647 results about "Protic solvent" patented technology

A method for efficiently and safely cleaning an apparatus for tin compound and a highly purified tin compound apparatus are provided. A cleaning method for an apparatus that has been in contact with a tin compound having formula (1) below includes at least steps (A) to (C), in which step (B) is performed after step (A), and step (C) is performed after step (B):(A) a step of cleaning the apparatus with a non-protic solvent,(B) a step of cleaning the apparatus with alcohol, and(C) a step of cleaning the apparatus with ultrapure water having a resistivity value of 17 MΩ·cm at 25° C.RpSnXm  (1)In formula (1), R is a hydrocarbon group, p is an integer from 1 to 3, X is a hydrolyzable substituent, and m=4−p.

A method for efficiently and safely cleaning an apparatus for a tin compound and a highly purified apparatus for a tin compound are provided. A method of cleaning an apparatus that has been in contact with a tin compound having formula (1) includes at least steps (A) to (C) in this order:(A) a step of cleaning the apparatus with a non-protonic solvent,(B) a step of cleaning the apparatus with an acidic aqueous solution and / or alkaline aqueous solution, and(C) a step of cleaning the apparatus with ultrapure water having a resistivity of 17 MΩ·cm at 25° C.RpSnXm  (1)R is a hydrocarbon group, p is an integer of 0 to 3, X is a hydrolyzable substituent, and m=4-p.

The invention relates to a bis-polyisobutylene alcohol amine compound and compositions thereof. The invention also is directed to a new process for making the bis-polyisobutylene alcohol amine by reacting a polyisobutylene epoxide with a polyamine, optionally in the presence of a catalyst, a protic solvent initiator and / or a diluent. In addition, the invention further relates to the many uses of the bis-polyisobutylene alcohol amine including but not limited to its use in lubricants, surfactants, emulsifiers, resins, and the like.

The invention relates to the technical field of organic synthesis, in particular to a preparation method of ethylene sulfate and derivatives thereof, which comprises the following steps: S1, taking an aprotic solvent as a reaction solvent, adding urea peroxide, and stirring until the urea peroxide is dissolved; s2, dropwise adding ethylene sulfite or an ethylene sulfite derivative, stirring for reaction, and purifying to obtain ethylene sulfate or an ethylene sulfate derivative; the method has the advantages of reducing the catalyst cost and reducing the wastewater amount.

The invention belongs to the technical field of liquid chromatography-mass spectrometry detection pretreatment, and particularly relates to a pretreatment method for liquid chromatography-tandem mass spectrometry analysis of pesticide and veterinary drug residues in serum, which comprises the following steps: (S1) carrying out heating reaction on Sc (III) salt, Cu (II) salt and 1H-pyrazole-4-formic acid (H2PyC) in a polar aprotic solvent, and cooling to obtain a green crystal, namely MOF-919; the chemical formula of the MOF-919 is [Sc < 3 > (mu3-O) (OH) < 3 >] [Cu3 (mu3-O) (mu-PyC) < 3 > (H2O) < 6 >] < 2 >; (S2) mixing the serum sample with an acetonitrile solution containing formic acid, carrying out ultrasonic treatment, vortex oscillation and centrifugation, taking supernate, and diluting the supernate with an aqueous solution containing formic acid to obtain a to-be-purified solution; and (S3) adding MOF-919 into the to-be-purified liquid, mixing, performing ultrasonic treatment, performing vortex oscillation, centrifuging, and taking supernate, thereby completing the pretreatment of the to-be-purified liquid. According to the method, the MOF-919 is used for adsorbing chemical pollutant residues in serum, especially phospholipids, so that the purpose of removing the chemical pollutant residues in blood is achieved. The method is simple and convenient to operate, small in organic solvent consumption and good in purification effect, and can be widely applied to residue analysis of chemical pollutants in serum.

Disclosed is a process for making a polyarylether sulfone "PAES" (P2) using recycled polymeric material, the process comprising: heating a reaction medium (RM) comprising recycled polymeric material comprising a polyarylether sulfone "PAES" (P1), at least one monomer (M), a basic salt-forming agent (A), and a polar aprotic solvent (S) to reach a reaction temperature of at least 150 DEG C to form the PAES (P2); and separating the formed PAES (P2) from the reaction medium. The PAES (P1) recycle ratio may be from 100 wt.% to 1 wt.%. The recycled polymeric material added to the reaction medium may further include other one or more polymers, solid fillers, and / or additives. The monomer (M) may be at least one aromatic diol monomer (AA) and / or at least one aromatic dihalogenated monomer (BB). The diol (AA) may include bisphenol A, bisphenol S, diphenol, 1, 4: 3, 6-dianhydrohexitol sugar diol, and / or tetramethyl bisphenol F, and the dihalo (BB) may include an unsulfonated and / or disulfonated dihalo diphenyl sulfone.

