153results about How to "Low kinematic viscosity" patented technology

The invention relates to extra-high voltage transformer oil and a production process thereof. The extra-high voltage transformer oil comprises the following components in percentage by weight: 75wt%-85wt% of naphthenic-base base oil, 12wt%-22wt% of dodecyl benzene, 10ppm-200ppm of a metal de-activating agent and 0.1wt%-3wt% of a light stabilizer. Compared with the prior art, the extra-high voltage transformer oil is low in cost, simple in formula and production process, convenient to use, excellent in comprehensive performances and in particular suitable for being used as extra-high voltage transformer oil.

The invention provides a screw air compressor oil composition. The screw air compressor oil composition comprises the following components in percentage by weight: 75wt%-94wt% of synthetic hydrocarbon base oil, 5wt%-20wt% of synthetic ester base oil and 1wt%-5wt% of functional additives, wherein the functional additives include one or more of an anti-wear agent, a metal deactivator, a rust inhibitor, an antioxidant, a pour point depressant, a demulsifying agent, an anti-foaming agent and an acid scavenger. By taking mixed hydrocarbon oil of the synthetic hydrocarbon base oil and the synthetic ester base oil as the base oil and simultaneously adding functional additives, the obtained screw air compressor oil composition is not easily oxidized and degraded in a use process, and the changes of the dynamic viscosity and the acid value are relatively small, so that the corrosion to units of an air compressor can be reduced, and the safe operation of the screw air compressor is guaranteed.

The invention discloses transformer oil with excellent cooling heat-radiating and moisture preventing properties. The transformer oil is mainly prepared from the following raw materials: hydrogenated stock oil, naphthene thickened oil, an antioxidant and a metal passivator, wherein the ratio of the hydrogenated stock oil to the naphthene thickened oil is (72-82):(18-28) in terms of parts by weight, the amount of the used antioxidant accounts for 0.3-0.5% relative to the total mass of the hydrogenated stock oil and the naphthene thickened oil, and the amount of the used metal pasivator accounts for 0.1-0.2% relative to the total mass of the hydrogenated stock oil and the naphthene thickened oil. The invention further discloses a preparation method of the transformer oil. The transformer oil has excellent cooling heat-radiating and moisture preventing properties, thus being very suitable for being used in southern areas of China.

A process may include contacting an olefin monomer and a racemic bridged metallocene catalyst at a temperature of 80° C. to 150° C. in the presence of hydrogen. The racemic bridged metallocene catalyst may include a metallocene compound (A) and an activator component (B). The process may include recovering an effluent containing polyalpha-olefins (PAOs). The metallocene compound (A) may be represented by the formula R(Cp₁)(Cp₂)MX₁X₂. In the formula, R may be a C₁-C₂₀ alkylene bridging group; Cp₁ and Cp₂ may be the same or different substituted or unsubstituted tetrahydroindenyl rings; M may be a transition metal; and X₁ and X₂ may be independently selected from hydrogen, halogen, hydride radicals, hydrocarbyl radicals, substituted hydrocarbyl radicals, halocarbyl radicals, substituted halocarbyl radicals, silylcarbyl radicals, substituted silylcarbyl radicals, germlcarbyl radicals, substituted germylcarbyl radicals.

The present invention relates to a process for the partial upgrading of properties of heavy and/or extra-heavy crude oil by low severity catalytic hydrotreatment in only one reaction step. The process of the present invention is obtained upgraded oil with properties required for its transportation from offshore platforms either to maritime terminal or to refining centers. The process reduces the viscosity of heavy and/or extra-heavy crude oil, and decreases the concentration of impurities, such as sulfur, nitrogen, and metals, in such a way that heavy and/or extra-heavy crude oils can be transported to maritime terminals or to refining centers. The process increases the lifetime of the catalyst and decreased operating costs by reducing consumption of utilities because the operation of the process is carried out at lower severity. The partially upgraded oils obtained in this process can be transported directly to the maritime terminals or to existing refineries.

The invention relates to compositions comprising a blend of Group II basestocks and low volatility, low viscosity PAO basestocks. The blend is particularly useful for preparing finished lubricants that meet or even exceed the criteria for SAE Grade 0W multi-grade engine oils. The combination of these low volatility, low viscosity PAOs with Group II basestocks provide, in embodiments, the necessary performance criteria in automatic transmission fluids, automotive or industrial gear oils, hydraulic fluids, or any other high performance lubricant requiring a combination of excellent low fluidity and low volatility.

