104 results about "Dimethylamine" patented technology

The invention discloses an anti-scale cross-linked polymer fracturing fluid and a preparation method thereof, and relates to the technical field of petroleum fracturing fluids. When the anti-scale cross-linked polymer fracturing fluid is prepared, allylamine hydrochloride and epoxy chloropropane react to prepare a double-bond chlorinated intermediate; reacting the double-bond chlorinated intermediate with lauramidopropyl dimethylamine to prepare a cationic monomer; copolymerizing a cationic monomer and acrylamide to prepare a cationic polymer; the preparation method comprises the following steps: reacting L-lysine with formaldehyde and phosphorous acid to prepare phosphoric acid modified lysine; reacting the phosphoric acid modified lysine with allyl glycidyl ether to prepare a phosphoric acid modified monomer; acrylamide and an anionic monomer are copolymerized to prepare an anionic polymer; the anionic polymer and the cationic polymer are dissolved in water to prepare the anti-scale cross-linked polymer fracturing fluid. The anti-scale cross-linked polymer fracturing fluid prepared by the invention has the advantages of scale prevention, good temperature resistance, good shear resistance and self-crosslinking.

The disclosure relates to a method of producing a multi-metal catalyst film and of producing a reactor system for catalytic removal of a wide variety of contaminants (for example, nitrate, nitrite, perchlorate, chlorate, chromate, selenate, chlorophenols, 2,4-D, dicamba, atrazine, trichloroacetic acid, bromochloroiodomethane, NDMA, TCE, TCA, chloroform, freons, RDX, HMX, TNT, PFOA, and PFOS) from water and wastewater. The disclosure also relates to a method of using the multi-metal catalyst for the removal of such contaminants and a system comprising the multi-metal catalyst film for removing such contaminants.

The invention relates to a high-strength transparent copolymerized polyamide material and a preparation method thereof, and belongs to the technical field of high-molecular compound synthesis. The technical problem to be solved by the invention is to provide the high-strength transparent copolymerized polyamide material. Polymerized monomers of the polyamide material are m-xylylenediamine and diacid monomers, the diacid monomers are adipic acid and 9, 10-anthracene dicarboxylic acid, and the molar ratio of the 9, 10-anthracene dicarboxylic acid to the adipic acid is 0.5: 9.5-2: 8. Compared with the existing MXD6, the polyamide material MXD6 / ACDA disclosed by the invention has the advantages of better mechanical property, good light transmittance, lower water absorption rate and higher heat-resistant temperature. A one-step polymerization process is adopted, all stages from raw materials to a finished product can be completed in one reaction kettle, production equipment is small, operation is simple, the production period is short, energy consumption and cost are low, later tackifying is not needed, only water serves as a byproduct, the production process is environmentally friendly, and the reaction is mild and safe.

The invention provides an ultrathin swelling-resistant GO cross-linked membrane as well as a preparation method and application thereof, and belongs to the technical field of nanofiltration separation membrane technology separation. The composite membrane comprises a cross-linked GO separation layer and a supporting layer, a m-xylylenediamine MXDA cross-linked GO layer is used as the separation layer, and a hydrolyzed polyacrylonitrile hPAN polymer membrane is used as the supporting layer; wherein the GO layer and the hPAN polymer film are covalently bonded through MXDA to form a cross-linked network. The preparation method comprises the following steps: firstly, respectively preparing graphene oxide GO; secondly, hydrolyzing a polyacrylonitrile (hPAN) matrix membrane; and finally, constructing a dual cross-linked network system through heat treatment, so that covalent cross-linked bonds are formed between GO nanosheet layers and between GO-hPAN base membranes, and the GO cross-linked membrane is prepared. The density of carboxylic acid groups on the surface of the hPAN membrane can be dynamically optimized by regulating and controlling the type of the basic catalyst, the concentration of the solution, the hydrolysis temperature and the hydrolysis time, a high-efficiency mass transfer channel is created for the composite membrane through a two-dimensional covalent cross-linked structure, and the composite membrane is endowed with excellent dye selective separation performance and anti-swelling stability.

The invention discloses a method for preparing m-xylylenediamine, a bubble generation component, a bubble generator and a three-phase bubbling bed reaction device.The problems that in the prior art, gas distribution is not uniform, the bubble generator is prone to being blocked, and the product quality is low are mainly solved, and the method comprises the steps that m-xylylenediamine is fed into a liquid-phase feeding section of the three-phase bubbling bed reaction device; hydrogen is fed through the bubble generator, so that the hydrogen is in contact with the m-xylylenediamine to generate the m-xylylenediamine. According to the invention, the conversion rate of the catalyst can be improved, the service life and regeneration period of the catalyst can be prolonged, and stable operation of the device is facilitated.

