327results about How to "Lower the activation energy of the reaction" patented technology

The invention discloses a method for preparing 5-hydroxymethylfurfural by solid acid catalysis. The method comprises the following steps of taking lignin residue hydrolyzed by biomass as carrier raw material of solid acid; synthesizing the raw material into solid acid through a two-step way of carbonization and sulfonation, so that the waste material is recycled and the problem of disposal of pollutants is solved. In the dehydration reaction of lignin-based solid acid catalyzed fructose and glucose, the yield of 5-hydroxymethylfurfural can be respectively 84% and 68%; after the dehydration reaction, the lignin-based solid acid is easy to separate and reusable, the acid density of the solid acid can be reduced after being reused five times, and the yield of the 5-hydroxymethylfurfural is still higher than 75%. The method provided by the invention can be used for realizing emission without pollution, and is helpful for realizing environment-friendly producing process of 5-hydroxymethylfurfural.

The invention relates to a preparation method of repairing adhesive, in particular to a binder for repairing blade of a wind driven generator, belonging to the high polymer material field. The preparation method of double-component epoxy resin binder used for repairing blade is simple in operation and low in cost. The double-component epoxy resin binder for repairing blade which is made by the method of the invention has high tenacity, high shear strength, low heat and low shrink, thus being suitable for repairing and binding of large structural part; solidification is rapid, the binder can be rapidly solidified in 10-30 minutes at 5-25 DEG C and reach certain strength; and the binder is used for repairing defect of blade of wind driven generator.

The invention provides an application method of cold field plasma discharge assisted high energy ball milled powder and a plasma assisted high energy ball milling device using the cold field plasma discharge assisted high energy ball milling method. The method comprises the following steps: utilizing dielectric barrier discharge to generate plasmas, introducing a dielectric barrier discharge electrode bar into a high-speed vibrating ball-milling tank, on one hand, requiring a solid insulating medium on the outer layer of the electrode bar to simultaneously bear high-voltage discharge and mechanical shock failure of the grinding ball, and on the other hand, requiring the high-speed vibrating ball milling device to uniformly process the powder. The method is based on the ordinary ball milling technology; the processing efficiency and the effect of the ball mill can be greatly improved by the following steps: under a non-heat-balance discharge condition of the pressure that the discharge space pressure is set to be about 102-106 Pa, introducing the discharge plasmas to input another effective energy to the processed powder, promoting the powder to be processed to be subjected to combined action of the mechanical stress effect and the heat effect of the external electric field, and further accelerating refining of the powder and promoting the alloying progress.

A process for synthesizing silicon nitride powder by atmospheric pressure combustion includes such steps as proportionally mixing Si powder with catalyst, adding silicon nitride for activating and combustion reaction. Its main product is Si3N4.

The invention discloses a method for preparing ovalbumin with high foamability by microwave ultrasonic waves. The method comprises the following steps of accurately weighing 50g of ovalbumin and 50g of glucose respectively, dissolving into a 500mL of 2mmol/L NaCl solution, stirring slowly at room temperature for 20 minutes until dissolving completely, mixing uniformly, adjusting the pH to 8.0, putting into a 800mL high-pressure seal tank, and modifying the ovalbumin by controlling the microwave and ultrasonic wave time as well as power so as to improve the foamability. The ovalbumin prepared by the method is high in foamability which is 6-8 times of that of the untreated protein, is simple to operate, is low in cost, is reasonable in technology, and is short in production cycle.

The invention discloses a preparation method of a polycarboxylate superplasticizer with a high water reducing rate. The polycarboxylate superplasticizer is prepared through adopting the preparation method comprising the following steps: according to parts by mass, with an unsaturated polyether macromonomer and an unsaturated sulfonic acid micromonomer as dropwise adding components 1, an azo initiator, a peroxide initiator and an initiation accelerant as dropwise adding component 2, acrylic acid as a dropwise adding component 3 and a molecular weight modifier as a dropwise adding component 4, feeding the unsaturated polyether macromonomer and the unsaturated sulfonic acid micromonomer as well as deionized water into a reactor, stirring and increasing the temperature; when the temperature rises to a dropwise adding temperature, orderly dropwise adding the dropwise adding components 1-4 to the reactor at a constant speed for 3-5 hours; after the dropwise adding is finished, preserving heat for 0.5 hour to 1.5 hours to obtain a copolymerization product; and after the reaction is finished, adding an aqueous solution of sodium hydroxide for neutralization to obtain the polycarboxylate superplasticizer having the pH value in the range from 6 to 7. The preparation method disclosed by the invention is simple in reaction process, easy to control the reaction and low in production cost; the product obtained through the reaction is high in water-reducing rate and good in slump loss resistant and slow-release properties.

