1270 results about "Base oil" patented technology

The invention relates to the technical field of oil sludge resource regeneration, and discloses a water oil sludge resource regeneration device based on a composite ultrasonic field and application. The device comprises an oil sludge parameter acquisition module, a resonant frequency analysis module, a sound field coupling control module, a phase shift interference analysis module and a separation strengthening execution module. The oil sludge parameter acquisition module acquires a rheological characteristic data set of the oil-containing sludge in real time; the resonance frequency analysis module generates a dual-target resonance frequency parameter based on the data set; the sound field coupling control module drives the piezoelectric transducer array to generate a focused ultrasonic field, and a sound field coupling model is constructed; the phase shift interference analysis module corrects the phase offset of the model and outputs a multi-band sound energy injection sequence; and the separation strengthening execution module regulates and controls the rotating speed gradient of the mechanical centrifugal unit, triggers membrane stack pulse backwashing, and finally generates regenerated base oil and a purified water phase product. According to the device, efficient regeneration of water-oil sludge resources is realized through cooperation of multiple modules.

An integrated process having an ultra-low GHG footprint for converting Camelina based biomass to liquid fuels and lubricant base stocks in which a Camelina based biomass feed is converted to liquids by a multistep hydroprocessing method and the liquids are upgraded to produce premium hydrocarbon fuels and lubricants.

The invention belongs to the technical field of asphalt pavement materials, and particularly relates to a high-permeability asphalt regenerant as well as a preparation method and application thereof, and the high-permeability asphalt regenerant is prepared from the following components in parts by weight: 100 parts of base oil, 20-50 parts of oil slurry, 5-20 parts of plasticizer and 5-15 parts of anti-aging agent. The high-permeability asphalt regenerant provided by the invention can effectively optimize the composition of old asphalt components, improve the interface fusion efficiency of new asphalt and old asphalt, and enable asphaltene to be better dispersed in aromatic components and saturated components by virtue of colloid to form a stable colloid structure; the indexes such as high and low temperature performance and water stability of the recycled asphalt mixture are improved, the temperature sensitivity of asphalt is reduced, the influence of external environment temperature on asphalt properties is reduced, and the recycled asphalt has excellent low temperature performance; the pavement performance of the RAP material is recovered, so that the performance of the aged asphalt is basically recovered to a non-aged level, and the service life of the asphalt material is prolonged.

The invention relates to the technical field of energy storage safety, and particularly discloses flame-retardant cooling liquid, a preparation method of the flame-retardant cooling liquid, an immersed energy storage device, a data center and electric equipment. According to the present invention, the base oil is at least one of the liquid halogenated alkane containing 2-6 carbon atoms, the liquid halogenated olefin, the liquid halogenated ketone and the liquid halogenated cycloalkane containing 3-6 carbon atoms, such that the high biodegradability of the base oil is maintained, the system viscosity is effectively reduced, the heat dissipation performance is improved, the insulating property of the base oil is significantly improved, and the service life of the base oil is prolonged. Meanwhile, the flame retardance is further enhanced. Therefore, the heat management efficiency of the cooling liquid is remarkably improved while environmental protection and safety are considered, and the cooling liquid has a good application prospect.

The invention discloses conductive lubricating grease and a preparation method thereof, and belongs to the technical field of lubricating grease materials, the conductive lubricating grease comprises the following components by mass: 50-80 parts of base oil, 5-15 parts of a thickening agent, 3-10 parts of an additive, 5-20 parts of an oil soluble ionic liquid, and 1-10 parts of nanoscale conductive solid particles; the oil-soluble ionic liquid is prepared from trioctylamine, bromohexadecane and sodium di-tert-butyl phosphate. According to the conductive lubricating grease provided by the invention, the oil-soluble ionic liquid and the nanoscale conductive solid particles synergistically conduct electricity, so that the conductive lubricating grease has a tunnel conductive effect and excellent conductivity; besides, due to synergistic conduction of the oil-soluble ionic liquid and the nanoscale conductive solid particles, the addition amount of the conductive solid particles can be reduced, the anti-attrition effect of the conductive lubricating grease is further improved, meanwhile, the nanoscale conductive solid particles have a good anti-attrition effect, the solid size and the oil film thickness are both in nanoscale sizes, and the conductive lubricating grease has a good anti-attrition effect. Therefore, the conductive lubricating grease is excellent in overall anti-wear effect.