A continuous production process of a xylylenediamine compound comprises the following steps: a, mixing an aromatic dinitrile raw material, an organic composite solvent, a catalyst and an auxiliary agent according to a preset proportion to form a reaction raw material, and conveying the reaction raw material to the lower part of a hydrogenation reactor; b, hydrogen is input from the bottom of the hydrogenation reactor in a jet mode, the reaction raw materials and the hydrogen are subjected to a contact reaction, and the hydrogen is further used for providing driving force needed by reaction material airlift; and c, conveying the reaction material to the upper part of the hydrogenation reactor, and carrying out cyclone separation operation and the like. A device for realizing the continuous production process comprises a hydrogenation reactor, a raw material supply unit, a hydrogen circulation supply unit, a product filtering unit, a product buffer tank and the like. The invention relates to the field of organic and fine chemical synthesis, realizes continuous, stable, automatic and simple production of xylylenediamine compounds, and has the technical advantages of simplifying the production process, optimizing the reaction conditions, improving the safety and economy, saving energy, reducing consumption and the like.

The invention relates to a method for preparing a tin-diol dry photoresist by using molecular layer deposition, which comprises the following steps of: preparing a tin-based mixed film by using a tetradimethylamine tin (tin tetrachloride) metal source and a diol organic source as raw materials through a molecular layer deposition (MLD) technology, and taking the tin-based mixed film as a high-resolution dry positive photoresist. The tin-based photoresist can be used in electron beam lithography (EBL), extreme ultraviolet lithography (EUVL) and beyond extreme ultraviolet lithography (BEUVL). Under 50 kilovolt electron beam exposure, the resolution ratio can reach 7 nanometers at 2000 [mu] C / cm < 2 >; under extreme ultraviolet exposure, the resolution ratio can reach at least 18 nanometers at 22 mj / cm < 2 >; under exposure beyond extreme ultraviolet, the resolution ratio at 520 mj / cm < 2 > reaches at least 32 nanometers. The tin-based mixed photoresist disclosed by the invention has a wide application prospect, and a new technical scheme is provided for developing a semiconductor dry photoresist with higher performance.

This invention discloses a method for preparing furan-based monomer-modified polyamide industrial yarn, comprising the following steps: 1) First, prepare carboxyl-terminated PA6 oligomers for later use; 2) Mix the carboxyl-terminated PA6 oligomers obtained in step 1) with diamine and 2,5-furandimethylamine, add a catalyst after uniform mixing, and carry out polymerization reaction in a closed oxygen-free reaction system. After the reaction is completed, discharge and pelletize to obtain furan-based monomer-modified polyamide chips; 3) Extract and dry the furan-based monomer-modified polyamide chips obtained in step 2), then melt spin them, and after cooling, oiling, stretching, heat setting and winding, obtain furan-based monomer-modified polyamide industrial yarn with a strength >8.2 cN / dtex and an elongation at break in the range of 10-25%, which can be used in the field of polyamide industrial yarns such as automotive seat belts and tire cords.

The invention discloses semi-aromatic bio-based polyamide and a preparation method thereof, and belongs to the technical field of macromolecular organic materials. Monomers 2, 5-furan dimethylamine, dodecanedioic acid, undecanedioic acid and sebacic acid are used as raw materials, and the disclosed semi-aromatic bio-based polyamide has rigidity of aromatic rings and flexibility of aliphatic chains and has good thermodynamic properties and mechanical properties. The oxygen permeability of the semi-aromatic bio-based polyamide protected by the invention is 0.005 ml / m < 2 > / 24h, the semi-aromatic bio-based polyamide has excellent gas barrier property, the degradation initial temperature is 348.6 DEG C, the maximum degradation temperature is 373.2 DEG C, the crystal melting point (Tm) of a polymer is 226.4 DEG C, the glass transition temperature (Tg) is 169.5 DEG C, the thermal stability is high, the thermal transition temperature is low, and the semi-aromatic bio-based polyamide has good processability.

A method for treating wastewater containing methanol, in which methanol is subjected to anaerobic treatment, is characterized in that organic nitrogen having 2-4 carbon atoms (excluding amino acids) is added. The organic nitrogen is at least one of tetramethylammonium hydroxide, trimethylamine and dimethylamine.

