619 results about "Carbonate ester" patented technology

The invention discloses a preparation method and application of a catalyst based on pyridine ionic liquid, and belongs to the technical field of catalyst preparation. According to the invention, a hydrolysis reaction of a silane coupling agent is utilized to prepare a silicon oxide nanotube containing a pyridine unit, and then a quaternization reaction is carried out to obtain the catalyst based on the pyridine ionic liquid. The catalyst has a high specific surface area and a rich pore channel structure, exposure of active sites and contact of the active sites and reactants are facilitated, and the catalytic rate is increased. Meanwhile, the silicon oxide nanotube contains hydroxyl, and can cooperate with a pyridine ionic liquid site to catalyze a carbon dioxide cycloaddition reaction. The obtained catalyst can catalyze the reaction of carbon dioxide and an epoxy compound to prepare cyclic carbonate under solvent-free and metal-free conditions, and the catalyst is easy to recover and simple in product purification, and has a good application prospect.

The invention relates to the technical field of biodegradable high polymer materials, in particular to a tear-resistant high-barrier biodegradable mulching film and a preparation method thereof, and the tear-resistant high-barrier biodegradable mulching film is prepared from the following raw materials in parts by weight: 60-90 parts of poly (butylene adipate-co-terephthalate); 10 to 40 parts of poly (propylene carbonate); 0.5-5 parts of a plasticizer; 0.05 to 0.3 part of a cross-linking agent; 0.1 to 10 parts of talcum powder; 0.1 to 2 parts of a lubricant; 0.1-1 part of an anti-blocking agent; 0.1 to 1 part of an antioxidant; 0.1 to 1 part of an anti-ultraviolet agent; 0.1-1 part of a light stabilizer; 0.1 to 1 part of an anti-hydrolysis agent; 0.1-1 part of a nucleating agent; the plasticizer is poly (1, 2-propylene glycol adipate); and the cross-linking agent is 1, 4-bis (tert-butylperoxy) diisopropyl benzene. The film has good mechanical properties and water vapor transmission amount, can be completely biodegraded, and has good aging resistance.

This invention relates to a retardation film comprising: an A layer having a slow axis, and a B layer having a slow axis at an angle of 85° to 90° to the slow axis of the A layer; the A layer is formed of a resin A having positive intrinsic birefringence; the B layer is formed of a resin B having negative intrinsic birefringence; the resin B comprises polyester, polycarbonate, or polyester carbonate, wherein the polyester, polycarbonate, or polyester carbonate contains a fluorene framework; the overall in-plane retardation of the A layer and the overall in-plane retardation of the B layer satisfy a specific relationship; the in-plane retardations Re(450) and Re(550) of the retardation film at wavelengths of 450 nm and 550 nm satisfy a specific relationship; the overall thickness T of the A layer... A The overall thickness T of layer B B The ratio of T A / T B It ranges from 30 / 70 to 65 / 35.

A glass fiber-reinforced thermoplastic polymer composition comprising a sheathed continuous multifilament strand comprising a core that extends in the longitudinal direction and a polymer sheath which intimately surrounds said core, wherein the core comprises an impregnated continuous multifilament strand comprising at least one continuous glass multifilament strand, wherein the at least one continuous glass multifilament strand is impregnated with an impregnating agent, wherein the polymer sheath consists of a thermoplastic polymer composition comprising a thermoplastic polymer, wherein the impregnating agent comprises at least one of an aromatic phosphate ester, polyphosphonate, poly(phosphonate-co-carbonate).

The present invention relates to a method of preparing a heterogeneous linear carbonate, the method including performing a transesterification reaction of dimethyl carbonate (DMC) and ethanol (EtOH) in the presence of a catalyst, wherein the catalyst is one or more selected from the group consisting of lithium methoxide (LME), lithium ethoxide (LEE), sodium methoxide (SME), sodium hydroxide (NaOH), and a mixture thereof, and the catalyst is input in a state of being dissolved in a sulfoxide-based solvent.

