443 results about "Triflic acid" patented technology

The invention provides a metallized film for a capacitor, a preparation method of the metallized film and the capacitor, and relates to the technical field of capacitor manufacturing. The preparation method of the metallized film comprises the following steps: preparing an inorganic reinforcing material from raw materials including 1, 4-phthalaldehyde, zirconium diboride and tetraethoxysilane; the preparation method comprises the following steps: preparing a modified polypropylene material from raw materials including 4, 4 '-diaminobiphenyl, triphenyl phosphate, an ethylene-1-octylene copolymer, polyethylene and polypropylene; raw materials including polyvinyl alcohol, a silane coupling agent, N-hydroxynaphthalimide trifluoromethanesulfonic acid, an inorganic reinforcing material and a modified polypropylene material are subjected to melt mixing, casting piece forming and two-way stretching, and a base film is obtained; applying a polyester coating on the base film, and carrying out irradiation treatment on the base film by adopting an electron beam and an ultraviolet light source to obtain a modified base film; a metal layer is formed on the modified base film through vacuum evaporation, and the metallized film is obtained. The metallized film obtained by the invention has good thermal stability and mechanical properties.

The invention belongs to the technical field of lithium battery materials, and particularly relates to a lithium trifluoromethanesulfonate in-situ doped graphdiyne composite material and a preparation method and application thereof. The preparation method of the lithium trifluoromethanesulfonate in-situ doped graphdiyne composite material adopts a one-step in-situ synthesis method, and specifically comprises the following steps: adding hexaacetylene benzene and lithium trifluoromethanesulfonate into a solvent, mixing, adding a catalyst, carrying out a heating reaction, and carrying out post-treatment on the obtained reactant to obtain the lithium trifluoromethanesulfonate in-situ doped graphdiyne composite material. Finally, the lithium trifluoromethanesulfonate in-situ doped graphdiyne composite material is obtained. The preparation method of the lithium trifluoromethanesulfonate in-situ doped graphdiyne composite material provided by the invention is simple in process, the prepared composite material is good in interface stability, and when the composite material is applied to a negative electrode of a lithium ion battery, the electrochemical performance of the battery can be improved, and the service life of the battery can be prolonged.

The invention relates to the technical field of cables, and provides a long-life cable for nuclear power, which sequentially comprises a conductor, an insulating layer, a shielding layer and a sheath layer from inside to outside, the sheath layer comprises the following components in parts by weight: 60-70 parts of high-density polyethylene, 12-22 parts of carboxy nitrile rubber, 4-8 parts of a styrene-acrylonitrile copolymer, 0.5-8 parts of a copper metal organic complex, 8-15 parts of palygorskite powder, 2-5 parts of zinc oxide, 0.5-1.3 parts of an antioxidant, 1-3 parts of a plasticizer and 0.2-0.5 part of a vulcanizing agent; the copper metal organic complex comprises copper trifluoromethanesulfonate and copper acetylacetonate in a weight ratio of (1-3): 1. According to the technical scheme, the problem of poor aging resistance of the sheath layer of the nuclear power cable in the prior art is solved.

The invention belongs to the field of membrane materials, and particularly relates to a polyether-based block copolymer and a preparation method and carbon capture application thereof. According to the invention, dichloromethane is taken as a solvent, trifluoromethanesulfonic acid is taken as an initiator, and in the presence of a chain transfer agent ethylene glycol, 1, 3-dioxolane is subjected to cationic ring-opening polymerization to generate PDXL (HO-PDXL-OH) of which two terminal groups are hydroxyl groups. Further, N, N-dimethylformamide is used as a solvent, dibutyltin dilaurate is used as a catalyst, and HO-PDXL-OH and diphenylmethane diisocyanate are subjected to polycondensation to synthesize block copolymer polyurethane (PU). The polyether-based segmented copolymer prepared by the preparation method disclosed by the invention is used as a gas separation membrane material and has relatively high CO2 capture performance, and the CO2 separation performance of the polyether-based segmented copolymer is superior to that of other polyether-based membrane materials and is close to the Robeson upper limit.

