226 results about "Gutter oil" patented technology

The invention provides a cellophane direct flotation collector. The collophanite direct flotation collector comprises, by weight, 75 parts to 80 parts of fatty acid soap, 10 parts to 15 parts of fatty acid monoethanolamine and 3 parts to 8 parts of non-ionic surface active agents, and the non-ionic surface active agents are selected from one or more of octylphenol ethoxylate, nonylphenol polyeothoxylates and fatty alcohol polyoxyethylene ether. The invention further discloses a preparation method of the cellophane direct flotation collector, illegal cooking oil serves as raw materials, and the cellophane direct flotation collector is obtained after deodorization and decoloring. The collophanite direct flotation collector is good in selectivity and high in collecting capacity. According to the method, the illegal cooking oil harmful to the environment serves as the raw materials, waste is turned into wealth, the carboxylic acid derivative collector containing hydroxyl and amide polar groups is prepared, and the collector has great actual significance in development and utilization of medium and low grade collophanite.

The invention discloses a mud cake adhesion lubricant for water-base drilling fluid, and the mud cake adhesion lubricant comprises 0.1-15wt% of mud cake adhesion lubrication improver, 0-4wt% of triethanolamine, 0.01-20wt% of surfactant and the balance of oil, wherein the chemical formula of the mud cake adhesion lubrication improver is (RCO2)[x]M or (RCO2)[x-y](OH)[y]M, wherein the R in the formula is a saturated straight chain or branched chain alkyl group of C8-C20, or an unsaturated straight chain or branched chain alkyl group of C8-C20; M is <+2>, <+3> or <+4> valent metal ions; x is equal to 2-4, y is equal to 0-2, and x is greater than y; the HLB of the surfactant is greater than 8; the oil is mineral oil, plant oil, waste engine oil, plant oil-modified oil or recovered gutter oil. The mud cake adhesion lubricant for water-base drilling fluid has excellent mud cake adhesion lubrication capability, and the reduction rate of the mud cake adhesion lubrication coefficient can achieve more than 70%.

The invention belongs to the technical field of kitchen waste recovery treatment and particularly relates to a kitchen waste treatment process. The kitchen waste treatment process comprises the following steps: treatment adopting an oil-water separator, kitchen waste treatment, treatment in a small sewage treatment station and manufacture of organic fertilizer in a treatment plant. The kitchen waste treatment process has the beneficial effects as follows: kitchen waste and gutter oil of restaurants, hotels and the like can be prevented from flowing into the society with adoption of the kitchen waste treatment process, the problem of body health of the masses caused by consumption of the kitchen waste and the gutter oil can be avoided, adverse impact of the gutter oil on the society is eliminated, source control is realized, each link is monitored in the whole process by a monitoring center, all the kitchen waste and the gutter oil are enabled to enter to the treatment plant, the organic fertilizer and biodiesel are prepared respectively, and the waste is used reasonably.

The invention relates to a waste recycling method, in particular to a method of comprehensively recycling food waste. The method comprises the steps of using ozone to disinfect, sterilize, deodorize and retain freshness, and then conducting solid fermentation; and sinking the liquid naturally sink to separate the oil from the water so as to achieve the aim of recycling floating oil and solid fermented feed or organic fertilizer in the food waste. By scientifically treating the food waste and turning waste into wealth, the production of illegal cooking oil is completely eradicated from the source. The method provided by the invention is simple and practicable, the device is simple in structure and easy to manufacture, the secondary pollution is avoided in the treatment process; and according to the method, obvious economic benefits and social benefits are realized.

The invention relates to a low-grade bauxite positive floatation collecting agent. The collecting agent comprises, by weight, 5-25 parts of gutter oil treating fluid, 65-85 parts of high-iodine fatty acid, 5-8 parts of sodium hydroxide, 0.5-1 part of an MOA emulgator in a mixed preparation manner; and the gutter oil treating fluid is prepared from gutter oil, methyl alcohol or ethyl alcohol, hydroxylammonium chloride and an alkaline solution according to the weight ratio being 5:1:2:1. According to the low-grade bauxite positive floatation collecting agent, the gutter oil is made profitable; pretreatment modification is carried out on the gutter oil, the gutter oil and other agents are compounded to obtain the novel collecting agent, a series of problems such as large agent using amount, difficult foam transportation, poor beneficiation and separation indexes and high cost are solved to a large extent, efficient resource utilization, energy saving, emission reduction, cost reduction and efficiency increasing are facilitated, and the low-grade bauxite positive floatation collecting agent is of great significance in improving comprehensive competitive power of bauxite dressing plants.

