131 results about "Oil additive" patented technology

The utility model belongs to the technical field of lubricating oil additive filling, and particularly relates to a lubricating oil additive finished product filling device which comprises a base, supporting legs are arranged at the four corners of the bottom of the base, a filling mechanism is installed on the top of the base, and the rear end of the filling mechanism is communicated with a stirring mechanism. And a conveying mechanism is arranged below the filling mechanism. According to the filling mechanism disclosed by the utility model, the lubricating oil additive can be quickly filled through the cooperative operation of the liquid pump, the hose, the connecting pipe and the filling head. The electric telescopic rod can adjust the height of the filling head to adapt to filling containers of different specifications, and the universality of the equipment is improved; the electromagnetic valve can accurately control opening and closing of each filling head, and the accuracy of the filling amount is ensured.

The application provides an acid ester composite diesel anti-wear agent and a preparation method thereof, and belongs to the technical field of diesel additives, and comprises the following steps: S1, preparing a silanized solid acid catalyst; S2, preparing C18 polyol ester; S3, mixing an acid type anti-wear component and the C18 polyol ester, and then stirring after heating, and then adding tetrahydropyrazole pyridine derivatives and a diluent to continue stirring, and then cooling and filtering to obtain the acid ester composite diesel anti-wear agent. The application can improve the lubricity and anti-wear performance of low-sulfur diesel at a lower additive dosage, and has low corrosion and good oxidation stability.

The invention provides a diesel oil anti-wear agent and a preparation process thereof, and belongs to the technical field of diesel oil additives, and the preparation process comprises the following steps: mixing and stirring diisooctyl maleate and xylene, adding diethylenetriamine and deionized water, carrying out heating reaction, adding toluene, 4-(aminomethyl) pyridine and ethylene oxide, carrying out mixing reaction, filtering, washing, and drying to obtain the diesel oil anti-wear agent. The pyridinium-based polyester hollow capsule is prepared; the preparation method comprises the following steps: mixing xylene, catechol, ethylene phosphonic acid, ammonium persulfate and deionized water, heating, dispersing in cyclohexane, adding polyvinyl alcohol, octadecyl methacrylate and azodiisobutyronitrile, mixing and reacting to obtain catechol phosphonate nano colloidal particles; mixing and stirring the fatty acid ester solution, the oleoyl fluorocarbon copolymer and the pyridinium-based polyester hollow capsule, adding the catechol phosphonate nano colloidal particles, continuously stirring, performing ultrasonic treatment, and degassing to obtain the diesel oil anti-wear agent. The diesel oil antiwear agent can improve the antiwear property and demulsibility of the diesel oil antiwear agent.

The invention provides a nitrogen-containing boric acid ester-nano hybrid composite anti-wear additive as well as a preparation method and application thereof, and belongs to the technical field of lubricating oil additives. The nitrogen-containing boric acid ester, the functionalized nanoparticles, the ionic liquid, the auxiliary anti-wear agent and the dispersion stabilizer are subjected to nano-scale hybrid compounding, and the nitrogen-containing boric acid ester, the functionalized nanoparticles, the ionic liquid, the auxiliary anti-wear agent and the dispersion stabilizer have a synergistic effect on four aspects of physical bearing, chemical adsorption, interface modification and extreme pressure enhancement; a multi-synergistic lubrication and protection system of an adsorption film, a physical isolation layer, an extreme pressure reaction layer and rolling lubrication microspheres is constructed, efficient wear resistance, friction reduction, bearing and stability improvement are jointly achieved, and the lubricating oil is suitable for insoluble base oil.