The invention provides a low-temperature sodium ion electrolyte and a preparation method and application thereof, the low-temperature sodium ion electrolyte comprises a sodium salt, an organic solvent and an additive, the additive is triisopropyl silyl trifluoromethanesulfonate, and the sodium salt is sodium trifluoromethanesulfonate. Triisopropyl silyl trifluoromethanesulfonate molecules are used as an electrolyte additive for the low-temperature sodium ion electrolyte, so that further decomposition of sodium salt in the electrolyte can be effectively promoted, stable SEI containing more sodium fluoride is formed to promote mass transfer of sodium ions at low temperature, and finally, a sodium ion battery can effectively circulate at low temperature.

The invention discloses a method for synthesizing a dichloroacetyl compound, which comprises the following steps: tetrachloroethylene and an acid are subjected to an addition reaction at 100-200 DEG C to obtain an adduct, then the adduct is subjected to an acidolysis, hydrolysis or alcoholysis reaction to obtain the dichloroacetyl compound, the acid for the addition reaction is at least one of sulfuric acid, trifluoromethanesulfonic acid, methanesulfonic acid and phosphoric acid, and the acid for the alcoholysis reaction is at least one of sulfuric acid, trifluoromethanesulfonic acid, methanesulfonic acid and phosphoric acid. The molar ratio of the tetrachloroethylene to the acid is 1: (1-10). By controlling the types of acids and increasing the temperature of the addition reaction, the addition reaction of tetrachloroethylene and acids in the absence of a catalyst is realized. Double bonds of tetrachloroethylene and hydrogen protons are subjected to an addition reaction in a strong acid environment to form a cationic intermediate, then the cationic intermediate is combined with acid radical anions to form an adduct, and the adduct intermediate is high in activity, unstable and free of separation and can be directly subjected to a hydrolysis reaction, an acidolysis reaction or an alcoholysis reaction with another substrate (such as water, acid or alcohol) respectively. The synthesis of dichloroacetyl series compounds is realized, and the route has universality and diversity.

The preparation method comprises the following steps: carrying out acid-catalyzed polymerization on p-terphenyl and a ketone monomer under the action of a first organic solvent and trifluoromethanesulfonic acid, and precipitating, filtering, washing and drying a reaction product to obtain a first polymer; carrying out quaternization reaction on the first polymer and quaternary ammonium salt under the action of a second organic solvent, cooling to room temperature, and adding 1, 6-hexamethylenediamine to obtain a second polymer solution; and coating a substrate with the second polymer solution, and carrying out drying membrane formation, heat treatment and hydroxyl anion exchange to obtain the cross-linked hydroxyl ion exchange membrane. The preparation method disclosed by the invention is simple and suitable for large-scale production, and the prepared anion exchange membrane has high ionic conductivity, excellent dimensional stability and mechanical property and relatively good machinability and application potential, and has a good application prospect in a water electrolysis hydrogen production technology.

The invention relates to a BIPB synthesis method, which is characterized by comprising the following steps: S1, raw material feeding: adding tert-butyl hydroperoxide into a reaction flask, adding di-(2-hydroxyisopropyl) benzene under a stirring condition, fully reacting, and adding trifluoromethanesulfonic acid; step S2, condensation reaction: after the trifluoromethanesulfonic acid is completely added and fully reacts, adding water to terminate the reaction, and standing after stirring at controlled temperature; s3, post-treatment alkali washing: separating the reaction liquid after standing, retaining an upper organic phase, sequentially carrying out alkali washing and water washing on the organic phase, discharging reaction wastewater in a layered manner, retaining the upper organic phase, pouring out the organic phase, cooling, solidifying the organic phase, and crushing to obtain a finished product. Compared with the prior art, the preparation method has the advantages that trifluoromethanesulfonic acid is used as the catalyst, no auxiliary means are needed, side reactions and harmful substances generated by reaction of sulfuric acid, sodium perchlorate and the like are avoided, higher-quality BIPB can be obtained, the yield of BIPB is increased, the preparation method is safer and more environmentally friendly, and the cost is greatly reduced.

