178 results about "Viscosity index" patented technology

The invention discloses a preparation method of high-temperature transformer oil, and belongs to the technical field of high-temperature transformer oil. Comprising the following steps: 1, carrying out hydrolysis reaction to obtain ricinoleic acid; step 2, carrying out first esterification reaction to obtain a ricinoleic acid esterification product; 3, performing epoxidation reaction to obtain an epoxidized ricinoleic acid esterification product; 4, carrying out ring-opening reaction to obtain ring-opened castor oil; 5, carrying out a second esterification reaction to obtain modified castor oil base oil; and 6, mixing the modified castor oil base oil, a viscosity index improver, an antioxidant, a demulsifying agent and an extreme pressure agent to obtain the high-temperature transformer oil. The invention provides modified castor oil and a preparation method thereof. The high-temperature antioxidant transformer oil prepared by using the modified castor oil as base oil has the characteristics of environmental protection, degradability, high flash point, high breakdown voltage and the like, and also has excellent oxidation stability.

The application discloses a method and device for producing bright stock, and the obtained bright stock, which comprises the following steps: (1) contacting heavy oil with a hydrogenation catalyst under the presence of hydrogen, and performing hydrogenation reaction under hydrogenation treatment conditions to obtain a hydrogenation product; (2) performing alkylation reaction of aromatics in the hydrogenation product and C10-C20 olefins in olefin oil under the presence of a strong acid catalyst and under alkylation reaction conditions to obtain an alkylation product; and (3) performing distillation separation on the alkylation product to separate and obtain a heavy fraction with a temperature greater than 500 DEG C as the bright stock product. The method provided by the application expands the raw material source of the bright stock, simplifies the process flow, and is convenient for industrial production; and the prepared bright stock product not only has high viscosity and viscosity index, but also has good low-temperature flow performance and high oxidation stability.

The present invention provides a method for lubricating a combustion engine that is suitable for improving at least one of the following: deposits, sludge, oxidation, and wear. [Solution] A method for lubricating a combustion engine comprises lubricating the combustion engine with a lubricating oil composition, wherein the lubricating oil composition comprises a base oil having a lubricating viscosity having more than about 90 weight percent saturated material, less than about 0.03 weight percent sulfur, and more than about 50 weight percent hydrogenated mineral oil having a viscosity index of less than or equal to about 120; a detergent system having less than about 5 weight percent metal from a non-sulfonate detergent and (ii) a total base number (TBN) of a specific value, giving about 60 to about 85 percent of the total lubricating oil composition TBN; an anti-wear system comprising one or more zinc dihydrocarbyl dithiophosphate compounds; and an antioxidant system comprising one or more phenolic antioxidant compounds, one or more amine antioxidant compounds, or a combination thereof.

The invention provides a synthetic lubricating oil composition and application thereof, and belongs to the technical field of lubricating oil. The synthetic lubricating oil composition comprises base oil, a pour point depressant and a composite additive, the base oil comprises synthetic ester base oil; the synthetic ester base oil consists of low-viscosity synthetic ester and high-viscosity synthetic ester. The composition has ultrahigh viscosity index and low-temperature performance, is diesel engine lubricating oil with very excellent low-temperature performance, passes a graphite flake friction characteristic test and a THOT oxidation test required by TES 439 specifications, and can meet the lubrication requirements of an engine and a transmission system.

The invention discloses an aero-engine lubricating oil composition and a preparation method thereof, and relates to the field of lubricating oil. The composition comprises a composite base oil system, an antioxidant, an anti-wear reagent at extreme pressure, a corrosion inhibitor, an anti-foaming agent and an optional viscosity index improver, the composite base oil system is composed of high-purity pentaerythritol ester, poly-alpha-olefin and dipentaerythritol ester, wherein the high-purity pentaerythritol ester is synthesized by two-step esterification of pentaerythritol, binary fatty acid and monobasic fatty acid; according to the preparation method, a staged fine blending process is adopted, and vacuum dehydration and degassing, nitrogen protection and multi-stage filtration are combined. Through base oil structure innovation, additive purity control, function cooperation and process optimization, the high-temperature oxidation stability, extreme pressure wear resistance, corrosion resistance and rubber compatibility of the lubricating oil are remarkably improved.

