184 results about "Residual solvent" patented technology

The invention relates to the technical field of membrane separation, in particular to a composite forward osmosis membrane based on mussel bionic interface enhancement and a preparation method thereof. The preparation method comprises the following steps: immersing a base material in a dopamine hydrochloride solution for oscillation reaction to obtain a modified base material; the surface of the modified base material is coated with a membrane casting solution in a blade coating mode, then phase inversion is carried out, the residual solvent is removed, then airing is carried out, and the composite forward osmosis membrane based on mussel bionic interface enhancement is obtained. By introducing the mussel bionic polydopamine intermediate layer, the long-standing technical contradictions of poor interfacial compatibility and weak binding force between the hydrophobic substrate and the hydrophilic separation layer are ingeniously solved, and the internal concentration polarization effect is remarkably inhibited. The prepared composite membrane has the advantages of high water flux, low salt reverse flux, stable structure and the like, and has wide application prospects in the fields of water treatment and substance separation.

The invention discloses a preparation method and application of a polymer membrane based on solvent in-situ functionalization enhancement. The method comprises the following steps: dissolving a polymer raw material by adopting a polymerizable solvent to form a homogeneous membrane casting solution; then synchronously carrying out ultraviolet light induced polymerization on the residual solvent in the membrane in the membrane casting liquid phase separation forming process by utilizing a constant-temperature circulating coagulating bath carrying an ultraviolet light illumination system; performing drying treatment to obtain a flat plate / hollow fiber composite membrane; the method is applied to the aspects of seawater desalination, wastewater treatment, food processing, biological medicine, energy chemical industry and the like. By utilizing dual functions of the solvent, polymerized solvent molecules and macromolecular chains form a stable cross-linked interpenetrating network structure, functional design of the membrane is realized through customizability of the solvent, functionalization enhancement of the membrane is realized while the process is simplified, ultraviolet polymerization synchronously optimizes phase separation kinetics, and the performance of the membrane is improved. Uniform surface pore size distribution and efficient mass transfer channels are formed, and the advantages of high efficiency and customizability are shown.

The invention relates to the technical field of liquid chromatographic analysis, and discloses a data acquisition method and system of a liquid chromatograph. The method comprises the following steps: extracting chromatograms without solvent residues and with known solvent residues from a historical database, and training by using a self-encoding neural network and a convolutional neural network to generate a baseline reference model and a ghost peak early warning model; obtaining solvent parameters of the previous analysis method, and calculating the residual solvent concentration through residual solvent information; inputting the residual solvent concentration into the baseline reference model and the ghost peak early warning model, and calculating to obtain a baseline drift prediction correction value and a ghost peak prediction risk area; pre-correcting the chromatographic signal acquired in real time to obtain a purified chromatographic signal; performing qualitative and quantitative analysis on the purification signal according to dynamic allocation resources of the ghost peak risk area to generate final chromatographic data; the data interference of the mobile phase residue is effectively eliminated, and the accuracy of data acquisition is improved.

The invention belongs to the field of high polymer material synthesis, and provides a method for preparing polyphenylene sulfide from high-purity p-dichlorobenzene, which adopts the whole process design of pre-construction of a composite sulfur source intermediate, regulation and control of an end group controllable oligomerization polyphenylene sulfide intermediate, segmented polymerization of the high-purity p-dichlorobenzene and precise dehydration-washing-drying. The ultra-low impurity level of 0.05-0.25 wt% of burning residues of the polyphenylene sulfide product, the sodium ion content of 10-200 mg / kg and the chloride ion content of 10-500 mg / kg is achieved, and meanwhile the high-performance stability of the melting point of 270-300 DEG C, the gel fraction of 92-99 wt% and the water content of 0.01-0.20 wt% is kept. The problems of deep removal of inorganic ions and ash content, balance of gel fraction and processability and control of residual solvents in the traditional polyphenylene sulfide preparation process are solved, and the method has wide application value in the fields of high-performance engineering plastics, special fibers, electronic packaging materials and the like.

