95 results about "Benzole" patented technology

This invention discloses a high-efficiency mixing device for materials in a benzoyl hydroxamic acid reactor, belonging to the field of material mixing and reaction technology. It includes a support base and a reactor body connected to it via a support frame. The upper end of the reactor body has a feed inlet, and the lower end has a discharge outlet. A valve for controlling the opening and closing of the discharge outlet is installed. A servo motor is mounted on the upper end of the reactor body via a motor frame, and a shaft tube is installed on the drive end of the servo motor. This invention not only achieves transverse stirring by synchronously rotating the shaft tube and the stirring tube, but also changes the radius of transverse stirring, thereby improving stirring efficiency. Furthermore, it achieves longitudinal stirring through the rotation of the gas-dispersing impeller, further enhancing stirring efficiency. Simultaneously, during the stirring process, an inert gas at a certain temperature can be introduced into the reactor, thereby changing the reaction temperature within the reactor and contributing to improving the efficiency and effectiveness of the benzoyl hydroxamic acid synthesis reaction.

The utility model discloses a rectification device for producing m-chlorobenzoyl chloride, which comprises a lower tower body, a support ring plate connected with the inner wall of the bottom of the lower tower body, a spring arranged at the top of the support ring plate, a movable ring plate connected with the top end of the spring and capable of sliding up and down along the inner wall of the lower tower body, and a tower plate, the two tower plates are mounted in the supporting annular plate and the movable annular plate, and the adjusting assembly is connected with the inner wall of the lower tower body, located above the movable annular plate and used for adjusting the distance between the two tower plates. According to the utility model, the shifting plate is shifted forwards or reversely, so that the middle tower body rotates synchronously, and the pressing rod is screwed out downwards or screwed in upwards under the transmission of the inner gear ring, the gear and the rotating rod, so that the distance between the two tower plates is controllable, the tower plates can adapt to process conditions with different loads, the separation effect of benzoyl chloride is ensured, the rectification effect is greatly enhanced, and the production efficiency is improved. Therefore, the production efficiency of the m-chlorobenzoyl chloride is indirectly improved.

This invention discloses a flame-retardant and anti-aging cable composite material and its preparation method, belonging to the field of cable material preparation technology. In this invention, a flame-retardant, high-temperature resistant polysiloxane containing double bonds, an anti-aging agent, and a flame-retardant filler are prepared and blended with raw materials such as EVA and low-density polyethylene. Irradiation causes cross-linking between the materials, endowing the composite material with heat resistance, aging resistance, and good mechanical properties. The anti-aging agent of this invention includes siloxane groups and benzophenone groups, possessing good resistance to both UV aging and heat aging, which is beneficial for further improving the anti-aging performance of the prepared cable composite material. The flame-retardant filler of this invention has urethane bonds grafted onto its surface, which matches the polarity of the EVA vinyl acetate segments, improving the compatibility between the flame-retardant filler and EVA, and further enhancing the flame retardancy of the prepared composite cable material.

A sulfur-containing aromatic acrylate compound, its preparation method, and its applications are disclosed. The compound has a structure as shown in general formula (A), which integrates acrylate, benzophenone, and thioether functional groups in its molecular structure, adapting to the application requirements of various optical material raw materials. This invention also provides an efficient preparation process for this compound. Optical materials prepared using this compound as a monomer exhibit excellent aging resistance and anti-yellowing properties, as well as outstanding mechanical properties. Wherein, R1=CH2=CH-COO; R2=CH3; n=2 or 3, m=0, 1, or 2.

