143 results about "Fatty acid methyl ester" patented technology

The utility model discloses reaction equipment with high crude methyl ester yield, which comprises a stirring kettle and a material circulating system, the material circulating system comprises a circulating pump, a spray pipe arranged in the stirring kettle and a mixing nozzle arranged on the spray pipe, and a bottom outlet of the stirring kettle is connected with a feed port of the circulating pump through a first pipeline. An outlet of the circulating pump is connected with the spray pipe through a second pipeline; the mixing nozzle comprises a first sprayer and a second sprayer, and an outer flaring in the lower portion of the second sprayer is in clearance fit with the conical head through a connecting piece. The material circulating system can realize bottom-out and top-in of materials, so that the mixing of an oil phase and an enzyme water phase is promoted through the reciprocating circulation. In addition, the material circulating system is provided with a plurality of mixing nozzles, the flow speed of spraying of the first spray head is large, so that a negative pressure suction gap is formed at the joint of the second spray head and the first spray head, materials in the stirring kettle can enter the mixing nozzles under the action of negative pressure, an oil phase and an enzyme water phase are intensively mixed, and the yield of fatty acid methyl ester is improved.

This invention discloses a method for preparing high-quality bio-based 1,9-nonanediol, comprising the following steps: transesterification, precipitation, fatty acid methyl ester refining, ozone oxidation pyrolysis, solvent recovery, esterification, dimethyl azelaate refining, and hydrogenation to obtain high-quality bio-based 1,9-nonanediol. This invention achieves gradient and full-component utilization of vegetable oil raw materials: the oil-based portion of triglycerides is used to produce high-quality bio-based 1,9-nonanediol, while simultaneously producing byproducts such as methyl palmitate, methyl stearate, propionic acid, hexanoic acid, and nonanoic acid; the glycerol-based portion of triglycerides is used as a byproduct of glycerol production. This invention utilizes esterification to reconstruct the products of ozone oxidation pyrolysis, converting the high-boiling-point monomethyl azelaate into the low-boiling-point dimethyl azelaate, achieving efficient separation from saturated fatty acid methyl esters. The dimethyl azelaate, as a raw material, is then hydrogenated to obtain high-quality nonanediol, significantly reducing production costs.

This invention relates to an alcohol-based fuel additive, its preparation method, and its application, belonging to the technical field of diesel fuel additives. The additive, by weight, comprises: a mixture of C3-C10 fatty alcohols, fatty acid methyl esters, methyl tert-butyl ether, isoamyl nitrate, dimethyl carbonate, and diesel fuel. The mass ratio of methyl tert-butyl ether to dimethyl carbonate is [value missing]. This invention employs a stepped feeding process, solving the problem of combustion improver failure caused by high shear heat generation by cooling the fuel before adding isoamyl nitrate, and ensuring long-term fuel stability at -10°C using a specific polarity gradient ratio. The fuel prepared by this invention has a high cetane number, strong power, and good anti-stratification effect, making it suitable for compression ignition engines.

The present application relates to a kind of directly oiling oil agent of crude oil of polyester high-speed spinning special oil and preparation method, the oil agent of the present application contains not less than 20wt% anti-coking agent;Anti-coking agent is composed of fatty acid methyl ester ethoxylate type surfactant and polyethylene glycol laurate of double end-capped;Preparation method is: proportionally sequentially adding each component into reaction kettle, stirring uniformly, after 1~1.5h under 40~45 ℃, send to precipitation kettle and carry out cooling, after 15min, filter, directly oiling oil agent of polyester high-speed spinning special oil of crude oil is obtained.The oil agent of the present application contains little water, is not easy to delamination, corruption, not easy to evaporate when passing through hot roll, to avoid the environmental hazards and influence to human health generated, and it has good anti-coking property and antistatic property, the energy consumption when carrying out polyester high-speed spinning also has some reduction.