Provided are a resin composition, and a molded body and a multilayer body using the resin composition. A resin composition which contains at least one type of chloride selected from the group consisting of chlorides of alkali metals and chlorides of alkaline earth metals, and which contains a xylylenediamine-based polyamide resin that contains a structural unit derived from a diamine and a structural unit derived from a dicarboxylic acid, 70 mol% or more of the diamine-derived structural units are derived from xylylenediamine, and 70 mol% or more of the dicarboxylic acid-derived structural units are derived from a C4-20 [alpha], [omega]-linear aliphatic dicarboxylic acid.

Provided is a method for producing a cycloolefin, comprising subjecting a monocyclic aromatic hydrocarbon to partial hydrogenation reaction with hydrogen in an aqueous zinc sulfate solution in the presence of a ruthenium catalyst, wherein the aqueous zinc sulfate solution contains dimethylamine, and the partial hydrogenation reaction is performed with a nitrogen concentration in the aqueous zinc sulfate solution adjusted to 0.5 to 3000 mg / L or an acetic acid concentration in the aqueous zinc sulfate solution adjusted to 1 × 10-3 to 100 mg / L.

This invention belongs to the field of polymer synthesis materials technology, specifically relating to a long-chain semi-aromatic MXD nylon material and its preparation method. The material is made from components comprising the following weight percentages: m-phenylenediamine 31%-41%, long-chain dicarboxylic acid 59%-69%, nucleating agent 0.05%-0.1%, catalyst 0.03%-0.05%, antioxidant 0.03%-0.05%, and solvent 100%-200%; the long-chain dicarboxylic acid is selected from C... 10 -C 18 This invention relates to a series of dicarboxylic acids. Through molecular structure design, synergistic additives, and process optimization, the prepared MXD nylon material achieves a synergistic balance of ultra-low water absorption, high barrier properties, and high toughness, overcoming the shortcomings of traditional MXD6, such as high brittleness and high water absorption. The process is green and environmentally friendly, with excellent processing performance, and can be widely used in high-barrier packaging, automotive, and electronic and electrical fields.

The invention relates to the field of coating rheological additives, in particular to heat storage stable type polyamide wax and a preparation method and application thereof.The polyamide wax comprises a polyamide wax matrix which is formed by polycondensation of an organic amine combination containing m-xylylenediamine and linear symmetric diamine and an acid component; polyamide fragments are bonded on the surface of the lamellar silicate nucleating agent through ion exchange; the polyamide fragment is formed by condensation of fatty acid and diamine. According to the preparation method, linear symmetric diamine is introduced into a polyamide wax matrix through a unique'molecular conformation optimization-defect targeted closing 'synergistic mechanism, so that the inherent defect density of the crystal is greatly reduced, and meanwhile, lamellar silicate bonded with polyamide fragments is used for accurately covering residual defect sites, so that a molecular-level physical barrier for blocking solvent invasion is formed; therefore, the coating still keeps the anti-sagging performance close to the initial state after being stored at a high temperature for a long time, and the problem of rheological failure caused by collapse of a crystal structure of a solvent type coating is thoroughly solved.

The application discloses a synthesis method of 2-phenyl benz-2-dimethylamine-1-(4-morpholine benzyl phenyl) butanone and belongs to the field of photoinitiator preparation. The method specifically comprises the following steps: (1) reacting chlorobenzene with morpholine to prepare N-phenyl morpholine; (2) performing a Friedel-Crafts reaction on N-phenyl morpholine and 2-amino butyric acid to prepare compound I; (3) performing an aminomethylation reaction on compound I, formic acid and formaldehyde to prepare compound II; and (4) reacting compound II with chlorobenzyl to obtain 2-phenyl benz-2-dimethylamine-1-(4-morpholine benzyl phenyl) butanone. By implementing the application, the process route can be simplified, the use of fluorobenzene, bromine and the like can be avoided, and the yield can be improved.

The present invention discloses a high-efficiency regenerated asphalt and a preparation method thereof, relating to the technical field of regenerated asphalt. The high-efficiency regenerated asphalt comprises the following raw materials in parts by weight: 5-15 parts base oil, 1-3 parts plasticizer, 0.5-1.5 parts anti-aging agent, 0.5-0.8 parts penetrant, 100 parts aged SBS modified asphalt, 3-5 parts structural repair agent, 1-4 parts anti-stripping agent, and 0.05 parts benzyldimethylamine; the structural repair agent is prepared by reacting tetrakis[4-(4'-carboxyphenyl)phenyl]ethylene with linoleyl alcohol to form a tetraester compound, which is then prepared under the action of formic acid and H2O2. The high-efficiency regenerated asphalt prepared by the present invention has good needle penetration, softening point, and anti-stripping properties.

