115results about How to "Moderate activity" patented technology

The invention provides an unsaturated hydrocarbon selective hydrogenation catalyst and a preparation method thereof. The catalyst uses alumina as a carrier and palladium as an active ingredient, and is characterized by comprising the following components by weight percentage: 0.1 to 1.0 percent of the palladium, 0.3 to 8.0 percent of a rare earth metal, 0.1 to 5.0 percent of alkaline-earth metal, and 0 to 3.0 percent of fluorine which can also be contained in the catalyst, based on the total weight of the catalyst. The catalyst carrier is theta or mix-crystal type Al2O3, and the priority is given to the theta crystal type. In the invention, the catalyst palladium is preferably distributed in a secondary outer layer of the catalyst. The catalyst has certain impurity resistance and coking resistance, is applicable to a section of selective hydrogenation process in full distillate cracked gasoline and unsaturated hydrocarbon selective hydrogenation process in other distillate oils.

The invention relates to an anti-fatigue cold mixed epoxy resin material, preparation method and application thereof, comprising component A and component B with mass ratio of 1:1-10:1, component A comprising fluid epoxy resin, active toughener, active diluents, coupling agent and defoamer; component B is any one of or a mixture of two or more than two of alicyclic amine or amino terminated polyether, cyanoethylamine, phenolic modified amine or hydroxyalkyl modified amine. Introduced epoxy terminated organosilicon block polyurethane prepolymer breaks the limitation that elongation at fracture of epoxy resin system based on “sea-island structure” is difficult to break through 100%. The invention is suitable for bridge deck pavement of long-span cable bearing bridge, waterproof bonding material or used for airport pavement, municipal viaduct, ramp and other occasions with high requirements for fatigue resistance of pavement material.

The invention relates to solar cell front sliver paste powder adaptable to high sheet resistance and shallow junction. The powder comprises, by weight percent, 50-75% of coarse sliver powder 2-5 micrometers in average particle size, 20-45% of fine sliver powder 0.5-2 micrometers in average particle size, 1-9% of glass powder, and 0.1-3% of additive. The components are added up to 100% by weight percent. Both the glass powder and the additive are in twin-peak particle size distribution. Compared with the prior art, the front sliver paste powder is optimized by powder gradation. The glass powder and the additive are proper in particle size. Voids between the coarse and fine sliver powders can be effectively filled with the glass powder and the additive. After sintering, silver islands are small and evenly distributed, can form fine orphic contacts and are fine in appearance. The glass powder has moderate activity and does not disrupt P-N junctions. The front sliver paste made from the powder is suitable for sintering on shallow-junction silicon cells.

The invention relates to a gasoline treatment method, which comprises: feeding a gasoline raw material into a fluidized reactor, contacting a mixed catalyst, and carrying out a desulfurization and aromatization reaction under a hydrogen present condition to obtain a desulfurization and aromatization product, wherein the mixed catalyst comprises an adsorption desulfurization catalyst and an olefinaromatization catalyst, the olefin aromatization catalyst comprises, by weight, 0.1-5.0 wt% of a passivation material, and the passivation material comprises at least an element selected from carbon,sulfur and nitrogen. With the method of the present invention, the sulfur content and the olefin content in gasoline can be reduced, and the octane number of gasoline can be increased while the high gasoline yield can be maintained.

The invention provides a placenta and umbilical cord cell protective solution. The protective solution is mainly prepared by dissolving a mycoplasma inhibitor and aminoglycoside antibiotics with an aqueous solution of MEM-alpha medium. 1 mL of the aqueous solution of MEM-alpha medium is respectively used for dissolving 10-30 mg of the mycoplasma inhibitor and 180-240 U of the aminoglycoside antibiotics. Concentration of the aqueous solution of MEM-alpha medium is 10-15 mg/mL. The protective solution provided by the invention not only can effectively kill or inhibit formation of mycoplasma and prevent placenta cell or umbilical cord cell infection, but also can provide a stable osmotic pressure environment for placenta or umbilical cord cells through addition of protective components. Then, human environment can be effectively simulated, and cell survival rate is raised. Meanwhile, nutrients can be provided for storing and transporting cells within a short period of time; immune performance of cells is enhanced; cell infection is prevented; cell viability is effectively improved; and cell transport time is prolonged.

