563results about How to "Reaction raw materials are readily available" patented technology

The invention discloses an adsorbing material prepared from waste straws and capable of adsorbing trivalent arsenic from water as well as a preparation method and an application thereof, and belongs to the field of synthesis and application of environment functional materials. The adsorbing material is prepared by using the waste straws as matrixes through one-step quaternary ammoniated reaction. The preparation method is simple and the sources of the raw materials are wide; the prepared adsorbing material is capable of effectively adsorbing and removing the trivalent arsenic out of water; after adsorption, the trivalent arsenic in the adsorbing material can be desorbed by using a sodium chloride or sodium hydroxide solution; and the adsorbing material regenerated after desorption has stable arsenic adsorption property. The adsorbing material prepared by the method is an effective way of the resource utilization of the waste straws in farmlands.

The invention discloses a synthesis method of dicamba, which comprises the following steps of: using 2, 5-dichlorophenol as raw materials, conducting sulfonation and bromination reaction to obtain 4-hydroxy-2, 5-dichloro-3-bromobenzenesulfonic acid, treating the 4-hydroxy-2, 5-dichloro-3-bromobenzenesulfonic acid by using alkyl metal complexes of magnesium or lithium, conducting electrophilic addition reaction with CO2 to obtain 5-sulfo-3, 6-diclorsalicylic acid, removing the sulfo of the 5-sulfo-3, 6-diclorsalicylic acid and conducting O-methylation reaction with methyl chloride to obtain the dicamba. The synthesis method of dicamba has the advantages that since the 2, 5-dichlorophenol is used as the raw materials, the raw materials for reaction are easy to obtain, the reaction process is environmental-friendly, the quality of the obtained product is high, the yield is high and the application value is greater.

The invention discloses a method for synthesizing 1,3-dibasic alcohol or cyclic acetal of 1,3-dibasic alcohol(1,3-dioxane derivative)by using a functional acid ionic liquid serving as a catalyst to catalyze the condensation reaction of formaldehyde and alkene. In the method, the aqueous solution of formaldehyde and the alkene are used as reactants to the 1,3-dibasic alcohol or cyclic acetal of 1,3-dibasic alcohol(1,3-dioxane derivative) under a mild reaction condition in the presence of the functional acid ionic liquid serving as the catalyst. The method has the advantages of readily availablereaction materials, low-corrosivity high-catalytic activity reusable catalyst, high product selectivity, simple reaction process, easy operation and strong controllability.

The invention discloses a new chemical synthesizing method of yipisidin, which comprises the following steps: ammonifying 6-chloromethyl-11-dihyrogen-dibenz [b,e] aza to generate 6-aminomethyl-11-dihydrogen-dibenz [b,e] aza; reducing the 6-aminomethyl-11-dihydrogen-dibenz [b,e] aza into 6-aminomethyl-6,11-dihydrogen-5H-dibenz [b,e] aza; generating the product through cyanogen bromide to loop. The invention simplifies the making method with little by-product, which improves the receiving rate by 69% with high purity (HPLC. 99. 0%) for industrial manufacturing.

The invention relates to a preparation method of vinyl sulfate. The preparation method comprises the following steps: adding ethylene glycol into a reaction kettle A filled with a halohydrocarbon solvent, uniformly stirring, dropwise adding thionyl chloride to carry out a substitution reaction, removing hydrogen chloride by reduced-pressure distillation, then, washing a reaction solution to be neutral by using a saturated sodium bicarbonate solution, standing still, and skimming to obtain a glycol sulfite halohydrocarbon solution; adding the glycol sulfite halohydrocarbon solution into a reaction kettle B, adding monopotassium phosphate or sodium tungstate as a catalyst, regulating the pH by using a sodium bicarbonate aqueous solution, and adding a sodium hypochlorite aqueous solution to carry out an oxidation reaction; at the end of the reaction, skimming to obtain a vinyl sulfate halogenated alkane solution, carrying out concentration, then, adding n-hexane to carry out recrystallization, and carrying out filtration to obtain high-purity vinyl sulfate. By using the preparation method, raw materials are available, the price of the catalyst is low, the product is easy to purify, and the obtained product is low in acidity, low in water content, high in purity and suitable for large-scale production.