The invention discloses a high-alkali-resistance textile degreaser as well as a preparation method and application thereof, and relates to the technical field of textile pretreatment. The method comprises the following steps: S1, carrying out a neutralization reaction on fatty acid methyl ester sulfonic acid and a mixed alkali solution of sodium hydroxide and alkanolamine, and controlling the pH value of a reaction endpoint to be 6.0-7.5 to obtain a mixed salt of sodium fatty acid methyl ester sulfonic acid and alkanolamine; s2, adding an alkyl polyglucoside aqueous solution into the mixed salt obtained in the step S1 to form mixed micelles; s3, fatty acid ester ethoxylate and a bio-based cosolvent are added into the mixed micelle obtained in the step S2, homogenization treatment is conducted, and homogeneous microemulsion is obtained; and S4, cooling the microemulsion obtained in the step S3, adding a chelating dispersant and water, and uniformly mixing to form the high-alkali-resistance textile degreaser. The textile degreaser prepared through dication modification and micelle recombination has good alkali resistance, excellent low-temperature water solubility and full-bio-based environmental protection characteristics, and is suitable for pretreatment of textiles such as cotton, polyester and the like.

This invention relates to the field of coal washing and beneficiation technology, and discloses a method for preparing a nano-flotation reagent for coarse coal slime. The method involves mixing sulfonated fatty acid methyl ester with kerosene and n-octanol to form an oil phase, then further mixing this with an aqueous phase containing a nonionic emulsifier, and adding functionalized nano-silica to obtain a mixed solution. This mixed solution is then sequentially treated by ultrasonic dispersion, high-speed stirring, and micro-electrolysis to generate nano / microbubbles in situ and maintain their uniform distribution, resulting in a nano-microemulsion. This invention can significantly improve the adhesion efficiency and loading capacity of coarse coal surfaces, effectively suppress tailings runoff, and improve the transportation and collection efficiency of coarse coal. It solves the problems of low clean coal yield and tailings runoff caused by the low adsorption efficiency and poor foam stability of traditional flotation reagents for coarse coal.

The invention relates to the field of wood modification, in particular to modified wood and a modification method thereof. The method comprises the following steps: (1) drying wood to be modified to constant weight to obtain dried wood; (2) the dried wood is placed in steeping liquor to be treated, and steeped wood is obtained; the steeping liquor comprises any one of steeping liquor I and steeping liquor II; the impregnation liquid I comprises silicate and organic acid I; the impregnation liquid II comprises organic acid II, mixed fatty acid methyl ester and wax. On the premise of ensuring simple operation steps, the porosity of the wood can be reduced, and the dimensional stability, high humidity resistance and salt resistance of the wood can be improved.

A brightening and stain-removing laundry sheet and a preparation method therefor. The laundry sheet comprises: a film-forming agent, an anionic surfactant, a nonionic surfactant, a fluorescent brightening agent, an anti-fouling agent, an enzyme formulation, a plant extract, a chelating agent, and an auxiliary agent. The film-forming agent comprises a film-forming agent A and a film-forming agent B, the film-forming agent A being polyvinyl alcohol, and the film-forming agent B comprising one or more of polyvinylpyrrolidone and modified polyvinyl alcohol. The anionic surfactant comprises sodium alkyl sulfate, sodium fatty acid methyl ester sulfonate, and sodium α-alkenyl sulfonate; and the nonionic surfactant comprises polyglycerol ester of fatty acid, fatty alcohol-polyoxyethylene ether, fatty acid methyl ester ethoxylate, and alkyl polyglycoside. The laundry sheet has high solubility, achieves a remarkable brightening effect on fabrics while having stain-removing capability, and further possesses the advantages of good portability, convenient use, no solid matter remaining after use, etc.

