53results about How to "Stable mesoporous structure" patented technology

The present invention relates to the field of polymerization reaction, and discloses an ethylene polymerization method. Under the conditions of polymerization reaction, ethylene is subjected to a polymerization reaction in the presence of a catalyst, wherein the catalyst contains a spherical mesoporous composite material and a magnesium salt and / or titanium salt loaded on the spherical mesoporouscomposite material, and the spherical mesoporous composite material comprises a mesoporous molecular sieve material having a one-dimensional hollow spherical pore structure. The method uses a mesoporous structure-stabilized supported catalyst to obtain a polyethylene product which has a low bulk density and melt index and is not easily broken.

The invention relates to the field of mesoporous materials, and discloses a spherical small-size mesoporous composite material, a supported catalyst, and preparation methods of the spherical small-size mesoporous composite material and the supported catalyst. The spherical small-size mesoporous composite material contains a mesoporous molecular sieve material having a three-dimensional cubic cage-like pore channel structure, and has the average particle size of 15-30 [mu]m, the specific surface area of 200-650 m<2> / g, and the pore volume of 0.5-1.5 ml / g, wherein the pore sizes are distributedin a bimodal manner. According to the present invention, the spherical small-size mesoporous composite material has characteristics of stable mesoporous structure and uniform particle size distribution, and can provide the advantages of high strength and breaking resistance in the application as the catalyst carrier; and with the application of the supported polyethylene catalyst prepared from thespherical small-size mesoporous composite material in the catalysis of ethylene polymerization reactions, the high catalytic activity can be provided, and the polyethylene products with characteristics of low bulk density, low melt index and breaking resistance can be obtained.

The invention discloses a spherical mesoporous composite material, and a supported catalyst and a preparation method thereof, belonging to the field of mesoporous materials. The spherical mesoporous composite material has an average particle size of 20-30 micrometers, a specific surface area of 100-300 square meters / gram and a pore volume of 0.5-1.8 ml / gram; and the pore diameters of the spherical mesoporous composite material are in the form of bimodal distribution, and the most probable pore diameters corresponding to double peaks are 1-10 nm and 20-55 nm, respectively. The spherical mesoporous composite material provided by the invention has a stable mesoporous structure and uniform particle size distribution, and is high in strength and not prone to breakage as a catalyst; and the supported polyethylene catalyst prepared from the same has high catalytic activity when used for catalysis of ethylene polymerization, and polyethylene products which have low bulk density and a low melt index and are not prone to breakage are broken can be obtained.

The invention relates to the field of ethylene polymerization, and particularly relates to an ethylene polymerization method and polyethylene produced through the method. The ethylene polymerization method includes the step of performing a polymerization reaction to ethylene under polymerization reaction conditions in the presence of a catalyst. The catalyst contains a spherical double-mesoporous composite material and magnesium and / or titanium supported on the spherical double-mesoporous composite material; the spherical double-mesoporous composite material contains a mesoporous molecular sieve material having a hollow spherical structure, a mesoporous molecular sieve material having a three-dimensional cube-cage structure, and silica gel. The invention also discloses polyethylene which is produced through the method. The supported catalyst, when being applied to the ethylene polymerization reaction, is high in catalytic activity and can be used for producing high-performance polyethylene products.

The invention relates to the field of catalysts, and discloses a spherical composite carrier with a macroporous two-dimensional through a pore channel and a composite material containing a polyethylene catalyst, and preparation methods and application thereof. The carrier provided by the invention has an average particle diameter of 10 to 80 [mu]m, a specific surface area of 200 to 600 m2 / g, a pore volume of 0.1 to 2.5 mL / g, and pore size distribution in bimodal distribution, wherein two peaks respectively corresponds to a first most probable pore size of 1.2 to 4.5 nm and a second most probable pore size of 32 to 60 nm. The carrier provided by the invention has stable mesoporous structure, still can maintain an ordered mesoporous structure after loading active components, and has high activity when loading the polyethylene catalyst to catalyze ethylene for polymerization reaction.

The invention provides a preparation method of silica gel column supported meso-porous biochar solid sulfonic acid (SiO2-BC-SO3H) from wood fiber biomass, and a method using the silica gel column supported meso-porous biochar solid sulfonic acid to catalyze sucrose hydrolysis for preparing glucose. The preparation method of the SiO2-BC-SO3H comprises the following steps: biomass heat carbonization or concentrated sulfuric acid dehydration carbonization, boiling water swelling, acidic silica sol intercalation, heating (350 DEG C) dehydration in nitrogen, and concentrated sulfuric acid sulfonation. The silica gel content of the SiO2-BC-SO3H prepared through the steps is about 15 wt%, the sulfonic group density is 0.9 mmol / g or above, and the SiO2-BC-SO3H has an interlayer meso-porous structure. The SiO2-BC-SO3H has better catalysis activity and better reusability than non-porous biochar solid sulfonic acid in the catalysis of the sucrose hydrolysis reaction.

The invention relates to a copper-based antibacterial masterbatch and a preparation method thereof. The preparation method comprises the steps of mixing a soluble cuprous salt with water, adding mesoporous zirconium silicate to perform immersion adsorption to obtain a mixture; mixing and adding thiosulfate, metaphosphate and water into the obtained mixture, performing drying after the reaction, and obtaining cuprous ion-loaded zirconium silicate powder; mixing a carrier resin, a dispersing agent, a processing aid and the cuprous ion-loaded zirconium silicate powder and then performing extrusion pelleting, and obtaining the copper-based antibacterial masterbatch. A fiber obtained according to a conventional spinning process by the copper-based antibacterial masterbatch obtained through themethod has excellent antibacterial property and not only has good oxidation resistance, but also has excellent washing resistance, the preparation method is simple and convenient to operate, efficient, low in cost and lasting in effect and has a broad application prospect.