588 results about "Pour point" patented technology

The invention relates to the field of intelligent preparation, and provides high-temperature-resistant and high-pressure-resistant lubricating oil and a preparation method thereof.The preparation method comprises the steps that a-olefin synthetic oil in a preset proportion is added into a blending kettle provided with a stirring device, then an antioxidant preservative, an extreme-pressure phosphorus-containing ash-free anti-wear agent and an amine high-temperature antioxidant are sequentially added into the blending kettle, stirring is conducted, and the high-temperature-resistant and high-pressure-resistant lubricating oil is obtained; the preparation method comprises the following steps: uniformly stirring at a first constant temperature to obtain a primary mixture, sequentially adding an antirust agent, a metal cleaning agent and a pour point depressant into the mixture, continuously stirring at a second constant temperature, intelligently controlling the stirring time by deeply analyzing the stirring state of the mixture in the stirring process, and finally preparing the high-temperature-resistant and high-pressure-resistant lubricating oil. Therefore, the quality and the performance of the high-temperature-resistant and high-pressure-resistant lubricating oil product can be effectively ensured.

The invention provides wear-resistant and corrosion-resistant lubricating oil and a preparation method thereof. The wear-resistant and corrosion-resistant lubricating oil is prepared from the following raw materials in parts by weight: 88-92 parts of base oil, 3-6 parts of phosphate and ammonium phosphate co-grafted graphene oxide, 0.5-1 part of a purification dispersant, 0.5-1 part of an antirust agent, 2-4 parts of an antioxidant, 0.5-1 part of a defoaming agent and 0.5-1 part of a pour point depressant. The phosphate and the ammonium phosphate are jointly grafted with the graphene oxide, and the wear resistance and the corrosion resistance of the lubricating oil are synergistically improved by utilizing the'nano bearing 'effect of a phosphate group, an ammonium phosphate group and the graphene oxide; meanwhile, by utilizing the capacity of ammonium phosphate groups for neutralizing acidic substances and the chelation of phosphate groups and combining the high specific surface area and barrier property of the graphene oxide, the anti-corrosion and anti-oxidation effects are further enhanced. Through a multifunctional synergistic effect, the problem that a traditional additive is single in function is solved, and the service life of the lubricating oil in high-temperature, high-load and extreme environments is remarkably prolonged.

The invention relates to non-aqueous insulating cooling liquid for a cold source end of a liquid cooling heat dissipation system and a preparation method of the non-aqueous insulating cooling liquid. The preparation method comprises the following steps: (1) dispersing nano boron nitride particles in absolute ethyl alcohol, adding a silane coupling agent, and uniformly stirring; heating to 30-40 DEG C, stirring and reacting for 2-4 hours, filtering, washing and drying to obtain modified boron nitride; and (2) adding the modified boron nitride into the modified silicone oil, and ultrasonically stirring uniformly to obtain the non-aqueous insulating cooling liquid, wherein the organic functional group of the modified silicone oil is methacrylic acid, and the viscosity at 25 DEG C is 2-10 mm < 2 > / s. According to the non-aqueous insulating cooling liquid prepared by the preparation method disclosed by the invention, the modified boron nitride can be lastingly and stably wrapped in the methacrylic acid modified silicone oil with the spiral structure, and is still not layered after standing for 60 days at 30 DEG C; the pour point is low, and pipelines do not need heat preservation; and even if the insulating liquid is mixed into insulating cooling liquid which is in direct contact with the electronic component, the short circuit of the electronic component can be avoided.

The invention discloses Pickering emulsion applied to concrete demolding and a preparation method thereof, and relates to the technical field of building materials. The Pickering emulsion is prepared from the following raw material components: 200 to 600 parts of base oil, 50 to 60 parts of a compound emulsifier, 50 to 60 parts of a co-emulsifier, 1 to 2 parts of a dispersed phase pour point depressing component, 0.5 to 1 part of an antioxidant, 8 to 10 parts of a continuous phase thixotropic stabilizing component, 10 to 15 parts of a color regulating agent and 500 to 550 parts of water. The Pickering emulsion has excellent concrete demoulding performance, also has concrete self-curing performance and anti-ultraviolet performance, and can effectively improve the structural strength of concrete, prolong the service life of concrete and ensure the appearance quality of concrete. The problems existing in a traditional release agent are solved, additional functionality and attractiveness are provided for concrete products, and the release agent is suitable for various building and infrastructure projects and has wide application prospects.