The invention discloses a corrosion inhibitor based on astragalus membranaceus leaves, a compound corrosion inhibitor and a preparation method and application thereof, and belongs to the technical field of corrosion inhibitor preparation.The preparation method comprises the following steps that astragalus membranaceus leaf powder is placed in an ethanol water solution, ultrasonic-assisted extraction is conducted after room-temperature dipping, after extraction is completed, an extracting solution is filtered and collected, and rotary evaporation and concentration are conducted; then low-temperature freeze drying is conducted, the corrosion inhibitor based on the astragalus membranaceus leaves is obtained, and the efficient green compound corrosion inhibitor is obtained by compounding the corrosion inhibitor based on the astragalus membranaceus leaves with calcium glycinate and sodium fatty acid methyl ester sulfonate. The method is used for solving the technical problems that biomass resources are wasted, the environment is polluted and a green corrosion inhibitor for aluminum in an alkaline environment is deficient due to the fact that existing astragalus membranaceus leaves are discarded as a traditional Chinese medicinal material processing byproduct for a long time.

The invention relates to a preparation method and application of a nucleating agent. The preparation method comprises the following steps: mixing solvent pure water, calcium hydroxide and fatty acid methyl ester sulfonate, and heating; dropwise adding hexahydrophthalic anhydride into the mixed solution, and after dropwise adding is completed, carrying out heat preservation reaction to obtain the calcium hexahydrophthalate. The product has excellent performance when used for thermoplastic resin such as polyolefin.

The invention relates to wide-temperature-range modified natural ester insulating oil and a molecular structure design method thereof, and the molecular structure of the wide-temperature-range modified natural ester insulating oil with different ester chain structures is obtained by converting natural ester into mixed fatty acid methyl ester with the chain length of C8-C18, then blending the proportion and introducing groups for molecular modification. According to the design method, natural ester insulating oil molecules with different ester chain structures are constructed, and the influence rule of the fatty acid methyl ester carbon chain length proportion, the C = C double bond number and the modification group on the flash point and pour point of the natural ester insulating oil is obtained; the obtained wide-temperature-range modified natural ester insulating oil not only keeps the high flash point of the natural ester insulating oil, but also has the characteristic of low pour point, so that the working temperature range of the natural ester insulating oil is widened, and the defect that a natural ester insulating oil transformer operates under high-altitude, cold regions and extreme weather conditions is overcome; the preparation process is simple, reaction conditions are mild, the environment is not polluted, and batch production is easy.

This invention belongs to the field of drilling engineering technology, specifically relating to a nanofiber-reinforced foam system for foam drilling fluid and its preparation method. The nanofiber-reinforced foam system for foam drilling fluid includes a gas phase and a liquid phase. The liquid phase comprises the following raw material components by mass percentage: 0.3-0.8 wt% foaming agent, 0.3-1.0 wt% nanofibers, and the balance being water. The foaming agent is prepared by in-situ polymerization of sodium isomeric tridecyl alcohol polyoxyethylene ether carboxylate and fatty acid methyl ester ethoxylate, followed by the introduction of hydrophilic monomers and crosslinking agents, using ammonium persulfate as an initiator. This invention's system exhibits high temperature and high salinity resistance, strong foam stability, and solves the problems of poor stability, insufficient temperature and salt resistance, high cost, and poor environmental performance of existing foam drilling fluids, achieving intelligent matching of foam performance with formation conditions.

The invention discloses a method for preparing high-purity vanadium pentoxide based on nano-filtration and membrane separation coupling. The method comprises the following steps: (1) carrying out ball milling and sieving on vanadium slag; mixing the ball-milled vanadium slag with a sodium hydroxide solution, and removing insoluble impurities to obtain a vanadium-containing solution; (2) adding ethoxylated fatty acid methyl ester into the vanadium-containing solution, and uniformly stirring to obtain a vanadium-containing mixed solution; pressurizing to enable the vanadium-containing mixed solution to pass through a nanofiltration membrane, and collecting a vanadium-containing concentrated solution; (3) adding ammonium sulfate into the vanadium-containing concentrated solution, and stirring to separate out precipitate to obtain a vanadium-containing solid; and (4) drying and calcining the vanadium-containing solid to obtain vanadium pentoxide. The purity of the obtained vanadium pentoxide is greater than or equal to 99.99%, and the recovery rate of vanadium is greater than or equal to 95.0%. The method is simple in technological process, the vanadium-containing solution is purified through a nano-filtration and membrane separation method, the separation process is simple and convenient, the separation efficiency is high, the production period can be shortened, the cost is reduced, and environmental pollution is reduced.

