102results about How to "Expand industrial applications" patented technology

The invention discloses a device and a method for phase detection based on a direct type micromechanical microwave power sensor. The device comprises an adjustable digital phase shifter (12), a power combiner (16), the direct type micromechanical microwave power sensor (19) and a digital multimeter (20), a reference microwave signal Vref is connected with a first input port (14) of the power combiner, a to-be-detected signal Vx is connected with an input port (11) of the adjustable digital phase shifter, an output port (13) of the adjustable digital phase shifter is connected with a second input port (15) of the power combiner, an output port (17) of the power combiner is connected with an input port (18) of the direct type micromechanical microwave power sensor, and back holes (8) on the direct type micromechanical microwave power sensor (19) are connected with the digital multimeter (20). The objective of accurate detection of microwave signal phase position is realized by utilizing the method of power after combining a measuring reference signal with the to-be-detected signal after phase shifting by the adjustable digital phase shifter.

The invention relates to a preparation method for a zirconium-contained rare-earth composite oxide. At a certain ratio, rare earth (cerium, yttrium, praseodymium or terbium) is mixed with zirconium to burden, or rare earth (cerium, yttrium, praseodymium or terbium) and zirconium are mixed with at least one of other metal ions (aluminum, barium, magnesium, strontium, titanium, manganese, ferrum, copper and hafnium) to burden. A magnesium bicarbonate or / and calcium bicarbonate aqueous solution prepared from raw materials of magnesium or / and calcium minerals or oxides and hydroxides by at least one working procedure of roasting, digesting, mixing size, carbonizing and the like can serve as a precipitator to carry out precipitation so as to obtain at least one of rare earth and zirconium composite carbonate and subcarbonate, and the at least one of rare earth and zirconium composite carbonate and subcarbonate is further roasted to obtain a zirconium-contained rare-earth composite oxide product. In the preparation method, cheap calcium or / and magnesium minerals or low-purity oxides and hydroxides can serve as initial raw materials to replace common chemical industry precipitators, such as ammonia water, ammonium bicarbonate, sodium carbonate, sodium hydroxide and the like, substances, such as magnesium, calcium, carbon dioxide and the like can be effectively circulated and utilized so as to greatly lower the production cost of the zirconium-contained rare-earth composite oxide, such as ceria-zirconia, yttrium zirconium, praseodymium zirconium, terbium zirconium and the like. In addition, in the production technology disclosed by the invention, no ammonia nitrogen wastewater, high-salinity wastewater and the like are generated, carbon dioxide greenhouse gas emission amount is reduced, the preparation technology is environmentally-friendly, and environment pollution is avoided.

The object of the present invention is to provide a method for manufacturing the hydrogen-added water containing a large amount of the microscopic bubbles and a manufacturing equipment for the same so as to expand the industrial applicability of the hydrogen-added water by containing the large amount of the microscopic bubbles. More specifically, a plurality of tubular structures, in which the diffusion chamber 5 having the double tubes is provided, and the porous element 6 having predetermined pore diameters in the diffusion chamber 5 are provided, are substantially linearly arranged in a longitudinal direction. The raw water and the hydrogen are supplied with one of the tubular structures, so as to form the mixture fluid of the raw water and the hydrogen by mixing the supplied raw water and hydrogen in the diffusion chamber 5. The mixture fluid is passed through the porous element 6 and diffused therein. The mixture fluid of the raw water and hydrogen passed through the porous elements 6 is supplied with the adjacent tubular structure under high pressure so as to mix it with the hydrogen in the diffusion chamber 5 of the adjacent tubular structure as well as to pass it through the porous element 6 and diffuse therein. Consequently, the hydrogen-added water containing a large amount of the microscopic bubbles of the hydrogen gas can be continuously produced.