The invention discloses a low-loss soft magnetic ferrite material which comprises main materials and auxiliary materials, wherein the main materials comprise the following components in parts by mole: 57 to 60 parts of ferric nitrate, 40 to 42 parts of manganese nitrate, 9-12 parts of zinc nitrate and 8 to 10 parts of nickel nitrate; by using the total weight of the main materials as a reference, the auxiliary materials comprise the following components: 300 to 400 ppm of neodymium oxide, 300 to 400 ppm of vanadium oxide, 400 to 600 ppm of niobium oxide, 300 to 700 ppm of boron oxide, 50 to 200 ppm of calcium carbonate, 20 to 100 ppm of lithium carbonate, 20 to 80 ppm of barium carbonate, 250 to 800 ppm of silica, 2000 to 2500 ppm of an adhesive, 3*10<6> to 5*10<6> ppm of an adsorbent, 300 to 500 ppm of an emulsifier. The invention also discloses a method for preparing the low-loss soft magnetic ferrite material; the magnetic core is low in loss and the saturation induction density is high.

The invention discloses soft-magnetic ferrite with high saturation magnetic induction. Raw materials of the soft-magnetic ferrite comprise first group of materials and second group of materials; the first group of materials comprise, in percent by substance amount, 52.0-53.5 mol% of ferric oxide, 38.0-42.0 mol% of manganese oxide, and 6.0-8.0 mol% of zinc oxide; by taking the total mass of the first group of materials as a reference, the second group of materials comprise 25-100 ppm of silicon oxide, 300-800 ppm of calcium oxide, 300-700 ppm of niobium oxide, 300-500 ppm of zirconium oxide, and 2500-3000 ppm of nickel oxide. The invention also discloses a preparation method of the above soft-magnetic ferrite with high saturation magnetic induction. The obtained soft-magnetic ferrite possesses high saturation magnetic induction, relatively high initial magnetic permeability and low magnetic core loss.

The invention discloses soft magnetic ferrite high in magnetic permeability and saturation induction density. The soft magnetic ferrite comprise main ingredients and subsidiary ingredients, wherein the main ingredients comprise, by Moore, 52.5-54% of ferric oxide, 36-37.5% of manganese oxide and 10-12.5% of zinc oxide; the total mass of the main ingredients serves as the basis, and the subsidiary ingredients comprise 100-300 ppm of indium oxide, 300-500 ppm of yttrium oxide, 400-800 ppm of magnesium oxide, 150-300 ppm of niobium oxide, 400-600 ppm of cobaltous oxide, 100-200 ppm of bismuth oxide, 200-500 ppm of vanadium oxide, 100-500 ppm of titanium dioxide, 20-80 ppm of rhenium oxide, 100-200 ppm of copper oxide, 50-150 ppm of zirconium oxide, 20-70 ppm of stannic oxide, 50-200 ppm of tungsten carbide and 500-800 ppm of silicon dioxide.

The invention discloses an acrylate emulsion, a preparation method and an application thereof, wherein the acrylate emulsion comprises a (meth) acrylate copolymer dispersion of an ethylenically unsaturated phosphate monomer copolymerization unit and an ethylenically unsaturated phosphate emulsifier. A latex paint prepared from the acrylate emulsion has excellent scrub resistance, and in addition,the acrylate emulsion has excellent ionic stability and freeze-thaw stability.

The invention relates to a damp fast solidification upper blade gum and preparing method thereof. The upper blade gum is composed of a component A and a component B. The component A is prepared from, by weight, 60-90 parts of hydroxyl-terminated polyurethane, 10-30 parts of vegetable oil polyols, 1-5 parts of chain extender, 0.1-5 parts of catalyst, 0.1-1 part of defoamer and 1-3 parts of latent curing agent. The component B includes isocyanate terminated polyurethane. Because both hydroxyl-terminated polyurethane and isocyanate terminated polyurethane are polymers, the damp fast solidification upper blade gum avoids the process that polyurethane adhesive aggregates from monomers, shortens the solidification time of polyurethane adhesive material, and improves the solidification speed. Besides, the activity of hydroxyl-terminated polyurethane and isocyanate terminated polyurethane is moderate, so that viscosity of a polyreaction system increases slowly in the preliminary stage, and the problems of very slow solidification speed in the later stage and shortened working life caused by quick increase of viscosity and fast speed in the preliminary solidification stage due to over large activity are avoided.