The invention provides a flax seed fatty acid rapid extraction and component determination method, relates to the technical field of agricultural chemical analysis, and has the technical key points that the extraction method comprises the following steps: taking flax seeds and crushing; saponification and methyl esterification reaction: weighing the crushed flax seeds in the step S1, placing the flax seeds in a centrifugal tube with a plug, adding a 1% methanol-sodium hydroxide solution, shaking to fully and uniformly mix the sample and the solution, and standing to complete the reaction; neutralizing the alkali in the solution; n-heptane is added into the solution, and generated fatty acid methyl ester is fully extracted. By optimizing an extraction solvent system, innovatively combining extraction and derivatization steps and adopting an efficient instantaneous extraction / reaction technology, the total extraction time is shortened from tens of hours of a traditional method to tens of minutes on the premise of ensuring the extraction efficiency and the methyl esterification conversion rate, meanwhile, the solvent dosage and the operation steps are reduced, and the production cost is reduced. Powerful technical support is provided for quality control, functional food development and genetic breeding of the flaxseeds.

The application specifically relates to an acidic oil removing agent and a preparation method and application thereof, and belongs to the field of circuit board processing aids. The acidic oil removing agent is composed of inorganic acid, fatty acid methyl ester ethoxylate sulfonate, asparagine-choline ionic liquid, 5-hydroxymethyl furfural, sodium lignosulfonate, polymaleic anhydride and water, the composition and ratio of which are reasonable and the effect is outstanding. Compared with other oil removing agents, the acidic oil removing agent can solve the problems of poor decontamination effect and high foaming amount of the existing acidic oil removing agent, can avoid corrosion of the PCB (printed circuit board) in the oil removing process, effectively guarantees the oil removing pretreatment effect of the circuit board, is suitable for various process procedures in the PCB production which need copper surface oil removing pretreatment, and has a good application prospect in the process procedure and quality improvement of the oil removing and cleaning of the circuit board.

The invention relates to the technical field of oil and fat refining, in particular to an edible waste oil and fat recovery process. Comprising the following steps: heating, centrifuging, dehydrating and deslagging the edible waste oil; preparing a magnetic phase transfer catalyst; the prepared amino acid ionic liquid is used as a green catalyst and is used for finely treating waste grease and recycling. The amino acid ionic liquid prepared by taking 1-butyl-3-methylimidazole hydroxide and alanine as raw materials can greatly promote two-phase interface mass transfer which is difficult to occur in a homogeneous reaction in a biodiesel transesterification reaction, so that the transesterification reaction is efficiently catalyzed to generate fatty acid methyl ester, namely biodiesel and glycerol; after the reaction is finished, the amino acid ionic liquid can be separated from a reaction system through standing layering or simple centrifugation by virtue of the characteristics of non-volatility and immiscibility with a product, so that the effects of increasing the content of an effective component, namely fatty acid methyl ester, in biodiesel and reducing impurities are achieved, and meanwhile, the amino acid ionic liquid is more environment-friendly compared with a traditional base catalyst; and the method has the characteristic of environmental friendliness.

The present invention relates to a composition for coating cheese. In particular, the present invention relates to a composition for coating cheese comprising a high amount of beeswax and one or more further compound selected from the group of unsaturated fatty acids, fatty acid methyl esters and fatty alcohols.

