23 results about "N octane" patented technology

The application provides a kind of eutectic solvent and its preparation method and application, the eutectic solvent includes hydrogen bond donor compound and hydrogen bond acceptor compound, the structural formula of hydrogen bond donor compound is wherein, R1 and R2 independently selected from n-octyl or iso-octyl, the hydrogen bond acceptor compound includes tri-n-octyl phosphine oxide.The eutectic solvent can be efficiently extracted from the permanent magnet rare earth waste hydrochloric acid solution of transition metal, can reduce the use of a large amount of organic solvent in the traditional extraction process.

A method of hydrogen (H2) storage and withdrawal is described. The method includes injecting a fluid stream into a subsurface formation via an injection well to form a composition containing a gas-phase mixture, a first liquid-phase mixture, and a solid matrix, injecting a H2-containing gas stream into the subsurface formation via the injection well to form a first gas mixture containing H2 gas, heating and pressurizing the subsurface formation containing the first gas mixture via at least one heat well to achieve a storage condition and maintaining the storage condition to store the H2 in the subsurface formation, injecting a CH4-containing gas stream into the subsurface formation via the at least one injection well to form a second gas mixture, withdrawing the second gas mixture via at least one production well, and introducing the second gas mixture into a hydrogen purification device including hydrogen-selective membranes.

The invention relates to the technical field of oil extraction, in particular to a step-by-step and step-by-step viscosity reduction method for super-heavy oil and application. The graded viscosity reducer provided by the invention is prepared from the following components: 30 to 40 percent of normal octane, 2.0 to 4.0 percent of sulfonate, 1.5 to 2.5 percent of normal butanol, 1.0 to 3.0 percent of NaCl and the balance of water. When the step-by-step and step-by-step viscosity reducer provided by the invention is applied under the oil reservoir condition, the steam injection pressure is reduced, the viscosity of the produced crude oil is greatly reduced, the average daily liquid yield is obviously improved before being compared with a measure, the periodic production time is prolonged, the water return rate and the oil-steam ratio are obviously improved, and the super heavy oil steam huff and puff production effect is improved. The technical problem in super-heavy oil reservoir exploitation is solved, the production effect of super-heavy oil steam huff and puff is improved from multiple dimensions, and a new way is developed for effective development and utilization of super-heavy oil resources.

The invention discloses a super-hydrophobic membrane for boiler feed water oxygen removal and a preparation method thereof.The preparation method comprises the steps that octadecyl trichlorosilane is dissolved in n-octane, surface spraying is conducted with a commercial polyvinylidene fluoride (PVDF) membrane as a base membrane, and after spraying is completed, the PVDF membrane is dried; the preparation method comprises the following steps: adding zinc oxide nanoparticles into n-octane for ultrasonic dispersion, adding perfluorodecyl trichlorosilane in a stirring state to obtain fluorinated zinc oxide, and spraying the fluorinated zinc oxide on a PVDF film to form a micro-nano composite structure on the surface of the film, thereby greatly enhancing the hydrophobicity of the film. When the membrane prepared by the method is applied to a boiler make-up water deoxygenization process, the removal rate of oxygen in water can be effectively improved.

The invention provides a preparation method of a phosphotungstic acid / silicon dioxide catalyst with a Janus structure and application of the phosphotungstic acid / silicon dioxide catalyst in a heterogeneous oxidation reaction. The catalyst takes silicon dioxide as a carrier, phosphotungstic acid is loaded on the surface, and an n-octane-anhydrous acetonitrile emulsion system can be effectively stabilized. The catalyst shows efficient catalytic activity in oxidative desulfurization and dye degradation reactions, can promote oxidative removal of dibenzothiophene and degradation of Congo red dye, is suitable for a complex heterogeneous reaction system in the thickened oil recovery and processing process, and has wide industrial application prospects.

The present invention relates to the field of energy conservation and environmental protection, and specifically to the application of a low eutectic solvent in the extraction of pyridine. The method is as follows: placing a tetrabutylammonium bromide-lactic acid low eutectic solvent in an n-octane solution containing pyridine, and extracting pyridine under constant temperature and magnetic stirring conditions; the tetrabutylammonium bromide and lactic acid have the structural formulas shown in (Ⅰ) and (Ⅱ). The low eutectic solvent prepared by the present invention has a strong capture ability for pyridine; at the same time, the low eutectic solvent is insoluble in n-octane, has good phase-forming ability, and can achieve phase separation at a smaller dosage. When the mass ratio of the low eutectic solvent to pyridine is 1:5, the extraction efficiency of pyridine is as high as 97.6%. The tetrabutylammonium bromide-lactic acid low eutectic solvent extractant of this invention experiment has high separation efficiency, is environmentally friendly and is low in price.