The invention belongs to the technical field of quenching oil, and discloses low-carbon steel quenching oil as well as a preparation method and application thereof, and the low-carbon steel quenching oil comprises the following components in percentage by mass: 88%-94% of base oil, 3%-7% of a cooling accelerant, 1.5%-2% of a dispersing agent, 0.5%-1.5% of a brightener and 1%-3% of a composite antioxidant, wherein the base oil comprises first base oil and second base oil in a mass ratio of 1: (1.8-2.2), the kinematic viscosity of the first base oil at 40 DEG C is 23 mm < 2 > / s-27 mm < 2 > / s, the kinematic viscosity of the second base oil at 40 DEG C is 86 mm < 2 > / s-90 mm < 2 > / s, and the flash points of the first base oil and the second base oil are both higher than 210 DEG C. According to the quenching oil, the industrial pain points that the cooling speed of traditional quenching oil is difficult to control, a workpiece is prone to deformation and cracking, and the performance is difficult to consider are precisely overcome, perfect balance of ultrahigh strength and excellent toughness is achieved on the basis that it is guaranteed that a material forms an ideal microstructure, and more reliable safety performance support is provided for an automobile anti-collision beam.

The invention belongs to the field of oil and gas exploitation, geothermal exploitation and deep ground engineering, and discloses an oil and gas shaft crack plugging pressure repair material and method based on microwave heating bismuth-based alloy, the material comprises 74%-86% of bismuth-based alloy powder, 10%-15% of Fe3O4-SiO2 core-shell magnetic particles, 3%-8% of a microwave sensitizer and 1%-3% of a wetting agent. The repairing material is conveyed to the position, where shaft crack plugging repairing needs to be conducted, in the oil and gas shaft, then the repairing material is melted in a microwave heating mode, then the melted alloy is filled in shaft crack plugging, and then a rotating gradient magnetic field is used for repairing the oil and gas shaft crack. And the liquid alloy is driven to directionally migrate to a target crack area along the magnetic line, and after alloy liquid is cooled and solidified, pressure repairing of the oil and gas shaft crack plugging target position is achieved. Precise positioning, efficient filling, phase change control and complete recovery of the repairing material can be achieved in the extremely deep environment, and therefore the high-quality repairing requirement for oil and gas shaft crack plugging pressure repairing achieved through efficient liquefaction of plugging metal can be met.

The invention discloses a lubricating grease composition I and a lubricating grease composition II, wherein the lubricating grease composition I is used as a raw material of the lubricating grease composition II. The lubricating grease composition I comprises 60-90 parts of base oil, 5-20 parts of a fatty acid composition, 2-5 parts of lithium hydroxide, 2-6 parts of modified nano boron nitride and 5-15 parts of an additive; wherein the viscosity of the base oil at 40 DEG C is 30-60 mm < 2 > / s, and the base oil is prepared by compounding and mixing 60%-90% w / w of poly-alpha-olefin synthetic oil (PAO) and the balance of synthetic ester (POE) belonging to V-type synthetic oil; the fatty acid composition is prepared from 12-hydroxystearic acid and unsubstituted C14-C20 saturated long-chain fatty acid, wherein the mass of the 12-hydroxystearic acid is 1 to 10 times that of the unsubstituted C14-C20 saturated long-chain fatty acid; the modified nano boron nitride is oleamide modified nano boron nitride; the additive is selected from at least one of an antioxidant, an anti-rust agent and an extrusion anti-wear agent. The invention also discloses application of the lubricating grease composition II as lubricating oil in lubrication of axle box bearings of high-speed railway trains with the speed of not less than 400km / h.