The present invention relates to a polycarbonate composition comprising the following components, relative to the total weight of the composition A) 63-81 wt. % of an aromatic polycarbonate,B) 13-20 wt. % of a phosphorus flame retardant,C) 4-12 wt. % of impact modifiers containing 1-7 wt. % of a first impact modifier and 1-7 wt. % a second impact modifier, wherein the first impact modifier is acrylonitrile-butadiene-styrene, and the second impact modifier is selected from methyl methacrylate-butadiene-styrene and silicone-acrylic rubber based impact modifiers,D) 1-6 wt. % of a mineral filler, andE) 0.05-0.09 wt. % of polytetrafluoroethylene.The present invention also relates to a shaped article made from the composition. The polycarbonate composition according to the present invention has a good combination of flame retardancy and impact strength.

The invention discloses an artificial SEI material and a preparation method and application thereof, and a battery rate capability evaluation method, the artificial SEI material comprises a polymer, the polymer is formed by polymerizing at least one cyclic carbonate monomer and at least one hydrophobic solvent type monomer, and the ionic conductivity of the artificial SEI material is 3 * 10 <-5 > S / cm to 7.2 * 10 <-5 > S / cm. The artificial SEI material is prepared by carrying out polymerization reaction on a cyclic carbonate monomer and a hydrophobic solvent type monomer. The high-polarity carbonyl functional group in the cyclic carbonate unit can selectively react with lithium ions, so that a solvation sheath is weakened, a desolvation energy barrier is reduced, and the transmission efficiency of the lithium ions is improved. And the hydrophobic solvent type monomer unit forms a polymer skeleton which is insoluble in the electrolyte, so that the chemical stability is ensured. The copolymer has high ionic conductivity and structural stability, and provides a material basis for improving the fast charging performance of the lithium ion battery.

The invention provides a preparation method of fluoride ether bacteria amide, which comprises the following steps: dissolving pentafluorobenzonitrile in a solvent, dropwise adding a sodium methoxide solution at-10-30 DEG C for 2-15 hours, continuing to carry out heat preservation reaction for 0.5-2 hours after dropwise adding, and carrying out post-treatment to obtain 2, 3, 5, 6-tetrafluoro-4-methoxybenzonitrile; the preparation method comprises the following steps: jointly dissolving 2, 3, 5, 6-tetrafluoro-4-methoxybenzonitrile, 3-chloro-5-(trifluoromethyl) pyridine-2-yl) methanol and a catalyst acid in a solvent, reacting at 50-110 DEG C for 5-32 hours, and performing post-treatment on the obtained reaction liquid to obtain fluoride ether bacteria amide, according to the method, sodium methoxide and pentafluorobenzonitrile which are low in price and easy to obtain are subjected to etherification reaction, thionyl chloride and bis (trichloromethyl) carbonate are not used, the green chemical principle is met, and the method has the advantages of being short in step, safe and easy to operate and the like, so that the method has high implementation value and practical production applicability.

The invention relates to the technical field of solid-state batteries, in particular to a solid-state polymer electrolyte, a preparation method of the solid-state polymer electrolyte, a positive pole piece, a solid-state lithium battery, a preparation method of the solid-state lithium battery and electric equipment. The solid polymer electrolyte is mainly prepared from a lithium salt, a carbonic ester monomer containing a carbon-carbon double bond and a monomer having a binding effect on anions in the lithium salt; the structural formula of the carbonic ester monomer is shown in the specification, wherein M is a group containing a carbonic ester group. According to the invention, a cooperative regulation strategy of a structure with a binding effect on anions in the lithium salt and the carbonate monomer is adopted, so that the limitation on the anions in the lithium salt is increased, the transference number of lithium ions can be increased, the highest occupied molecular orbital energy level of the whole polymer electrolyte is reduced, and an electrochemical stability window is widened.

