166 results about "Adiponitrile" patented technology

The invention provides a method for synthesizing adiponitrile through selective ammoxidation of cyclohexene oxide. The invention aims to simulate and optimize the process of synthesizing adiponitrile from cyclohexene oxide by a one-step direct ammoxidation method to develop a novel multiphase composite metal vanadium-based oxide catalyst, the composition of the catalyst is CoaVbPcModMNOx / TiO2, the active elements of the catalyst comprise vanadium element V, cobalt element Co, phosphorus element P and molybdenum element Mo, M is an auxiliary metal element (Mn, Cr, Fe or Ni), and N is an alkali metal (Na, K or Cs); the value range of a is 0.2 to 1.2; the value range of b is 0.8 to 1.5; the value range of c is 0.1 to 0.23; the value range of d is 0.07 to 0.35; x is the oxygen atom proportion required by the metal oxidation valence state. The catalyst has the advantages of simple preparation, good cycling stability, high yield and the like. The yield and the product purity of the adiponitrile are improved, the energy consumption in the production process of the adiponitrile is reduced, and the breakthrough of the production technology of the adiponitrile is realized.

The invention relates to a supergravity adiponitrile production system and method, the system comprises a supergravity nitrile reactor, a separation tower, a semi-nitrile evaporator and a refining device, the middle part of the supergravity nitrile reactor is communicated with the lower part of the separation tower through a main pipeline, and the top of the supergravity nitrile reactor is communicated with a main ammonia gas pipeline; the top of the separation tower is respectively communicated with an ammonia recovery pipeline and a water recovery pipeline, and the upper part of the separation tower is communicated with the refining device through a pipeline; and the top of the semi-nitrile evaporator is respectively communicated with the bottom of the separation tower, the main pipeline and the main ammonia gas pipeline through pipelines. The reactor has the beneficial effects that the characteristics of structure, technology and the like of the supergravity reactor are utilized, the reverse concentration gradient of ammonia gas and molten adipic acid is formed in the radial direction of the rotor from inside to outside, the gas-liquid contact specific area is increased, the mass transfer driving force is increased, the reaction rate is increased, reaction products are separated out in the reaction process, and the reaction is accelerated and pushed.

The invention relates to a sodium ion battery and a nitrile-based electrolyte thereof. The electrolyte comprises: a solvent formed by fluoroethylene carbonate and at least one selected from the group consisting of dinitrile, 3-methoxypropionitrile, isobutyronitrile, valeronitrile, ethylene glycol bis (propionitrile) ether and 4-cyano tetrahydropyran, wherein the volume fraction of fluoroethylene carbonate is 5-20%; and at least one sodium salt selected from the group consisting of sodium hexafluorophosphate, sodium trifluoromethanesulfonate, bis (trifluoromethylsulfonyl) imide sodium and bis (fluorosulfonyl) imide sodium, with a concentration of 2.0-4.0 mol L <-1 >. The electrolyte provided by the invention can simultaneously stabilize an interface between a positive electrode and a negative electrode, and has reasonable ionic conductivity and high electrochemical stability.

The invention provides a hydrocyanation reaction method, the hydrocyanation reaction method is carried out in a reaction system containing aromatic amine under the action of a nickel-monodentate phosphite ligand catalyst, the structure of the aromatic amine is # imgabs0 #, and X1-X3 groups and Y1-Y3 groups respectively comprise any one of hydrogen, alkyl, alkoxy, alkylamino, hydroxyl and amino. The nickel-monodentate phosphite ligand catalyst and the aromatic amine with a specific structure are used in the hydrocyanation reaction method, so that the time of the hydrocyanation reaction method can be catalytically shortened, accumulation of ligand hydrolysate can be remarkably reduced or eliminated, and the loss of the catalyst in the reaction is reduced. The hydrocyanation reaction method disclosed by the invention is high in reaction efficiency, stable in catalyst performance, high in raw material conversion rate and product selectivity, and can be used for a preparation process for preparing adiponitrile by a direct hydrocyanation method of large-mass butadiene.

The invention provides a hydrocyanation reaction method, the hydrocyanation reaction method is carried out in a reaction system containing aromatic amine under the action of a nickel-bidentate phosphite ligand catalyst, the structure of the aromatic amine is # imgabs0 #, and X1-X3 groups and Y1-Y3 groups respectively comprise any one of hydrogen, alkyl, alkoxy, alkylamino, hydroxyl and amino. The hydrocyanation reaction method is high in reaction efficiency, accumulation of ligand hydrolysate can be remarkably reduced or eliminated, and the effective content of a catalyst in a reactant is stabilized; in addition, the hydrocyanation reaction method has the advantages of high reaction efficiency, few side reactions, high raw material conversion rate and high product selectivity, and can meet the requirements of a large-scale production process for preparing adiponitrile by using a butadiene direct hydrocyanation method.

