16 results about "N-hexadecane" patented technology

This invention belongs to the field of diesel additive technology, and particularly relates to a diesel cetane number improver and its preparation process, comprising the following steps: mixing isooctyl nitrate, n-hexadecane, n-eicosane, oleic acid, and 2,6-di-tert-butyl-p-cresol to obtain a premix; mixing anhydrous ethanol, glycerol, and an emulsifier, adding the premix, reacting, and drying to obtain microparticles; mixing ethyl acetate, isopropanol, n-butanol, and an emulsifier, adding hexadecyl alcohol and EVA-210 to dissolve, to obtain a film-forming solution; mixing ethyl acetate and isopropanol, adding the microparticles and the film-forming solution, removing ethyl acetate, isopropanol, and n-butanol, adding the solution to liquid paraffin and mixing to obtain the diesel cetane number improver. The diesel cetane number improver prepared by this invention can prevent isooctyl nitrate from directly contacting the external environment, slow down the generation rate of free radicals, effectively improve and stabilize the cetane number of diesel, and maintain the cetane number of diesel at a high level for a longer period of time.

The application provides a preparation method of a porous material loaded with mixed microorganisms, comprising the following steps: S1, preparation of a mixed bacteria suspension; S2, preparation of an activated sludge porous material; and S3, preparation of a porous material loaded with mixed microorganisms. The application also provides a preparation method of an oil-wetting and water-repellent activated sludge porous material loaded with microorganisms, which comprises spraying a hydrophobic silica particle suspension on the porous material loaded with mixed microorganisms to obtain a modified material which is oil-wetting and water-repellent. The porous material loaded with mixed microorganisms and the oil-wetting and water-repellent activated sludge porous material loaded with microorganisms can effectively degrade medium and long chain alkanes in oil, especially n-hexadecane.

The invention provides a preparation method of an anti-icing and anti-frost super-lubricating surface, and belongs to the technical field of anti-icing and anti-frost of power transmission lines, and the preparation method comprises the following steps: preparing an alumina substrate of a porous structure with the pore diameter of 100-150 nm and the porosity of 60-70% by adopting an anodic oxidation method; immersing the alumina substrate into an ethanol solution of n-hexadecyl trimethoxysilane for modification to obtain a modified alumina substrate; the preparation method comprises the following steps: stirring and mixing silicone oil and n-hexadecyl trimethoxy silane to obtain modified silicone oil; the anti-icing frost-resistant super-lubricating surface is prepared from the modified silicone oil and the modified aluminum oxide substrate through a vacuum impregnation method. The preparation method of the anti-icing frost-resistant super-lubricating surface is simple, easy to implement, economical and effective, and the prepared super-lubricating surface has good anti-icing frost-resistant performance.

The present application provides a naphtha directional adsorption separation method, and relates to the technical field of petroleum chemical industry.The present application adopts a double desorption agent process flow, uses stronger adsorption force between high carbon alkanes (n-dodecane, n-tetradecane or n-hexadecane) and adsorbents, solves the problems of incomplete desorption of low carbon alkanes desorption agent and low separation yield, and thus significantly improves the separation efficiency of the process.Meanwhile, the use of low carbon alkanes (n-pentane or n-hexane) to replace high carbon alkanes on the adsorbents can avoid the residue of high carbon alkanes on the adsorbents, and affect the recycling of the adsorbents.The present application adopts the double desorption agent process flow, which can ensure high separation efficiency and improve the utilization rate of the adsorbents at the same time.The present application can efficiently separate n-alkanes in naphtha, and the separated n-alkanes can be used as high-quality cracking ethylene (propylene) raw materials;the adsorption residual oil rich in isomeric alkanes, naphthenes and aromatic hydrocarbons can be used as high-quality catalytic reforming aromatic hydrocarbon raw materials.