The invention relates to the field of PCB transfer, in particular to a transfer trolley for PCB production and processing. According to the transfer trolley, a closed space is formed by a sleeve shell and an electric control lifting cabin and used for preventing harmful chemical gas from leaking outwards, hot air flow is conveyed to all layers of PCBs through an air heater so as to accelerate volatilization of residual solvents and the harmful chemical gas, then volatile matter is pumped to an activated carbon layer through an exhaust fan to be adsorbed, and through the process, the residual solvents and the harmful chemical gas can be recycled. According to the PCB stacking device, the PCB residual solvent can be rapidly volatilized and harmful gas can be collected and treated synchronously in the transferring process, and in addition, the stacking operation of all PCBs in the electric control lifting cabin can be rapidly completed by pulling open the side supporting plates between the C-shaped inserting rails; the technical problem that each PCB transfer trolley needs to be parked for a long time to wait for a PCB to wait for volatilization of a residual solvent, and the use efficiency of the PCB transfer trolley is seriously affected is solved.

The invention discloses a health food quality safety tracing system based on a block chain. According to the system, an optimization model taking health food quality risk assessment as a target is constructed; selecting the total number of bacterial colonies, the number of pathogenic bacteria, solvent residues, water activity, temperature, air pressure, granularity, mixing uniformity, effective component quantification, dissolution rate, residual oxygen amount and the like as core parameters, and constructing an optimized objective function; in addition, the system monitors and adjusts key parameters such as the temperature, the air pressure, the granularity and the residual oxygen content of the health-care food in real time through the AI driving module, and the food safety coefficient is improved; according to the invention, the conversion from passive supervision to active prevention is realized, the food qualification rate and the resource utilization rate are improved, and the method can be used for links of food production, transportation, sales and the like.

The invention discloses a polyolefin graft modification method based on coating and photochemical reaction, which comprises the following steps: step 1, raw material preparation: mixing 20-50 parts by weight of glycidyl methacrylate (GMA), 1-5 parts by weight of benzophenone (BP) and 1-2 parts by weight of triethylamine (TEA), and uniformly stirring to obtain a mixed solution; 2, coating: coating the surface of a polyolefin film with the mixed solution obtained in the step 1, wherein the coating weight is 1g / m < 2 >-3g / m < 2 >; the method has the beneficial effects that a peroxide initiator is not needed, the reaction is initiated by ultraviolet light, the reaction condition is mild, polyolefin degradation and side reaction are reduced, and the grafting rate is greater than 3.5%; ethyl acetate and other low-toxicity solvents are adopted, residual solvents can be removed through oven treatment, and the environment-friendly requirement is met; active groups such as an epoxy group are introduced into a grafted product, so that the compatibility with a polar material is remarkably improved, and the breaking strength is improved by more than 50% compared with that of common PP; the polyolefine can be used as an interface compatibilizer, a macromolecular coupling agent and the like, and the application of the polyolefine in the high-end field is expanded.

The objective is to provide 5-aminolevulinic acid or its salts and a method for producing the same, which have fewer impurities and residual solvents and suppressed discoloration compared to conventional methods. The objective is to provide 5-aminolevulinic acid or its salts, wherein, based on peak area obtained by HPLC analysis, the ratio of the content of individual impurities to the content of 5-aminolevulinic acid or its salt is 0.0007 or less, and the sum of the ratios of the content of individual impurities to the content of 5-aminolevulinic acid or its salt is 0.0016 or less.

The invention discloses a crystal form and a preparation method of Alalistrum hydrochloride, the crystal form comprises a crystal form Form3, a crystal form 4 and a crystal form Form11, Alalistrum hydrochloride solids Form3 (methanol-water composite solvate), Form4 (hydrate) and Form11 can be obtained by mixing and dissolving Alalistrum hydrochloride solids and an organic solvent, and then adopting the modes of crystallization, crystal mush and volatilizing, and the Alalistrum hydrochloride solids Form3 (methanol-water composite solvate), Form4 (hydrate) and Form11 can be obtained by using the crystal form of Alalistrum hydrochloride and the preparation method of the crystal form of Alalistrum hydrochloride and the preparation method of the crystal form of Alalistrum hydrochloride. The preparation method disclosed by the invention is simple in process, strong in operability, high in yield, high in purity and good in crystallinity, and the crystal form disclosed by the invention is high in solubility, few in residual solvent and good in solid property and meets the medicinal development standard.

