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3180 results about "Mesoporous silica" patented technology
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Mesoporous silica is a mesoporous form of silica and a recent development in nanotechnology. The most common types of mesoporous nanoparticles are MCM-41 and SBA-15. Research continues on the particles, which have applications in catalysis, drug delivery and imaging.
Olefin metathesis reaction catalyst and preparation method therefor
ActiveUS20190217277A1Separated/recovered readilyEasy to useMolecular sieve catalystsOrganic-compounds/hydrides/coordination-complexes catalystsRheniumUnsaturated hydrocarbon
The present invention relates to an olefin metathesis reaction catalyst where rhenium (Re) oxide or molybdenum (Mo) oxide is supported, as a catalyst main component, on a surface-modified mesoporous silica or mesoporous alumina support, and a preparation method therefor. The olefin metathesis reaction catalyst of the present invention allows highly efficient metathesis of long-chain unsaturated hydrocarbons having at least eight carbons at a low temperature of 150° C. or lower. The catalyst can be separated readily from reaction solution, regenerated at a low temperature of 400° C. or lower by removing toxins accumulated on it during the metathesis reaction, and used repeatedly in metathesis reaction many times, thereby being made good use in commercial olefin metathesis processes.
Owner:KOREA RES INST OF CHEM TECH
Modified adsorbent for dry scrubbing and use thereof
The present invention provides an amine functionalised adsorbent for use in dry scrubbing process. The adsorbent comprises amine functionalised mesoporous silica in which the amine groups are present at or near the surface of the silica, including within the pore walls and channels of the silica. The present invention further provides methods of preparing the adsorbent and of using the adsorbent for the adsorption of CO2 and / or other acid gases.
Owner:UNIVERSITY OF OTTAWA
Antimicrobial mesoporous silica nanoparticles
InactiveUS20060018966A1Reduce productionSlow diffusion ratePowder deliveryBiocideMesoporous silicaSilicon dioxide
Methods for preparing a series of mesoporous silicates, such as room-temperature ionic liquid (RTIL)-templated mesoporous silicate particles, with various particle morphologies are provided. Methods for preparing silicate particles with antimicrobial agents within the MSN pores is also provided. The particles can be used as controlled-release nanodevices to deliver antimicrobial agents.
Owner:IOWA STATE UNIV RES FOUND
Ordered mesopore silica mixed matrix membranes, and production methods for making ordered mesopore silica mixed matric membranes
InactiveUS20070022877A1Enhanced interactionEffectively incorporated into polymer structureSemi-permeable membranesOrganic-compounds/hydrides/coordination-complexes catalystsMesoporous silicaSilicon dioxide
Mixed matrix membranes are prepared from mesoporous silica (and certain other silica) and membrane-forming polymers (such as polysulfone), in a void free fashion where either no voids or voids of less than 100 angstroms are present at the interface of the membrane-forming polymer and the silica. Such silica-containing mixed matrix membranes are particularly useful for their selectivity (such as carbon dioxide selectivity) and permeability. Methods for separating carbon dioxide are provided.
Owner:VIRGINIA TECH INTPROP INC
Method for forming mesoporous silica layer, its porous coating, Anti-reflection coating, and optical member
InactiveUS20100136319A1Low refractive indexLayered productsPretreated surfacesPtru catalystActive agent
A method for forming a mesoporous silica layer composed of nanometer-sized, mesoporous silica particles on an optical substrate or a dense layer formed thereon, comprising the steps of (1) hydrolyzing and polycondensing alkoxysilane in a solvent containing a catalyst, a cationic surfactant and a nonionic surfactant to prepare composites comprising nanometer-sized, mesoporous silica particles and these surfactants, (2) applying a solution containing the composites to the substrate or the dense layer, (3) drying the solution to remove the solvent, and (4) removing both surfactants by baking the resultant coating at 120-250° C. in an oxygen-containing gas atmosphere, or plasma-treating it using an oxygen-containing gas.
