1563 results about "Hexane" patented technology

Disclosed in the present invention are a bimetallic-atom-loaded porous carbon framework material, and a preparation method therefor and the use thereof. The preparation method comprises: by taking a metal organic framework as a precursor raw material, and by using the self-polymerization of a high-molecular polymer on the surface of the metal organic framework, forming a polymer-coated metal-based organic framework material (PM@MOF) having a core-shell structure; and then capturing the metal of a metal chloride salt solution by using surface functional groups of the PM@MOF dispersed in n-hexane, so as to obtain a bimetallic element-doped polymer-coated metal-based organic framework material, and subjecting same to a high-temperature treatment in an argon gas atmosphere so as to obtain a bimetallic-atom-loaded porous carbon-based material (MD@PC). In the present invention, by loading bimetallic atoms on a nitrogen-doped porous carbon matrix to form MD-NX coordination sites, which have the dual functions of sulfur fixation and catalysis, the agglomeration degree of intermediate phase lithium sulfide can be reduced, thereby guaranteeing that the lithiation reaction of sulfur is more sufficient, rapid and efficient.

The invention discloses gold-titanium alloy nanoparticles as well as a wet chemical preparation method and application thereof. The preparation method comprises the following steps: in a water-free and oxygen-free environment, uniformly dissolving a gold salt, a titanium salt and a support carrier in an ether solvent, mixing with lithium triethylborohydride, transferring into a high-pressure reaction kettle, stirring and heating to 180-220 DEG C under the inert gas pressure of 0.5-1 MPa, and keeping the temperature for 1-4 hours; and after the mixture is cooled to the room temperature, the product solution is diluted with normal hexane, cleaning and drying are conducted, and the gold-titanium alloy nanoparticles are obtained. According to the invention, gold salt and titanium salt adsorbed on a support carrier are reduced by using a strong reducing agent under the conditions of high temperature and high pressure, and highly dispersed nanoparticles with uniform particle size are prepared; by introducing the supporting carrier, the problem that the particle size is increased due to agglomeration of alloy nanoparticles at high temperature is avoided, the catalytic performance and the anti-sintering performance of the catalyst are enhanced through strong interaction with the carrier, and the catalyst has wide application prospects in the fields of CO thermal oxidation and CO electrochemical oxidation.

The invention relates to the technical field of preparation of polymer oil-water separation membranes, in particular to a preparation method, a product and application of a hydrophilic PLA oil-water separation membrane. The preparation method of the hydrophilic PLA oil-water separation membrane comprises the following steps: dissolving polylactic acid in an organic solvent to obtain a spinning solution; carrying out electrostatic spinning on the spinning solution to prepare a PLA nanofiber membrane; the PLA nanofiber membrane is soaked in a dopamine hydrochloride solution, then membrane cloth is taken out, washed and dried, and the hydrophilic PLA oil-water separation membrane is obtained. The preparation method is low in cost and simple in preparation process. The PLA (at) PDA nanofiber membrane prepared by the preparation method disclosed by the invention is relatively high in oil-in-water emulsion separation efficiency and relatively high in separation rate, and has a good separation effect on n-hexane, gasoline, petroleum ether, peanut oil and the like, and the separation efficiency can reach 98% or above. The PLA (at) PDA nanofiber membrane disclosed by the invention is simple and convenient to apply and does not cause secondary pollution.

The present invention provides a zirconium-based metal-organic framework material and a preparation method therefor and the use thereof, and an adsorption separation device and method. The zirconium-based metal-organic framework material has a chemical structural formula of [C18H6O16Zr3]n, and comprises zirconium and an organic ligand forming a coordination bond with zirconium, wherein the organic ligand is diphenylethyne-3,3′,5,5′-tetracarboxylic acid. The molecular structure of the zirconium-based metal-organic framework material of the present invention is a three-position network structure having a one-dimensional channel; and in the present invention, the size of the one-dimensional channel is accurately controlled by changing the aspect ratio of the organic ligand, such that the zirconium-based metal-organic framework material efficiently separates a hexane isomer by means of a kinetic effect.