The invention belongs to the field of special oil for aircraft hydraulic systems, and particularly relates to an aviation hydraulic oil composition as well as a preparation method and application thereof. The aviation hydraulic oil composition comprises the following raw materials in percentage by mass: 15%-20% of a viscosity index improver, 0.01%-1% of an antioxidant, 0.01%-1% of an anti-wear agent, 0.1%-2.0% of an anti-rust agent, 0.01%-0.1% of an anti-foaming agent, 0.01%-0.1% of a coloring agent and the balance of base oil. The aviation hydraulic oil composition disclosed by the invention has excellent low-temperature fluidity, high-temperature stability, anti-rust property and rubber compatibility, particularly has extremely good high-low temperature viscosity stability, and can ensure that an aircraft landing gear and a hydraulic system smoothly operate in an environment with relatively large high-low temperature change amplitude.

The application belongs to the technical field of shock absorber oil, and particularly relates to a silicon-based shock absorber oil for racing cars and a preparation method thereof. The silicon-based shock absorber oil for racing cars comprises, by mass percentage, 50-60 parts of silicone oil, 40-50 parts of base oil, 3-6 parts of a viscosity index improver, 0.2-0.5 parts of an extreme pressure anti-wear agent, 0.2-0.5 parts of a pour point depressant, and 0.2-0.5 parts of an antioxidant. The extreme pressure anti-wear agent comprises thiazolyl disulfide dimers and poly-methyl acrylate modified nanoscale spherical boron nitride. The silicon-based shock absorber oil for racing cars has excellent viscosity-temperature performance, shear stability, heat resistance, wear resistance, corrosion resistance and high-temperature foam resistance.

A low-viscosity lubricating oil composition with improved durability and NVH (noise, vibration, and harshness) performance is provided. The durability and NVH performance of the low-viscosity lubricating oil can be further enhanced by a suitable combination of mineral and / or synthetic oil and a viscosity index improver.

The invention relates to lubricating oil for an electric drive axle of a commercial vehicle and a preparation method thereof, and belongs to the technical field of lubricating oil. The lubricating oil for the electric drive bridge comprises the following components in parts by weight: 85-95 parts of base oil, 2-10 parts of a composite additive, 2-8 parts of a viscosity index improver and 0.1-0.5 part of an electric drive oil reinforcing agent, the base oil is a combination of coal-to-liquid and poly-alpha-olefin; the total amount of the components is 100 parts. The invention also provides a preparation method of the lubricating oil for driving the axle. By optimizing a lubricating formula, the problems of high rotating speed, high load, large torque and multi-working-condition operation of an electric drive axle are solved in a targeted manner, and compared with traditional GL-5 gear oil, transmission efficiency can be remarkably improved, the service life of parts can be prolonged, electrical safety can be guaranteed, and the lubricating oil is a key guarantee for reliable operation of an electric drive axle system.

The invention belongs to the technical field of lubricating oil, and particularly relates to a lubricating oil composition with a long oil change period as well as a preparation method and application thereof. The lubricating oil composition disclosed by the invention is prepared from the following components based on the total weight of the lubricating oil composition: 0.8 to 1.8 percent of a metal detergent, 1.5 to 2.5 percent of an ashless dispersant, 0.5 to 1.3 percent of an antioxidant and antiwear agent, 0.1 to 0.8 percent of an auxiliary antioxidant, 5 to 10 percent of a viscosity index improver, 0.2 to 0.5 percent of a pour point depressant, 0.001 to 0.01 percent of an anti-foaming agent and the balance of base oil. The lubricating oil composition disclosed by the invention passes a program IIIE engine bench test in the SJ standard requirement, the performance meets the SJ index requirement, the test time is prolonged by 40% compared with the standard time, and the lubricating oil composition has excellent volatile resistance and less engine oil consumption and meets the requirement of a gasoline engine generator for a long oil change period of 150h in the actual use process.

