368 results about "Butane" patented technology

The invention relates to the technical field of epoxy resin, in particular to self-repairing epoxy resin and a preparation method thereof. The self-repairing epoxy resin is prepared from the following raw materials in parts by mass: 80 to 120 parts of bisphenol A type epoxy resin, 20 to 40 parts of bisphenol F type epoxy resin, 5 to 15 parts of 1, 6-hexanediol diglycidyl ether, 1 to 3 parts of 3, 5-dimethylphenylboronic acid, 1 to 5 parts of furyl maleimide, 10 to 20 parts of dodecanedioic acid, 5 to 15 parts of butanetetracarboxylic acid, 1 to 3 parts of catalyst, 10 to 15 parts of nano silicon dioxide, 1 to 2 parts of boron nitride nanosheet and 1 to 2 parts of hyperbranched polyamidoamine. The curing agent is prepared from the following components in parts by weight: 20-30 parts of epoxy resin, 1-2 parts of sulfydryl-terminated polysiloxane, 20-30 parts of amine curing agent, 5-15 parts of reinforcing filler and 0.5 According to the invention, the balance among self-repairing capability, mechanical property and heat resistance is successfully realized; in the microcrack propagation process, fracture and recombination mechanisms of dynamic covalent bonds effectively prevent further propagation of cracks.

The invention relates to the technical field of automobile air purification, and particularly discloses a filtering material, a preparation method of the filtering material and a novel automobile air conditioner multi-effect catalytic formaldehyde removal filter. The filtering material comprises a PET (Polyethylene Terephthalate) supporting layer, a gas filtering layer and a PP (Polypropylene) electrostatic filtering layer which are arranged in sequence, the gas filtering layer is prepared from the following raw materials in parts by weight: 30 to 90 parts of activated carbon and 10 to 70 parts of manganese catalyst. The gas filtering layer composed of the activated carbon and the manganese catalyst is matched with the filtering material composed of the PET supporting layer and the PP electrostatic filtering layer, four gases of n-butane, methylbenzene, sulfur dioxide and nitrogen dioxide can be adsorbed, the manganese catalyst degrades formaldehyde at normal temperature, meanwhile, the reaction on the formaldehyde is a catalytic reaction, and the environment-friendly effect is achieved. Therefore, the filter material disclosed by the invention also has longer service life, so that a filter made of the filter material has a better formaldehyde removal effect and longer service life.

The invention provides a low-temperature electrolyte, a preparation method thereof and a lithium battery, and relates to the technical field of lithium batteries. The method provided by the invention comprises the following steps: adding a lithium salt and an electrolyte additive into an organic solvent, stirring and dissolving to obtain a low-temperature electrolyte; and the electrolyte additive comprises at least one of lithium nonafluoro-1-butane sulfonate, potassium bis (nonafluoro-1-butane sulfonimide) and potassium perfluorobutanesulfonate. The low-temperature electrolyte can effectively improve the ionic conductivity of the lithium battery, optimizes an SEI film and a CEI film on the surface of an electrode to inhibit the growth of lithium dendrites and the decomposition of the electrolyte, and reduces the energy barrier of lithium ions in the desolvation process during transmission to improve the capacity retention ratio of the lithium battery at low temperature.

The invention provides a post-added nanocellulose enhancing auxiliary agent for latex paint coating and a preparation method and a use method thereof, and the preparation method comprises the following steps: mixing, stirring and heating butanetetracarboxylic acid, sodium hypophosphite and a nanocellulose solution to obtain an esterified nanocellulose solution; adding a silane coupling agent solution into the esterified nanocellulose solution to obtain a modified nanocellulose solution; dispersing nano silicon dioxide into absolute ethyl alcohol to obtain silicon dioxide dispersion liquid; adding a silane coupling agent solution into the silicon dioxide dispersion liquid, mixing, stirring and heating for reaction to obtain modified silicon dioxide powder; dispersing the modified silicon dioxide powder into absolute ethyl alcohol to obtain modified silicon dioxide dispersion liquid; adding the compound emulsifier solution into the modified silicon dioxide dispersion liquid, and shearing and emulsifying to obtain modified silicon dioxide emulsion; and adding a compatilizer into the modified nano cellulose solution, dropwise adding the modified silicon dioxide emulsion, and finally adjusting the viscosity.