The invention discloses a purification method of 1, 3, 6-hexanetricarbonitrile. The purification method comprises the following steps: S1, extracting a crude product 1, 3, 6-hexanetricarbonitrile by using an extracting agent; s2, carrying out vacuum film rectification on the 1, 3, 6-hexanetricarbonitrile extracted in the step S1; s3, diluting the 1, 3, 6-hexanetricarbonitrile rectified in the step S2 by using a diluent, and then decolorizing by using activated carbon; and S4, carrying out reduced pressure distillation on the decolored 1, 3, 6-hexanetricarbonitrile in the step S3, and when no diluent flows out, introducing nitrogen into the 1, 3, 6-hexanetricarbonitrile and continuously distilling to obtain a target product. According to the method, the purity and chromaticity meet the requirements of a battery grade after extraction with an extracting agent, decoloration with activated carbon and reduced pressure distillation, then nitrogen is introduced to take away residual moisture and diluent without introducing other substances, so that the content of metal ions meets the requirements of the battery grade, higher requirements are met through a simple method, and industrial production is facilitated.

The invention belongs to the technical field of insulator materials, and particularly relates to an insulating busbar and a preparation method thereof. The preparation method of the insulating busbar comprises the following steps: coating glue on the surface of a busbar base material, and drying to obtain a busbar with a bonding layer; the preparation method comprises the following steps: mixing 40 to 60 parts of silicon resin, 20 to 40 parts of grafted silicon dioxide, 10 to 20 parts of aluminum oxide and 2 to 4 parts of 2, 5-dimethyl-2, 5-bis-(tert-butylperoxy) hexane, so as to obtain a sizing material; placing the busbar with the bonding layer in a mold, then adding a sizing material, and pressing to obtain an insulating busbar; the preparation method of the grafted silicon dioxide comprises the following steps: stirring m-aminobenzoic acid and 3-aminopropyltriethoxysilane for reaction to obtain a grafting solution, and adding silicon dioxide into the grafting solution for grafting reaction to obtain the grafted silicon dioxide.

The invention belongs to the technical field of membrane separation, and particularly relates to a nanofiltration membrane for efficient salt dyeing separation and a preparation method and application thereof.The preparation method comprises the following steps that 1, ionic liquid and water are mixed to obtain a mixed solution, cycleanine is dissolved in the mixed solution to obtain a water-phase solution, and the water-phase solution is filtered to obtain a filtrate; pouring the water-phase solution to the surface of the base membrane and completely infiltrating the water-phase solution; and 2, dissolving isophthaloyl dichloride in normal hexane to obtain an organic phase solution, pouring the organic phase solution to the surface of the membrane treated in the step 1, and carrying out an interfacial polymerization reaction to obtain the nanofiltration membrane for efficient salt dyeing separation. According to the preparation method disclosed by the invention, the nanofiltration membrane prepared by taking cycleanine and isophthaloyl dichloride as monomers through interfacial polymerization has a highly-ordered honeycomb nanopore structure, charges on the surface of the membrane are close to neutral, and the ionic liquid added into a water-phase solution further improves the hydrophilicity of the surface of the membrane; the permeation flux and selectivity of the membrane can be effectively improved.

The invention provides a preparation method and application of a catalyst for methane normal hexane co-aromatization, a simple in-situ hydrothermal synthesis method is adopted, platinum and nickel are dispersed in a ZSM-5 molecular sieve, and a metal packaging type NiPt-coated ZSM-5 catalyst is synthesized. When the catalyst is applied to methane and normal hexane co-aromatization reaction, the catalyst shows relatively high methane conversion rate and aromatic hydrocarbon selectivity. The molecular sieve packaging mode not only can improve the dispersity of the active component so as to improve the capability of activating methane, but also can improve the high-temperature stability of the active component and prolong the service life of the catalyst, and can effectively solve the problems of high reaction temperature and poor catalyst stability in the existing methane aromatization technology. And the method has a good practical application prospect.