The application belongs to the technical field of lubricating oil additives, and particularly relates to a polyisobutylene succinimide dispersant as well as a preparation method and application thereof. The preparation method comprises the following steps: mixing polyisobutylene maleic anhydride, base oil and aromatic hydrocarbon solvent, then adding aminobenzene boronic acid, and performing reaction by increasing temperature to reflux temperature, and obtaining the polyisobutylene succinimide dispersant after filtration. The polyisobutylene succinimide dispersant is prepared by using polyisobutylene maleic anhydride and aminobenzene boronic acid, the molecular structure of the polyisobutylene succinimide dispersant contains not only an aromatic ring but also an oxygen-containing benzene boronic acid group, the aromatic ring and the benzene boronic acid group both have a good adsorption effect on soot particles, and the ability of the polyisobutylene succinimide dispersant to disperse soot is improved. The performance test results show that the oil product prepared by using the polyisobutylene succinimide dispersant of the application not only improves the soot dispersion performance of the oil product, but also improves the high-temperature detergency of the oil product, and the preparation process is simple and easy to implement.

The utility model relates to the technical field of reaction kettles, in particular to a reaction kettle for purifying lubricating oil additives, which comprises a lifting and storing tank, a feeding pipe, a discharging component and stirring blades, an air pressure balance tank is mounted on the upper side of the lifting and storing tank, and a first exhaust pipe is arranged at one end of the upper side of the lifting and storing tank; a first air pump is installed at one end of the first air suction pipe, a first air outlet pipe is installed at one end of the lower side of the air pressure balance tank, a second air outlet pipe is arranged at the other end of the upper side of the lifting and storing tank, and a second air pump is installed at one end of the second air outlet pipe. The discharging component is detachable, the reaction kettle is convenient to clean after the purification reaction, the detachable filtering structure is arranged, the use convenience is improved, the air pressure in the extraction and storage tank is adjusted through the air pressure balance tank, the flatness and stability of the air pressure in the extraction and storage tank in the working process are improved, and the purification reaction efficiency is improved.

The utility model relates to the technical field of lubricating oil additive proportioning, and discloses a lubricating oil additive proportioning device which comprises a supporting plate, a circular plate, a proportioning box and a lifting mechanism, a material box is arranged on the supporting plate, and according to the lubricating oil additive proportioning device, the circular plate is arranged at the bottom end of a branch pipe body of a material guide pipe; a matching box rotationally connected with the circular plate is arranged below the supporting plate, a discharging control mechanism is arranged at the bottom of a material cavity of the matching box, a plurality of connecting rods are arranged on the lifting mechanism, a discharging barrel is arranged at one end of each connecting rod, and additives in a material box are guided into the multiple material cavities of the matching box through a material guiding pipe. When an additive with a required amount is needed, only the proportioning box needs to be rotated to be switched to the material cavities with the corresponding required amount, then the additive is guided out through cooperation of the discharging barrel and the discharging control mechanism, after the proportioning box is rotated, the empty material cavities can be automatically filled through the material guiding pipe, repeated weighing by workers is not needed, time is greatly saved, and the working efficiency is improved.

The invention discloses an oil-soluble Mo-functionalized graphene composite material as well as a preparation method and application thereof, and belongs to the field of lubricating oil additives. The preparation method comprises the following steps: (1) mixing a Mo-functionalized graphene composite material with an organic solvent, and performing ultrasonic treatment to form a solution A; (2) adding an amine reducing agent into the solution A, carrying out reduction reaction, filtering and washing to obtain a filter cake; and (3) mixing a long-chain organic compound, a coupling agent and a surfactant, performing ultrasonic treatment to form a mixed solution B, performing ultrasonic dispersion on the filter cake into the mixed solution B, and performing heating treatment, cooling, filtering, washing and drying to obtain the oil-soluble Mo-functionalized graphene composite material. Through partial reduction and chemical grafting processes, the Mo-functionalized graphene composite material is subjected to selective reduction firstly, then a coupling agent is utilized to graft a long-chain organic compound to the surface of the composite material, and an oil-soluble group is introduced, so that the dispersion stability and the anti-wear and anti-friction performance in lubricating oil are remarkably improved.