The invention belongs to the field of water washing towers, and particularly relates to a multi-stage water washing system for butane dehydrogenation purification, the multi-stage water washing system comprises a tower body, a plurality of groups of filler assemblies and a plurality of groups of spraying assemblies are arranged in the tower body from top to bottom in a staggered manner, and each filler assembly comprises a fixed ring plate I fixedly arranged on the inner wall of the tower body; three packing layer plates which are stacked up and down are arranged at the center position of the first fixing ring plate, two sets of first driving assemblies which are symmetrical about the circle center of the first fixing ring plate are arranged on the first fixing ring plate, the first driving assemblies are connected with the upper packing layer plate and the lower packing layer plate in the packing assemblies, and second driving assemblies are jointly arranged between the first driving assemblies and the corresponding first fixing ring plate; the second driving assembly is connected with the middle packing layer plate. The packing layer is divided, the spraying frame is adjustable, the cleaning effect and convenience are improved, rapid cleaning can be achieved, the production efficiency is improved, the cost is reduced, impurities are efficiently removed, a catalyst is protected, the service life of equipment is prolonged, and the device is reasonable in structure and easy to implement.

The invention discloses a continuous foaming composite process for a pearl wool coiled material and a waste gas recovery system thereof, and belongs to the technical field of pearl wool processing. Aiming at the problems of low efficiency and waste gas pollution of a traditional intermittent process, the process realizes continuous production through raw material selection (the melt index of LDPE is 1.0-2.5 g / 10min), drying and mixing pretreatment, melting and plasticizing through a twin-screw extruder, injection of foaming agents such as butane under the pressure of 8-12MPa, extrusion foaming at a die head of 140-160 DEG C and combination of air-cooling and water-cooling shaping. The compounding link comprises multiple processes such as hot pressing and co-extrusion to adapt to different base materials, after-treatment is conducted through trimming, taper tension coiling and standing stress release, the product density fluctuation is + / -3%, and the peel strength is larger than or equal to 3 N / cm. According to the waste gas recovery system, negative pressure collection is conducted through a closed gas collecting hood, indirect cooling and alkali liquor spraying pretreatment are conducted, activated carbon adsorption concentration and catalytic combustion purification are conducted, the VOCs removal rate is larger than or equal to 98%, the emission concentration is smaller than or equal to 50 mg / m < 3 >, and efficient production and environmental protection benefits are achieved.

The invention belongs to the technical field of organic synthesis, and particularly relates to a catalyst-free continuous production method of chlorotert-butane, which comprises the following steps: adding diluted hydrochloric acid as a starting solution into the tower kettle of a reactive distillation tower, and heating the tower kettle to boil until reflux exists at the tower top; the method comprises the following steps: adding tert-butyl alcohol and concentrated hydrochloric acid into a mixing preheater for preheating, then continuously feeding from a feed port of a reactive distillation tower until the tower top temperature is 45-48 DEG C, the side discharge port temperature is 50-52 DEG C and the tower kettle temperature is 96-105 DEG C, and carrying out reflux according to a reflux ratio of (1.5-3): 1; and continuously extracting crude chlorinated tert-butane from a side discharge port of the tower, cooling, neutralizing, drying and filtering to obtain the chlorinated tert-butane. According to the invention, through the integrated design of the mixing preheater and the reactive distillation column, especially by utilizing the reactive distillation technology to continuously remove the product, the chemical equilibrium limitation of the traditional intermittent process is successfully broken, the raw material conversion rate is obviously improved, and meanwhile, the green production targets of flow simplification, energy consumption reduction and three-waste emission reduction are realized.

Catalysts that include a first zeolite selected from ZSM-5 and Y zeolite impregnated with P2O5 and a second zeolite different from the first zeolite selected from ZSM-5 and Y zeolite impregnated with La2O3. The catalysts can also include alumina, clay, and silica. The catalysts can be used to crack vacuum gas oil (VGO) into gasoline and butylenes. The catalysts can crack VGO with relatively good selectivity for butylenes over butanes.

The invention discloses a limestone-gypsum wet flue gas desulfurization composite synergist and a preparation method thereof, and relates to the technical field of flue gas desulfurization. The limestone-gypsum wet flue gas desulfurization composite synergist is prepared from the following raw materials in parts by weight: 15 to 18 parts of organic acid, 5 to 8 parts of oxidation catalyst, 8 to 10 parts of sodium salt, 5 to 10 parts of magnesium salt, 12 to 15 parts of surfactant, 5 to 8 parts of organic acid alkali metal salt and 4 to 5 parts of dispersing agent. The preparation method comprises the following steps: reacting 2-dodecene-1-yl succinic anhydride with N, N-dimethyl ethylenediamine to generate a monoamide compound, reacting the monoamide compound with epoxy chloropropane to generate a quaternary ammonium salt compound, and reacting the quaternary ammonium salt compound with sodium sulfanilate to generate the surfactant. The limestone-gypsum wet flue gas desulfurization composite synergist prepared by the invention can promote dissolution of calcium carbonate, and shows good desulfurization efficiency.

