35results about How to "Has a catalytic effect" patented technology

The invention discloses a usage of magnesium used refractory material as well as the preparation and using method of a compound scale inhibitor, and is characterized in that the magnesium used refractory material which is the waste of industry is used for preparing the compound scale inhibitor. The method for preparing the compound scale inhibitor comprises the steps: 1) the magnesium used refractory material which is the waste of industry is sequentially treated by sorting, removing slag and chilled steel, grounding processing, magnetic separation and removal of iron as well as multilevel grounding, and then made into powder; 2) acid cleaning and dipping, the obtained powder is dipped in strong acid solution and treated by gravity-floatation; 3) drying and roasting; 4) additive is evenly mixed. When in use, the compound scale inhibitor is not only can be mixed with limestone/lime solid material to be prepared into solution for synchronous adding, but also can be prepared into solution to be directly added into a desulfurizing tower. The invention has simple processing, saves the resources and reduces the preparation cost of the compound scale inhibitor; the compound scale inhibitor can improve the desulfurization degree, the utilization rate of absorbent and the reliability of system operation, while the desulphurization system is prevented from scale formation.

A ZIF-9-based porou carbon/carbon fiber composite material and preparation method thereof belongs to the technical field of a preparation method of a metal nanoparticle doped porous carbon/carbon fiber conductive composite material, can solve the problems of poor conductivity and poor stability of the existing composite carbon material, wherein the carbon fiber of a carbon fiber fabric is taken asa growth substrate, and high-density arranged ZIF is grown on the growth substrate; 9, carbonize at high temperature in an inert gas atmosphere to generate porous carbon/carbon fib composite material, and that invention realizes a ZIF-9-based porous carbon and conductive substrate integrated conductive network structure, lithium sulfide batteries, sodium sulfide batteries, lithium-air batteries and fuel cells, electrocatalysis and other fields have a wide range of applications.

The invention discloses a preparation method of a nano porous metal film and a microelectrode sensor loaded with glucose oxidase (GOD) on the porous film for blood glucose monitoring, and relates to aprocessing technology of the porous metal film and a sensor technology. Metal and metal oxides of different proportions and thicknesses are subjected to magnetron co-sputtering on a polyimide substrate, treatment is conducted through deionized water or a weak acid solution to remove the metal oxides, metal layers which are each of a three-dimensional porous network structure and are interconnected are left to serves as a support layer and a conductive layer which are loaded with the GOD, the other side of the insulated substrate is coated with Ag/AgCl to serve as a reference-counter electrode, thus an electrochemical two-electrode system is constituted, then the substrate is coated with a high-molecular polymer to serve as a diffusion-limiting layer and an anti-interference hydrophilic layer, and then a glucose sensing microelectrode is constituted. The nano porous metal film is large in specific surface area, the active area of the electrode and the load amount of the GOD are effectively increased, permeability is good, conductivity is high, and physical damage to a microelectrode enzyme film sensing layer can be further prevented to a certain extent. The microelectrode sensor iswide in linear range and good in long-term stability.

The invention discloses a blast furnace smelting method capable of lowering coke ratio and increasing coal ratio. The blast furnace smelting method comprises the following steps: uniformly mixing vanadium-titanium sinter, vanadium-titanium pellets and coking ore processed by a sinter inhibitor to form an ore layer, wherein the vanadium-titanium sinter in the ore layer accounts for 60% to 80% of the total mass of iron furnace charge, and the vanadium-titanium pellets account for 20% to 40% of the total mass of the iron furnace charge; alternately distributing coke and the ore layer into a blastfurnace to form the alternate layer structure of the ore layer and the coke; mixing a combustion improver with pulverized coal to obtain a mixture; injecting the mixture into the blast furnace to becombusted; the combustion improver comprises 35% to 38% of calcium oxide, 25% to 35% of manganese dioxide, 22% to 25% of magnesium oxide and 8% to 12% of aluminum powder calculated in percentage by mass; the combustion improver accounts for 0.05 to 0.15% of the mass of coal calculated in percentage by mass; the technical indexes of the smelting process are that the coke ratio is 416 to 456 kg/tHM,the coking ratio is 115 to 150 kg/tHM, the coal ratio is 132 to 152kg/tHM, the blast temperature is 1150 to 1250 DEG C, and oxygen enrichment is greater than 2500m<3>/h; by adopting the blast furnacesmelting method, the coke ratio can be lowered, and the coal ratio and utilization coefficients of the blast furnace are increased.

