38 results about "N octane" patented technology

The invention discloses an n-octane aromatization hierarchical pore structure catalyst and a preparation method and application thereof.According to the preparation method, a hierarchical pore three-dimensional nanosheet ZSM-5 molecular sieve serves as a catalyst carrier, and on the basis, the Zn-modified hierarchical pore three-dimensional nanosheet ZSM-5 molecular sieve catalyst is prepared through an equivalent-volume impregnation method; the prepared n-octane aromatization hierarchical pore structure catalyst not only has the advantages of high yield, short preparation time, simple preparation method and the like, but also has a unique three-dimensional nanosheet shape, a rich mesoporous structure and a relatively large specific surface area. The catalyst is applied to an n-octane aromatization reaction, and has the characteristics of high aromatic hydrocarbon selectivity, long service life, stable catalytic performance, flexible process operation and the like.

The invention belongs to the technical field of extraction separation, and relates to a desulfurization extraction agent and a method for removing thiophene by using the desulfurization extraction agent. The preparation method comprises the following steps: loading a deep eutectic solvent onto graphite phase carbon nitride coated graphene oxide nano-microspheres by an impregnation method to obtain a composite material for removing thiophene, and then mixing and stirring the composite material, a thiophene n-octane solution and hydrogen peroxide for desulfurization. Oxidation desulfurization, adsorption desulfurization and extraction desulfurization are comprehensively used, the desulfurization efficiency is high, the operation condition is mild, and the method is environment-friendly.

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 azelaic acid processing, in particular to an azelaic acid cooling crystallization method and equipment, the azelaic acid cooling crystallization equipment comprises a bearing table, a mounting rack, a servo motor, a fixing frame, a reaction kettle, a feeding port and a discharging port, the mounting rack is fixedly mounted on the upper surface of the bearing table, the servo motor is fixedly mounted on one side of the mounting rack, and the fixing frame is fixedly mounted on the other side of the mounting rack; the fixed frame is fixedly mounted on an output shaft of the servo motor, the reaction kettle is fixedly mounted on the inner side of the fixed frame, the feed port is formed in the upper side of the reaction kettle, and the discharge port is formed in the lower side of the reaction kettle. The n-octane layer and the azelaic acid crystallization layer can be sent out from the two outlets through cooperation with the impurity removal assembly, impurities in the n-octane layer on a phase interface are prevented from making contact with an azelaic acid aqueous solution, and the purity of azelaic acid crystallization is improved.

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 present invention discloses a method for preparing a copper sheet corrosion inhibitor for gasoline and diesel components produced as byproducts from the hydrogenation of waste lubricating oils, belonging to the technical field of petroleum product corrosion inhibition. The method comprises preparing a saturated isooctane / n-hexadecane solution of tetrazole; preparing an n-octane / n-hexadecane solution of 8-hydroxyquinoline or imidazole; mixing dropwise, adjusting the pH, and heating in a water bath; adding organic cerium, cooling, and aging the solution. The copper sheet corrosion inhibitor for gasoline and diesel components produced as byproducts from the hydrogenation of waste lubricating oils prepared using this method can significantly reduce the corrosion level of the copper sheet produced as a byproduct from the hydrogenation of waste lubricating oils, even at a very low dosage, thereby achieving the technical purpose of inhibiting copper sheet corrosion.

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 relates to the technical field of colloidal quantum dot manufacturing, in particular to a method for preparing HgTe quantum dots based on ODT-assisted synthesis, which comprises the following steps: adding oleylamine into a single-mouth bottle, sequentially adding HgCl2 and ODT into the bottle, adding a TOP-Te solution, finally injecting tetrachloroethylene, trimercaptopropionic acid and isopropanol into the solution, centrifuging to obtain a precipitate, dispersing the precipitate in n-octane, and drying to obtain the HgTe quantum dots. The HgTe quantum dot solution is obtained. According to the method, ODT-assisted synthesis is adopted, and the HgTe CQDs are excellent in monodispersity and exciton absorption characteristic; the HgTe quantum dot film prepared from the synthesized HgTe quantum dots is flat and uniform, and has low roughness.

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.

The invention discloses an application of a molecular sieve supported metal catalyst in preparation of long-chain alkane diesel oil by hydrodeoxygenation of stearic acid. The catalyst is composed of metal and an FAU molecular sieve, and the metal active component accounts for 0.1-20 wt%. According to the invention, the metal is loaded on the molecular sieve by adopting improved wet impregnation, the acid-metal catalyst with high metal dispersity is prepared, and the dual-function attribute of the catalyst can be effectively exerted. The catalysis method comprises the following steps: adding stearic acid, the catalyst, an organic solvent and an internal standard substance (n-octane) into a closed high-pressure reaction kettle, filling hydrogen, and reacting at 150-350 DEG C to obtain the long-chain alkane diesel oil (octadecane and heptadecane). Preferably, the catalyst can achieve complete conversion and the yield of 90% or above in preparation of long-chain alkane diesel oil through hydrodeoxygenation of stearic acid, has good catalytic stability, and is not inactivated after continuous circulation for five times.