The utility model provides a dust recovery mechanism for producing a lubricating oil additive, and belongs to the technical field of dust recovery mechanisms. Comprising a dust suction box and a dust suction frame fixed to the bottom end of the side wall of the dust suction box, a filter plate is fixedly embedded in the top end of the dust suction box, a baffle is fixed to the center of the bottom wall of the dust suction box, a conveying frame is fixed to the top end of the baffle, and a flow guide plate of an arc-shaped structure is installed at the top end of the conveying frame; a water conveying mechanism connected with the conveying frame is arranged at the center position of the baffle. The water pump enables water flow to flow along the conveying frame, the water outlet groove and the top wall of the flow guide plate through the conveying pipe, water curtains are formed on the two sides of the baffle, the draught fan in the dust collection frame enables air to enter the dust collection box after being started, dust carried in the air is adsorbed by the water curtains and flows downwards, the dust in the air is conveniently adsorbed, and the dust collection efficiency is improved. Dust needing to be filtered by the filter plate is greatly reduced, and the situation that the filter plate is blocked by the dust is reduced.

The embodiment of the invention provides a method for preparing high-performance heavy alkyl benzene sulfonic acid barium salt by modifying a heavy alkyl benzene raw material, and relates to the technical field of synthesis of lubricating oil additives. The method for preparing the high-performance heavy alkyl benzene sulfonic acid barium salt by modifying the heavy alkyl benzene raw material comprises the following steps: S1, selecting narrow-fraction long-straight-chain alpha-olefin with the carbon number range of C10-C14 as an alkylating agent, and carrying out Friedel-Crafts alkylation reaction on the alkylating agent and benzene in the presence of a Lewis acid catalyst at the reaction temperature of 30-70 DEG C according to the molar ratio of the benzene to the alpha-olefin of 3: 1-8: 1; the reaction time is 1-4 hours, and after the reaction is completed, carrying out hydrolysis, layering and distillation purification; by physically mixing the narrow-fraction long-straight-chain alpha-olefin synthesized heavy alkylbenzene with regular structure and low branching degree with commercially available heavy alkylbenzene, the molecular homogeneity of the raw material is optimized, the reaction consistency and the salifying stability are improved on the premise of not changing the existing process, and the barium heavy alkylbenzene sulfonate product with better damp-heat and salt spray performance is prepared.

The utility model relates to the field of petroleum additive production equipment, in particular to an oil-based petroleum additive diluting device which comprises a diluting tank, a lower liquid inlet pipe extending into the diluting tank is arranged at the lower end of the diluting tank, a liquid distribution disc is arranged at the upper end of the lower liquid inlet pipe, a plurality of liquid outlets are formed in the side face of the liquid distribution disc, and a conical flow guide block is arranged at the upper end of the liquid distribution disc. An upper liquid inlet pipe extending to the upper part of the diluting tank is vertically arranged above the conical flow guide block; and a liquid outlet valve is arranged at the lower end of the diluting tank. The device has the advantage of uniform dilution.

The application discloses a kind of quaternary ammonium mannich base, quaternary ammonium mannich base multifunctional fuel additive and its preparation method and application.The quaternary ammonium mannich base, its structural formula is as shown below:Wherein, m=10~90, preferably m=15~80;N=0~20, preferably n=2~10;R1, R2, R3 same or not same, respectively independently H or C1-C4 alkyl;R4 is H, CH3 Or C2H5;R5 is C3-C8 alkyl or aryl, preferably C3-C8 alkyl;R6 is CH3 Or C2H5;X is SO4 Or CO3.The multifunctional fuel additive comprising quaternary ammonium mannich base of the application not only has good dispersibility, has the effect of reducing the accumulation amount of vehicle engine carbon deposit, but also can effectively reduce the balance point temperature, solve diesel engine particulate filter (DPF) passive regeneration failure, reduce the number of active regeneration, prolong regeneration mileage.