This invention discloses a cross-linked copolymer coating for negative electrodes, its preparation method, and its application, relating to the field of solid-state battery negative electrode protection technology. The coating is formed by in-situ copolymerization of a precursor composition consisting of carbonate monomers with unsaturated double bonds, hydroxyl-rich natural polymer derivatives, lithium salts, and an initiator. The rigid cellulose skeleton in the copolymer regulates the degree of polymerization of the carbonate monomers through a hydrogen bond network, forming a protective layer with a rigid-flexible block structure, resulting in a uniform and dense SEI film. The hydrogen bond anchoring effect of high-density hydroxyl and carbonyl groups inhibits polycarbonate segment degradation and improves interfacial chemical stability. The three-dimensional hydrogen bond network endows the coating with excellent mechanical strength and flexibility, synergistically buffering volume changes and inhibiting lithium dendrite growth. This preparation process is simple and controllable, effectively reducing the probability of battery short circuits and improving safety performance and cycle stability.

The invention discloses efficient flame-retardant smoke-suppressing polyurethane and a preparation method thereof.The efficient flame-retardant smoke-suppressing polyurethane comprises a material A and a material B. The material A is prepared from liquid polyether macromolecular dihydric alcohol, liquid polyether macromolecular trihydric alcohol, polyether carbonate polyol, a chain extender, a catalyst, a hydroxylation flame-retardant smoke-suppressing agent and a surface functional ceramic forming auxiliary; the material B is prepared from castor oil and diisocyanate; wherein the hydroxylated flame-retardant smoke suppressant is formed by carrying out ion exchange reaction on ammonium polyphosphate, an ammonium molybdate smoke suppressant and an alcohol amine modifier, and the surface functional ceramic forming additive is obtained by carrying out self-polymerization on a polyphenol compound on the surface of the inorganic ceramic forming additive to form a polymer coating. According to the efficient flame-retardant smoke-suppression polyurethane provided by the invention, organic solvents such as DMF are not used in the preparation process, organic solvent pollution is eliminated from the source, the limit oxygen index of the prepared polyurethane is greater than 28%, and the prepared polyurethane passes a V-0 grade through a UL-94 vertical combustion test, is low in maximum smoke density and has excellent comprehensive properties such as mechanical properties.

The invention belongs to the technical field of electrolyte materials, and discloses a high-purity lithium bis (fluorosulfonyl) imide solution as well as a preparation method and application thereof. The preparation method of the high-purity lithium bis (fluorosulfonyl) imide solution comprises the following steps: 1) mixing inert chloralkane and lithium carbonate to form a suspension, dropwise adding bis (fluorosulfonyl) imide into the suspension at reaction temperature and pressure for reaction, after the reaction is finished, performing filter pressing, washing, and performing filter pressing again to obtain a filter cake; and 2) crushing the filter cake, feeding the crushed filter cake into a closed-loop circulating fluidized bed, sequentially drying in a low-temperature area and a medium-temperature area, instantaneously contacting and dissolving the obtained hot powder with an atomized and sprayed carbonate solvent to form a solution, and performing microfiltration to obtain the high-purity lithium bis (fluorosulfonyl) imide solution. The lithium bis (fluorosulfonyl) imide solution has ultra-high purity and ultra-low moisture, the content of other impurities such as chloride ions, free acids and metal ions is extremely low, additional steps of dehydration, purification or acidity adjustment and the like are not needed, and the lithium bis (fluorosulfonyl) imide solution can be directly used for preparing a high-performance lithium ion battery electrolyte.

Chemical processing techniques for removing colorant from polyester materials for recycling are described. According to an embodiment, a method for producing a purified polyester material, can comprise contacting a heated solution comprising a solvent to a polyester material as positioned within a vessel, wherein the polyester material comprises one or more additive components, and removing at least some of the one or more additive components from the polyester material as a result of the contacting, resulting in a transformation of the polyester material into the purified polyester material. In an example, the solvent comprises a ketone, an ether, an ester, an alcohol and / or a carbonate. The one or more additive components can include a colorant and / or other contaminates.