The invention relates to the technical field of preparation of a pregabalin chiral intermediate with a bio-enzyme method, in particular to the preparation of the pregabalin chiral intermediate with the bio-enzyme method. According to a preparation method, a compound of isobutyl glutarate shown as a formula (I) is used as a raw material and used for generating a compound of (S)-3-(carbamoyl methyl)-5-methylcaproate shown as a formula (II) in an organic solvent under the action of bio-enzyme and ammonia, wherein R is preferentially direct-chain or side-chain alkyl of C1-C4.

Provided is a thermoplastic resin structure formed of a resin composition that comprises substantially (a) from 5 to 80% by volume of a polyolefin resin and (b) from 20 to 95% by volume of a polyphenylene sulfide resin, which is characterized in that, in morphology therein seen through electronicmicroscopy, the polyphenylene sulfide resin (b) forms a matrix phase (continuous phase) and the polyolefin resin (a) forms a disperse phase. The thermoplastic resin structure gives plastic containers, tubes and their Attached parts having good barrier properties, strength, durability and workability.

The object of the present invention is to provide a method for manufacturing hydrogen-added water containing a large amount of microscopic bubbles and manufacturing equipment for the same so as to expand the industrial applicability of hydrogen-added water by injecting a large amount of microscopic bubbles. More specifically, a plurality of tubular structures, in which the diffusion chamber (5), having double tubes, is provided, and a porous element (6) having predetermined pore diameters, in the diffusion chamber (5) is provided and are substantially linearly arranged in a longitudinal direction. The raw water and hydrogen are supplied with one of the tubular structures, so as to form the mixture of raw water and hydrogen by mixing supplied raw water and hydrogen in the diffusion chamber (5). The mixture is passed through the porous element (6) and diffused therein. The mixture fluid of raw water and hydrogen is then supplied to an adjacent tubular structure under high pressure.

The invention belongs to the technical field of natural polymer functional material preparation, and discloses a temperature and pH dual-affected xylan-based hydrogel as well as a manufacturing method and application thereof. The temperature and pH dual-affected xylan-based hydrogel is prepared through the following steps: dissolving xylan by using hot water, so that a xylan solution is obtained; adding N-isopropylacrylamide and acrylamide into the xylan solution, adding a crosslinking agent, feeding nitrogen for bubbling, adding a photoinitiator, uniformly mixing, cooling the obtained mixture to room temperature, putting the obtained mixture into an ultraviolet radiation reactor, carrying out ultraviolet irradiation at room temperature, carrying out closed placement and reaction at room temperature, and after the reaction is completed, washing the obtained product by using deionized water, so that an obtained solid is the temperature and pH dual-affected xylan-based hydrogel. The preparation process and method of the hydrogel disclosed by the invention are easy to operate, and the hydrogel has environmental friendliness; and the obtained temperature and pH dual-affected xylan-based hydrogel has biocompatibility, and has good sustained-release behavior on medications, and the release of medications in a simulated intestinal physiological fluid is up to 80%.

The invention discloses a method used for preparing iron-doped SBA-15 mesoporous molecular sieve under neutral conditions via one-step method, and belongs to the technical field of mesoporous molecular sieve synthesis. According to the method, Fenton reagent is added into an ethyl orthosilicate aqueous solution for hydrolysis, an obtained product is uniformly mixed with an organic template agent P123 aqueous solution, free radical reaction is induced by hydroxyl free radicals generated by Fenton reagent, the presence of a ferric salt is beneficial for realizing of charge matching effect and self-assembling between the organic template agent and an inorganic silicon source under neutral conditions, so that preparation of the Fe-SBA-15 mesoporous molecular sieve material is realized. According to the method, the Fe-SBA-15 mesoporous molecular sieve with excellent order degree is prepared via one-step method without adding inorganic strong acid, so that synthesis of metal-doped mesoporous materials under soda acidic or alkaline conditions or via complex post-treatment is avoided. The method is capable of providing industrialized production of iron-doped SBA-15 mesoporous molecular sieve with new ideas, providing widened industrialized applications of mesoporous molecular sieve materials with conditions, and possesses industrialized application value.