The invention relates to the field of coatings, and discloses a high-temperature-resistant protective coating for an alloy surface and a preparation method of the high-temperature-resistant protective coating. The protective coating is prepared from waterborne epoxy resin, high-temperature-resistant filler, cardanol-based modified benzoxazine resin, a hyperbranched modifier, a curing agent and auxiliaries; according to the cardanol-based modified benzoxazine resin, paraformaldehyde is utilized to introduce an aldehyde group into a hydrogenated cardanol matrix to prepare a cardanol-based aldehyde-containing intermediate, then the cardanol-based aldehyde-containing intermediate reacts with 1, 5-naphthalene diamine, and then the cardanol-based aldehyde-containing intermediate reacts with gamma-aminopropyltriethoxysilane and paraformaldehyde through Mannich reaction to prepare the cardanol-based modified benzoxazine resin. The hyperbranched modifier is prepared by carrying out addition on 2, 4-dihydroxybenzophenone and isocyanatopropyltriethoxysilane, initiating hydrolytic condensation by utilizing a sol-gel method and then introducing triglycidyl isocyanurate to carry out a ring-opening reaction, and the protective coating prepared by the preparation method is strong in adhesive force, high in mechanical strength, good in wear resistance, good in wear resistance, good in wear resistance and good in wear resistance. Meanwhile, good corrosion resistance, high temperature resistance, ultraviolet aging resistance and flame retardance are achieved.

The invention belongs to the technical field of wolframite flotation tailing sedimentation, and particularly relates to a wolframite tailing pulp treatment method which comprises the following steps that when the temperature is larger than or equal to 10 DEG C, a polyaluminum chloride solution is prepared; when the temperature is greater than or equal to 15 DEG C, preparing a polyacrylamide solution; then adding the polyaluminum chloride solution into the wolframite tailing pulp with the benzhydroxamic acid concentration of (5 + x) mg / L, uniformly stirring, then adding the polyacrylamide solution, uniformly stirring, and then carrying out flocculating settling; wherein the adding amount of the polyaluminum chloride in each cubic meter of the wolframite tailing pulp is (150 + 10x) g, the adding amount of the polyacrylamide in each cubic meter of the wolframite tailing pulp is (70 + 2x) g, and x is more than or equal to 0 and less than or equal to 5. According to the technical scheme, the dosage of the flocculating agent can be effectively reduced, and the tailing pulp treatment cost is reduced; loss of wolframite metal products during recycling of overflow water is effectively reduced; the settling rate of suspended matters is obviously improved, the content of the suspended matters in the overflow water is effectively reduced, and the muddy flow of the thickening pool is avoided.

The invention relates to a casting type polyurethane elastomer vibration and noise reduction material for a railway elastic sleeper. Belongs to the technical field of polymer materials. The preparation raw materials are as follows: polyether polyol and diphenylmethane diisocyanate (MDI) or toluene diisocynate (TDI) are used as main reaction raw materials; micromolecular dihydric alcohol or diamine is used as a chain extender; a hindered phenol antioxidant or a phosphite ester antioxidant; a benzotriazole ultraviolet light absorber or a benzophenone ultraviolet light absorber; an organic silicon auxiliary agent; and a nano-scale inorganic filler. The material disclosed by the invention has excellent vibration and noise reduction performance, can meet the requirements that the rigidity range is 100-400KN / mm and the tensile strength is greater than 12MPa, and also has good anti-aging performance and anti-fatigue performance; the stability and the uniformity of the product quality are ensured; and rapid curing can be achieved, and the requirement for high efficiency of site construction is met.

The application discloses a preparation method of dibenzoyl peroxide, and relates to the technical field of organic peroxide preparation. The preparation method comprises the following steps: preparing dibenzoyl peroxide crude product and initial synthesis obtained recycling mother liquor; taking out two parts from the initial synthesis obtained recycling mother liquor, and reacting with a sodium hydroxide solution, hydrogen peroxide, a surfactant aqueous solution and benzoyl chloride; at least the benzoyl chloride is contained in the multiple materials, and the multiple materials are pre-mixed by a pre-mixer; heat preservation reaction is carried out, and after the reaction is completed, centrifugal separation is carried out to obtain the dibenzoyl peroxide crude product and second synthesis obtained recycling mother liquor; and the dibenzoyl peroxide crude product is sequentially subjected to water washing and solid-liquid separation to obtain a finished product. The pre-mixer is used to realize instant super-uniform mixing of the materials, the reaction is more uniform, the product is fine and small in particle size, the particle size distribution is uniform, the reaction yield is high, the amount of water used for subsequent washing is reduced, the recycling of the mother liquor reduces the discharge amount of high-salinity organic waste liquid from the source, and the preparation cost is reduced.