The invention discloses flax olive oil for improving, preventing and treating cardiovascular diseases, and belongs to the technical field of grease. The flax olive oil for improving, preventing and treating cardiovascular diseases mainly comprises the following raw material components: olive oil and flaxseed oil, and the mass ratio of the olive oil to the flaxseed oil is (1.5-2.5): 1. Wherein the flaxseed oil is obtained by screening flaxseeds, removing impurities, removing abnormal grains, crushing, extracting for multiple times by adopting a mixed extraction agent, degumming, decolorizing and deodorizing, the extraction temperature is 20-25 DEG C, the liquid-solid ratio is (9-10): 1mL / g, the single extraction time is 35-45 minutes, and the pressure of an extraction tank is 0.30-0.40 MPa; the mixed extraction agent is prepared from the following components in percentage by mass: 18.8 to 37.7 percent of ethanol, 29.7 to 30.4 percent of n-butane, 19.7 to 38.5 percent of dimethyl ether and 12.4 to 12.9 percent of water.

The application belongs to the field of organic synthesis, and particularly relates to a synthesis method of 2-(3,3-dimethylbutyl)pyridine. 2-vinylpyridine, brominated tertiary butane, a mixed solution of dimethyl ether and isopropyl ether as a reaction system solvent, nickel iodide as a nickel salt, bipyridine as a ligand, dicyclohexylmethylamine as a base in the system, 2,6-dimethyl-3,5-diethyl-1,4-dihydropyridine as a reducing agent, a photocatalyst 2,4,5,6-tetrakis(9 ‑ Carbazole) - m-phenylenedinitrile, under the condition of room temperature and nitrogen atmosphere, a reduction cross-coupling reaction is used to synthesize 2-(3,3-dimethylbutyl)pyridine. The application uses inexpensive nickel metal as a catalyst, constructs a cross-coupling reaction of carbon-carbon bond, and has the advantages of mild reaction condition, high economy and the like.

To provide an engine starting device that has a simple configuration and reduces fuel consumption when starting the engine. [Solution] A starting device 100 for engine E that starts with butane gas 3 and operates normally with kerosene 4, comprising a vacuum valve 8 configured to supply butane gas 3, a carburetor 5 configured to supply kerosene 4, a throttle SV provided on the carburetor 5, and a control device, wherein when starting engine E, the control device controls the opening S of the throttle SV of engine E to opening S1 so that the intake vacuum of engine E acts on the vacuum valve 8 to supply butane gas 3 to engine E, and kerosene 4 is not supplied to the carburetor 5 of engine E, and only butane gas 3 is supplied to the intake pipe 6 of engine E, thereby starting engine E.

The application provides a kind of load exosome composite hydrogel and preparation method thereof, belong to biomaterial and drug delivery technical field;Its preparation method includes: modified chitosan;Modified hyaluronic acid;Preparation of biphasic calcium phosphate nanoparticles;Preparation of composite hydrogel.The application is through nucleophilic ring-opening reaction of 1,2-epoxy butane and the hydroxyl group of chitosan, form hydroxybutyl ether bond, give hydroxybutyl chitosan temperature sensitive characteristics, then, again, after activation 3,4-dihydroxyphenylalanine is condensed with hydroxybutyl chitosan, form amide bond, to graft 3,4-dihydroxyphenylalanine on hydroxybutyl chitosan, after modification of chitosan, 3,4-dihydroxyphenylalanine can form strong adhesion interface with cartilage, synovial membrane and other tissues through hydrogen bond, pi-pi stacking and metal coordination, thereby effectively prolonging the residence time of hydrogel in joint.