The invention relates to a method for synthesis of pyrrolo[1,2-a]quinoxaline derivatives and belongs to the technical field of chemical preparation. The method comprises the following steps that 2-halogenated arylamine and a 2-formyl azole compound as raw materials are weighed according to a mole ratio of 1-2: 1; the weighed raw materials are dissolved in an organic solvent; a transition metal salt, a ligand and an alkaline medium are added into the solution; the mixed solution undergo a reaction in an inert gas protective atmosphere at a temperature of 100-110 DEG C with stirring for 15-20h to produce the pyrrolo[1,2-a]quinoxaline derivative; and the pyrrolo[1,2-a]quinoxaline derivative is subjected to cooling, extraction, drying and reduced pressure distillation to form a pure product. The method for synthesis of the pyrrolo[1,2-a]quinoxaline derivatives has the advantages that 1, reaction conditions are mild, catalytic activity is high, a reaction yield is high and can reach to 90%, product selectivity is high, and a substrate expanding rang is wide; and 2, through a catalysis system, an expensive ligand is avoided, a reaction temperature is reduced, a cost is low, safety and convenience are obtained, and the pollution produced by the reaction system on the environment is low.

The invention provides a pervaporation hybridigation composite film, which consists of a separation layer and a support layer, wherein the separation layer is a mixture of hydrophilic NaA (naphthaleneacetic acid) and PVA (polyvinyl acetate). The pervaporation hybridigation composite film has the advantages that the separation performance is good, in addition, the mechanical intensity is high, the materialization stability is good, the preparation process is simple, the large-area preparation is easy, the further amplification is favorably realized, and the industrial production is finally realized. The invention also provides a preparation method of the composite film and application to the separation of mixtures of organic matter and water.

The invention discloses a quaternization xylan, preparation method via a semi-dry process and an application of the quaternization xylan. The preparation method disclosed by the invention comprises the following steps of: firstly, dissolving xylan in an alkaline solution and alkalinizing for 10-40 minutes at temperature of 20-40DEG C; adding the acquired mixture solution into a quaternization reagent, uniformly mixing, placing in a drying oven and reacting for 2-10 hours at temperature of 50-90DEG C, wherein the mass ratio of the quaternization reagent to the xylan is (1-8):1; and cooling the acquired product, washing the product by using lower alcohol, subsequently filtering and drying to acquire the quaternization xylan, wherein the lower alcohol is methyl alcohol, ethanol or propyl alcohol. The preparation method disclosed by the invention is simple in process, easily controllable in reaction conditions, good in operability and low in cost; and the prepared quaternization xylan has a degree of substitution of 0.10-0.60 and a molecular weight of 21730-32728g / mol, and can be applied to papermaking and pharmaceuticals industries as a papermaking additive and a DNA (Deoxyribonucleic Acid) vector.

The present invention discloses a graphene-like WS2 / nitrogen and phosphorus do-coped graphene electrochemical sodium storage composite electrode preparation method, which comprises: S1, dispersing graphene oxide in water, adding a quaternary phosphonium salt, uniformly mixing, sequentially adding ammonium thiotungstate and hydrazine, and uniformly mixing; and S2, carrying out a hydrothermal reaction on the mixed dispersion system obtained in the step S1, cooling, collecting the solid product through centrifugation, washing, drying, and carrying out a heat treatment in a nitrogen or argon atmosphere so as to prepare the graphene-like WS2 / nitrogen and phosphorus do-coped graphene composite nanometer material; and S3, adopting the composite nanometer material obtained in the step S2 as the electrochemical sodium storage active substance to prepare the composite electrode. According to the present invention, graphene oxide, ammonium thiotungstate and hydrazine are adopted as the raw materials, and the quaternary phosphonium salt assisted hydrothermal and heat treatment method and other methods are used to successfully prepare the graphene-like WS2 / nitrogen and phosphorus do-coped graphene electrochemical sodium storage composite electrode; and the method has advantages of simpleness, convenience, and easy industrial application expanding.