This invention discloses a method for preparing a series of bismaleimide products, relating to the field of high-performance thermosetting resin monomer synthesis technology. The method includes a pre-reaction of maleic anhydride and aromatic diamine at a molar ratio of 2.0–2.2:1 under nitrogen protection at 60–90°C. The resulting amic acid intermediate is pumped into a twin-screw extruder. Irradiation is performed in the vacuum dehydration ring-closing zone (or imidization zone) using a 365 nm UV LED array, coupled with a 0.3–1.0 wt% benzophenone / triethanolamine photoinitiator system. The ring-closing reaction is completed at 110±5°C and a vacuum of -0.090 to -0.098 MPa, with a total residence time of 30–90 seconds, yielding bismaleimide products with an acid value ≤0.1 mg KOH / g and a ring closure degree ≥98.5%. Rapid product switching for a series of products can be achieved by changing different aromatic diamines. This invention eliminates the use of organic solvents, reduces energy consumption by more than 55%, and has a batch-to-batch acid value variation coefficient of less than 2%, meeting the requirements of electronic-grade packaging materials. Furthermore, the process conditions are fundamentally different from existing technologies, demonstrating significant technological advancements.

The invention belongs to the field of superhigh-temperature ceramic materials, and particularly relates to a hafnium carbide precursor and a preparation method thereof.The preparation method comprises the steps that n-propyl alcohol hafnium and two special modified compounds are mixed in an inert atmosphere, dicumyl peroxide, benzophenone, triethanolamine and divinyl benzene are added for stirring, and the hafnium carbide precursor is obtained; adding tetrahydrofuran, stirring at a constant temperature to form a homogeneous solution, and finally filtering to obtain a precursor; the two modified compounds are vinyl tris (diethylamino) hafnium and acryloyloxy dibenzoyl hafnium complexes respectively, and the preparation method is realized through substitution reaction of hafnium tetrachloride and amine compounds and coordination reaction of n-propanol hafnium, dibenzoylmethane and acryloyl chloride respectively. The obtained hafnium carbide precursor contains a hafnium source, a modified compound, a cross-linking agent and a solvent, through molecular design, the ceramic yield is remarkably increased, the cracking temperature is reduced, the oxidation resistance and sintering density of final ceramic are improved, and the preparation method is suitable for preparing an ultra-high-temperature ceramic material.

The application relates to a preparation method of a mesotrione intermediate. S1, 3-chloro-2-methyl aniline, hydrochloric acid and pure water are placed in a reaction kettle, stirring, cooling, dropwise addition of a NaNO2 solution, after dropwise addition is completed, temperature control is carried out, CH3SNa aqueous solution is added, after dropwise addition is completed, slow temperature rising is carried out, and reaction is continuously carried out for 8 hours; extraction, water washing and distillation are sequentially carried out, and 1-chloro-2-methyl benzyl sulfide is obtained; S2, under the atmosphere of nitrogen, formylation reagent is added into a reaction kettle under the condition of 0-10 DEG C, a catalyst is dropwise added and stirring is carried out, 1-chloro-2-methyl benzyl sulfide is dropwise added, temperature rising is carried out, and 2-chloro-3-methyl-4-methylthio benzaldehyde is obtained through post-treatment; S3, under the atmosphere of nitrogen, methanol, 2-chloro-3-methyl-4-methylthio benzaldehyde and sodium tungstate dihydrate are added into a reaction kettle, hydrogen peroxide is dropwise added, the reaction temperature is controlled, and reaction is carried out, and the mesotrione intermediate is obtained through post-treatment.