The invention relates to an electrolyte, a secondary battery and an electronic device. Specifically, the invention provides the electrolyte, the electrolyte comprises propylene carbonate, propyl propionate, butanedinitrile and 1, 3, 6-hexane trinitrile, relative to 100 parts by mass of the electrolyte, the propylene carbonate accounts for 14 to 20 parts by mass, the propyl propionate accounts for 10 to 55 parts by mass, the butanedinitrile accounts for 0.3 to 4 parts by mass, and the 1, 3, 6-hexane trinitrile accounts for 1 to 6 parts by mass; the electrolyte further comprises adiponitrile, and the adiponitrile is 0.05-0.5 part by mass relative to 100 parts by mass of the electrolyte. According to the invention, the low-temperature discharge performance and the over-temperature safety performance of the secondary battery can be improved.

The invention discloses a green method for synthesizing hexamethylenediamine, which comprises the following steps: by taking adiponitrile and ethanol as solvents as raw materials and taking a porous cobalt-based catalyst and a solid base catalyst which are mixed according to a certain ratio as catalysts, reacting to obtain hexamethylenediamine at the reaction temperature of 70-90 DEG C under the reaction pressure of 2-5MPa H2 and the stirring rotating speed of 500-1000rpm. In the hydrogenation process, the two catalysts are mixed and added according to a certain proportion, and efficient conversion of adiponitrile and high selectivity of hexamethylenediamine can be realized under mild conditions. The catalyst used in the method is simple in preparation process, low in cost and easy to recover, the hexamethylenediamine synthesis process is green, and good economic benefits and application prospects are embodied. The method provided by the invention solves the problem that in the traditional process of synthesizing hexamethylenediamine through adiponitrile hydrogenation, inorganic alkali, such as sodium hydroxide, ammonia water and other strong corrosive additives, needs to be added, so that the conversion efficiency and selectivity are improved, the requirement on equipment is reduced, and meanwhile, the energy consumption of later separation is reduced.

The invention belongs to the technical field of organic matter synthesis, and discloses an adiponitrile preparation device and method based on a falling film reactor. The stirring assembly and the falling film reactor are adopted, and the stirring assembly can achieve further uniform dispersion and rapid dehydration of liquid flowing out of the falling film tube. Meanwhile, heat supply is not needed in the stirring assembly, the temperature of the liquid can be further reduced, and side reactions after the materials enter the gas-liquid separation tank are reduced. In the reaction process, liquids such as adipic acid and adiponitrile are uniformly dispersed in a gas phase, the local concentration is prevented from being too high in the heating process, water is rapidly separated in the reaction process, and the product yield is increased.

The invention provides a secondary battery and electronic equipment, the secondary battery comprises a positive pole piece, a negative pole piece and an electrolyte, the positive pole piece comprises a composite current collector and a positive pole material layer arranged on at least one surface of the composite current collector, the positive pole material layer comprises a nickel cobalt lithium manganate compound, and based on the total molar weight of metal elements except lithium, the total molar weight of the nickel cobalt lithium manganate compound is smaller than the total molar weight of metal elements except lithium; the molar percentage content of the nickel element in the nickel cobalt lithium manganate compound is X, and X is greater than 80%. The electrolyte comprises adiponitrile and butanedinitrile, based on the mass of the electrolyte, the mass percentage content of the adiponitrile is B1, the mass percentage content of the butanedinitrile is B 2, and X * B / B 2 is larger than or equal to 0.01 and smaller than or equal to 90. According to the invention, the capacity retention ratio and the lithium ion acceptability of the secondary battery after the high and low temperature impact test can be improved.

The invention relates to a preparation method of an adiponitrile hydrogenation catalyst, the catalyst and an adiponitrile hydrogenation method.The preparation method comprises the steps that oxide powder of an active component M is prepared through a flame synthesis method, and turbid liquid A containing the oxide powder of the active component M is mixed with a solution B containing precursors of an auxiliary 1 and an auxiliary 2; and then drying, roasting and molding to obtain the adiponitrile hydrogenation catalyst. According to the method, the adiponitrile hydrogenation catalyst with high active component content can be obtained, the active components and the auxiliary agent are mutually cooperated, the activity of the obtained adiponitrile hydrogenation catalyst is high, and the selectivity of the obtained hexamethylenediamine and co-production of the hexamethyleneimine is good.