An improved solvent system for the formulation and application of N-alkyl thiophosphoric triamide urease inhibitors. These formulations provide safety and performance benefits relative to existing alternatives and enable storage, transport and subsequent coating or blending with urea based or organic based fertilizers. These formulations are comprised primarily of environmentally friendly aprotic and protic solvents (particularly dimethyl sulfoxide and alcohols / polyols) to stabilize the urease inhibitor.

Disclosed herein is an aqueous nucleic acid purification buffer comprising a polar aprotic solvent. Also provided herein are using such purification buffers to precipitate nucleic acids from a solution onto a solid support, thereby providing a solid support that binds to nucleic acids. Also provided herein is a method for treating a nucleic acid comprising exposing a sample comprising the nucleic acid to an aqueous medium comprising a polar aprotic solvent in the presence of a solid support; and precipitating the nucleic acid onto the solid support, thereby providing a solid support that binds to the nucleic acid. Further provided herein are kits and compositions comprising such aqueous nucleic acid purification buffers, as well as related nucleic acid analysis devices, and uses of the kits.

The invention relates to a sample treatment method for selectively removing glycosyl from glycosphingolipid through photocatalysis and a mass spectrometric detection method. The sample treatment method specifically comprises the following steps: (1) dissolving a sample in an alkaline protic solvent; (2) dispersing titanium dioxide particles; and (3) carrying out photocatalytic reaction under ultraviolet irradiation, and centrifuging to obtain a sample solution subjected to photocatalytic treatment. The mass spectrometric detection method specifically comprises the following steps: injecting a sample solution subjected to photocatalysis treatment into a mass spectrum, carrying out primary mass spectrometric detection, and carrying out comparison data analysis on the sample solution subjected to photocatalysis treatment and a sample extracting solution not subjected to photocatalysis treatment, a primary mass spectrum peak which is possibly a glycolipid decomposition product is screened through comparison and analysis results, and secondary mass spectrum detection is further carried out, so that the accurate molecular structure of glycolipid is analyzed. According to the method, the glycosyl head of glycolipid can be selectively, rapidly and efficiently removed in the presence of complex lipidomes, subsequent mass spectrum detection analysis is carried out, glycolipid spectrum peaks in complex mass spectrum peaks can be effectively, rapidly and accurately found out by comparing the mass spectrum peaks before and after removal, and the detection result is accurate. Important chemical information is provided for rapid locking of correct candidate substances in the first-level mass spectrum qualitative process, and meanwhile, the glycolipid decomposition product can obtain carbon chain structure information which is richer than that of original glycolipid to assist qualitative analysis.

The invention belongs to the technical field of polymer electrolyte membrane materials, and particularly relates to a high-ionic-conductivity polymer electrolyte membrane and a preparation method thereof.The preparation method comprises the steps that 1, PEO and lithium salt are added into a polar aprotic solvent, and the mixture is rapidly and violently stirred to be completely dissolved; (2) adding a cross-linking agent and a photoinitiator into the mixed solution, and violently stirring to obtain a mixed solution; and (3) coating the mixed solution in a polytetrafluoroethylene template, heating to remove the solvent, and performing ultraviolet radiation. According to the invention, a three-dimensional cross-linked network is formed by photocuring of an acrylate group of the cross-linking agent, PEO chain segment crystallization is inhibited, and lithium salt anions (such as TFSI-) are physically embedded. A benzene ring structure in a cross-linked network endows the electrolyte membrane with flexibility, mechanical property deterioration caused by a plasticizer or a diluent is avoided, the compact structure of the electrolyte membrane can inhibit lithium dendrite growth, the ionic conductivity reaches 1.7 * 10 <-4 > S / cm, and the electrochemical window reaches 4.9 V. The method is simple in process and suitable for large-scale preparation of the high-energy-density solid-state lithium battery.