The utility model discloses a polymerization system for dehydration condensation reaction, which belongs to the technical field of polymer production and comprises a polymerization reaction kettle, a through hole is arranged at the top of the polymerization reaction kettle, a tower column is vertically arranged on the through hole, the tower column comprises a plurality of tower sections which are sequentially communicated from top to bottom, and fillers are arranged in the tower sections. A tower cap is arranged at the top end of the tower section located at the uppermost end of the tower column, a cooling jacket and a thermometer are arranged on the tower cap, a gas phase outlet is formed in the upper portion of the tower cap and connected with a water removal tank, a gas outlet in the top of the water removal tank is connected with a recovery device, and a vacuum pump is connected to the tail end of the recovery device in the running direction of the recovery device; the vacuum pump is connected with a PLC. By utilizing the tower column, a solvent and a monomer with high boiling points are condensed, and water and impurities with lower boiling points leave the tower column, so that the raw material waste is reduced while the reaction is promoted; a water removal tank is arranged to absorb moisture in gas, so that the moisture in the gas is prevented from condensing when residual solvents and monomers are condensed in the recovery device, and the separation effect is not influenced.

The invention belongs to the technical field of pharmaceutical analysis, and particularly relates to a method for determining a residual solvent in LXH-1211 by adopting headspace gas chromatography. Preparing a reference solution and a test solution of the LXH-1211, respectively carrying out headspace equilibrium on the blank solution, the reference solution and the test solution, injecting the solutions into a gas chromatograph in a headspace sample injection manner, recording a chromatogram, and calculating the content of the residual solvent in the test solution by peak area according to an external standard method; wherein the residual solvent is one or more of methanol, ethanol, dichloromethane, dioxane, N, N-diisopropylethylamine or N, N-dimethylformamide. The method is high in sensitivity, good in repeatability and high in accuracy, and can be used for simultaneously detecting the contents of various residual solvents in the LXH-1211, so that the quality of the LXH-1211 is ensured, and the safety of clinical medication is improved.

The invention relates to the technical field of laser welding, in particular to self-adaptive laser welding equipment. According to the technical scheme, the device comprises a machining table, a transverse guide rail is fixedly connected to the top end of the machining table, and an adjusting frame is installed at the top of the transverse guide rail. By arranging a scraping structure, multiple sets of scraping blocks can be driven to rotate through rotation of a cleaning disc, and impurities on the surface of a metal plate are scraped through waterproof abrasive paper arranged on the scraping blocks; by arranging the softening structure, a small amount of solvent can be quantitatively added to the metal plate to soften impurities such as oil stains on the metal plate, the softening efficiency is improved by cooperating with the solvent adsorption of the erasing block, and by arranging the erasing structure, the residual solvent and impurities on the surface of the metal plate can be cleaned, so that the surface of the metal plate is kept clean and tidy; and the problem that oil stains or oxidation films on the surfaces of the metal plates can generate adverse effects on welding is solved.

This application discloses a novel tail gas absorption and desorption system for soybean oil extraction, comprising: an identification module, an absorption module, a magnetic field module, and a feeding module. The identification module is used to identify hazardous substances, and the specific identification steps are as follows: real-time acquisition of risk data, calculation of migration risk index based on risk data, and adjustment of absorption parameters according to migration risk index; acquisition of pressure data and valve status data of the absorption tower in the absorption module, calculation of escape risk index, and classification of escape risk level according to escape index; monitoring of residual solvent concentration in tail gas, adjustment of spray volume and centrifuge status according to residual solvent concentration, and automatic switching of treatment scheme according to the magnitude of migration risk index through a graded treatment mechanism, thereby achieving effective control and removal of hazardous substances in degummed oil, reducing hazardous substance residue, and improving the quality and safety of degummed oil.