The present invention discloses a silicon-carbon composite nano-tube preparation method, which comprises: dissolving zinc oxide nano-rods in a solvent, adjusting to achieve an alkaline state, mixing with tetraethyl orthosilicate, reacting, carrying out centrifugation drying to obtain a silicon dioxide coated core-shell structure material, recording as ZnO@SiO2, adding the ZnO@SiO2 to a reactor, heating in the presence of an inert gas, introducing acetylene gas, reacting, depositing a carbon coating layer on the silicon dioxide coated core-shell structure material surface, recording as ZnO@SiO2@C, carrying out a magnesium thermal reduction reaction on the ZnO@SiO2@C, removing the zinc oxide nano-rod template, and carrying out a post-treatment to obtain the silicon-carbon composite nano-tubes. According to the present invention, the zinc oxide nano-rods are adopted as the template to prepare the silicon-carbon composite nano-tubes, the preparation process is simple, the template removing is convenient and complete, the large-scale industrial production is easily achieved, and the new approach for synthesizing other types of the nano-tubes is provided.

The invention relates to a method for preparing a molybdenum disulfide / graphene alternate intercalation structure material. The method includes the following steps that a moderate molybdenum source and a moderate sulfur source are dissolved in water respectively, and are fully stirred to obtain even solutions; a surfactant is added into the sulfur source, then the obtained molybdenum-source solution is slowly dropped into a solution formed by the sulfur source and the surfactant, a uniform solution or colloid is formed, the uniform solution or colloid is heated to 100 DEG C to 300 DEG C at thepressure of 10 MPa to 300 MPa, and is reacted for 3 hours to 48 hours at the constant temperature, and after the reaction is end, a reaction system is naturally cooled to be the indoor temperature, and pressure is released; the obtained powder is washed, dried and calcined, and the molybdenum disulfide / graphene alternate intercalation structure material is obtained. The method is simple in preparing process and environmentally friendly, an intercalation structure of molybdenum disulfide and graphene can be obtained, the interlayer spacing of the molybdenum disulfide is amplified accordingly,and the method has the important application value in the research aspects of a high-efficiency photocatalyst and a new energy material.

The invention discloses a double-metal co-doped carbon nano-composite material and a preparation method thereof. The composite material is prepared from a carbon substrate and ferrocene-phenylalanine and transition metal except iron, which are co-assembled on the carbon substrate through a non-covalent bond, wherein the ferrocene-phenylalanine, the transition metal except the iron and the carbon substrate commonly form a raspberry-like nanosphere structure. The invention further discloses a double-metal-nitrogen-carbon nano-catalyst obtained by mixing the composite material with dicyanodiamide and carbonizing and further provides application of the double-metal-nitrogen-carbon nano-catalyst to catalytic oxygen reduction reaction. The preparation methods of the composite material and the catalyst have simple steps and low cost and are suitable for large-scale application. The double-metal-nitrogen-carbon nano-catalyst provided by the invention has excellent electrochemical performance and has good methanol toxin resistance and stability, so that the double-metal-nitrogen-carbon nano-catalyst has a good application prospect in the field of the catalytic oxygen reduction reaction.

The invention discloses hyperbranched polytriazole formate as well as a preparation method and application thereof. The preparation method of hyperbranched polytriazole formate comprises the following steps: firstly, synthesizing binary azide containing a tetraphenyl ethylene unit; then synthesizing a ternary ester compound containing alkynyl based on ternary alcohol and propiolic acid as raw materials; and finally, carrying out non-metal-catalytic 'click' polymerization reaction under the heating condition in a polar solvent by utilizing the azide and the alkynyl-containing ester compound soas to obtain a target polymer in high yield. The hyperbranched polytriazole formate prepared by using the method is high in 1,4-stereoregularity, good in workability and high in thermal stability, degradability, illumination patterning and aggregation-induced emission property. The invention also discloses application of hyperbranched polytriazole formate in detection of a polynitroarene explosive.