The invention discloses a method for collecting platinum group metal through microwave heating fusion. The method comprises the following steps that firstly, the temperature of a mixture containing aplatinum group metal raw material, a collector and additives is raised to 1,050 DEG C-1,200 DEG C under microwaves, the mixture is fused, and after fusing is completed, slag-liquid separation is carried out, and a slag phase and metal matte are obtained; wherein the collector comprises Ni3S2, and the additives are at least one of borax, sodium carbonate, sodium bicarbonate, sodium hydroxide, sodium peroxide and methylcellulose; and secondly, the metal matte is cooled and subjected to acid leaching treatment, and pickle liquor and platinum-containing leaching slag are obtained. According to themethod, efficient recovering of the platinum group metal in a waste catalyst containing the platinum group metal can be achieved at the relatively low fusing temperature, the content of the platinumgroup metal in the slag can be reduced through slag flotation, the collector is recovered in lixivium, and resources are saved.

The invention provides a method for preparing a photoinduced ultra hydrophilic automatically cleaning paint, comprising the following steps: (1) preparing titanium dioxide suspension by using titanium hydroxide; (2) preparing cerium-doped anatase titanium dioxide for subsequent use; (3) placing waterless ethanol, ammoniacal liquor, distilled water and ethyl orthosilicate which is added later into a reactor and magnetic stirring uniformly; (4) magnetic stirring the mixed liquor prepared in step (3) for more than 3 h in a constant temperature bath of 80 DEG C to obtain silica sol; (5)mixing the cerium-doped anatase titanium dioxide prepared in step (2), silica sol prepared in step (4) with waterless ethanol and stirring uniformly to obtain the photoinduced ultra hydrophilic automatically cleaning paint. The photoinduced ultra hydrophilic automatically cleaning paint has the advantages of simple use and convenient. The preparation method has the advantages of low energy consumption, saving heat treatment equipment, and low cost.

The invention provides a preparation method of active carbon. The preparation method comprises the following processes: a pre-oxidation process: performing pre-oxidation reaction on coal direct liquefaction asphalt to obtain pre-oxidized asphalt; a carbonization process: mixing the pre-oxidized asphalt with an activating agent, and performing carbonization reaction to obtain carbonized asphalt; and an activation process: performing heating activation on the carbonized asphalt to obtain active carbon. The coal direct liquefaction asphalt is subjected to pre-oxidation at first to ensure that small-molecular substances and macromolecular substances in the asphalt can be crosslinked with each other to form high-melting-point pre-oxidized asphalt, so that the coal direct liquefaction asphalt can be beneficially inhibited from melting in the carbonization process; and then, the pre-oxidized asphalt is subjected to the processes of carbonization and quick activation to prepare the active carbon with a relatively high specific surface area. The preparation method of the active carbon, provided by the invention, is more moderate in reaction condition and simpler in process flow.

The invention relates to a preparation method for anti-pilling, anti-ageing and normal-pressure cation dyeable polyester chips. The preparation method comprises procedures of primary esterification, transesterification, secondary esterification and polymerization, wherein three monomers are added in the transesterification procedure; a hindered amine light stabilizer, a hindered phenol antioxidant and hydroxyl silicon oil are added after the secondary esterification and before prepolymerization; and the polyester slices are precrystallized and dried before the spinning procedure. A fabric prepared from fibers spun by the polyester chips has a high anti-pilling property and high light fastness; the polyester fibers can be dyed with various bright colors due to the normal-pressure cation dyeable property; the unified requirement of high-grade spring and summer clothing at present on functionality and color is met; and the polyester fibers and wool can be dyed in the same bath and a good clothing effect of the fibers blended with the wool is achieved. The polyester fibers spun by the polyester chips are important supplement for the cation dyeable polyester fiber market at present and have wide market prospect.