The invention discloses a high-strength sealing material for vehicles as well as a preparation method and application thereof, and belongs to the technical field of high polymer materials. The sealing material is prepared by the following steps: mixing polytetrahydrofuran ether glycol and hydroxyl-terminated polydimethylsiloxane, carrying out vacuum dehydration, cooling, adding diphenylmethane diisocyanate under the protection of nitrogen, adding surface modified nano mica sheets, cellulose nanocrystals and part of a solvent after the reaction is finished, uniformly mixing, and carrying out vacuum drying to obtain the sealing material. Then adding an ultraviolet absorbent, an antioxidant and the residual solvent, and mixing to obtain a functional polyurethane prepolymer mixture; dissolving a chain extender, an organic bismuth catalyst and an accelerant in an ethyl acetate solvent to obtain a curing agent mixed solution; and mixing the functional polyurethane prepolymer mixture with the curing agent mixed solution to obtain the functional polyurethane curing agent. The flexible siloxane chain segment and the modified filler are embedded into the polyurethane matrix, so that the material has excellent hydrophobicity, toughness, mechanical strength and sealing performance.

The invention relates to the technical field of crystal structure prediction, and discloses a quantum algorithm-based energetic CxNyOz crystal structure prediction method, which comprises the following steps of: calculating an evaporation and diffusion dimensionless number and capillary pressure by obtaining surface tension, a contact angle, a geometric feature scale, temperature, partial pressure, a diffusion coefficient and an evaporation rate; establishing a residual solvent mole fraction and solvent chemical potential sequence; constructing a binary layer occupancy model Hamiltonian containing layer occupancy energy, adjacent layer action energy, a capillary pressure volume term and a molecular polarity action term, and obtaining a hierarchical occupancy number by using a quantum approximation optimization algorithm; calculating interlayer respiration and shear frequency and mode volume sensitivity based on a quantum variation algorithm; and finally, the lattice spacing and the prediction result are obtained through cost functional minimization, and accurate prediction and quantitative analysis of the structure of the energetic crystal under the unbalanced desolvation condition are realized.

This invention discloses a stirred synthesis method for the production of 5-methyluridine, comprising the following steps: S1. forming a homogeneous initial reaction system; S2. obtaining a uniformly mixed intermediate reaction system with consistent temperature distribution; S3. obtaining a final reaction system; S4. obtaining a crystallization-inducing system; S5. obtaining a crystal-mother liquor suspension system; S6. obtaining a mature suspension system with completed crystal growth; S7. stopping depressurized bubbling and gradually reducing the shear pulse amplitude while maintaining low-speed three-dimensional suspension flow field stirring to age the crystals, obtaining an aged crystal suspension system; S8. terminating stirring to obtain the target product, 5-methyluridine crystals. After drying, the residual solvent content of 5-methyluridine in this invention is less than 0.05%, and its color and melting point meet pharmaceutical-grade standards.

The invention belongs to the technical field of metal battery negative electrode materials, and particularly discloses a sulfur-doped hard carbon material and a preparation method and application thereof. The preparation method of the sulfur-doped hard carbon material comprises the following steps: dissolving chitosan in methanesulfonic acid, and uniformly mixing; adding into diethyl ether until white powder is hydrophobically dissolved out; then removing the residual solvent in the white powder to obtain sulfated chitosan; and finally calcining the sulfated chitosan to obtain the product. A sulfur oxyacid radical molecular template method is adopted, a template is effectively anchored on a biomass chain through a chemical reaction between the template and biomass, in the subsequent high-temperature pyrolysis process, the molecular template is decomposed and self-sacrifice, sub-nano pores are reserved in situ, and effective heteroatom doping is further carried out on the surfaces of the pores. When the composite material is applied to a sodium ion battery as a negative electrode, the occurrence of electrolyte-carbon negative electrode interface side reaction can be effectively inhibited, reversible adsorption and desorption of sodium ions in a carbon matrix are promoted, and extremely high first-circle coulombic efficiency can be shown and can reach 100%.

