199 results about "Butane" patented technology

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 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.

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 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.

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.

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 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.

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.

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.

The application is a kind of low water absorption and high heat distortion temperature copolymer nylon resin, which comprises the following components in weight percentage: 98% to 99.8% of nylon salt; 0.1% to 1% of end-capping agent; and 0.1% to 1% of hindered phenol monomer. The nylon salt comprises 60% to 80% of nylon 66 salt and 20% to 40% of nylon 6T salt. The end-capping agent is glycidyl ether containing silane and / or siloxane structure. The hindered phenol monomer comprises one or more of N,N'-bis-(3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionyl)hexanediamine, 4,4'-butylidenebis(6-tert-butyl-3-methylphenol), and tris(2-methyl-4-hydroxy-5-tert-butylphenyl)butane. The product of the application can meet the production requirements of differentiated copolymer nylon and has universal applicability. Without adding filling materials such as fiber, kaolin, talc, etc., the water absorption can be significantly reduced, the melting point and heat distortion temperature can be increased, and the inherent properties of nylon 66 resin are not affected.

The invention relates to a natural latex / graphene aerogel composite material for oil-water separation and a preparation method thereof. The preparation method comprises the following steps: firstly, preparing graphene oxide by an improved Hummers method, and then preparing the natural latex / graphene aerogel by combining a hydrothermal self-assembly method, a bubble template method and a freeze-drying method. And then adjusting the use amount of the natural latex and process parameters to optimize the performance of the natural latex / graphene aerogel, thereby preparing the natural latex / graphene aerogel with optimal performance. The preparation method has the beneficial effects that the problem of oil-water separation performance is solved, excellent adsorption performance is shown on organic reagents (ethanol, n-butane, liquid paraffin, trichloromethane, xylene, kerosene, edible oil, cyclohexane and the like), and the adsorption range is 43.82-189.86 g / g; after 10-20 times of cycle tests, the thickness recovery rate and the absorption capacity are still 92% or above of the initial value.

The invention relates to a vanadium phosphorus oxide catalyst and a preparation method and application thereof, the preparation method comprises the following steps: first roasting at least five metal salt-based eutectic solvents in an oxidizing gas atmosphere to obtain a high-entropy oxide; mechanically mixing the high-entropy oxide with a vanadium-phosphorus-oxide precursor, and then performing secondary roasting to obtain the vanadium-phosphorus-oxide catalyst, according to the preparation method, the high-entropy oxide and the vanadium-phosphorus-oxygen precursor are compounded to obtain the vanadium-phosphorus-oxygen catalyst with high catalytic activity, in the reaction of preparing maleic anhydride through catalytic oxidation of n-butane, high selectivity and yield of maleic anhydride are ensured while a high n-butane conversion rate is obtained, the n-butane conversion rate is preferably as high as 93.6% or above, and the yield of maleic anhydride is greatly improved. Meanwhile, the selectivity of the maleic anhydride is preferably as high as 62.6% or above, and the yield of the maleic anhydride is preferably as high as 61.0% or above; the preparation raw materials are wide in source, the preparation process is simple, cost is low, and industrial production is easy.

The utility model discloses a pressure detection device for an isobutane / n-butane raw material storage tank. The pressure detection device comprises a pressure detection unit, a signal processing module, a central control module, a display module, an alarm module and a protection module. The pressure detection unit adopts a main / standby piezoresistive pressure sensor and is installed at the top of the storage tank through a sealing joint, and an independent shielding signal line is sleeved with a metal corrugated pipe to prevent electromagnetic interference and mechanical damage. The signal processing module integrates signal amplification, filtering and analog-to-digital conversion functions and transmits processed data to the central control module. A microcontroller is arranged in the central control module, a pressure threshold value is preset, the main sensor and the standby sensor can be automatically switched, and encrypted data can be stored. The display module displays a pressure value and a curve in real time, and the alarm module realizes multi-level early warning through sound-light alarm and short message notification. Through double-sensor redundancy design, signal anti-interference processing, intelligent fault switching and multiple alarm mechanisms, the precision, stability and safety of pressure detection are remarkably improved.

The invention belongs to the technical field of caulking agents, and particularly relates to a polyurethane caulking agent and a preparation method thereof.The polyurethane caulking agent is prepared from, by mass, 35%-40% of siloxane modified dendritic polyether tetrahydric alcohol, 35%-40% of diphenylmethane diisocyanate, 5%-10% of plasticizer chlorinated paraffin, 3%-4% of 2-phenyl-5-trifluoromethyl-1, 3-oxazolidine latent curing agent, 1%-2% of foam stabilizer and 1%-2% of catalyst 2. 0.5-0.8% of 2, 2 '-dimorpholinyl diethyl ether, 5-8% of dimethyl ether and 5-8% of propane and butane. According to the polyurethane joint mixture, the 2-phenyl-5-trifluoromethyl-1, 3-oxazolidine latent curing agent is added, in the curing process, the latent curing agent reacts with water in advance of the diphenylmethane diisocyanate to form an amine substance, amido in the amine substance reacts with the diphenylmethane diisocyanate to generate a macromolecular polymer, curing of the polyurethane joint mixture is achieved, and the polyurethane joint mixture has the advantages that the curing effect is good; the curing time can be shortened, and the construction speed is increased.

