to 500 DEG C, and preserving heat to obtain a sheet-shaped mesoporous material; according to the method disclosed by the invention, dynamic balance between pore structure maintenance and mechanical enhancement is realized through hydrogen bond / complexation of assistant molecules and silicon hydroxyl, dual-stage stress regulation and control in a tabletting process and a slow-release stress mechanism in a sintering process, the specific surface area retention rate of the obtained flaky mesoporous material SBA-15 is greater than or equal to 76%, the pore diameter retention rate is greater than or equal to 85%, the pore channel orderliness retention rate is greater than or equal to 80%, and the specific surface area retention rate is greater than or equal to 90%. The compression modulus is greater than or equal to 41.38 MPa, and the fracture energy is greater than or equal to 0.238 MPa.

To provide a visual tracking sensor for uranium 238 isotope that is an optical sensor which has specific sensitivity and selectivity for detecting / extracting U(VI) ions of low concentration from different environments, and has speedy performance for optical detection with high selectivity and also has a separation process made efficient.SOLUTION: There is provided a visual tracking sensor for uranium 238 isotope that comprises mesoporous silica having a three-dimensional hexagonal monolith type worm-shaped higher order structure, a chelate compound modified on a surface of the mesoporous silica, and an organic coloring chelate-based probe modified on the chelate compound.SELECTED DRAWING: Figure 17C

The application provides a method for synthesizing pure-silicon ITH molecular sieve containing double tetranuclear rings without fluorine, and relates to the technical field of molecular sieves.The method comprises the following steps: (1) mixing a silicon source, a template agent, an alkali source, water and pure-silicon ITH molecular sieve seeds to obtain a molecular sieve mother liquor; the template agent comprises hexamethonium hydroxide and / or hexamethonium bromide; the silicon source is calculated in terms of SiO2; and the molar ratio of the silicon source, the template agent, the alkali source and the water in the molecular sieve mother liquor is 1:(0.1-2.0):(0-1.0):(1.0-50.0); (2) performing hydrothermal crystallization on the molecular sieve mother liquor to obtain the pure-silicon ITH molecular sieve with double tetranuclear rings. The method adopts a template agent, seed assistance and a hydrothermal synthesis method to obtain the pure-silicon ITH molecular sieve with double tetranuclear rings, realizes the fluorine-free synthesis of the molecular sieve, avoids the use of toxic fluorine ions, and is simple in operation and green in synthesis route.

The application discloses a core-shell structure multi-level hole double-molecular sieve and a preparation method and application thereof. The core-shell structure multi-level hole double-molecular sieve takes a core molecular sieve as a core and takes an MCM-41 molecular sieve as a shell; the core molecular sieve is an Hbeta molecular sieve and / or a ZSM-5 molecular sieve. The conversion rate of raw material 2-butene is high and the selectivity of product 1-butene is high by using the MCM-41 molecular sieve to coat the Hbeta molecular sieve or the ZSM-5 molecular sieve. The catalyst preparation method is stable, controllable and good in reproducibility; steps and production equipment are simple; raw materials and reagents used are common and easy to obtain and low in price, and the method is favorable for large-scale industrial application.

The invention discloses a two-step crystallization method for synthesizing a mesoporous molecular sieve with high aluminum content under an alkali metal / alkaline earth metal assisted neutral condition, which comprises the following steps: firstly, dissolving a template agent and inorganic salt in deionized water, and fully stirring to obtain a uniform template agent solution; the preparation method comprises the following steps: uniformly mixing a silicon source with deionized water, alkali metal salt or alkaline earth metal salt or transition metal salt / dilute sulphuric acid solution to prepare a silicate solution and a metal salt solution; the invention provides a two-step crystallization strategy to improve the aluminum introduction efficiency of the mesoporous molecular sieve under a neutral condition. The method comprises the following steps: firstly, pre-implanting ions of alkaline earth metal or alkali metal or transition metal into a mesoporous silicate skeleton in a primary crystallization process; subsequently, in a second crystallization stage, metal ions in the frameworks can interact with aluminum species, and serve as preferential anchoring points to effectively promote aluminum to enter the frameworks, so that neutral synthesis of the high-aluminum-content mesoporous molecular sieve is synergistically realized.

The invention discloses an amino-functionalized mesoporous silica-based molecular sieve adsorption material as well as a preparation method and application thereof. The amino-functionalized mesoporous silica-based molecular sieve adsorption material is prepared from copper tailings as a raw material through the steps of pretreatment, main reaction and aftertreatment. The mesoporous molecular sieve material is suitable for heavy metal pollutant treatment and functional building material development. The method is simple and convenient to prepare, low in cost and excellent in adsorption performance, lead and cadmium ions in water can be effectively removed, and the prepared building material is green, environmentally friendly and free of pollution.

The utility model belongs to the technical field of slurry preparation devices in molecular sieve production, and particularly relates to a molecular sieve slurry preparation device with a dustproof effect. The molecular sieve slurry preparation device with the dustproof effect comprises a roasting furnace, a material collecting box is arranged at the tail of the roasting furnace, the material collecting box is connected with a furnace tail bag-type dust collector, the furnace tail bag-type dust collector is connected with a furnace tail pulping tank through an auger, the furnace tail pulping tank is provided with a pipeline connected with the material collecting box, and the furnace tail pulping tank is connected with a coarse material slurry tank. According to the molecular sieve slurry preparation device with the dustproof effect, the stainless steel pipeline is arranged between the top of the furnace tail pulping tank and the roasting furnace material collecting box, so that the problem of dust on a production site is effectively reduced, the stability of subsequent grinding is ensured, meanwhile, negative pressure in the roasting furnace is fully utilized, cyclic utilization of the dust is realized, and the production cost is reduced. The utilization rate of resources is improved, and the production environment is ensured.

The application discloses a preparation method of silicalite-1 molecular sieve and ZSM-5 molecular sieve. The molecular sieve has uniform crystal grain size and small crystal grain, which is beneficial to mass transfer and diffusion in the silicalite-1 molecular sieve and ZSM-5 molecular sieve crystals; the regular molecular sieve crystal grain is more beneficial to keeping the structure stable of the molecular sieve under the use condition and improving the service life of the molecular sieve. The method for synthesizing the silicalite-1 molecular sieve and the ZSM-5 molecular sieve by using guanidino acetic acid as an additive can prepare the silicalite-1 molecular sieve and the ZSM-5 molecular sieve crystals with the crystal grain size distribution of 140-160 nm and regular crystal shape.

The invention relates to the field of catalytic chemistry, in particular to a hierarchical pore TS-1 molecular sieve as well as a preparation method and application thereof. The preparation method of the hierarchical pore TS-1 molecular sieve provided by the invention comprises the following steps: firstly preparing TS-1 nanocrystals, then introducing an organosilane reagent for silanization treatment and crystallization treatment, and finally calcining and pickling to prepare the hierarchical pore TS-1 molecular sieve. According to the invention, hydrothermal synthesis and silanization modification are combined, and efficient preparation of the hierarchical porous material can be realized through a simple process. The prepared hierarchical pore TS-1 molecular sieve shows excellent activity and selectivity in catalytic performance, especially has significant advantages in macromolecular substrate reaction, is easy to separate and recover, and is suitable for industrial application.

This method for producing an epoxide uses a titanium-containing silicon oxide catalyst that includes a salt at a predetermined concentration.