The invention discloses a synthesis process of chiral cyclic ether indole. The synthesis process comprises the following steps: reacting 4-bromobenzaldehyde with malonic acid under the catalysis of piperidine to generate olefin carboxylic acid CHP-1; carrying out condensation reaction to prepare CHP-2; under the catalysis of a copper reagent, carrying out Michael addition reaction to obtain CHP-3; preparing a chiral alcohol intermediate CHP-4 through a reduction reaction; trifluoromethanesulfonic acid is used, and a chiral ether intermediate CHP-5 is prepared through ring closing; reacting with protected hydrazine by using a copper ion catalyst to obtain an intermediate CHP-6; the method comprises the following steps: by taking alcohol as a solvent, adding strong acid, and removing a protecting group of hydrazine to obtain an intermediate CHP-7; and carrying out ring closing by taking lewis acid as a catalyst to obtain an indole product CHP-8. The use of a noble metal catalyst palladium is avoided, and the cost is greatly reduced. The chiral center is directly constructed through a chemical method, and SFC is not needed for resolution, so that the cost is remarkably reduced, and industrial production is successfully realized.

The invention discloses a sodium ion battery conductive agent and a preparation method thereof, and belongs to the technical field of sodium ion batteries. The sodium ion battery conductive agent comprises a hyperbranched polymer and a carbon-based conductive material, the hyperbranched polymer catalyzes 2-thiophenecarbonitrile through trifluoromethanesulfonic acid to generate 2, 4, 6-tri (2-thienyl)-1, 3, 5-triazine through polymerization, then aldehyde groups are introduced to prepare thienyl triazinyl formaldehyde, and the thienyl triazinyl formaldehyde reacts with 2, 4, 6-tri (4-aminophenyl)-1, 3, 5-triazine to prepare the sodium ion battery conductive agent. A triazine structure in the hyperbranched polymer in the conductive agent prepared by the invention is cooperated with a thiophene unit, so that the conjugation effect and the electron transmission efficiency can be remarkably enhanced; the flexible and hyperbranched structure of the thiophene ring can buffer volume expansion in the charging and discharging process, and the cycle performance is prolonged; the hyperbranched polymer can be effectively cross-linked with the carbon-based conductive material to form a multi-path transmission channel, so that the charging specific capacity of the battery is improved.

This invention belongs to the field of chemical synthesis and relates to a method for achieving deuterated methylation of a nucleophile. The invention provides a deuterated methylating reagent, which is obtained by reacting formic acid with deuterated methanol under acidic conditions, followed by a second reaction with thiaanthracite and trifluoromethanesulfonic acid. The nucleophile is then reacted with the deuterated methylating reagent described in claim 1, a base, and a solvent to obtain the deuterated methylated product. This invention also provides a method for achieving deuterated methylation of a nucleophile, which involves dissolving the nucleophile and 5-deuterated methyl-5H-thiophene-5-onium trifluoromethanesulfonate in a suitable solvent, adding a base, and then performing the deuterated methylation reaction at room temperature. In the method provided by this invention, the yield of the product after nucleophile methylation can reach 52% to 95%.

An electrolyte, a sodium secondary battery and an electric device. The electrolyte comprises a first sodium salt and a first solvent, wherein the first sodium salt comprises sodium trifluoromethanesulfonate, and the first solvent has a structure as shown in formula I, with the mass ratio of the first sodium salt to the first solvent being 0.01-0.4. The electrolyte has a good low-temperature ionic conductivity, which is beneficial for improving the low-temperature cycling performance and low-temperature coulombic efficiency of the battery.

Provided is a method for producing a protected glycoside derivative, including reacting a sugar in which all hydroxyl groups of the sugar are protected by protective groups and protective groups of a hydroxyl group at a 1-position and a hydroxyl group at a 2-position are acyl groups, with a phenolic compound in the presence of at least one catalyst selected from the group consisting of trifluoromethanesulfonic acid and copper (II) trifluoromethanesulfonate, in which the phenolic compound is bonded to an anomeric position of the sugar and other hydroxyl groups of the sugar are protected.

