92results about How to "Lower cold filter point" patented technology

The invention provides a method for preparing a diesel oil component or jet fuel component by using animal and plant oil. The method comprises the following steps of: (1) dividing the animal and plant oil into at least two parts, introducing the at least two parts of animal and plant oil to a plurality of catalyst beds of a first hydrogenation reactor, and enabling the at least two parts of animal and plant oil and a hydrodeoxygenation catalyst to contact and react to obtain n-alkanes with the carbon number of 8-24; (2) filling an isomerization catalyst in a second hydrogenation reactor, introducing a reaction product obtained in the step (1) to the second hydrogenation reactor, and reducing a condensation point after isomerization reaction to obtain a diesel oil component; or, (3) filling a selective cracking catalyst in the second hydrogenation reactor, introducing the reaction product obtained in the step (1) to the second hydrogenation reactor, and then, carrying out selective hydrocracking and isomerization to obtain a jet fuel blending component. The method provided by the invention is high in jet fuel yield; and the prepared jet fuel blending component is good in quality and can be mixed with the traditional petroleum-based jet fuel according to any proportion so as to be an excellent blending component.

The invention discloses a methanol diesel fuel complex additive and a preparation method thereof. The complex additive is prepared from the following raw materials in parts by volume: 1-4 parts of diethyl phthalate, 1-8 parts of n-butylamine, 1-9 parts of isooctanol, 1-6 parts of cyclohexanone, 13-42 parts of lauryl methacrylate, 7-30 parts of mixed fatty glyceride, 1-5 parts of phenyl propargyl ether, 1-8 parts of dihexadecyl dimethyl ammonium chloride, 2-12 parts of ethyl formate, 2-14 parts of isooctyl nitrate and 1-6 parts of polyoxyethylene hexadeeylalkyl ether selies. The methanol diesel fuel complex additive can enable methanol diesel fuel to be evenly mixed and to be stably stored for more than 6 months, which effectively improves the fire behaviour of the methanol diesel fuel and inhibits the volatilization when the methanol content is higher; moreover, the production process is simple and the use is convenient, thereby being beneficial to the popularization and application of the methanol diesel fuel.

The invention provides a diesel pour point depressant which comprises the components by weight percent: (1) 20-30% of alkenyl butanediamide acid salt, (2) 15-20% of alpha-olefin and maleic anhydride copolymer, (3) 10-20% of ethylene-vinylacetate and (4) 30-50% of organic solvent. The diesel pour point depressant has better sensitibility for most diesel oil produced in China, low dosage and remarkable effect of reducing condensation point and cold filter plugging point. The invention also provides a preparation method of the diesel pour point depressant.

A composite pour depressor for diesel oil is prepared through polymerizing reaction of styrene on maleic acid anhydride in organic solvent at 80-90 deg.C for 3-5 hr under action of trigger (peroxide or azo compound), open-loop esterifying reaction on primary alcohol at 130-160 deg.C for 3-7 hr under the existance of catalyst (toluenesulfonic acid or sulfuric acid), and mixing with the toluene or xylene arylhydrocarbon solvent. Its advantage is high pour depressing effect.

The invention relates to a harmonic ingredient of high-power clean diesel oil, which is prepared by a cetane accelerant, a pour point depressant, a wear-resistant lubricant, a detergent dispersant, an oxidation stabilizer, a cosolvent and the like. The harmonic ingredient is based on improving the quality of the diesel oil, increasing the oil yield and reducing the production process, integrates assistants required in a harmonic process of the diesel oil, has the functions of reducing coagulation, increasing the cetane number of the diesel oil, improving lubrication and oxidation stability, cleaning efficiently and resisting static electricity, is non-toxic, free from heavy metal, low in addition and convenient to use, and can increase the power of the diesel oil greatly, reduce hazardous substance discharge of an automobile and reduce engine noise; the product quality is stable, the production process is simplified, the production and detection costs are lowered, and the mutual effect is controllable during production of an oil refinery; the quality of an oil product can be improved greatly for a refinery enterprise; and the benefit is improved.