The invention relates to a warm-keeping spandex fabric prepared from hollow fibers and a preparation method of the warm-keeping spandex fabric. The fabric can be prepared by the following method: firstly, preparing n-hexadecane and n-octadecane / polyurethane microcapsule phase change materials; secondly, dissolving n-hexadecane and an n-octadecane / polyurethane microcapsule phase change material into a spinning solution to prepare a spinning solution; thirdly, spinning is conducted on the spinning solution, and hollow polyurethane fibers are prepared; and finally, spinning the hollow polyurethane fibers into yarns, and weaving the yarns into the warm-keeping spandex fabric. The range of the air permeability of the spandex fabric prepared by the method is between 928.1 mm / s and 956.3 mm / s, and the range of the crow value of the spandex fabric prepared by the method is between 1.03 and 1.06; therefore, the spandex fabric prepared by the method disclosed by the invention has better warm-keeping performance on the premise of not influencing the air permeability.

The invention provides a quantitative detection method for solvent electrons induced by hydrocarbon-water interface microdroplets under high-temperature and high-pressure conditions, and belongs to the technical field of in-situ analysis of electrons in mixed fluid. The quantitative detection method comprises the following steps: mixing a silicomolybdic acid stock solution, a stannous chloride solution and water to obtain a standard heteropolyblue solution, testing the absorbance under the wavelength of 973nm, and drawing a standard curve of solvent electron quantity and absorbance; respectively adding the silicomolybdic acid reaction liquid and n-hexadecane into a quartz sample bottle to construct a hydrocarbon-water interface system; and heating the sealed quartz sample bottle at constant temperature, testing the absorbance of the silicomolybdic acid reaction liquid under the wavelength of 973nm after the reaction is completed, and substituting the absorbance into the standard curve to obtain the solvent electron amount. According to the method, the electron quantitation limit can reach 0.2 mmol / L, the electron content of the solvent can be accurately measured in a wide concentration range, and a reliable tool is provided for fine research of electron behaviors in micro-interface reaction.

The invention belongs to the technical field of diesel additives, and particularly relates to a diesel cetane number improver and a preparation process thereof, and the preparation process comprises the following steps: uniformly mixing isooctyl nitrate, n-hexadecane, n-eicosane, oleic acid and 2, 6-di-tert-butyl p-cresol to obtain a premixed solution; uniformly mixing absolute ethyl alcohol, glycerol and an emulsifier, adding the premixed solution, reacting, and drying to obtain particles; uniformly mixing ethyl acetate, isopropanol, n-butyl alcohol and an emulsifier, adding hexadecanol and EVA (Ethylene Vinyl Acetate)-210, and dissolving to obtain a film forming solution; and uniformly mixing ethyl acetate and isopropanol, adding the particles and the film-forming liquid, removing ethyl acetate, isopropanol and n-butyl alcohol, adding into liquid paraffin, and uniformly mixing to obtain the diesel cetane number improver. The prepared diesel oil cetane number improver can prevent isooctyl nitrate from being in direct contact with the external environment, slow down the generation speed of free radicals, effectively improve and stabilize the cetane number of diesel oil, and enable the cetane number of the diesel oil to be maintained at a high level in a long time.

The application discloses a kind of polyethylene composite materials for hot-melt butt joint polyethylene structural wall double-flat winding pipe, belong to high polymer material technical field. Including following component: polyethylene resin 100 parts;Carbon black master batch 2~4 parts;Polydopamine coated zinc oxide nanowire 0.5~2 parts;Phase change microcapsule 0.2~1 parts;The phase change microcapsule has with phenolic resin as shell, with n-hexadecane as core material structure.The polyethylene structural wall double-flat winding pipe prepared by the synergistic effect of polydopamine coated zinc oxide nanowire and phase change microcapsule in the application is not easy to produce bubble and pore when port hot-melt butt joint, can also shorten the pipe length that needs to be cut off, reduce cooling demoulding time, improve joint tensile strength and ring stiffness, improve hot-melt welding joint quality.