Owner:RICOH IMAGING COMPANY +1
Method for preparing mesoporous silica molecular sieve fiber
InactiveCN101387019AIncrease the areaIncrease the apertureInorganic material artificial filamentsMolecular-sieve and base-exchange compoundsFiberNanowire
The present invention discloses a method for preparing a wide aperture mesoporous silica molecular sieve fiber. An industrialized nonionics or cationic surfactant is adopted as a template. An organic or inorganic silicon source is adopted as a precursor. In the state where various auxiliary reagents, such as inorganic salt, alcohol and the like, are added, the fiber is synthesized through the cooperative assembly between a surface active agent and inorganic species and a hydrothermal treatment process. The mesoporous silica molecular sieve fiber is between 3 and 20 nm in aperture, between 0.3 and 2.5 cm^3 / g in pore volume, and between 600 and 1200 cm^2 / g in specific area. The material is easy to obtain, the technical requirements are comparatively simple, and the operation is feasible. The method has a very wide application range in terms of the preparation of composite fortifying fiber and semiconductor porous nanometer tube and nanometer wire in the fields of nanometer microelectrode and aviation material.
Owner:SHANGHAI INST OF TECH
Mesoporous silica nanoparticle-mediated delivery of DNA into arabidopsis root
InactiveUS20130185823A1MicroorganismsOther foreign material introduction processesGerm layerGene delivery
Transient gene expression is a powerful tool for plant genomics studies. Recently, the use of nanomaterials has drawn great interest. Delivery with mesoporous silica nanoparticles (MSNs) has many advantages. We used surface-functionalized MSNs to deliver and express foreign DNA in Arabidopsis thaliana root cells without the aid of particle bombardment. Gene expression was detected in the epidermis layer and in the more inner cortex and endodermis root tissues. This method is superior to the conventional gene-gun method to deliver DNA, which delivers the gene to the epidermis layer only. Less DNA is needed for the MSN method. Our system is the first use of nanoparticles to deliver DNA to plants with good efficiency and without external aids. MSNs, with multifunctionality and the capability of cargo delivery to plant cells as we demonstrated, provide a versatile system for biomolecule delivery, organelle targeting, and even agriculture, such as improved nutrient uptake.
Owner:ACAD SINIC +1
Fast luminescent silicon
There are provided mesoporous silica materials containing in their pores stabilized clusters of silicon atom, of size 2 nanometers or less, and capable of photoluminescence to emit fast photons. They are prepared by chemical vapor deposition of silicon or a silicon precursor such as disilane, under soft conditions such as temperature of 100-150 DEG C., into the mesopores of silicate films which have mesoporous channels prepared by growth of the films using a template to control their sizes, but without removing the template residues from the films prior to the chemical vapor deposition. The template residues serve to limit the size of the silicon clusters which conform. The use of the soft conditions on CVD retains the template residues in an intact, substantially unchanged form. The resultant films have clusters of silicon, of 2 nanometer size or less, anchored to the mesopores, and air stable, so that they can be used in optoelectronic devices in conjunction with standard silicon semiconductors.
Owner:THE GOVERNINIG COUNCIL OF THE UNIV OF TORANTO
Synthesis of attrition-resistant heterogeneous catalysts using templated mesoporous silica
The present invention relates to catalysts in mesoporous structures. In a preferred embodiment, the invention comprises a method for encapsulating a dispersed insoluble compound in a mesoporous structure comprising combining a soluble oxide precursor, a solvent, and a surfactant to form a mixture; dispersing an insoluble compound in the mixture; spray-drying the mixture to produce dry powder; and calcining the powder to yield a porous structure comprising the dispersed insoluble compound.