The invention relates to a method for preparing long-chain alkane from gutter oil through hydrolysis and in-situ hydrogenation and decarboxylation. The method comprises the following steps that 1, the gutter oil is mixed with water, the mixture is heated for a hydrolysis reaction, and C8-C18 fatty acid is obtained after reaction products are treated; 2, the C8-C18 fatty acid, a non-noble metal catalyst, a hydrogen-donating agent and water are together added into a high-temperature and high-pressure reaction kettle and heated to 310-410 DEG C, and a decarboxylic reaction is conducted for 0.5-7 h, wherein the active component of the non-noble metal catalyst is Cu-Ni, and a catalyst carrier is one of SiO2, ZrO2, Al2O3, MgO and MWCNTs; 3, a reaction product is cooled and dissolved with organic solvent, and a liquid product and a solid catalyst are obtained after filtration is conducted. According to the method for preparing the long-chain alkane from the gutter oil through hydrolysis and in-situ hydrogenation and decarboxylation, the gutter oil is catalyzed by the non-noble metal catalyst in high-temperature water, in-situ hydrogenation and decarboxylation are conducted on a hydrolysis product to prepare the long-chain alkane, and compared with an existing technology, the method has the advantages of being simple in process, free of hydrogen consumption and low in catalyst cost; in addition, the total mass yield of the long-chain alkane in the method can reach 75.4% or above.

The invention discloses an environment-friendly oily emulsion release agent. The environment-friendly oily emulsion release agent is prepared from the following raw materials in percentage by weight: 50-60% of oily substance, 0.2-0.6% of polyoxyethylene ether, 0.05-0.1% of triethanolamine, 0.2-0.5% of a water-based silane coupling agent, and the balance of deionized water, wherein the oily substance is mineral oil, or used oil and mineral oil, or gutter oil and mineral oil. The invention further discloses a preparation method of the release agent. The release agent has the oil-water compatible characteristic, solves the problems of incompatibility of oil and water and layering, can be diluted with water for long-time preservation without layering, avoids the pollution to concrete surface by using the used oil, prevents the corrosion of the water-soluble release agent to a steel template, and avoids diluting engine oil by using diesel in the past. The environment-friendly oily emulsion release agent is milk-white liquid capable of being sprayed and coated, is conveniently used, suitable for various concrete templates, and colorless and transparent when being coated on the templates, and has good adhesiveness.

The invention provides a method for preparing fast detecting test paper of illegal cooling oil. The method includes the following steps of sequentially preparing immune colored latex microspheres, an immune colored latex reaction pad and a nitrocellulose (NC) membrane and assembling a colored latex test strip. By means of the detecting test paper of the illegal cooking oil, detection sensitivity is high, a plurality of indexes can be simultaneously detected, a comprehensive and systematic detection method is provided for detecting the illegal cooking oil, and detection costs are relatively reduced; the quality of the detecting test paper can be guaranteed for two years at normal temperatures, the quality guarantee period is effectively prolonged, and preservation conditions are reduced; non-professional persons can use the detecting test paper to accomplish whole detection, so that the operation is simple, and popularization of the method is facilitated; and the whole detection process can be accomplished in 10 minutes at the soonest, and the detecting test paper is suitable for fast field screening.

The present invention discloses a comprehensive pre-treatment method of kitchen garbage and gutter oil. The method comprises material collection, sorting treatment, pulping treatment, deoiling treatment and overall deodorization treatment. By adopting a multi-step and multi-stage sorting process, the method disclosed by the invention effectively separates non-biomass impurities in kitchen wastes, thereby providing an advantageous condition for a subsequent treatment process. According to the present invention, a two-stage centrifugal manner is used in grease separation and purification for increasing the separation accuracy, reducing the residence time, reducing the energy consumption, and a primary stage horizontal centrifuge is used for solid-liquid separation and a secondary vertical centrifuge is used for oil-water separation. As materials with a high solid content separated by the primary centrifuge no longer enter into the secondary centrifuge, the energy consumption is significantly reduced, the residence time can be shortened, and the separation accuracy is improved. According to the method disclosed by the present invention, the pre-treated materials have an ultra low oil content, can be adaptive to various post-treatment processes of composting, producing biogas by anaerobic fermentation, processing feeds and the like, and can be flexibly applied to subsequent process, thus providing a guarantee for realizing harmlessness and recycle of kitchen wastes.