The invention provides an air slow-release microbe control microsphere composite material and a preparation method thereof. The slow-release air microorganism control microsphere composite material comprises a phase change material, sodium chlorite gel microspheres, an acidifying agent, a penetrating agent and a water channel construction material, the phase change material is selected from at least one of n-hexadecane, n-octadecane, paraffin, stearic acid and palmitic acid; the penetrating agent is selected from at least one of fatty alcohol-polyoxyethylene ether, sodium sulfamate, alkylphenol polyoxyethylene ether and sulfated castor oil; the water channel construction material comprises sodium bicarbonate, cellulose and magnesium sulfate. The slow-release air microorganism control microsphere composite material provided by the invention is moderate in speed of releasing chlorine dioxide in air, so that overlarge concentration of chlorine dioxide in air is avoided, and meanwhile, the slow-release air microorganism control microsphere composite material is long in chlorine dioxide release period, and a disinfectant does not need to be frequently replaced.

The invention belongs to the technical field of high polymer materials and microcapsules, and provides a continuous microcapsule film forming system and a preparation method of the continuous microcapsule film forming system. The preparation method comprises the following steps: by taking a four-monomer copolymer emulsion of methyl methacrylate, n-butyl acrylate, acrylic acid and glycidyl methacrylate as a free film-forming component, taking n-hexadecane as a core material and taking polyurea as a shell layer, self-assembling and coating the outer side of the shell layer with a free reaction type film-forming intermediate to form a core-shell-outer coating layer three-layer structure microcapsule; cooperative unification of low-viscosity stable dispersion and long-acting sealing of the core material under the high solid content condition is achieved, the triple contradictions of sealing performance of a continuous coating rheological window and the core material, low-temperature film forming, heat resistance and adhesion resistance and shell layer densification and core material release response are solved, and the phase change energy storage film has wide application value in the field of phase change energy storage films and functional coatings.

The invention provides a density-adjustable high-temperature-resistant pure oil-based completion fluid and a preparation method thereof.The preparation method comprises the following steps that high-density chlorinated paraffin and n-hexadecane are selected and mixed to serve as a base oil phase, after mixing is conducted according to different proportions, a main emulsifier and an auxiliary emulsifier are added, and high-speed shearing dispersion is conducted; the defoaming agent, the high-temperature organic soil and the auxiliary additive are sequentially added, and all the components are uniformly mixed through high-speed shearing and stirring. By optimizing the synergistic effect of the base oil phase and the emulsifier component, the stability of the completion fluid in the high-temperature environment of 150 DEG C or above is remarkably improved, meanwhile, it is ensured that the density can be adjusted between 0.9 g / cm < 2 > and 1.2 g / cm < 2 >, and the well control requirements of deep wells and ultra-deep wells are met. The prepared pure oil-based completion fluid has the advantages of no free water phase, small damage to the reservoir, excellent chip carrying capacity and lubricating property, solves the problems of high-temperature sedimentation, out-of-control rheological property and the like of the traditional oil-based completion fluid, and provides reliable technical support for efficient development of high-temperature and high-pressure oil and gas reservoirs.

Embodiments allow for forming a friction-modified touch-sensitive surface on a touch screen panel. In particular, the touch-sensitive surface is enhanced with two friction-modifying materials that are interspersed with each other as a monolayer according to a predetermined pattern on the surface of the touch screen panel. In one embodiment, the refractive indices of the materials differ from each other by more than 0.10. In another embodiment, the materials have a dynamic coefficient of friction that is within one range or the other of 0.01 and 0.05, respectively, measured relative to printed paper that has a dynamic coefficient of friction of 0.17 by itself. In another embodiment, the materials have a water contact angle that is greater than 90 degrees and an oil contact angle that is greater than 30 degrees, the oil contact angle being measured with n-hexadecane.