The application belongs to the technical field of organic synthesis, and particularly relates to a preparation method of maropintan and an intermediate thereof. The preparation method comprises the following steps: S1: 3-quinuclidinone or a salt thereof is reacted with benzophenone under the condition of a base, a first solvent, to obtain 2-(diphenyl methylene) quinuclidin-3-one; S2: the obtained 2-(diphenyl methylene) quinuclidin-3-one is reacted with an amine source and hydrogen under the condition of a chiral ruthenium catalyst, an optional additive and a second solvent, to obtain an intermediate (2S, 3S)-2-diphenyl methyl quinuclidin-3-amine; and S3: the obtained (2S, 3S)-2-diphenyl methyl quinuclidin-3-amine is subjected to a condensation reaction with 5-tert-butyl-2-methoxy benzaldehyde (formula V) in the presence of an acid and a third solvent, and is reduced by palladium carbon or platinum carbon and hydrogen to obtain maropintan. The method has the advantages of low-cost and easily-available raw materials, a short synthesis route, high-yield one-step reaction of double chiral centers, good selectivity, simple process, high product yield and low cost.

The utility model discloses an intermediate material heating device for benzoyl chloride production, which comprises a water bath, and a first valve and a second valve are arranged at the side end of the water bath; the heating tank is communicated with the water bath, and a third valve is arranged between the heating tank and the water bath; the input end of the hot water circulating pump is communicated with the water bath, a fourth valve is arranged between the hot water circulating pump and the water bath, the output end of the hot water circulating pump is communicated with the heating tank, and a fifth valve is arranged between the hot water circulating pump and the heating tank. Through actual production test comparison, after water bath heating, the purity of the benzoyl chloride intermediate can be remarkably improved, for example, when steam heating is adopted originally, the product melting rate is stabilized at 80%, 20% is forced to be lost due to the reaction of hot water and materials, and the loss can be completely eradicated by melting materials at the same temperature after water bath heating.

The invention discloses a synthesis method of hydrogen isotope labeled vortioxetine. The synthesis method comprises four steps of reaction: construction of diaryl sulfide, selective deuteration of methyl, selective reduction of cyano and coupling reaction of carbon-nitrogen bonds. According to the key step, deuterated dimethyl sulfoxide is used as a deuterium source under the catalysis of a methyl selective deuterated alkali metal catalyst, and methyl deuterated dimethyl sulfoxide and a methyl benzene intermediate are selectively subjected to a methyl deuterated reaction. The method effectively avoids the harsh condition of low temperature for introducing a deuterated methyl scheme after aryl halogenated hydrocarbon lithium halide exchange and deuterated iodomethane reaction, avoids the generation of dehalogenation byproducts, and overcomes the defects that the product is difficult to purify, the reaction is difficult to amplify and produce and the like. The key step of the invention adopts a specific alkali metal salt as a catalyst to carry out methyl deuteration reaction, and combines cyanobenzene to selectively reduce and construct another methyl, so the method has the remarkable advantages of low cost, environmental protection, simple process and suitability for industrial production.

This invention relates to the field of organic synthesis technology, specifically a method for synthesizing 2-chloro-4-(1H-pyrazol-3-yl)benzonitrile and its application, comprising the following steps: S1. Compound 1a is added to a first organic solvent under inert gas protection and reacted with vinyl isobutyl ether under the conditions of a catalyst and potassium carbonate to obtain a system containing compound 2a; S2. The pH of the system containing compound 2a obtained in step S1 is adjusted to 2-3, and after reaction, compound 1 is obtained through post-treatment; S3. Compound 1 is added to a second organic solvent, and ethyl formate and sodium ethoxide are added to react and obtain a system containing compound 4a; S4. Acetic acid is added to the system containing compound 4a obtained in step S3 for neutralization, and under inert gas protection, hydrazine hydrate is added dropwise to react and the product is obtained through post-treatment. The synthesis method provided by this invention uses readily available raw materials, has a simple processing procedure, does not require column chromatography, simplifies the operation, and facilitates industrial-scale production.