The application discloses a preparation method of a hollow multi-level hole HS-1 molecular sieve encapsulated bimetallic catalyst, which comprises the following steps: (1) mixing a silicon source and a template agent in water; (2) calcining; (3) preparing an active metal impregnation solution; (4) impregnating S-1 molecular sieve powder in the active metal impregnation solution; (5) drying; (6) calcining; (7) dissolving in an alkaline solution; (8) standing; and (9) calcining. The application further discloses the hollow multi-level hole HS-1 molecular sieve encapsulated bimetallic catalyst and the use of the bimetallic catalyst in the preparation of liquid hydrocarbon fuel through high-selectivity hydrogenation and deoxidization of fatty acid methyl ester.

This invention discloses an aging-resistant glass fiber for sheet materials and its preparation method, relating to the field of polymer materials technology. The preparation method of the aging-resistant glass fiber for sheet materials includes the following processes: uniformly grinding glass raw materials into powder, melting, drawing into fibers, coating with a reinforcing sizing agent, cooling, and winding to obtain glass fibers. This invention modifies palm oil through alkali-catalyzed transesterification, replacing the glycerol ester groups in palm oil to form single-chain fatty acid methyl esters, reducing branching, lowering the viscosity and molecular weight of palm oil, allowing it to be more uniformly dispersed in the glass fibers, and enhancing the glass fibers' resistance to atmospheric moisture erosion; it also modifies the silane coupling agent to contain both vinyl and amino groups in its structure, enhancing the bonding strength between the glass fibers and the reinforcing sizing agent, further improving the weather resistance, mechanical strength, and high-temperature resistance of the glass fibers.

This invention discloses a multi-solid waste interface synergistic optimization regenerator and its preparation method for recycled asphalt mixtures, belonging to the field of road material recycling technology. This invention addresses the problems of insufficient performance improvement, low solid waste utilization, and high carbon emissions associated with traditional single regenerators. It achieves synergistic optimization of the three-component interface by: activating steel slag powder with citric acid to enhance its reactivity with fatty acid methyl ester (FAME); modifying waste tire rubber powder with a silane coupling agent to improve its interfacial compatibility with steel slag and asphalt; and stabilizing FAME with lignin sulfonate to reduce its interfacial tension and improve dispersibility. This invention fully utilizes the rigidity-enhancing effect of steel slag powder, the elastic recovery characteristics of rubber powder, and the regeneration function of FAME, combined with a gradient temperature mixing process, to form a synergistic mechanism of "rigid reinforcement - elastic buffer - dynamic regeneration." This composite regenerator can restore the viscosity and rheological properties of aged asphalt, improve the comprehensive road performance of recycled asphalt mixtures at high and low temperatures, and achieve the goals of multi-component solid waste resource utilization and low carbon emissions.

The invention provides a silicon oxide etching solution for inhibiting titanium corrosion, which comprises the following components in percentage by mass: 6 to 10 percent of hydrofluoric acid, 16 to 24 percent of ammonium fluoride, 0.01 to 0.16 percent of active agent and the balance of ultrapure water, wherein the additive is a bio-based fatty acid methyl ester ammonium sulfonate surfactant and quinoline sulfonic acid aromatic heterocyclic sulfonic acid. The bio-based fatty acid methyl ester ammonium sulfonate surfactant and the quinoline sulfonic acid aromatic heterocyclic sulfonic acid additive are compounded for use, so that the etching solution is low in surface tension and good in wettability, and can completely etch a pore region silicon oxide medium. More importantly, the etching solution can efficiently inhibit etching of a metal titanium film layer, the etching selection ratio of silicon oxide to titanium is greatly improved, and the yield of device production is effectively improved.

The utility model discloses a fatty acid methyl ester oxidation stability measuring device, which comprises a device main body, a plurality of reaction tubes used for sample oxidation, each reaction tube is provided with an air inlet and an air outlet, and the air inlet of each reaction tube is provided with a first air inlet tube used for introducing oxygen or air flow into the reaction tube; each first gas inlet pipe is provided with a gas flow rate control device capable of controlling the flow rate of gas flow in the gas inlet pipe; according to the fatty acid methyl ester oxidation stability measuring device disclosed by the utility model, the gas inlet channels of the first gas inlet pipes are respectively provided with the flow speed control devices capable of controlling the gas flow speed of the gas inlet channels of the first gas inlet pipes, so that the gas inlet flow speed of the first gas inlet pipes can be accurately controlled; the method has high precision, high stability and good environmental adaptability, and can significantly improve the test efficiency of the fatty acid methyl ester oxidation stability test and the accuracy of the test result.