The invention relates to the field of lubricating oil, and particularly discloses low-temperature-resistant lubricating oil and a production process thereof. The low-temperature-resistant lubricating oil is prepared from the following raw materials in parts by weight: 12 to 18 parts of ester plant-based synthetic oil, 6 to 9 parts of poly-alpha-olefin synthetic oil, 0.2 to 0.6 part of a viscosity index improver, 0.2 to 0.5 part of a preservative, 0.2 to 0.5 part of a de-foaming agent, 18 to 22 parts of water, 0.2 to 0.6 part of an anti-friction and anti-wear agent and 1 to 2 parts of a pour point depressant, the pour point depressant is prepared from an ethylene-vinyl acetate-vinyl alcohol terpolymer, modified silicon dioxide and graphene oxide according to the mass ratio of 1: (0.2 to 0.4): (0.1 to 0.3). The lubricating oil provided by the invention has the advantages of low condensation point, good low-temperature fluidity and strong anti-attrition and anti-wear capability.

The invention discloses high-performance anti-wear engine lubricating oil as well as a preparation method and application thereof. The high-performance anti-wear engine lubricating oil is prepared from the following raw materials: self-developed lubricating oil base oil, poly-alpha-olefin, zinc dialkyl dithiophosphate, calcium sulfonate, polyisobutylene succinimide, an antioxidant, polymethacrylate, an organic molybdenum complex, a de-foaming agent and a pour point depressant. The preparation method comprises the following steps: 1) synthesizing 9, 10-bis (2-tert-butyl-4-methylphenoxy) trimethylolethane stearate as base oil of the lubricating oil; and 2) mixing the base oil with other assistants to obtain the high-performance anti-wear engine lubricating oil. According to the preparation method, novel-like synthetic ester oil is firstly prepared, a phenol group and a large steric hindrance substituent group are introduced into a polymer, the anti-oxidation function is directly built in base oil molecules, meanwhile, super-strong heat resistance is achieved, and finally the high-performance anti-wear engine lubricating oil is obtained and can be applied to high-end application scenes such as aero-engines or gas turbines.

The invention relates to the technical field of lubricating oil, and provides natural gas engine lubricating oil as well as a preparation method and application thereof. The natural gas engine lubricating oil comprises the following components in parts by weight: 1-5 parts of a clearing agent, 1-15 parts of a dispersing agent, 1-10 parts of an antioxidant, 0.1-1 part of a pour point depressant, 0.01-1 part of an anti-foaming agent and 60-95 parts of base oil, the antioxidant comprises ZDDP, an amine type antioxidant and an amino thioester antioxidant according to the weight ratio of 1: (3-8): (3-8). The natural gas engine lubricating oil provided by the invention not only has good high-temperature detergency, oxidation resistance, dispersity and wear resistance through the synergistic effect of different types of antioxidants, but also has excellent nitration resistance, and can completely meet the use requirements of the natural gas engine lubricating oil, and the sulfate ash content can be controlled to be 0.4-0.6%.

The invention provides an easily-coagulated wax-containing crude oil pipeline conveying control system and method. The method comprises the steps that viscosity data of easily-coagulated wax-containing crude oil at a detection point in the conveying process and parameter data of all working conditions are collected; determining an abnormal point of each working condition parameter data according to the viscosity data, screening out a plurality of effective data from the corresponding working condition parameter data through each abnormal point, and determining redundancy deviation according to all the effective data; and performing optimization on each working condition parameter based on the redundancy deviation to obtain the sensitivity of the change of the viscosity of the easily-coagulated wax-bearing crude oil to the data change under different working condition parameters, and determining a predicted value of the viscosity of the easily-coagulated wax-bearing crude oil according to all the sensitivity. And controlling the output power of the pour point depressing device in the conveying process of the easily-coagulated wax-containing crude oil pipeline according to the predicted value. By adopting the scheme of the invention, the proper working condition parameters can be selected to predict the viscosity of the crude oil, so that the extra consumption in the crude oil transportation operation is reduced.