This invention discloses a method for producing base oil. The raw material is mixed with hydrogen and then fed into a graded hydroisomerization dewaxing reactor. The mixture sequentially passes through a protective agent layer and a catalyst layer for hydroisomerization. The resulting catalytic product undergoes boiling point trimming to obtain base oil with a fraction exceeding 340°C. Along the flow path, the total acid content of the catalyst first increases and then decreases, and the molar percentage of acid in the total acid content also first increases and then decreases. The reaction temperature of the protective agent layer is lower than that of the catalyst layer, and the reaction temperature within the catalyst layer first increases and then remains constant or decreases. This invention, by using a specifically graded hydroisomerization dewaxing reactor and setting different temperature zones, produces base oil with higher yields, lower sulfur and nitrogen content, and effectively reduces the low-temperature performance (pour point and cloud point) of the base oil, resulting in a higher viscosity index and improved base oil quality.

The invention belongs to the technical field of lubricating oil, and particularly relates to an energy-saving engine oil composition and application thereof. The engine oil composition is prepared from the following raw material components: base oil, a clearing agent, an ashless dispersant, a phenolic ester type amine antioxidant, an anti-wear agent, a viscosity index improver, a pour point depressant, an ionic liquid additive and an anti-foaming agent, wherein the ionic liquid additive is a quaternary ammonium salt-containing ester anti-wear agent, and the chemical structural formula of the ionic liquid additive is as follows: the composition is prepared by selecting an engine oil complexing agent, a viscosity index improver styrene copolymer, a pour point depressant and ionic liquid from the base oil which is III type base oil, PAO type base oil or a mixture of the III type base oil and the PAO type base oil. The catalyst has the characteristics of low phosphorus, low sulfur and low ash content. The normal lubrication working condition of the engine oil is met, the abrasion resistance of the engine oil is improved, and a good energy-saving effect is achieved.

The invention belongs to the field of lubricating oil, and particularly relates to a multi-gear gearbox lubricating oil composition as well as a preparation method and application thereof. The multi-gear gearbox lubricating oil composition is prepared from the following raw materials in percentage by mass: 2.0 percent to 4.5 percent of a viscosity index improver, 0.01 percent to 0.08 percent of a clearing agent, 4.5 percent to 7.0 percent of a dispersing agent, 0.3 percent to 1.0 percent of an anti-wear reagent at extreme pressure, 0.05 percent to 0.3 percent of an anti-rust agent, 0.3 percent to 1.5 percent of an antioxidant, 0.01 percent to 0.2 percent of a metal deactivator, 0.3 percent to 1.5 percent of a cross-linking agent, 0.01 percent to 0.03 percent of an anti-foaming agent and the balance of base oil. The cross-linking agent of the composition adopts trimethylolpropane tri (1H-imidazole-1-acetate), so that the wear resistance of an oil product is effectively enhanced, the friction coefficient is reduced, and the friction durability is improved, thereby achieving the effects of prolonging the endurance mileage and prolonging the service life of hardware.

A viscosity index improver (VII) or viscosity modifier (VM) concentrate comprising: from about 60 parts to about 95 parts of a diluent oil; and from about 5 parts to about 40 parts of star diblock and triblock copolymers having a coupling efficiency greater than about 50%; the concentrate comprises at least 50 wt% of the diluent oil and from about 6.0 wt.% to about 14.0 wt.% of the star and linear diblock and triblock copolymers. The diblock and triblock copolymers possess the ability to thicken in concentrates without gelation or slow flowing material, relatively uniformly across different types or Groups of base stocks / diluents, at high active ingredient concentrations and handling temperatures.

This invention relates to the field of lubricating oil technology, and more particularly to an engine oil composition with improved water resistance and its preparation method. The engine oil composition includes a complexing agent, a base oil, a viscosity index improver, and a pour point depressant. The complexing agent is a mixture of detergent, dispersant, zinc dialkyl dithiophosphate, antioxidant, friction improver, emulsifier retainer, and corrosion inhibitor. The emulsifier retainer is a polymethacrylate with an N-vinylpyrrolidone branched structure and / or a styrene-maleic anhydride polymer. The engine oil composition of this invention, by employing a specific complexing agent and mixing it with other functional additives, exhibits excellent formulation balance and compatibility, and can well meet the requirements of automobile manufacturers for the water resistance, fuel economy, and emission performance of hybrid engine oils.

