68results about How to "Ordered mesoporous structure" patented technology

The invention relates to a mesoporous silica resin. By using methyl phenyl siloxane (MPS) as a resin matrix, block polymer polydimethylsiloxane-polyoxyethylene (PDMS-PEO) as a template agent and tetrahydrofuran (THF) as a solvent, a solvent volatilization induced self-assembly method is carried out to prepare the mesoporous silica resin. The mesoporous silica resin has ordered and uniform mesoporous structure and large pore size; and the BET specific area, pore volume and average pore size are respectively 260-800m<2> / g, 0.15-0.50cm<3> / g and 5-50nm. In addition, the mesoporous silica resin has excellent high-temperature stability and frame stability, and still maintains the mesoporous structure after being subjected to 600 DEG C heat treatment for 1-3 hours, while the frame shrinkage after treatment is only 5-15%. The mesoporous silica resin material has wide application prospects in the fields of thermal protection systems, heat exchangers, catalysis, separation, light-weight structural materials and the like.

The invention relates to an alkylated gasoline catalyst. The alkylated gasoline catalyst is characterized in that Fe2O3-TiO2 of a mesoporous structure serves as a carrier, SO4<2-> serves as a main active component, and Pd serves as an auxiliary active component. The content of the Pd in the catalyst is 0.2wt% to 1.5wt% of the total weight of the catalyst, and the content of the SO4<2-> is 15wt% to 45wt% of the total weight of the catalyst. The invention further relates to a preparing method of the catalyst. According to the catalyst, a mixture of polyethylene glycol-2000 and F127 serves as a template agent, the catalyst carrier of the mesoporous structure is prepared with a supercritical technology, and meanwhile the active components are loaded on the catalyst carrier, so that the components of the catalyst are firmly combined into a whole, high catalytic activity is achieved, reaction stability is good, and the active components are not prone to being lost; the catalyst is prepared with the supercritical technology, the loading quantity of the active components on the carrier can be increased, and the active components are evenly distributed on the carrier.

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.