Owner:STC UNM +1
Supported polyoxometalates and process for their preparation
InactiveUS7417008B2Group 4/14 element organic compoundsOxygen/ozone/oxide/hydroxideCatalytic oxidationMesoporous silica
Owner:EXXONMOBIL CHEM PAT INC
Preparation method of hollow mesoporous silica nanoparticle
InactiveCN102786061ALow priceEasy to operateMaterial nanotechnologySilicaMesoporous silicaComposite nanoparticles
The invention relates to a preparation method of a hollow mesoporous silica nanoparticle. The preparation method comprises the following steps: obtaining a polymer-silica composite nanoparticle having a core-shell structure by adopting spherical aggregations of an amphiphilic segmented copolymer in an aqueous solution and a cationic surfactant hexadecyl trimethyl ammonium bromide as double templates and ethyl orthosilicate as a silicon source and by hydrolyzing the silicon source under an alkaline condition; and calcining to remove the templates to obtain the hollow mesoporous silica nanoparticle. The preparation method has the advantages of simplicity, mild reaction condition, and cheap experiment raw materials, and the prepared mesoporous silica nanoparticle has the advantages of high specific surface area, high pore volume, and good biological compatibility. The hollow structure enables the drug loading amount to be substantially improved, nanometer gold, nanometer silver, magnetic iron oxide particles, quantum dots, a contrast agent and the like to be loaded, so the hollow mesoporous silica nanoparticle can be used as a targeting drug release carrier, can be used for magnetic resonance image analysis, and has good application prospects in the fields of the diagnosis and the treatment of cancers.
Owner:DONGHUA UNIV
Anti-reflection coating and its production method
ActiveUS20090220774A1Improve anti-reflection effectImprove adhesionMaterial nanotechnologyLayered productsRefractive indexMesoporous silica
An anti-reflection coating comprising a mesoporous silica coating composed of mesoporous silica nano-particles formed on a substrate or a dense coating formed on the substrate, the mesoporous silica coating having a refractive index of more than 1.10 and 1.35 or less.
Owner:PENTAX RICOH IMAGING CO LTD +1
Hollow-structured mesoporous silica material and preparation process
A hollow-structured mesoporous silica material composed of hollow silica particles that have a shell having radial-arrayed channels, and a process for its preparation. The thin-shell type of mesoporous materials with different morphologies are prepared by growing and synthesizing mesoporous silica on the surface of calcium carbonate nanoparticles with different shapes as inorganic templates, and then removing the inorganic templates. The hollow-structure mesoporous silica material can be used in many fields such as the preparation of catalyst, pesticide and optical fiber.
Owner:BEIJING UNIV OF CHEM TECH +1
Cationic polymer coated mesoporous silica nanoparticles and uses thereof
InactiveUS20120207795A1Reduces translation of proteinReduce translationOrganic active ingredientsGenetic material ingredientsNanoparticleMesoporous silica
A submicron structure having a silica body defining a plurality of pores is described. The submicron body may be spherical or non-spherical, and may include a cationic polymer or co-polymer on the surface of said silica body. The submicron structure may further include an oligonucleotide and be used to deliver the oligonucleotide to a cell. The submicron structure may further include a therapeutic agent and be used to deliver the therapeutic agent to a cell. An oligonucleotide and therapeutic agent may be used together. For example, when the oligonucleotide is an siRNA, the composition may be used to decrease cellular resistance to the therapeutic agent by decreasing translation of a resistance gene.
Owner:RGT UNIV OF CALIFORNIA
Silicon dioxide mesoporous material and its preparing method
The mesoporous silica material consists of hollow silica grains with radically radial arranged hole canal in the wall. The present invention also provides the preparation process of the said mesoporous silica material, and the preparation process includes adopting calcium carbonate in different forms as inorganic template; growing and synthesizing mesoporous material on the surface and subsequent eliminating the inorganic template to obtain thin shell type mesoporous material in different forms. The present invention also provides the application of the mesoporous silica material in preparing catalyst, pesticide and optical fiber.
Owner:XIAMEN NANOTECH +1
Process for the preparation of metal-containing nanostructured films
InactiveUS7001669B2Sufficient structural integrityHigh mechanical strengthNanotechLayered productsNanowireMesoporous silica
Metal-containing nanostructured films are prepared by electrodepositing a metal-containing composition within the pores of a mesoporous silica template to form a metal-containing silica nanocomposite. The nanocomposite is annealed to strengthen the deposited metal-containing composition. The silica is then removed from the nanocomposite, e.g., by dissolving the silica in an etching solution to provide a self-supporting metal-containing nanostructured film. The nanostructured films have a nanowire or nanomesh architecture depending on the pore structure of the mesoporous silica template used to prepare the films.