The invention discloses a refining method of ultra-dry electronic-grade n-octane, and belongs to the technical field of chemical purification. Comprising the following steps: S1, dewatering commercially available n-octane by using a 4A molecular sieve; s2, filtering to remove solid particles in the n-octane; s3, introducing n-octane into a rectifying still, keeping the pressure in the rectifying still at-60kPa to-85kPa, starting heating to set the temperature in the rectifying still at 120-160 DEG C, starting to receive a front fraction when the tower top temperature rises to 100-115 DEG C, receiving a main fraction when the front fraction accounts for 5%-10% of the mass of the n-octane, and collecting the front fraction and the main fraction respectively, wherein the main fraction accounts for 80%-90% of the mass of the n-octane; the main fraction is the ultra-dry electronic-grade n-octane. According to the method, efficient separation of trace water and components is realized through cooperation of molecular sieve water removal and high-vacuum rectification. The yield of the main fraction reaches 80-90%, and the water content is 1t; the component purity is greater than or equal to 99.5%, and the metal purity can reach the 7N standard, so that the requirements of electronic-grade products are met.

The invention relates to the technical field of ocean testing, and discloses a method for measuring the content of yellow phosphorus in seawater, the method for detecting the content of the yellow phosphorus in the seawater is established for the first time, the problem that a seawater matrix inhibits the extraction effect is effectively solved by modifying a working curve, and the accuracy of a detection result is ensured. The content of yellow phosphorus in seawater is measured in a vortex oscillation extraction mode, a vortex oscillator is high in extraction efficiency, easy and convenient to operate and low in cost, meanwhile, n-octane is adopted as an extraction agent, the extraction efficiency is high, and harm to human bodies and the environment is avoided.

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 invention relates to a ZSM-57 molecular sieve and a preparation method and application thereof, and the method comprises the following steps: carrying out first mixing on a silicon source and an alkali source to obtain a first mixture; mixing an aluminum source, a template agent and optional water with the first mixture to obtain a second mixture; performing crystallization treatment on the second mixture to obtain a crystallized product; wherein the template agent is a reaction mixture of 1, 5-dibromopentane and triethylamine. The ZSM-57 molecular sieve disclosed by the invention is simple in preparation process, small in template agent consumption and low in synthesis cost, and shows relatively high cracking capability when being used for catalytic cracking of n-octane.

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 invention discloses a micro-fluidic technology-based epsilon-HNIW particle size regulation and control method, which comprises the following steps: by taking ethyl acetate as a solvent and petroleum ether, n-heptane or n-octane as a non-solvent, adjusting the types of the used solvent and non-solvent and a subsequent treatment method, obtaining three products with different particle sizes under a micro-fluidic preparation system, and respectively obtaining D50 of 2.77 [mu] m (Span: 0.646), 17.22 [mu] m (Span: 0.507) and 50.35 [mu] m (Span: 0.582). The epsilon-HNIW particle size regulation and control method based on the microfluidic technology has the advantages that operation is safe, continuous preparation is achieved, the product particle size is controllable, particle size distribution is narrow, and the product crystal form is epsilon-type.

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.

A method of separating components of asphalt by using molecular templates wherein the separated components can be reassembled comprise the steps of: mixing a mixture of functional monomers with templa

The invention discloses a kerosene phase change material with solid-liquid thixotropic reversible transformation performance. The kerosene type phase change material is an inverted non-flowing gel state cured sample obtained by heating and blending a liquid energetic material and a phase change factor and cooling; the liquid energetic material is a low-polarity organic liquid energetic material and comprises normal octane, kerosene and aviation kerosene; the addition amount of the phase change factor in the kerosene phase change material is 15-80 mg / mL. The method comprises the following steps: heating and blending with a phase change factor of an amphiphilic amino acid derivative containing a urea bond, and then cooling, so that low-polarity liquid energetic materials such as liquid normal octane, kerosene and aviation kerosene (JP-10) are cured, and a cured sample is in an inverted non-flowing solid gel state; and a gel curing sample has solid-liquid thixotropic reversible transformation performance. The operation method is simple, the cost is low, and the practicability is high.

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 method for purifying electronic-grade n-octane, which adopts special catalyst particles and a special complexing purification method, and the catalyst is formed by loading tungsten oxide powder, cobalt powder, nickel powder, copper powder and chromium powder on a ceramic matrix; special complexing purification is used, urea, isopropanol and water are mixed evenly, then a complexing solution is used for complexing crude n-octane, standing and settling are conducted, and a urea complex is fully settled and crystallized; after the complex is separated out, washing, finally heating the urea complex to decompose the urea complex, and separating a wax liquid phase; washing and distilling the wax liquid phase to obtain complexed dewaxed purified n-octane; then, filtering, dewatering, rectifying and removing impurities to obtain a final product; and finally, packaging the final product in a quartz container in a vacuum cavity to obtain the product. The method provided by the invention has the characteristics of 8N-grade purity, comprehensive purification by multiple methods, high rectification efficiency, high yield, and simple and easy separation of impurity components.