The invention provides a preparation method and application of a nitrile compound hydrogenation catalyst based on polypyrrole derived carbon fiber loaded metal nickel. The catalyst is formed by taking PPy-derived carbon fiber as a carrier and uniformly dispersing metallic nickel on the surface of the carrier through a loading process, and a PPy-derived carbon fiber precursor is prepared; the preparation method comprises the following steps: dissolving active nickel metal salt and a precipitator in water, adding PPy derived carbon fibers as a precursor, and carrying out hydrothermal stirring, centrifugal filtration and low-temperature drying; and carrying out high-temperature calcination to obtain the highly dispersed nickel-loaded PPy catalyst. The catalyst prepared by the method provided by the invention can be suitable for selective hydrogenation of nitrile compounds to synthesize amine compounds, especially for hydrogenation of adiponitrile or 6-aminocapronitrile to prepare hexamethylenediamine, and the catalyst takes PPy derived carbon fiber as a carrier; the rich nitrogen defects and pore structures of PPy are utilized to realize metal capture and high-stability dispersion, and the conductive property provided by the PPy derived carbon layer promotes electron transport, so that the activity of the catalyst is improved.

Provided in the present application are a secondary battery and an electronic device. The secondary battery comprises a positive electrode sheet, a negative electrode sheet, and an electrolyte solution. The positive electrode sheet comprises a composite current collector and a positive electrode material layer provided on at least one surface of the composite current collector. The positive electrode material layer comprises a lithium nickel cobalt manganese oxide compound. On the basis of the total molar amount of metal elements other than lithium, the molar percentage content of nickel in the lithium nickel cobalt manganese oxide compound is X, wherein X>80%. The electrolyte solution comprises adiponitrile and succinonitrile. On the basis of the mass of the electrolyte, the mass percentage content of adiponitrile is B1, and the mass percentage content of succinonitrile is B2, wherein 0.01≤X×B1 / B2≤90. The present application can improve the capacity retention ratio and lithium ion acceptance of a secondary battery after a high- or low-temperature impact test.

The present invention relates to a production process for synthesizing hexamethylenediamine by catalytic hydrogenation of adiponitrile. The process comprises the following steps: 1) preparing a catalyst precursor; 2) calcining the catalyst precursor to obtain a catalyst; 3) catalytic hydrogenation of adiponitrile under the condition of the catalyst to synthesize crude hexamethylenediamine; 4) separating hexamethylenediamine from the discharge of a fluidized bed reactor containing crude hexamethylenediamine. The present invention uses Ni(NO3)2 and / or Mg(NO3)2 as main raw materials, doped with transition metal oxides, and then performs ultrasonic adsorption using Al2O3 as a catalyst carrier to load Ni(NO3)2 and / or Mg(NO3)2 and transition metal oxides on Al2O3, and obtains a catalyst through high-temperature calcination. The doping of transition metal oxides can improve the basicity of the catalyst, eliminating the need to add a strong basic co-catalyst in the catalytic reaction stage, reducing by-product formation. Moreover, it increases the specific surface area of the catalyst, thereby reducing the adsorption of the reaction product hexamethylenediamine on the catalyst, extending the service life of the catalyst, and saving the energy consumption for catalyst regeneration.

The invention discloses a preparation method and application of a high-performance hexamethylenediamine synthesis catalyst, and belongs to the technical field of new materials. A nickel-based hexabasic alloy is prepared from 10%-30% of Ni, 20%-30% of Fe, 0.5%-3% of Mo, 0.5%-3% of Cr, 0.5%-3% of Mn and 50%-60% of Al through a vacuum melting method, the nickel-based hexabasic alloy is physically crushed into alloy powder, then the porous nickel-based catalyst is prepared through a dealloying method, iron plays a role in reducing the cost, the selectivity is improved through the microelement molybdenum, the mechanical strength is improved through the chromium, and the catalytic activity is improved through the manganese. The catalyst has the characteristics of simple preparation process, low preparation cost and the like, has more excellent reaction activity, target selectivity and stability in the reaction of synthesizing hexamethylenediamine through hydrogenation of adiponitrile compared with an industrial catalyst, and shows good economic benefits and application prospects.