The invention discloses a production method of petroleum-based tetrahydrothiophene, and belongs to the technical field of fine chemicals. Liquid sulfur and hydrogen in the stone chemical engineering process are used as raw materials to synthesize hydrogen sulfide, meanwhile, butane in the stone chemical engineering process is subjected to air oxidation to prepare maleic anhydride, the maleic anhydride is used as a raw material and subjected to a catalytic reaction with hydrogen to synthesize tetrahydrofuran and gamma-butyrolactone, and tetrahydrofuran and hydrogen sulfide are subjected to a catalytic reaction to synthesize tetrahydrothiophene. Compared with a direct catalysis process adopting tetrahydrofuran and hydrogen sulfide, the process has the advantages that the variety of high value-added products is various, the production cost is low, the safety of the production process is high, and the petroleum-based fine chemical industry chain is extended.

The present application provides a shaped catalyst for selective oxidation of n-butane and a preparation method thereof. The shaped catalyst comprises an active component and a hydroxyl silicate, wherein the active component comprises vanadium phosphorus oxide. The present application also provides a method for preparing maleic anhydride by using the catalyst. In the preparation process of the catalyst, the hydroxyl silicate is added as a lubricant and a reinforcing agent, the mechanical strength of the shaped body of the catalyst after the hole expansion treatment is improved, various shaped bodies with stable structures are obtained, and the selective oxidation of n-butane can produce valuable products with high selectivity.

A process for separating 1-butene from a C4 raffinate gas composition includes introducing the C4 raffinate gas composition to a reactor containing an adsorbent material and passing the C4 raffinate gas composition through the adsorbent material; adsorbing the 1-butene from the C4 raffinate gas composition onto the adsorbent material to separate the 1-butene from the C4 raffinate gas composition and form a residue gas composition; and desorbing the 1-butene by heating the adsorbent material after the adsorbing to form the 1-butene and regenerate the adsorbent material. The adsorbent material is at least one of a zeolite adsorbent and an alkali-modified zeolite adsorbent having at least 99% by weight selective towards 1-butene for adsorption in comparison to iso-butene and iso-butane.

The invention relates to a combined inhibitor for reverse flotation magnesium removal of medium-low grade phosphorite and application thereof. The combined inhibitor comprises sodium sulfate, 1, 2, 4-butanetricarboxylic acid and sulfuric acid. The application method comprises the following steps: grinding raw ore, adding water and mixing to obtain ore pulp; the pH of the ore pulp is adjusted, then the combined inhibitor is sequentially added and mixed, then a collecting agent is added and mixed, flotation is conducted, and phosphate concentrate and phosphate tailings are obtained; the flotation process comprises one-time rough flotation, at least one-time fine flotation and at least one-time scavenging; the combined inhibitor provided by the invention is good in calcium and magnesium interference resistance and high in selectivity, the dosage of sulfuric acid is remarkably reduced, the pH value of ore pulp is increased, magnesian gangue in phosphorite is effectively removed through the synergistic effect of all the components, the grade of phosphate concentrate is increased, meanwhile, the recovery rate is high, and the combined inhibitor has good industrial application prospects.

The invention discloses a chiral 1, 4-diazabicyclo [3.1. 1] heptane derivative as well as a synthesis method and application of the chiral 1, 4-diazabicyclo [3.1. 1] heptane derivative. According to the invention, a 1-azabicyclo [1.1. 0] butane derivative is taken as a raw material, under the catalytic action of a chiral iridium complex, the 1-azabicyclo [1.1. 1] butane derivative and an N-allyl carbonate derivative are subjected to [3 + 2] cycloaddition reaction, a series of chiral 1, 4-diazabicyclo [3.1. 1] heptane skeletons with diversified structures are constructed with high stereoselectivity, and the obtained product has the potential of further derivatization. The method has the advantages of easily available raw materials, mild reaction conditions, simplicity and convenience in operation, good functional group compatibility and the like.

1. Name of the designed product: adapter for gas nozzle (butane). 2. Use of the designed product: adapter for gas nozzle. 3. Design points of the designed product: in shape. 4. Picture or photo best indicating the design points: perspective view 1.

The invention discloses a portable butane gas stove safety device for preventing oversized vessels from being used, comprising a stove body, a burning end being provided on one side of the stove body, a placing end being provided on the other side of the stove body, a valve being installed in the placing end, an igniter being installed on the valve, a bottle being placed in the placing end, a side plate being provided at the connection between the placing end and the burning end, a limiting plate being slidably installed on one side of the side plate, one end of the limiting plate being provided with an abutting plate abutting the bottom of the bottle body, the bottle mouth of the bottle body abutting the valve, an operating panel being installed on the side plate, the operating panel comprising a movable part hingedly mounted on the side plate, a movable groove inclined longitudinally forwardly being provided at the rear end of the movable part, the other end of the limiting plate being movably mounted in the movable groove, a pressing part being formed at the front end of the movable part, and an ejecting part being protruding from the top surface of the stove body at the rear end. When in use, the bottom end of the oversized vessel presses the ejecting part downwards, driving the limiting plate to slide backwards along the side plate, so that the bottle body is separated from the valve, thereby realizing the bottle being taken off and directly cutting off the combustion.