The invention discloses a PbS quantum dot and a preparation method and application thereof. The preparation method comprises the following steps: uniformly mixing lead oxide, oleic acid and octadecene, vacuumizing, heating to a first section temperature, and preserving heat; introducing inert gas, vacuumizing, heating to a second section temperature, reacting, injecting an octadecene solution containing bis (trimethylsilyl) sulfide after the reaction is completed, continuing the reaction, injecting n-hexane or n-octane after the reaction is completed to terminate the reaction, cooling the reaction liquid to 0-2 DEG C in an ice bath, and standing the reaction liquid at 0-2 DEG C; and after standing, centrifuging, and washing and drying the centrifuged supernatant liquid to obtain the PbS quantum dots. According to the preparation method of the PbS quantum dots, normal hexane or normal octane quenching reaction is adopted, and standing treatment is performed at 0-2 DEG C, so that residual impurities in the PbS quantum dots can be removed, and the purity and quality of the PbS quantum dots are improved.

The invention discloses a high-efficiency stable Pt-based catalyst for dehydrogenation of n-octane and a preparation method of the high-efficiency stable Pt-based catalyst, and belongs to the technical field of catalysis. The catalyst takes aluminum oxide, silicon dioxide or a Silicalite-1 molecular sieve as a carrier, and active components comprise a main active component platinum and three functional aids, wherein the first aid is at least one of lanthanum, cerium and zirconium, the second aid is at least one of zinc, copper, tin and manganese, and the third aid is at least one of potassium, sodium, calcium and magnesium. The preparation method comprises the following steps: sequentially loading the components on the carrier by adopting a step-by-step impregnation process, and carrying out ultrasonic treatment, drying and roasting to obtain the catalyst. The catalyst has high catalytic activity, high octene selectivity (more than 70%), low cracking byproduct selectivity (less than 3%) and excellent long-term operation stability in the dehydrogenation reaction of n-octane through the synergistic effect of multiple components, and the preparation process is simple and controllable and is easy for industrial production.

The invention discloses a synthetic method of tea geometrid sex pheromone (3Z, 6Z, 9Z)-octadecatriene, which comprises the following steps: carrying out bromination on cis-3-hexene-1-alcohol in a bromination system, and carrying out salt forming reaction on the brominated cis-3-hexene-1-alcohol and triphenylphosphine to obtain cis-3-hexenyl triphenylphosphonium bromide; the preparation method comprises the following steps: generating an alkynyl metal intermediate from 3-butyne-1-alcohol under the action of an organic metal reagent, and carrying out alkylation reaction on the alkynyl metal intermediate and n-octane bromide to obtain 3-dodecanol; carrying out hydrogenation reaction under the action of a catalyst, and then carrying out oxidation reaction under the action of an oxidizing agent to obtain cis-3-dodecenal; the preparation method comprises the following steps: dispersing cis-3-hexenyl triphenyl phosphonium bromide in an ether solvent, and carrying out Wittig reaction on the cis-3-hexenyl triphenyl phosphonium bromide and cis-3-dodecenal under the action of alkali to obtain the (3Z, 6Z, 9Z)-octadecatriene. The synthesis method only needs six-step reaction, the reaction condition is mild, the raw materials are cheap and easy to obtain, the yield is high, and large-scale production is easy.

The invention belongs to the technical field of n-octane purification, and provides a method for improving the purity of n-octane, which comprises the following steps: carrying out two-stage molecular sieve dehydration on an n-octane crude product, and carrying out hydrogenation reaction on the dehydrated product under the action of a Ni-Mo / Al2O3 catalyst to obtain a mixed fraction containing n-octane and trace impurities; introducing the mixed fraction into a two-stage molecular distillation system for fractionation, collecting a target fraction at 120-130 DEG C, adsorbing the target fraction through a modified Y-type molecular sieve adsorption column, and removing residual olefin and sulfide to obtain an intermediate product; and cooling the intermediate product to below 50 DEG C, carrying out membrane separation through a zeolite filled ceramic membrane assembly, and carrying out backwashing at intervals in the membrane separation process to obtain a normal octane product. According to the method disclosed by the invention, by matching process chains of dehydration, hydrogenation, distillation, adsorption and membrane separation, the purity of n-octane breaks through 99.5%, and an efficient, low-consumption and stable technical solution is provided for production of high-purity chemicals.