The invention belongs to the technical field of hydraulic oil, and particularly discloses super-lubricity energy-saving anti-wear hydraulic oil and a preparation method thereof. The super-lubricity energy-saving anti-wear hydraulic oil is prepared from the following components in parts by weight: 75 to 90 parts of composite base oil, 5 to 7 parts of viscosity index improver, 3 to 5 parts of friction improver, 1 to 3 parts of pour point depressant, 0.005 to 2 parts of anti-rust preservative, 0.003 to 0.02 part of demulsifying agent, 0.01 to 0.03 part of anti-foaming agent, 0.05 to 1 part of clearing agent, 0.05 to 2 parts of antioxidant and 0.05 to 1.5 parts of metal deactivator, the composite base oil is composed of coal base oil, second-class base oil and alkyl naphthalene base oil according to the mass ratio of 5: 4: 1. The super-lubricity energy-saving anti-wear hydraulic oil provided by the invention is high in viscosity index, excellent in shear stability, excellent in oxidation stability, excellent in low-temperature performance and small in friction coefficient, the service life of a product is greatly prolonged, the super-lubricity energy-saving and environment-friendly performance requirements are met, and the super-lubricity energy-saving anti-wear hydraulic oil has a wide application prospect.

The invention relates to a pour point depressing paraffin inhibitor and a preparation method thereof. The pour point depressing paraffin inhibitor is prepared from the following raw material components: graphene oxide, acrylic acid, a dispersing agent, a catalyst and a solvent, wherein the content of the graphene oxide is 4%-14.5% by mass, the content of the acrylic acid is 38%-76% by mass, the content of the dispersing agent is 4%-6% by mass, and the content of the catalyst is 1%-2% by mass. The graphene oxide is introduced into the pour-point depressing paraffin inhibitor provided by the invention, the size nanocrystallization is easy to prevent the formation of wax crystals in crude oil, the pour-point depressing effect is good, and the crude oil is conveniently exploited from a shaft and transported by a crude oil pipeline.

The invention relates to the technical field of marine fuel oil additives, and particularly provides a marine fuel oil purification synergist and a preparation method thereof. The marine fuel oil purification synergist comprises the following components in percentage by mass: 8%-12% of a sulfur capturing agent, 15%-20% of a core-shell dispersing agent, 5%-8% of a lubricating agent, 0.5%-1% of an antioxidant, 1%-2% of a pour point depressant and the balance of a solvent. The marine fuel oil purification synergist has the advantages of high flash point, sulfur inhibition, combustion enhancement and dispersion stability. The multi-component synergistic system not only greatly improves the combustion efficiency of the marine fuel oil, but also effectively inhibits the emission of harmful substances, obviously reduces the carbon deposition and wear of an engine, and keeps the cleanliness of a fuel oil system. In practical application, the synergist shows excellent environment-friendly benefits and economic benefits, and a green fuel solution which can meet increasingly strict requirements of environment-friendly laws and regulations and can reduce the operation cost is provided for the ship industry.

The invention relates to the technical field of pour point and condensation point measurement, in particular to a pour point and condensation point precise measurement method, system and equipment. The method comprises the following steps of: determining a condensation tendency index according to a temperature data sequence fluctuation characteristic, a humidity data sequence change trend and a coupling difference characteristic between temperature and humidity data sequences; a control redundancy index is determined according to the continuous working time of the fan, the condensation tendency index and the numerical deviation characteristics between the power and humidity data sequences; according to the instantaneous change characteristics of adjacent data points in the humidity data sequence, the temperature data sequence and the power data sequence of the current time window, determining a collaborative benefit index; determining a comprehensive evaluation score according to the collaborative benefit index and the control redundancy index; controlling the fan to execute a corresponding operation strategy according to the comprehensive evaluation score and a preset mapping relation between the score and the operation strategy; the operation strategy is repeatedly adjusted until the pour point and the condensation point of the sample are determined, and therefore the fan power responds to environment changes in real time.