The application discloses a combustion-supporting and corrosion-preventing type colloidal magnesium-based heavy oil additive and a preparation method thereof. The heavy oil additive is prepared from the following components in parts by weight: magnesium oxide 50-80 parts, bentonite 10-15 parts, lime powder 5-10 parts, nano silicon dioxide 10-15 parts, basic copper chloride 5-10 parts, diaspore powder 10-15 parts, sodium dodecyl benzene sulfonate 2-8 parts, hydrocarbon solvent 2-8 parts, combustion-supporting dispersant 2-8 parts, and water 80-100 parts. The additive can inhibit the combustion of sulfur in the heavy oil to generate sulfur oxides, low-temperature sulfur corrosion and the synergistic corrosion of HCl. In the low-temperature section, the basic components such as lime powder react with HCl to generate salt compounds, neutralize the acidic substances in the flue gas, and significantly increase the pH value to above 8, thereby preventing the low-temperature dew point corrosion of the tail heating surface.

The invention belongs to the technical field of fuel additives and clean energy. The invention provides a fuel oil additive, which is prepared from 40 to 60 parts of fatty acid ester, 10 to 20 parts of alcohol ether compounds, 1 to 3 parts of nanometer oxides, 2 to 4 parts of surfactants, 1 to 2 parts of oxidation stabilizers, 2 to 3 parts of sodium benzoate, 1 to 2 parts of 2, 6-dimethyl pyridine, 0.5 to 1 part of metal organic catalytic combustion improvers and 20 to 30 parts of solvent oil. The fuel additive can significantly improve the fuel combustion efficiency, reduce the fuel consumption, reduce the emission of CO, HC, NOx and soot, and improve the combustion stability and storage performance. The additive selects part of bio-based raw materials, has the characteristics of energy conservation, emission reduction, greenness and low carbon, is suitable for the field of combustion-supporting modification of gasoline, diesel oil and biofuel, and has good environmental benefits and application prospects.

The invention relates to the technical field of lubricating oil additives, and discloses an environment-friendly additive for replacing a phosphorus-chlorine antiwear agent.The preparation method comprises the following steps that base oil is added into a reaction kettle, stirring is conducted for 15-20 min at the temperature of 50-70 DEG C at the speed of 300-600 rpm, then molybdenum oleate, modified hydrotalcite, modified eugenol and octyl dimethylbenzene are sequentially added under continuous stirring, uniform mixing is conducted, and the additive is obtained. The environment-friendly additive for replacing the phosphorus-chlorine anti-wear agent is obtained. Under high temperature and high pressure generated by friction, molybdenum oleate can be decomposed to form a molybdenum disulfide solid lubricating film with low shear strength, so that the wear resistance of the additive is enhanced; stearic acid is used for modifying hydrotalcite, so that the anti-wear effect is synergistically enhanced; an organic silicon chain segment in the modified eugenol can provide auxiliary lubrication, and polar groups are adsorbed on the metal surface, so that the corrosion resistance of the additive is improved; and the additive does not contain phosphorus, chlorine and other harmful elements, and accords with the development direction of modern green manufacturing and environment-friendly lubrication.

The invention relates to the field of lubricating oil additives, in particular to a sulfur-phosphorus-free non-toxic ester polymer lubricating oil extreme pressure anti-wear additive, which is prepared from the following components in parts by mass: 18 to 22 parts of modified epsilon-caprolactone monomer, 3.5 to 4.5 parts of 5-carboxybenzotriazole, 0.3 to 0.4 part of catalyst 4-dimethylaminopyridine and the like. According to the invention, a stable organic-inorganic hybrid system is constructed by innovatively performing molecular modification and compounding on a functional ester polymer, a heterocyclic compound and a two-dimensional nano material. Compared with the prior art, the additive has the advantages that harmful elements such as sulfur and phosphorus are completely abandoned, synergistic improvement of multiple properties such as extreme pressure antiwear, friction reduction and corrosion resistance is realized, the service life of equipment is effectively prolonged, the environmental burden is reduced, and the additive has a wide application prospect in the fields of high-end equipment manufacturing, new energy automobiles and the like with strict requirements on lubricating materials.