The invention discloses a cleaning agent, and relates to the field of glass cleaning agents, and the cleaning agent comprises the following components by weight: 3-5 parts of alkyl glycoside, 0.1-0.3 part of tea saponin, 3-5 parts of sodium citrate, 1-3 parts of sodium polyaspartate, 7-10 parts of fatty acid methyl ester polyoxyethylene ether, 3-5 parts of C2-C4 alcohol, 0.1-0.3 part of an alkaline pH regulator, and the balance of water. The glass cleaning agent is neutral and mild, does not contain substances such as strong acid, strong alkali, heavy metal and fluoride, is not easy to corrode glass, is suitable for all glass, is biodegradable, is environment-friendly, and is safe to operators.

Multi-carbon compounds such as ethanol, n-butanol, sec-butanol, isobutanol, tert-butanol, fatty (or aliphatic long chain) alcohols, fatty acid methyl esters, 2,3-butanediol and the like, are important industrial commodity chemicals with a variety of applications. The present invention provides metabolically engineered host microorganisms which metabolize methane (CH4) as their sole carbon source to produce multi-carbon compounds for use in fuels (e.g., bio-fuel, bio-diesel) and bio-based chemicals. Furthermore, use of the metabolically engineered host microorganisms of the invention (which utilize methane as the sole carbon source) mitigate current industry practices and methods of producing multi-carbon compounds from petroleum or petroleum-derived feedstocks, and ameliorate much of the ongoing depletion of arable food source “farmland” currently being diverted to grow bio-fuel feedstocks, and as such, improve the environmental footprint of future bio-fuel, bio-diesel and bio-based chemical compositions.

The invention belongs to the technical field of production of fatty acid methyl ester polyoxyethylene ether of FDY (fully drawn yarn) oil agents, and particularly relates to production equipment and a production process of fatty acid methyl ester polyoxyethylene ether of FDY oil agents. Four fixing strips are fixed to the bottom end of the rotating rod in a circumferential array mode, the bottom end of the rotating rod is slidably sleeved with a sleeve, stirring blades are fixed to the surface of the sleeve at equal intervals, and four sliding grooves matched with the fixing strips are formed in the inner wall of the top end of the sleeve in a circumferential array mode. By arranging the barrel body, the rotating rod, the fixing strip, the sleeve, the sliding groove, a fixing plate, a vertical rod, a connecting plate, a spring, a mounting seat, a motor, a rotating shaft, a driving bevel gear, a cam, a driven bevel gear and stirring blades, the stirring blades can rotate and can reciprocate up and down at the same time, so that raw materials can move more disorderly; therefore, the raw materials can be efficiently, quickly and uniformly mixed together, and the stirring and mixing effects are relatively good.

The invention discloses a sustainable asphalt regenerant, a preparation method and application, the sustainable asphalt regenerant comprises methyl palmitate, methyl linoleate, methyl oleate, methyl stearate, methyl eicosenoate, methyl arachidonate and the like, the content of saturated fatty acid methyl ester exceeds 21.3-25.6% of the total content of fatty acid methyl ester, and the content of saturated fatty acid methyl ester exceeds 21.3-25.6% of the total content of fatty acid methyl ester. The content of unsaturated fatty acid methyl ester exceeds 66.2-70.5% of the total content of fatty acid methyl ester, and the total fraction is 100%; the regenerant is prepared from waste edible oil and fat as a raw material, and compared with a traditional petroleum-based regenerant, the regenerant is wide in source, low in raw material cost and renewable. The sustainable asphalt regenerant can effectively recover various properties of aged asphalt, and solves the problems of poor water damage resistance and durability caused by high content of acidic compounds in the existing waste edible oil asphalt regenerant; meanwhile, the recovery and reutilization of the waste edible grease and the aged asphalt material are realized.