The application discloses an anti-aging and yellowing-resistant foamed polyester material and a preparation method thereof, and relates to the technical field of polyester materials. The anti-aging and yellowing-resistant foamed polyester material is prepared from the following raw material components in proportion by weight: 3-5 parts of anti-ultraviolet SEBS, 3.6-7 parts of triethylamine, 4-6 parts of a flame-retardant and wear-resistant filler, 100 parts of TPEE, 0.9-1.1 parts of a polymer wax, and 0.6-0.8 parts of a foaming agent. The anti-ultraviolet SEBS is obtained by copolymerization grafting of an unsaturated benzophenone ultraviolet absorber, SEBS and maleic anhydride. The flame-retardant and wear-resistant filler is obtained by mixing and reacting carboxylated nano silicon dioxide, pentaerythritol and phosphorus oxychloride. The polymer wax is EVA wax. The foaming agent is azodicarbonamide. The anti-aging and yellowing-resistant foamed polyester material has good mechanical properties, anti-aging performance, flame-retardant performance and compression resistance.

The invention provides a preparation method of 4, 4 '-difluorobenzophenone, which comprises the following steps: uniformly mixing carbon tetrachloride and lewis acid, adding fluorobenzene in an inert gas atmosphere at-30-25 DEG C, stirring and reacting for 8-24 hours, and post-treating the obtained reaction liquid to obtain the 4, 4'-difluorobenzophenone, the method is simple in reaction process, mild in condition and convenient to operate, a high-risk strong oxidant is not needed in the whole reaction process, strong acid with strong irritation and corrosivity is prevented from being used, generation of pollution gas is reduced, the synthesis efficiency is high, and the total yield reaches up to 93%.

The present invention provides an improved process for the preparation of benzonitrile compounds More particularly, the present invention relates to an improved process for the preparation of benzonitrile compounds of Formula (I) by nitrilation of the corresponding benzotrichloride compounds of Formula (II).

This invention relates to the field of high-performance polypropylene materials technology, specifically to a biodegradable foamed polypropylene composite material and its preparation method. The invention aims to solve the problem of the inability to simultaneously achieve both mechanical and degradation performance in existing polypropylene composite materials. This invention uses modified polypropylene obtained by modifying polypropylene materials with high-density polyethylene and low-density polyethylene as the matrix material; maleic anhydride-grafted polypropylene as a compatibilizer; modified nano-silica; degradation aids obtained by melt extrusion of PBAT, ferric stearate, and benzophenone; and sulfonated lignin. Finally, a stepwise melt blending process is employed, combined with a dual foaming technology of chemical foaming agent and supercritical carbon dioxide, to obtain a polypropylene-based composite material. The resulting material exhibits excellent mechanical properties while possessing a highly efficient and controllable degradation rate, achieving a synergistic improvement in both mechanical and degradation performance.

The invention discloses a synthesis method of 2, 4, 5-trifluorophenylacetic acid, and belongs to the technical field of organic chemical industry, 1, 2, 4-trifluorobenzene is used as a raw material and reacts with tetrachloromethane and aluminum chloride passivated by pseudo-boehmite to generate 2, 4, 5-trifluoro-(trichloromethyl) benzene, after the reaction is finished, an oil phase is separated and extracted, a zinc chloride aqueous solution and 2, 4, 5-trifluoro-(trichloromethyl) benzene are dropwise added into the oil phase, a reaction is carried out, and the 2, 4, 5-trifluoro-(trichloromethyl) benzene is obtained. The preparation method comprises the following steps: hydrolyzing 2, 4, 5-trifluoro-(trichloromethyl) benzene to generate 2, 4, 5-trifluorobenzoyl chloride, then adding azido methane and silver oxide, and converting acyl chloride into carboxylic acid by utilizing an Ardt-Eister reaction to generate 2, 4, 5-trifluorophenylacetic acid; the synthesis route is simple to operate, the route is simplified, the use of high-toxicity raw materials in the intermediate process is reduced, the corrosion to equipment is low, the risk is low, the generation amount of byproducts is reduced, and the separation is easier, so that the synthesis route is a safer, environment-friendly and high-selectivity route for synthesizing the 2, 4, 5-trifluorophenylacetic acid.