The invention relates to the technical field of diesel additives, and particularly discloses a multi-effect composite diesel additive and a preparation method thereof. The additive comprises the following components in parts by weight: 7-11 parts of an anti-wear agent, 5-8 parts of a cetane number improver, 4-6 parts of a clearing agent, 2-3 parts of an antioxidant, 3-4 parts of a solubilizer, 3-4 parts of a pour point depressant, 1-2 parts of a preservative and 4-7 parts of a multifunctional additive. The invention also provides a preparation method of the composition. All the components act together to achieve the multiple effects of improving the combustion quality, reducing emission, strengthening lubrication and the like, in addition, the prepared auxiliary agent integrates multiple functions, and the oil phase adaptability and the functional strength can be guaranteed.

This utility model belongs to the technical field of lubricating oil additive production equipment. Specifically, it discloses a reaction device for producing lubricating oil additives. The reaction tank is equipped with a stirring shaft, and the stirring shaft is fixedly connected from top to bottom with a paddle stirring blade, a double spiral stirring blade, and a turbine stirring blade. A processing box is fixedly connected to the top of the condenser, and a condenser tube is installed inside. A water pipe is sleeved on the outside of the straight part of the condenser tube, and a spiral guide plate is installed on the straight part inside. A vertically arranged reaction layer is fixedly connected in the second chamber, and several horizontally arranged activated carbon layers are fixedly connected in the first chamber. A liquid outlet pipe is fixedly connected to the bend at the lower end of the condenser tube. This utility model makes the reaction more uniform by setting three different stirring blades. By setting the condenser tube, reaction layer, and activated carbon layer, harmful gases can be purified multiple times to avoid environmental pollution.

The invention belongs to the field of lubricating oil, and particularly relates to an oil additive composition for a screw air compressor with an ultra-long oil change period and application of the oil additive composition. The additive composition comprises the following raw materials in parts by weight: 50-80 parts of an antioxidant, 1-10 parts of an anti-rust agent, 1-10 parts of an anti-wear reagent at extreme pressure, 1-10 parts of a metal deactivator and 1-3 parts of an anti-foaming agent, the antioxidant is selected from an amine type antioxidant or a mixture of the amine type antioxidant and a phenol type antioxidant. The additive composition provided by the invention shows excellent oxidation resistance, provides good anti-corrosion protection for metals, and reduces the generation of oil sludge paint films. The composition is stable and excellent in performance, provides excellent protection for continuous operation (the exhaust temperature reaches up to 200 DEG C) under severe conditions and at high temperature, has an ultra-long oil change period which is up to 24,000 hours and is three times that of conventional synthetic screw air compressor oil, and can meet the lubrication requirements of vane type and rotary screw air compressor systems.

The invention discloses a graphene composite lubricating additive as well as a preparation method and application thereof, and belongs to the technical field of lubricating additive preparation. Modified graphene, nano molybdenum disulfide, a dispersing agent and thiophosphate amine salt are mixed and react to obtain the graphene composite lubricating additive. According to the invention, a triple synergistic stabilization mechanism of chemical anchoring, physical blocking and steric hindrance is utilized, so that the compatibility of graphene and base oil is improved, and the dispersion stability of the graphene composite lubricating additive is improved. Meanwhile, the prepared graphene composite lubricating additive can reduce the temperature of a friction pair, can form a friction reaction film containing C, Mo, P and O elements on the surface of the friction pair, reduces friction wear, shows good friction reduction and wear resistance, provides a theoretical basis and technical support for development of high-performance lubricating oil additives and application of high-temperature working conditions, and has wide application prospects. And the high-temperature lubrication problem of the marine diesel engine is solved, and remarkable engineering value and application prospects are achieved.