This disclosure relates to the fabrication of high-performance thin film composite (TFC) reverse osmosis (RO) membranes comprising a thin polyamide rejection layer (thickness of 100-200 nanometer), a porous substrate including polysulfone (PSf) layer (thickness of 40-50 micron) cast on polyester nonwoven fabric (thickness of ˜100 micron). Hydrophilic and antibacterial TFC polyamide RO membranes were developed by incorporating green Lignin and nanostructured silver-based metal organic frameworks (MOFs) into the selective layer. The polyamide layer of TFC RO membranes was fabricated on the porous PSf substrate by interfacial polymerization between aqueous monomer solutions containing MPD, and adequate additives in water and organic monomer solutions containing TMC in the mixture of hexane and co-solvents. The optimized produced RO membranes were provided water flux of 95-100 LMH and sodium chloride (NaCl) salt rejection of 98.5-99.0% during filtration of 2000 ppm NaCl solution at 225 psi pressure, and water flux of 55-60 LMH and sodium chloride (NaCl) salt rejection of 98.6-98.9% during filtration of 35000 ppm NaCl solution at 800 psi pressure. This disclosure also relates to developing a roll-to-roll PSf membrane as a substrate for making TFC RO membranes for water desalination

The invention discloses a preparation method of EVOH, and relates to the technical field of EVOH. According to the method, a low-temperature (0-5 DEG C) methanol-n-hexane mixed solvent system is creatively adopted and matched with a penetration enhancer to realize synergistic extraction, so that synchronous and deep removal of polar and non-polar small molecular impurities in the EVA is finally realized, the content of impurities in the EVA is remarkably reduced, and the self-polymerization reaction of residual monomers is effectively inhibited; therefore, a key guarantee is provided for subsequent preparation of high-quality EVOH products. The film processed by the EVOH prepared by the invention has the characteristics of few crystal points and high product quality, and can be applied to the field of high-barrier packaging film materials.

The invention relates to the technical field of membrane separation, in particular to a preparation method of a pH-step-by-step thermocuring regulation sodium-magnesium separation nanofiltration membrane. The method comprises the following steps: (1) pre-treating a base membrane; (2) preparation and treatment of an aqueous phase solution: S1, preparing the aqueous phase solution according to mass fraction: sequentially adding 1.2%-1.6% of piperazine, 0.10%-0.14% of triaminopyrimidine and 0.14%-0.18% of polyethylene glycol into deionized water, and stirring until the piperazine, the triaminopyrimidine and the polyethylene glycol are completely dissolved to form the aqueous phase solution; s2, adjusting the pH value of the water-phase solution to 10-11 by using hydrochloric acid; s3, pouring the water-phase solution of which the pH is adjusted on the surface of the pretreated base membrane, standing, and blow-drying to form a uniform water-phase layer; (3) interfacial polymerization reaction: S1, preparing an oil phase solution: adding 0.10-0.14% of trimesoyl chloride into n-hexane, and performing ultrasonic treatment until the trimesoyl chloride is completely dissolved; s2, pouring the oil-phase solution on the surface of the base membrane subjected to water-phase treatment, and after reaction, pouring out redundant solution to form a polyamide separation layer, so as to obtain a membrane sheet; (4) performing a step-by-step thermocuring process; and (5) cleaning and storing.

The invention relates to the field of pharmaceutical analytical chemistry, in particular to a method for determining tandospirone and salt intermediates thereof, high performance liquid chromatography is adopted, and chromatographic conditions include that a chromatographic column with octadecylsilane chemically bonded silica as a filler is adopted, and gradient elution is performed by a mobile phase A and a mobile phase B; wherein the mobile phase A consists of a first water phase and acetonitrile; the mobile phase B is composed of a second water phase and acetonitrile; the first water phase is a water solution containing monopotassium phosphate and sodium hexanesulfonate, and the pH value of the first water phase is 3.0-3.8; the second water phase is an aqueous solution containing monopotassium phosphate and sodium hexanesulfonate, and the pH value of the second water phase is 1.8-2.6. The testing method disclosed by the invention has good specificity, accuracy and repeatability, and can be used for monitoring the quality of the tandospirone raw material medicine.