The invention relates to a lubricating anti-wear diesel start protection additive, belonging to the field of diesel additives. The additive comprises the following components in percentage by weight: 5-10% of low-molecular ether A, 10-20% of combustion improver B, 5-15% of detergent C, 10-30% of pour point depressant D, 10-30% of cetane number improver E and 10-60% of solvent F. The additive produced by a conventional production process is added into diesel at a concentration proportion of 800-4,000ppm, and the cold filter plugging point of the diesel can be remarkably reduced while the fluidity, lubricating property, combustibility and start protection of the diesel can be improved.

The invention relates to the technical field of pour point depressants and particularly relates to the technical field of a diesel oil pour point depressant. The diesel oil pour point depressant is prepared from the following raw materials in parts by weight: 40-60 parts of high polymethacrylate, 20-30 parts of polyethylene vinyl acetate, 30-40 parts of polyethylene glycol, 10-20 parts of alkyl glycoside and 15-25 parts of sodium polyaspartate. According to the diesel oil pour point depressant disclosed by the invention, the pour point depression effect is remarkably improved, the cold filter plugging point and pour point of all diesel oil can be effectively lowered, particularly the sensitivity to high-wax-content and narrow-fraction diesel oil is relatively good, the flowing property of the high-wax-content and narrow-fraction diesel oil is better improved under low-temperature conditions, the diesel oil pour point depressant is environment-friendly and has an excellent market value, and the problems of the existing diesel oil pour point depressants in China petrochemical industry that the pertinence is high, the performance is single and the broad-spectrum performance is poor are solved.

The invention relates to the technical field of chemical industry, and relates to a low-temperature fluidity improver for diesel oil, in particular to the low temperature fluidity improver for diesel oil, which is capable of significantly reducing the cold filter plugging point of the diesel oil. The low-temperature fluidity improver is obtained by compounding a proper main agent and proper auxiliary agents and then uniformly mixing. The low-temperature fluidity improver with the ratio is better in sensitivity for most of diesel oil, and particularly can reach better decompression effect for the diesel with higher wax content and narrower boiling range.

This invention is a preparation method of diesel oil-flowing improver, including: in azotes atmosphere and the organic agent containing 10-100% ethanol polymerize non-saturable amide and acroleic acid alkyl ester under 60-84deg.C. The alkyl carbon chain of the acroleic acid alkyl ester is C6-C24. The non-saturable amide is selected from acrylamide, methacrylamide, N-hydroxyl monomer. The mole ratio of acroleic acid ester and non-saturable amide is 0.1-3:1. All agents are ethanol or the mixtures of ethanol and the apolar solvents such as petroleum, benzene, methylbenzene, xylene and etc. The characteristic of this invention is that it uses the ethanol organic solvent as polymerization reaction solvent, so the diesel oil-flowing improver has good utilization effect, fine anti-wax deposition, and effectively lowers the cooling point of diesel oil and has good effect on the narrow cuts diesel oil with high wax contents.

The invention discloses a method for preparing low-cold-filter-plugging-point biodiesel, which comprises the following steps: (1) preparing free fatty acids by hydrolysis of raw material grease; (2) separating free fatty acids by a urea clathration process to obtain a fraction containing rich saturated fatty acids and fraction containing rich unsaturated fatty acids; and (3) performing esterification reaction of the fraction containing rich saturated fatty acids, which are obtained by the step (2), with short-chain alkanols and the esterification reaction of the fraction containing rich unsaturated fatty acids, which are obtained by the step (2), with methanol, uniformly mixing the two parts of fatty acid esters obtained by the reactions uniformly and obtaining the biodiesel with improvedlow-temperature flowing property. The method for improving the low-temperature flowing property of the short-chain alkanol biodiesel is simple in operation, is highly adaptive to raw material oils, and can realize high utilization rate; and the physical and chemical properties of the product prepared by the method meet the specified values of standards for biodiesel.

The invention discloses a biodiesel pour point reducer composition containing a Tween surfactant and a preparation method thereof. The biodiesel pour point reducer composition containing the Tween surfactant is formed by mixing Tween series surfactants and a biodiesel pour point reducer, wherein the materials comprise the following components by weight percent: 5 to 10 percent of Tween 20, 0 to 5 percent of Tween 40, 5 to 10 percent of Tween 60, 40 to 60 percent of Tween 80 and 0 to 50 percent of biodiesel pour point reducer. The preparation method comprises the following steps of: mixing the raw materials and stirring the raw materials in a thermostatic water bath condition, and controlling the rotating speed to 300 revolutions per minute for 15 minutes so as to obtain the biodiesel pour point reducer composition containing the Tween surfactant. The biodiesel pour point reducer composition is added into biodiesel, so that the cold filter plugging point of the biodiesel is reduced by 7 to 12 DEG C, the condensation point of the biodiesel is reduced by 7 to 13 DEG C, and the low temperature fluidity of a biodiesel product is improved.

