48results about How to "Lower condensation point" patented technology

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 preparation method of a diesel oil pour point depressant. The method includes the following steps of firstly, weighing high alcohols, catalyst, polymerization inhibitor and solvent to be sequentially added into a reactor and stirred till solids are completely dissolved, then adding methacrylic acid, and conducting reduced pressure distillation, alkali washing and water washing on the product after reaction ends to obtain methylacrylic acid high-carbon ester; secondly, weighing methylacrylic acid high-carbon ester, maleic anhydride, initiator and solvent to be evenly mixed, conducting reacting at a certain reaction temperature under the protection of nitrogen, adding aromatic amine and catalyst after reaction, changing the reaction temperature for reaction for a certain period of time, conducting reduced pressure distillation on the reaction liquid after reaction ends, then adding an excessive amount of methyl alcohol to generate white precipitates, removing supernate, and conducting washing and vacuum drying on the obtained white precipitates through methyl alcohol to obtain the diesel oil pour point depressant. The prepared diesel oil pour point depressant can remarkably reduce the condensation point of diesel oil and improve the low-temperature flowability of diesel oil; the raw materials are easy to obtain, the synthesis method is simple, and the additive dosage is small.

The invention relates to methanol diesel oil which comprises methanol, diesel oil, fatty acid, petroleum acid, cosolvent, aviation kerosene, a cetane number improver and zinc peroxide. The invention further relates to a preparation method of the methanol diesel oil. According to the methanol diesel oil, the content of methanol in a system is greater, the methanol diesel oil has better mutual solubility with fossil diesel oil, the performance of the methanol diesel oil is improved obviously, and the methanol diesel oil can serve as -20# diesel oil for use, and is safe, environment-friendly and low in raw materials cost. The preparation method is simple in step, mild in condition and suitable for large-scale industrial production.

The present invention relates to a fuselage (1) of an aircraft or spacecraft, with at least one shell element (2) and a structural element (7). An interspace (5; 9) to which air can be admitted by an air stream (10) is provided between the at least one shell element (2) and the structural element (7). The fuselage is distinguished by the fact that, to form the air-admitting air stream (10) as an outgoing/incoming air stream of a pressurized interior space (20) of the fuselage (1), the interspace (5; 9) is connected to a corresponding outgoing/ incoming air connection of the interior space (20). The invention also relates to a corresponding aircraft or spacecraft and to a method of actively insulating such a fuselage (1).

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 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 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 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 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 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 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.

The invention provides an application method of a benzene ring-containing binary copolymer. The preparation method of the benzene ring-containing binary copolymer comprises: dissolving a benzyl methacrylate-maleic anhydride binary copolymer in a toluene solvent, adding higher fatty amine or aromatic amine and a p-toluenesulfonic acid catalyst, carrying out an amination reaction, and purifying to obtain a benzyl methacrylate-maleic anhydride binary copolymer. The product has strong solubility, and also can effectively improve the low temperature fluidity of diesel oil. By adding a diesel oil pour point depressant of the obtained benzene ring-containing binary copolymer into Songjiang No. 0 diesel oil, condensation point and cold filter plugging point of the diesel oil can be lowered by 6-19 DEG C and 0-7 DEG C respectively.

The invention relates to a compound diesel oil pour point depressant. The compound diesel oil pour point depressant is prepared from the following components in percentage by mass: 40-60% of polytetradecyl methacrylate-maleic anhydride, 10-20% of methyl acetate, 10-30% of ethyl acetate, 5-20% of triethylamine, and 10-20% of dicyclohexylamine. A preparation method comprises the steps that 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 an ultrasonic generator, and thus the compound diesel oil pour point depressant is obtained. Compared with the prior art, the diesel oil pour point depressant composition is wide in application range and can be suitablefor 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 the diesel oil can be decreased by 15-20 DEG C, and the cold filter plugging point of the diesel oil can be decreased by 4-9 DEG C.