Owner:TULANE EDUCATIONAL FUND
Superparamagnetism mesoporous silicon dioxide composite ball and preparing method thereof
InactiveCN101256864ALarge specific surface areaHigh content of magnetic substancesSilicaInorganic material magnetismParticulatesMesoporous silica
A superparamagnetism mesoporous silicon dioxide composite ball of the present invention and manufacture method thereof belong to nucleocapsid type technology field of magnetic nano particle. The shape of the composite ball is global; inner core being made of magnetic ferrite nano particle cluster, shell coating layer being made of mesoporous silicon dioxide; quality ratio of magnetic ferrite nano particle in particulate being 40-80%. Method of manufacturing has that producing magnetic ferrite nano particle is by using coprecipitation method; executing surface modification by adding oleic acid stirring; ultrasonic forming oil-in-water emulsion in the mix solution of ethyl orthosilicate and cyclohexane, cetyl trimethyl ammonium bromide as surfactant; ethyl orthosilicate hydrolytic condensation forming mesoporous silicon dioxide coating layer by adding ammonia spirit; finally taking off molding plate and getting products. Product of the invention has bigger specific surface area and stronger magnetic separation capacity, and has good dispersancy in water, and is further functionalization after being decorated at surface. The method of the present invention has simple process, and lower equipment requirement.
Owner:JILIN UNIV
Graphene-coated mesoporous metallic oxide, and preparation method and use thereof
InactiveCN102437320AHigh charge and discharge capacityImprove cycle performanceCell electrodesMesoporous silicaSilicon dioxide
The invention relates to a graphene-coated mesoporous metallic oxide, and a preparation method and use thereof. The preparation method for the graphene-coated mesoporous metallic oxide comprises the following steps of: 1) synthesizing mesoporous metallic oxides with different pore passage structures by taking mesoporous silicon dioxides with the different pore passage structures as templates; 2) preparing a graphene oxide by using an oxidation method; 3) absorbing mesoporous metallic oxide particles on the surface of the graphene oxide by using a heterocoagulation method; 4) reducing the graphene oxide into graphene by adding a reducing agent; and 5) performing centrifugal separation, washing and drying. The graphene-coated mesoporous metallic oxide provided by the invention has high electrochemical properties, and can be used as an electrode material of a lithium battery.
Owner:BEIJING NORMAL UNIVERSITY
Hollow mesoporous silica microsphere, preparation method and application thereof
InactiveCN102432024ARealize internal and external transmissionIncrease dissolution rateSilicaPharmaceutical non-active ingredientsMicrosphereDrug carrier
The invention discloses a hollow mesoporous silica microsphere with hollow core and adjustable mesopore and penetrating through a shell, preparation method and application thereof. The hollow mesoporous silica microsphere is obtained by the following steps: under the condition of acid or alkaline solution, taking hexadecyl trimethyl ammonium bromide or PEO-PPO-PEO triblock copolymer as template, adding non-polar solvent, stirring at a certain temperature, emulsifying, then adding silica source, after hydrolysis and condensation, filtering, drying, and roasting to remove the template. The preparation method has simple technique and short time, easy operation and low cost, the prepared microsphere comprises both macropore and mesopore structures, the mesopore penetrates through the shell, the aperture thereof is larger than 5nm and is adjustable within the range of 5-20nm, and by relatively large mesopore channel, internal and external transmissions of large guest molecules can be realized. The microsphere can be used as drug carrier, the drug loading amount can exceed 50% (mass percentage), and the drug release can be controlled by adjusting aperture of the mesopore and dissolutionrate of indissolvable drug can be improved.