The invention relates to the technical field of power cables, in particular to antirust cable accessory insulation lubricating grease and a preparation method thereof.The antirust cable accessory insulation lubricating grease is prepared from, by weight, 100 parts of base oil, 8-25 parts of modified fumed silica, 0.01-3 parts of extreme pressure anti-wear agent and 0.1-1 part of antioxidant. According to the invention, a benzotriazole corrosion inhibition group and a diphenyl silane insulation barrier are synchronously constructed on the surface of fumed silica, so that integration of dual functions is realized. A triazole ring of benzotriazole is directionally exposed on the surface of the filler, a compact passivation film is formed through coordination of lone pair electrons and metal atoms, and an electrochemical corrosion path is blocked from the molecular level; and a rigid aromatic ring of diphenyl silane inhibits electron migration through a steric hindrance effect to form a high-energy barrier insulating layer. The two are stably combined through siloxane covalent bonds, so that the performance conflict caused by phase separation of an antirust agent and an insulating agent in a traditional physical mixing process is solved, and the lubricating grease is endowed with long-acting synergistic protection capability.

The invention provides a formula of sleep-aiding essential oil containing cedar himalaya, relates to the technical field of sleep-aiding essential oil, and aims to solve the problems of single effect, poor stability and insufficient skin tolerance of existing sleep-aiding essential oil. The formula comprises the following components in parts by weight: 0.5-5 parts of Himalaya cedar essential oil, 80-95 parts of base oil, 1-10 parts of synergistic sleep-aiding essential oil, at least one of lavender essential oil, chamomile essential oil and sandalwood essential oil, and 0.1-1 part of optional antioxidant. During preparation, the components are ensured to be uniform through a process of stirring at a constant temperature of 25-35 DEG C and mixing at a rotating speed of 200-300rpm, the pH value of the product is 5.5-7.0, the retention rate of the active components is greater than or equal to 90% after the product is stored in a dark place at 25 DEG C for 6 months, and the use mode is that the product is smeared on wrists / necks / soles 1-2 hours before sleep, and 0.5-2mL of the product is smeared on each time. Tests show that the sleep time of insomnia people can be shortened to 15-22 min after the essential oil is continuously used for 28 days, the PSQI score is reduced by 40%-54%, the skin irritation is zero, the essential oil is suitable for preparing external sleep-aiding essential oil cream, ball bottles and other products, and a safe and efficient solution is provided for sleep disorder people.

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 invention provides polyether base oil and a preparation method and application thereof.According to the polyether base oil, a melt polycondensation method is adopted, a diester group-COO-R-COO-is introduced into a molecular structure through hydroxyl groups at the two ends of polyalkylene oxide, a polyether ester molecular chain with ether bonds and diester bonds distributed alternately is formed, and the polyether base oil is prepared. Then, carboxyl at the end group of a molecular chain is further subjected to an end-capping reaction with an amine compound, a unique amine double-end-capped polyether ester structure is obtained, and the polyether base oil has excellent viscosity-temperature performance, oxidation resistance, anti-rust performance and anti-wear and anti-friction performance.

The present invention relates to the technical field of waste lubricating oil treatment, and discloses a non-distillation regeneration apparatus and system, the non-distillation regeneration apparatus comprises: a high pollution lubricating oil pretreatment unit for removing water and other large particle impurities in waste oil; the electro-adsorption unit is used for capturing pollutants such as polar oxides and colloids in oil by adopting a porous conductive framework under the action of a direct-current electric field; the molecular filtering unit is used for carrying out cross-flow filtering by utilizing a ceramic membrane assembly and removing macromolecular non-ideal components; the deep purification unit is filled with a composite adsorbent to further purify the base oil, and the final product quality is ensured. By means of the innovative electro-adsorption refining filter and the multi-stage collaborative purification process, efficient regeneration of the waste lubricating oil under the non-distillation condition is achieved, high-quality base oil can be stably produced, and the method has the remarkable advantages of being energy-saving, environmentally friendly and high in automation degree.