The invention discloses a photochromic antibacterial fabric as well as a preparation process and application thereof, and relates to the technical field of textile fibers. When the photosensitive color-changing antibacterial fabric is prepared, N, N-bis (2-ethoxyl) ethylenediamine reacts with 1-[chlorine (vinyl) phosphoryl] ethane to prepare flame-retardant dihydric alcohol; carrying out esterification condensation polymerization on terephthalic acid, ethylene glycol and flame-retardant dihydric alcohol to obtain polyester chips; the preparation method comprises the following steps: enabling chitosan to react with 1-vinyl-1H-imidazole-2-formaldehyde, so as to obtain modified chitosan; polyester chips and modified chitosan are mixed and then subjected to melt spinning, and modified polyester fibers are prepared; the modified polyester fiber is immersed in a 1-bromo-n-octane solution, and the antibacterial polyester fiber is prepared; spinning the antibacterial polyester fibers into an antibacterial polyester fabric; and adding the antibacterial polyester fabric into the photosensitive color-changing dye liquor to prepare the photosensitive color-changing antibacterial fabric. The photochromic antibacterial fabric prepared by the invention has good photochromic, antibacterial and flame-retardant properties.

This invention proposes a modified activated carbon adsorbent, its preparation method, and its applications. The modified activated carbon adsorbent is obtained by in-situ growth of ZIF-8 using activated carbon as a template, followed by covalent bonding of UiO-66-SO3H to form a three-layer composite structure of activated carbon-ZIF-8-UiO-66-SO3H. It utilizes the pore size of ZIF-8 to efficiently remove aromatic hydrocarbons and olefin impurities, while the sulfonic acid groups of UiO-66-SO3H achieve metal ion chelation and polar impurity capture. Combined with the macroporous structure of activated carbon, it ensures the removal of aromatic hydrocarbons, olefins, and metal ion impurities from n-octane. These components work synergistically to achieve high impurity removal efficiency. The modified activated carbon adsorbent has a simple preparation method, excellent regeneration performance, and can be recycled, showing significant application prospects.

The application provides a lubricating oil curing agent and a gel lubricant, a preparation method thereof and application in bearings, and relates to the technical field of lubricating materials.The lubricating oil curing agent provided by the application is prepared from raw materials including fatty acids, organic small-molecule compounds, nitrate, phosphomolybdate and water; the fatty acids include linoleic acid and / or linolenic acid, the organic small-molecule compounds include 1-octadecene and / or n-octane, and the nitrate includes one or more of strontium nitrate, iron nitrate and zirconium nitrate. The lubricating oil curing agent is added into lubricating oil, and a gel lubricant with low cost and excellent lubricating performance can be prepared by very simple operation, and batch preparation of the gel lubricant is realized. When the gel lubricant is used in bearing gears, under the conditions of high load and high-speed rotation, the gel lubricant can not only achieve good friction-reducing and wear-resisting effects, but also prevent the influence of lubricating oil flow and leakage on machines.

The present invention discloses a method for preparing organic halogen ammonium salt-surface-modified lead sulfide colloidal quantum dots. The method comprises the following steps: dissolving PbS CQDs in n-octane; dissolving the organic halogen ammonium salt in dimethyl sulfide (DMF) to obtain a ligand solution; adding the prepared ligand solution to the prepared PbS CQD n-octane solution; stirring to transfer the PbS CQDs from the n-octane phase to the DMF solution phase; and, after phase separation, separating the PbS CQDs from the DMF solution phase and drying to obtain organic halogen ammonium salt-coordinated PbS CQD powder. The present invention utilizes mixed organic halogen ammonium salts to replace mixed metal halides for quantum dot surface modification, thereby reducing the use of lead compounds. While ensuring surface passivation of the quantum dots, the method provides a green, safe, and environmentally friendly method for quantum dot surface modification.