Systems and methods for processing a C3 and C4 hydrocarbon mixture have been disclosed. The C3 and C4 hydrocarbon mixture is first processed in an isomerization unit to isomerize n-butane to form isobutane. The resulting effluent stream from the isomerization unit comprising primarily isobutane and C3 hydrocarbons, collectively, is flowed into a separation unit configured to separate the effluent stream to form a C3 stream comprising C1 to C3 hydrocarbons and a C4 stream comprising primarily isobutane. The isobutane in the C4 stream is further dehydrogenated to form isobutene, which is further flowed into an MTBE synthesis unit as a feedstock for producing MTBE.

This invention discloses a method for the efficient conversion of isoparaffins, comprising the following steps: contacting a raw material containing isoparaffins and hydrogen with a catalyst in a reactor, reacting to obtain a product containing small molecule alkanes; wherein the isoparaffins are selected from at least one of isobutane, isopentane, neopentane, isohexane, and 3-methylpentane; wherein the small molecule alkanes are selected from at least one of ethane, propane, and n-butane; the catalyst is obtained by the following steps: mixing a metal acidic functional component, a metal basic functional component, a matrix precursor, a phosphorus auxiliary component precursor, a molding aid, and water, kneading, molding, and vacuum drying to obtain the catalyst.

The utility model provides a convenient-to-use baking and instant-boiling integrated portable gas stove, which belongs to the technical field of portable gas stoves, and comprises a shell, a connecting seat, a gas storage tank, a gas storage tank and a gas storage tank, the tank withdrawing structure comprises a fixed frame fixed on one side in the shell, a push plate arranged on one side of the transmission assembly, a push ring fixed on one side of the push plate and arranged on the outer side of the butane tank in a sleeving manner, a second furnace end nozzle fixed in the shell, and a baffle ring fixed in the shell. According to the device, the push arm is driven by pressing the pressing rod to push the butane tank to move towards the upper right through the push ring, the butane tank is disassembled, the push arm can be reset through the reset spring, and therefore the function of easily withdrawing the tank of the device is achieved, a user does not need too much effort or skills when replacing the gas tank, the operation process is greatly simplified, and the use efficiency is improved; and meanwhile, potential safety hazards caused by misoperation of a user in the tank withdrawing process can be reduced.

The application discloses a method for producing ethylene raw material. The method comprises the following steps: mixing hydrocracking light naphtha and hydrogen into a first hydroconversion reaction zone to react, and then the reaction effluent enters a separation system to obtain hydrogen-rich gas and a first hydroconversion product; the first hydroconversion product is separated to obtain ethane, propane, isobutane, isopentane and n-pentane; the isobutane is mixed with hydrogen into a second hydroconversion reaction zone, and the reaction effluent is separated to obtain n-butane; the second hydroconversion reaction zone is filled with a hydroconversion catalyst containing ZSM-35 molecular sieve; and the isopentane is recycled to the inlet of the first hydroconversion reaction zone. The first hydroconversion reaction zone is filled with a hydroconversion catalyst containing mordenite, and at least two catalyst beds are filled; and the active metal content of the hydroconversion catalyst decreases in turn along the flow direction. The method can effectively improve the proportion of normal alkanes in the product and improve the quality of the ethylene raw material.

The application provides a device and method for producing succinic acid by oxidizing and hydrolyzing butane and / or benzene as raw materials, the device comprising: an oxidation separation system, a maleic anhydride hydrogenation separation system and a succinic anhydride hydrolysis system connected in series along the material flow direction; wherein butane and / or benzene and oxygen-containing gas are subjected to oxidation reaction in the oxidation separation system and separated to obtain maleic anhydride material; the maleic anhydride material enters the maleic anhydride hydrogenation separation system to perform hydrogenation reaction and is separated to obtain succinic anhydride; and the succinic anhydride enters the succinic anhydride hydrolysis system to perform hydrolysis and crystallization, thereby obtaining succinic acid product. The application provides a process for producing succinic acid from butane / benzene for enterprises with butane or benzene resources, and the application preferably adopts two-stage hydrogenation reactors and circulates part of the material at the outlet of the second reactor to the first reactor, so that the content of maleic anhydride in the first reaction feed can be effectively diluted and the reaction heat generated in the first reaction can be taken away due to the fact that the material does not contain maleic anhydride.