The invention discloses a low-temperature plasma catalytic oxidation gas deodorization method. The method comprises the steps that exhaust gas enters the interior of a stainless steel reaction box from a gas inlet, and dust particles in the gas are intercepted through an activated carbon filter layer; then the gas enters a low-temperature plasma reaction chamber, after a power supply is switched on, multiple sets of reaction polar plates in the low-temperature plasma reaction chamber conduct high-voltage discharge to generate substances with a strong oxidizing property, macromolecules, producing malodor, in the gas are broken up into small molecules under the combined action of the substance with the strong oxidizing property and ultraviolet rays, and the small molecules are further oxidized to obtain inorganic molecules when the small molecules make contact with hydroxyl free radicals and oxygen atoms which are released by a catalytic oxidation reaction coating. According to the low-temperature plasma catalytic oxidation gas deodorization method, the low-temperature plasma technology is perfectly combined with the coating catalytic oxidation and ultraviolet oxidation technologies. According to the exhaust gas treated through the method, the removing rate of malodorous gas reaches over 98 percent, the removing rate of harmful microorganisms and bacteria reaches 98.9 percent, and the removing rate of the dust particles reaches 96.2%.

The invention relates to a method for preparing a high-comfortable composite functional polyester fiber, comprising the steps of: first esterification reaction section, secondary esterification reaction section, polymerization reaction process and spinning process, wherein aliphatic dicarboxylic acid and/or non-centrosymmetrically aromatic dicarboxylic acid is led into the first esterification reaction section to serve as a third monomer; flexible polyethylene glycol is led into the secondary esterification reaction section to serve as a fourth monomer; after finishing the esterification reactions, hindered amine light stabilizer and hindered phenolic antioxidant which are respectively prepared by taking acetic acid and ethylene glycol as solvents and hydroxyl silicone oil are added; after finishing pre-polymerization and before final polymerization of the polymerization reaction process, ultraviolet light absorber and antistatic agent are added; and before finishing the spinning process, polyester slices are performed pre-crystallization and drying; fibers with odd-shaped cross sections of three-leaf, cross, five-leaf and the like are prepared by melt spinning. The obtained polyester fiber is anti-ultraviolet light, antistatic, anti-pilling and has wet-absorbing quick-drying performance; and the fabric has high comfort.

The invention discloses a method for preparing solid calcium carbide. The method comprises steps as follows: (1) a carbon material and a calcium containing material are ground fine, so that carbon material powder and calcium containing material powder can be obtained respectively; (2) a mixture containing the carbon material powder, the calcium containing material powder and iron powder is mixed and wet-ground with a bonding agent, and a mixed material is obtained; (3) the mixed material is shaped to obtain a material pellet; (4) the material pellet is smelted at the temperature of 1,200-1,380 DEG C so as to obtain the solid calcium carbide. The solid calcium carbide can be effectively prepared with the method, and the production cost of the calcium carbide is obviously reduced.

The invention relates to a preparation method for a polyester fiber with a composite ultraviolet, static electricity and pilling resisting function. The preparation method comprises an esterification reaction procedure, a polymerization reaction procedure and a spinning procedure. The esterification reaction procedure comprises a primary esterification reaction stage and a secondary esterification reaction stage, flexible polyethylene glycol is introduced as a third monomer in the secondary esterification reaction stage, and after esterification is finished, a hindered amine light stabilizer,a hindered phenol anti-oxidant and hydroxyl silicone oil are added, wherein the hindered amine light stabilizer and the hindered phenol anti-oxidant are prepared by taking an acetic acid and ethyleneglycol as solvents. In the polymerization reaction procedure, after prepolymerization and before final polymerization, an ultraviolet absorbent and an antistatic agent are added. Before the spinning procedure, polyester is sliced for pre-crystallization and drying. The polyester fiber obtained by the method has the outstanding ultraviolet, static electricity and pilling resisting functions, and after being woven into knitted machine-made fabrics, is tested to have related technical indexes comprising the ultraviolet light transmittance of less than or equal to 5.0%, the pilling resistance of more than or equal to level 4 and the fiber volume specific resistance of less than or equal to 10*10<10> ohm.cm.

The invention provides a preparation method of a lithium iron phosphate battery material. The method comprises the steps that an iron source, a phosphate source and a molding agent are dissolved in deionized water after being mixed; a mixed solution is heated to 50-70 DEG C for stirring while heating, and H2O2 is added for complete oxidation; the oxidized solution is heated to 80-95 DEG C, and heat preservation is conducted for 1-10 h to obtain pink or white sediment; the pink or white sediment is subjected to pre-sintering, pre-sintering temperature is 450-650 DEG C, and pre-sintering time is1-8 h, so that a compound is obtained; the compound, a lithium source and a phosphate source supplement are mixed, a carbon source is added, and in a sand mill, wet grinding is conducted to obtain amaterial in required particle size; the material is subjected to sintering in an inert atmosphere or reductive atmosphere after being dried, sintering temperature is 700-850 DEG C, and sintering timeis 5-20 h, so that the high-compaction high-capacity LiFePO4/C material is obtained.