The application discloses a supported PtNi b-site adiponitrile hydrogenation catalyst and a preparation method and application thereof, and belongs to the technical field of thermal catalysis. The preparation method comprises the following steps: (1) dispersing ammonium tungsten oxide pentahydrate in water, adding an acidic solution, condensing and refluxing, heating and reacting, centrifugal filtering and drying the precipitate to prepare tungsten oxide nanorod carriers; (2) dispersing the tungsten oxide nanorod carriers in a solvent, adding a platinum salt solution, stirring, evaporating the solvent, and calcining the solid to prepare a catalyst precursor; and (3) dispersing the catalyst precursor in a solvent, adding a nickel salt solution, stirring, evaporating the solvent, and calcining the solid to prepare the catalyst. The application introduces Pt and Ni on the reducible WO3 carrier to construct a bimetallic active site catalyst, and the bimetallic active site catalyst can catalyze the reaction of adiponitrile hydrogenation to prepare primary amine under mild conditions, has the characteristics of low noble metal loading, high activity and high selectivity, and has important industrial application value.

The invention discloses a system and a method for preparing adiponitrile by electrolyzing acrylonitrile, and relates to the technical field of chemical product preparation, reaction and separation are efficiently coupled through process innovation, so that an acrylonitrile recovery unit is omitted, the safety is improved, and a modularized external reaction area capable of being flexibly expanded is introduced into the design of a reactor. The design aims to fundamentally break through the physical limitation of traditional equipment on the electrode area, and a brand new technical path is provided for realizing high-efficiency and low-energy-consumption large-scale industrial production. Nearly complete conversion of acrylonitrile is realized through the rectifying tower, and a tower kettle product does not contain unreacted acrylonitrile, so that a complicated acrylonitrile recovery tower and a circulating system do not need to be arranged in a subsequent separation system, the process is remarkably shortened, and equipment investment and operation energy consumption are reduced.

The application provides an electrolyte for electrolysis of acrylonitrile to adiponitrile, which comprises acrylonitrile, modified quaternary ammonium salt and water, wherein the modified quaternary ammonium salt comprises functional groups shown in formula (a) and formula (b) simultaneously, the functional group shown in formula (b) is wherein R1-R4 in formula (a) are alkyl groups with carbon number of 0-6; formula (b) is an alkyl group with carbon number of n, n=1-20; the structure of the modified quaternary ammonium salt contains 2-4 functional groups shown in formula (a). A method for electrolysis of acrylonitrile to adiponitrile by using the electrolyte is also disclosed. The electrolyte for electrolysis of acrylonitrile to adiponitrile contains modified quaternary ammonium salt, thereby improving the conversion rate and selectivity of electrolysis of acrylonitrile to adiponitrile.

The application discloses a preparation method of an iron-based composite anode for electrochemical synthesis of adiponitrile, and the iron-based composite anode comprises an iron base material which can be pure iron, carbon steel, 304, 316L, 904L, 2204 and the like, and a tungsten carbide bottom layer and a doped active layer are sequentially arranged on the surface of the iron base material from inside to outside. The tungsten carbide bottom layer is sprayed on the surface of the iron base material, and the doped active layer is prepared on the tungsten carbide bottom layer. In the electrochemical synthesis of adiponitrile, the iron-based composite anode is used as an anode. The iron-based composite anode improves the adhesion between the doped active layer and the base material, improves the electric conductivity, and improves the corrosion resistance. In the electrochemical synthesis of adiponitrile, the problem of easy corrosion of the anode in electrolysis is solved, the service life is prolonged, and the yield of adiponitrile and the electrolytic current efficiency are improved.

This invention relates to a method for preparing hexamethylenediamine by hydrogenation of adiponitrile in the presence of a Raney nickel catalyst, wherein a Raney nickel catalyst modified by treatment with carbon monoxide or carbon dioxide in a liquid medium is used.

The application provides a method for synthesizing adiponitrile by selective ammoxidation of epoxycyclohexane. The purpose of the application is to simulate and optimize the process of synthesizing adiponitrile by one-step direct ammoxidation of epoxycyclohexane, and to develop a new type of multiphase composite metal vanadium-based oxide catalyst, which is composed of Co a V b P c Mo d MNOx / TiO2, the active elements of which include vanadium element V, cobalt element Co, phosphorus element P and molybdenum element Mo, M is an auxiliary metal element (Mn, Cr, Fe or Ni), N is an alkali metal (Na, K or Cs); the value range of a is 0.2-1.2; the value range of b is 0.8-1.5; the value range of c is 0.1-0.23; the value range of d is 0.07-0.35; x is the proportion of oxygen atoms required to meet the oxidation state of metal. The catalyst has the advantages of simple preparation, good cycle stability, high yield and the like. The yield and product purity of adiponitrile are improved, the energy consumption in the production process of adiponitrile is reduced, and a breakthrough is realized in the production technology of adiponitrile.