The invention belongs to the field of preparation of ether substances, and particularly relates to a preparation method of perfluoro-2-alkoxy propionyl fluoride and perfluoroalkyl vinyl ether. The preparation method of the perfluoro-2-alkoxy propionyl fluoride comprises the following steps: carrying out addition reaction on acyl fluoride and hexafluoropropylene oxide in a polar aprotic solvent in the presence of an organic base catalyst, a phase transfer catalyst and a phase transfer cosolvent to prepare the perfluoro-2-alkoxy propionyl fluoride, the phase transfer cosolvent is selected from a hexafluoropropylene dipolymer, a hexafluoropropylene tripolymer or 1, 3-bis (trifluoromethyl) benzene. The method provided by the invention can effectively reduce the generation of HFPO polymer by-products, thereby improving the yield of the target product.

The invention provides a solvent-assisted aminolysis method of a waste polyurethane material, which comprises the following steps: mixing a catalyst with an aminolysis reagent to form an aminolysis solution, mixing the aminolysis solution with an aprotic solvent, then adding the waste polyurethane material, and carrying out aminolysis reaction under a heating condition to degrade the waste polyurethane material. And separating the aprotic solvent and the aminolysis reagent from the degradation liquid, and cleaning the obtained solid product to obtain the degradation product of the waste polyurethane material. According to the method, the degradation temperature of the existing aminolysis method for degrading the waste polyurethane material can be reduced, and the degradation speed of the existing aminolysis method for degrading the waste polyurethane material can be increased. The invention also provides a method for preparing the supramolecular adhesive by recovering the degradation product of the waste polyurethane material, which comprises the following steps: fully mixing the degradation product of the waste polyurethane material obtained by the method with the polyphenol compound at 60-120 DEG C to obtain the supramolecular adhesive. According to the method, the aminolysis temperature of the waste polyurethane material can be reduced, and the reutilization operation of the waste polyurethane degradation product is simplified.

The invention belongs to the technical field of two-dimensional material preparation, and particularly relates to a two-dimensional fullerene covalent network, an electrochemical synthesis method and a photoelectric detector. The method comprises the following steps: by taking a fullerene superlattice material as a cathode, an inert material as an anode and a mixed solution of quaternary ammonium salt containing hydrogen protons and a polar aprotic solvent as an electrolyte solution, performing electrochemical stripping under constant potential to obtain a large batch of two-dimensional fullerene networks within a short time. Based on intercalation and expansion of layered fullerene superlattices, in combination with an in-situ reduction assisting effect of solvated protons at the edge of Mg4C60 crystals, quaternary ammonium salt cations are electrically driven to perform rapid intercalation expansion, generated hydrogen bubbles destroy relatively strong interaction force between layers, rapid and uniform intercalation of the quaternary ammonium salt cations between the layers is promoted, and the performance of the Mg4C60 crystal is improved. The stripping efficiency is as high as 83%, the single-layer stripping rate is as high as 30%, and the stripped two-dimensional C60 covalent network keeps a complete crystal structure and a large size.

An inhibited aqueous fertilizer composition and methods of use thereof.

The invention relates to a water-based thermal insulation coating. The invention discloses a water-based thermal insulation coating composition which comprises water-based resin, a coalescing agent and a thermal insulation agent. The water-based resin is selected from at least one of material groups consisting of acrylic resin, polyurethane resin and epoxy resin. The aqueous resin has a minimum film formation temperature of not less than 5 DEG C. The coalescing agent is selected from at least one of a material group consisting of a plasticizer, an alcohol ether solvent, an alcohol ester solvent, a mixed solvent of ethylene glycol monobutyl ether and dipropylene glycol butyl ether, and an aprotic solvent. And the heat insulation agent is hydrated silicon dioxide. Therefore, the water-based heat insulation coating has the technical effect of reducing carbon emission, can replace the traditional solvent type coating, and has a heat insulation function.

A method of recovering polyurethane polymer from a waste polymer textile material that comprises polyester and polyurethane fibers is described. The method comprises providing the waste polymer textile material in shredded or cut form; contacting the waste polymer textile material in shredded or cut form with a polar aprotic solvent at a temperature from 25 to 125°C to dissolve the polyurethane at least partly in the polar aprotic solvent while the polyester remains substantially unaffected; separating the polyester from the solvent mixture comprising the polar aprotic solvent and the polyurethane dissolved therein by solid-liquid separation; precipitating the dissolved polyurethane in the solvent mixture; separating the precipitated polyurethane from the solvent mixture to obtain polyurethane polymer and used polar aprotic solvent; and optionally reusing the used polar aprotic solvent.