The invention provides a preparation method of a high-flux stable-selection anti-fouling nanofiltration membrane, which comprises the following steps: carrying out amination modification on a nano material by an activation method to prepare a modified nano material; piperazine, an acid absorbent and the modified nano material are added into deionized water to be mixed, and a water phase solution is prepared; the preparation method comprises the following steps: mixing trimesoyl chloride and normal hexane to prepare an organic phase solution; immersing the polyethersulfone-based membrane into the water phase solution, draining, inversely immersing into the organic phase solution, and carrying out interfacial polymerization reaction to generate a polyamide layer to obtain a composite membrane; and then carrying out post-treatment on the composite membrane to obtain the composite membrane. The membrane has high permeability, high selectivity and strong anti-pollution performance.

The invention provides a hole transport layer precursor solution, a hole transport layer, a preparation method and application of the hole transport layer, and a perovskite cell, and belongs to the technical field of hole transport layers. The hole transport layer precursor solution comprises a self-assembled single molecule and an organic solvent; the organic solvent comprises a solvent A, a solvent B and a solvent C; the solvent A comprises more than one of a phosphate ester solvent and an alcohol ether solvent; the solvent A contains four hydrogen bond receptors; the boiling point of the solvent A is 215-290 DEG C; the solvent B comprises more than one of ethanol, isopropanol, normal propyl alcohol, butanol, ethylene glycol and N, N-dimethylformamide; the solvent C comprises more than one of ethyl acetate and normal hexane. A ternary hydrogen bond network is formed through the solvent A, the solvent B and the solvent C, the agglomeration degree of SAM molecules is remarkably reduced, and the device performance is improved.

The invention relates to the technical field of repair materials, and particularly discloses an extracellular matrix fiber material as well as a preparation method and application thereof. The invention discloses a preparation method of an extracellular matrix fiber material. The preparation method comprises the following steps: taking animal tissues, and carrying out virus inactivation, decellularization and antigen removal, degreasing, drying, grinding and sterilization; the decellularization and antigen removal method comprises the following specific steps: sequentially soaking a sample with a surfactant solution for h; then, soaking treatment is carried out by adopting a salt-alkali solution which contains 0.05-3 mol / L of salt and has the pH value of 8-11; then carrying out soaking treatment by adopting a 0.1-1wt% enzyme solution; and in degreasing, one or more of normal hexane, trichloromethane, dichloromethane, methanol, ethanol, acetone, diethyl ether and ethyl acetate are used for soaking the sample. According to the technical scheme, the ECM powder particle material with high growth factor content is prepared.

The present invention relates to the technical field of nanofiltration membranes, and particularly relates to a preparation method for a nanofiltration membrane for regulating and controlling membrane surface charges. The preparation method comprises: step 1: (1) sequentially adding piperazine, a fiber additive, an ionic liquid and polyvinyl pyrrolidone into deionized water to obtain a water phase; and (2) adding trimesoyl chloride into normal hexane to serve as an oil phase; step 2, dipping a base membrane in the water phase for 1-3 minutes, and removing the redundant water phase; transferring same into the oil phase and subjecting same to polymerization for 2-3 minutes, and removing the redundant solution; and curing same at 80-85ºC for 5-6 minutes, and dipping same in deionized water for 1-2 days, so as to obtain a composite base membrane; and step 3, firstly placing the composite base membrane in a sodium hypochlorite solution for a primary post-treatment, and cleaning same; and transferring same into a sodium hydrosulfide solution for a secondary post-treatment, washing same until neutral, soaking same in deionized water for 1-3 days, and drying same to obtain a nanofiltration membrane.