This invention relates to the field of organic synthesis technology and discloses a method and system for preparing adiponitrile. The method includes: S1: atomizing molten adipic acid and mixing it with ammonia gas, followed by an ammoniation reaction to generate an ammoniation product; S2: dividing the ammoniation product into two parts, a and b. Part a undergoes a countercurrent, non-contact heat exchange with hot material to generate crude adiponitrile through heating and dehydration, while part b is recycled back to step S1 to participate in the reaction. The ratio of the ammoniation product in part a to that in part b is (1~5):1. The temperature of the hot material is higher than the temperature of the ammoniation product in part a. This invention improves the efficiency of the ammoniation reaction, reduces the decomposition side reactions of adipic acid and the residue of adipic acid, and significantly improves the conversion rate of the dehydration reaction and the selectivity of adiponitrile.

The invention relates to a hydrogenation method for synthesizing hexamethylenediamine and co-producing hexamethyleneimine, which comprises the following steps: feeding an adiponitrile-containing raw material and hydrogen into a tube pass of a shell and tube reactor, contacting with an activated adiponitrile hydrogenation catalyst, reacting under the condition of adiponitrile hydrogenation reaction, separating the obtained reaction effluent, and separating the separated reaction effluent to obtain the hexamethyleneimine. At least a hexamethylenediamine product and a hexamethyleneimine product are obtained. The process route is simple and optimized, the operation is simple, convenient and safe, the continuous production can be realized, the cost is low, and the product yield is high.

The invention discloses a method for preparing hexamethylenediamine through nitrile hydrogenation, which comprises the following steps: carrying out hydrogenation reaction on adiponitrile to obtain reaction liquid, and then carrying out post-treatment to obtain the hexamethylenediamine, wherein the hydrogenation reaction system further comprises an adsorbent and mother liquor generated in the post-treatment process. According to the method, the mother liquor containing impurities such as azaheptyl ring Schiff base and nitrile hydrolysis ammoniation byproduct amide is returned to the reactor, and the adsorbent is added in the reaction, so that compared with a production process in which the mother liquor is not recycled, the content of the reaction byproduct AMCPA can be reduced to 5 mg / kg or below, and the polarogram value of the hexamethylenediamine product is smaller than or equal to 20 mmol IB / t-HMD.

The invention discloses a preparation method of an adiponitrile derivative with a complex skeleton, which comprises the following steps: taking cheap and easily available terminal olefin, a safe and nontoxic cyano source azobisisobutyronitrile and a derivative thereof as initial raw materials, and carrying out cross-coupling reaction without a transition metal catalyst; an adiponitrile derivative with a complex skeleton and a plurality of all-carbon quaternary carbon centers is constructed in one step; the method is mild in condition, the reaction process is easy and convenient to operate, the substrate adaptability is wide, and the prepared adiponitrile derivative with the complex framework has the value as a functional material precursor.

The invention provides a synthesis method of 1-amino-2-cyano-1-cyclopentene, which comprises the following steps: 1, mixing an ionic liquid and a super-strong organic alkali in a protective gas atmosphere, heating, stirring, uniformly mixing and dissolving to obtain a material A; the ionic liquid is selected from at least one of [BMIM] PF6, [BMIM] BF4, [BMIM] NTf2, [BMIM] OTf and [BMIM] OAc; 2, adiponitrile is dropwise added into the material A under stirring for a reaction, and a material B rich in 1-amino-2-cyano-1-cyclopentene is obtained; 3, cooling and crystallizing the material B, and carrying out pressure filtration to obtain an ACCP crude product; and 4, recrystallizing and refining the obtained ACCP crude product to obtain a pure product. The method provided by the invention has the advantages of simplicity, high efficiency, sustainable production, low cost, low content of generated three wastes, mild reaction conditions and suitability for industrial production.