The invention relates to a preparation method for a polyester fiber with compound ultraviolet ray resisting, aging resisting, moisture absorbing and quick drying functions. The method comprises an esterification reaction process, a polymerization reaction process and a spinning process in sequence, and comprises the following specific steps of: in an esterification reaction, introducing a third monomer with relatively large steric hindrance; after the esterification reaction and before a pre-polymerization reaction, adding titanium dioxide serving as a high-content delustering agent, a hindered amine light stabilizer and a hindered phenol antioxidant; after the pre-polymerization of polymerization reaction process and before final polymerization, adding an ultraviolet absorber; and beforethe spinning process, pre-crystallizing and drying polyester slices obtained in the polymerization reaction process, and designing a special-shaped section for the fiber. The polyester fiber obtainedby using the method has superior ultraviolet ray resisting, aging resisting, moisture absorbing and quick drying functions. As provided by testing, relevant technical indexes are that: the ultraviolet transmission is less than or equal to 5.0 percent, the wicking height is more than or equal to 120 millimeters, and the evaporation rate is more than or equal to 0.20g/hr after the polyester fiber is woven into a knitted fabric and a woven fabric.

The invention relates to concentrated emulsified diesel fuel and a preparation method thereof, wherein the concentrated emulsified diesel fuel is long in shelf life and low in cost and is prepared by the following raw materials by weight parts: 50-80 of diesel, 0.5-1 of cyclohexylamine, 0.5-2 of ethanolamine, 0.03-0.08 of water and hydrazine, 8-17 of oleic acid or fatty acid, 0.01-0.08 of ferrocene, 0.1-1 of isooctyl nitrate or amyl nitrate, 5-10 of ethanol, 4-15 of solvent oil and 10-30 of water. The concentrated emulsified diesel fuel is long in service life which is 6 years, has no emulsion breaking, is good in stability, can be used directly, also can be used by being mixed with national-standard diesel in any proportion, and further has the advantages of being simple in production process, easy to control, low in sulphur content and good in flowability, and the quality of the diesel is free of influence caused by secondary water adding.

The invention relates to a method for preparing a high-comfortable composite functional polyester fiber, comprising the steps of: first esterification reaction section, secondary esterification reaction section, polymerization reaction process and spinning process, wherein aliphatic dicarboxylic acid and/or non-centrosymmetrically aromatic dicarboxylic acid is led into the first esterification reaction section to serve as a third monomer; flexible polyethylene glycol is led into the secondary esterification reaction section to serve as a fourth monomer; after finishing the esterification reactions, hindered amine light stabilizer and hindered phenolic antioxidant which are respectively prepared by taking acetic acid and ethylene glycol as solvents and hydroxyl silicone oil are added; after finishing pre-polymerization and before final polymerization of the polymerization reaction process, ultraviolet light absorber and antistatic agent are added; and before finishing the spinning process, polyester slices are performed pre-crystallization and drying; fibers with odd-shaped cross sections of three-leaf, cross, five-leaf and the like are prepared by melt spinning. The obtained polyester fiber is anti-ultraviolet light, antistatic, anti-pilling and has wet-absorbing quick-drying performance; and the fabric has high comfort.

The invention relates to a preparation method for a polyester fiber with a composite ultraviolet, static electricity and pilling resisting function. The preparation method comprises an esterification reaction procedure, a polymerization reaction procedure and a spinning procedure. The esterification reaction procedure comprises a primary esterification reaction stage and a secondary esterification reaction stage, flexible polyethylene glycol is introduced as a third monomer in the secondary esterification reaction stage, and after esterification is finished, a hindered amine light stabilizer,a hindered phenol anti-oxidant and hydroxyl silicone oil are added, wherein the hindered amine light stabilizer and the hindered phenol anti-oxidant are prepared by taking an acetic acid and ethyleneglycol as solvents. In the polymerization reaction procedure, after prepolymerization and before final polymerization, an ultraviolet absorbent and an antistatic agent are added. Before the spinning procedure, polyester is sliced for pre-crystallization and drying. The polyester fiber obtained by the method has the outstanding ultraviolet, static electricity and pilling resisting functions, and after being woven into knitted machine-made fabrics, is tested to have related technical indexes comprising the ultraviolet light transmittance of less than or equal to 5.0%, the pilling resistance of more than or equal to level 4 and the fiber volume specific resistance of less than or equal to 10*10<10> ohm.cm.