The present invention discloses a fluorosilicone rubber, a fluorosilicone rubber hose and a preparation method and application thereof. The fluorosilicone rubber is prepared from the following components calculated by weight: 50 to 70 parts of fluorosilicone raw rubber; 20 to 45 parts of high temperature flame retardant silicone rubber; 30 to 40 parts of fumed silica; 0.5 to 2 parts of diisopropylbenzene peroxide; 5 to 10 parts of hydroxy silicone oil; 1 to 3 parts of 2,5-dimethyl-2,5-di(tert-butylperoxy)hexane. The fluorosilicone rubber hose of the present invention has good elasticity and flexibility, convenient installation and layout, convenient maintenance, good vibration-proof effect and high reliability. The bonding strength between the hose and the silicone is good, the fatigue resistance of the hose is excellent, the raw materials of the product are easy to obtain, the cost is low, and it is conducive to large-scale production and improving market competitiveness. The combination of fluorosilicone rubber and high temperature resistant silicone saves the cost of raw materials, and can also achieve the characteristics of high temperature resistance, weather resistance, aging resistance and flame retardancy, and at the same time has a breakthrough development in technology.

A relief precursor includes a dimensionally stable support, and at least one photopolymer layer including at least one binder, at least one photoinitiator or photoinitiating system, and at least one component with at least one unsaturated group and at least one plasticizer. The at least one plasticizer is a bio-based plasticizer, and has a UV transmission at 365 nm of a solution of 5 wt % plasticizer in n-hexane of higher than 15%.

The invention relates to the technical field of electronic adhesives, in particular to an n-hexane-containing polyurethane electronic adhesive and a preparation method thereof.The n-hexane-containing polyurethane electronic adhesive is prepared from, by weight, 40-45 parts of polyether polyol, 25-30 parts of polypropylene glycol, 35-40 parts of isocyanate, 1-2 parts of 1, 4-butanediol, 0.02-0.03 part of a catalyst, 6-7 parts of flame-retardant heat-conducting filler, 1.2-1.5 parts of foaming microcapsules and 1-2 parts of a foam stabilizer; by adding the flame-retardant heat-conducting filler and the foaming microcapsule taking normal hexane as a core, the problem that the existing polyurethane electronic glue is poor in heat-conducting property after foaming is solved, and meanwhile, the polyurethane electronic glue also has good flame-retardant property.

The invention relates to the technical field of all-solid-state batteries, in particular to air-stable argyrodite type sulfide electrolyte, a preparation method thereof and an all-solid-state battery. The air-stable argyrodite type sulfide electrolyte provided by the invention comprises a sulfide solid electrolyte and a protective layer formed by self-assembly of organic molecules on the surface of the sulfide solid electrolyte, wherein the sulfide solid electrolyte is argyrodite type sulfide solid electrolyte, the general formula of the sulfide solid electrolyte is Li < 7-a > PS < 6-a > X , X is halogen, and a is more than 0 and less than 2; the organic molecule is at least one of 1-methoxyhexane, 2-heptanone, 3-chloropropanol, 4-chlorobenzyl mercaptan, n-amylamine, 5-chloromethyl-1, 3-benzodioxole, chlorophenylmethane and ethylbenzene, and the organic molecule is at least one of 1-methoxyhexane, 2-heptanone, 3-chloropropanol, 4-chlorobenzyl mercaptan, n-amylamine, 5-chloromethyl-1, 3-benzodioxole, chlorophenylmethane and ethylbenzene. According to the air-stable argyrodite type sulfide electrolyte provided by the invention, the stability of the sulfide electrolyte to water can be enhanced, and the ionic conductivity of the sulfide electrolyte can be ensured.