Owner:广州万泽医药科技有限公司
Method for preparing catalyst used in method for preparing ethanediol by dimethyl oxalate hydrogenation
InactiveCN101411990AHigh catalytic activityImprove catalytic selectivityMolecular sieve catalystsOrganic compound preparationCopper nitrateMesoporous silica
The invention relates to the field of chemical technology, in particular to a method for preparing a catalyst for hydrogenating dimethyl oxalate to prepare glycol. The method comprises the following steps: step one, copper nitrate is used to prepare a cuprammonium complex compound; step two, the cuprammonium complex compound is added with a mesoporous silica molecular sieve, is dripped with distilled water, and is filtered, washed, dried and roasted to prepare a catalyst precursor; and step three, the catalyst precursor is reduced in a hydrogen-nitrogen mixed atmosphere to prepare the catalyst. In the catalyst, according to mass percentage, the content of copper is between 5 and 40 percent; and the content of the mesoporous silica molecular sieve is between 60 and 95 percent. The method has the advantages that a silicon copper catalyst prepared through the new method has high catalytic activity and glycol selectivity in the reaction of hydrogenating the dimethyl oxalate to prepare the glycol, has long service life, smooth reaction performance and easy control.
Owner:FUDAN UNIV
Ultra-stable lamellar mesoporous silica compositions and process for the preparation thereof
InactiveUS6528034B1High thermalEffective recovery and recyclabilitySilicaMolecular-sieve silica-polymorphsMesoporous silicaSilicon dioxide
Novel lamellar mesoporous silica compositions which can contain functional inorganic elements and organic functional groups as part of the lamellar silica framework structure are described. The compositions are prepared using gemini amine surfactants as templates or structure directing agents. The compositions have novel high temperature and hydrothermal stability and unique fundamental particle structures.
Owner:BOARD OF TRUSTEES OPERATING MICHIGAN STATE UNIV
Nanometer mesoporous silica-based xerogel styptic material and its preparing process and application
ActiveUS20090232902A1Improve adsorption capacityHigh porosityBiocideSilicaAdditive ingredientTherapeutic effect
The invention disclosed a novel mesoporous silica-based xerogel and its use in hemorrhage control. The mesoporous silica-based xerogel material has tunable mesopores (1-50 nm), high specific surface area (100-1400 m2 / g), macroscopical morphology (powder, film, disc, column, etc.) and adjustable compositions (SiO2, CaO and P2O5, etc.) as well as good biodegradation. The mesoporous silica-based xerogels herein effectively promote the blood clotting under various conditions including slow and severe hemorrhage, even at the blood oozing site of bone defect. Meanwhile, the networks of silica-based xerogel with good elastic and mechanic properties, formed by adsorbing a large amount of water, can modulate the cell behavior and tissue growth, and thus promote the wound healing. Additionally, due to the mesoporous structure, the materials have the potential to load drug, thrombin and bioactive factors, which is favorable for the therapeutical efficacy.
Owner:SUZHOU BAIJI BIOTECH CO LTD
Ordered mesoporous carbon composite catalyst, method of manufacturing the same, and fuel cell using the same
An ordered mesoporous carbon (OMC) composite catalyst includes an OMC; and metal particles and at least one component selected from a group consisting of nitrogen and sulfur included in the OMC. The ordered mesoporous carbon composite catalyst may be formed by impregnating an ordered mesoporous silica with a mixture of at least one selected from the group consisting of a nitrogen-containing carbon precursor, and a sulfur-containing carbon precursor, a metal precursor, and a solvent; drying and heat-treating the impregnated OMS; carbonizing the dried and heat-treated OMS to obtain a carbon-OMS composite; and removing the OMS from the carbon-OMS composite. A fuel cell may contain the OMC composite catalyst.