The application discloses a strain with high emulsification activity and anti-plant disease function, and the strain is Bacillus subtilis (CY-57) which is preserved in the China General Microbiological Culture Collection Center with a preservation number of CGMCC NO.28223. Bacillus subtilis The strain can produce a biological surfactant at a high yield, has excellent emulsification performance on a plurality of hydrocarbon compounds such as cyclohexane, n-hexadecane, liquid paraffin, kerosene and diesel oil, and can significantly inhibit the growth and invasion of a plurality of plant pathogenic bacteria (such as tomato early blight, wheat root rot, wheat scab, soybean root rot and rice seedling disease). The application further discloses a fermentation culture process of the strain, emulsification activity and application in biological control of plant diseases, and application of the strain and metabolites, so that the strain has ecological safety and industrial practicability, and has a wide application prospect.

The invention discloses a phase change material for heat preservation of a battery pack and a heat preservation system applying the phase change material, and belongs to a heat preservation system.The phase change material is prepared from, by weight, 68%-73% of n-hexadecane, 26%-30% of n-eicosane, 0.5%-1.5% of graphene and 0.5%-1.5% of expanded graphite; the electric heater is connected with a plurality of phase change modules, the phase change modules are mounted on the outer surface of the battery pack, and the electric heater is in contact with the outer surfaces of the phase change modules; and the electric heater is respectively connected with the energy storage battery and the photovoltaic module. The phase-change material with high latent heat performance is obtained through compounding, the phase-change temperature interval of 10 DEG C or above can be obtained through solid-liquid conversion after the phase-change material is matched with an electric heater, then the temperature change interval of a base station battery pack in an extreme environment is effectively shortened, high heat conductivity is obtained, phase-change latent heat is fully utilized, and the service life of the battery pack is prolonged. Meanwhile, photovoltaic solar energy is used for supplying power to the energy storage battery and the electric heater, so that the system does not depend on a traditional power grid any more, and the use cost is low.

The invention relates to a general diesel fuel construction method and system capable of reproducing engine performance. The method comprises the following step: analyzing the components and content of target diesel oil by adopting comprehensive two-dimensional gas chromatography-time-of-flight mass spectrometry and nuclear magnetic resonance technologies. On the basis of n-hexadecane, isohexadecane and 1-methylnaphthalene, a component database is combined, and a model Sur0 is preliminarily constructed. Iterative correction is carried out through deviation functions of three levels of physicochemical characteristics, atomization characteristics and combustion emission characteristics. In each step, the calculation deviation is compared with a preset threshold value, the component proportion is adjusted, optimization models Sur1 and Sur2 are obtained in sequence, and finally a comprehensive alternative fuel model Sur3 capable of accurately simulating target diesel oil is obtained, so that the injection atomization characteristic, the ignition and combustion characteristic, the performance index and various emission characteristics of actual fuel in a cylinder are accurately reproduced; therefore, the method can be used for accurately simulating flow, mixing and combustion characteristics of the diesel engine.

A standard solution for basic nitrogen in a simulated oil product comprises acetanilide and the simulated oil product, the simulated oil product is composed of n-hexadecane, n-undecane, cyclopentane and isooctane according to the mass ratio of 1: (1.5-2.5): (2.5-3.5): (3.5-4.5), and the purity of the acetanilide is higher than 99 wt%, more preferably higher than 99.5%; the concentration of acetanilide in the standard solution is 0.1-1g / L. N-hexadecane, n-undecane, cyclopentane and isooctane in a specific ratio are used as solvents, the molecular structure is closer to that of light fuel oil, the selected components are stable in chemical property, and the chemical stability of a standard solution can be guaranteed; acetanilide has typical characteristics of organic nitrogen compounds in oil products, and when acetanilide is used as a representative of organic nitrogen, the acetanilide is single in source and stable in chemical property; the purifying agent is used for removing trace unsaturated hydrocarbon in the simulated oil product, and polymerization of the unsaturated hydrocarbon in the long-term storage process can be eliminated. The acetanilide concentration change amplitude of the obtained standard substance solution within one year is less than 1%.