The invention discloses a nickel-based catalyst for dry reforming of methane and carbon dioxide and a preparation method and application thereof. The catalyst uses gamma-Al2O3 as a catalyst carrier, uses elementary nickel as an active component and uses yttrium oxide as a cooperative component. The preparation method includes the steps that the gamma-Al2O3 is calcined for pretreatment, the pretreated gamma-Al2O3 is evenly mixed with an aqueous solution of a nickel salt and a yttrium salt through an equivalent-volume impregnation method, and after impregnation is completed with light shielded at the room temperature, the catalyst is obtained through drying and calcining. The rare earth metal yttrium is added into the catalyst as the cooperative component, the yttrium oxide and the metal nickel form a 'cooperation-activity' site on the gamma-Al2O3, and thus catalytic activity and stability are improved; moreover, addition of the yttrium oxide facilitates dispersion of metal nickel particles on the gamma-Al2O3. The catalyst has good carbon-deposition resistance performance when applied to dry reforming reaction of methane and carbon dioxide.

The invention discloses a method for reducing corrosion of a strong oxidizing polymer degradation agent to an oil well tubular column. The method comprises the steps that firstly, the strong oxidizingpolymer degradation agent is dissolved in water, a strong oxidizing polymer degradation agent solution is obtained, and the mass percent of the degradation agent is 1%; secondly, sodium silicate andsodium tripolyphosphate are dissolved in water according to the mass ratio of (1-4.6): (0.5-2.3), stirring is carried out for 10 minutes at the normal temperature, and a (Si-P) compound corrosion inhibitor water solution with different proportions is obtained; and thirdly, the (Si-P) compound corrosion inhibitor water solution is used for reducing the corrosion of steel in the strong oxidizing polymer degradation agent solution, and the total mass percent of the sodium silicate and the sodium tripolyphosphate in the strong oxidizing polymer degradation agent solution is 0.15%-0.69%. Accordingto the method, the interatomic binding force and the adsorption action of the inorganic corrosion inhibitor and the steel interface are used, a protection film is formed on the surface of the oil welltubular column, a metal surface is effectively isolated from making contact with strong oxidant molecules, the corrosion of the strong oxidizing polymer degradation agent to the oil well tubular column is reduced, and wide market application prospects are achieved.

The invention relates to a synthesis method of a pyrrole[1,2-a]quinoxaline derivative, belonging to the technical field of chemical preparation. The synthesis method is characterized by comprising the following steps of: with 2-halogenated aromatic amine and 2-formylazoles as raw materials, dissolving the 2-formylazoles and the 2-halogenated aromatic amine in a ratio of amount of substances of (1-3):1 into an organic solvent, adding an alkaline medium, stirring the materials for 12-24 hours at 80-100 DEG C under inert gas shielding to react to obtain a pyrrole[1,2-a]quinoxaline derivative and cooling, extracting, drying and distilling the pyrrole[1,2-a]quinoxaline derivative at reduced pressure to obtain the pure product. The method has the beneficial effects that (1) the reaction conditions are more moderate, the catalytic activity is high, the reaction yield is above 90% and can reach 100% at most, the product selectivity is high and the substrate expansion range is wide; and (2) a catalytic system avoids use of compounds of transition metals, especially precious metals, is low in cost and is safe and convenient; and a reaction system produces slight pollution to the environments.