The objective of the present invention is to provide technology for optically quantifying the physical properties of oil.　One aspect of the present invention provides a method for generating an estimation model for physical properties of oil using an information processing system comprising an input device, an output device, a processing device, and a storage device, wherein the information processing system is provided with an estimation model generating unit that generates a machine-trainable estimation model, and the estimation model generating unit accepts input of an absorption spectrum obtained by transmitting light including at least some wavelengths between 800 and 2500 nm through an oil that contains a base oil and an additive, and a value reflecting a physical property value of the oil, and generates the estimation model by machine learning using a value based on the absorption spectrum as an explanatory variable, and the value reflecting the physical property value of the oil as a dependent variable.

The application discloses a long-acting thixotropic rust-proof oil composition which is composed of the following components in mass fraction: base oil 70-95 parts, rust-proof agent 5-15 parts, auxiliary rust-proof agent 1-5 parts, antioxidant 0.1-1 part, thixotropic agent 1-20 parts and film forming agent 1-5 parts. The application also discloses a preparation method thereof, wherein after the components are weighed, the base oil is heated and stirred, and then added into the film forming agent to obtain mixture A; the mixture A is added into the thixotropic agent, the rust-proof agent, the auxiliary rust-proof agent and the antioxidant in sequence, and then constant-temperature stirring is conducted to obtain mixture B; after the mixture B is filtered, the filtrate is the composition of the application. The long-acting thixotropic rust-proof oil composition has a high thixotropic index, is not prone to flowing, and can keep a stable oil film thickness on the surface of a workpiece; under the conditions of damp heat and salt spray, the long-acting thixotropic rust-proof oil composition can exhibit more excellent rust-proof performance, and is suitable for harsh storage or transportation conditions such as sea transportation.

The invention discloses an oil tank liquid level real-time monitoring method and system based on an intelligent sensor, and the method comprises the following steps: S1, collecting and preprocessing oil tank liquid level data, and constructing a liquid level time sequence; s2, extracting a time sequence fragment in a sliding manner, analyzing a trend, calculating a change rate and an amplitude, and generating a trend feature vector; s3, constructing a prediction model for reasoning, performing transformation, gating and mapping on a result, and generating a trend prediction and abnormal probability sequence; s4, fusing the sequence to calculate a mean value and a standard deviation, and constructing a threshold value based on Z-score to identify an abnormal time step; s5, calculating an error between a predicted value and a reference value, and dynamically adjusting PID parameters to generate a control instruction; and S6, comparing predicted data with real-time data before control, and updating model parameters according to deviation. According to the method, intelligent sensor collection, BEMD decomposition, deep learning trend prediction and a PID control feedback mechanism are fused, and the prediction precision and the regulation response capability of oil tank liquid level monitoring are improved.

The present invention provides a grease composition and an axle bearing in which the grease composition is sealed.SOLUTION: The grease composition of the present invention contains a base oil, a thickener, and an additive, the additive contains an organic metal salt of a divalent metal and an inorganic metal salt of a divalent metal, the total mass of the metal content of the organic metal salt and the metal content of the inorganic metal salt is 1.00% by mass or more based on the grease composition, and the metal content of the organic metal salt with respect to the total mass of the metal content of the organic metal salt and the metal content of the inorganic metal salt is 0.20 or more on a mass basis.SELECTED DRAWING: None

This invention relates to a hydrogen-form ZSM-48 molecular sieve, its synthesis method, and its applications. The hydrogen-form ZSM-48 molecular sieve has an average mesopore size of 6 nm to 30 nm, a B / L acid ratio of 0.7 to 3.4, and a specific surface area of ​​100 m². 2 / g~500m 2 / g. The synthesis method of the hydrogen-form ZSM-48 molecular sieve includes the following steps: (1) Under contact conditions, silicon source, aluminum source, template agent and water are mixed evenly to obtain a gel; (2) The gel obtained in step (1) is subjected to hydrothermal crystallization treatment, and then washed, dried and calcined to obtain hydrogen-form ZSM-48 molecular sieve. The template agent in step (1) includes hexamethylammonium hydroxide and urea; preferably, the template agent also includes urease. The synthesis method controls the molecular sieve pore size and B / L acid ratio by introducing urease and using a two-stage hydrothermal treatment method, thereby realizing the control of molecular sieve properties according to the target reaction characteristics, which is beneficial to improving the yield of low-branched isoalkanes and improving the quality of lubricating oil base oil.