The invention discloses a diesel oil pour point depressant composition as well as a preparation method and application thereof. The diesel oil pour point depressant composition is prepared from the following components by mass percent: 40-60% of benzyl methacrylate-tetradecyl methacrylate, 5-25% of benzyl methacrylate-hexadecyl methacrylate, 5-20% of benzyl methacrylate-octadecyl methacrylate, 5-25% of span 80 and 10-30% of xylene. The diesel oil pour point depressant composition provided by the invention not only can effectively enhance the solubility of a pour point depressant in diesel oil,but also can effectively improve the low temperature flow performance of the diesel oil. After the obtained diesel pour point depressant composition is added into the commercially available diesel oil with model 0, the condensation point and cold filter point of the diesel oil with model 0 are respectively lowered by 22-26 DEG C and 8-11 DEG C, and the other properties of the diesel oil with model 0 can reach the national standards; the diesel oil pour point depressant composition can meet the requirement that various diesel-powered motor vehicles work normally at the low temperature.

The invention relates to a preparation method of diesel oil low temperature flow properties improver. The method includes the following steps that: in the presence of a catalyst, ethylene-the vinyl acetate-vinyl alcohol copolymer and C8-C18 fatty acids are subjected to esterification at a temperature of from 130 to 160 DEG C to obtain intermediate products; alicyclic amine is added to carry out in situ amination so as to obtain ingredient A; acrylic acid reacts with high carbon of fatty alcohols to produce acrylate high esters, wherein a catalyst is concentrated sulfuric acid and a polymerization inhibitor is hydroquinone; acrylate high esters reacts with alpha olefins, maleic anhydride and alicyclic amine to produce ingredient B, wherein the reactants are in equimolar ratio; ingredient C is phosphoric acid diisooctyl ester or dicapryl phthalate; the improver is mixed by the following ingredients: by weight, 40-45% of the ingredient A, 35-40% of C9, 15-20% of the ingredient B, and 5-8% of the ingredient C. Cold filter plugging point (CFPP) and condensation point of the diesel oil can be effectively reduced. Yield of light oil can be raised and cloud point of the diesel oil can be reduced. The effects on the diesel oil containing high wax are obvious.

The invention relates to a biodiesel pour-point depressant, its preparation method and application. The biodiesel pour-point depressant comprises a mixture consisting of 3-30 wt% of alfa-OH polyester compounds and 70-97 wt% of poly alkyl methacrylate. The biodiesel pour-point depressant has good depressive effect on biodiesel, petrochemical diesel oil, or mixtures of biodiesel and petrochemical diesel oil, and especially has good effect of lowering the cold filter plugging point.

The invention discloses a broad-spectrum biodiesel oil pour point depressant and a preparation method thereof. The broad-spectrum biodiesel oil pour point depressant is prepared by mixing ethyl acetoacetate biodiesel oil pour point depressant composition with polymethyl methacrylate according to a mass ratio of the ethyl acetoacetate biodiesel oil pour point depressant composition to polymethyl methacrylate of (1-3) to 1. The preparation method comprises the following steps: stirring and mixing the ethyl acetoacetate biodiesel oil pour point depressant composition and polymethyl methacrylate to obtain the broad-spectrum biodiesel oil pour point depressant. The obtained broad-spectrum biodiesel oil pour point depressant is good in pour point depression effect and also can be applied to general diesel oil.

The invention discloses a method for preparing a low temperature epoxy fatty acid branched-chain alcohol ester improver for biodiesel and application thereof. The method comprises the steps of taking natural oil and branched-chain alcohol as raw materials to react in the presence of a catalyst, and carrying out distilling, standing and layering on the product to obtain supernatant fatty acid branched-chain alcohol ester; and then mixing the fatty acid branched-chain alcohol ester with formic acid, adding an epoxidation catalyst, reacting while dropwise adding hydrogen peroxide, and carrying out standing, layering, neutralizing and dewatering on the product to obtain epoxy fatty acid branched-chain alcohol ester. The invention develops an epoxy fatty acid branched-chain alcohol ester improver aiming at the characteristics of biodiesel. The method has the following beneficial effects: by branching bonds of fatty acid ester and introducing a polar group onto the interior double bond structure of the fatty acid ester, the improver can be easily mixed with the biodiesel to form uniform solution, thus being beneficial to blocking further growth of solid crystals; and after different oil-based biodiesels and the improver are mixed, the low temperature fluidity of the biodiesels can be obviously improved, the condensation point and cold filter point can be reduced by 5-15 DEG C, the calorific value can be improved, and the viscosity can be reduced.

