72results about How to "With industrial applications" patented technology

The invention discloses a method for preparing WC-Co nano composite powder by in situ reduction and carbonization, which comprises the following steps: 1, preparing a mixed solution containing W, Co and C or mixed solution containing W, Co, C and inhibitor raw materials or an emulsion; 2, carrying out hydrothermal reaction; arranging the mixed solution obtained in step 1 in a hydrothermal reaction kettle, sealing, heating to 120-200 DEG C, preserving the temperature for 2-15h, cooling to the room temperature, and then filtering, cleaning and drying the reactants to obtain presoma powder; 3, reducing and carbonizing; and 4, directly arranging the presoma powder obtained in step 2 in a vacuum furnace or protective atmosphere furnace, and heating to 800-1100 DEG C to carry out reduction and carbonization reaction with the reaction time of 0.5-6h to obtain WC-Co and WC-Co nano composite powder containing an inhibitor. The raw material used in the method is cheap, the process is simple, the product is pure, particles are fine and uniform, the defects of long cycle, nonuniform mixing and the like of a ball-milling mixed material process can be avoided, the preparation cycle is shortened, the production cost is reduced, and the method has the advantage of industrial application.

The invention discloses a preparation method for a high-entropy alloy. A pure element or master alloy powder mixture is adopted as a raw material and is directly put into discharge plasma sintering (SPS) equipment, a vacuum hot pressing reaction is conducted, and the bulk high-entropy alloy is fast sintered and synthesized; and the integration of the densification of the alloy bulk material and the solid solution phase of the high-entropy alloy is achieved through the precise control over the SPS sintering parameters, and the dense high-entropy alloy bulk material is obtained at a time. The high-entropy alloy prepared through the technology is high in densification, uniform in structure and excellent in mechanical performance. The preparation method has the outstanding beneficial effects that the equipment and process are simple, the efficient and fast functions are achieved, the production cost is low, and the reliability is high and is suitable for the industrial production of the high-entropy alloy.

The invention discloses a preparation method and application of a magnetic modified sodium alginate flocculating agent. The preparation method comprises the following steps: grafting partially oxidized sodium alginate by using thiosemicarbazide, and performing reaction with Fe3O4 nanoparticles of which the surfaces are modified by amino groups to obtain a magnetic thiosemicarbazide-sodium alginate flocculating agent with a special effect. The method mainly comprises the following three reaction processes of (1) reacting the partially oxidized sodium alginate with the thiosemicarbazide to generate a Schiff base, and reacting the Schiff base with NaBH4 to generate stable amine; (2) preparing the magnetic Fe3O4 nanoparticles by using a co-precipitation method, and performing surface modification on the Fe3O4 nanoparticles by using gamma-aminopropyltriethoxysilane (KH-550); (3) reacting thiosemicarbazide-sodium alginate with the modified Fe3O4 nanoparticles to obtain the magnetic sodium alginate flocculating agent (ST-Fe) at room temperature in the presence of a catalyst EDC / NHS. The obtained product can be applied to sewage treatment and precious metal recovery, has the advantages of efficient adsorption, high sedimentation speed, simplicity in separation, low cost, biodegradability, no secondary pollution and the like, and has wide industrial application prospect.

The invention discloses a compound inducer for improving the capacity of a microorganism strain for producing a laccase, which comprises bagasse, ethanol and a bluestone liquid; and a comparison research carried out on a whiterot fungi strain XG8 by utilizing the compound inducer shows the laccase capacity in a fermentation liquid is improved by 10 times than that of the strain not added with thecompound inducer. The inducer of the invention is quite suitable for being applied to the large-scale production of industrialized laccases.

The invention belongs to the field of membrane separation, and particularly relates to a cyclodextrin modified polyamide film composite membrane, and a preparation method and an application thereof. The preparation method of the composite membrane comprises the following steps: soaking a polymer base membrane in an aqueous polyamine solution, and taking out the soaked polymer base membrane to obtain a treated polymer base membrane; enabling the treated polymer base membrane to be in contact with a polybasic acyl chloride solution to make polyamine and polybasic acyl chloride subjected to interfacial polymerization reaction to obtain a polyamide composite membrane; and transferring the composite membrane into an aqueous cyclodextrin solution or an aqueous aminated cyclodextrin solution forsoaking to make the residual polyacyl chloride solution on the surface of the composite membrane and the aqueous cyclodextrin solution or the aqueous aminated cyclodextrin solution subjected to a secondary interfacial polymerization reaction, and washing to obtain the cyclodextrin modified polyamide composite membrane. The method is simple in process, the prepared membrane has good hydrophilicity,and when the membrane is applied to alcohol / water separation, efficient separation performance is shown.

