16results about How to "Improve low temperature fluidity" patented technology

The invention relates to a biodegradable hydraulic oil composition and a preparation method of hydraulic oil, and relates to the technical field of hydraulic oil compositions.The hydraulic oil composition comprises, by weight, 20-37% of ester oil, 5-10% of refined vegetable oil and 5-10% of a demulsifier, and the total weight of the ester oil, the refined vegetable oil and the demulsifier is 100%. The content of the refined vegetable oil is 62-79.9 wt%, the content of the demulsifier is 0.1-1 wt%, and the preparation method of the refined vegetable oil comprises the following steps: pre-loading a nanocapsule with an antioxidant as an inner core in activated clay, loading the activated clay pre-loaded with the nanocapsule into deacidified oil, and filtering to obtain the refined vegetable oil. The hydraulic oil composition disclosed by the invention has excellent biodegradability and also has the technical effects of relatively good oxidation stability and viscosity-temperature property.

This invention discloses a long-life pavement material for extreme and complex conditions and its preparation method. Modified asphalt pavement material is prepared using ultra-deeply decrosslinked rubber as the main raw material (with a content greater than 50%). Through specific processes and formulations, this pavement material retains excellent self-healing properties even under extreme low-temperature conditions (< -10 °C), with a healing efficiency greater than 50%, and a healing efficiency greater than 30% after aging, resulting in a long service life. This invention not only solves the problem of easy cracking in asphalt pavements and significantly improves their service life, but also enables the high-value resource utilization of waste rubber, resulting in significant environmental and economic benefits.

The invention provides a random polymerized metallocene compound as well as a preparation method and application thereof. The random polymerized metallocene compound has a structure as shown in a formula I, wherein R is selected from H, benzene and derivatives thereof; x is selected from halogen, C1-C30 alkyl groups and derivatives thereof, C1-C6 alkoxy groups and derivatives thereof, C2-C30 dialkyl amino groups and derivatives thereof, and C2-C10 alkenyl groups and derivatives thereof; m is a transition metal element. The random polymerized metallocene compound is high in catalytic activity and is used for preparing high-viscosity mPAO base oil, and the prepared product has excellent low-temperature flowing property.

This application relates to the field of refrigeration systems, disclosing a refrigeration oil, a working fluid composition for refrigeration machines, and a refrigeration system. By adding a specific type of surfactant, this application significantly reduces the surface tension of the refrigeration oil, improves its compatibility with refrigerants such as hydrofluorocarbons, and reduces oil film formation or oil residue in the refrigeration system. The refrigeration oil described in this application has suitable viscosity and solubility viscosity, meeting the normal operating requirements of the compressor, while also effectively inhibiting the formation of oil film on the heat exchanger surface, thereby improving heat exchange efficiency. Furthermore, this refrigeration oil has good lubricity, low-temperature fluidity, and thermochemical stability, which can promote the circulation of the refrigeration oil in the refrigeration system pipeline, improve oil return efficiency, and extend the compressor's service life.

The application discloses a kind of high antioxidation composite ester insulating oil and synthesis method thereof, it is related to synthetic ester insulating oil technical field.The synthesis method includes the following steps: with neopentyl glycol and gallic acid as reactant under the action of catalyst, first esterification reaction is carried out, and intermediate is obtained;With the intermediate, n-octanoic acid and n-decanoic acid as reactant under the action of catalyst, vacuum esterification reaction is carried out, and the high antioxidation composite ester insulating oil is obtained.The product prepared by specific step-by-step reaction process and raw material selection in the application, while realizing very low viscosity (40 ℃ kinematic viscosity is as low as 8.16 mm 2 s ‑1 )Simultaneously, very high initial oxidation temperature (as high as 272.8 ℃) and very low dielectric loss (as low as 0.0026) are obtained, and the "low viscosity-high antioxidation-low dielectric loss" is realized.

The application relates to the technical field of lubricating oil, and particularly discloses a high-temperature-resistant and high-friction-reducing lubricating oil and a preparation method thereof. The lubricating oil comprises the following components: 35-45 parts of poly-alpha-olefin, 10-15 parts of methyl ricinoleate, 20-30 parts of pentaerythritol tetraoleate, 15-20 parts of hydrogenated base oil, 0.1-0.2 parts of modified graphene oxide, 0.8-1.5 parts of extreme-pressure anti-wear agent, 0.5-1 part of detergent, 0.3-0.5 part of antioxidant, 0.2-0.3 part of dispersant, 0.5-0.8 part of viscosity index improver, 0.1-0.2 part of rust inhibitor and 0.01-0.05 part of antifoaming agent. The application realizes cost reduction and emission reduction by compounding multiple base oils, guaranteeing the stability of the system through multi-component synergy and replacing part of the base oil with plant-based base oil. The modified graphene oxide significantly reduces wear through physical friction reduction and chemical anti-wear synergy, quickly discharges accumulated heat and prolongs the service life at high temperature.