The invention discloses a sodium-philic current collector and a negative-electrode-free sodium ion battery comprising the same. According to the sodium-philic current collector, carbon-coated aluminum foil is subjected to nitrogen plasma treatment, nitrogen doping sites are formed on a carbon-coated layer, the affinity to sodium can be enhanced, and uniform deposition of sodium is promoted; according to the electrolyte, a cosolvent of diethylene glycol dimethyl ether and tetraethylene glycol dimethyl ether is adopted, sodium hexafluorophosphate, sodium tetrafluoroborate and sodium trifluoromethanesulfonate are compounded, (3-fluorophenyl)-oxoacetonitrile and allyl methyl carbonate are added to serve as electrolyte additives, a weak solvation structure is formed, a solid electrolyte interfacial film rich in boron and fluorine is constructed, and side reactions are inhibited; sodium oxalate is added to the positive electrode as a sodium supplementing agent to make up the loss of active sodium caused by low first charge-discharge efficiency. The invention solves the problems of low first charge-discharge efficiency and poor dendritic crystal growth and cycle stability of the non-anode sodium ion battery, has high energy density and process simplicity, and is suitable for large-scale production.

The present application provides a lubricating additive, comprising the following components of the raw material: 20 to 40 parts by weight of an ester compound, the ester compound is selected from one or more of di(2-ethylhexyl) adipate, diisobutyl adipate, diheptyl adipate, diisononyl adipate, diisodecyl adipate, dimethyl sebacate, dibutyl sebacate and di(2-ethylhexyl) sebacate; 5 to 15 parts by weight of a fluorine-containing ion salt, the fluorine-containing ion salt is selected from one or more of lithium di(trifluoromethanesulfonyl)imide, lithium trifluoromethanesulfonate and lithium tetrafluoroborate; 1 to 5 parts by weight of an alkyl phthalate. The lubricating additive has good dispersibility in base oil, and the prepared conductive grease has good electrical conductivity and friction reduction and anti-wear properties. It is used in electrical equipment to have lubrication, friction reduction and antistatic effects, can reduce the failure frequency of equipment, extend the service life of equipment, and improve production efficiency and safety.

The invention discloses an electrolyte containing a redox medium as well as preparation and application of the electrolyte. The positive electrode electrolyte and the negative electrode electrolyte comprise tetravalent or trivalent vanadium ions, mixed acid, an iron ion additive and water, the iron ion additive is composed of iron phthalocyanine and a second iron-containing compound, and the second iron-containing compound comprises at least one of ferric acetylacetonate, heme iron and iron trifluoromethanesulfonate. The preparation method comprises the following steps: activating vanadium pentoxide in mixed acid, adding water to obtain a mixed solution, and adding a reducing agent into the mixed solution to react to obtain an initial mother solution; adding an iron ion additive into the initial mother solution, and uniformly mixing to obtain a positive electrode electrolyte; and electrolyzing the initial mother liquor to obtain electrolyte containing trivalent vanadium ions, adding an iron ion additive into the electrolyte, and uniformly mixing to obtain the negative electrode electrolyte. The charge-discharge polarization is reduced by using a small amount of iron ion additive containing iron phthalocyanine; the capacity fading caused by pentavalent vanadium precipitation is released; and the energy efficiency and the cycling stability of the battery are improved.

The invention discloses a method for preparing polycaprolactone by ring-opening polymerization, and aims to provide a method for preparing polycaprolactone by ring-opening polymerization with the advantages of high catalytic activity, mild conditions, simple process and the like. The method uses ε-caprolactone as a monomer and trifluoromethanesulfonate metal as a catalyst, and prepares polycaprolactone by a bulk polymerization method under the condition that the reaction temperature is 100-160 DEG C. The invention uses trifluoromethanesulfonate metal as a catalyst for the polymerization preparation of ε-caprolactone, and belongs to the technical field of polymer organic synthesis.