The present application relates to the technical field of petroleum chemical catalyst, in particular to a hydrogenation shape selective cracking catalyst and its application method.The hydrogenation shape selective cracking catalyst comprises a carrier and an active metal component, the carrier comprises SAPO-11 molecular sieve, ZSM-23 molecular sieve and low-sodium small-pore pseudo-boehmite powder, and the active metal component comprises palladium, nickel, lanthanum and cerium;the content of SAPO-11 molecular sieve is 40-50 wt%, the content of ZSM-23 molecular sieve is 7-8.5 wt%, the content of palladium is 0.2-1.5 wt%, the content of nickel is 0.5-5.5 wt%, the content of cerium is 0.6-4%, the content of lanthanum is 2-7%, and the rest is low-sodium small-pore pseudo-boehmite powder, based on the total weight of the catalyst.The present application can produce transformer oil with a pour point less than-50 DEG C and high-quality bright oil products with a viscosity index greater than 110 and being transparent and free of flocculation at 15 DEG C.

The application discloses a hydroisomerization catalyst and a method for processing Fischer-Tropsch synthesis soft wax into lubricating base oil. The hydroisomerization catalyst is a combined catalyst, comprising catalyst A and catalyst B; wherein the catalyst A is a platinum and / or palladium loaded molecular sieve with a TON structure, and the catalyst B is a platinum and / or palladium loaded molecular sieve with a *MRE structure. The catalyst is used for processing Fischer-Tropsch synthesis soft wax into lubricating base oil. After vacuum distillation of a Fischer-Tropsch synthesis soft wax raw material, a fraction with a distillation temperature greater than 550 DEG C is removed by evaporation, and a fraction with a distillation temperature less than or equal to 550 DEG C is introduced into a hydroisomerization reaction zone. Hydroisomerization and moderate cracking of the soft wax are completed on the hydroisomerization catalyst based on the combined TON structure and *MRE structure molecular sieve shape channel and specific catalytic performance, and a hydroisomerization cracking oil is obtained. The obtained hydroisomerization cracking oil can be processed into low pour point and high viscosity index lubricating base oil by a supplemental refining-fractionation process with a high yield.

The present invention discloses aryl-polyalkylene glycol monoester compound compositions that are suitable for use as a base oil, particularly a base oil for use as an automotive lubricant. The compositions can generally be characterized by having low kinematic viscosity at 100° C. high viscosity index and low Noack volatility. The present invention also discloses lubricant formulations including such aryl-polyalkylene glycol monoester compounds with other materials such as an API Group I-V base oil and / or additives.

The object of the present invention is to provide a viscosity index improver that, in a lubricating oil composition using ester oil, exhibits excellent viscosity-enhancing effect at 100°C, can lower the kinematic viscosity at 40°C, and has a high viscosity index-enhancing effect while considering the environment, such as biodegradability and environmental toxicity. [Solution] A viscosity index improver containing a poly(meth)acrylate polymer (A), an ester oil (B), and an ester oil (C), wherein the solubility parameter (SP value) of the poly(meth)acrylate polymer (A) is 8.95 to 9.15 (cal / cm³). 3 ) 1 / 2 The ester oil (B) is a diesterified product, and the solubility parameter (SP value) of the ester oil (B) is 8.80-8.95 (cal / cm³). 3 ) 1 / 2 The ester oil (C) is a glycerol triester, and the solubility parameter of the ester oil (C) is 8.90-9.00 (cal / cm³). 3 ) 1 / 2 A viscosity index improver.

The application discloses a hydrocracking catalyst and a preparation method and application thereof. The catalyst comprises a hydrogenation active metal component and a carrier, and the carrier comprises a modified ZSM-22 molecular sieve and a Y molecular sieve. The Y molecular sieve has the following properties: a relative crystallinity of 110% to 150%, a molar ratio of SiO2 / Al2O3 of 10 to 100, preferably 15 to 70, a cell parameter of 2.425 to 2.445 nm, a total pore volume of 0.55 to 1.0 mL / g, preferably 0.6 to 1.0 mL / g, and a mesopore volume accounting for more than 70% of the total pore volume, preferably 80% to 90%. The preparation method of the hydrocracking catalyst comprises preparation of the carrier and loading of the hydrogenation active metal component. The hydrocracking catalyst can be used for production of a lubricating oil base oil raw material, and the obtained lubricating oil base oil raw material has the advantages of high viscosity index, low n-alkane content and good low-temperature flow performance.