The application discloses a weather-resistant water-based epoxy resin paint and a preparation method thereof, and the paint comprises a complex system solvent of a light stabilizer containing a hindered amine light stabilizer and an ultraviolet absorber, and the stability of the light stabilizer in the paint is improved. The hindered amine light stabilizer provides a modified bis-2,2,6,6-tetramethylpiperidyl octanedioate, and the weather resistance of the bis-2,2,6,6-tetramethylpiperidyl octanedioate is more excellent, normal octane used in synthesis can be recycled after distillation, production cost is low, and pollution is avoided. Therefore, the water-based epoxy resin paint maintains original physical properties, meanwhile, a color difference value and a light loss rate are reduced, and weather resistance is greatly improved.

This invention discloses a hydrophobic and biodegradable polylactic acid (PLA) cast film and its preparation method, belonging to the field of PLA film technology. The raw materials of the hydrophobic and biodegradable PLA cast film include the following components: 88-92 parts PLA, 8-12 parts poly(butylene terephthalate-adipate), 0.8-1.2 parts reinforcing agent, 0.3-0.8 parts compatibilizer, 2.5-3.5 parts toughening agent, and 0.2-0.5 parts antioxidant; wherein the reinforcing agent is obtained by modifying nano-titanium dioxide with n-octane bromide. The preparation method provided by this invention is simple to operate and suitable for industrial production. The resulting hydrophobic and biodegradable PLA cast film has high mechanical strength and elongation at break, while also possessing good hydrophobic properties. Furthermore, this film material is entirely made of biodegradable polymer materials, conforming to the current trend of green and environmentally friendly development, and providing an effective way to solve the environmental problems caused by traditional film products.

The application provides a method for preparing normal paraffin from coal-based hydrorefined naphtha, which comprises the following steps: performing rectification separation on the coal-based hydrorefined naphtha to obtain C6 and above alkane; feeding the C6 and above alkane into a de-normal-hexane rectification tower to obtain crude normal hexane and C7 and above alkane; feeding the C7 and above alkane into a de-normal-heptane rectification tower to obtain crude normal heptane and C8 and above alkane; feeding the C8 and above alkane into a de-normal-octane rectification tower to obtain crude normal octane and C9 and above alkane; feeding the C9 and above alkane into a de-normal-nonane rectification tower to obtain crude normal nonane and C10 and above alkane; and performing rectification and deep hydrogenation on each crude normal paraffin to obtain normal hexane product, normal heptane product, normal octane product and normal nonane product. The technical scheme of the application uses coal-based hydrorefined naphtha as raw material, has a simple process flow and low energy consumption, and overcomes the problem of single product structure in the prior art.

The invention discloses a porous hydrogel, a porous super absorbent resin and a preparation method thereof, the preparation method comprises the following steps: (1) mixing cellulose aerogel, normal octane, an initiator, a cross-linking agent and a hydrogel precursor solution, and carrying out polymerization reaction to obtain the porous hydrogel; (2) crushing the porous hydrogel, drying the crushed porous hydrogel, and crushing the dried porous hydrogel into micron-sized particles; and (3) spraying a surface cross-linking auxiliary agent on the surfaces of the micron-sized particles, then carrying out a cross-linking reaction, and after the reaction, uniformly mixing the micron-sized particles with gas-phase nano silicon dioxide to obtain the porous super absorbent resin. According to the invention, the cellulose aerogel and the n-octane can create a size-controllable hierarchical porous structure in which aerogel macropores and n-octane mesopores are synergistic in a resin network, so that the water absorption rate of the resin is greatly improved; meanwhile, a nanofiber network constructed by the cellulose aerogel serves as a rigid framework of the water-absorbent resin, the resin can be endowed with excellent gel strength, and the water retention capacity of the water-absorbent resin can be further improved.

The application discloses a non-noble metal dehydrogenation catalyst for n-octane dehydrogenation and a preparation method thereof, and belongs to the field of catalysis technology.The catalyst is a composite oxide catalyst, and comprises a first metal, a second metal, a third metal and an additive; the first metal is selected from at least one of Fe, Ni, Zn, Mg, Mn, Ti and Cu, the second metal is selected from at least one of Ce, Zr, La, Mo and W, the third metal is selected from at least one of Al, In, Ti, La and Mg, and the additive is selected from at least one of Li, Na, K, Ca and Mg; the molar content of the first metal is 20% to 80%, the molar content of the second metal is 10% to 60%, the molar content of the third metal is 20% to 80%, and the molar content of the additive is 1% to 10%, based on the total molar amount of metal elements.The catalyst has good activity and stability in the n-octane dehydrogenation reaction through the synergistic effect of multiple components, the total selectivity of C8 dehydrogenation products can reach 84.98% to 90.29%, the preparation process is simple and controllable, the cost is low, and the catalyst is suitable for industrial production.