The invention relates to the technical field of metal organic framework materials, and discloses a functionalized UiO-66 metal framework material as well as a preparation method and application thereof. The functionalized UiO-66 metal framework material is prepared from the following raw materials: a zirconium source, an organic ligand, a polar aprotic solvent and a regulator, the regulator comprises an organic acid and an alcohol. The functionalized UiO-66 metal framework material provided by the invention has the advantages of small particle size, large specific surface area, nanometer disordered pore structure, abundant crystal defects and good gas adsorption performance. The preparation method of the material is simple in steps, an organic acid and alcohol composite conditioning agent is added, the conditioning agent serves as a second connecting body and competes with organic ligands to coordinate with zirconium ions, and therefore the pore channel structure, the morphology size and the defect structure of the functionalized UiO-66 metal framework material are regulated and controlled, and the functional UiO-66 metal framework material is obtained by selecting different organic ligands. The UiO-66 metal framework material which is good in adsorption performance and is modified by different functional groups can be obtained.

The present disclosure relates to a method of polymerizing a polymer having an ester functional group, a catalyst for use in the method, and a composition for use in the method. More specifically, proposed is a method of depolymerizing a polymer having an ester functional group by using potassium carbonate (K2CO3) as a depolymerization catalyst and an alcohol and a polar aprotic solvent as solvents. In addition, a composition for depolymerizing a polymer having an ester functional group is proposed.

The present invention belongs to the technical field of compound preparation, and specifically relates to a method for preparing sodium bis(fluorosulfonyl)imide, which comprises at least the following steps: the first step is to add anhydrous formic acid to chlorosulfonic acid isocyanate, and stir the reaction to prepare chlorosulfonamide; the second step is to add an organic solvent to the chlorosulfonamide prepared in the first step, and then add sodium fluoride, and then add sulfuryl chloride in batches, and stir the reaction after the feeding is completed; the third step is to filter the reaction product obtained in the second step, remove the filter residue, and concentrate the filtrate under reduced pressure to remove the solvent to obtain a crude sodium bis(fluorosulfonyl)imide; the fourth step is to dissolve the crude product in a protic solvent for recrystallization, and then filter and dry under reduced pressure to obtain a pure sodium bis(fluorosulfonyl)imide. The process is not only simple to operate, but also has a short reaction time and a high yield, and can effectively control metal ion and anion impurities, and can prepare a high-purity target product of sodium bis(fluorosulfonyl)imide.

The invention provides a high-strength anti-ultraviolet regenerated PET fiber and a preparation method thereof. The preparation method comprises the following steps: in a nitrogen atmosphere, dissolving 2, 2 '-methylenebis [6-(benzotriazolyl)-tetramethylbutylphenol] and hexamethylene diisocyanate in N-methyl pyrrolidone, adding a catalyst for reaction, then heating to remove residual monomers, cooling, dropwise adding into ice methanol to separate out a product, washing, and carrying out vacuum drying to obtain an anti-ultraviolet auxiliary agent; the preparation method comprises the following steps: dissolving an anti-ultraviolet aid and hexamethylenediamine in an aprotic solvent, adding a catalyst, carrying out condensation reaction in a nitrogen atmosphere, and carrying out centrifugal washing and vacuum drying to obtain the anti-ultraviolet composite chain extender, the preparation method comprises the following steps: mixing an anti-ultraviolet composite chain extender with recycled PET fragments, adding an antioxidant, a hydrolysis-resistant solution and a lubricant, and carrying out blending spinning through a double-screw extruder to obtain the high-strength anti-ultraviolet regenerated PET fiber. According to the invention, through anti-ultraviolet-chain extension chemical bonding, the bottleneck that the strength and the function of the regenerated PET fiber are difficult to synergistically improve is broken through.