The invention relates to the technical field of biological aviation kerosene, and discloses a process for preparing biological aviation kerosene from waste grease. The method comprises the following steps: introducing waste oil into a hydrofining reactor, introducing hydrogen, carrying out a hydrodeoxygenation reaction under the catalysis of a hydrogenation catalyst, carrying out a reaction on the obtained hydrodeoxygenated oil in an isomerization pour point depressing reactor, and finally carrying out isomerization hot high-pressure separation treatment, isomerization cold high-pressure separation treatment and rectification tower segmentation to obtain the biological aviation kerosene. The specific surface area of a carbon matrix of the hydrogenation catalyst is large, the void structure is rich, a large number of Ni-Mo-P active catalytic centers can be exposed, precious metals such as platinum and ruthenium do not need to be added, the hydrodeoxygenation reaction efficiency of waste oil and fat is remarkably improved, the mass fraction of branched paraffin and cycloparaffin in biological aviation fuel is high, and the combustion performance is better.

The invention relates to the technical field of lubricating oil, and discloses a low-temperature-resistant lubricating oil composition and a preparation method thereof. Mineral oil, modified polymethacrylate, a dispersing agent, an antioxidant and an oil defoaming agent are stirred and mixed and then filtered, and the low-temperature-resistant lubricating oil composition is obtained. The cross-linking agent enables polymethacrylate to form a light cross-linked structure, and stress can be dispersed during shearing; nitrogen atoms in triazinyl, pyridyl, pyrrolidone and Mannich base structures serve as hydrogen bond receptors, the hydrogen bond interaction with hydroxyl on a polymethacrylate molecular chain is enhanced, a physical cross-linked network is formed, and the shear resistance is further improved; in the modified low-temperature-resistant monomer, the glass-transition temperature can be remarkably reduced by high flexibility of silicon oxygen bonds in long straight-chain alkyl and silane groups, so that a molecular chain can still move at a low temperature, and the low-temperature fluidity of the lubricating oil is improved; the cyclic structure of cyclohexyl can effectively interfere with the ordered arrangement of wax crystals, reduce the pour point of the lubricating oil and improve the low-temperature fluidity.

The invention belongs to the technical field of crude oil pour point depressants, and particularly relates to a crude oil pour point depressant and a preparation method thereof. The crude oil pour point depressant comprises a lauryl methacrylate-maleic anhydride-(alpha-methylstyrene) terpolymer, 50-60 parts of a modified ethylene-vinyl acetate copolymer, 10-20 parts of an inorganic nano pour point depressant a, 10-15 parts of an inorganic nano pour point depressant b, 0.5-1.5 parts of an antioxidant and 1-3 parts of a lubricant, the preparation method comprises the following steps: adding the terpolymer, the modified ethylene-vinyl acetate copolymer, the inorganic nano pour point depressant a, the inorganic pour point depressant b, the antioxidant and the lubricant into the solvent oil, and stirring to obtain the crude oil pour point depressant. According to the crude oil pour point depressant disclosed by the invention, an efficient, stable and environment-friendly solution is provided for long-distance wax-bearing crude oil pipeline transportation through nano hybridization, multi-component synergy and the like.

The invention relates to the technical field of insulating oil, and particularly discloses antioxidant insulating oil as well as a preparation method and application thereof. The antioxidant insulating oil provided by the invention comprises synthetic oil, a composite antioxidant and a pour point depressant, the composite antioxidant is prepared from the following components in parts by weight according to the weight of the composite antioxidant: 15 to 25 parts of N-phenyl-1-naphthylamine, 25 to 40 parts of antioxidant 5057, 15 to 25 parts of 3-diisobutoxy thiophosphoryl thio-2-methyl-propionic acid and 10 to 15 parts of tetraethylene glycol dimethyl ether trihydrate; the invention also provides a preparation method of the antioxidant insulating oil. The antioxidant insulating oil provided by the invention not only has good insulativity and heat dissipation performance, but also has excellent oxidation resistance, and can meet the use requirements in a long-time high-temperature electric field environment when being used for a motor of an electric motorcycle.