The present invention is the preparation process of 3, 3', 5, 5'-tetralkyl-4, 4'-diphenol, and features that material 2, 6-dialkyl phenol is first oxidized and coupled with salt oxidant to produce 3, 3', 5, 5'-tetralkyl-4, 4'-biphenyl diquinone, and 3, 3', 5, 5'-tetralkyl-4, 4'-biphenyl diquinone is then reduced with cheap efficient inorganic reductant to obtain 3, 3', 5, 5'-tetralkyl-4, 4'-diphenol. The preparation process of the present invention is novel, mild in reaction condition, less in side product, simple and low in cost, has no need of blowing in oxygen or pressurizing air and special reaction apparatus, and has industrial application foreground.

The invention provides a preparation method for polysubstituted indole derivatives. The preparation method comprises employing alkynyl-terminated hydrocarbon, a halogenated aniline derivative and a disulfide as initial raw materials, using an amino acid as an additive and a copper salt as a catalyst, performing a coupling-tandem one-pot reaction in an organic solvent under an alkali-added condition, so as to obtain the corresponding polysubstituted indole derivative, wherein the catalyst is CuX, and X is iodine or bromine. According to the technical scheme, the method for synthesizing the polysubstituted indole derivatives through one-pot process is developed on the basis of a method for synthesizing 2-substituted indole through copper catalysis. The method does not employ an expensive palladium catalyst easily polluting environment. The method enables alkynyl-terminated hydrocarbon, one halogenated aniline derivative and one disulfide to have the coupling-tandem one-pot reaction under a relatively mild condition, is simple in technology and strong in operationality, and possesses industrial application prospect.

The invention belongs to the technical field of organic chemical industry, and in particular, relates to a preparation method of a polysubstituted benzofuran derivative. The method is a coupling-tandem one-pot method, terminal alkyne, a halogenated phenol derivative and disulfide or diselenide undergo a reaction, amino acid is used as an additive, a copper salt is used as a catalyst, and under a condition of adding an alkali and in an organic solvent, a reaction is carried out to prepare the polysubstituted benzofuran derivative. An expensive palladium catalyst easily polluting the environment is not adopted, the reaction conditions are relatively mild, the process is simple, the operation is high, and the method has the prospect of industrial application.

The invention discloses a palladium-based dual functional film and its preparation method. The palladium-based dual functional film contains a palladium film or palladium alloy film deposited on the surface of porous ceramics and is characterized in that pore channels of the porous ceramics are loaded with a methanation catalyst. The preparation method comprises steps of: loading the methanation catalyst into the pore channels of the porous ceramics by an immersion method and preparing the palladium or palladium alloy film on the surface of the porous ceramics by a chemical plating or chemical plating and electroplating coupling method. According to the palladium-based dual functional film, the methanation catalyst is loaded in the pore channels of the palladium film or palladium alloy film porous carrier so as to realize the coupling of film separation and carbon monoxide catalytic methanation. When the film is used for hydrogen separation and purification, trace carbon monoxide and carbon dioxide leaked from defects of the film can undergo catalytic methanation, thus satisfying special hydrogen requirements. The preparation technology of the palladium-based dual functional film provided by the invention is mature, simple and easy to operate, and can be suitable for industrial application.

The invention relates to a pitch-row gauge capable of being read and belongs to the technical field of gauges. The pitch-row gauge capable of being read comprises a gauge body and a calibration piece. The gauge body comprises a gauge main body, a dial gauge support is arranged above the gauge main body, and a dial gauge is connected with the dial gauge support through a fastening clamp; a spring cutting sleeve is further arranged between the fastening clamp and the dial gauge support; a dial gauge gauging head of the dial gauge penetrates through the dial gauge support and is exposed on the gauge main body; the pitch-row gauge further comprises the independent calibration piece and a boss is arranged at the left end of the calibration piece; a circular hole is formed in the boss and a large circular hole is formed in the other side of the boss. The pitch-row gauge capable of being read is simple in structure and capable of overcoming the shortage that an existing gauge can only give a qualitative conclusion. According to the pitch-row gauge capable of being read, the existing dial gauge is adopted by the gauging method, the popularizing rate is high, and the pitch-row gauge capable of being read has the prospect of industrialized application.

