170 results about "Cold filter plugging point" patented technology

The invention discloses a pour point depressant for diesel oil, wherein polymethylacrylic acid higher ester is used as a host agent, and an arene compound, span, twain and a polar nitrogen-containing compound are used as an assistant. The substances are uniformly mixed and used for effectively reducing the cold filter plugging point of all diesel oils, and are especially better in perceptibility to diesel oils with high wax content and narrow fraction. In low temperature condition, the flowing property of diesel oils with high wax content and narrow fraction is better increased. The pour point depressant is simple to prepare, low in cost and remarkable in effect, has excellent market value, and can be used for solving the problem that the pour point depressant for diesel oil in the petrochemical industry in China is strong in pertinence, single in function and poor in broad spectrum.

The invention belongs to the field of diesel additive and particularly relates to a diesel pour point depressant and a method for preparing the diesel pour point depressant. The diesel pour point depressant overcomes the defects of the prior pour point depressant and can be used for greatly reducing the cold filter plugging point and the pour point of diesel. In addition the diesel pour point depressant can be widely applied to various diesels, thereby having low limitation.

The invention discloses a diesel oil pour point depressant composition and its preparation method. The diesel oil pour point depressant composition, i.e. a diesel oil pour point depressant composition formed by mixing acetic ester organic solvents with a pour point depressant, comprises the following raw materials by mass percent: 0-20% of methyl acetate, 0-20% of ethyl acetate, 0-10% of propyl acetate, 0-30% of butyl acetate, and 20-80% of the pour point depressant. The preparation method consists of: mixing all the raw materials and then conducting stirring in water bath at a constant temperature of 50DEG C for 20min, and controlling the rotation speed at 150r/min, thus obtaining the diesel oil pour point depressant composition. Adding of the obtained diesel oil pour point depressant composition into commercially available 0# diesel oil can make the cold filter plugging point of the diesel oil reduced by 5-11DEG C and the condensation point reduced by 6-10DEG C. The diesel oil pour point depressant composition provided in the invention enhances the dispersion effect of pour point depressants on wax crystals, and improves the low temperature fluidity of diesel oil.

The present invention is a process for producing a distillate fuel heavier than gasoline. The process is a Fischer-Tropsch (hydrocarbon synthesis) process that includes using 13C NMR to measure cetane number and a cold flow property in order to optimize the process. Cold flow properties include cold filter plugging point, cloud point and pour point.

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.

The invention provides a method for utilizing waste oil to produce bio-diesel, which regards waste animal and vegetable oil as raw materials, in the producing process, no water-washing is needed, and the method consists of the following steps, first, pretreatment, degumming and dewatering the waste oil, second, pre-esterification, heating the raw material after pretreatment, and stirring the material with methyl alcohol and acid catalyst for reaction, third, alcoholysis, adding methyl alcohol and organic alkali catalyst into the material after pre-esterification for heating reaction, fourth, glaciation, bio-diesel being got after separation. The method degums the waste oil so as to eliminate the influence of gummy matter towards following steps and assure the stability of the process, saponification is avoided, which can cause waste products in block, and the products can reach the main index of 0<model> diesel, the cold filter plugging point is lower than 0 DEG C, the close flash point is more than 65 DEG C, the conversion rate (utilization rate) after pretreatment can reach more than 90 percent, no water-washing is needed so as not to produce a great amount of industrial wastewater to pollute the environment and the post treatment of products is rather convenient.

The invention discloses a wide-spectrum diesel pour point depressant composition, a preparation method thereof and an application of the composition. The pour point depressant composition comprises, in weight percent, 30-80% of benzyl methacrylate-methacrylic acid tetradecyl ester copolymers, 10-40% of arene oil, 5-50% of 1-methylnaphthalene and 5-30% of polar nitrogen-containing compounds. The raw materials are uniformly mixed according to predetermined weight percent to obtain the composition. The diesel pour point depressant composition can be rapidly dissolved in diesel oil, is high in spectrum and has remarkable pour point declining effect when being applied to different diesel, and a condensation point and a cold filter plugging point are reduced by 21-26 DEG C and 8-12 DEG C.

The invention discloses a pour point depressant composition suitable for biodiesel and petroleum diesel blend oil, a preparation method and application of the pour point depressant composition. The pour point depressant composition is formed by mixing phthalic acid ester type organic solvent, acetate type organic solvent and diesel oil pour point depressant. Specifically, the pour point depressant composition is prepared from 0-15 wt% of dimethyl phthalate, 10-30 wt% of diethyl phthalate, 0-10 wt% of dibutyl phthalate, 0-25 wt% of butyl acetate and 20-60 wt% of pour point depressant. By evenly mixing and stirring all the components at normal temperature and normal pressure and conducting ultrasonic dispersion for 25-30 minutes, the pour point depressant composition is prepared. The pour point depressant composition is particularly suitable for improving low-temperature mobility of biodiesel and petroleum diesel blend oil formed by mixing soybean oil biodiesel and 0# biodiesel at normal temperature and normal pressure, the pour point effect is remarkable, the cold filter plugging point can be reduced by 7-11 DEG C, and the pour point can be reduced by 6-10 DEG C.

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.