The invention relates to the field of chemistry, in particular to a synthetic method and application of N, N'-bis-[3-hydroxy-4-(2-benzothiazole)phenyl] carbamide. The molecular structural formula of the N,N'-2-[3-hydroxy-4-(2-benzothiazole)phenyl] carbamide is shown at the right; and the synthetic method of the N, N'-bis-[3-hydroxy-4-(2-benzothiazole)phenyl] carbamide comprises the step that 2-(4-amido-2-hydroxybenzene radical) benzothiazole, 4-AHBA for short, and carbonyl imidazole, CDI for short, are used as raw materials and react in toluene, benzene or xylene solvents to obtain the N, N'-bis-[3-hydroxy-4-(2-benzothiazole)phenyl] carbamide, for short 4-DHBTU. The reaction equation is shown at the right upper part. The invention has available reaction raw materials, mild reaction conditions and high yield; any other catalysts and (or) reaction auxiliary agents do not need to be added in the reaction process, the operation is simple and safe, the phenolic hydroxyl radical of the 4-AHBA does not need to be protected, and the recovery of a byproduct of the imidazole is convenient; and the 4-DHBTU is used as a fluorescent probe and used for the detection of Zn, the concentration lower limit of the Zn is measured and can reach 1*10mol / L, and Fe, Fe, Cd, Co, Mn, Cu, Ni, Ag, Sn, La and Pb all do not interfere the measurement of the concentration of the Zn.

The invention relates to a preparation method of a lithium ion battery high-cycle capacity voltage fading-resistant lithium-rich layered cathode material, belonging to the technical field of new energy sources. As that method of the invention utilize only the high-abundance elements of the earth, From the viewpoint of its intrinsic structure, transition metal ion Ni occupation in Li-rich layered cathode material was controlled by calcination, so that one part occupied 2c site and 4h site in the C2 / m phase of Li-rich layered cathode material, and one part occupied in the R. 3m phase, so as to improve the voltage decline and capacity decline of the Li-rich layered cathode material in the charge and discharge process, and improve the lithium ion transport capacity of the Li-rich layered cathode material itself. The method of the invention is a coprecipitation solid-state sintering method, which has the advantages of simple synthesis process, high production efficiency and the like, and issuitable for large-scale production.

The invention provides a synthetic method of a hindered phenol / hindered amine intramolecular compound anti-oxidant, comprising the following steps of: dissolving a compound I in a solvent A, adding thionyl chloride, performing substitution reaction, carrying out underpressure distillation to remove the solvent A and unreacted thionyl chloride so as to obtain a compound II, respectively dissolvingthe compound II and a compound III by the use of a solvent B, mixing, performing amidation reaction, adding an acid binding agent, continuously reacting, filtering after the reaction, washing, and carrying out vacuum drying to obtain the hindered phenol / hindered amine intramolecular compound anti-oxidant. According to the invention, the reaction raw materials are easily available, the method is simple, and the yield is high. As the product molecule contains hindered phenol antioxidation group and hindered amine light stabilizer function group, oxidation resistance of a polymer is raised.

The invention belongs to the technical field of organic chemistry, and particularly relates to a method for preparing a 3-sulfonyl coumarin compound. According to the method, arenediazonium salt, phenyl ester phenylpropiolate and DABCO.(SO2)2 react in an organic solvent to prepare the 3-sulfonyl coumarin compound. The structure of the compound is represented through the 1 H NMR, 13 C NMR, HRMS and single crystal x-ray diffraction analysis methods and determined. According to the method, under very mild and simple conditions, DABCO.(SO2)2 serves as a sulfur dioxide source, sulfur acylation reaction is achieved directly, and the 3-sulfonyl coumarin compound is built. Raw materials in the reaction are easy to obtain, cost is low, use of a sulfonyl chloride intermediate in a traditional synthesis method is avoided, and the method can be suitable for large-scale preparation and has very good application prospects.

The invention discloses a halogen-free phosphazene expanding-type flame retardant and a preparation method thereof. The method comprises the following steps: dissolving an acid binding agent and neopentyl glycol in a solvent, and carrying out heating to 20-60 DEG C under the protection of inert gas; slowly dropwise adding a phosphonitrilic chloride trimer solution, finishing the adding in 0.5-1 hours, carrying out heating to 40-120 DEG C, carrying out a reflux reaction for 4-24 hours, carrying out cooling, then carrying out filtering, reduced pressure distillation and recrystallizing, and carrying out vacuum drying at 65-90 DEG C to obtain a white solid which is the target product. The flame retardant provided by the invention has an initial decomposition temperature of 300 DEG C and has good compatibility when blended with a polymer, and the flame retardant is not dissolved in water and has excellent transference resistance. The flame retardant is prepared by adopting a one-step method, the reaction raw materials are simple and easy to obtain, the process is simple, by-products are few, the synthesis efficiency is high, the solvent can be recycled and reused after the reduced pressure distillation, and the preparation method is easy to industrialize. The flame retardant has the characteristics that no halogen exists in the molecular structure, no toxic gas is generated in a combustion process, and the flame retardant provided by the invention has a low smoke amount, greenness and no environmental pollution compared with a conventional flame retardant.