The application discloses a pyrrole polymer electrolyte film in an energy storage lithium battery and a preparation method and application thereof, and belongs to the polymer electrolyte field. The method comprises the following steps: reacting 1-methyl pyrrolidine and bromine n-butane to prepare 1-methyl-1-butyl pyrrolidine bromide; preparing 1-methyl-1-butyl pyrrolidine difluoromethane sulfonimide salt ionic liquid by mixing the 1-methyl-1-butyl pyrrolidine bromide and lithium difluoromethane sulfonimide; mixing 1-methyl-1-butyl pyrrolidine difluoromethane sulfonimide salt ionic liquid, polyethylene glycol methyl ether methacrylate, acrylonitrile, lithium bistrifluoromethanesulfonimide, divinylbenzene and benzoin ethyl ether uniformly, coating and curing to obtain a pyrrole ionic liquid polymer electrolyte film. The application combines the molecular configuration of the pyrrolidine-based ionic liquid and the topological structure of the polymer network, realizes triple optimization of ion transmission-mechanical strength-interface stability.

This application discloses a method for the conversion of C4-C6 alkanes. In a reactor, a raw material containing hydrogen and C4-C6 alkanes is contacted with a catalyst and reacted to obtain a product containing small molecule hydrocarbons; the C4-C6 alkanes are selected from at least one of n-butane, isobutane, n-pentane, isopentane, and 2,3-dimethylbutane; the small molecule hydrocarbons are selected from at least one of ethane, propane, n-butane, and n-pentane; the catalyst is prepared by the following steps: (1) mixing clay and sol, spray drying to obtain microspheres with a diameter of 1-50 μm; (2) immersing the microspheres in an aqueous solution containing a noble metal precursor, drying I, calcining I, and treating with a hydrogen atmosphere to obtain a catalyst precursor; (3) mixing the catalyst precursor, molecular sieve, and additives, rolling to form spheres, drying II, calcining II, and reducing to obtain the catalyst.

This invention provides an intelligent control system and method for the production of tert-butane without catalytic reduction, belonging to the field of tert-butane production control. The intelligent control system includes a host computer and sensing and execution mechanisms electrically connected to the host computer. The sensing mechanisms include a TDLAS analyzer installed at the top outlet of the reactive distillation column, NIR analyzers installed at the tert-butanol inlet of the mixing preheater and the side outlet of the reactive distillation column, temperature sensors installed at the top, bottom, and side outlet of the reactive distillation column, flow meters installed at the feed inlet, top outlet, and reflux inlet of the reactive distillation column, and multiple pressure sensors spaced at equal intervals along the height of the reaction section. The execution mechanisms include electrically operated regulating valves installed at the feed inlet and reflux inlet of the reactive distillation column. The control system integrates multiple sensors and execution mechanisms, enabling closed-loop intelligent control of the entire process.

The invention relates to the technical field of chemical energy conservation, in particular to an alkylate rectification system and method.The system comprises a deisobutanizer and an n-butanizer, a tower top outlet of the deisobutanizer is connected with an isobutane extraction pipeline, a tower bottom outlet of the deisobutanizer is connected with the upper middle section of the n-butanizer, and a tower bottom outlet of the n-butanizer is connected with the lower middle section of the n-butanizer. A tower bottom outlet of the n-butane removal tower is connected with an alkylate oil extraction pipeline; a tower top outlet of the n-butane removal tower is connected with an inlet of the compressor, a heat source inlet of the first multi-stage heat supplier at the middle and lower sections of the isobutane removal tower is connected with an outlet of the compressor, a heat source outlet of the first multi-stage heat supplier is connected with an inlet of the pressure release valve, and an outlet of the pressure release valve is respectively connected with a tower top inlet of the n-butane removal tower and an n-butane extraction pipeline. The steam at the top of the n-butane removal tower is recompressed to be used for heat supply of the isobutane removal tower, low-grade energy can be converted into high-grade energy, heat distribution in the isobutane removal tower is optimized, consumption of the high-grade energy is reduced, and energy saving is achieved.