Owner:SAMSUNG ELECTRONICS CO LTD
Preparation method and application of macropore-mesoporous silicon dioxide hollow micro-sphere
InactiveCN101214965AImprove connectivityGood slow releaseOrganic active ingredientsSilicaMaterials preparationEmulsion
Disclosed are a preparation method and application of macroporous-mesoporous silicon dioxide hollow microsphere, which relate to the field of inorganic materials preparation and pesticide application. The process of materials preparation includes adding templates P123 in aqueous phase, after generating steady oil-water-oil dual emulsion, adding silica source tetraethyl ortho-silicate TEOS, producing hydrolysis under the effect of precipitant, generating silicon dioxide hollow microsphere, after filtering and drying, the product of the invention can be produced via calcining in 550 DEG C for 6 hours. The silicon dioxide hollow microsphere of the invention has macroporous structure and mesoporous structure. Through the mesoporous structure of the microsphere wall, realizing the communication between the hollow inside of the microshere and the outside. The invention also relates to the application in area of release carrier of the materials as avermectin drugs, the prepared release controlling agent has perfect long-acting slow release performance.
Owner:BEIJING UNIV OF CHEM TECH
Amino-modified mesoporous silica with dual drug-loading effects
InactiveCN104027814AIncrease load factorImprove bioavailabilityOrganic active ingredientsPharmaceutical non-active ingredientsMicrosphereUrsolic acid
The invention relates to the technical field of nano materials and specifically relates to amino-modified silica with dual drug-loading effects. According to the technical scheme, firstly, mesoporous silica nanoparticles are prepared by a template method; secondly, surface amino modification is carried out onto the mesoporous silica nanoparticles by 3-aminopropyltriethoxy silane; thirdly, ursolic acid is chemically coupled to the spherical mesoporous silica nanoparticles by amido bonds; and fourthly, the coupled nanoparticles are dispersed in DMF (dimethyl formamide) solution; a proper amount of ursolic acid is added, mixed and stirred; and finally vacuum drying is carried out to obtain the amino-modified silica with dual drug-loading effects. The mesoporous nano material with dual drug-loading effects prepared by the mesoporous silica disclosed by the invention is high in loading rate, can achieve controlled release effect for the loading drug ursolic acid, so that drug effect lasts for a long period time, and therefore, bioavailability of the ursolic acid is greatly improved.
Owner:FUZHOU UNIV
Preparation method of graphene-mesoporous silica aerogel
ActiveCN104826582ADiversification of preparation materialsSimple processOther chemical processesColloidal chemistry detailsMesoporous silicaSilica gel
The invention discloses a preparation method of graphene-mesoporous silica aerogel. The preparation method comprises graphite oxide synthesis, graphene oxide solution preparation, graphene-silica gel preparation, and graphene-mesoporous silica aerogel preparation. The preparation method combines excellent mesoporous structure characteristics of mesoporous silica and hydrophobicity of graphene and prepares the novel environmentally friendly adsorption material with high sewage heavy metal ion and organic pollutant selective adsorbability. Through mesoporous silica, graphene aggregation is inhibited and a high specific surface area is kept. Through graphene, mesoporous silica is uniformly dispersed and mesoporous silica stability is kept. The graphene-mesoporous silica aerogel has high composite material adsorption capability and can be easily separated from the solution after adsorption. The preparation method has simple processes. The graphene-mesoporous silica aerogel has characteristics of graphene and mesoporous silica.
Owner:SUIHUA UNIV
Multifunctional nuclear shell structure drug carrier material and preparation method thereof
InactiveCN101670107AIncrease temperatureHigh purityInorganic non-active ingredientsGranular deliveryMagnetite NanoparticlesRare earth
Owner:如皋市生产力促进中心
Mesoporous WO[3-x] visible-light-driven photocatalyst with oxygen vacancy as well as preparation method and application thereof
InactiveCN104874389AEasy to adjustEfficient use ofMetal/metal-oxides/metal-hydroxide catalystsOxygen vacancyMesoporous silica
The invention discloses a mesoporous WO[3-x] visible-light-driven photocatalyst with oxygen vacancy and a preparation method thereof. The method comprises the following steps: calcinating at a controlled temperature of 350-600 DEG C in air so as to obtain a mesoporous silica molecular sieve KIT-6 loaded with tungsten trioxide by taking mesoporous silica molecular sieve KIT-6 as a hard template and a silicotungstic acid or phosphotungstic acid hydrate as a tungsten trioxide precursor; then calcinating at a controlled temperature of 450-550 DEG C so as to obtain a mesoporous silica molecular sieve KIT-6 provided with oxygen vacancy and loaded with tungsten trioxide by utilizing H2 as a reducing agent; and finally, removing the mesoporous silica molecular sieve KIT-6 by use of a 10wt% HF aqueous solution, thereby obtaining the mesoporous WO[3-x] visible-light-driven photocatalyst with oxygen vacancy and relatively large specific surface area and pore diameter. The mesoporous WO[3-x] visible-light-driven photocatalyst with oxygen vacancy is capable of effectively utilizing lights to rapidly catalyze CO2 so as to generate methane, and is high in catalysis efficiency, simple in preparation process and needed equipment, environmentally friendly in preparation process and free from pollution.