The invention provides a preparation method of a perovskite catalyst and a product and an application thereof. The perovskite catalyst has a general formula LaFexCo1-xO3, wherein 0<x<1. The preparation comprises an iron metal precursor solution, a lanthanum metal precursor solution, a cobalt metal precursor solution, a palladium metal precursor solution and a citric acid solution. The method includes mixing the iron metal precursor solution, the lanthanum metal precursor solution, the cobalt metal precursor solution and the palladium metal precursor solution uniformly in a certain molar ratioand a certain mixing order; adding the citric acid solution to the uniformly mixed precursor solution; placing the mixture solution in an oven for drying to concentrate the mixture solution; keeping the temperature of the concentrated mixture at 700 DEG C for 4 hours in a muffle furnace to obtain the perovskite catalyst. The preparation method is simple and efficient, easy to operate and high in atomic utilization rate. The catalyst is applied to electrocatalysis to verify the catalytic effect.

The invention discloses an additive capable of simultaneous desulphurization and demercuration. The additive comprises sodium benzoate, ferric sulfate, adipic acid and ortho-phthalaldehyde. The invention further discloses a preparation method for the additive capable of simultaneous desulphurization and demercuration. The additive can realize simultaneous desulphurization and demercuration, has high desulphurization and demercuration efficiency and has the advantages of improvement of activity of limestone, capacity of preventing fouling and blocking of a WFGD system and reduction of system energy loss.

The invention discloses a treatment technology for an inner cavity surface of a cylinder cover. The treatment technology comprises processes as follows: cleaning the inner cavity surface of the cylinder cover to remove oil and dust; preheating the inner cavity surface of the cylinder cover to 70-90 DEG C in a far-infrared heating manner; performing spraying: spraying paint onto the inner cavity surface of the cylinder cover, wherein the thickness of the coating is in a range of 60-90 mu m; performing drying: continuously keeping the temperature of the inner cavity surface of the cylinder cover in a range of 70-90 DEG C and continuously drying the coating for 5-10 min in the far-infrared heating manner; performing sintering: performing high-temperature sintering on the coating of the inner cavity surface of the cylinder cover in a laser scanning heating manner at the temperature of 190-200 DEG C for 20-25 min to form a corrosion-resistant high-temperature-resistant ceramic film layer on an inner cavity of the cylinder cover. The treatment technology has the advantages that the coating is high-temperature-resistant and corrosion-resistant and has a catalytic combustion effect, so that the combustion efficiency of an engine is improved.

The invention discloses a method for synthesizing high-selectivity oxaziridine through a chemical enzyme process and belongs to the technical field of chemical synthesis. According to the method, aromatic aldehyde and fatty amine are used as reaction substrates, acetonitrile is used as a solvent and D-ethyl mandelate is used as a peroxy-acid precursor. The method comprises the following operationsteps: adding enzyme, an oxidizing agent, the reaction substrates, the peroxy-acid precursor and the solvent into a reaction container, stirring and reacting for 2 hours under the room-temperature condition to obtain the high-selectivity oxaziridine. The experiment proves that lipase has an obvious catalyzing effect of the reaction and can reach high cis-trans selectivity which is greater than 90%or more; no by-product is generated in the reaction process. Compared with the conventional chemical synthesis method, the method has the advantages of metal-free catalysis, green and environmental protection, low cost, high efficiency and high selectivity; a new method is provided for synthesizing oxaziridine compounds with cis-trans selectivity.

The invention relates to a method for producing molecular sieve by fly ash and a molecular sieve prepared thereby. The molecular sieve is prepared from the following raw materials in parts by weight:60-70 parts of fly ash, 20-30 parts of a nano negative ion powder, 8-12 parts of plant ash, 5-8 parts of caustic soda, 8-12 parts of water glass, 15-25 parts of a cold catalyst liquid and 30-60 partsof water. The fly ash is subjected to magnetic separation, roasting and cooling pretreatment, then mixed and stirred with other solid raw materials and liquid raw materials, next subjected to crystallization treatment by a thermal autoclave, and subjected to vacuum negative pressure drying and molding in a vacuum drying oven, and thus the molecular sieve is obtained. With the fly ash as the main raw material, the construction cost is low, the raw materials are sufficient, the solid waste fly ash resources is effectively utilized, secondary utilization of the resources is achieved, the environmental pollution caused by the accumulation of fly ash is also avoided, and he prepared molecular sieve has the inner crystal surface highly polarized and has good adsorption effect.

The invention discloses a method for improving glass feeling of the surface of diammonium phosphate. The method comprises the following steps that in a conventional method for producing diammonium phosphate by using phosphoric acid, boric acid which accounts for 0.05-0.20% by mass of the phosphoric acid in a neutralization tank is added into the neutralization tank, wherein the boric acid is a weak acid. The method disclosed by the invention is mainly used for improving performance such as transparency, luster, strength and the like of diammonium phosphate particles, and meanwhile, diammoniumphosphate can contain boron microelements, has fertilizer efficiency to many crops, can improve the crop quality and increase the yield, and also has insecticidal and catalyst effects.

