187 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.

The invention discloses a multi-solid waste interface collaborative optimization regenerant and a preparation method of a regenerated asphalt mixture thereof, and belongs to the technical field of road material regeneration. In order to solve the problems that a traditional single regenerant is insufficient in performance improvement, low in solid waste utilization rate and high in carbon emission, citric acid is used for activating steel slag powder to enhance the reactivity of the steel slag powder and fatty acid methyl ester (FAME) ester groups, and a silane coupling agent is used for modifying waste tire rubber powder to improve the interfacial compatibility of the waste tire rubber powder with steel slag and asphalt; lignosulfonate stabilizes FAME, reduces interfacial tension of FAME and improves dispersibility of FAME, and then three-component interface collaborative optimization is achieved. According to the invention, the rigid reinforcing effect of the steel slag powder, the elastic recovery characteristic of the rubber powder and the regeneration function of the FAME are fully utilized, and a gradient temperature mixing process is combined to form a'rigid reinforcing-elastic buffering-dynamic regeneration 'synergistic mechanism. The composite regenerant can recover the viscosity, rheology and other characteristics of the aged asphalt, improve the high and low temperature and other comprehensive pavement performance of the regenerated asphalt mixture, and achieve the purposes of multi-element solid waste recycling and low carbonization.

The present application provides novel polypeptides with lipase activity, which comprise the amino acid sequences shown in SEQ ID NO: 4 or 6, or sequences obtained by substituting, deleting or adding at least one amino acid to the above sequences. The present application also provides polynucleotides encoding the polypeptides, expression vectors containing the above polynucleotides and host cells. In addition, the present application also relates to the uses of the polypeptides with lipase activity. The polypeptides disclosed herein can rapidly prepare fatty acid methyl esters at high temperatures and high methanol concentrations, and are thus used for the preparation of biodiesel.

The invention relates to the technical field of fire extinguishing agents, and particularly discloses a lithium battery fire extinguishing agent and a preparation method thereof. The degradable surfactant is selected from at least one of alkyl glycoside and fatty acid methyl ester sulfonate; the particle size of the nanoscale silicon dioxide particles is 10 to 100 nm; the composite flame retardant is formed by compounding an organic phosphorus compound and graphene oxide according to a mass ratio of 1: (0.5-2); the antifreeze agent is selected from at least one of ethylene glycol and propylene glycol; the thickening agent is selected from at least one of xanthan gum and sodium carboxymethyl cellulose; the preservative is selected from at least one of sodium benzoate and potassium sorbate; through the synergistic effect of the composite flame retardant, the fire extinguishing efficiency is remarkably improved, reburning is inhibited, in addition, nano silicon dioxide is uniformly dispersed after being subjected to surface modification to form a compact heat insulation layer, the degradable surfactant and the environment-friendly preservative are combined, and the agent is free of toxic residues.

The invention relates to a mining underground hydrogen sulfide removal dust falling agent and a preparation method thereof, and belongs to the technical field of dust suppression and dust falling. The dust settling agent provided by the invention comprises the following components: 10-15 parts of fatty acid methyl ester sodium sulfonate; 3 to 5 parts of sodium lauryl sulfate; 4 to 6 parts of sodium dodecyl benzene sulfonate; 3 to 5 parts of dodecyl amine; 1-3 parts of sodium bicarbonate; according to the present invention, through the synergistic interaction effect of the surfactant, the dust particles and the liquid are well dispersed and wetted, and the reaction of the sodium bicarbonate and the hydrogen sulfide is promoted so as to increase the dust adsorption efficiency and the hydrogen sulfide gas neutralization effect, such that the technical purpose of the present invention is achieved. The raw materials are easy to obtain, the preparation process is simple and convenient, the cost is low, the effect is remarkable, the working environment of coal miners can be effectively improved, and safety and health of the miners are guaranteed.

The invention relates to the technical field of cleaning agents, and particularly discloses a composite cleaning agent as well as a preparation method and application thereof. The composite cleaning agent comprises the following raw material components in percentage by mass: 5%-10% of inorganic particles, 5%-15% of a surfactant, 15%-30% of a cleaning aid and the balance of water, wherein the surface active agent is prepared from rhamnolipid, fatty acid methyl ester ethoxylate, cocamidopropyl betaine and sophorolipid; the inorganic particles comprise soluble sodium salt and nano silicon dioxide; the cleaning auxiliary agent comprises a geranium extracting solution, a herba portulacae extracting solution, lauric acid and glycerol. The composite cleaning agent is simple in raw material components, simple and convenient in preparation method, low in cost and free of secondary pollution to the environment. The composite cleaning agent effectively solves the problems that an existing train cleaning agent is poor in cleaning effect, complex in manufacturing process and unfriendly to the environment.