The invention relates to the technical field of injection molding, in particular to a bio-based plastic injection molding method and system applied to an in-ear headphone, and the method comprises the following steps: acquiring a polylactic acid material set and a polyhydroxy ester material set, acquiring a test sample by using an initial material set, and performing property test on the test sample to obtain a mixed material melting point, a material viscosity index and a material shrinkage rate; and calculating a target injection molding temperature, a target injection molding pressure and a target dwell pressure based on a preset initial gas ripple degree, a preset initial color difference degree, a mixed material melting point, a material viscosity index and a material shrinkage rate, and carrying out injection molding on the dry material by using a target injection molding machine and an earphone mold to obtain the bio-based plastic. And the high-definition camera is used for conducting surface detection on the bio-based plastic, the material gas stripe degree and the material color difference degree are obtained, the target plastic is collected, a target plastic set is obtained, and bio-based plastic injection molding is completed. The automation degree of the injection molding process can be improved, and the product quality is improved.

The present invention provides lubricant base oil and a preparation method therefor. The preparation method comprises: subjecting Fischer-Tropsch wax having a distillation range of 400-550°C to a hydroisomerization reaction under the action of a hydroisomerization catalyst, and then to a hydrofining reaction under the action of a hydrofining catalyst and rectification to obtain lubricant base oil, wherein the preparation of the hydroisomerization catalyst comprises the steps of: ZSM-48 seed crystal synthesis, ZSM-48 molecular sieve preparation, carrier forming, noble metal ion loading, calcining, etc. The hydroisomerization catalyst exhibits relatively high isomerization selectivity for Fischer-Tropsch wax having a distillation range of 400-550°C. Under the action of the hydroisomerization catalyst, the Fischer-Tropsch wax can be used to prepare lubricant base oil having a high viscosity index, a low pour point, and a low cloud point. The method for preparing the lubricant base oil not only has the advantages of high yield and a simple preparation process flow, but also can simultaneously produce 4cSt base oil and 6cSt base oil of relatively high quality.

The present application relates to the technical field of lubricating oil, and particularly relates to a special lubricating oil composition for gear box of port machinery equipment and a preparation method thereof.The preparation method of the present application comprises the following steps: preparing a graphene oxide lubricating additive by using graphene oxide and part of base oil; stirring uniformly extreme pressure anti-wear agent, rust inhibitor, antioxidant, demulsifier, pour point depressant, viscosity index modifier and the remaining part of base oil, then adding the graphene oxide lubricating additive and anti-foaming agent, continuing to stir and mixing uniformly to obtain the special lubricating oil composition for gear box of port machinery equipment.The lubricating oil composition prepared by the preparation method of the present application has excellent load-carrying and anti-wear performance, unique anti-micro-pitting performance, excellent oxidation resistance, low-temperature fluidity and water separation performance and the like, and is suitable for gear box lubrication working under harsh working conditions such as heavy load, impact load and low-temperature environment.

The present application relates to the technical field of hydraulic transmission oil, and particularly relates to a hydraulic transmission oil composition with high shear stability and a preparation method thereof. The hydraulic transmission oil composition comprises the following components in parts by weight: base oil 85-99 parts, composite additive 0.1-5 parts, viscosity index improver 1-10 parts, pour point depressant 0.1-2 parts, and anti-foaming agent 0.001-0.1 part. The base oil is at least one of type I, type II and type III base oil. The viscosity grade of the base oil is No. 4, No. 6 or No. 8. The hydraulic transmission oil composition has high shear stability, good low-temperature performance, good copper strip corrosion resistance and good rust prevention, and can be used in vehicle hydraulic couplings and hydraulic torque converters, and can also be used in the hydraulic transmission system of engineering machinery.

The application provides a new HSD type sticky-finger agent, a preparation method and application. The new lubricating oil viscosity index improver has the following structure: (A x B 4x )C 4xn , A is a double primary amine compound, and only contains C, H and N elements; B is an acrylic ester or a methacrylic ester. A x B 4x are connected through a saturated bond; C is a polymer of styrene, isoprene or butadiene; x is the number of A molecules, and n is the number of primary and secondary amines of A x B 4x , and is an integer of 1-20, but is not limited to the integer. The lubricating oil viscosity index improver has good thickening performance, shear resistance and low-temperature performance. The lubricating oil viscosity index is widely used in gasoline engine oil, diesel engine oil, motorcycle oil and gas engine oil.