The application relates to the technical field of organic synthesis, and particularly relates to a preparation method of omega-amino fatty acid methyl ester and long-chain nylon. The preparation method of the omega-amino fatty acid methyl ester specifically comprises the following steps: S1, ester exchange: long-chain dibasic acid dimethyl ester, methanol and a first organic solvent are mixed in the presence of a first catalyst, and the long-chain dibasic acid monomethyl ester is obtained through an ester exchange reaction; S2, ammonia addition: the long-chain dibasic acid monomethyl ester is used as a raw material, an amidation reaction is carried out, and then a reduction reaction is carried out to obtain the omega-amino fatty acid methyl ester, wherein n is greater than or equal to 8. The preparation method has the characteristics of a short process route and stable intermediates, can be suitable for batch production, and can also be suitable for continuous production.

The application provides a high-efficiency detergent and a preparation method thereof, and relates to the technical field of daily chemical products.The detergent comprises microencapsulated composite enzymes, chelating agents, surfactants, additives and water; the active ingredients of the microencapsulated composite enzymes are composed of lipase, protease and amylase, and are prepared by sodium alginate-chitosan microencapsulation embedding, so that the enzyme activity is effectively protected, the stability of the enzymes in the detergent system is improved, and the targeted decomposition of composite stains is realized; the chelating agents are composed of tetrasodium iminodisuccinate and maleic acid-acrylic acid copolymer sodium salt, and can synergistically improve the hard water resistance and the stain removal efficiency; the surfactants are composed of sodium fatty acid methyl ester sulfonate, alkyl polyglycoside and cocamide propyl betaine, and have strong emulsifying and stain removing power and mildness.The detergent is suitable for cleaning tableware and fruits and vegetables, and has the characteristics of high stability, strong stain removing power, easy rinsing, mildness and environmental protection.

The application discloses chlorinated rubber antifouling paint and a preparation method thereof, and belongs to the technical field of antifouling paint. The chlorinated rubber antifouling paint comprises the following components in parts by weight: chlorinated rubber 20-30 parts, sorbitol polyglycidyl ether 3-6 parts, toughening agent 1-5 parts, cuprous oxide 30-40 parts, biological killing agent 4-7 parts, rosin 3-9 parts, defoaming agent 0.2-0.6 parts, pigment 2-5 parts, thixotropic agent 1-2 parts and solvent 5-10 parts. The biological killing agent is a compound of benzotriazole derivative and natural antifouling agent. The toughening agent is a compound of epoxy fatty acid methyl ester and full-acrylate core-shell impact modifier. The preparation method comprises the following steps: uniformly stirring the solvent, chlorinated rubber and sorbitol polyglycidyl ether, adding the defoaming agent, then adding the rosin, toughening agent and thixotropic agent, uniformly stirring the pigment, and then adding the cuprous oxide and biological killing agent to obtain the antifouling paint. The antifouling paint provided by the application guarantees the antifouling performance and improves the flexibility, adhesion and durability and the like.

To provide a manufacturing facility that can be implemented on an industrial scale and continuously produce fatty acid methyl esters with a low acid value, and to provide a method for producing fatty acid methyl esters using such a manufacturing facility. [Solution] A fatty acid methyl ester production facility comprising a first raw material tank for containing fatty acids, a second raw material tank for containing methanol, a reaction tower with a first raw material supply line connected to the first raw material tank at the top and a second raw material supply line connected to the second raw material tank at the bottom, and a removal line for removing the product from the reaction tower. The reaction tower is a bubble tower with 49 reaction stages. A first heat exchanger is provided for heat exchange between the first raw material supply line and the removal line.