This invention belongs to the field of lithium-ion battery flame retardant technology, specifically relating to a flame-retardant electrolyte, its preparation method, and its application. The electrolyte comprises: lithium salt, carbonate organic solvent, co-solvent, and flame-retardant additive; the concentration of lithium salt in the electrolyte composed of lithium salt and carbonate organic solvent is 0.5–5 mol / L; the volume ratio of carbonate electrolyte to flame-retardant additive is 100:(1–30); the volume ratio of co-solvent to flame-retardant additive is (4–120):(1–5); the co-solvent is a solvent capable of dissolving the flame-retardant additive, and the flame-retardant additive is a perfluorohexane derivative. This invention proposes introducing a co-solvent that does not interact with lithium ions into the electrolyte. Through the bridging effect of the co-solvent, the insoluble flame retardant is introduced into the conventional electrolyte. The flame-retardant electrolyte prepared by this method does not deteriorate its electrochemical performance due to the addition of the flame retardant, thus solving the problem of incompatibility between the flame-retardant performance and electrochemical performance of lithium-ion battery electrolytes.

The invention discloses a chiral 1, 4-diazabicyclo [3.1. 1] heptane derivative as well as a synthesis method and application of the chiral 1, 4-diazabicyclo [3.1. 1] heptane derivative. According to the invention, a 1-azabicyclo [1.1. 0] butane derivative is taken as a raw material, under the catalytic action of a chiral iridium complex, the 1-azabicyclo [1.1. 1] butane derivative and an N-allyl carbonate derivative are subjected to [3 + 2] cycloaddition reaction, a series of chiral 1, 4-diazabicyclo [3.1. 1] heptane skeletons with diversified structures are constructed with high stereoselectivity, and the obtained product has the potential of further derivatization. The method has the advantages of easily available raw materials, mild reaction conditions, simplicity and convenience in operation, good functional group compatibility and the like.

The invention discloses a secondary battery, and belongs to the technical field of batteries, according to the secondary battery, carbonic ester, carboxylic ester and cyclic sulfate are introduced into an electrolyte, and meanwhile, the pore resistance of a negative pole piece and the content relation of the three components in the electrolyte are cooperatively regulated and controlled, so that the fast charging performance of the secondary battery can be effectively improved, and the service life of the secondary battery is prolonged. And meanwhile, the safety can also be considered.

The application provides a method for separating lithium salt and carbonate organic solvent from lithium battery waste electrolyte, belongs to the technical field of waste liquid comprehensive utilization, and is used for lithium ion battery production and lithium battery recycling processes, wherein part of waste electrolyte is generated, mainly containing carbonate organic solvent and lithium salt; the application first separates the carbonate and lithium salt by adopting thin film evaporation; after neutralization, the light component carbonate solvent enters a rectification system to realize the separation of carbonates, and various carbonate products meeting the national standard requirements are obtained; after high-temperature incineration cracking and removal of residual organic impurities, the heavy component lithium salt is recycled in the form of lithium fluoride; the process realizes comprehensive utilization of the waste electrolyte, and avoids waste of lithium elements and carbonate solvents.

The objective is to provide a diol-containing composition that enables the stable production of polycarbonate diol compositions for obtaining polyurethanes suitable for use in paints, coatings, and adhesives. [Solution] A diol-containing composition comprising a diol compound (4) represented by the following general formula (IV) and a tetrahydropyran compound (3-1) represented by the following general formula (III-1). [Formula 1] JPEG2026054816000039.jpg567 (In the above general formula (IV), n is an integer between 3 and 6.) [chemical 2] JPEG2026054816000040.jpg1572 (In the above general formula (III-1), R1 is a C2-C12 alkyl group or hydrogen atom, which may have substituents or heteroatoms.) A polycarbonate diol composition comprising the aforementioned diol-containing composition and a carbonate-based compound as raw materials.