The application discloses a preparation method of carbon aerogel material for light electromagnetic shielding, and comprises the following steps: adding resorcinol, phloroglucinol, a template agent and formaldehyde into pure water, stirring and dissolving to obtain a precursor solution; adding the precursor solution into white oil containing a surfactant, emulsifying, heating in an oil bath and fully reacting; centrifugal separation to obtain powder, high-temperature carbonization, dispersion in oleylamine, addition into a stock solution containing nickel acetylacetonate, triphenylphosphine and oleylamine, high-temperature reaction and cooling, addition of a mixture of hexane and ethanol to obtain a product; centrifugal separation and washing to obtain light high-electromagnetic-shielding carbon aerogel. The carbon aerogel material for light electromagnetic shielding prepared by the method has the advantages of small density, high efficiency, corrosion resistance, high electromagnetic shielding efficiency, high product yield and the like, and by controlling the nucleation and growth rate of Ni2P, the Ni2P nanoparticles can be uniformly grown on the carbon aerogel microspheres, and the method is suitable for application in large-scale industrial production.

To provide a rubber composition for fenders which gives a fender excellent in processability, elongation, and ease of buckling.SOLUTION: The rubber composition for fenders according to the present invention contains: a base rubber containing a natural rubber; carbon black; 1,6-bis(N,N-dibenzylthiocarbamoyldithio)hexane; and sulfur. The blending amount of the 1,6-bis(N,N-dibenzylthiocarbamoyldithio)hexane is 1.0 pt.mass or more and 3.0 pts.mass or less based on 100 pts.mass of the base rubber. The blending amount of the sulfur is 0.8 pt.mass or more and 2.0 pts.mass or less based on 100 pts.mass of the base rubber.SELECTED DRAWING: None

A TPC-OTBS n-hexane solution is added to a mixture of TPC-OSO2F, DMF, and DBU and allowed to stand to produce a crosslinked solvent gel; the crosslinked solvent gel is added to methanol, stirred, and dried to produce the porous crosslinked material. The gel acquired can be prepared into a pore-rich solid porous organic polymer material by means of solvent exchange. SEM and TEM are used to characterize the surface and internal morphologies of the solid material, and the porous morphology thereof is discovered, with large pores being the majority. Infrared and nuclear magnetic resonance are used to characterize the structure of a crosslinked polysulfate; the complete reaction of a sulfuryl fluoride group is proven by means of solid-state fluorine nuclear magnetic resonance spectroscopy and XPS element analysis; and the porous structure of the crosslinked polysulfate allows same to be provided with improved application prospect in terms of adsorption.

The invention belongs to the technical field of separation composite membranes, and particularly relates to a preparation method and application of an LDH nanometer network auxiliary polyamide nanofiltration membrane, and the preparation method of the LDH nanometer network auxiliary polyamide nanofiltration membrane comprises the following steps: (1) carrying out regional sealing coating on a porous base membrane by using a coating; (2) obtaining a precursor solution, and then immersing the porous base membrane in the precursor solution for reaction to obtain an LDH membrane; (3) cleaning and soaking the LDH film by using an organic solvent, and drying the LDH film to obtain a dried LDH film; (4) under a vacuum condition, immersing the dried LDH film into a mixed aqueous solution of piperazine and LDH nanosheets for suction filtration, and drying to obtain an LDH net film; and (5) immersing the LDH net membrane into a trimesoyl chloride n-hexane solution to carry out polymerization reaction, washing and drying to obtain the LDH nano-network assisted polyamide nanofiltration membrane. The nanofiltration membrane obtained by the invention is relatively large in water flux and high in rejection rate, and can be widely applied to the field of water treatment.

The application discloses a preparation method of a hydrophilic oil-water separation anti-pollution membrane and the anti-pollution membrane and application thereof, and prepares MNRs material; the MNRs material is dispersed in dimethylacetamide, is uniformly stirred, polyvinylpyrrolidone is added, and stirring is continued, and a first mixture is obtained through ultrasonic treatment; the first mixture is mixed with polyvinylidene fluoride to obtain a second mixture, and the second mixture is stirred; the treated second mixture is dip-coated on a carrier, the dip-coated carrier is treated in deionized water to obtain an ultrafiltration membrane; the ultrafiltration membrane is soaked in a tea polyphenol solution with a Tris-HCl buffer solution, and is shaken to obtain the hydrophilic oil-water separation anti-pollution membrane. The hydrophilic oil-water separation anti-pollution membrane has excellent separation efficiency and flux recovery rate for four different oil-water mixtures of kerosene, gasoline, edible oil and n-hexane. The preparation process of the oil-water separation membrane is simple, the cost is low, and the reaction condition is mild; when the oil-water separation membrane is applied to organic wastewater separation, the oil-water separation membrane has the advantages of high efficiency, good removal performance and good recycling performance.