The application relates to the field of lubricating oil, and more particularly to a novel wind power gear oil compound and a preparation method thereof. The novel wind power gear oil compound comprises, in mass parts, at least the following raw materials: a base agent 60-80 parts, an oily agent 1-8 parts, an antioxidant 3-6 parts, an anti-wear agent 3-8 parts and an improver 4-10 parts. The application provides a novel wind power gear oil compound which can be directly used as a wind power gear lubricating oil or used as an additive of other lubricating oil systems, can effectively enhance the extreme pressure resistance, corrosion and rust resistance, low-temperature flow and stability of the lubricating oil under the guarantee of excellent lubricating wear resistance and weather resistance and aging resistance of the lubricating oil, and meets the performance requirements of more complex wind power speed-up gear boxes.

This invention provides a dual-support hydrocracking catalyst, its preparation method, and its application. The dual-support hydrocracking catalyst comprises a composite support and an active metal. The composite support is composed of USY molecular sieve and MCM-41 mesoporous molecular sieve. The active metal comprises at least two transition metal elements. The mass ratio of the composite support to the active metal is (2~5):1; the mass ratio of the USY molecular sieve to the MCM-41 mesoporous molecular sieve is (0.5~2):1. The supported hydrocracking catalyst provided by this invention constructs a microporous-mesoporous synergistic pore structure, balancing activity and stability. By using a dual support composed of USY and MCM-41 in a specific ratio, the strong acidity and high shape selectivity of USY molecular sieve are retained, while the mesoporous structure of MCM-41 solves the problem of limited diffusion of macromolecular raw materials, significantly improving the catalyst's carbon-holding capacity and significantly improving its resistance to colloids and carbon deposition.

The invention relates to the technical field of catalysis, and discloses application of a Cu-ZSM-22 catalyst in preparation of aviation kerosene components through hydrodeoxygenation coupling isomerization of methyl palmitate, and the application comprises the following steps: 1) carrying out reduction treatment on the Cu-ZSM-22 catalyst; 2) filling a reactor with the Cu-ZSM-22 catalyst, mixing methyl palmitate and a solvent, introducing hydrogen, and carrying out hydrodeoxygenation and hydroisomerization reaction to obtain a product containing hexadecane and an isocompound thereof; according to the Cu-ZSM-22 catalyst, a ZSM-22 molecular sieve is used as a carrier, and a copper species is used as an active component. The catalyst is used for preparing aviation kerosene components through methyl palmitate hydrodeoxygenation coupling isomerization, has the advantages of being low in cost, high in methyl palmitate conversion rate, high in long-chain alkane selectivity, high in product isomerization ratio and the like, and can effectively improve the low-temperature fluidity of the aviation kerosene components.

The present application relates to a kind of collector for spodumene and its preparation method and flotation method, specifically to the field of flotation reagent technology, the collector includes: castor oil acid salt, potassium lauryl polyether phosphate, laurylimino diacetic acid disodium, phosphate betaine, alcohol ether, caustic alkali and solvent.The collector provided in the present application, by the synergistic adsorption of carboxylate of castor oil acid salt and phosphate ester group of potassium lauryl polyether phosphate and phosphate betaine to activated spodumene realizes strong collection, and by imino diacetate and phosphate betaine structure regulation selectivity, dispersibility and foam property, so as to improve the flotation separation effect of spodumene and quartz, feldspar, mica and other gangue minerals.

The present application belongs to the technical field of temperature control, and particularly relates to a temperature control liquid for coal-based Fischer-Tropsch synthesis hydrocarbon as well as a preparation method and application thereof. The temperature control liquid mainly comprises coal-based Fischer-Tropsch synthesis hydrocarbon, or the temperature control liquid mainly comprises coal-based Fischer-Tropsch synthesis hydrocarbon and liquid polyolefin. The distillation range of the coal-based Fischer-Tropsch synthesis hydrocarbon is less than or equal to 350 DEG C. The main component of the coal-based Fischer-Tropsch synthesis hydrocarbon is isomeric alkanes and normal alkanes with carbon number of 12-24, wherein the isomeric alkanes account for less than 90% of the total mass, and the normal alkanes account for more than 10% of the total mass. The kinematic viscosity of the coal-based Fischer-Tropsch synthesis hydrocarbon is less than or equal to 2.5 mm 2 / s at 100 DEG C, and 2.0-6.0 mm 2 / s at 40 DEG C. The kinematic viscosity of the liquid polyolefin is less than or equal to 8.0 mm 2 / s at 100 DEG C, and 2.0-20.0 mm 2 / s at 40 DEG C. The temperature control liquid has the characteristics of low density, low electrical conductivity, low kinematic viscosity and high heat conduction efficiency.