The invention relates to a preparation method and application of polyether glycol, the structural formula of the polyether glycol is shown in the specification, the preparation method comprises the following steps: trimethylolpropane and carbonic ester are subjected to transesterification to obtain a ketal compound, then the ketal compound is used as an initiator to polymerize ethylene oxide to obtain nonionic polyether mono-alcohol, and the nonionic polyether mono-alcohol is used as a solvent. And carrying out Williamson reaction on the polyether monoalcohol to obtain methyl-terminated polyether, and carrying out ring-opening reaction on the methyl-terminated polyether under an acidic condition to obtain the nonionic polyether glycol. The preparation process is wide in raw material source, low in cost, mild in condition, efficient in reaction and wide in industrialization prospect.

The preparation method comprises the following steps: mixing aliphatic diol with dimethyl carbonate, adding isophorone diisocyanate and a carboxyl-containing chain extender, and adding a neutralizing agent and an organic solvent, so as to obtain a water-based polycarbonate emulsion; adding a phosphate-containing chain extension monomer into the high-molecular-weight polycarbonate polyol intermediate, heating for condensation polymerization to obtain phosphate-containing active resin, and heating the low-molecular-weight polycarbonate polyol intermediate and alkylsilane for condensation polymerization to obtain a silane modified polycarbon oligomer; the preparation method comprises the following steps: mixing a water-based polycarbonate emulsion, phosphate-containing active resin and a silane modified polycarbon oligomer, and adding a nano inorganic filler to obtain a water-based high-activity polycarbon coating; after the water-based high-activity poly-carbon coating is applied to the surface of a base material, a water-based high-activity poly-carbon coating is formed on the surface of the base material. The problems of adhesion attenuation and coating blistering and falling under high-temperature and high-humidity conditions are effectively inhibited.

The invention relates to a method for recycling aromatic polycarbonate comprising the steps of: (Ia) providing a recycle stream of recycled polycarbonate having in its backbone repeating units based on at least one type of bisphenol, (Ib) feeding the recycle stream to a depolymerization unit wherein said recycle stream is combined with an alkyl alcohol to form a reaction mixture, (Ic) reacting the reaction mixture in the depolymerization unit, thereby forming a stream comprising alkylcarbonate and bisphenol, (Id) separating said alkylcarbonate from said bisphenol in at least one distillation column, (I-1) feeding the separated alkylcarbonate recovered in step (Id) to a diarylcarbonate manufacturing unit and reacting said alkylcarbonate with hydroxyaryl compound thereby forming diarylcarbonate, (I-2) manufacturing polycarbonate using, at least in part, said diarylcarbonate obtained in step (I-1).

The invention discloses a bio-based electrophoretic paint cross-linking agent composition S1. The bio-based electrophoretic paint cross-linking agent composition S1 comprises the following components: a bio-based polyol component; an isocyanate component; the catalyst comprises an organic bismuth or zinc catalyst; the solvent comprises propylene glycol methyl ether acetate or bio-based propylene carbonate. The electrophoretic paint cross-linking agent composition S2 comprises the following components: a cyclic carbonate monomer; a polyene polyamine; a thiol-ene click chemical reagent; an end-capping reagent and an organic tin catalyst component. An electrophoretic paint composition is prepared from the bio-based electrophoretic paint cross-linking agent composition. The invention provides a polyisocyanate cross-linking agent taking castor oil and bio-based polycarbonate diol as raw materials and a carbamate cross-linking agent prepared from cyclic carbonate and polyene polyamine, and the polyisocyanate cross-linking agent and the carbamate cross-linking agent have the following advantages that the bio-based content is greater than or equal to 60%, and the consumption of petroleum resources is reduced; the curing temperature is not more than 140 DEG C; vOC emission is reduced by more than 30%; and the adhesion, salt fog resistance and other properties of the coating reach or exceed those of a traditional system.