The invention relates to the technical field of lubrication of gearboxes of wind generating sets, in particular to lubricating oil for a yaw variable-pitch speed reducer of a wind generating set and a preparation method of the lubricating oil. The lubricating oil is prepared from 49 to 53 parts of metallocene poly-alpha olefin, 23 to 28 parts of functional fluid containing a low-viscosity and low-volatility poly-alpha olefin base material, 15 to 20 parts of alkyl naphthalene, 2.5 to 3.0 parts of a composite additive bag, 2 to 5 parts of an oiliness agent, 0.005 to 0.01 part of a demulsifying agent, 0.02 to 0.03 part of a de-foaming agent and 0.005 to 0.01 part of a pour point depressant. The lubricating oil for the yaw variable-pitch speed reducer of the wind generating set has excellent high and low temperature performance, oxidation resistance, additive sensitivity and foam stability; in addition, the transmission energy efficiency is higher, and the excellent energy-saving effect is achieved.

A C16 alkane composition containing at least 90 wt. % C16 alkanes and having a 100 °C kinematic viscosity from 0.9 to 1.5 cSt, a 40 °C kinematic viscosity from 2 to 3.6 cSt, and a flash point from 115 to 140 °C and / or a pour point from -60 to -30 °C. A C24 alkane composition containing at least 90 wt. % C24 alkanes and having a 100 °C kinematic viscosity from 2 to 3 cSt, a 40 °C kinematic viscosity from 7.7 to 9.7 cSt, and a flash point from 185 to 215 °C and / or a pour point from -95 to -70 °C. An alkane composition containing from 5 to 95 wt. % C16 alkanes and from 95 to 5 wt. % C24 alkanes, based on a total weight of the C16 alkanes and the C24 alkanes.

A refrigeration system is provided with: a refrigerant circuit in which a refrigerant circulates through a compressor, a condenser capable of exchanging heat with air or water, a throttle element, a filter element, and an evaporator in this order; the temperature detection part is configured to detect the temperature of the refrigerant between the throttling element and the filtering element and output an adjustment trigger signal when the detection value is below a first preset value; the control section is configured to perform adjustment control when the temperature detection section outputs the adjustment trigger signal: estimate a temperature difference between the detection value and a critical predetermined value; an increment adjustment coefficient is searched in a preset data table according to the temperature difference; the opening degree of the throttling element is increased based on the increment adjusting coefficient; wherein the first preset value is higher than the pour point of the refrigerating machine oil, and the critical preset value is not lower than the pour point of the refrigerating machine oil. Oil blockage can be prevented.

The invention belongs to the technical field of hydraulic oil preparation, and particularly relates to anti-wear hydraulic oil and a production process thereof. The anti-wear hydraulic oil is prepared from the following raw materials in percentage by mass: 2 to 2.2 percent of an anti-wear complexing agent, 0.002 to 0.003 percent of a demulsifying agent, 0.001 to 0.0015 percent of an anti-foaming agent, 0.03 to 0.04 percent of an anti-rust agent, 0.1 to 0.3 percent of a pour point depressant, 0.3 to 0.5 percent of a dispersing agent and the balance of base oil. According to the anti-wear hydraulic oil disclosed by the invention, a mixture of 500N II type base oil, 100N III type base oil, CTL 4 base oil and trimethylolpropane trioleate is used as base oil, and an anti-wear complexing agent, a demulsifier, an anti-foaming agent, an anti-rust agent, a pour point depressant and a dispersing agent are added into the base oil; the prepared anti-wear hydraulic oil is ensured to have excellent extreme pressure property, thermal oxidation stability and wear resistance.

The invention discloses an anti-rust lubricant as well as a preparation method and application thereof. The lubricant comprises the following components in parts by mass: 10-60 parts of base oil; 0.001 to 1 part of graphene; 0.1-3 parts of a dispersant; 0.1-3 parts of a pour point depressant; 0.1 to 1 part of a viscosity index improver; 0.1-3 parts of a corrosion inhibitor; 0.1-1 part of an antirust additive; 0.1 to 1 part of an antioxidant additive; and 27 to 89.4 parts of water. The lubricant has excellent anti-rust, anti-oxidation, lubricity and antibacterial properties. When being applied to medical instruments, the lubricating oil can effectively lubricate the surfaces and joint parts of the metal medical instruments, reduce the roughness of the joints of the instruments, improve the friction pair bearing capacity of the instruments, prevent the medical instruments from rusting too fast and prolong the service life of the medical instruments. The preparation method is simple, low in cost and suitable for industrial production.