The invention belongs to the technical field of insulating oil for power transformers with high overload capacity, and particularly relates to high-overload transformer oil and a preparation process thereof. The high-overload transformer oil is prepared from natural ester insulating oil and mineral insulating oil according to the volume percentage of (40%-50%):(60%-43%). The preparation process comprises the following steps: firstly, heating the natural ester insulating oil to 80 to 95 DEG C under a vacuum stirring condition; then under a vacuum condition, adding the mineral insulating oil into the natural ester insulating oil, and carrying out mechanical stirring and then ultrasonic oscillation; finally, carrying out two-stage vacuum filtering treatment on treated transformer oil, wherein the closed-cup flash point of a treated oil product is greater than or equal to 155 DEG C. The transformer oil disclosed by the invention is high in physical, chemical and electrical properties, low in kinematic viscosity, high in flowability and long in service life; the transformer with high overload capacity is high in overload capacity; faults of the transformer are reduced, and the problem of 'load returning' is effectively solved; the safety stability of the transformer is improved; the high-overload transformer oil has a high popularization and application value.

The invention discloses an oil phase composition for preparing droplet digital PCR liquid drops. The oil phase composition comprises main constituents and surfactants. The main constituents include mineral oil and alkane, and the surfactants include EM90 and TritonX-100, wherein the alkane is one of 12-16 alkane or a mixture of 12-16 alkane. Fluorinated oil is replaced by mineral oil, and the oil phase composition has the advantages that the oil phase composition is nonpolar, insoluble in water, not prone to volatilization, stable in property and free of inhibiting effect on PCR amplification, and the kinematic viscosity of light oil is low; meanwhile, kinematic viscosity is further reduced by adding proper alkane, then the proper surfactants EM90 and TritonX-100 are added, and finally, the oil phase composition is used for preparing liquid drops. The obtained liquid drops have the advantages that sizes are uniform, thermal stability is high, volatilization and foam generation do not occur easily, and amplification inhibition is avoided.

The invention relates to a hydraulic oil composition and uses thereof, mainly solves the problems that in the prior art, HM anti-wear hydraulic oil is poor in low temperature performance, and cannot meet the requirements of low temperature operation equipment. The hydraulic oil composition comprises the following components: by weight, a) 100 parts of mineral base oil; and b) 0.1-2 parts of an anti-wear hydraulic oil compound agent; wherein the characteristics of the mineral base oil are that: a1) the kinematic viscosity at 40 DEG C is 28.8-35.2mm<2> / s; a2) the pour point is below -30 DEG C; a3) the viscosity index is higher than 100; a4) the sulfur content is less than or equal to 0.03 wt.%; a5) the nitrogen content is less than or equal to 0.005 wt.%; the anti-wear hydraulic oil compound agent is selected from at least one from HiTEC521 and HiTEC543 of AFTON corporation, LZ5703 of LUBRIZOL corporation, OLA4994 of CHEVRON corporation, and IR5010 of BASF corporation, and the technical scheme well solves the problems, and can be used in industrial production of low pour point anti-wear hydraulic oil.

The invention provides polysucrose fatty acid ester which is characterized by comprising or being prepared from sucrose, dicarboxylic acid and fatty acid at a mole ratio of 1:(1-1.5):(1-2). Due to the rich vacancy-OH, the polysucrose fatty acid ester provided by the invention can be effectively adhered to surfaces of processed metals, is excellent in lubrication property, extreme pressure antiwear property and rusting resistance, and can completely or partially replace conventional extreme pressure antiwear agents used in micro-scale lubricating oil, and only the micro-scale lubricating oil can meet the requirements of lubrication cooling, extreme pressure antiwear property and rusting resistance in metal processing, and when the polysucrose fatty acid ester is used with a micro-scale lubricating device, the use amount of cutting fluid can be reduced by more than 95%, and remarkable effects of energy conservation, emission reduction and environmental protection can be achieved.

The invention provides a hydraulic oil composition with low viscosity and low solidifying point, which comprises the following ingredients by weight percentage: 0.01-1% of neutral dinonyl naphthalene sulfonic acid barium, 0.1-1.5% of 2,6-di-tert-butyl p-cresol, 5-25% of polymethacrylate and 72-95% of deeply hydrodearomatized base oil. The hydraulic oil composition with low viscosity and low solidifying point has excellent low temperature performance which comprises low pour point and low kinematic viscosity. Without adding a pour point depressant, the pour point is -76 DEG C (GB/T 1995), the kinematic viscosity at the temperature of -40 DEG C is 367 mm<2>/s, and the kinematic viscosity at the temperature of 40 DEG C is 12.47 mm<2>/s (GB/T 265). Besides the excellent low temperature performance, the hydraulic oil composition has antioxidant and antirust functions and can used for various hydraulic equipments in severe cold regions, the hydraulic oil composition has the advantages of reasonable raw materials compatibility, simple preparation method and wide application scope.