The invention relates to a power assisting bracket of a bench pressing machine. Specifically, the power assisting bracket of the bench pressing frame is simple in structure, can help a user start the barbell bench pressing action through power assisting, and further comprises the following parts: a tubular fixing part, a spring, a cover and a movable part, wherein before the barbell bench pressing action is started, a barbell bar is placed on a supporting plate, and the spring is compressed, besides, when the barbell bench pressing action is started, the power assisting bracket of the bench pressing frame deviates from the position right above the chest of the user, so that the user can start the barbell bench pressing action individually with power assisting of the spring.

The invention provides a method of adopting comprehensive technology to improve smoking quality of reconstituted tobacco. The method includes following steps: (1), combining feruloyl esterase with white rot fungus lignin degrading enzyme laccase for fermentation; (2), combining tannic acid with tartaric acid for precipitation; (3), concentrating: vacuum concentrating extract obtain in the step (2) at temperature of 75-85 DEG C until solid content is 40% to obtain reconstituted tobacco concentrate with smoking quality improved; (4), preparing a substrate: using a dryer to dry residue of reconstituted tobacco after extraction at 100-120 DEG C, inactivating enzyme, manufacturing and adjusting to be a tobacco filling material with certain water content, and forming tobacco fiber into a sheet to make the tobacco substrate; (5), rolling: spraying the concentrate obtain in the step (3) onto the tobacco substrate obtained in the step (4), and rolling to obtain the reconstituted tobacco. By the method, irritation of the reconstituted tobacco can be lowered, offensive odor can be reduced, smoke is gentle, and the smoking quality of the reconstituted tobacco is improved.

The invention provides a coating composition comprising zein, pectin and a plasticizer. The invention also provides a coated drug preparation and a preparation method thereof. The coating composition provided by the invention contains natural polymer zein and pectin, is good in stability and water resistance, and can effectively realize controlled release of a drug. The coated drug preparation provided by the invention adopts the coating composition for coating film coating, so that the controlled release of the drug at different time and different parts can be realized. The preparation method of the coated drug preparation provided by the invention is simple, is good in film forming property, and has a great potential for industrial application.

The invention provides a preparation method of sheepskin collagen oligopeptide. The preparation method comprises the steps of with fresh sheepskin as a raw material, performing soaking with alkaline electrolysed water, performing enzymolysis treatment, performing anion-cation exchange resin adsorption, performing filtration, performing concentration, performing drying and the like so that the sheepskin collagen oligopeptide of which the molecular weight is wholly smaller than 1000Da is obtained. According to the preparation method, acid or alkali is not used, though anion-cation exchange resinadsorption, the pH of the oligopeptide is adjusted, and skin absorption is facilitated. In addition, the method is low in cost and environmentally-friendly, the oligopeptide molecular weight is small, and the preparation method has industrialization application prospects.

The invention provides a method for improving fragrance quality of reconstituted tobacco by biotechnology. The method comprises the following steps: (1) strain activation: slant culture medium is inoculated with Enterobacter mori VL4-3 to obtain a slant culture, then a seed culture medium is inoculated with the slant culture, and transformation is conducted to obtain a seed culture solution; (2) complex biotransformation pretreatment: in the reconstituted tobacco extraction process, a reconstituted tobacco aqueous solution is inoculated with the seed culture solution, a compound enzyme of clostridium butylicum feruloyl esterase, lignin peroxidase (Lip) and manganese peroxidase (MnP) is added, uniform stirring and mixing are performed, and fermentation is conducted to obtain a reconstituted tobacco biotransformation solution; (3) reconstituted tobacco is produced through a conventional process of reconstituted tobacco, wherein in the process, the temperature exceeds 75 DEG C, enzymes and the bacteria are inactivated, and rolling is conducted to obtain the reconstituted tobacco. According to the reconstituted tobacco, of which the fragrance quality is improved by the biotechnology, produced by the method, the irritation is reduced, the green miscellaneous gas is reduced, the fragrance is rich and elegant and is sweet as milk, and the fragrance quality of the reconstituted tobacco is improved.