The invention discloses a rapid curing powder coating special for thin-wall pipe fitting roll coating and a preparation method of the rapid curing powder coating, relates to the technical field of metal pipe fitting coating, and aims to solve the problem that the powder coating is difficult to realize uniform coating on a thin-wall base material in consideration of coating performance and pipe fitting structure stability. The invention relates to an epoxy resin paint, which is composed of 500 g of epoxy resin, 100 g of curing agent, 25 g of auxiliary agent, 18 g of pigment, 3 g of rapid curing agent and 354 g of filler, the epoxy resin is bisphenol A epoxy resin, the softening point is 80-120 DEG C, and the epoxy equivalent is 700-900 g / eq; the curing agent is a mixture of adipic dihydrazide and m-xylylenediamine; the auxiliary agent is a mixture of a modified silicone flatting agent, fumed silica and polyethylene wax micro powder; the pigment is one or a mixture of more of titanium dioxide, carbon black, iron oxide red and ultramarine. The method has the advantage of meeting the coating requirement of the precise pipe fitting.

The method comprises the following steps that goose down is soaked in a glutaraldehyde solution in a heat preservation mode, an enzyme preparation is added, the goose down is subjected to heat preservation and standing for enzymolysis treatment, and pretreated goose down is obtained after inactivation, cleaning and drying; 3-aminopropyltriethoxysilane is used for modifying biomass activated carbon to obtain modified biomass activated carbon, the modified biomass activated carbon adsorbs a waterborne polyurethane solution, then low-temperature baking is conducted, and the modified biomass activated carbon is ultrasonically dispersed into the pretreated down feather; raw materials are mixed to prepare membrane liquid, the membrane liquid is prepared from dopamine hydrochloride, glycerol triglycidyl ether, m-xylylenediamine, nano silicon dioxide, lithium chloride, ethyl alcohol and deionized water, and the membrane liquid forms a membrane layer on the surface of goose down through an electrostatic atomization-deposition method. The prepared goose down is high in washing resistance, high hydrophobicity and antibacterial property can still be kept after multiple times of washing, and the filling power of the goose down can be improved.

This invention relates to the field of hydrogenation technology for nitrile compounds, specifically to a method for hydrogenating nitrile compounds. The method includes the following steps: (a) mixing a solution containing a nitrile compound with a hydrogen feedstock, and then subjecting the mixture to a hydrogenation reaction to obtain a hydrogenated product; (b) separating the hydrogenation product from step (a) into a gas phase and a liquid phase, with a portion of the gas phase recycled back to the hydrogen feedstock and a portion of the liquid phase recycled back to the solution containing the nitrile compound. By recycling a portion of the gaseous and liquid phase reaction products back to the feedstock before mixing, side reactions can be effectively suppressed and the accumulation of heavy components during the reaction process can be avoided. This solves the problems of low selectivity, unstable operation, short expected catalyst lifespan, poor equipment safety, and poor process stability in the preparation of amine compounds in existing technologies. It can be used for the industrial continuous production of amine compounds such as m-phenylenediamine.

The present application relates to the field of film, particularly to a kind of biaxially oriented polypropylene matt film and its preparation method, matt film includes the matt layer, core layer and light layer arranged in sequence, matt layer includes random copolymer polypropylene and 40~55wt% high density polyethylene;Core layer includes homopolymer polypropylene and 10~15wt% relative viscosity is 2.2~3.5 m-xylylenediamine-adipic acid copolymer;Light layer includes homopolymer polypropylene and 5~10wt% 2,2,6,6-tetramethyl-4-piperidinol graft polyethylene.The present application is through 2,2,6,6-tetramethyl-4-piperidinol graft polyethylene capture polypropylene radical generated by ultraviolet light initiation;Also through m-xylylenediamine-adipic acid copolymer improves the dimensional stability of film under temperature change, and inhibits oxygen from core layer to light layer migration, synergistic inhibition chain degradation, reduce light layer powder, improve the problem of uneven transfer of coating liquid, meet the demand of high-speed production.