The application provides a catalyst for preparing ethylbenzene from n-octane with high selectivity, a preparation method and application thereof, and relates to the technical fields of catalysts and organic synthesis. The catalyst for preparing ethylbenzene from n-octane with high selectivity comprises a molecular sieve and a metal active component loaded in the molecular sieve crystal, wherein the metal active component comprises a main metal and an auxiliary metal, the main metal comprises one or more of Pd, Pt, Ru and Rh, and the auxiliary metal comprises one or more of Sn, Re, Ga, Zn and In. The catalyst provided by the application has high activity and good stability, can convert n-octane in low-value naphtha into high-value ethylbenzene with high selectivity, and opens up a new way for efficient preparation of ethylbenzene. The results of examples show that the service life of the catalyst in the reaction of preparing ethylbenzene from n-octane is more than 600 h, the conversion rate of n-octane is greater than 80%, the selectivity of ethylbenzene is more than 65%, and the total aromatic hydrocarbon selectivity is greater than 75%.

The invention relates to the field of energy conservation and environmental protection, in particular to a ternary eutectic solvent extraction agent for deep denitrification of an oil product and a preparation method of the ternary eutectic solvent extraction agent. The extraction agent is prepared by taking tetrabutylammonium chloride as a hydrogen bond acceptor and ethylene glycol and oxalic acid as hydrogen bond donors according to a molar ratio of 1: 1: 1 through one-step heating and stirring at 80 DEG C for 3 hours, and is a uniform and transparent liquid at room temperature. According to the ternary system, the problem that tetrabutylammonium chloride-oxalic acid is difficult to form a phase is successfully solved through introduction of ethylene glycol, more active sites are provided, and alkaline and non-alkaline nitrides such as indole, quinoline, pyrrole and pyridine can be efficiently extracted at the same time. The nitrogen removal efficiency of various nitrides is always kept at an excellent level and can generally reach more than 90% by extracting the nitrogen-containing normal octane simulation oil according to the mass ratio of 1: 10-1: 30 at 20-60 DEG C for 5-90 minutes; the method has the advantages of cheap raw materials, simple process, mild conditions, good cycle performance and environmental friendliness, and is suitable for deep denitrification of gasoline, diesel oil, lubricating oil and other oil products.

The invention relates to the technical field of organic synthesis, and discloses a method for separating and purifying 1-octene from a Fischer-Tropsch oil product. The method comprises the following steps: feeding a Fischer-Tropsch oil product into a first cutting tower and the middle part of the first cutting tower in sequence for cutting to obtain a C8 fraction, carrying out deacidification, washing, drying, extraction deoxidation and adsorption deoxidation on the C8 fraction, then carrying out etherification reaction, then feeding the C8 fraction into a first rectifying tower for rectification, and obtaining the Fischer-Tropsch oil product. Then the mixture enters a simulated moving bed separation unit to be subjected to alkane-olefin separation, 1-octene material flow and n-octane material flow are obtained, the 1-octene material flow enters a second rectifying tower to be subjected to secondary rectification, and 1-octene is obtained. The purity of the 1-octene prepared by the method is 98% or above, the yield is 90% or above, meanwhile, the method is low in energy consumption, simple in process and convenient to operate, and other substances separated in the whole process can be recycled.

The present invention relates to a method for synthesizing highly dispersed ZSM-5 nanosheets by in-situ assembly. Specifically, tetraethyl silicate (or sodium silicate), aluminum sulfate octahydrate, N,N,N,N-tetramethyl-1,6-hexanediamine, C6-C22-bromoalkanes (bromo-n-hexane, bromo-n-octane, bromo-n-decane, bromo-dodecane, bromo-tetradecane, bromo-hexadecane, bromo-octadecane, bromo-dodecane), sulfuric acid, sodium hydroxide and water are used as raw materials, and nanosheet ZSM-5 molecular sieves are dynamically synthesized using an in-situ assembly method. The in-situ assembly method dynamic synthesis method for preparing highly dispersed ZSM-5 nanosheets provided by the present invention has the advantages of simple and easy synthesis process and low cost. The ZSM-5 nanosheets obtained are multi-cell stacking structures, and the single-cell nanosheets obtained by a special template method have higher self-support and stability, and have a higher external specific surface area and a meso-micro composite pore structure.