The present invention discloses a PA6 type polyamide thermoplastic elastomer material preparation method, wherein polyether amines with different molecular weights and different functionalities and caprolactam are subjected to copolymerization under the effect of a ring-opening agent to obtain a polyether amine and PA6 block copolymer, and the polymer is subjected to boiling water extraction and drying to obtain the final product. The PA6 type polyamide thermoplastic elastomer of the present invention has characteristics of good compression permanent, excellent mechanical property and wide application. The present invention further provides a preparation method of the PA6 type polyamide thermoplastic elastomer, wherein the method has characteristics of simple process, low energy consumption, high efficiency, easy operation and easy repeating.

The invention relates to a method for synthesizing isothiocyanate, belonging to the field of organic chemical industry. The method comprises the following steps: (1) synthesizing the isothiocyanate from a carbon sulfide reagent and primary amine used as raw materials, adding an alkali reagent used as the catalyst and the acid binding agent, and adding a solvent at the same time, wherein the organic reaction temperature is controlled at 300 DEG C below zero to 1,200 DEG C above zero, the reaction lasts for 1-30 hours, the molar ratio of the substituted phenoxy sulfuryl chloride to the alkyl primary amine is 1-3:1, and the molar ratio of the alkali reagent to the alkyl primary amine is 1-10:1; and (2) adding water and dichloromethane solution at the volume ratio of 2:3, extracting and separating organic phases, extracting the water phases by using dichloromethane, merging the organic phases, washing by using saturated salt water, drying by using nhydrous sodium sulfate, and separating by adopting chromatography to obtain the isothiocyanate. The method for synthesizing the isothiocyanate has the advantages of readily available reaction materials, low toxicity, mild reaction condition, short reaction time and convenience of separation and purification, thereby having high application value.

The invention discloses a polyphenyltriazole formate, and a preparation method and application thereof. A phenylpropargylic acid dibasic ester monomer and a dibasic organic azido monomer used as raw materials are subjected to polymerization reaction in a polar aprotic solvent to obtain the polyphenyltriazole formate. The preparation method has the advantages of accessible reaction raw materials and no byproduct generation in the polymerization reaction process, and conforms to the atom economy. The polymerization reaction has wide substrate applicability and favorable functional group compatibility, and is convenient for introducing multiple functional groups. The polymerization reaction does not use any metal catalyst, and thus, can eliminate the influence of catalyst residues on the biological and photoelectric properties of the polymer material. The polyphenyltriazole formate has the advantages of favorable processability, higher heat stability, higher degradability and higher aggregation-induced luminescence, and has potential application values in the aspects of optical plastics, biomedical materials, fluorescence detection and the like.

The invention discloses a chiral vicinal diamine compound and a method for preparing the same.The method includes catalyzing organic amine and substituted racemic or meso N-sulfonyl ethylene imine under by the aid of a catalyst system with univalent silver salt and chiral diphosphine ligands at the temperatures of 15-40 DEG C to carry out asymmetric ring-opening reaction so as to synthesize the chiral vicinal diamine compound.The chiral vicinal diamine compound and the method have the advantages that the chiral vicinal diamine compound can be prepared in a catalytic asymmetric ring-opening mode, the method is applicable to the racemic or meso N-Ts ethylene imine, reaction raw materials are simple and are easily available, reaction conditions are mild, products are abundant in structure types, and the chiral vicinal diamine and the method are high in yield and stereoscopic selectivity.

The invention relates to a preparation method of carbazochrome sodium sulfonate, belonging to the technical field of preparation of vascular hemostatics. The method comprises the following steps: raw materials dissolution and reaction: putting purified water, carbazochrome, sodium bisulfite and ascorbic acid into a reaction tank, heating while stirring until the solid substances are completely dissolved, and continuing keeping the temperature to react, thereby obtaining a reaction solution; decolorization and separation: adding a decolorant into the reaction solution, keeping the temperature while stirring for decolorization, after finishing decolorization, carrying out centrifugal filtration, washing residues with purified water, carrying out centrifugal drying, and merging the centrifugal filtrates to obtain a solution to be crystallized; crystallization: regulating the pH value of the solution to be crystallized with an alkaline matter, freezing to cooling, and standing to precipitate crystals; and refinement: carrying out centrifugal filtration on the crystals, washing, carrying out centrifugal drying, and drying in a vacuum drying oven to obtain the carbazochrome sodium sulfonate. The invention has the advantages of accessible reaction raw material, short reaction steps, mild reaction conditions, high reaction yield (up to more than 90%), better reaction product quality and high purity (up to more than 99%), and is convenient and simple to operate.