The invention discloses a polyethylene-propylene-3-methyl-1-butene polymer as well as a preparation method and application thereof, and belongs to the technical field of synthetic rubber. The polyethylene-propylene-3-methyl-1-butene polymer has the following molecular structure, wherein n and m are both polymerization degrees; y is branched nodes, and the number of the branched nodes is 5-6; n / (m + n) is equal to 0.38-0.42, the hydrogenation degree is 99.5-99.8%, and the viscosity index modifier is easy to dissolve in mineral oil, high in thickening capacity, low in shear shift index (SSI) and excellent in viscosity-temperature characteristic, has a good modification effect on lubricating oil and is particularly suitable for being used as a base oil viscosity index modifier.

The invention provides wide-temperature-range alkyl naphthalene base oil as well as a synthesis method and application thereof, and the synthesis method of the wide-temperature-range alkyl naphthalene base oil comprises the following steps: mixing naphthalene and alpha-olefin, and performing Friedel-Crafts alkylation reaction under the action of a catalyst of a modified Y-type molecular sieve to obtain long-chain alkyl naphthalene. According to the present invention, the viscosity index of the prepared alkyl naphthalene is similar to the viscosity index of the commercial alkyl naphthalene of the same type, the temperature interval of the open flash point and the pour point is wide, the method has characteristics of strong adaptability and strong practicality, the use range of the alkyl naphthalene as the base oil raw material is efficiently improved, and the quality of the total synthesis lubricating oil finished product oil is improved.

This invention discloses a high-precision prediction method for high-speed turbulent boundary layer friction based on compressible transformation, belonging to the field of fluid mechanics engineering calculation and experimental technology. Specifically, the method involves: 1) Obtaining the basic parameters of the zero-pressure gradient compressible flat plate turbulent boundary layer to be predicted, including the incoming Mach number, momentum-thickness Reynolds number, Prandtl number, incoming reference temperature, wall temperature, recovery temperature, and viscosity index; 2) Setting the initial iteration values, convergence criteria, and maximum iteration steps for numerical calculation; 3) Pre-calculating the values ​​of the auxiliary function in the improved drag transformation model over the specified interval, as well as the ratio of free-flow velocities before and after the transformation; 4) After the pre-calculation, using an iterative method to solve for the target parameters in the improved drag transformation model; 5) Calculating the wall friction coefficient and heat flux coefficient based on the obtained target parameters and basic parameters. This method can achieve rapid and high-precision prediction of the wall friction coefficient and heat flux coefficient under a wide range of Mach numbers and complex wall heat transfer conditions, demonstrating significant engineering practicality.

The present invention provides a low viscosity lubricating oil composition having improved durability and NVH (noise, vibration, and vibration roughness) performance. The durability and NVH performance of the low-viscosity lubricating oil can be improved by appropriately combining the mineral oil and / or the synthetic oil with the viscosity index improver.

The invention provides an ionic liquid-containing lubricating oil composition for a piston type aero-engine, and relates to the technical field of lubricating oil. The composition is prepared from the following components in percentage by weight: 1 to 2 percent of ionic liquid, 0.5 to 2.0 percent of an antioxidant mixture, 0.5 to 1.0 percent of tricresyl phosphate, 0.01 to 0.2 percent of a benzotriazole metal deactivator, 6.0 to 9.0 percent of an ethylene-propylene copolymer viscosity index improver, 3.0 to 6.0 percent of a succinimide ashless dispersant, 10 to 100 ppm of an anti-foaming agent and the balance of base oil, wherein the antioxidant mixture is prepared from the following components in percentage by weight: 0.4 to 1.0 percent of p-diisooctyl diphenylamine and 0.4 to 1.0 percent of lipid antioxidant. According to the piston type aviation lubricating oil composition containing the ionic liquid, the wear resistance, the thermal stability, the low-temperature fluidity and the oxidation resistance of lubricating oil are improved.