The invention provides a recovery method of a waste polyester blended fabric containing natural fibers. The recovery method comprises the following steps: putting the waste polyester blended fabric ina water soluble tertiary amine oxide solution containing an antioxidant, so that the natural fibers are dissolved to form a fiber solution and a solid insoluble matter; then recovering the fiber solution to obtain regenerated natural cellulose fibers and recovering a polyester solid through sequentially adding an ester solvent and fatty alcohols in the solid insoluble matter. The recovery methodprovided by the invention can separate polyester from other natural fibers, is suitable for all polyester blended fabrics, makes up the blank in the prior art, has high recovery rate for the polyesterand the regenerated natural cellulose fibers and avoids the use of a chemical reagent with high toxicity and large irritation, and the used reagent can also be recycled. The recovery method providedby the invention has the advantages of being high in efficiency, low in cost, environmentally-friendly, wide in application range and the like, thereby having industrial application potentials.

The invention provides a method for improving the sensory quality of reconstituted tobaccos through biotransformation. The method comprises the following steps that 1, strain activation is performed: bacillus methylotrophicus (VJ4-1) is inoculated to an oblique-plane culture medium and then is inoculated to a seed culture medium, and a seed culture solution is prepared through transfer; 2, composite biotransformation pretreatment is performed: in a reconstituted tobacco extraction process, the seed culture medium in the step 1 is inoculated to a reconstituted tobacco water solution, penicillium citrinum feruloyl esterase, xylanase, glucose oxidase, catalase, phenol oxidase and other complex enzymes are added, stirring and even mixing are performed, and a reconstituted tobacco biotransformation solution is obtained through fermentation; 3, the reconstituted tobaccos are produced through a conventional reconstituted tobacco process, the temperature exceed 75 DEG C in the process, the enzymes and bacteria are inactivated, and the reconstituted tobaccos are obtained through rolling. The produced reconstituted tobaccos with the aroma quality improved by adopting a biotechnology have good aroma with a slight milk flavor, the irritation is reduced, green miscellaneous smell is decreased, and the sensory quality of the reconstituted tobaccos is improved.

The invention discloses an electrochemical method for processing garbage percolate concentrated solution. The electrochemical method includes adjusting pH value of the garbage percolate concentrated solution to 2-4, conducting primary electrochemical processing on the garbage percolate concentrated solution by utilizing a high voltage pulse power supply and an alloy electrode, then adding an oxidation accelerator and a catalyst for further conducting fenton reaction, utilizing the high voltage pulse power supply and an advanced oxidation electro catalysis electrode to conduct secondary electrochemical processing, namely the anode electro catalysis oxidation reaction and the cathode electro catalysis reduction reaction, on supernate till the ratio of BOD5 / CODcr of the supernate is larger than or equal to 0.35 to obtain modified garbage percolate concentrated solution capable of conducting aerobic biochemical degradation. The electrochemical method conducts non-selective oxidation degradation and reduction modification on different organic molecules with different structures in the concentrated solution, effectively eliminates biotoxicity of the concentrated solution, reduces salt content, reduces pollutant density and accordingly lays foundation for standardized discharge of processed garbage percolate concentrated solution.

The invention discloses a high-frequency crude oil dehydrator. A high-frequency dehydrator is connected with an impedance allocating network; a high-frequency radiator is connected with a temperature detection system; the temperature detection system is respectively connected with the impedance allocating network, a power amplification tank circuit, a high-frequency oscillation circuit and a detection and alarm system; the detection and alarm system is connected with a control system of a power supply system; the control system of the power supply system, the high-frequency oscillation circuit, the power amplification tank circuit and the impedance allocating network are all connected with a cooling system; a radial high-frequency electric field is generated by the high-frequency dehydrator at the high frequency; the orientation polarization is generated under the action of the electric field; two ends of water droplets induce and generate opposite charges to form an induction electric field; dipole coalescence is generated between the similar water droplets; the water droplets are condensed to form large water droplets; the large water droplets are demulsified and settled; the high-frequency electric field accelerates polar molecules to rotate at high speed and cause charge neutralization; when liquid globules lose the action of double electric layers, the liquid globules collide and gather, so that the oil and the water are separated. The high-frequency crude oil dehydrator has the characteristics of low operation cost, dehydration simplicity, high dehydration efficiency, stability and safety in dehydration, and green and environment-friendly performance.