The invention relates to a binary polymer biodiesel pour point depressant and a preparation method and application thereof.The preparation method comprises the steps that firstly, a mixed solution of methacrylic acid and higher alcohol is prepared, heated to 50-70 DEG C and evenly mixed, then a catalyst is added, heated to 110-120 DEG C and subjected to a constant-temperature reaction for 5-6 h, and a methacrylic acid high-carbon ester is obtained; and the methacrylic acid high-carbon ester and a methacrylic acid cyclic ester are prepared into a mixed solution, and polymerization reaction is carried out under the action of an initiator to obtain the binary polymer biodiesel pour point depressant. Compared with the prior art, the preparation method has the advantages that the preparation process is simple, the operation is convenient, the pour point depressing effect is effectively improved by introducing cyclohexyl methacrylate as a pour point depressant modification functional component, and the condensation point and the cold filter plugging point of the biodiesel are respectively reduced by 2-8 DEG C and 1-8 DEG C, so that the applicable temperature range of the biodiesel is expanded.

The invention relates to a benzene ring-containing biodiesel pour point depressant composition as well as preparation and an application of the biodiesel pour point depressant composition. The pour point depressant composition is prepared from the following components in percentage by weight: 20 to 60 percent of polytetradecyl methacrylate-styrene methacrylate, 10 to 20 percent of span 80, 10 to 20 percent of ethanolamine and 20 to 40 percent of fatty alcohol-polyoxyethylene ether. Compared with the prior art, the biodiesel pour point depressant composition has the advantages that growth and aggregation of crystals can be effectively inhibited by changing the crystallization behavior of biodiesel, and the low-temperature performance of the biodiesel is effectively improved.

The invention relates to a polar nitrogen-containing diesel oil pour point depressant composition as well as preparation and application thereof. The diesel oil pour point depressant composition is prepared from the following components in percentage by weight: 10-40% of triethanolamine; 10 to 40 percent of span 80; 0 to 20 percent of fatty alcohol-polyoxyethylene ether; and 40 to 60% of N,N-phenyl methacrylamide-tetradecyl methacrylate. Compared with the prior art, the dispersity of the pour point depressant in 0 # diesel oil sold in the market can be improved, the condensation point of the pour point depressant can be reduced by 22-26 DEG C, and the cold filter plugging point of the pour point depressant can be reduced by 8-12 DEG C.

The invention discloses a nano composite ternary polymer pour point reducer and a preparation method thereof. Modified nano montmorillonite and a ternary polymer according to a mass ratio of 1:1 to 1:8 are taken as raw materials, and the nano composite ternary polymer pour point reducer is prepared through a solvent blending method. The nano composite ternary polymer pour point reducer is prepared by the steps: taking fumaric acid high-carbon mixed alcohol ester, styrene and methyl methacrylate as monomers, and carrying out a polymerization reaction under the action of an initiator, thereby obtaining the pour point reducer, wherein the fumaric acid high-carbon mixed alcohol ester is an ester formed by fumaric acid and several alcohols selected from C14-C25 alcohols. The preparation method is simple, the raw materials are cheap and readily available, and the nano composite ternary polymer pour point reducer with high dispersity and excellent effects is provided. When the nano composite ternary polymer pour point reducer is applied to 0# diesel oil, the pour point depression effect is superior to that of a ternary polymer pour point reducer, so that the cold filter plugging point and condensation point of gasoline are respectively reduced by 14-22 DEG C and 18-37 DEG C.

The invention relates to a biodiesel pour point depressant composition as well as preparation and application thereof. The pour point depressant composition is prepared from the following components in percentage by weight: 40 to 60% of polytetradecyl methacrylate-acrylamide, 10 to 30% of Tween 60, 10 to 20% of dibutyl phthalate and 10 to 30 percent of polypropylene glycol. The growth and aggregation of crystals can be effectively inhibited by changing the crystallization behavior of biodiesel by the biodiesel pour point depressant composition, and the low-temperature performance of the biodiesel is effectively improved.

The invention relates to a composite nanometer diesel oil pour point depressant and a preparation method and application thereof.The preparation method comprises the following steps that 1, a silane coupling agent with aminopropyl and nanometer silicon dioxide are added into a solvent A, heating and stirring are conducted, and a nanometer material is obtained after aftertreatment; and 2) adding the nano material and polyethylene-vinyl acetate into a solvent B, carrying out melt blending, and separating to obtain the composite nano diesel oil pour point depressant. Compared with the prior art, the nano silicon dioxide material treated by the silane coupling agent has organic compatibility, and is compounded with the oil-soluble polymer to prepare the composite nano diesel oil pour point depressant, so that the pour point depression effect is effectively enhanced, the low-temperature flowing property of diesel oil is improved, and the application prospect of a nano material in the field of diesel oil pour point depressants is expanded.