The application belongs to the technical field of lubricating oil, and specifically provides a gas engine lubricating oil and a preparation method thereof.The gas engine lubricating oil comprises the following raw materials: ester base oil, anti-wear agent, dispersant, pour point depressant and antifoaming agent, wherein the ester base oil is prepared by esterification reaction of polyhydric alcohol and fatty acid; the preparation method of the anti-wear agent comprises the following steps: first, reacting acrylic acid with vinyl imidazole to prepare a modifier; then, polymeric phenol is obtained by polymerization of phenol under the action of a catalyst; finally, the polymeric phenol, boric acid and vegetable oil are reacted, the modifier is added after a certain time of reaction, and the reaction is continued to obtain the anti-wear agent.The preparation method of the gas engine lubricating oil of the application is that the raw material components are uniformly mixed according to the formula, and the gas engine lubricating oil of the application has good wear resistance, oxidation resistance, high-temperature detergency and thermal 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 application relates to a battery foil and a preparation method thereof, a battery and a power utilization device. The preparation method of the battery foil comprises the following steps: rough rolling treatment, medium rolling treatment and fine rolling treatment of a battery foil blank by using rolling oil in sequence; the rolling oil comprises base oil and rolling additives, the oil film strength alpha of the rolling oil is greater than 280 N, and the friction coefficient mu of the oil film is less than 0.05; the temperature of the rough rolling treatment is T1, the temperature of the medium rolling treatment is T2, and the temperature of the fine rolling treatment is T3, T1 < T2 < T3; the processing rate of the rough rolling treatment is S1, the processing rate of the medium rolling treatment is S2, and the processing rate of the fine rolling treatment is S3, S1 > S2 > S3; the rolling speed of the rough rolling treatment is V1, the rolling speed of the medium rolling treatment is V2, and the rolling speed of the fine rolling treatment is V3, V1 > V2 > V3. The preparation method of the battery foil can effectively improve the adhesion of the battery foil.

Provided is a continuous process for converting waste plastic into recycle for polypropylene polymerization. The process comprises selecting waste plastics containing polyethylene and / or polypropylene and preparing a stable blend of petroleum and the selected plastic. The amount of plastic in the blend comprises no more than 20 wt. % of the blend. The blend is passed to a refinery hydrocracking unit. A liquid petroleum gas C3 olefin / paraffin mixture is recovered from the hydrocracking unit. The C3 paraffins and C3 olefins are separated into different fractions with the C3 olefin fraction passed to a propylene polymerization reactor, and the C3 paraffin fraction passed optionally to a dehydrogenation unit to produce additional propylene. A heavy fraction can also be recovered from the hydrocracking unit and passed to an isomerization dewaxing unit to prepare base oil.

The invention discloses a lubricant for drilling fluid and a preparation method of the lubricant, and belongs to the field of oil and gas drilling chemical additives. In the water-based drilling fluid, microbubbles I with the diameter of 0.1-1 mu m and microbubbles II with the diameter of 1-10 mu m are prepared in situ, and a low-frequency sound field of 20-50 kHz and a high-frequency sound field of 200-500 kHz are adopted for alternate or superposed driving; the microbubbles I are rapidly broken to release the lubricant to achieve instantaneous efficient lubrication of the initial drilling section, and the microbubbles II are slowly broken to maintain the lubricating film to achieve lasting lubrication of the rear section. The preparation method comprises the following steps: mixing the base oil, the surfactant, the gas precursor and the foam adjusting aid in proportion, performing synchronous gas injection oscillation in a multi-frequency sound field to form a graded microbubble suspension, and performing settling separation and stabilizing treatment to obtain the product. The lubricant can obviously reduce the friction between a drilling tool and a well wall and prolong the service life of the drilling tool, is compatible with an existing slurry system, is free of waste water and waste gas emission in production, does not detect heavy metals after being used, is easy to degrade in surfactant and pollution-free to underground water, meets the requirement of green drilling, and has excellent engineering popularization value.