The invention belongs to the technical field of lithium-sulfur battery preparation, and particularly relates to a preparation method of a lithium-sulfur battery composite positive electrode material. The preparation method comprises the following steps: dispersing g-C3N4 and carbon nanotubes in deionized water to obtain a mixed suspension; dissolving tin tetrachloride pentahydrate, ferric nitrate nonahydrate and cobalt nitrate hexahydrate in deionized water to obtain a mixed solution; stirring, mixing and reacting the mixed solution and the mixed turbid liquid to obtain a precipitate; drying and calcining the precipitate to obtain a precursor A; performing acid etching on the precursor A to obtain a precursor B; mixing the precursor B with sulfur, and carrying out ball milling to obtain mixed powder; and calcining the mixed powder to obtain the lithium-sulfur battery composite positive electrode material. Based on the defect of electrochemical performance of a single doped material of the lithium-sulfur battery, the SnO2 template and the g-C3N4 frame are creatively doped with the raw material of the lithium-sulfur battery at the same time, so that the battery performance is greatly improved.

The invention discloses a method for realizing asymmetric alpha-hydroxylation of pyrazolone compounds by phase-transfer catalyzed photosensitized molecular oxygen, and belongs to the technical field of synthesis of chiral alpha-hydroxypyrazolone compounds in organic synthesis. According to the technical scheme, the preparation method is characterized by comprising the following steps: uniformly stirring and mixing the pyrazolone compounds, a phase transfer catalyst and a photosensitizer in a solvent, then adding alkali, and reacting at -78-60 DEG C under the condition of visible light and air or oxygen to prepare the chiral alpha-hydroxy pyrazolone compound. The method is mild in reaction condition, simple to operate, good in substrate applicability and environmental friendliness, low in cost and suitable for large-scale production.

The invention relates to the technical field of polyurethane coatings, in particular to a moisture-curable one-component exposure-type polyurethane and a preparation method thereof. The moisture-curable one-component exposure-type polyurethane comprises fatty-group isocyanate, amine-terminated polyether, a latent curing agent, titanium dioxide, a filling material, an ultraviolet light absorber and an antioxidant. The preparation method comprises the following steps: dripping amine-terminated polyether subjected to vacuum dehydration into the fatty-group isocyanate, performing heat preservation when heating is carried out to obtain a prepolymer through polymerization, then sequentially adding dehydrated titanium dioxide, the filling material, the ultraviolet light absorber, the antioxidant and the latent curing agent into the prepolymer, uniformly stirring to form a finished product, and enabling the finished product to be in contact with and react with moisture in air to form a film. According to the method, the fatty-group isocyanate and the amine-terminated polyether are utilized, and the prepared polyurethane has the characteristics of compactness, high strength, high elasticity, wear resistance and corrosion resistance, is foamless, avoids yellowing, and can be applied to outdoor protective coatings. The fatty-group isocyanate and the latent curing agent have an excellent storage effect, and the storage period of the fatty-group isocyanate and the latent curing agent is longer than six months.

The invention relates to a synthesis method of biomass-based gamma-octadecalactone, and belongs to the technical field of perfume synthesis. The synthesis method specifically comprises the following steps: 1, mixing a solvent and oleic acid, adding a catalyst and an additive at the temperature of 0-5 DEG C, and conducting heating and refluxing at the temperature of 70-85 DEG C for 8-10 hours; and 2, after the reaction is finished, conducting filtering, extracting the filtrate with deionized water and diethyl ether, concentrating the obtained organic phase under reduced pressure, and conducting drying to obtain gamma-octadecalactone. In the synthesis process, an additive is also prepared, the additive takes the diatomite as a raw material, after roasting, the microporous structure of the diatomite is more uniform, peculiar smell generated in the reaction process can be better absorbed, the product quality is improved, on the one hand, the alkali solution can react with metal oxides in the diatomite, the content of metal oxide is reduced, the content of silicon dioxide is increased, and the yield of the product is improved.

The invention relates to the technical field of organic intermediates, and particularly discloses a p-nitroanisole synthesis method. The method includes the steps: S1 dissolving p-nitroanisole, and dissolving sodium hydroxide and methanol in an organic solvent to form a first mixed solution, wherein the molar ratio of sodium hydroxide to methanol is (1.3-2): 8; S2, performing preliminary reaction,wherein p-nitrochlorobenzene is added into the first mixed solution for 2-3 h, and a second mixed solution is formed, and the molar ratio of the p-nitrochlorobenzene to the addition amount of the methanol in S1 is 1: 8; S3, carrying out secondary reaction: a catalyst is added into the second mixed solution, a quaternary ammonium salt catalyst is selected as the catalyst for 4-8 h, and the molar ratio of the addition amount of the catalyst to the addition amount of the methanol in S1 is (0.003-0.006): 8; S4, carrying out post-treatment, and carrying out post-treatment to obtain p-nitroanisole.By adding the quaternary ammonium salt catalyst, the final yield of p-nitroanisole can be improved.