The invention relates to the technical field of fine chemical engineering, in particular to a preparation method of methyl trifluoromethanesulfonate, which comprises the following steps: adding trifluoromethanesulfonic acid into a reaction kettle, adding a catalyst 4-dimethylaminopyridine under the conditions of cooling and stirring, and continuously stirring to obtain a pre-reaction system; raising the temperature, dropwise adding dimethyl carbonate, and after dropwise adding is completed, continuously reacting to obtain a mixed solution containing a product methyl trifluoromethanesulfonate; standing and layering to obtain an organic phase and a water phase; taking an organic phase, rectifying at normal pressure, and collecting fractions to obtain a product methyl trifluoromethanesulfonate; and taking a water phase, carrying out reduced pressure distillation, removing water, and recovering the catalyst. 4-dimethylaminopyridine is used as a catalyst to catalyze trifluoromethanesulfonic acid to react with dimethyl carbonate to prepare methyl trifluoromethanesulfonate. Compared with the prior art, the method has the advantages that steps and devices are simple, the used catalyst is low in toxicity and small in dosage, no organic solvent is used, and harm to human health is reduced.

The application belongs to the field of fine chemical industry and environmental protection, and particularly relates to a method for preparing metal triflate by using high gravity reaction. The method comprises the following steps: 1, using trifluoromethylsulfonyl chloride and anhydrous HF gas as raw materials to generate trifluoromethylsulfonyl fluoride gas; 2, performing gas-liquid contact reaction of the trifluoromethylsulfonyl fluoride gas with an alkali metal solution to obtain a mixed solution; 3, performing solid-liquid separation on the mixed solution by using a filter press, and the liquid phase is a triflate salt solution; 4, drying the triflate salt solution by using a spray dryer to obtain a solid-phase product triflate salt. The method uses trifluoromethylsulfonyl chloride and anhydrous HF as raw materials to replace triflic acid in the traditional method, and utilizes high gravity reaction, so that the production cost is greatly reduced. The process is simple, the obtained product triflate metal salt has low impurity content, is superior to the industry standard, the process is zero emission, and has good economic value and social value.

The invention belongs to the field of drug mutagenesis impurity detection and analysis, and relates to a method for detecting impurities of trifluoromethanesulfonate, in particular to a method for detecting impurities of methyl trifluoromethanesulfonate and ethyl trifluoromethanesulfonate. Specifically, according to the detection method disclosed by the invention, tetrabutylammonium bromide is used as a derivatization reagent to derivatize trifluoromethanesulfonate, a corresponding derivative halogenated alkane is detected by GC-MS (Gas Chromatography-Mass Spectrometer), and then the content of trifluoromethanesulfonate is determined. The method provided by the invention solves the problem that the detection result may have false negative in the prior art, and has the advantages of high sensitivity, low detection limit, good repeatability and high accuracy, and all substances can be well separated.

The invention provides an electrolyte of a negative-electrode-free sodium-ion battery, an application of the electrolyte and the negative-electrode-free sodium-ion battery, and relates to the technical field of batteries. The electrolyte of the negative-electrode-free sodium ion battery provided by the invention comprises the following components in percentage by mass: 1%-3% of trifluoromethanesulfonic acid metal salt, 14%-20% of NaPF6, 10%-20% of a cosolvent and the balance of a solvent. According to the electrolyte, the potential barrier of sodium nucleation is reduced, the deposition of sodium on the negative electrode side is promoted, the uniformity of sodium deposition is improved, the contact and reaction between sodium and the electrolyte are reduced, and the battery performance is improved; the trifluoromethanesulfonate ions have relatively high transference number and conductivity and can promote rapid transmission of sodium ions in an electrolyte, so that the charge-discharge efficiency and the rate capability of the battery are improved, meanwhile, the trifluoromethanesulfonate ions are easy to form a film at a negative electrode, a stable SEI film rich in F / S can be constructed, generation of dendritic crystals is inhibited, and the safety performance of the battery is improved.