The invention discloses a method and device for continuously preparing isoproturon, and the preparation method comprises the following steps: S1, at normal temperature and pressure, respectively controlling a p-isopropyl phenyl isocyanate solution and dimethylamine N, N-dimethyl carbamate to be continuously input into a reactor at a certain flow rate, controlling the jacket temperature of the reactor, and carrying out an addition reaction on the two materials in the reactor, isoproturon and a by-product carbon dioxide are generated; s2, the material obtained in the step S1 enters a gas-liquid separator for gas-liquid separation, and a mixture of isoproturon and the solvent is obtained; s3, the mixture obtained in the step S2 enters a centrifugal machine for solid-liquid separation, and products isoproturon and a solvent are obtained. According to the invention, a continuous feeding mode is adopted, so that continuous addition reaction among raw materials is realized, efficient and continuous production of isoproturon is realized, and the production efficiency is improved.

The invention relates to a preparation method of a novel perovskite C8H32Cl7 (In1-xSbx) N4 yellow luminescent material, which comprises the following steps: sequentially dissolving indium chloride, dimethyl ammonium chloride, antimony chloride, oleylamine, oleic acid and concentrated hydrochloric acid in dimethyl sulfoxide, and fully stirring and mixing; reacting the mixed solution at a constant temperature, and leaving a generated product after the reaction is finished; and repeatedly cleaning the product with toluene, and drying to obtain the yellow luminescent material. The size of the synthesized novel perovskite yellow luminescent material can reach 2 cm, the requirement of growth on growth conditions is low, and theoretically, the material can be successfully grown according to the synthesis conditions provided by the invention.

A method for improving a separation of tall oil soap from black liquor in a tall oil soap separation phase, which comprises adding of a polymer additive comprising cationic epichlorohydrin-dimethylamine based polymer into black liquor. The cationic epichlorohydrin-dimethylamine based polymer has a weight average molecular weight in the range of 1 500 – 500 000 g / mol. The cationic epichlorohydrin- dimethylamine based polymer may be further crosslinked with ethylenediamine (EDA). The polymer additive can be added to black liquor from pulping process prior to tall oil soap separation, and / or to a tall oil soap solution, which is achieved from separating tall oil soap from black liquor.

The present invention discloses an anti-scaling cross-linked polymer fracturing fluid and a preparation method thereof, and relates to the technical field of petroleum fracturing fluid. When preparing the anti-scaling cross-linked polymer fracturing fluid, the present invention first reacts allylamine hydrochloride with epichlorohydrin to obtain a double-bond chlorinated intermediate; the double-bond chlorinated intermediate is reacted with lauryl amide propyl dimethylamine to obtain a cationic monomer; the cationic monomer is copolymerized with acrylamide to obtain a cationic polymer; L-lysine is reacted with formaldehyde and phosphorous acid to obtain phosphoric acid-modified lysine; phosphoric acid-modified lysine is reacted with allyl glycidyl ether to obtain a phosphoric acid-modified monomer; acrylamide is copolymerized with an anionic monomer to obtain an anionic polymer; the anionic polymer and the cationic polymer are dissolved in water to prepare the anti-scaling cross-linked polymer fracturing fluid. The anti-scaling cross-linked polymer fracturing fluid prepared by the present invention has the advantages of anti-scaling, good temperature resistance, good shear resistance, and self-crosslinking.

The invention discloses an antibacterial fabric finishing liquid containing halamine, an antibacterial fabric as well as a preparation method and application of the antibacterial fabric, and relates to the technical field of fabric finishing liquids. A textile fabric is soaked in the finishing liquid for a heating reaction, then the textile fabric is soaked in a dimethylamine borane aqueous solution for a standing reaction, drying is conducted, the antibacterial textile fabric is obtained, and the finishing liquid comprises an antibacterial halamine siloxane derivative, silver nitrate and water; the structural formula of the antibacterial halamine siloxane derivative is as follows: the halamine-containing antibacterial silane derivative in the antibacterial fabric finishing liquid is hydrolyzed and then reacts with a hydroxyl group on the surface of a fabric, so that a broad-spectrum and efficient antibacterial effect is provided on the surface of the fabric through modification, silver ions are bonded on the surface of the fabric and are reduced into nano-silver particles by adopting dimethylamine borane, and the antibacterial effect is good. Through synergistic antibiosis of halamine and nano-silver, the efficient antibacterial rate is achieved, and the antibacterial rate of the fabric washed with water is still maintained at a high level.