The invention provides a diesel oil pour point depressant, which comprises the following components in percentage by mass: 20 to 40 percent of phenylethylene-maleic anhydride copolymer fatty ester, 40 to 60 percent of poly alpha-methacrylic acid fatty ester and 20 to 40 percent of alkyl naphthalene. The diesel oil pour point depressant of the invention can obviously improve the low-temperature rheological property of the diesel oil and reduce the cold filter plugging point of the diesel oil.

The invention discloses a polymethacrylate / graphene nano composite polymer pour point reducer and a preparation method thereof. The method comprises the following steps: (1) ultrasonically dispersing graphene oxide in an organic solvent to obtain a suspension; then adding methacrylate and an initiator into the suspension, and performing a polymerization reaction at 70 to 90 DEG C in an inert atmosphere to obtain a viscous material; and (2) adding a reducing agent into the viscous material to reduce the graphene oxide, and after the reaction is ended, performing the after-treatment to obtain the polymethacrylate / graphene nano composite polymer pour point reducer. The preparation method is simple and feasible, easy in operation, and high in safety; the obtained pour point reducer is stable in performance and excellent in pour point reduction effect; and moreover, the graphene has flammability, does not block a filter screen of an engine, and is not deposited at the bottom of the engine. The polymethacrylate / graphene nano composite polymer pour point reducer is applied to Number-0 diesel, and a cold filter plugging point and a condensation point of the number-0 diesel can be respectively decreased by 6 to 15 DEG C and 12 to 23 DEG C.

The invention discloses an acetate solvent based diesel oil pour point depressant composition, a preparation method and an application of the acetate solvent based diesel oil pour point depressant. The acetate solvent based diesel oil pour point depressant composition comprises the components by mass percent: 0-10% of ethyl acetate, 0-20% of propyl acetate, 20-40% of butyl acetate, 0-20% of amyl acetate and 10-30% of diesel oil pour point depressant. The preparation method comprises the steps of: mixing all the raw materials and stirring in thermostatic water bath; and controlling the rotating speed to be 120r / min to obtain the acetate solvent based diesel oil pour point depressant 30minutes later. The acetate solvent based diesel oil pour point depressant composition improves the dispersive action of the diesel oil pour point depressant for wax crystals at the low temperature, and improves the low-temperature fluidity of oil products; and the acetate solvent based diesel oil pour point depressant composition can be added into commercially available 0-model diesel oil, so that the cold filter plugging point is reduced by 5-11 DEG C, and the condensation point is reduced by 6-10 DEG C.

The invention relates to the technical field of petrochemical engineering, and particularly relates to a smoke-eliminating antifreezing agent for diesel oil. The antifreezing agent is prepared from the following raw materials in parts by weight: 20-35 parts of polymethacrylate, 10-20 parts of sodium gluconate, 8-17 parts of Fe(C5H5)2, 10-20 parts of polyethylene glycol, 20-30 parts of glycerol, 1-5 parts of polytetrafluoroethylene, and 10-18 parts of alkyl glycoside. The smoke-eliminating antifreezing agent for diesel oil disclosed by the invention can keep continuously supplemental firing, and can significantly reduce the condensation point and cold filter plugging point of diesel oil, prevent the diesel oil from being frozen at low temperature, clean parts, improve the effect of smoke elimination, and reduce the emission of exhaust gas.