The application discloses a novel photochromic metal-organic framework material and a preparation method and application thereof, and belongs to the technical field of inorganic-organic hybrid material synthesis. The chemical formula of the benzophenone metal-organic framework material is [Zn4(mu2-O)(mu3-O)(cdip)2(DMF)] n , the cell parameters are alpha=115.459(5)°, beta=93.033(4)° and gamma=91.808(4)°. The application further provides a preparation method of the benzophenone metal-organic framework material. The preparation method of the benzophenone metal-organic framework material is simple, and the material is responsive to ultraviolet light and X-ray irradiation; obvious color changes occur under ultraviolet light and X-ray irradiation. The printing and erasing process of the erasable inkless printing paper prepared based on the material is safe and pollution-free, and has good definition.

The invention relates to the technical field of organic afterglow materials, and discloses a pure organic room-temperature long-afterglow doped material and a preparation method thereof. The material comprises an object phosphorescent element and a subject powder matrix, benzophenone is used as a subject, benzophenone derivatives containing benzocarbazole are used as an object, and the subject-object eutectic compound is prepared through coprecipitation. According to the present invention, the room temperature phosphorescence phenomenon observed by naked eyes can be identified by using the different phosphorescence lifetime represented by different guest molecules in the host-guest eutectic compound, such that the idea is provided for information storage and encryption.

The invention discloses a resourceful treatment method of benzohydroxamic acid production wastewater, and relates to the technical field of resource recycling, in particular to the resourceful treatment method of the benzohydroxamic acid production wastewater, which comprises the following steps: adding alkaline resin into the benzohydroxamic acid production wastewater in a reaction tank; the method comprises the following steps: controlling the ratio of the addition amount of alkaline resin to the weight of the benzohydroxamic acid production wastewater to be 1: (3-10), then carrying out sufficient adsorption at 10-30 DEG C to obtain loaded resin and a residual water phase, and through the cooperative arrangement of a driving rod, a driven rod, a stirring rod, an extrusion push plate, an inclined jet orifice on a jet side plate, a baffle plate, a first spring and a second spring, removing the residual water phase from the jet side plate to obtain the benzohydroxamic acid production wastewater. When the stirring rod does circular motion along with the driven rod, the stirring blade plate rotates due to the reverse acting force generated when the stirring blade plate makes contact with a solution, local eddy currents are formed to break static liquid films on the surfaces of resin particles, mass transfer resistance is remarkably reduced, and the contact effect of resin and organic pollutants is enhanced.

The invention relates to the technical field of devitrification cooling, and discloses an ultrasonic-assisted benzohydroxamic acid rapid devitrification cooling device which comprises a cooling cover, a condensation pipe is mounted at the position, located at the lower edge of a mounting groove, in the cooling cover, first through holes are formed in the middle positions of the two sides of the inner wall of the cooling cover, and second through holes are formed in one sides of two baffles. During centralized cooling, air flow cooled by the condensation pipe can only be exhausted from the exhaust groove for centralized cooling, and when the number of high-temperature operation areas on the ultrasonic-assisted equipment is large, the air flow can only be exhausted through the second butt joint covers, hoses and the like, so that the high-temperature operation areas of the ultrasonic-assisted equipment are reduced, and the cooling efficiency is improved. And the electric push rod is started to push the baffle to communicate the first through hole with the first butt joint cover through the second through hole, low-temperature airflow of the cooling cover passes through the third butt joint cover, part of the low-temperature airflow is blown into other areas of the equipment, a devitrification cooling device does not need to be additionally installed, and the cooling and temperature control cost of the ultrasonic-assisted equipment is reduced.