The invention relates to a formula of epoxy gutter oil plasticized PVC (Poly Vinyl Chloride). In a test, sulfuric acid is taken as a catalyst, hydrogen peroxide is taken as an oxygen supply agent, formic acid is taken as an oxygen receiving agent, and the epoxidation reaction conditions of gutter oil are researched in one step by adopting performic acid. The method is suitable for industrial popularization and application. Therefore, the optimal processing formula of the epoxy gutter oil plasticized PVC is designed by taking the epoxy gutter oil as a plasticizer in the PVC production process instead of the conventional dioctyl phthalate.

The invention discloses a method for detecting illegal cooking oil, test paper and application of the test paper. According to the method, a lipopolysaccharide antibody and / or a fat-soluble protein antibody are / is taken as an antibody for detection. The method comprises the following steps of: preparing an antibody A and an antibody B by using a hybridoma cell strain gzcdc-ETX001; reacting fluorescein molecules with glucan molecules to obtain glucan molecules combined with fluorescein, reacting the glucan molecules combined with the fluorescein with the antibody B, and purifying to obtain a glucan-antibody B-fluorescein mixed marker; and reacting a sample to be tested with the antibody A, adding the glucan-antibody B-fluorescein mixed marker, continuing to react, and detecting by using a device for detecting fluorescence so as to judge whether the illegal cooking oil is contained in the sample to be tested. The glucan-antibody B-fluorescein mixed marker is enveloped by a bonding pad in the test paper for implementing the method; and a detection band on a chromatographic membrane is fixed with the antibody A, and a quality control band is fixed with an antiantibody which can be specifically combined with the glucan-fluorescein marked antibody B. The test paper is sensitive and easy to use.

The invention provides a lubricant. The lubricant consists of the following components in parts by weight: 200-280 parts of gutter oil, 50-60 parts of stearate, 20-35 parts of an extreme pressure agent, 10-25 parts of an emulsifier, 70-100 parts of an alcohol ether compound, 120-180 parts of fatty acid salt and 15-25 parts of an antifoaming agent. The lubricant disclosed by the invention is mainly prepared from the gutter oil which is quite easy to be biodegraded, so that the lubricant is biodegradable and is free from environmental pollution; and the lubricant is quite low in cost because the gutter oil is wide in source and low in price. Experiment results show that the lubricant disclosed by the invention is free from fluorescence and is excellent in lubricating performance and high temperature resistance.

The invention provides a low-cost environment-friendly oil-soluble viscosity reducing agent for super heavy oil, which is prepared from the following raw materials by mass: 20-65% of a main agent, 35-80% of a solvent and 0.05-1% of an initiator, wherein the main agent is composed of gutter oil, aromatic hydrocarbons and alkenes containing anhydrides at a mass ratio of 3:1:(1-3):3:3. The oil-soluble viscosity reducing agent provided by the invention utilizes environmental waste (gutter oil) to reduce production cost and realizing the full utilization of waste resources, can greatly reduce the viscosity of super heavy oil, saves the use amount of thin oil, and meets the requirements of heavy oil recovery.

Copper oxide and copper sulfide ore flotation agent is made with, by weight, 15-19 parts of gutter oil, 3-5 parts of silica sol, 5-7 parts of sodium naphthenate, 4-5 parts of urea, 2-3 parts of sodium carbonate, 5-7 parts of chitosan, 6-9 parts of mimosa extract, 3-4 parts of sodium metabisulfite, 2-4 parts of fatty alcohol-polyoxyethylene ether, 20-25 parts of black powder, and 4-5 parts of activator. The floatation agent with the gutter oil remains foamy, and the cost is reduced; through the use of the chitosan and silica sol, flocculation is effective and yield is increased; the flotation agent is capable of well collecting copper, copper yield is high, the flotation agent is well selective, has good inhibitory action against other ores, and copper grade is high. The activator contains the components such as jade nanopowder, is capable of stably dispersing and has good permeability and activity, the activation effect lasts long, and the yield and grade of copper is increased. The flotation agent is low in environmental pollution.