The invention discloses a preparation method of a denitration and demercuration integrated catalyst powder. The method includes: beating hydrated titanium dioxide and nano cerium oxide evenly in a stirring tank for slurrying, adding ammonia water and a suspending agent to adjust the slurry viscosity, then conducting horizontal mixing of an agitator and vertical circulation of a circulation pump to realize multi-dimensional mixing of hydrated titanium dioxide and nano cerium oxide so as to obtain a stable and uniform titanium cerium suspension solution, and then carrying out pressure filtration and calcinations to obtain titanium cerium powder. The method can realize uniform mixing of CeO2 in the carrier TiO2, and the vanadium tungsten titanium cerium denitration and demercuration integrated catalyst prepared from the titanium cerium powder has greatly improved yield and catalytic efficiency.

The invention discloses a method for synthesizing acryloyl morpholine based on anhydride. The acryloyl morpholine monomer is generated by performing a reaction of the acrylate trichloroacetic anhydride and the morpholine, and the acrylate trichloroacetic anhydride is obtained by performing a reaction of the acrylic acid and the trichloroacetic acid. The method for synthesizing acryloyl morpholine provided by the invention is simple in process route, easy for reaction control, mild in reaction condition, cheap in raw material, stable in product structure and low in cost; and besides, the method also increases the purity and yield of the product and has an industrial application prospect.

The invention relates to the technical field of microbial fermentation, in particular to furfural-tolerant actinobacillus succinogenes GXAS-137FM as well as a breeding method and application thereof.Actinobacillus succinogenes GXAS137 is used as a primary strain, and a strain GXAS-137FM capable of tolerating the concentration of 1.6 g / L furfural is obtained through a biological domestication method. The strain can be used for industrial large-scale production of succinic acid, and has the advantages of no pollution and low cost.

The invention discloses a method for synthesizing acryloyl morpholine based on anhydride. The acryloyl morpholine monomer is generated by performing a reaction of the acrylate trichloroacetic anhydride and the morpholine, and the acrylate trichloroacetic anhydride is obtained by performing a reaction of the acrylic acid and the trichloroacetic acid. The method for synthesizing acryloyl morpholine provided by the invention is simple in process route, easy for reaction control, mild in reaction condition, cheap in raw material, stable in product structure and low in cost; and besides, the method also increases the purity and yield of the product and has an industrial application prospect.

The invention provides quaternary phosphonium salt with a structural formula shown by formula I. The invention also provides application of the quaternary phosphonium salt as a reaction catalyst for preparing an amide / imide type polycarboxylic acid macromonomer. The quaternary phosphonium salt provided by the invention has the advantages of novel structure, large conjugate area, strong alkalinity (pKa=40-45) and high catalytic activity and applicability; the preparation method is simple and feasible, and a water carrying agent and a polymerization inhibitor are not needed in the reaction process; and moreover, the cost and energy consumption are low, and the method is environment-friendly and clean and has a prospect in industrial application.

The invention provides a comprehensive method for all-around improvement of quality of reconstituted tobacco. The comprehensive method comprises the following steps: (1) compound fermentation: in a reconstituted tobacco extracting process, fermenting a reconstituted tobacco water solution with a compound of aspergillus niger, feruloyl esterase, soil lignin peroxidase, bacillus licheniformis powder and freeze-dried lactobacillus powder; (2) adsorbing nicotine in an extracting solution by virtue of strong acid in-exchange macroporous resin for 30-60min, and conducting filtering to remove the nicotine by virtue of a sieve so as to obtain an extracting solution; (3) concentrating the reconstituted tobacco in a vacuum environment at 75-85 DEG C until a solid content is 40%, so as to obtain a concentrated solution; (4) drying residues, which are obtained by extracting the reconstituted tobacco, by virtue of a dryer at 100-120 DEG C, and deactivating enzyme and bacteria so as to obtain tobacco substrates; and (5) rolling the tobacco substrates. With the application of the comprehensive method provided by the invention, the produced reconstituted tobacco is low in irritation, mellow in taste and smell, elegant in aroma, light in green miscellaneous gas and smooth in smoke, and the all-around improvement of the quality of the reconstituted tobacco is achieved.