The invention belongs to the field of molecular biology and particularly relates to chitosanase Csncv and a mutant CsnB and application of the chitosanase Csncv. The mutant CsnB is obtained by mutating the chitosanase Csncv after codon optimization, an amino acid sequence and a nucleotide sequence of the optimized chitosanase Csncv are shown as SEQ ID NO.16-17, and an amino acid sequence and a nucleotide sequence of the mutant CsnB are shown as SEQ ID NO.1-14. By constructing an efficient-expression engineering strain of the CsnB, the thermal stability of the chitosanase is improved, and chitosan is hydrolyzed to obtain a chitosan oligosaccharide product containing chitobiose, chitotriose, chitotetraose, chitopentaose and chitohexaose; and the chitosanase Csncv and the mutant CsnB of the chitosanase Csncv can be applied to preparation of chitosan oligosaccharides and industries such as medicine, agriculture and food, and a foundation is laid for industrial application of the chitosanase.

The invention relates to the field of automotive tail gas purification, and discloses a road coating for purifying automotive tail gas and a preparation method of the coating. The preparation method comprises the following steps: (1) uniformly mixing nano titanium dioxide and diatomite powder; (2) carrying out laser welding on the mixed powder by adopting a laser scanning technology to obtain diatomite welded and supported nano titanium dioxide; and (3) uniformly mixing water, wollastonite powder, limestone, methyl cellulose, water-borne epoxy resin glue, bentonite, a dispersing agent, a defoaming agent and the diatomite welded and supported nano titanium dioxide to obtain the road coating for purifying the automotive tail gas. According to the method provided by the invention, the diatomite is loaded with nano titanium dioxide through glass powder assistance and laser welding, the process is green and pollution-free, the production efficiency is high, the loading is firmer, the nano titanium dioxide does not easily fall off, the further prepared road coating has strong adsorption capacity, a large amount of the tail gas can be adsorbed on the surfaces of catalyst particles, the degradation efficiency of the tail gas is improved, and the actual industrial application of a photocatalysis technology is broadened.

The invention provides a graphene modified foamed plaster sound-absorbing material, which is prepared based on an industrial byproduct plaster and has better strength, toughness and sound-absorbing characteristic and high additional value. Noise pollution becomes a main environment problem complained by urban residents and sound absorption is one of important measures for improving indoor sound quality and controlling noises. An existing traditional sound-absorbing material wastes a lot of raw materials and the requirements on low-carbon materials cannot be met. The graphene modified foamed plaster sound-absorbing material is prepared from the following raw material: the industrial byproduct plaster, a retarder, water, a foaming agent, a catalyst, a foam stabilizer and graphene oxide. Thesound-absorbing material is modified through the graphene so that the additional value of the material is improved; a high-value utilization technology is provided for the material and the graphene modified foamed plaster sound-absorbing material also has the characteristics that wastes are changed into valuable things and greenness and low carbon are realized, so that industrial application in the future is expanded.

The invention belongs to the field of organic chemistry and relates to a trifluoromethylation process for bromo-pyridine and derivatives thereof. The process disclosed by the invention comprises the following steps: by taking a bromo-pyridine compound with a formula a structure as a raw material, performing trifluoromethylation under the action of a Maben reagent fluoro-S-( trifluoromethyl)-dibenzothiophene salt having a formula c structure, thereby obtaining the tirfluoromethylpyridine compound with a formula b structure. The structural formula is as shown in the specification. In the formula, X- is Bronst conjugate base, R is H or -CN or halogen or C1-C6 alkyl or C1-C6 alkoxy or -OH or -R1OH or COR2 or -CO2R3 or -CONR4 or -NR5R6; R1 is C1-C6 akyl; R2, R3 and R4 are identically or differently H or C1-C6 alkyl; and the R5 and R6 are identically or differently H or O or C1-C6 alkyl or C1-C6 alkoxy.