Provided in a fuel additive for heavy oil, made using a composition comprising: an oil-soluble metallic compound containing any one metal selected from calcium, barium, manganese, and iron; alcohol; hydrotreated light distillate; paraffin (kerosene); mineral oil; and a nonionic surfactant. The fuel additive for heavy oil, when added in a small amount to a heavy oil, can lower the kinematic viscosity and the flash point of the heavy oil, minimize the occurrence of a residual carbon fraction, dust, a sulfur fraction, or the like, increase the caloric value of the heavy oil, and improve the combustion efficiency during the combustion of the heavy oil.

The invention provides special modified cold-mixing asphalt for cold-region normal-temperature mixing-type asphalt concrete, which comprises linear liquid SBS, heavy traffic asphalt, surfactant, organic additives and water. The weight percentages of the components are: 50 to 70 percent of heavy traffic asphalt, 2.5 to 15 percent of linear liquid SBS, 1.2 to 11 percent of cationic surfactant, 3 to 6 percent of organic additives, and 20 to 30 percent of water. The water and the cationic surfactant are mixed pro rata and then are fully mixed through an emulsifier to form soap liquid; the heavy traffic asphalt is heated to between 100 and 170 DEG C; the soap liquid is heated to between 45 and 80 DEG C; the heavy traffic asphalt, the soap liquid, the linear liquid SBS and the organic additives are rapidly mixed in a mixing-melting device; and a uniform stable suspended substance is formed through a grinding machine, fully stirred, cooled to normal temperature and stored, thus the asphalt can be obtained. The problem that cold-mixing asphalt is too fast to demulsify, unstable in performance, short in storage time and poor in regional adaptability is solved. Evaporation residue of the asphalt mixture can greatly improve pavement performance. In addition, the asphalt has the advantages of simple process, stable performance and wide use.

The invention discloses a nanometer lubricant for a drilling fluid and a preparation method of the nanometer lubricant in the petroleum industry. The lubricant is added to the drilling fluid to improve the lubricity of the drilling fluid, and then the friction and the torque in the drilling process are reduced. The nanometer lubricant for the drilling fluid comprises linear alpha-olefin, nanosilicon dioxide, sulfide fatty acid ester, a surfactant and water, the preparation method comprises putting the linear alpha-olefin into a stirring kettle, controlling the temperature of the kettle to 25-30 DEG C, then proportionally adding the surfactant, stirring for 4 hours, proportionally adding the nanosilicon dioxide, stirring for 2 hours, then proportionally adding the sulfide fatty acid ester,stirring for 2 hours, proportionally adding water, controlling the water addition speed to be lower than or equal to 2 m<3>/h, and continuously stirring for 4 hours until an even water-in-oil emulsionis formed, wherein the water-in-oil emulsion is the nanometer lubricant for the drilling fluid.

A textile fabric treating fluid comprises raw materials in parts by weight as follows: 35-40 parts of glycerin, 10-12 parts of ethylenediaminetetraacetic acid disodium salt, 12-16 parts of nano activated carbon, 5-8 parts of fatty alcohol polyoxyethylene ether, 2-3 parts of isopropyl myristate, 2-3 parts of chloramphenicol palmitate and 11-17 parts of a modification preparation. The textile fabric treating fluid contains no irritant chemicals, is safe, non-toxic and low in kinematic viscosity, fabric cannot be snapped when treated with the treating fluid, and the treating fluid can remove formaldehyde and other chemical substances carried by the fabric quite effectively, can enhance the fabric elasticity, is good in self-cleaning capacity, can be used repeatedly 15-20 times and cannot react with the substances in the fabric or damage the fabric structure.

The invention relates to an industrial flue gas waste heat recovery device based on liquid metals. The industrial flue gas waste heat recovery device based on the liquid metals is characterized by comprising a softening water pump, a steam boiler, an electromagnetic pump, a heat exchanger and pipelines. According to the industrial flue gas waste heat recovery device based on the liquid metals, water is replaced by the liquid metals, and heat exchanging is conducted in the heat exchanger between the liquid metals and the high-temperature fuel gas generated by industrial production. The electromagnetic pump is taken as circulating power for the liquid metals. The liquid metals have the advantages of being excellent in physical property, low in melting point, high in boiling point, high in heat conducting coefficient, small in moving viscosity and the like, and have the good flow heat transfer capability. Due to the multiple advantages of the liquid metals, the industrial flue gas waste heat recovery device based on the liquid metals has the effects that the pressure of industrial equipment is reduced, the service life of the industrial equipment is prolonged and the using process is safe. The industrial flue gas waste heat recovery device based on the liquid metals can be widely used in the field of chemical and petrochemical industries, sulfuric acid industry, architectural material industry, metallurgical industry, industrial power generation industry and the like where the industrial waste heat such as carbon black, flue gas waste heat, chemical reaction hot high-temperature products and cooling medium waste heat is generated.