The invention discloses a method for preparing an apocynum spinnable fiber, which comprises the following processes: activating treatment on an original apocynum skin, soda boiling, washing and dehydration drying. The activating treatment process of the original apocynum skin is as follows: at room temperature, dipping the original apocynum skin in water, adding a reducing agent to the water, raising the temperature to be between 65 and 75 DEG C, adding an oxidant to the mixture, keeping the temperature for at least 80 minutes, and cooling the mixture to the room temperature. Compared with the prior art, the fiber preparation process of the invention has the advantages of simplifying the technical process, greatly reducing the process time, lowering the temperature of a treatment fluid, achieving the aim of saving energy and reducing consumption, and improving the fiber forming rate for the preparation of the apocynum fiber, along with good spinning performance and good handfeel and glossiness.

The invention discloses an organic waste gas purifying device and method. The method comprises the steps that dust particles in waste gas are gathered and separated; high-energy electrons generated by discharge of flowing light and pollution gas molecules collide, and chemical bonds in the molecules are broken and activated; ultraviolet light radiates a nanometer titanium catalyst to generate multiple free radicals and electron holes, and organic waste gas is oxidized and decomposed. By the adoption of needle array positive direct current flowing light discharge, energy density of corona discharge is increased, and more high-energy electrons with high activity can be generated to carry out activating decomposition on the organic waste gas molecules. By means of the synergistic effect of precious metal and the manganese dioxide catalyst, the reaction path is changed, the reaction activation energy is reduced, organic waste gas is promoted to be thoroughly oxidized into dioxide carbon and water, and intermediate products are reduced. Nanometer titanium dioxide generates photos and the electron holes under radiation of ultraviolet light, and then particles with high oxidability of hydroxyl, oxygen free radicals and the like are formed, and subjected to the photochemical oxidation reaction with pollutants.

The invention relates to a bimetallic-activity monatomic catalyst for a metal-air battery and a preparation method thereof and the metal-air battery, and belongs to the technical field of metal-air batteries. The preparation method of the bimetallic-activity monatomic catalyst for the metal-air battery comprises the following steps: 1) adding a cobalt-nickel bimetallic organic framework compound and dopamine hydrochloride or dopamine into an alkaline solution, stirring for 5-8 hours, and carrying out solid-liquid separation to obtain an MOF/PDA nano cubic block, wherein the alkaline solution is a tris buffer solution; and 2) carrying out annealing processing on the MOF/PDA nano cubic block prepared in the step 1) in an ammonia atmosphere to obtain the required product. The metal-air battery prepared from the catalyst prepared by the preparation method of the bimetallic-activity monatomic catalyst for the metal-air battery has better charge-discharge efficiency and longer cycle life than similar batteries.

The invention discloses nanocrystalline high-entropy alloy powder and a preparation method thereof, and relates to the technical field of powder metallurgy. The invention involves the nanocrystallinehigh-entropy alloy powder and the preparation method of the nanocrystalline high-entropy alloy powder, wherein the nanocrystalline high-entropy alloy powder comprises cobalt powder, chromium powder, iron powder, nickel powder, manganese powder, aluminum powder and titanium powder; and the metal element powder is directly mixed through a high-energy mechanical ball milling method by the preparationmethod of the nanocrystalline high-entropy alloy powder, and the nanocrystalline high-entropy alloy powder is prepared according to the specific steps. According to the nanocrystalline high-entropy alloy powder and the preparation method, through high-speed impact and grinding of grinding medium, reaction activation energy is reduced, powder activity is improved, solid diffusion among element powder is promoted, low-temperature chemical reaction is induced, and finally, the alloy powder with uniform composition and structure distribution is obtained, so that the problems of element volatilization and non-uniform components of the powdering after smelting is conducted are solved. The technical is simple in equipment, the procedure is simplified compared with a traditional method, the manufacturing cost is reduced, and the nanocrystalline high-entropy alloy powder powder the preparation method thereof are suitable for industrial large-scale preparation.