The invention discloses a method for preparing a super-oleophobic surface by taking kaolin as a raw material. The method comprises the following steps: I, dissolving sodium hydroxide and perfluoro caprylic acid into a solvent to obtain a mixed solution, then, adding kaolin powder into the mixed solution, and ultrasonically dispersing the newly obtained mixed solution at the room temperature; II, carrying out oil-bath heating on the ultrasonically-dispersed mixed solution under a stirring condition, and then, preserving the temperature of the mixed solution to obtain a turbid liquid; and III, uniformly coating a substrate with the turbid liquid, then, drying the substrate which is coated with the turbid liquid under the room temperature condition, putting the dried substrate in a drying oven to dry, and finally wiping the dried substrate surface, thereby obtaining the super-oleophobic surface on the substrate. According to the method, clay mineral kaolin powder with low cost is directly used as a base raw material, so that the super-oleophobic surface can be obtained by virtue of simple operation steps and gentle reaction conditions; and the super-oleophobic surface has the advantage of being not limited by the substrate, and the industrial application of kaolin is expanded.

The invention aims to provide a semi-coke mixed burning method. The method is mainly used to provide synthetic gas for coal indirect liquefaction. The method comprises the following steps: mixing semi-coke with blast-injection coal in proportion, processing through a crusher and a screener to obtain appropriate coal granules, adding the coal granules to a vaporizing furnace at 1100DEG C, and reacting to generate the synthetic gas for coal indirect liquefaction. The method greatly reduces the requirements of coal indirect liquefaction on the kind of coal, improves the applicability and economy of a coal indirect liquefaction technology, further develops the industrial application of semi-coke, and improves the industrialization level.

The invention discloses a composite treatment method of a regenerated deformed aluminum alloy melt. The composite treatment method mainly comprises the following steps of carrying out composite treatment on a 6xxx-series regenerated aluminum alloy melt by using Mg, Sr and a C-containing refiner to change the form and distribution of a second phase of the alloy, so that a needle-like impurity phaseis converted into a Chinese character shape, and an eutectic structure is uniformly distributed; and meanwhile, grains are refined, and the alloy solidification mode is changed. After the composite treatment, the ingot casting heat crack sensitivity of the regenerated deformed aluminum alloy is obviously reduced, the reduction rate is up to 32%, the comprehensive mechanical property is also obviously improved, the tensile strength is maximally improved by 35%, and the hardness is maximally improved by 45%.

The invention discloses a WS2 nanotile and graphene composite nanomaterial and a preparation method thereof. The composite nanomaterial is formed by compounding graphene and a WS2 nanotile with few layers and graphene, wherein the WS2 nanotile has 2-6 layers and averagely has 3-5 layers, and the mass ratio of the WS2 nanotile to the graphene ranges from 1 to 1-1 to 4. The preparation method comprises the following steps of firstly, ultrasonically dispersing graphene oxide into deionized water; then, adding a gemini surfactant, and sufficiently stirring; next, sequentially adding L-cysteine and ammonium thiotungstate, and sufficiently stirring to dissolve L-cysteine and ammonium thiotungstate; and transferring the mixed dispersion system into a hydrothermal reaction kettle to carry out hydrothermal reaction at the temperature of 230-250 DEG C for 20-24h, then, naturally cooling to the room temperature, centrifuging to collect a solid product, sufficiently washing with deionized water, drying, and finally, carrying out heat treatment to obtain the WS2 nanotile and graphene composite nanomaterial. The method disclosed by the invention is simple, convenient and free of consuming organic solvents.

The invention belongs to the field of high polymer materials, and in particular relates to a thermal conducting polymer composite material and a preparation method thereof. The thermal conducting polymer composite material provided by the invention is prepared from a polymer 1, a polymer 2 and thermal conductive filler and is prepared by means of melt blending and a micro injection molding method;the polymer 2 in the composite material has a microfiber structure; the ratio of the polymer 1, the polymer 2 and the thermal conductive filler is as follows: 80-95 parts by weight of the polymer 1,5-20 parts by weight of the polymer 2 and 1-10 parts by weight of the thermal conductive filler; the melting point of the polymer 1 is less than that of the polymer 2; the melt index of the polymer 1is less than that of the polymer 2; the thermal conductive filler is selectively distributed in the polymer 2 or on the surface thereof. The composite material obtained by the method has good thermalconductivity and mechanical properties at the same time.