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 provides dewaxing, repairing and blocking integrated liquid and application thereof in a pathological specimen immunohistochemical operation method. The dewaxing, repairing and blocking integrated liquid is prepared from the following components in percentage by mass: 1.0 to 5.0 percent of Triton-100, 1.0 to 5.0 percent of Tween 20, 0.1 to 3.0 percent of fatty acid methyl ester ethoxylate, 0.1 to 1.0 percent of tetrahydrofurfuryl alcohol, 0.001 to 0.01 percent of 2-methyl-3-isothiazolinone, 0.01 to 4.0 percent of buffer solution and the balance of water. In the process of applying the dewaxing, repairing and blocking integrated body fluid to the pathological specimen immunohistochemical operation method, compared with an existing laboratory method, the dewaxing, repairing and blocking integrated body fluid is used at the temperature of 65-75 DEG C, the steps of xylene dewaxing and gradient alcohol hydration after dewaxing in an existing laboratory can be replaced, the temperature continues to rise to 95-99 DEG C, and when antigen repairing is conducted on a sample, the temperature of the sample is lowered to 95-99 DEG C; according to the method, the step of blocking 0.3-3% of hydrogen peroxide in an existing laboratory is replaced by the enzyme activity of high temperature on endogenous catalase, and the same effects of dewaxing, repairing and blocking in the existing laboratory are achieved on the basis of reducing the experimental steps and the experimental time.

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 discloses a method for detecting glyceride and fatty acid composition ratio in mixed fatty acid glyceride by thin-layer chromatography-gas chromatography coupling, and the method mainly comprises the following steps: 1) internal standard solution is prepared; 2) mixed fatty acid glyceride need testing solution is prepared; 3) thin-layer chromatography is used to separate mixed fatty acid glyceride; 4) fatty acid methyl ester is prepared; 5) gas chromatography is used to detect, and the fatty acid composition of monoglyceride, diglyceride and triglyceride and the ratio of each fatty acid are determined respectively; and 6) the sum of the fatty acids of each monoglyceride, diglyceride and triglyceride obtained after data analysis in step 5) is divided by the fatty acid sum of monoglyceride, diglyceride and triglyceride, and the composition ratio of each monoglyceride, diglyceride and triglyceride in mixed fatty acid glyceride is obtained. The method of the present invention is simple and efficient to operate, and is quantitatively accurate, and methyl esterification reaction conditions are mild, equipment is simple, and no special equipment is required.

The invention relates to the technical field of smelting waste residues, in particular to a method for recovering nonferrous metals from smelting waste residues. The method comprises the following steps that S1, the smelting waste residues are pretreated, specifically, the smelting waste residues are copper smelting residues, and the smelting waste residues are pretreated to obtain mineral powder; and S2, a collecting agent is prepared, wherein the collecting agent is prepared from orange peel, warm water, ethyl alcohol, oleoyl chloride, acetone, triethylamine and fatty acid methyl ester. In the recovery treatment process of the smelting waste residues, by adjusting and optimizing the formula of the collecting agent and utilizing the surface activity capacity of pectin, polysaccharide and terpene contained in the orange peel, the collecting agent is endowed with good mineral affinity capacity, and the collecting agent can be used for collecting metal ions. The collecting agent can play a role in wetting and dispersing in a flotation environment, so that the collecting agent can be firmly adsorbed on the surface of copper minerals generated after melting, and the efficiency of flotation adsorption of the copper minerals is effectively improved.

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.

Compositions comprising oils of plant or animal origin, such as fatty acid alkyl esters, are stabilized against oxidation using oxidized aminophenol antioxidants. The aminophenol includes one or two carbon-containing groups including hydroxyl groups and / or ether groups separated from an N atom by one or more carbon atoms. The oxidized aminophenol antioxidants effectively control oxidation in moderate and even low amounts, can be used in a variety of different oil and fatty acid methyl ester formulations, and are effective at elevated temperatures, and exhibit significantly superior performance to conventional antioxidants.

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 relates to the technical field of plasticizers, in particular to a chlorinated fatty acid methyl ester composite PVC plasticizer and a preparation process thereof.The chlorinated fatty acid methyl ester composite PVC plasticizer is prepared from, by weight, 70-85 parts of chlorinated fatty acid methyl ester, 10-20 parts of epoxidized soybean oil, 3-5 parts of stabilizing powder, 1-3 parts of viscosity reduction auxiliaries, 1-2 parts of adsorption materials, 1-1.5 parts of anti-yellowing composite powder and 0.5-1 part of calcium-zinc stabilizer. According to the invention, rare earth composite particles coated with stearic acid are introduced into the stable powder, an efficient thermal stable network is constructed, active groups in the composite particles selectively capture acidic ions released by decomposition of polyvinyl chloride, a chain reaction of acid catalytic degradation is interrupted, and the hydrolysis process of ester groups can be delayed; the decomposition temperature of the material in a high-temperature environment is increased, and the technical bottleneck of insufficient high-temperature stability of the traditional plasticizer is solved.

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 invention discloses biodiesel and a preparation method thereof, and belongs to the technical field of petrochemical engineering. The preparation method comprises the following steps: carrying out aldol condensation reaction on a biomass platform aldehyde compound and a carbonyl compound containing carboxyl or ester group to obtain a carboxyl-containing long-carbon-chain oxygen-containing compound; converting the carboxyl-containing long-carbon-chain oxygen-containing compound into long-carbon-chain fatty acid through a selective hydrodeoxygenation reaction; the method comprises the following steps: carrying out esterification reaction on long-carbon-chain fatty acid and methanol to generate long-carbon-chain fatty acid methyl ester; according to the method, low-cost biomass can be effectively converted into high-value biodiesel, dependence on animal and vegetable oil and algae oil in the traditional biodiesel production process is reduced, efficient utilization of biomass resources is achieved, and the production cost of the biodiesel is reduced.

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.