A fuel oil heating auxiliary device of a diesel engine has the functions of heating and exhausting, is provided with a control circuit, an electromagnetic gas valve and an exhaust pump device, is installed in front of an oil supply pump of the engine, and is connected with an oil conveying pipe. A small amount of fuel oil is reserved in an electric heating auxiliary device cup, the temperature of the fuel oil reaches above the cold filter plugging point, and the fuel oil is used for low-temperature starting and initial-stage running of the engine. After the engine is started, an oil tank and other oil paths are heated through the residual heat of an antifreezing solution and the tail gas, and therefore stable operation of the engine is achieved. After the engine stops, the liquid level inside the auxiliary device cup is recovered through the functions of the electromagnetic gas valve and the exhaust pump to facilitate the next time of low-temperature starting. Through the technical scheme, the fuel oil heating auxiliary device of the diesel engine has the advantages that the pre-heating time of the engine in the low-temperature starting process is largely shortened; the load of the storage battery is largely reduced; the diesel engine can use diesel with a high condensation point at low temperature, and oil cost is saved; the structure is simple, installation is convenient, the structure of an original fuel oil system is not changed, and the fuel oil heating auxiliary device of the diesel engine can be widely popularized.

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 discloses a nano compound pour point depressant and a preparation method thereof. The nano compound pour point depressant disclosed by the invention is compounded from a nano material and a polymer pour point depressant by a melting and blending method. A montmorillonite nano material modified by cetyl trimethylammonium bromide is compounded with the polymer pour point depressant in a certain mass ratio by adopting the melting and blending method so as to obtain the nano compound pour point depressant. The pour point depression effect of the nano compound pour point depressant is further enhanced on the basis of pour point depression of the original pour point depressant. When the nano compound pour point depressant is applied to 0# diesel oil, the pour point depression effect is superior to that of a commercially available pour point depressant, and the cold filter plugging point and the condensation point are respectively reduced by 12-20 DEG C and 18-26 DEG C.

The invention discloses a method for preparing diesel, in particular to a method for preparing diesel depressant. The method is characterized by comprising the following steps: adding vinylacetate, maleic anhydride and poly methyl methacrylate fatty ester mixture solution to a reaction vessel with stirring and heating devices; dropwise adding compound initiator to a reaction filled with methylbenzene, heating the reaction vessel to 70-120 DEG C, introducing nitrogen until the pressure in the reaction vessel is 0.4-0.9 Mpa, enabling the materials react for 3.5-5.5 hours, putting discharged materials to a distillation vessel, distilling unreacted monomers and solvent to obtain the residual which is vinylacetate, maleic anhydride and poly methyl methacrylate fatty ester ternary copolymer, and preparing the vinylacetate, maleic anhydride and poly methyl methacrylate fatty ester ternary copolymer into the dry diesel depressant. Compared with the prior art, the diesel depressant has more excellent cold filter plugging point and solidifying point decreasing properties. Because the compound initiator is adopted, the reaction temperature is reduced, thus the energy consumption is reduced. Compared with the prior art, the method has the characteristics of low reaction pressure, simple process and obvious decrease of cold filter plugging point of a product, and saves energy.

The invention discloses a pour point depressant composition of biodiesel for a bus and a preparation method of the pour point depressant composition. The pour point depressant composition of the biodiesel for the bus is formed by mixing the following components in parts by weight: 2.5-10 parts of isodecyl methacrylate, 2.5-10 parts of ethyl acetoacetate, and 2.5-10 parts of isooctyl methacrylate. The preparation method comprises the following steps of ultrasonically dispersing isodecyl methacrylate, ethyl acetoacetate and isooctyl methacrylate after uniformly mixing and stirring at normal temperature and normal pressure so as to obtain the pour point depressant composition of the biodiesel for the bus. The pour point depressant composition of the biodiesel for the bus is used for depressing the pour point of the biodiesel for the bus formed by mixing illegal cooking oil biodiesel with 0# fossil diesel at normal temperature and normal pressure; the low-temperature flow property of the biodiesel for the bus can be effectively improved; the cold filter plugging point is reduced by 5-8 DEG C; the condensation point is reduced by 4-8 DEG C; and the pour point is reduced by 6-8 DEG C.

The invention discloses a biodiesel pour point reducer composition as well as a preparation method thereof. The biodiesel pour point reducer composition is composed of span-series surface active agents and a diesel pour point reducer through mixing; and the raw materials are composed of 0-5% of span-20, 0-5% of span-40, 0-5% of span-60, 40-60% of span-80 and 30-50% of the pour point reducer by mass. The preparation method comprises the following steps of: mixing the raw materials, and stirring in aqueous thermostat at the rotation rate of 200 r/min for 10 min to obtain the biodiesel pour point reducer composition. After the obtained biodiesel pour point reducer composition is added into the biodiesel, a cold filter plugging point is reduced by 6-10 DEG C, and a condensation point is reduced by 7-11 DEG C. The biodiesel pour point reducer composition disclosed by the invention enhances exposure level of the biodiesel pour point reducer and a wax crystal, and improves the low-temperature fluidity of a biodiesel oil product.

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 a synthesis method of a diesel fuel depressant. The synthesis method comprises the following steps of: carrying out one-pot polymerization reaction in an initiating agent and a solvent by taking poly-alpha-methylacrylic acid high-carbon alcohol ester, a polar nitrogen compound, vinyl acetic ester and vinyl benzene as raw materials; and mixing a reactant with twain and span to obtain a target product, i.e., the diesel fuel depressant. The synthesis method is free of aftertreatment and simple in process; the synergic initiating agent is adopted to initiate the polymerization reaction, and the raw materials are dropwise added in twice and sufficiently react; the reaction conditions are mild, and the polymerization reaction is carried out in the mixed solvent, so that the reaction temperature range is widened, and the reaction is more easily carried out; and a special raw material proportion is adopted, so that the produced diesel fuel depressant has good perceptibility for diesel fuel with high paraffin content and favorable cold filter plugging point reducing performance, and the low-temperature performance of the diesel fuel is remarkably improved.