The invention discloses a cathode interface modification method for improving the performance of an organic electroluminescent device. Solution steam processing is carried out on a light-emitting layer of an organic electroluminescent device at a room temperature, wherein the steam is generated by a solvent containing a polar group. In addition, the invention also discloses a preparation method ofan organic electroluminescent device. According to the invention, the electron injection barrier is reduced by the solution steam processing; the electron current density is improved; the electron and hole balancing in the organic light-emitting layer is realized; and thus the device performance is improved. The cathode interface modification method and the preparation method of an organic electroluminescent device have characteristics of high solution processibility, simple process, high feasibility, low cost, and high applicability.

The invention relates to the technical field of heterocyclic chemistry, specifically to the technical field of nitrogen-oxygen heterocyclic chemistry. Specifically speaking, the invention discloses a novel synthetic process for rivaroxaban. According to the process, the R group of a compound with a structure as shown in a formula (I) is removed so as to obtain a compound with a structure as shown in a formula (II) or an acid salt thereof, and the compound with the structure as shown in the formula (II) or the acid salt thereof reacts with a compound with a structure as shown in a formula (III) under the action of alkali so as to prepare rivaroxaban, wherein the formulas are described in the specification, and R in the formulas is a C1-20 aliphatic / aromatic hydrocarbon group.

The invention relates to the technical field of heterocyclic chemistry, particularly relates to the technical field of the heterocyclic chemistry containing 1,3-diazine cyclic, specifically relates to an intermediate for preparing rosuvastatin and a preparation method and application. An intermediate compound for preparing the rosuvastatin has the following structure as shown in the formula (A), wherein X is halogen, R1 is hydrogen or trimethyl silane, R2 is iodine methyl or a group with the structure in the following formula.

The invention relates to the chemical technical field of carbocyclic rings, in particular to a preparation method and application of an aromatic cyclopropyl butanone compound. The preparation method comprises the following steps of: making a compound shown as a formula (a) react with a magnesium elementary substance to obtain a Grignard reagent; undergoing a Grignard reaction on a compound shown as a formula (b) to obtain an aromatic cyclopropyl butanone compound, i.e., a compound shown as a formula (c), wherein the aromatic cyclopropyl butanone compound can be used for preparing a tetrahydrothienopyridine derivative; and when R1 is a two-potential fluorine atom, the compound shown as the formula (c) is an important intermediate for preparing Prasugrel. The structural formula of the related compound is shown in the specifications, wherein R1 refers to F, Cl, alkyl with 1-4 carbon atoms or alkoxy with 1-4 carbon atoms; R2 and R3 refer to alkyls; and X refers to Cl or Br.

The invention discloses a difructose anhydride hydrolase mutant E160F with improved thermal stability, and belongs to the technical field of enzyme engineering. According to the invention, difructose anhydride hydrolase (AcDFA-IIIase) derived from a microorganism Arthrobacter chloropherolicus A6 is used as a parent enzyme, the 160th glutamic acid Glu of the amino acid sequence of the difructose anhydride hydrolase is replaced by phenylalanine Phe by using a gene mutation technology to obtain a single-point mutant enzyme E160F, and the single-point mutant enzyme E160F can be used for catalyzing the difructose anhydride hydrolase under the optimal catalysis condition (pH 6.5, pH 7). The thermal stability of the mutant is improved from the half-life period of 2 hours at 55 DEG C to the enzyme activity basically unchanged at 55 DEG C, and the half-life period at 65 DEG C is improved from 30 minutes to 8 hours. The mutant E160F provides a favorable guarantee for further industrial application of the difructose anhydride hydrolase, and is especially suitable for long-time immobilized catalytic production.