The polymer has structural expression as shown in (I). Acrylic acid, methacrylic acid, butyl acrylate and styrene are made to react at 50-100 deg.c under irradiation of irradiation source for 1-5 hr to obtain copolymer. The copolymer is then reflux esterified, amidized and aminated with C12-C24 fatty alcohol, C10-C22 fatty amine and C16-C18 fatty secondary amine in the presence of toluene sulfonic acid or sulfonic acid type strong acid ion exchange resin as catalyst to obtain the destination product. The copolymer of the present invention as the diesel oil low temperature flowability improver can lower both the solidification point and the cold filter plugging point of diesel oil. In addition, the irradiation polymerization process of the present invention is superior to available polymerization process, which needs water washing resulting in emulsification, lowered yield, environmental pollution and other demerits.

The invention relates to the field of oil additives, and particularly relates to a preparation method of a diesel oil pour point depressant containing a styrene-fumaric acid copolymer. The preparation method comprises the steps of aggregation, mono-esterification, dual-esterification and mixing. The diesel oil pour point depressant containing the styrene-fumaric acid copolymer has the good effect of stably dispersing microcrystal, is capable of relatively effectively reducing the condensation point and the cold filtering point of diesel oil, and improves the susceptibility on diesel oil with different resources; by taking the diesel gross as a reference, after the diesel oil pour point depressant disclosed by the invention is added to the 0# diesel oil with the different resources according to the adding amount of 700ppm, the cold filtering point be reduced by 7 DEG C to the greatest extent, and after the diesel oil pour point depressant disclosed by the invention is added to the 10# diesel oil with the different resources according to the adding amount of 700ppm, the cold filtering point of the 10# diesel oil can be lowered by 5 DEG C to the greatest extent.

The invention discloses a preparation method of a diesel oil additive, the prepared diesel oil additive and an application of the diesel oil additive; the diesel oil additive is prepared by mixing maleic anhydride, acrylic acid ester, methyl oleate, an initiator and an organic solvent, then carrying out a polymerization reaction to obtain a maleic anhydride-acrylic acid ester-methyl oleate ternary copolymer as the diesel oil additive, wherein the molar ratio of the maleic anhydride to the acrylic acid ester to the methyl oleate is 1 to (0.5-3) to (0.5-3), the acrylic acid ester is obtained by esterification of acrylic acid and C12-C18 alcohol. The diesel oil additive is added to vehicle diesel oil, not only can play a role in reducing the diesel oil cold filter plugging point and improving the low-temperature flowing properties of the diesel oil, but also can improve the antiwear lubricating properties of low-sulfur diesel oil.

A diesel oil cold filter clogging temperature improving agent and preparation method thereof belongs to the diesel oil additive field, aiming at solving the problem of rebound in the additive diesel oil cold filter clogging temperature. The invention is composed by 55-85 weight percent of quadripolymer and 15-45 weight percent of surfactant by optimization and formulation; wherein the quadripolymer is prepared by the steps that: under the action of compound initiating agent, solvent is added with maleic acid mixed alcohol ester, fumaric acid mixed alcohol ester, vinyl acetate and acrylic acid mixed alcohol ester for radical solution polymerization, the mol ratio of reactants is 1:1:1:1 to 1:1:8:8, the dosage of the compound initiating agent is 0.5-1.5% of the total weight of monomer, the dosage of the solvent is 150-300% of the total weight of the monomer, temperature rises to 70-90 DEG C by heating, and reaction is carried out for 4-6 hours. The invention can cause the cold filter clogging temperature of diesel oil with high wax content and narrow fraction to be reduced by 3-6 DEG C, and the cold filter clogging temperature of diesel oil can not rebound within 90 days.

The invention discloses an anti-wear combustion-supporting dual-effect diesel additive and a preparation method thereof. The additive comprises triethanolamine triethyl ester, and the cetane number ofthe triethanolamine triethyl ester is 51 or above. The additive provided by the invention obviously improves the cetane number and the lubricity of diesel oil. The diesel additive provided by the invention meets the requirements of high cetane number, low aromatic hydrocarbon content, low density and low sulfur content in the future development of diesel and has a broad application prospect. Thediesel oil additive has good intersolubility with diesel oil and can also reduce the cold filter plugging point of the diesel oil and improve the lubricity. After the additive is added, combustion ofthe diesel oil is basically not influenced, and polluted toxic exhaust gas is not discharged. In addition, the polarity of functional groups containing oxygen atoms is strong, so that the additive hasgood surface extreme pressure wear resistance.