The invention discloses a method for preparing an alkyd resin using illegal cooking oil and belongs to the field of high polymer materials. The method includes the following steps of putting hogwash oil, rosin, glycerol, pentaerythritol, neopentyl glycol, and an accelerant into a reaction still, and performing heating and reaction; cooling acquired reactants, putting terephthalic acid in the reaction still, and performing heating and reaction; heating the reactants, adding a backflow solvent, and performing backflow heat preservation; cooling reactants, adding a petroleum resin, and performing even stirring; diluting an obtained material with a solvent. According to the method for preparing the alkyd resin using the illegal cooking oil, by means of a formulation design of the reclaimed illegal cooking oil and hogwash oil, the alkyd resin with high properties is prepared through synthetic reaction, manufactured antirust paint is excellent in antiseptic property, and ready mixed paint or enamel paint is excellent in weather fastness, glossy, bright-colored, and good in property.

The invention discloses a bactrocera dorsalis slow-release type attractant which includes the following components by mass percent: 80-90% of methyl eugenol, 5-10% of a synergist and 5-15% of a slow-release agent, wherein the synergist adopts one or more of orange oil, psidium guajava essential oil, mango essential oil, loquat flower essential oil and carambola essential oil; the slow-release agent adopts one or more of vegetable oil and gutter oil. The bactrocera dorsalis slow-release type attractant provided by the invention adopts a simple, effective and pollution-free slow-release and synergistic technology, and includes not only methyl eugenol active substances but also plant essential oil which has a synergistic effect, as well as the slow-release drug for increasing the drug effect duration, so as to prolong the attraction time and improve the attraction effect of the bactrocera dorsalis attractant, and satisfy technology requirements for effective and long-lasting prevention and control. The raw materials used by the bactrocera dorsalis slow-release type attractant have the characteristics of being environment-friendly, low in cost and long in drug effect duration.

The invention discloses a method for detecting swill-cooked dirty oil by using a biology tracer technique. An antioxidant capable of carrying out thermal decomposition is added in fresh edible oil in a scope of food additives, the antioxidant and thermal decomposition matters of the antioxidant serve as tracers, the oil can be detected to be the swill-cooked dirty oil if any thermal decomposition matter of the antioxidant is detected. With the adoption of the method, a swill-cooked dirty oil sample which comprises a sample of the fresh edible oil doped with the swill-cooked dirty oil can be effectively identified, the tracers generated by the thermal decomposition are various and not easy to separate and remove, so that accordingly circulation of the swill-cooked dirty oil on the market is avoided.

The invention relates to a method for preparing a thickened oil viscosity reducer based on gutter oil as a raw material. The method comprises the following steps of carrying out amidation reaction on gutter oil which is rich in source and is enriched in triglyceride and N,N-dimethyl-1,3-propanediamine to produce oleamide having terminal groups containing tertiary amide and reacting bimolecular oleamide having terminal groups containing tertiary amide with monomolecular 1,4-butanediol diglycidyl ether to produce Gemini amphiphilic molecules containing quaternary ammonium ions. The compound has thickened oil emulsifying capability. The preparation method is simple and low in cost and provides a new way to treat gutter oil.

The invention relates to an anionic collector for normal temperature flotation of hematite and a preparation method thereof. The anionic collector is prepared from the following raw materials in parts by weight: 12.5-70.0 parts of gutter oil fatty acid, 12.5-70.0 parts of naphthenic acid, 2.0-20.0 parts of N-dilauroyl ethylenediamine sodium triacetate, 1.0-20.0 parts of coconut oil disodium polyoxyethylene sulfosuccinate and sodium hydroxide in an amount which is 0.2 times the total parts by weight of the gutter oil fatty acid and the naphthenic acid. The preparation method of the anionic collector comprises the following steps: stirring the gutter oil fatty acid, the naphthenic acid and the sodium hydroxide for 40-45 minutes at 85-95 DEG C to perform saponification; saponifying for 5-10 minutes after cooling to 30-40 DEG C, adding the N-dilauroyl ethylenediamine sodium triacetate and the coconut oil disodium polyoxyethylene sulfosuccinate, stirring for 5-10 minutes and curing to obtain the anionic collector. According to the method, ore concentration is performed at the normal temperature of 20-25 DEG C, so that the energy consumption is reduced, the energy is saved, the environment is protected, the cost is low, the collection capacity is high, the selectivity is good, the operation concentrate grade is kept, the operation recovery rate is improved, the cost of a flotation reagent is reduced, the waste cooking oil fatty acid is used as a raw material, and a new approach is developed for recycling of gutter oil.