This application discloses a safe firing and sound-generating device for a prop gun used in film and television productions, relating to the field of film and television production. The device includes a gun casing with an internal combustion and explosion mechanism. This invention utilizes the combustion and explosion mechanism to control the proportion of gases from an oxygen cylinder and a butane cylinder to achieve a combustion and explosion effect. First, the power switch is turned on. The oxygen cylinder and butane cylinder, in a specific proportion, send gases through corresponding pipes to corresponding first, second, and third solenoid valves. Then, the first, second, and third solenoid valves send the gas through pipes to the combustion and explosion chamber, awaiting combustion and explosion. Pulling the trigger, under the action of the circuit board, controls the operation of the first solenoid valve, current converter, second solenoid valve, and third solenoid valve, causing the gas in the combustion and explosion chamber to ignite and explode, producing a certain amount of smoke. This device achieves the function of combustion and explosion, and the combustion and explosion effect can be continuous.

The invention discloses an intelligent process control system for a butane separation tower, belongs to the field of petrochemical process control, and aims to solve the problems of high energy consumption and weak interference resistance caused by poor loop collaboration and dependence on univariate adjustment in the control of the existing butane separation tower. The system comprises a sensing layer, a control layer and an execution layer, the sensing layer collects full-process physical parameters and material component data, the control layer achieves data processing, trend prediction and multivariable optimization adjustment through data collection processing, multivariable prediction control (MPC) and an intelligent coordination module, and the execution layer executes a flow adjustment instruction. Through multi-variable cooperation, dynamic energy consumption optimization and feed-forward adjustment, the product quality stability and the system anti-interference capability are improved, the energy consumption is reduced, the manual intervention is reduced, and accurate, efficient and low-consumption control of the butane separation tower is realized.

A process and apparatus for the production of maleic anhydride by reacting a mixed gas containing molecular oxygen and a hydrocarbon, usually n-butane, over a suitable catalyst, wherein the maleic anhydride is produced in a tubular catalytic reactor, wherein after recovery of the maleic anhydride product by absorption with an organic solvent and after appropriate treatment steps, the gaseous effluent from the reactor is recycled back to the inlet of the catalytic reactor by compression.

The invention relates to the field of materials, and discloses a low-temperature-resistant fluororubber heat-shrinkable sleeve and a preparation method thereof. The low-temperature-resistant fluororubber heat-shrinkable sleeve is prepared by taking fluororubber, an ethylene-ethyl acrylate copolymer, a nano magnesium hydroxide flame-retardant graft and an attapulgite graft as main raw materials and an antioxidant, a lubricant and the like as auxiliary materials through the processes of mixing, extrusion, irradiation, expansion and the like. Wherein the nano magnesium hydroxide flame-retardant graft is obtained by carrying out surface phosphorus-silicon modification on nano magnesium hydroxide by using triphenyl isocyanate thiophosphate and 2-amino-1-(butyldimethylsiloxy) butane, and has an efficient flame-retardant effect; the attapulgite graft is formed by grafting attapulgite to a polymer, agglomeration is prevented, the low-temperature resistance can be better exerted, and the finally prepared heat-shrinkable sleeve has low-temperature resistance and flame retardance.

The invention discloses a preparation method and application of 1, 4-bis (diphenylphosphine) butane platinum dichloride (II), and the preparation method comprises the following steps: (1) mixing absolute methanol and dichloromethane, carrying out deoxidation treatment, and adding 1, 4-bis (diphenylphosphine) butane into the mixture; (2) dissolving potassium chloroplatinite in distilled water, filtering insoluble impurities, dropwise adding the potassium chloroplatinite into the reaction system in the step (1) under the protection of inert gas while keeping a stirring state, and after dropwise adding, heating, refluxing and stirring for reaction; (3) carrying out filter pressing under the protection of inert gas, passing through a silica gel column, and collecting filtrate; (4) concentrating the filtrate, and then adding an organic solvent for pulping; and (5) carrying out filter pressing under the protection of inert gas, washing a filter cake, and carrying out vacuum drying. According to the preparation method, the product yield is high, the purity is high, and the obtained 1, 4-bis (diphenylphosphine) butane platinum dichloride (II) is used for hydrogenation reaction of carbonyl compounds and has good catalytic performance.