The invention discloses a method for preparing 1-chloro-2, 3, 3-trifluoropropene through resource utilization of 1, 1, 2-trifluoroethane, which comprises the following steps: (1) dehydrofluorination: 1, 1, 2-trifluoroethane is subjected to a dehydrofluorination process under the action of a gas-phase dehydrofluorination catalyst to obtain 1, 2-difluoroethylene; (2) telomerization: under the combined action of the prefluorinated telomerization catalyst, the accelerant and the polar aprotic solvent, telomerization is performed on the 1, 2-difluoroethylene and the dichlorofluoromethane to obtain 3, 3-dichloro-1, 1, 2-trifluoropropane; and (3) a dehydrochlorination step: carrying out dehydrochlorination on the 3, 3-dichloro-1, 1, 2-trifluoropropane to obtain the 1-chloro-2, 3, 3-trifluoropropene. The method has the advantages of easily available raw materials, high product selectivity, high purity, easiness in separation, suitability for industrial application and the like.

The present invention discloses a method for preparing furfural, which includes: under the action of a heteropolyacid-based phase transfer catalyst, an intramolecular dehydration reaction occurs for xylose-based carbohydrates in a ternary two-phase reaction medium composed of a low-boiling organic solvent, a protic solvent, and an ionic organic ammonium chloride. The catalyst used in the present invention has the property of phase transfer, that is, its solubility in the reaction medium increases at high temperature, and it catalyzes the dehydration of xylose in the form of a liquid acid; after the reaction, the solubility decreases and it precipitates in the form of a solid, which is convenient for the recovery and separation of the catalyst, and largely solves the problems of low efficiency of solid acid catalysts and difficult separation of liquid acid catalysts. And an advanced reaction medium is coupled to increase the solubility of xylose-based carbohydrates and the solvation effect on xylose. Through the optimization of the catalyst and the reaction medium, the reaction performance of the reaction system is effectively improved.

A pattern formation method may use a resist composition. The resist composition may include an organometallic compound represented by any one of Formulae 1-1 to 1-4, an additive represented by Formula 2, and a solvent. The solvent may include a non-polar solvent, a polar aprotic solvent, or a combination thereof.Refer to the specification for the descriptions of M11, L11 to L14, a11 to a14, R11 to R14, b11 to b14, Y11 to Y13, X11 to X13, Y21, Y22, L21, and a21 in Formulae 1-1 to 1-4 and 2.

The invention relates to the technical field of high-molecular polymerization and molding, in particular to a modified para-aramid stock solution, a preparation method and para-aramid fibers.The preparation method comprises the steps that under the inert gas condition, diamine and a chlorosilane polycondensation agent react in a weakly-alkaline polar aprotic solvent, and a silanization modified diamine solution is obtained; the diamine comprises diaminodiphenyl ether and p-phenylenediamine; adding paraphthaloyl chloride into the silanization modified diamine solution to carry out a copolymerization reaction, and after the reaction is finished, carrying out neutralization treatment to obtain the modified para-aramid stock solution. According to the preparation method of the modified para-aramid stock solution, the modified diamine does not need to be independently purified, the high-viscosity modified para-aramid stock solution can be directly obtained, and the modified para-aramid stock solution is high in polymer specific concentration logarithmic viscosity and high in molecular weight, so that a high-quality and stable-quality para-aramid fiber product is more favorably obtained.

The invention relates to the technical field of chemical substance detection, in particular to a lipid in-situ mass spectrometry method and device based on online selective enrichment-photoanalysis, and the method comprises the following steps: (1) extracting lipid in a sample into an alkaline protic solvent by adopting an in-situ liquid extraction technology to obtain an in-situ extraction system solution; (2) sucking the in-situ extraction system solution through a transmission pipeline under vacuum or negative pressure, and leading the in-situ extraction system solution to a mass spectrum for mass spectrum detection, wherein a titanium dioxide nano-particle coating is arranged in the transmission pipeline; and (3) after the lipid mass spectrum band in the in-situ extraction system solution is completely subjected to mass spectrum detection, irradiating the titanium dioxide nano-particle coating by adopting an ultraviolet lamp, continuously introducing the alkaline protic solvent, sucking the alkaline protic solvent through a transmission pipeline, and introducing the alkaline protic solvent to a mass spectrum for mass spectrum detection. According to the method disclosed by the invention, online selective enrichment of glycolipid can be realized while in-situ liquid extraction is carried out, meanwhile, the glycosphingolipid is directly analyzed by using ultraviolet light under the condition that solvent switching is not needed, the analysis rate of the glycosphingolipid on the surface of titanium dioxide and the operation convenience are greatly improved, and finally, the detection sensitivity of the glycosphingolipid is improved.