The invention discloses a high temperature resistant oil-in-water emulsifier with high performance. The oil-in-water emulsifier is prepared through the following steps: adding 850-860kg of illegal cooking oil into a 2000L enamel reactor, then adding 510-520kg of tetraethylenepentamine and 25-30kg of 20% sodium hydroxide aqueous solution, introducing steam by a jacket for heating and starting up stirring; in the process of raising the temperature, recovering water generated by reaction by a condensing reflux water division device, and beginning to boil a reaction material when the temperature is raised to 180-190 DEG C, continuously raising the temperature, keeping the temperature at 230-250 DEG C to heat for 40min, then stopping heating, and reducing the temperature by introducing coolingwater through the jacket; and cooling the reaction material to the room temperature, and then discharging and barreling. The reasonable utilization of wastes is realized, the illegal cooking oil harmful to human bodies is prevented from entering fast-food restaurants and wineshops, and an environment-friendly, healthy and safe solution is provided for solving the illegal cooking oil problem.

The invention relates to a method for measuring doped gutter oil in edible vegetable oil. The method comprises the following steps of (1) deriving of a vegetable oil sample: deriving the vegetable oilsample by a 2,4-dinitrophenylhydrazine deriving solution; (2) drawing of an external standard working curve; (3) detection of the sample. The invention also relates to application of a reaction product (aldehyde phenylhydrazone) of fatty aldehyde and 2,4-dinitrophenylhydrazine to detect the doped gutter oil in the edible vegetable oil.

The invention discloses a method for preparing biodiesel with low sulfur content from gutter oil. The method comprises a series of procedures as follows: pretreatment, esterification reaction, vacuum impurity removal, transesterification, glycerin separation and dealcholization as well as distillation refining. According to the technology, sulfur-containing substances are not introduced into the whole technological process except raw gutter oil materials in production while concentrated sulfuric acid is commonly used as a catalyst in the esterification reaction in the prior art; the vacuum impurity removal process is added before the transesterification process, impurities (including sulfur-containing impurities) with low boiling point are removed in advance, so that the sulfur content of a product is further reduced, and content of ester is increased.

The invention discloses a gutter oil glycerol esterification method, and belongs to the biological chemical industry field, and the method includes the following conditions: glycerol addition amount is 5% to 9%, NaOH addition amount is 0.01% to 0.1%, and the reaction time is at least 3 hours. Preferably, a catalyst can be used, and the catalyst is 0.4% of zeolite. Preferably, a catalyst can be used, and the catalyst is a mixture of 0.3% of zeolite and 0.2 % of ZnO. Preferably, the glycerol addition amount is 5%. Preferably, the reaction time is 5 hours. Preferably, the NaOH addition amount is 0.05%. Beneficial effects are as follows: through gutter oil glycerol esterification for acid reduction, biodiesel synthesis yield is greatly increased, and through the best operating process of the method, the yield can be greatly improved.

The invention discloses a time resolution fluorescence immunoassay method and kit for fast detecting gutter oil. The method starts with the germ types massively propagated in the gutter oil, and advantageous germs polluting the gutter oil are analyzed, and specific components of the advantageous germs are determined to achieve the aim of identifying the gutter oil; the research method is very unique; lipopolysaccharide of the advantageous germs in the gutter oil is used for screening monoclonal antibodies and a TRFIA detection method of the lipopolysaccharide is established. The method has the advantages of high specificity and high detection sensitivity for the gutter oil, and has very important significance in identification and detection of the gutter oil.

The invention discloses a combined treatment method and system for food waste, excrement, illegal cooking oil and kitchen waste. The method comprises the following steps: 1) pretreating the food waste, the illegal cooking oil and the kitchen waste to separate out inorganic impurities, carrying out crushing, carrying out pulping, and separating out grease, organic solid matter and concentrated water; 2) carrying out anaerobic fermentation on the organic solid matter and the concentrated water to generate biogas and obtain biogas residues, biogas slurry and odor, and carrying out deodorization on the odor; 3) carrying out solid-liquid separation on the excrement and the biogas residues to obtain garbage, impurities and sewage; and 4) carrying out sewage purification treatment on the biogas slurry and the sewage to obtain sludge and water meeting an emission standard. The method and system provided by the invention jointly treat the food waste, the excrement, the illegal cooking oil and the kitchen waste, reduce the operation costs, save labor, share related facilities to a maximum extent, and improve the project profit capacity.