The application discloses a preparation method of a catalyst for liquid-phase refining of crude octanol, and the preparation method comprises the following steps: (1) mixing pretreated fly ash and pseudo-boehmite, adding deionized water and nitric acid, stirring until a colloid is formed, drying the colloid, mixing the dried colloid with kaolin, and obtaining a carrier through kneading, extrusion molding, drying and calcination; (2) taking a nickel salt, a manganese salt and a zinc salt as active components, taking a calcium salt as an auxiliary component, dissolving the active components and the auxiliary component in deionized water to obtain a salt solution, adding n-hexane into the salt solution and stirring uniformly to prepare an impregnation solution, immersing the carrier in the impregnation solution, and obtaining the catalyst through washing, drying and calcination. The catalyst prepared by the method is mainly used in a liquid-phase refining reaction process of crude octanol, and has high activity stability and selectivity.

The invention provides a method for preparing aluminum oxide-silicon oxide composite aerogel through normal-pressure drying. The method comprises the following steps: respectively preparing silica sol and aluminum sol by taking tetraethoxysilane as a silicon source and aluminum chloride hexahydrate as an aluminum source, mixing the silica sol and the aluminum sol, heating and stirring to obtain mixed sol, adding epoxypropane into the mixed sol, and standing until the sol does not flow to obtain composite gel; soaking the composite gel in ethanol and normal hexane in sequence for aging and solvent exchange; and uniformly mixing a modifier, a catalyst and a solvent to prepare a modification solution, soaking the composite gel in the modification solution for modification, and then washing and drying through normal hexane to obtain the aluminum oxide-silicon oxide composite aerogel. According to the preparation method, inorganic aluminum chloride hexahydrate is used as an aluminum source, trimethylethoxysilane is used as a modifier, and the aluminum oxide-silicon oxide composite aerogel is prepared through normal-pressure drying. The prepared aluminum oxide-silicon oxide composite aerogel still has a mesoporous structure and a high specific surface area after being subjected to high-temperature heat treatment.

The invention belongs to the technical field of flame retardants, and particularly relates to a preparation method of bromotriazine, which comprises the following steps: adding phenol and deionized water into a reaction container, dropwise adding hydrogen peroxide and liquid bromine into a reaction system in a staggered manner, and adding a catalyst; after the reaction is finished, separating the catalyst, firstly carrying out quenching treatment on the filtrate, then carrying out extraction treatment, and carrying out reduced pressure distillation on the extracted organic phase to obtain tribromophenol; dissolving the prepared tribromophenol in dichloromethane, adding triethylamine and tetrabutylammonium bromide, stirring to form a homogeneous system, adding cyanuric chloride into the homogeneous system, and regulating and controlling the pH in stages; concentrating the organic phase which is washed to be neutral, adding n-hexane to initiate primary nucleation, dropwise adding ethyl acetate to adjust the polarity of the solvent, and promoting crystal growth; and filtering and drying in vacuum to obtain the bromo-triazine. Through staged pH / temperature regulation and control, the composite catalyst system realizes efficient synthesis of bromotriazine.

The invention provides a separation and detection method of a cis-isomer in olotinib. According to the method, chiral chromatographic column high performance liquid chromatography is adopted, cellulose derivative bonded silica gel is taken as a stationary phase, and n-hexane and ethanol are taken as a mobile phase. The method provided by the invention can effectively separate and measure the cis-isomer in the olotinib, and has the advantages of high efficiency, simplicity, convenience, high sensitivity, good separation effect and separation degree of 5.42. The invention provides a detection method for developing and marketing the olatinib and accurately detecting the cis-isomer in the olatinib, and ensures the product quality.