The invention relates to a method preparing an epinastine hydrochloride intermediate and epinastine hydrochloride. The method comprises the following steps: reacting 6-chloromethyl-11-dihydro-dibenzo[b,e]azepine and an amino reagent under protection to generate an amino-protective compound; carrying out reduction reaction and deprotection reaction to generate 6-aminomethyl-6,11-dihydro-dibenzo[b,e]azepine; and finally, carrying out cyanogen bromide cyclization on the 6-aminomethyl-6,11-dihydro-dibenzo[b,e]azepine, neutralizing with alkali, and reacting with hydrochloric acid to generate the epinastine hydrochloride. The preparation method has the advantages of accessible reaction raw materials, fewer byproducts and high product purity, and is suitable for industrial production.

The invention discloses a method for preparing flake alpha-Al2O3 granular powder. The method comprises the following steps: preparing water solution by inorganic salt solution of aluminum, then adding proper amount of alkali into the water solution to make the pH value of a system more than 6, filtering, washing and drying the aluminum hydroxide, grinding the aluminum hydroxide into fine powder, adding potassium sulphate into the ground fine powder, or adding the fine powder into potassium sulphate water solution according to a molar ratio of the potassium sulphate to the aluminum hydroxide of 5 to 15, calcining the mixed powder for 2 to 5 hours at the temperature of between 850 and 1,050 DEG C, washing a calcined product by water to remove the potassium sulphate, and drying the product.

The invention discloses a synthesis method of polysubstituted sulfur-containing or selenium-containing benzo[c,d]indole compounds. Firstly, 8-alkynylnaphthylamine compounds, thioether (diselenide), acatalyst and an additive are placed in a reactor, a solvent is added to the reactor until 8-alkynylnaphthylamine compounds and thioether (diselenide) are completely dissolved, then, the mixture is heated to react, after the reaction, aftertreatment is performed, and the polysubstituted sulfur-containing or selenium-containing benzo[c,d]indole compounds are obtained. The polysubstituted sulfur-containing or selenium-containing benzo[c,d]indole compounds are synthesized with a one-pot one-step method, the reaction operation is simple, intermediate separation and purification processes are reduced, the reaction condition is mild, the reaction selectivity is good, the yield is high, the substrate universality is wide, the reaction materials are simple and easy to obtain, the production cost islow, and the method is applicable to large-scale industrial production as well as small-scale laboratory preparation.

The invention discloses a preparation method of polyvinylene sulfide. The preparation method comprises the following step of performing click polymerization reaction on a binary alkynyl compound and a binary mercapto-compound in an organic solvent to obtain the polyvinylene sulfide. The obtained polyvinylene sulfide comprises an internal unit shown in a formula (I), the step of polymerization is shown in a formula (IV), wherein n is more than 1 and is selected from organic groups. The preparation method does not need heating or any catalyst, is simple and efficient in process, and has excellent space selectivity. The invention also discloses the polyvinylene sulfide obtained through the preparation method, and the polyvinylene sulfide has good workability and film-forming property, high heat stability and refractive index and aggregation induced luminescent property.

The preparation process of deoxy fructosazine features that the self condensation reaction of aminoglucose or its salt as reaction material in the presence of boric acid or borate as catalyst, the nanofiltering film separating technology to separate the side product and intercept the target product deoxy fructosazine, and the concentration and re-crystallization of the intercepted product liquid to obtain the target product deoxy fructosazine. Compared with available technology, the present invention has the advantages of simple technological process, convenient operation, short reaction period, low power consumption and high deoxy fructosazine yield up to 55-60 %, and the features of homogeneous reaction, low reaction temperature, no toxicity, low cost and high conversion rate, and may be used in industrial production.