The application discloses a two-dimensional covalent organic polymer composite lubricating oil additive, a preparation method and application thereof, and provides a two-dimensional covalent organic polymer composite lubricating oil additive which can simultaneously have nitrogen-containing, sulfur-free and phosphorus-free, environmental protection, energy saving, excellent wear resistance, and can reduce corrosion of metal parts and prolong service life. The additive prepared by the application has relatively stable physical and chemical properties, can prolong the service life of lubricating oil, improves the dispersibility of traditional two-dimensional covalent organic polymers in lubricating oil, and simultaneously widens the application range of the two-dimensional covalent organic polymers.

The present invention provides a lubricant additive composition for reducing a friction coefficient and improving wear resistance, and more specifically, the lubricant additive composition is characterized by containing an emulsion solution in which silicon nanoparticles, zinc nanoparticles, and cerium nanoparticles are dispersed. As described above, the lubricating oil additive containing the emulsion solution in which the silicon, zinc, and cerium nanoparticles are dispersed reduces the friction coefficient of the lubricating oil, thereby improving fuel efficiency, reducing exhaust gas, and improving the lifespan of a vehicle.

This invention relates to the field of oil additives for power generation, specifically a method for in-situ preparation of black phosphorus nanoparticles (BPNPs) using PVA / PAAM interpenetrating network hydrogel as a microreactor and its application as a wear-resistant additive in lubricating oils. The confinement effect of the interpenetrating network hydrogel results in uniform BPNP size and high crystallinity, thus endowing BPNPs with excellent air / water / oil stability, with an oxidation rate of <5% within 7 days. Swelling allows RP / KI to permeate uniformly and be physically embedded in the network. Subsequently, under a nitrogen protective atmosphere, photolysis of iodine ions generates solvated electrons (e). ‑ (aq) restores RP to P ‑ P ‑ The BP crystal nucleus is formed by recombination, and the IPN three-dimensional nanochannels (pore size 30~120nm) confine and inhibit excessive growth of the crystal nucleus. At the same time, the PVA hydroxyl groups and PAAm amide groups passivate the BP surface in situ through hydrogen bonding / coordination, preventing oxidation.

The present application relates to the technical field of fuel additive, in particular to a high-energy cleaning type composite solid fuel additive and a preparation method thereof. The additive comprises the following raw materials: myristic acid, stearic acid, a composite catalytic unit, modified soybean lecithin, tributyl borate, butylated hydroxyanisole and polyethylene glycol monostearate. The composite catalytic unit is prepared by coordination of diethyl phosphinic acid with manganese chloride, lanthanum chloride and cerium chloride; the modified soybean lecithin is obtained by ammonolysis and intramolecular lactonization and contains a five-membered cyclic phosphonate structure. During preparation, the components are dispersed by ultrasonic dispersion after being loaded on a melting carrier, and then solidified and formed. The additive realizes cleaning and repair integration through double-metal synergistic catalysis and combustion strengthening, and the composite carrier can controllably release and adapt to all working conditions. The product is soft and easy to discharge, has high economic efficiency and environmental compatibility, and is convenient to store and use.

The invention belongs to the technical field of lubricating oil and lubricating oil additives, and particularly relates to a mining machinery gear lubricating oil composition as well as a preparation method and application thereof. The lubricating oil composition is prepared from the following raw materials in percentage by mass: 0.1%-1% of a sulfur-containing extreme pressure agent, 0.3%-2.5% of a phosphorus-containing anti-wear agent, 0.2%-1.5% of an antioxidant, 0.03%-0.1% of a metal deactivator, 0.02%-0.08% of an anti-rust agent, 0.02%-0.05% of a composite anti-foaming agent, 0.003%-0.01% of a demulsifier, 0.01%-0.1% of a pour point depressant and the balance of base oil. The special gear oil composition for mines has outstanding high foam inhibition characteristic, excellent extreme pressure wear resistance and corrosion resistance, and excellent low-temperature fluidity and viscosity-temperature characteristic.