The present invention discloses a low-density foaming agent for drainage and production increase in low-pressure and low-yield wells, comprising the following components in weight percentage: 15% to 20% hexadecyl or octadecyl dimethylamine oxide, 7% to 12% oleamidopropylamine oxide, 7% to 12% hexadecyl or octadecyl dihydroxyethylamine oxide, 2% to 5% sodium α-olefin sulfonate, and 47% to 74% water. Preparation method: First, sodium α-olefin sulfonate is added to water, the temperature is raised to 70-90°C, and the temperature is kept constant and stirred for 2 to 3 hours until the sodium α-olefin sulfonate is completely dissolved to obtain a transparent solution; then, alkyl dihydroxyethylamine oxide is slowly added to the transparent solution until the paste is completely dissolved and the stirring is continued for 30 minutes; then, oleamidopropylamine oxide is slowly added and the stirring is continued for 1 hour, and finally, alkyl dimethylamine oxide is added and the stirring is continued for 1 to 2 hours to obtain the foaming agent. The foaming agent of the present invention only requires extremely low energy to lift the fluid in low-yield and low-pressure wells, thereby achieving drainage, production increase, and production restoration effects.

The invention discloses a method for determining N-nitrosamine compounds in animal-derived food, and belongs to the field of food detection. The method comprises the following steps: freezing and grinding animal-derived food, mixing the animal-derived food with an internal standard solution, deionized water and acetonitrile, and freezing and preserving to obtain a pretreated sample; the method comprises the following steps: treating a pretreated sample through a QuEChERS salt bag, centrifuging, carrying out nitrogen blowing concentration, and mixing with deionized water to prepare an enriched solution; purifying the enriched solution by adopting a purification bag or specific functional resin, and centrifugally filtering to obtain a sample solution; and calculating the content of the target compound through a peak area ratio by using a liquid chromatograph-high resolution mass spectrometer provided with an APCI source and taking N-nitrosodimethylamine-D6 as an internal standard. The functional resin is formed by cross-linking specific functional monomers and is large in specific surface area and high in adsorption selectivity; the method has strong anti-interference capability, and can efficiently detect the N-nitrosamine compounds in dried aquatic products and other animal-derived foods.

The invention provides a resin composition, a photosensitive insulating adhesive film containing the same and application, and the resin composition comprises the following components in parts by weight: 30-60 parts of a photosensitive polymer; 10 to 30 parts of epoxy resin; 5 to 20 parts of an acrylic ester monomer; 0.5 to 5 parts of a photoinitiator; 0.05 to 1 part of a sensitizer; 10 to 40 parts of filler; the photoinitiator is prepared from a combination of 2-dimethylamino-2-(4-methyl) benzyl-1-[4-(4-morpholinyl) phenyl]-1-butanone and a phosphorus oxide type photoinitiator. The photosensitive insulating adhesive film prepared from the resin composition provided by the invention has relatively high glass transition temperature, relatively low CTE performance, excellent peel strength, relatively high photosensitive resolution and excellent easy-to-develop characteristic, and can meet the application requirements of the photosensitive insulating adhesive film.

The present application relates to a kind of double non-noble metal catalyst Co-Ni / La2O3 and its preparation method and the application of selective hydrogenation of m-xylylenediamine in heterogeneous system, belong to catalytic hydrogenation field, the Co-Ni loading of this catalyst is 5wt%, it is cobalt nitrate hexahydrate as cobalt source, nickel nitrate hexahydrate is nickel source, La2O3 is carrier, active metal Co, Ni is loaded on La2O3, reduction and passivation are prepared in tube furnace.The conversion rate of m-xylylenediamine reaches 100% under the conditions of catalyst 50mg, m-xylylenediamine 0.5g, hydrogen pressure 8MPa, temperature 180 DEG C, reaction 5h, and the selectivity of 1,3-cyclohexanedimethylamine reaches more than 70%.The preparation method is simple, low in cost, target product is high in selectivity, has excellent catalytic performance, and easy to separate and has industrialization prospect.

The invention relates to a method for preparing 2, 5-furandimethylamine from 2, 5-furandicarboxylic acid, which comprises the following steps: contacting a reaction substrate, a catalyst and a solvent in a closed container, and reacting in a mixed atmosphere of ammonia gas and hydrogen, the catalyst is raney nickel and / or raney cobalt, and the reaction substrate is 2, 5-furandicarboxylic acid. The method disclosed by the invention is short in process flow, free of highly toxic intermediate products, low in production cost, high in production efficiency, high in product selectivity and easy to industrialize.