The invention belongs to the fields of high polymer chemistry and material science, and discloses a poly(allyl ether) compound, and a preparation method and application thereof. The method comprises the following steps: (1) performing polymerization reaction on a binary propinyl compound and a binary hydroxyl compound in organic solvent in an inert gas protective atmosphere to obtain a crude product; and (2) performing post-treatment on the crude product to obtain the poly(allyl ether) compound. The poly(allyl ether) compound has a structure shown in Formula (I), wherein n is an integer of 2-200, and R2 is a same or different organic group. The method disclosed by the invention has the advantages of mild conditions, simple and accessible polymerizable monomers, high polymer yield, high molecular weight, high atom economy and excellent regioselectivity; and the poly(allyl ether) compound disclosed by the invention has excellent processability and high thermal stability. The Formula (I) is shown in the specification.

The invention relates to the preparation of magnesia, concretely a nestlike monodisperse magnesia preparing method, in a 120-140 deg.C heating system, and a water solution system, using soluble Mg salts and soluble carbonates as raw materials, producing alkali magnesium carbonates by codeposition reaction, then making high temperature baking and making it. And the method is simple to operate, the raw materials are easy to obtain, and the product has a uniform particle size and a shape easy to control.

The invention discloses polyvinyl thioether ester as well as a preparation method and application thereof. The polyvinyl thioether ester is obtained through solution polymerization reaction by takinga binary acetylene acid ester internal alkyne monomer and a binary sulfydryl monomer as raw materials. The reaction raw materials are easy to obtain, no by-product is generated in the polymerization reaction process, and the atom economy is met; the polymerization reaction has wide substrate applicability and good functional group compatibility, and various functional groups can be conveniently introduced; no catalyst is used in the polymerization reaction, so that the influence of catalyst residues on photoelectric and biological properties of the polymer material can be eliminated. The polyvinyl thioether ester prepared by the invention has good processability, high thermal stability and aggregation-induced emission performance, and has application value in the aspects of optical plastics, biomedical materials, fluorescence sensing and the like.

The invention discloses a preparation method of a 4,5-disubstituted-2-substituted aminothiazole compound. The preparation method comprises steps as follows: 1), nitro epoxy compounds and thiourea compounds react at the room temperature for 4-8 h in the presence of a solvent and a basic catalyst; a mole ratio of the nitro epoxy compounds to the thiourea compounds to the basic catalyst is 1: (1.8-2.2): (1.8-2.2); 2), a reaction liquid obtained in the step 1) is concentrated, subjected to solvent removal and added with water, a mixture is extracted by dichloromethane, an organic layer is obtained and then is washed, dried and concentrated by a rotary evaporator; 3), the concentrate obtained in the step 2) is subjected to silica-gel column chromatography, and the 4,5-disubstituted-2-substituted aminothiazole compound is obtained.

The invention discloses a graphene / copper composite conductive material and a preparation method thereof. The graphene / copper composite conductive material is formed by dispersing graphene in a coppermatrix uniformly. The preparation method comprises the steps that firstly at least one surface of an organic polymer thin film is exposed to laser irradiation, and the surface of the organic polymeris carbonized to form the graphene and presents a three-dimensional porous structure; then the graphene and substrate are put into a copper sulfate plating solution and subjected to electrochemical copper plating to form the graphene / copper composite material; the drying treatment in vacuum atmosphere is further carried out, and a composite material is stripped from the substrate; and finally thegraphene / copper composite conductive material is obtained through compression molding and high temperature sintering. According to the graphene / copper composite conductive material, because of the uniform distribution of the graphene in the copper matrix, good mechanical properties and electrical properties are achieved, the preparation method is simple in operation, raw materials are easy to obtain, and the graphene / copper composite conductive material meets different application demands, especially in the field of copper cables; and the graphene / copper composite conductive material is convenient to popularize.

The invention provides a method for extracting lithium from salt lake brine with a high magnesium to lithium ratio. An extracting system comprises an extracting agent, a co-extracting agent and a diluent; the extracting agent is a mixture of sulphonamide compounds and tributyl phosphate; the co-extracting agent is ferric trichloride; the diluent is solvent gasoline or sulfonated kerosene. According to the method, the concentration of the tributyl phosphate is reduced, so that the dissolving amount of brine in the tributyl phosphate is reduced; a water-in-oil phenomenon is improved; the product impurity is improved; during a back-extraction process of the materials, the hydrolysis capacity of the materials is reduced by acidity, so that the loss of an oil phase in repeated extracting processes is reduced, and meanwhile, the lithium extraction yield in the prior art is achieved, operation is easy in the extracting process, and industrial production is facilitated.