This invention provides a cleaning agent for nitrile coking deposits, its preparation method, and its application, relating to the field of cleaning agent technology. The cleaning agent for nitrile coking deposits of this invention uses adiponitrile and methylglutaronitrile, which have highly similar molecular structures to the coking deposits, as the main solvents, working with ligands, surfactants, and corrosion inhibitors to achieve efficient dissolution and stripping. The preparation method of the cleaning agent of this invention utilizes optimized phase-separation emulsification and dehydration processes to efficiently integrate hydrophilic and lipophilic functional components, producing a stable and homogeneous non-aqueous cleaning agent. The application of the cleaning agent of this invention in cleaning nitrile reactor residues, through closed-loop heating and online diversion filtration processes, can efficiently dissolve and strip coking deposits from the inner walls of equipment and complex pipelines; it achieves simultaneous cleaning, separation, and recovery, significantly reducing hazardous waste generation and ensuring operational safety and stability throughout the process.

The invention discloses an electrolyte, a lithium ion battery and electric equipment, the electrolyte comprises a lithium salt, a solvent and a functional additive, the functional additive comprises at least one of a first additive, a second additive and a third additive, the first additive comprises vinylene carbonate, methylene methanedisulfonate, divinyl sulfone and 1, 2, 4-trimethyl-1, 3-pentanediol monoisobutyrate, and the third additive comprises at least one of vinylene carbonate, methylene methanedisulfonate, divinyl sulfone and 1, 2, 4-trimethyl-1, 3-pentanediol monoisobutyrate. The first additive comprises at least one of 1, 3-propane sultone, the second additive comprises at least one of 4-(trifluoromethylsulfonyl) benzonitrile and ethylene sulfate, and the third additive comprises at least one of succinic anhydride, adiponitrile and 4-(trifluoromethylsulfonyl) benzonitrile. According to the characteristics and main problems of the lithium manganese iron phosphate battery, corresponding functional additives are respectively matched, so that stable electrolyte interface films are formed on the surfaces of the positive electrode and the negative electrode, dissolution of transition metal manganese ions of the positive electrode and deposition of the negative electrode are inhibited, and gas production of the battery under a high-temperature condition is reduced.

The invention provides a method for separating and purifying 1,2-cyclohexanediamine from a product synthesized from hexamethylenediamine by hydrogenating adiponitrile. The method comprises the steps of firstly rectifying the product synthesized from hexamethylenediamine by hydrogenating adiponitrile in a lightness removal tower, collecting the obtained bottom liquid, sending it to a refining tower for further rectification, and extracting 1,2-cyclohexanediamine from the top of the refining tower. The method successfully separates and purifies 1,2-cyclohexanediamine from a product synthesized from adiponitrile with complex components and similar physical properties by limiting the theoretical plate number, tower top operating pressure, and tower bottom operating temperature of the lightness removal tower and the theoretical plate number, tower top operating pressure, and tower top operating temperature of the refining tower, thereby effectively improving the product quality and production efficiency of 1,2-cyclohexanediamine.

The invention belongs to the technical field of green chemistry, and particularly relates to a method for modifying a flexible ring region of nitrile hydratase and application of the method. The specific method comprises the following steps: carrying out double mutation on nitrile hydratase sites alpha D38 and alpha I152, or carrying out double mutation on nitrile hydratase sites alpha E157 and beta G197, or carrying out quadruple mutation on the nitrile hydratase sites alpha D38, alpha I152, alpha E157 and beta G197, so as to construct the nitrile hydratase mutant with improved thermal stability. The thermal stability of the nitrile hydratase modified by mutation is greatly improved. The mutant nitrile hydratase can keep the conformation and activity for a longer time, the resistance to external thermal interference is enhanced, and the half-life period for catalyzing an adiponitrile reaction is remarkably prolonged, which is the inherent excellent attribute of the mutant nitrile hydratase as a catalyst, and the mutant nitrile hydratase has important reference significance for research on improvement of the thermal stability of the nitrile hydratase.

The present invention discloses a method for preparing adiponitrile, comprising the following steps: adding acrylonitrile, an ionic liquid, and water to an electrolytic cell, and generating adiponitrile by a reduction reaction at the cathode; wherein the cathode material comprises a substrate, an intermediate layer, and a surface layer, the substrate being selected from one of graphite, carbon steel, and titanium; the intermediate layer comprising a metal material selected from one of cadmium, lead, silver, and tin, and being connected to the substrate by supersonic flame spraying, magnetron sputtering, or plasma spraying; and the surface layer comprising two types of metals, the first type of metal being selected from one of metallic cadmium, lead, tin, and silver, and the second type of metal element being selected from one of rare earth metals. The present invention provides a green and efficient method for preparing adiponitrile, solving the problems of complex reaction processes, difficult product separation, and high safety risks associated with existing production technologies.