The application discloses an O-desmethylvenlafaxine prodrug and a preparation method and application thereof, relates to the technical field of drug synthesis, and the structural formula of the O-desmethylvenlafaxine prodrug is shown in the following formula: The phenolic hydroxyl in the structure of the O-desmethylvenlafaxine is etherified or carbonated through a substitution reaction, O-desmethylvenlafaxine prodrug is synthesized, the bioavailability of the O-desmethylvenlafaxine can be remarkably improved, and a compound with the prodrug property is screened through a pharmacokinetics test.

This invention relates to a method for preparing a capped polycarbonate resin, comprising the steps of: a) reacting a dihydroxy compound and a carbonate in a melt, optionally in the presence of an transesterification catalyst, thereby forming a polycarbonate in a molten phase having free hydroxyl terminal groups; and b) reacting the polycarbonate in the molten phase with a capping agent to produce a capped polycarbonate resin, wherein the capping agent comprises an anhydride, and wherein the polycarbonate in the molten phase is subjected to at least partially vacuum after being combined with the capping agent. The invention also relates to capped polycarbonate resins obtained or obtainable by this method. Furthermore, the invention relates to molding articles comprising or composed of such capped polycarbonate resins, and methods for manufacturing such molding articles.

Provided is a polymerizable composition including (a) a polymerizable component comprising a diol bis(allyl carbonate) and / or a pre-polymer thereof; and (b) a polymerization initiator component including: (i) a di(C6-C10 alkyl) peroxydicarbonate, and (ii) an organic peroxide having one peroxy, one peroxycarbonate, or one peroxybenzoate group and a 1,1-dimethylalkyl group bonded to a peroxy oxygen, where (ii) comprises a molecular weight ranging from 200 to 250 g / mole, the polymerization initiator (b) is free of diisopropyl peroxydicarbonate, (i) comprises an amount ranging from 4.87% to 7.90% by weight relative to the total solids of the polymerizable composition and (ii) comprises an amount within the range defined by the following formula: (4.406X2−0.592X+0.021)≤Y≤(0.726X2−0.121X+0.009) where X corresponds to the weight fraction of (i) and Y corresponds to the weight fraction of (ii). Also provided is a method of making an optical article from the polymerizable composition.

Lithium-ion battery, characterized in that it consists of a cathode, an anode and a non-aqueous electrolyte; wherein the cathode comprises a cathode material layer containing an active cathode material, wherein the active cathode material comprises a compound represented by formula (A): Li x Ni a Co b M' 1-a-b O 2-y A y Formula (A) where in formula (A) -0.1 ≤ x ≤ 0.2, 0.8 ≤ a < 1, 0 ≤ b < 0.2, 0.8 ≤ a + b < 1, 0 ≤ y < 0.2 hold; where M' comprises one or both of the elements Mn or Al and zero, one or more of the elements Sr, Mg, Ti, Ca, Zr, Zn, Si, Fe, B, Ga, Cr, W, V, Nb and Ce; where A comprises one or more of S, N, F, B, Cl, Br and I; wherein the anode comprises an anode material layer containing an active anode material, wherein the active anode material comprises a silicon-based material; wherein the non-aqueous electrolyte comprises a lithium salt and an organic solvent, wherein the organic solvent comprises cyclic carbonate, and wherein the cyclic carbonate comprises fluorinated ethylene carbonate and propylene carbonate; where the lithium-ion battery meets the following conditions: 0.2 ≤ S / F ≤ 2 ,0 ,2 ≤ P / F ≤ 3 ,5 and 3 ≤ S ≤ 15 ,2 ≤ F ≤ 15 ,2 ≤ P ≤ 25 , 15 ≤ C ≤ 40; where S denotes the mass fraction of silicon in the anode material layer, expressed in wt.%; where F denotes the mass fraction of fluorinated ethylene carbonate in the non-aqueous electrolyte, expressed in wt.%; where P denotes the mass fraction of propylene carbonate in the non-aqueous electrolyte, expressed in wt.%; where C denotes the mass fraction of cyclic carbonate in the non-aqueous electrolyte, expressed in wt.%.