The utility model relates to the technical field of oil exploitation, in particular to a tubular anti-scale and anti-wax oil well pump which comprises a pump cylinder coupling, a pump cylinder, an anti-scale and anti-wax alloy plunger assembly, an anti-scale and anti-wax alloy standing valve assembly, an oil pipe coupling and an anti-scale and anti-wax alloy device. The pump cylinder coupling is in threaded connection with the upper end of the pump cylinder; an anti-scale and anti-wax alloy plunger assembly is arranged in the pump cylinder; the anti-scale and anti-wax alloy standing valve assembly is mounted at the lower end of the pump cylinder; and the tubing coupling is respectively connected with the lower end of the anti-scale and anti-wax alloy standing valve assembly and the anti-scale and anti-wax alloy device. Due to the design of the anti-scale and anti-wax alloy assembly, the contact area between the anti-scale and anti-wax alloy and oil liquid is increased, the oil liquid and the anti-scale and anti-wax alloy can make more sufficient contact and catalysis, formation of new scales can be prevented, and dissolution of old scales is promoted. The wax crystal form is changed by utilizing the conductivity and the surface catalytic characteristic of the anti-scale and anti-wax alloy, so that the freezing point is greatly reduced, and the anti-wax effect in the lifting process is achieved.

This application relates to the field of capacitor technology, specifically disclosing an environmentally friendly capacitor insulating oil and its preparation method. The environmentally friendly capacitor insulating oil comprises polyol esters and hydroxyl acrylates, wherein the molar ratio of hydroxyl groups in the polyol esters to those in the hydroxyl acrylates is 1–2:1–2. This application introduces small-molecule hydroxyl acrylates to reduce the intermolecular forces of the polyol esters, thereby improving the low-temperature fluidity of the insulating oil. Simultaneously, the small-molecule hydroxyl acrylates also provide free radical trapping sites, effectively improving the gas evolution performance, antioxidant stability, and electrical properties of the insulating oil under extreme low-temperature conditions. This solves the technical problem of existing insulating oils being unable to simultaneously achieve low-temperature fluidity, insulation, and environmental friendliness.

This invention discloses a BN@EVA composite pour point depressant and its preparation method, belonging to the petrochemical field. The invention improves the compatibility of nano-hexagonal boron nitride (BN) with ethylene-vinyl acetate copolymer (EVA) by hydroxylation and amination, and then uses a solvent blending method to composite BN-NH2 and EVA in xylene to prepare the BN@EVA pour point depressant. The mass fraction of BN in the composite pour point depressant is 1-3 wt%, with an optimal value of 2 wt%. When the addition amount is 500 mg / kg, the pour point of crude oil can be significantly reduced from 19℃ to -7℃, a reduction of 26℃. FT-IR and SEM characterization confirmed that BN was successfully modified and uniformly dispersed in the EVA matrix; DSC curves showed a decrease in crystallization temperature and a bimodal synergistic effect; microscopic observation showed that the wax crystal morphology changed from a dense network to a dispersed spherical shape, effectively improving low-temperature fluidity. This invention has the advantages of good pour point depressant effect, simple process, and low cost, and is suitable for the extraction and pipeline transportation of high-wax crude oil.

This invention discloses an epoxide derivative, its preparation method, and its application. The epoxide derivative has the chemical structure shown in formula (I): R-O-(EO). a -(PO) b - [(EO) c -(PO) d ] n - (EO) e -(PO) f -H (I); where R represents a C4-C32 straight-chain or branched alkyl group, and the [(EO)] c -(PO) d ] n The total block unit represents n (EO)-(PO) blocks linked together, where n ranges from 2 to 16. c and d represent the average molar number of EO and PO in the total block unit, with values ​​ranging from 1 to 10 and 1 to 2.5, respectively. a, b, e, and f each represent the average molar number, with values ​​of a and e ranging from 0 to 10, and values ​​of b and f ranging from 0 to 30. The epoxy alkyl derivatives of this invention combine low-temperature flowability, water solubility, and safety, and can be used as high-performance surfactants.

The application discloses a preparation method of biomass Fischer-Tropsch synthesis diesel oil, which comprises the following steps: converting cellulose and lignin in biomass into biomass synthesis injection powder fuel through superheated steam pressure reduction hydrothermal carbonization of wood fiber biomass raw materials; producing biomass synthesis gas through pressurized entrained flow bed high-temperature gasification of the biomass synthesis injection powder fuel, wherein the gasification agent is oxygen and water vapor, and the biomass synthesis gas is adjusted to H / C=2-3:1; and producing biomass Fischer-Tropsch synthesis diesel oil through a Fischer-Tropsch synthesis process of the biomass synthesis gas. The biomass Fischer-Tropsch synthesis diesel oil can be produced in a large scale and continuously by using the biomass synthesis injection powder fuel obtained through superheated steam pressure reduction hydrothermal carbonization of biomass.