The invention discloses a total RNA extracting method of pancreatic tissue of acute pancreatic disease animal, which comprises the following steps: preparing lavage liquid; breeding film after degerming for 2h in the 95% O2 and 5% CO2; narcotizing the ill animal; plugging pipe into main pancreatic duct from the opening of duodenum; injecting fitful quantity of lavage liquid; cutting the pancreatic tissue; pruning in the soy parenzyme inhibitor under 4 deg. c; washing; placing in the TRlzol cracking liquid to homogenize at 4 deg. c; extracting the total RNA of pancreatic tissue according to the instruction of TRlzol cracking liquid agent box; detecting the density and the rate of OD260 and OD280 through spectrophotometric method; estimating the density; identifying the completeness integrity through 1% agarose gel electrophoresis.

The invention discloses a preparation method of a sandwich-structure carbon-base composite material. The preparation method comprises the following steps: (1) uniformly mixing chitosan and a zinc saltpore-forming agent, and carrying out carbonization treatment, so as to obtain a porous carbon nanosheet; and (2) soaking the porous carbon nanosheet obtained in the step (1) into a soluble nickel salt solution, taking out, drying, and carrying out CVD vapor deposition, so as to obtain the sandwich-structure carbon-base composite material. The preparation method has the beneficial effects that theraw materials are easily available, the repeatability is good, and the industrial production is easily realized. The invention discloses the sandwich-structure carbon-base composite material with good electrical conductivity. The invention further discloses application of the sandwich-structure carbon-base composite material as a negative electrode material in sodium-ion batteries. A sodium-ion battery produced from the carbon-base composite material prepared by virtue of the preparation method is high in specific capacity and good in rate capability and cycle performance.

The invention belongs to the field of polymer chemistry, and particularly relates to a high-hydroxyl acrylic emulsion with quick drying and long working life and a synthesis method thereof. The high-hydroxyl acrylic emulsion is prepared by polymerizing the following raw materials: 10 to 50 parts by mass of methyl methacrylate, 5 to 30 parts by mass of styrene, 0.5 to 5 parts by mass of acrylic acid, 2 to 20 parts by mass of n-butyl acrylate and 10 to 50 parts by mass of 7-hydroxyalkyl (meth)acrylate. The high-hydroxyl acrylic emulsion prepared by the method has very excellent appearance, particle size and stability, and water-based two-component coating prepared from the high-hydroxyl acrylic emulsion has relatively high gloss, relatively long working life while being high in drying speed,and extremely excellent in water resistance.

The invention discloses a preparation method for soft magnetic ferrite with high saturation magnetic induction strength and high magnetic permeability. The method comprises the following steps: adding ferrous chloride, manganese chloride, zinc chloride and nickel chloride into hydrochloric acid, after completion of dissolving, adding yttrium oxide and strontium oxide, and carrying out stirring until completion of dissolving so as to obtain a material A; dropwise adding a sodium hydroxide solution into the material A until a pH value is 9 to 11, carrying out standing and aging for 10 to 15 h, then adding triethanolamine and polyvinyl alcohol under stirring, then carrying out standing and hydrothermal reaction, and carrying out natural cooling, washing, filtering and drying so as to obtain a material B; and mixing zirconium oxide, titanium oxide, vanadium oxide, magnesium oxide, platinum oxide, molybdenum oxide, barium oxide, cerium oxide, tin oxide, indium oxide, borax, calcium carbonate, strontium carbonate and absolute ethanol, then carrying out ball milling, adding the material B and an adhesive and then carrying out uniform mixing, and carrying out pressing molding, microwave sintering and cooling so as to obtain the soft magnetic ferrite with high saturation, high magnetic induction intensity and high magnetic permeability.

The invention discloses a gas-phase catalyst for regenerating diesel through catalytic cracking of waste oil and a preparation method thereof. The catalyst comprises the following components by weight percent: 10-50% of Y-type molecular sieve, 0-20% of high-silicon ZSM-5 molecular sieve, 10-40% of activated aluminum oxide, 30-70% of supporter and 10-20% of adhesive. The gas-phase catalyst has the characteristics of moderate activity, high selectivity, good stability, strong metal pollution resistant capability and long service life, can be regenerated and meets the requirement of the diesel through catalytic cracking of waste oil.