![Mesoporous WO[3-x] visible-light-driven photocatalyst with oxygen vacancy as well as preparation method and application thereof](https://images-eureka-patsnap-com.libproxy1.nus.edu.sg/patent_img/371f3b02-68c7-41ef-a7cd-a4dfbefe86ed/1505051449421.PNG "Mesoporous WO[3-x] visible-light-driven photocatalyst with oxygen vacancy as well as preparation method and application thereof")
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Owner:SHANGHAI INST OF TECH
Process for producing ruthenium base catalyst for producing cyclohexene with benzene selective hydrogenation
InactiveCN101219391AAvoid uneven loadHigh catalytic efficiencyMolecular sieve catalystsHydrocarbon by hydrogenationCyclohexeneMesoporous silica
The invention pertains to chemical engineering field, in particular to a preparation method of a Ru-based catalyst, the catalyst has uniform load and high catalytic efficiency and is used for preparing cyclohexene from benzene through selectively hydrogenation reaction. A precursor of the catalyst is prepared through a cyclohexene / water component solvent system, and then reduced by a mixing gas of H2 or Ar to prepare the catalyst, and the catalyst consists of ruthenium, a dressing agent and a mesoporous silicon dioxide carrier L, amongst which the active component is ruthenium metal, the dressing agent is a metal oxide, and the precursor is selected from the nitrate or chloride of metal elements in IIA main group, VIII group and IVA main group in the element periodic table; ruthenium and the dressing agent are uniformly carried on the carrier L through the preparation method of the invention. When being used in preparing cyclohexene from benzene through selectively hydrogenation reaction, and compared with the catalyst used for the selectively hydrogenation of industrial benzene, the catalyst has the advantages that: lower the ruthenium consumption, higher selectively hydrogenation activity and selectivity for benzene.
Owner:FUDAN UNIV
Preparation method of graphene oxide and magnetic mesoporous silica composite material capable of adsorbing pollutants in water
InactiveCN103432996AAdjust the content of magnetic substancesLow costOther chemical processesAlkali metal oxides/hydroxidesAlkanePolyetherimide
The invention relates to a preparation method of a composite material prepared by graphene oxide and magnetic mesoporous silica microspheres through chemical bonding interaction. The magnetic particles are prepared by a hydrothermal process; after acid ultrasonic treatment, the magnetic particles are firstly coated with a thin silicon oxide shell layer by a sol-gel method; after that, long-chain alkane is taken as a pore-forming agent, the magnetic particles are copolymerized with tetraethyl orthosilicate (TEOS) in the sol-gel reaction, and then the pore-forming agent is removed by thermal etching, so that the magnetic mesoporous silica particles with certain hydroxyl on the surfaces can be obtained; polyetherimide (PEI) surface modification is carried out on the magnetic mesoporous silica particles, and strong interaction between PEI and silicon hydroxyl is utilized; finally, the carboxyl on ethylene dichloride (EDC) activated graphene oxide reacts with amino on the PEI, so that the graphene oxide magnetic mesoporous silica composite material can be obtained. The preparation method is simple, convenient and controllable and is favorable for amplification preparation. The composite material has large specific surface area and good magnetic controllability, and can adsorb humic acid and heavy metal ions Pb (II) at the same time by virtue of surface groups.
Owner:TONGJI UNIV
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