This invention belongs to the field of petroleum processing technology, and specifically relates to a production apparatus and method for low-pour-point base oil for aviation hydraulic oil. The production apparatus and method for low-pour-point base oil for aviation hydraulic oil includes the following steps: Hydrorefining of the oil, where the feedstock oil undergoes hydrodesulfurization and dearomatization in a two-stage series process to produce hydrorefined oil with <1% aromatics and <1 mg / kg sulfur content; Fine fractionation of the oil, specifically: the hydrorefined oil is finely fractionated in a fractionation tower to obtain hydrorefined distillate oil at 230℃~280℃; Molecular sieve dewaxing, specifically: the 230℃~280℃ hydrorefined distillate oil is subjected to deep removal of n-alkanes using a 5A molecular sieve, lowering the oil's pour point to below -75℃, producing low-pour-point, low-aromatic aviation hydraulic oil base oil. This invention uses a combined process of "low-pressure hydrorefining-molecular sieve dewaxing" to produce a low-sulfur, low-aromatic, low-pour-point base oil with less than 1% aromatics. The production method has the advantages of low investment and ease of implementation.

Methods of processing a pre-processed used lubricating oil to methods to form high quality Group II base stock, Group II+ base stock, and Group III base stock include co-processing vacuum gas oil (VGO) with pre-processed used lubricating oil.

To provide a lubricating composition for a transmission, an axle, a tractor, or an industrial gear, which achieves desired load-bearing capacity while achieving improved copper corrosion performance, and a method for lubricating a transmission.SOLUTION: A lubricating composition suitable for use in a transmission of a vehicle, the lubricating composition comprising one or more base oils of lubricating viscosity, at least about 0.35 weight percent of a thiadiazole additive, and one or more substituted trisaryl phosphites having an overall ratio of para-substituted to ortho-substituted between about 0.5 and about 2.0.SELECTED DRAWING: None

The application discloses a lens base oiling shearing machine, which comprises a box body, a supporting plate and a discharge bin are arranged in the box body, a feeding mechanism for clamping a semi-finished product lens base to position a material clamping mechanism, the material clamping mechanism for adjusting the semi-finished product lens base, a feeding mechanism for connecting the material clamping mechanism and an ultrasonic vibration falling machine through two third clamping jaw air cylinders arranged side by side, an oiling mechanism for adjusting the rotating radius of a smearing unit through a second adjusting unit, quantitatively supplying through a peristaltic pump and smearing through a sponge, the ultrasonic vibration falling machine for separating a lens base product and a water gap from the semi-finished product lens base after oiling through ultrasonic vibration falling, and a discharging mechanism for collecting the separated lens base product through a second through hole. The device has the oiling and vibration falling shearing functions of the semi-finished product lens base, can help to ensure the quantitative oiling and oiling uniformity, has high working efficiency, compact structure and wide application range.

This utility model relates to the field of printing equipment technology, and discloses a multi-layer printing quick-drying device for packaging boxes. It includes a mounting base, an input device mounted on the top right side of the mounting base, and an application mechanism mounted in the middle of the input device. The application mechanism reduces paper adhesion. A quick-drying mechanism is mounted on the top left side of the mounting base, which improves the drying speed of the paper. The application mechanism includes a second motor mounted on the inner bottom of the input device, and a rotating short column is fixedly connected to the output end of the second motor. In this utility model, the second motor drives the first and second connecting pipes to move the rolling brush. An L-shaped groove limits the movement trajectory. An oil storage component delivers matte base oil to the oil storage tank. The rolling brush picks up the base oil and evenly applies it to the paper surface, reducing paper adhesion after printing and improving the quality of the printed product.

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.

A lubricating fluid composition comprising i) a diester of polyethlene glycol esterified with a mixture of octanoic and deconoic acid where the polyethylene glycol may have 2-12 ethylene units and ii)