The invention provides a non-asphalt-based self-adhesive and a pre-laid waterproof coiled material and application thereof. The non-asphalt-based self-adhesive glue is prepared from the following raw materials in parts by weight: 120 to 150 parts of environment-friendly softening oil, 50 to 100 parts of petroleum resin, 15 to 35 parts of SBS elastomer resin, 25 to 35 parts of butadiene styrene rubber, 10 to 18 parts of high-temperature modified wax, 5 to 15 parts of density regulator, 5 to 10 parts of pour point depressant and 35 to 40 parts of inorganic filler. The pre-paved waterproof coiled material comprises a sand layer, a first adhesive layer, a reinforced tire base layer, a second adhesive layer and an anti-sticking layer which are arranged in sequence. According to the non-asphalt-based self-adhesive glue provided by the invention, a high-performance non-asphalt-based self-adhesive lap joint pre-paved anti-adhesive waterproof coiled material can be obtained, and compared with an asphalt pre-paved waterproof coiled material, the non-asphalt-based self-adhesive lap joint pre-paved anti-adhesive waterproof coiled material has the characteristics of being more environment-friendly, more durable, better in adhesion and better in waterproof effect; compared with the existing high-molecular pre-paved waterproof coiled material, the high-molecular pre-paved waterproof coiled material has the characteristics of lower cost, higher manufacturing efficiency, better fitness, excellent comprehensive performance and the like.

The invention discloses a vinyl copolymer pour point depressant as well as a preparation method and application thereof, and relates to the technical field of vinyl copolymer pour point depressants. Acrylamide, a methacrylate compound, a fumaric acid compound and alkyl coupling agent modified nano silicon dioxide are used as monomers, and the prepared copolymer pour point depressant has the characteristics and characteristic chemical bonds of copolymer macromolecules; due to the specific molecular chain and structure of the copolymer, the flexibility and flexibility variation range of copolymer molecules in the presence of dissolution or a solution is extremely large, crude oil can be quickly and effectively dispersed, the fluidity of the crude oil can be enhanced, blockage is reduced, and the oil production amount is increased; and the condensation point and the viscosity of crude oil can be obviously reduced under the condition of a very small amount (such as 500ppm).

An alcohol-resistant low-viscosity lubricating oil composition and the use thereof. The components of the lubricating oil composition include: 0.6-1.0% of a metal detergent, 6.0-10.0% of an ashless dispersant, 0.5-2.0% of an antioxidant anti-wear agent, 1.0-2.0% of a metal deactivator, 0.2-1.0% of an extreme-pressure anti-wear agent, 3.0-5.0% of a viscosity index improver, 0.1-0.2% of a pour point depressant, 0.001-0.010% of an anti-foaming agent, and 30.0-50.0% of a CTL base oil, the balance being an API group III base oil. The lubricating oil composition has good wear-resistant durability and low-temperature cold start performance.

A C16 alkane composition containing at least 90 wt. % C16 alkanes and having a 100° C. kinematic viscosity from 0.9 to 1.5 cSt, a 40° C. kinematic viscosity from 2 to 3.6 cSt, and a flash point from 115 to 140° C. and / or a pour point from −60 to −30° C. A C24 alkane composition containing at least 90 wt. % C24 alkanes and having a 100° C. kinematic viscosity from 2 to 3 cSt, a 40° C. kinematic viscosity from 7.7 to 9.7 cSt, and a flash point from 185 to 215° C. and / or a pour point from −95 to −70° C. An alkane composition containing from 5 to 95 wt. % C16 alkanes and from 95 to 5 wt. % C24 alkanes, based on a total weight of the C16 alkanes and the C24 alkanes.