The invention relates to the technical field of photoelectrocatalysis, and specifically discloses a novel composite electrode as well as a preparation method and application thereof. The composite electrode comprises an electrode substrate, titanium dioxide nanotubes, acidified carbon nanotubes, an imidazole type ionic liquid and phosphomolybdic acid in sequence from the inside to the outside; andthe preparation method comprises the steps of preparing the titanium dioxide nanotubes on the electrode substrate, then supporting the acidified carbon nanotubes on the titanium dioxide nanotubes, depositing the imidazole type ionic liquid, and depositing phosphomolybdic acid. The composite electrode provided by the invention can efficiently degrade polycyclic aromatic hydrocarbons at a lower current density.

The invention discloses a preparation method of an SMA and PVDF blended hollow fiber membrane, which belongs to the technical field of membrane science. The preparation method comprises the following steps of 1) heating, stirring and dissolving PVDF, SMA, a solvent and a pore-foaming agent to form a mixed solution, and performing vacuum defoaming on the solution to obtain a spinning solution, and 2) obtaining a hollow fiber membrane by adopting wet spinning, enabling the primary hollow fiber membrane filaments to sequentially pass through an air layer, a coagulating bath and filament winding collection, then entering a water tank for further exchange, fishing out the membrane filaments after the exchange is finished, and naturally airing in a shady, cool and ventilated place to finally obtain the hollow fiber membrane. According to the preparation method of the SMA and PVDF blended hollow fiber membrane, the preparation method is simple, the hydrophilicity of the PVDF hollow fiber membrane is gradually increased along with the increase of the addition amount of SMA, and the anti-pollution performance of the PVDF hollow fiber membrane is gradually enhanced.

The invention belongs to the technical field of heavy metal sewage treatment, and particularly relates to a heavy metal adsorption fiber membrane which is formed by staggering and weaving PVDF-coated PAN composite fibers. The PVDF-coated PAN composite fiber comprises a PVDF core fiber and a PAN shell layer coating the PVDF core fiber, and the outer surface of the PAN shell layer is a functional layer subjected to oximation and / or carboxylation modification treatment. In addition, the invention also provides a preparation method of the fiber membrane. The invention provides a PVDF-coated PAN (Polyvinylidene Fluoride) composite fiber with a brand new structure and a fiber membrane material obtained by interlacing and weaving the fiber. Research finds that the membrane material disclosed by the invention has excellent metal adsorption performance and also has excellent mechanical performance and cyclic adsorption stability.

The invention belongs to the field of membrane separation, and more specifically relates to a cyclodextrin-modified polyamide film composite membrane, its preparation and application. The preparation method of the composite film comprises the following steps: soaking the polymer base film in the polyamine aqueous solution, taking it out after soaking to obtain the treated polymer base film; contacting the treated polymer base film with the polybasic acid chloride solution, so that Interfacial polymerization of polyamines and polyacyl chlorides to obtain a polyamide composite film; transfer the composite film to an aqueous solution of cyclodextrin or an aqueous solution of aminated cyclodextrin for soaking, so that the residual polyacyl chloride solution and cyclodextrin on the surface of the composite film The fine aqueous solution or the aminated cyclodextrin aqueous solution undergoes a secondary interfacial polymerization reaction, and a cyclodextrin-modified polyamide composite membrane is obtained after washing. The process of the invention is simple, and the prepared membrane has good hydrophilicity, and when it is applied to the separation of alcohol / water, it shows high-efficiency separation performance.

The invention discloses a method for preparing gelatin by an ultrasonic assisted enzyme method, and belongs to the field of gelatin preparation. The method is as follows: using hydrochloric acid for decalcification of defatted bone meal with the particle size of less than or equal to 600 mu m, filtering with gauze, adding water into the obtained decalcified bone meal for mixing to obtain slurry, adding an inorganic acid to adjust the pH value of the slurry to 1.5-4.5, then adding protease for enzymolysis, applying ultrasonic wave to the slurry while the enzymolysis, after solid-liquid separation by a centrifuge, removing the protease from water washing slag, adding water into enzymolyzed ossein for mixing, adjusting the pH value of the slurry, heating for extraction to obtain mixed slurry containing gelatin, using the centrifuge for solid-liquid separation to obtain a gelatin transparent solution, filtering, desalting, performing ion exchange, concentrating and drying to obtain a high quality gelatin product with the gel strength greater than 240Bloomg and viscosity higher than 4.6mPa.s. The yield of ultrasonic assisted enzymatic hydrolysis is improved by over 10% compared with that of conventional enzymatic hydrolysis.