The invention relates to the technical field of recycling of renewable resources, oil processing and electric insulation materials and provides a method for preparing electric insulation oil from gutter oil. The method comprises steps as follows: S1, combined degumming; S2, decoloration and impurity removal; S3, vacuum steam stripping; S4, compounding and alkali refining; S5, water washing and soap removal; S6, dry fractionation. According to the combined degumming technology, hydratable phospholipids and non-hydratable phospholipids can be effectively removed simultaneously, the degumming efficiency is high, the settling effect is good, and the refining effect of the following process is facilitated; through cooperation of vacuum steam stripping with compounding and alkali refining, the acid value of oil can be substantially reduced; through dry fractionation, the condensation point of oil can be further reduced according to specific demands.

The invention relates to a detection method of adulterated oil and gutter oil. The method comprises steps of establishing a qualified grease and gutter oil sample base; implementing 1H nuclear magnetic resonance (NMR) detection to qualified grease samples, obtaining spectrograms of the grease samples, and calculating mass percentages of saturated fatty acid triglyceride, oleic acid triglyceride, linoleic acid triglyceride and linolenic acid triglyceride in each grease, determining a relative error of the four fatty acid triglycerides in greases of the same kind, and obtaining a proportional range of the mass percentages of the four triglycerides in greases of the same kind; adding to and establishing a mass percentage database of four triglycerides of qualified greases; implementing 1H NMR (1H Nuclear Magnetic Resonance) detection to a gutter oil sample, calculating mass percentage and proportion of four triglycerides, and establishing a mass percentage database of the four triglycerides of the gutter oil; carrying out same detection and calculation to a grease sample to be detected, and comparing an obtained proportion with proportions in two database, so as to judge whether the qualified grease is adulterated oil or gutter oil.

The invention provides an edible oil identification method with high identification ability. According to the technical scheme, a two-dimensional synchronous correlation and / or two-dimensional asynchronous raman spectra reflecting a C-H stretching vibration change mechanism can be extracted by adopting a temperature change control technology, and oil sample identification is performed by hierarchical cluster analysis. The method has the characteristics of small sample usage amount, no need of pretreatment, sample nondestructive property, simple and convenient operation, rich fingerprint information, high identification ability and the like, can rapidly identify authentic edible oil and refined illegal cooking oil, has extremely high identification ability on a doped oil sample with a mass ratio of the doped illegal cooking oil being as low as 5%, can obviously improve the identification efficiency and persuasive power to fake edible oil and has significances for cracking down on the fake edible oil and guaranteeing the public health safety.

The invention relates to a method for decoloring biodiesel prepared from gutter oil. The method comprises the following steps: 1, preparing biodiesel from gutter oil through ester exchange; 2, decoloring: adding 100g of biodiesel to a 250ml flask, adding hydrogen peroxide which is 5-25% oil weight in mass percentage, wherein heating temperature is 70-90 DEG C, stirring, reacting for 18-25min, centrifuging and reserving an upper phase; 3, calculating a decolorization ratio: respectively adding the obtained grease in a 1.0cm cuvette, and implementing absorption spectrum scanning on 465nm, wherein the decolorization ratio is defined as a ratio of a difference in absorbance indexes before and after biodiesel decolorization to an absorbance index before decolorization. The method has the beneficial effects that the method, through a hydrogen peroxide oxidation process, has an obvious decolorization effect on deep-color biodiesel prepared from the gutter oil. And the decolorization method is simple to operate, high in decolorization speed and high in recovery efficiency, and the biodiesel decolorized by the method has no large difference with the biodiesel before decolorization in both physical and chemical property.

The invention discloses a preparation method of an illegal-cooking-oil-base water-based paint, which comprises the following steps: (1) preparing purified illegal cooking oil; (2) sequentially adding deionized water, a pH regulator, an emulsifier, a dispersing agent, an initiator, the purified illegal cooking oil and acrylate into a reaction kettle to prepare an illegal cooking oil pre-emulsified liquid; and (3) adding deionized water, a tackifier, a thickener and an ultraviolet absorbent into the illegal cooking oil pre-emulsified liquid to obtain the illegal-cooking-oil-base water-based paint. The preparation method is simple to operate, and has the advantages of wide raw material sources and low cost. The coated film has favorable adhesiveness for external wall substrates of mortar and the like. The coating has the advantages of low peeling tendency, no crack, high strength, favorable toughness and the like. The paint can be widely used for decorating various external walls.