The present invention provides a catalyst grading method, which includes a catalytic reaction unit; in the catalytic reaction unit, along the material flow direction, the total acid content of the catalyst increases first and then decreases; the molar content ratio of the Brönsted acid in the catalyst increases first and then decreases; in the logistics direction, the catalytic reaction unit sequentially includes an adjacent first catalyst layer and a second catalyst layer, in the first catalyst layer, the content of weak acid is greater than the content of medium-strong acid; in the second catalyst layer, the content of weak acid is less than the content of medium-strong acid. The catalyst grading method of the present invention can improve the catalytic effect by grading the catalyst, thereby improving the yield of the base oil, improving the viscosity index of the base oil, and reducing the pour point and cloud point of the base oil.

The invention relates to a micro-fluidic chip pour point depressant intelligent screening and optimizing device and method integrating multi-parameter detection, and the micro-fluidic chip pour point depressant intelligent screening and optimizing device integrating multi-parameter detection comprises an experiment module, a data acquisition module and a data analysis and control module, the experimental module comprises a power area, a conveying area, a temperature control area, an imaging area and a recovery area, the imaging area comprises a polarizing microscope and a micro-fluidic chip, the micro-fluidic chip comprises a sample introduction channel, a storage chamber, a micro-mixing chamber, a wax precipitation chamber and a temperature control system, and the micro-mixing chamber realizes efficient mixing of a pour point depressant and crude oil; the wax precipitation chamber simulates the complex flow state environment of a real oil pipeline, a wax crystal morphology observation area, a wax crystal motion behavior observation area and a wax crystal dynamic behavior observation area are arranged, the wax crystal flow state is observed, and wax crystal dynamic parameters are collected; through dynamic time sequence modeling of LSTM and strategy gradient optimization of PPO, efficient dynamic adjustment of a pour point depressant formula is realized.

The invention provides a gas engine lubricating oil composition and a preparation method thereof. The gas engine lubricating oil composition of the present invention comprises: (A) an alkyl phosphate compound; (B) alkylated diphenylamine; (C) a polyisobutylene succinic acid pentaerythritol ester dispersing agent; (D) a salicylate and / or sulfonate; (E) zinc dialkyl dithiophosphate; (F) an oil-soluble organic molybdenum friction modifier; (G) a metal corrosion inhibitor; (H) a pour point depressant; (I) a major amount of a lubricating base oil. The gas engine lubricating oil composition disclosed by the invention has excellent high-temperature oxidation resistance, cleaning performance, extreme pressure anti-wear performance and anti-corrosion performance.

The invention provides a hydroisomerization catalyst and a preparation method and application thereof, the hydroisomerization catalyst comprises a carrier and active metal loaded on the carrier, and the carrier comprises a composite molecular sieve; the composite molecular sieve comprises an inner core and a shell, the outer surface of the inner core is coated with the shell, and the mass ratio of the shell to the inner core is 1: (1-10); the inner core comprises ZSM series molecular sieves and / or SAPO series molecular sieves, and the shell comprises ZSM series molecular sieves and / or SAPO series molecular sieves. The hydroisomerization catalyst is a bifunctional catalyst, the active metal can provide a metal site for hydrogenation dehydrogenation, and the composite molecular sieve can provide an acid site for isomerization reaction, so that the Fischer-Tropsch heavy wax (higher than 580 DEG C) shows higher conversion rate and yield during hydroisomerization; and the prepared lubricant base oil is relatively low in pour point, relatively high in viscosity and excellent in oxidation stability.

The invention provides a pour point depressant as well as a preparation method and application thereof. The pour point depressant comprises a polymer with a structure as shown in a formula I. The preparation method of the pour point depressant comprises the following steps: (1) mixing alpha-olefin, maleic anhydride, an initiator and a solvent, and polymerizing to obtain a reaction system containing an intermediate product; and (2) adding long-chain fatty alcohol and / or long-chain fatty amine, monohydroxyl-terminated silicone oil and a catalyst into the reaction system obtained in the step (1), and reacting to obtain the pour point depressant. According to the present invention, the structure of the polymer represented by the formula I is designed to obtain the polymer represented by the formula I with excellent performance, and the pour point depressant prepared from the polymer represented by the formula I has a low condensation point.