The invention discloses an efficient synthesis method of brexpiprazole, which comprises the following steps: taking 4-bromo-benzothiophene and N-Boc-piperazine as initial raw materials, under the protection of nitrogen, carrying out reaction by using a supported catalyst to prepare 4-Boc piperazine benzothiophene, and then carrying out acidolysis to obtain 4-piperazine benzothiophene hydrochloride; the method comprises the following steps: reacting 3, 4-dihydro-7-hydroxy-2 (1H) quinolinone with 1-bromo-4-chloro-butane to generate 3, 4-dihydro-7-(4-chlorobutoxy)-2 (1H)-quinolinone, and then converting the 3, 4-dihydro-7-(4-chlorobutoxy)-2 (1H)-quinolinone into 7-(4-chlorobutoxy)-2 (1H)-quinolinone; then condensing with 4-piperazine benzothiophene hydrochloride to obtain a crude product of brexpiprazole; and finally, crystallizing and purifying for multiple times to obtain high-purity brexpiprazole. According to the preparation method disclosed by the invention, 4-bromo-benzothiophene and N-Boc-piperazine are taken as starting raw materials, and high-purity brexpiprazole is prepared by optimizing selection of a catalyst and conditions of each step and through an excellent purification process.

The invention discloses an alpha-fluoro alpha, beta-unsaturated amide derivative as well as a synthesis method and application thereof. The preparation method comprises the following steps: by taking amyl-1, 1, 2-trifluoro-1, 4-diene which is simple and convenient to prepare and a cheap and abundant amine compound as raw materials, an allyl palladium chloride dimer as a transition metal catalyst, 1, 4-bis (diphenylphosphine) butane as a ligand and 2, 5-di-tert-butylbenzoquinone as an oxidant, reacting in an organic solvent at a proper temperature under a nitrogen condition, thereby obtaining the 1, 1, 2-trifluoro-1, 4-diene compound. The alpha-fluoro alpha, beta-unsaturated amide derivative is obtained with good yield, and the structural formula of the derivative is shown in the specification. The synthesis method disclosed by the invention has the characteristics of simplicity and convenience in operation, mild conditions, greenness, economy, wide substrate compatibility, high chemical selectivity and high regioselectivity, and solves the technical problem that the synthesis conditions of the alpha-fluoro-alpha, beta-unsaturated amide derivative are complicated and harsh. Meanwhile, the alpha-fluoro drug molecules can be efficiently and highly selectively obtained, and the method has a wide application prospect.

The invention belongs to the technical field of wool fabrics, and particularly relates to an antistatic easy-care worsted wool fabric and a preparation method thereof. The fabric is formed by blending high-count wool fibers and conductive fibers and is treated by a composite finishing agent, the composite finishing agent comprises 5-10 parts of a reactive antistatic agent, 3-6 parts of butanetetracarboxylic acid, 1-3 parts of a penetrant and 80-90 parts of deionized water. The preparation method of the fabric comprises the steps of fiber blending, weaving, wool washing and milling, composite finishing agent dipping, water washing and baking. Through the synergistic effect of conductive fiber blending and the composite finishing agent, a stable covalent cross-linked network is constructed in the fibers and among the fibers, so that the fabric has excellent antistatic property, anti-dust property, washing size stability and wrinkle resistance at the same time, the effect is lasting, and the fabric is worthy of popularization and application. The technical problems that worsted wool fabric is prone to being stained with wool ash and prone to felting after being washed with water are solved.

The present application relates to the field of catalyst preparation, and discloses a vanadium phosphorus oxygen catalyst, a preparation method and application thereof, wherein the content of pyrophosphoric vanadyl oxide phase in the crystal phase structure of the vanadium phosphorus oxygen catalyst is 80-99.9wt%. The vanadium phosphorus oxygen catalyst provided by the present application has high active phase content, large specific surface area and large average pore size, and has good catalytic performance in the reaction of preparing maleic anhydride from n-butane oxidation, and can significantly improve the conversion rate of n-butane and the yield of maleic anhydride.

The invention belongs to the technical field of metal surface treatment materials, and particularly relates to an environment-friendly phosphorus-free high-adhesion silane ceramic film forming agent and application thereof. The potassium fluozirconate is subjected to electrochemical reaction on the metal surface to form skeleton particles and provide a basic physical barrier and corrosion resistance, the molybdate promotes metal oxidation and film formation, and the silane coupling agent provides a three-dimensional network structure and has a synergistic effect with the potassium fluozirconate and the sodium molybdate, so that the corrosion resistance and the adhesive force of the formed ceramic film can be effectively improved, and the corrosion resistance and the adhesive force of the ceramic film are improved. And fluotitanic acid is hydrolyzed to form an inorganic network structure, metal surface micropores are covered, passivation film growth is accelerated, phosphonobutane tricarboxylic acid and polyacrylic acid are added to form an organic-inorganic hybrid film, inorganic film microcracks are filled, the flexibility and adhesive force of the ceramic film are improved, and the service life of the ceramic film is prolonged. The film-forming agent is relatively simple in vitrification process for the metal surface, washing-free treatment can be selected after vitrification, only the PH value needs to be controlled in tank liquor control, and the film-forming agent can be suitable for various metal materials.

The present invention is characterized by being a novel sulforaphane derivative comprising a complex of sulforaphane (1-isothiocyanato-4-[methylsulfinyl]butane (SFN)) and cysteine persulfide (CysSnH, n=2, 3, 4, or 5) or glutathione persulfide (GSnH or GSnG, n=2, 3, 4, or 5).