The invention relates to a diesel oil pour point depressant composition. The diesel oil pour point depressant composition comprises, by mass, 40-60% of benzyl methacrylate-maleic anhydride tetradecylamine, 10-30% of benzene solvent, 5-20% of polyethylene glycol, 10-30% of Tween. A preparation method of the diesel oil pour point depressant composition includes: S1, evenly mixing the ingredients by stirring at a temperature of 25-40 DEG C to obtain a primary mixed solution; S2, dispersing the primary mixed solution with an ultrasonic generator to obtain the diesel oil pour point depressant composition. Compared with the prior art, the diesel oil pour point depressant composition has the advantages of wide application range and can be applied to all diesel oil in the current market, dispersity of the pour point depressant in 0# diesel oil sold in the market can be improved, a condensation point of the 0# diesel oil can be lowered by 20-25 DEG C, and a cold filter plugging point of the 0# diesel oil can be lowered by 6-11 DEG C.

The invention discloses a biodiesel pour point depressant, belonging to the field of oil additives. The biodiesel pour point depressant is prepared from the following raw materials in percentage by mass: 50-70% of higher polymaleate-styrene-acrylamide, 10-15% of a surfactant and 15-40% of dimeric acid amide. A preparation method of the biodiesel pour point depressant comprises the following steps: firstly, adding higher polymaleate-styrene-acrylamide; then, adding the surfactant span and tween in sequence; and finally, adding dimeric acid amide to formulated amount, and sufficiently stirring and mixing to obtain a compound product, namely the biodiesel pour point depressant. The biodiesel pour point depressant disclosed by the invention can be used for promoting the solubility of the pour point depressant in oils and improving the low-temperature flowing property of the biodiesel.

The invention provides a reagent for reducing the condensation point of diesel, and a preparation method and an application thereof. The reagent for reducing the condensation point of diesel comprisesa tetradecyl methacrylate-N-vinylpyrrolidone copolymer, or comprises the tetradecyl methacrylate-N-vinylpyrrolidone copolymer and a tetradecyl methacrylat-N-vinylimidazole copolymer. The above polymer diesel pour point depressant can further improve the low-temperature fluidity of the diesel, and has the advantages of simple synthesis method, small dosage, and small use amount of raw materials. The condensation point of diesel containing the reagent is 24-26 DEG C less than that of diesel free from the pour point depressant, and the cold filter plugging point of the diesel containing the reagent is 9-11 DEG C less than that of the diesel free from the pour point depressant, so that the diesel has a good fluidity at a low temperature.

The invention discloses bus biodiesel and a preparation method. The bus biodiesel is formed by adding pour point depressant to mixed diesel formed by mixing gutter oil biodiesel with mineral 0# diesel and then evening mixing the mixture; in percentage by volume, the amount of the pour point depressant comprises to the amount of mixed diesel is 5%-25%: 75%-95%; in percentage by volume, the content of gutter oil biodiesel in the mixed diesel is 10%-50% and the content of the mineral 0# diesel is 50%-90%. According to the preparation method, gutter oil is used as a raw material, graphene oxide is used as a catalyst to catalyze the gutter oil to have transesterification with methanol, the obtained gutter oil biodiesel is mixed with the 0# diesel, the pour point depressant is added, and the bus biodiesel is obtained. Compared with 0# automotive diesel, the cold filter plugging point, the pour point, the cloud point, the closed-cup flash point, the kinematic viscosity, the oxidation stability, the calorific value, the density, the acid value and the like of the bus biodiesel conform to related automotive diesel standards.

The invention relates to a surfactant compounded pour point depressant. The surfactant compounded pour point depressant is prepared from the following components in percentage by mass: 40-60% of tetradecyl methacrylate-maleic anhydride-aniline, 10-30% of arlacel, 15-20% of tween and 10-20% of 1-methylnaphthalene. A preparation method of the surfactant compounded pour point depressant comprises thesteps: S1, all the components are mixed according to the proportion and evenly stirred, and thus a primary mixed solution is obtained; and S2, the primary mixed solution is dispersed again through anultrasonic generator, and thus the surfactant compounded pour point depressant is obtained. Compared with the prior art, the pour point depressant composition of diesel oil is wide in application range and can be suitable for all diesel oil in the current market, the dispersity of the pour point depressant in the 0# diesel oil available in the market can be improved, the condensation point of thediesel oil can be decreased by 20-26 DEG C, and the cold filter plugging point of the diesel oil can be decreased by 5-9 DEG C.