This invention relates to the field of coating technology and discloses a method for preparing an anti-UV aging marking coating. The invention uses 3,4-dihydroxybenzaldehyde, 2-hydroxy-4-methoxy-3'-aminobenzophenone, sodium borohydride, etc., as reactants to prepare a benzophenone anti-UV absorber containing catechol groups. This absorber is then compounded with nano-zirconia, waterborne hydroxyl acrylic resin, etc., to obtain component A. An isocyanate curing agent is used as component B, resulting in a two-component polyurethane anti-UV aging marking coating. The catechol groups of the benzophenone anti-UV absorber coordinate with the surface of the nano-zirconia, thereby modifying the surface of the nano-zirconia with the anti-UV absorber. After organic modification, the dispersibility of the nano-zirconia improves, which is beneficial for improving the wear resistance and mechanical properties of the coating film, while also providing excellent anti-UV aging performance.

The invention discloses a preparation method of ultraviolet-curable hard film anti-rust oil, and belongs to the technical field of anti-rust oil. Comprising the following steps: 1, adding a compound antirust agent into 60N base oil, heating to 50-80 DEG C, dissolving and mixing to obtain a primary product; 2, after the temperature is reduced to the room temperature, 120 # solvent oil, oligomer modified polyester and benzophenone are added into the primary product, and then the mixture is stirred to be uniform at the normal temperature to obtain the hard film anti-rust oil. The compound anti-rust agent is prepared from N-oleoyl sarcosine-hexamethylenamine salt, T701, T705, T746 and span-80. The invention further discloses a preparation method of the compound anti-rust agent. The self-made surface active antirust agent (N-oleoyl sarcosine-hexamethylenamine salt) is added into the antirust oil, so that the surface tension can be effectively reduced, the ductility and adhesive force of the antirust oil on the metal surface can be improved, the weather resistance and water resistance of an antirust oil film can be improved, and the antirust performance can be improved.

The present invention relates to a primer composition that achieves excellent adhesion to poorly adhesive materials. Specifically, the present invention relates to a primer composition that includes (A) benzophenone, (B) a compound that has at least 2 benzene rings and a molecular weight of at least 190, and (C) a solvent.

The invention relates to the technical field of anti-rust coatings, in particular to a high-weather-resistance water-based environment-friendly anti-rust coating and a preparation method and application thereof. The water-based environment-friendly antirust coating with high weather resistance is prepared from the following raw materials in parts by weight: 35 to 40 parts of water-based silicone acrylic emulsion, 15 to 20 parts of modified epoxy resin emulsion, 20 to 23 parts of nano filler, 3 to 5 parts of dodecyl benzene sulfonate, 1 to 2 parts of dispersing agent, 0.5 to 1 part of defoaming agent, 0.5 to 1 part of ammonia water, 1 to 3 parts of 2-hydroxy-4-methoxybenzophenone, 0.2 to 0.5 part of benzisothiazolin-3-ketone and 40 to 50 parts of deionized water. Nano titanium dioxide in the environment-friendly high-performance coating is cooperated with the ultraviolet light absorber, shielding and absorption of high-energy ultraviolet light are enhanced, aging fracture of a polymer chain is slowed down, and the coating has excellent adhesive force and flexibility, can adapt to thermal expansion and cold contraction changes in a complex environment without cracking or peeling off, and can be used as a high-performance coating. The lasting, stable and reliable anti-rust effect is realized.

The invention relates to the technical field of mineral processing, and provides a method for extracting fine iron powder from raw iron ore, which comprises the following steps: crushing and screening the raw iron ore to obtain crude raw iron ore; performing first-stage grinding, first-stage magnetic separation, second-stage grinding, second-stage magnetic separation, third-stage magnetic separation, flotation extraction and drying on the crude iron ore to obtain fine iron powder; a collecting agent is added during flotation extraction, and the collecting agent is prepared from the following components in parts by weight: 42 to 45.5 parts of sodium oleate, 18 to 19.5 parts of sodium stearate, 8 to 11.5 parts of benzohydroxamic acid, 5 to 7.5 parts of nonylcyclohexanol polyoxyethylene ether, 5 to 7 parts of castor oil polyoxyethylene ether, 5 to 7.5 parts of polypropylene glycol and 2 to 4.5 parts of sodium citrate. By means of the technical scheme, the problem that in the prior art, the iron recovery rate of fine iron powder extracted from raw iron ore is insufficient is solved.