The invention discloses a semi-interpenetrating network polymer solid electrolyte as well as a preparation method and application thereof. Comprising the following components in parts by mass: 60-100 parts by weight of a polymer binder, 20-40 parts by weight of polyarylpiperidine and 10-150 parts by weight of a lithium salt, the structural formula of the polyarylpiperidine is shown in the specification, X <-> is halogen and / or bis (trifluoromethanesulfonic acid) imine (TFSI <->), and X <-> is halogen and / or bis (trifluoromethanesulfonic acid) imine (TFSI <->). And m and n are 0-100. The preparation method of the semi-interpenetrating network polymer solid electrolyte provided by the invention is simple, and the semi-interpenetrating network polymer solid electrolyte has relatively high specific capacity and excellent cycling stability and is suitable for large-scale production.

The invention belongs to the technical field of polymer materials, and particularly relates to a conductive polymer material as well as a preparation method and application thereof. The conductive polymer material is prepared from the following components in parts by weight: 0.1 to 5 parts of ionic liquid, 0.1 to 10 parts of filler and 1 to 100 parts of polymer, the ionic liquid comprises at least one of organic salt and metal salt; the organic salt comprises at least one of p-toluenesulfonic acid triethylamine salt, p-toluenesulfonic acid tripropylamine salt, trifluoromethanesulfonic acid triethylamine salt and trifluoromethanesulfonic acid tripropylamine salt; the metal salt comprises at least one of potassium trifluoromethanesulfonate and sodium trifluoromethanesulfonate. The conductive polymer material prepared by the invention has the advantages of excellent conductivity, high transparency, good water resistance, good mechanical properties, good environmental stability, strong thermal stability and strong self-repairing ability.

The application discloses a triazine ring synthesis method, and belongs to the technical field of medical intermediate synthesis. The method is characterized in that 2-methylaminothiourea and dimethyl oxalate are used as raw materials, a nanometer catalyst of scandium triflate (Sc(OTf)3) or ytterbium triflate (Yb(OTf)3) is loaded on magnetic Fe3O4@SiO2, a cyclization reaction is carried out in an organic solvent, the catalyst is separated and recovered through an external magnetic field after the reaction is completed, and high-purity triazine rings are obtained through acidification, crystallization and drying of the reaction liquid. The catalyst has the advantages of high specific surface area, high catalytic activity, easy magnetic separation and recovery, and can be reused more than 6 times. The product yield can reach 93% to 96%, and the purity is greater than or equal to 99.6%. The method realizes green, efficient and low-cost synthesis of triazine rings.

The invention discloses a 3-imido-4, 5-diaryl boron oxygen heterocyclic ring onium salt derivative as well as a preparation method and application of the 3-imido-4, 5-diaryl boron oxygen heterocyclic ring onium salt derivative. The 3-imido-4, 5-diaryl boron oxygen heterocycle onium salt derivative is prepared by taking acetylenic ketone potassium fluoborate, organic amine and 2-(trimethylsilyl) phenyl trifluoromethanesulfonate as raw materials, inorganic alkali and a weak acid buffer as accelerators and water and acetonitrile as solvents through a one-pot two-step reaction, and the compound can be used for preparing organic fluorescent materials, such as organic fluorescent materials, organic fluorescent materials, organic fluorescent materials, organic fluorescent materials, organic fluorescent materials and organic fluorescent materials. The compound has obvious aggregation-induced emission (AIE) property, high quantum yield and wider fluorescence range. The target product is prepared with high atom economy reaction and high yield, and the method has the advantages of cheap and easily available raw materials, mild reaction conditions, short synthetic route, wide universal range of substrates and the like.

The application discloses a low-temperature-resistant electrolyte for alkaline batteries and a preparation method thereof, and relates to the technical field of electrolytes. The application comprises the following raw materials in mass fraction: glycerol triacetate 11-13 parts, potassium hydroxide aqueous solution 100-150 parts, fluorine-containing additive 1-5 parts, and organic dispersion 21.3-28 parts; the organic dispersion is prepared from ethylene glycol, tetrabutylammonium trifluoromethanesulfonate, hybrid nanosheet and glycerol triacetate. The hybrid nanosheet prepared from hexagonal boron nitride, cerium ammonium nitrate, urea and polyethylene glycol 400 effectively improves the ion conductivity and cycle stability maintenance rate of the electrolyte at low temperature. The introduction of the components such as glycerol triacetate and fluorine-containing additive in the application further improves the performance maintenance rate of the electrolyte at low temperature, and simultaneously reduces the viscosity of the electrolyte at low temperature. Therefore, the application has a more extensive application prospect.