The invention belongs to the field of fuel additive preparation, and relates to a preparation method of an alcohol-based oxygen-containing fuel additive. In order to solve the problems that an existing carbonic ester additive is relatively low in boiling point and is not matched with a diesel distillation range, the invention develops a special catalyst and a preparation process for preparing an alcohol-based oxygen-containing fuel additive, the catalyst takes a hierarchical pore molecular sieve as a carrier, and a potassium alcoholate active component and an amphiphilic molecule linking agent are introduced. Then catalyzing the ester exchange reaction of dimethyl carbonate and butanol by using the catalyst to generate a mixture of methyl butyl carbonate, dibutyl carbonate and the like, and fractionating to obtain the alcohol-based oxygen-containing fuel additive which has a proper boiling point and can be used for remarkably improving the oxygen content of the fuel.

Electrolyte for a battery cell, battery cell for a vehicle, and method for forming an electrolyte. The electrolyte comprises a base electrolyte. The base electrolyte comprises a primary lithium salt, a carbonate solvent, and an organic sulfate additive. The electrolyte also comprises lithium bis(fluorosulfonyl)imide (LiFSI), present in the range of 0.1 wt% to 1 wt% of the total weight of the electrolyte, a phosphite ester oxygen scavenger, present in the range of 0.01 wt% to 1.5 wt% of the total weight of the electrolyte, and fluoroethylene carbonate, present in the range of 0.5 wt% to 2.0 wt% of the total weight of the electrolyte. The base electrolyte is the remaining wt% of the total weight of the electrolyte, and the total wt% of the electrolyte is 100 wt%.

This invention discloses an axially chiral 1,4'-biquinolinone and its derivatives, and a synthetic method thereof. The method uses MBH carbonate and quinoline-2(1 H Using β-ketones as raw materials, (DHQD)₂PYR as catalyst, and DME as solvent, a centrally chiral β-substituted allyl intermediate was synthesized; then, using iron powder as a reducing agent and acetic acid as solvent, enantiomeric enriched centrally chiral γ-lactam compounds were obtained; finally, using DBN as a base and DME as solvent, enantiomeric enriched compounds were obtained. (S) -Axial chiral 1,4'-biquinolinone or its derivatives. The method of this invention has mild reaction conditions, readily available raw materials, high enantioselectivity of the product, and excellent yield. The synthesized 1,4'-biquinolinone or its derivatives can be further used to synthesize novel substituted quinolinone phosphonate compounds, and to synthesize drugs with antibacterial, antimalarial, anticancer, antitumor, or herbicidal activities, showing broad application prospects.

The application discloses a preparation method of a catalyst based on a pyridine ionic liquid and application thereof, and belongs to the technical field of catalyst preparation. The catalyst based on the pyridine ionic liquid is prepared by utilizing the hydrolysis reaction of a silane coupling agent to obtain silica nanotubes containing a pyridine unit, and then through a quaternary ammonium reaction. The catalyst has a high specific surface area and a rich pore structure, is favorable for exposure of active sites and contact of the active sites with reactants, and improves a catalytic rate. Meanwhile, the silica nanotubes contain hydroxyl groups, can synergistically catalyze a carbon dioxide cycloaddition reaction with pyridine ionic liquid sites, and can catalyze a reaction of carbon dioxide and an epoxide compound to prepare a cyclic carbonate under a solvent-free and metal-free condition. The catalyst is easy to recycle, product purification is simple, and the catalyst has a good application prospect.