The invention also is directed to a new process for making the bis-polyisobutylene alcohol amine by reacting a polyisobutylene epoxide with a polyamine, optionally in the presence of a catalyst, a protic solvent initiator and / or a diluent. In addition, the invention further relates to the many uses of the bis-polyisobutylene alcohol amine including but not limited to its use in lubricants, surfactants, emulsifiers, resins, and the like.

The invention relates to a synthesis method of milobalin or acid salt thereof, and belongs to the technical field of medicine synthesis. In order to solve the problem that chiral resolution needs to be adopted in the prior art, the invention provides a synthesis method of miloabalin or an acid salt thereof, which comprises the following steps: under the action of an organic strong base, carrying out Michael addition reaction on a compound shown as a formula III and acetonitrile in a non-polar organic solvent at a low temperature of-50 DEG C or below to obtain an intermediate product; under the alkaline condition, the intermediate product is subjected to an oxidation reaction and a hydrolysis reaction under the action of an oxidizing agent, after the reaction is finished, an intermediate product is obtained through acidification, and the intermediate product is subjected to a high-temperature decarboxylation reaction in an aprotic solvent to obtain a compound of a formula VI; and carrying out Hofmann degradation reaction on the compound of formula VI to obtain the compound of formula I miloabalin or miloabalin acid salt. The method has the advantages of high stereoselectivity, no need of chiral resolution operation, avoidance of the problem of large material loss caused by resolution, high chiral purity and high yield.

The invention belongs to the technical field of organic synthesis, and particularly relates to a preparation method of octocrylene serving as a main component of a sun-screening agent. The invention provides a preparation method of octocrylene serving as a main component of a sun-screening agent, which comprises the following steps: dissolving benzophenone in a polar aprotic solvent, adding zinc powder, heating to 50-70 DEG C under an inert condition, and dropwise adding 2-bromo-2-ethyl cyanoacetate for reaction to obtain a solution containing an intermediate etocrylene; under an ice bath condition, acidifying the solution containing the intermediate etocrilene by using a protonic acid aqueous solution, adding isooctanol, and slowly heating to 15-30 DEG C for reaction; and after the reaction is finished, extracting, washing, drying, filtering and concentrating the reaction liquid to obtain the octocrylene. According to the preparation method, reaction steps are reduced, the preparation process is simple, the operation method is convenient and fast, high-purity octocrylene can be obtained without purifying an intermediate, and large-scale industrial production is facilitated.

The invention provides a stripping method of a negative pole piece in a metal battery and a testing method of the metal battery. The stripping method comprises the following steps: disassembling the metal battery to obtain a negative pole piece with a diaphragm on the surface; the negative pole piece comprises an active metal layer; applying the treating fluid to the negative pole piece with the diaphragm on the surface, enabling the treating fluid to at least act on an interface between the active metal layer and the diaphragm, and stripping the negative pole piece from the diaphragm; wherein the treating fluid comprises a polar aprotic solvent, the dielectric constant of the polar aprotic solvent at 25 DEG C is larger than or equal to 7, and the standard reduction potential of the polar aprotic solvent relative to a standard hydrogen electrode is smaller than-1.1 V. According to the stripping method, the risks of metal adhesion and oxidation blackening can be reduced, the deposition morphology integrity of the metal layer of the cathode pole piece obtained by stripping is improved, and the accuracy of judging the metal deposition condition on the cathode interface of the metal battery is improved.

The invention relates to a preparation method of a lithium difluoro-bis (oxalate) phosphate concentrated solution, the lithium difluoro-bis (oxalate) phosphate concentrated solution is composed of lithium difluoro-bis (oxalate) phosphate and an aprotic solvent, the aprotic solvent comprises any one or a combination of at least two of diethyl carbonate, ethyl methyl carbonate, ethylene carbonate or propylene carbonate, the concentration of the lithium difluoro-bis (oxalate) phosphate in the lithium difluoro-bis (oxalate) phosphate concentrated solution is 10-35 wt%. The lithium difluoro bis (oxalate) phosphate concentrate provided by the invention exists in a non-proton electrolyte state, so that an evaporative crystallization process is omitted, and the production cost is reduced; the product transportation cost can be reduced through pipeline transportation; and compared with a lithium phosphate solid difluoro bis (oxalate), the process of re-dissolution during use is omitted, the risk of impurity introduction is avoided, and the use cost is reduced.