This invention provides a method for preparing high-purity imidazole ionic liquids, comprising the following steps: S1: 1-Ethyl-3-methylimidazolium chloride, sodium trifluoromethanesulfonate or sodium bis(trifluoromethanesulfonyl)imide, and glycerol solvent are added sequentially to a reactor, followed by stirring and reaction; S2: After the reaction is completed, stirring is turned off, and the resulting crude 1-ethyl-3-methylimidazolium ionic liquid and glycerol mixture are filtered and collected in a separator, with sodium chloride retained in the reactor and subsequently discharged; S3: Pure water is added to the separator, and the separator is stirred for a certain period of time before settling and separation; S4: The two phases in the separator are separated by a separator and then enter their respective purification devices; S5: The crude 1-ethyl-3-methylimidazolium ionic liquid is dehydrated by vacuum distillation to obtain the product; S6: The water and glycerol mixture is distilled under reduced pressure to obtain a reusable aqueous phase and a glycerol phase. This invention yields a product with a purity of over 99.5%; the solvents glycerol and water are reused after distillation. This method is simple, has a yield of over 94%, and is easy to implement in large-scale production.

The invention provides a photocatalytic method for degrading polystyrene into benzoic acid, which comprises the following steps: dissolving polystyrene in a mixed solvent containing acetonitrile and chlorobenzene, adding a catalyst FPQL-OMe and iron trifluoromethanesulfonate, and reacting under the conditions of oxygen atmosphere and illumination to generate benzoic acid, wherein the FPQL-OMe and the iron trifluoromethanesulfonate are synergistically used as a photocatalyst. The invention provides a method for photocatalytic degradation of polystyrene, which is mild in condition, rapid, efficient and high in selectivity, and particularly provides a photocatalytic method for degrading and converting polystyrene into benzoic acid at a relatively high yield.

The invention discloses a (2-phenoxyphenyl) phenyl sulfide compound and a synthesis method thereof, comprising the following steps: placing a 3-(phenylsulfinyl) tert-butyl propionate compound and a 2-(trimethylsilyl) phenyl trifluoromethanesulfonate compound in a 10 mL Shrek tube under an argon atmosphere, adding cesium fluoride and then adding a solvent, acetonitrile, and reacting at room temperature for 6 hours; after the reaction is completed, extraction, chromatographic separation, and drying are performed to obtain the target product. The present invention only uses cheap and readily available cesium fluoride as a fluorine source, and can efficiently obtain aryl sulfide compounds under mild conditions without the participation of a transition metal catalyst. The method provides a new approach for preparing various functionalized aryl sulfide compounds.

A quinazolinone catalyst with both N-N and C-C axis chirality and its synthesis method and application, its chemical structural formula is shown in Formula 4; Synthesis method: using indole-derived o-aminobenzamide and 1-naphthaldehyde derivative as raw materials, using molecular sieve as dehydrating agent, bromobenzene as reaction solvent, stirring for 4h under the catalysis of chiral phosphoric acid and 10°C, then adding ethyl acetate, 2,3-dichloro-5,6-dicyano-1,4-benzoquinone, stirring for 10h under room temperature, TLC tracking reaction to complete formula 3 compound; using formula 3 compound, phenylsilane, trifluoromethanesulfonic acid as raw materials, adding toluene, stirring reaction under 100°C, TLC tracking reaction to end to obtain formula 4 compound. The catalyst prepared by the present invention can be used as a chiral ligand in transition metal-catalyzed asymmetric allylation reaction, with excellent stereoselectivity control effect; the method has mild reaction conditions, low cost and high enantioselectivity.