The invention provides a lubricating oil additive, a preparation method thereof and lubricating oil. The lubricating oil additive comprises composite polymer nanoparticles, the composite polymer nanoparticles have a core-shell structure composed of a multi-component copolymer, and the multi-component copolymer comprises a polymer A and a polymer B; wherein the shell comprises a polymer A, the core comprises a polymer B, and the polymer B has a cross-linked structure; and the polymer A is connected with the polymer B through a covalent bond. The composite polymer nanoparticles in the lubricating oil additive are good in dispersity, the friction coefficient of lubricating oil can be effectively reduced, abrasion is reduced, and the lubricating performance is improved.

The utility model relates to the technical field of feed manufacturing, in particular to an oil additive mixing device for feed, which comprises a mixing tank, a mixing mechanism is arranged in the mixing tank, a stirring motor is fixedly connected to the center of the top of the mixing tank, and a controller is mounted on the front side of the mixing tank. The oil additive mixing device comprises a mixing tank, a liquid inlet pipe is installed on the right side of the center of the top of the mixing tank, a feeding hopper is installed on the left side of the center of the top of the mixing tank, a binding post is installed on the front face of the mixing tank, and a liquid inlet spray head is fixedly connected to the bottom of the liquid inlet pipe. The mixing device in the device is used for mixing the oil additives, and the problems that the existing oil additives are generally sprayed into the mixing device through a spray head, the viscosity of the oil additives is high, after the oil additives are put into the mixing device, the feed is prone to caking, and the mixing effect of the oil additives and the feed is affected are solved.

The invention belongs to the technical field of lubricating oil additives, and particularly relates to a fluorine-containing imidazoline derivative lubricating oil additive as well as a preparation method and application thereof. The fluorine-containing imidazoline derivative lubricating oil additive disclosed by the invention has a chemical structure as shown in a formula (I). The novel fluorine-containing imidazoline derivative lubricating oil additive provided by the invention can be completely dissolved in fluoroether oil, so that the antirust performance of the lubricating oil additive is greatly improved, and the stability and the oxidation resistance of the lubricating oil additive are excellent; the invention also provides a preparation method of the fluorine-containing imidazoline derivative lubricating oil additive, the yield of the product prepared by the method is more than 85%, the raw materials are simple, the cost is low, the process is simple, and the fluorine-containing imidazoline derivative lubricating oil additive has a wide application prospect. Wherein R is a linear chain or branched chain alkyl group of C1-C12; r1f is CF3 (OCF2CF2) m (OCF2) nCF2, m is any integer from 5 to 9, and n is any integer from 10 to 16.

The invention provides a modified cellulose nanocrystal, a preparation method and application of the modified cellulose nanocrystal in a lubricating oil additive, and belongs to the technical field of nano lubricating additives. According to the preparation method, cellulose nanocrystals are subjected to sulfonation modification, and then the modified cellulose nanocrystals are obtained through hydrogen bond interaction between amino or ether groups of flexible molecules and sulfonic acid groups; the modified cellulose nanocrystal can be stably dispersed in various biomass base oils for a long time, and can be used as a lubricating oil additive; the friction coefficient of a lubricating oil system added with a small amount of modified cellulose nanocrystals is reduced by 50% or above, the wear rate is reduced by about 75% or above, good lubricating performance is kept under harsh friction operation conditions, and good practicability is achieved.

This invention discloses a compound additive and its application in removing corrosive sulfur from mineral insulating oil, relating to the field of insulating oil additives. It includes a first inhibitor, a second inhibitor, a first antioxidant, and a second antioxidant. The first inhibitor is a benzotriazole derivative, and the second inhibitor is a thiadiazole derivative and / or methylbenzotriazole. The first antioxidant is pyrogallol, and the second antioxidant is butylated hydroxytoluene and / or tert-butylhydroquinone. This additive uses a compound inhibitor and a compound antioxidant. When applied to mineral insulating oil, the synergistic effect of the compound inhibitor improves the insulating oil's resistance to corrosive sulfur. Simultaneously, the compound antioxidant and compound inhibitor are balanced to maximize the insulating oil's oxidation resistance, providing continuous and efficient protection for mineral insulating oil in actual operation, resulting in excellent physical and electrical properties.