This invention relates to the field of glycerol purification technology, specifically to a multi-stage distillation purification method for pharmaceutical-grade glycerol. Using industrially synthesized crude glycerol as raw material, the pretreated material is obtained through heating and degassing. Then, a first-stage molecular distillation removes low-boiling-point impurities, yielding an intermediate product. A second-stage molecular distillation further refines the product, collecting the gaseous glycerol fraction. Finally, under nitrogen protection, trace colored substances and residual polar impurities are removed through an adsorbent bed. After cooling, pharmaceutical-grade glycerol is obtained. Finally, the product is filtered and aseptically filled. This invention effectively removes aldehydes and ketones, residual solvents, and trace impurities from synthetic glycerol through the coupling of two-stage molecular distillation and adsorption processes. The resulting product has a purity ≥99.7%, total aldehyde and ketone impurities ≤0.005%, residual solvent ≤0.001%, bacterial endotoxin <2.5 EU / g, and batch-to-batch RSD <1%, meeting the standards for injection and suitable as an excipient in high-end pharmaceutical preparations.

The present application provides a substrate processing liquid, a substrate processing method, and a substrate processing apparatus, which have excellent drying properties and can remove liquid attached to the surface of a substrate well. In the present application, the substrate processing liquid includes a sublimable substance, a solvent that dissolves the sublimable substance, and an additive that disperses particles of the sublimable substance exceeding the solubility in the solution obtained by dissolving the sublimable substance in the solvent. Therefore, the particles of the sublimable substance exceeding the solubility are uniformly dispersed and dissolved in the solvent in the substrate processing liquid. As a result, the sublimable substance supplied to the pattern formation surface of the substrate is more than in the prior art, and there are a large amount of sublimable substances (solid phase) in the inside of the pattern. As a result, the residual solvent between patterns can be effectively suppressed, and sublimation drying can be performed in a state in which the pattern is firmly held by the sublimable substance (solid phase).

The application provides a method for reducing residual solvent of lithium bisfluorosulfonylimide, to solve the technical problems of poor removal effect of residual ester reagent in lithium bisfluorosulfonylimide and low yield in the prior art. The method comprises the following steps: (1) dissolving lithium bisfluorosulfonylimide with residual solvent in a good solvent to prepare a solution; (2) adding a first poor solvent to the solution to prepare a mixed solution; (3) evaporating the good solvent from the mixed solution under negative pressure to obtain a dispersion; (4) filtering the dispersion to remove the poor solvent and obtain a primary product; (5) washing the primary product with a second poor solvent, and filtering the second poor solvent to obtain a secondary product; and (6) performing negative pressure drying treatment on the secondary product. The method can remove the residual ester solvent in lithium salt, realizes the effect of reducing residual solvent, and has high lithium salt yield and is simple and easy to implement.

The invention discloses a refining method of medicinal guanine, and relates to the technical field of chemical medicine purification. The method comprises the following steps: complexing and dissolving a guanine crude product and a purifying reagent (such as hydrochloric acid or glacial acetic acid) in a refining solvent; concentrating or cooling to obtain a complex solid; heating and refining in a specific organic solvent (such as ethanol and methanol) to deeply remove organic impurities, ammonium salt and other impurities; and finally, neutralizing the refined complex in purified water by using alkali, separating out high-purity guanine crystals, and filtering and drying to obtain a final product. Through multi-step synergistic purification, the problems of insufficient product purity, excessive organic impurities, excessive ammonium salt, residual solvent and the like in the traditional method are effectively solved, the purity of the obtained guanine is greater than or equal to 99.9%, the ammonium salt is less than or equal to 0.001%, the guanine meets the medicinal requirements, the process conditions are mild, and the industrial production is easy.

The object of the present invention is to provide a thin film for a solid-state battery which, due to its low residual solvent content, has a less detrimental effect on the performance of the solid-state battery and can be produced by a continuous roll-to-roll coating process. The present invention relates to a thin film for a solid-state battery 100, comprising solid electrolyte particles 110 and crystalline fluororesin 120 and 130, which binds the solid electrolyte particles 110 together, wherein at least a portion 130 of the crystalline fluororesin has a fibrous form and the content of volatile components, measured by a gas analyzer, is 10 ppm by mass or less.

The application discloses a preparation method of high-light water-based aluminum silver paste self-laminating paint, relates to the technical field of paint preparation, and comprises the following steps: adding water-based resin and modified silicon resin into a high-speed dispersion kettle, preliminarily mixing the water-based resin and the modified silicon resin after stirring to form a resin base, adding organic silicon additives, a thickening agent and a pH regulator into the resin base in sequence, stirring and adjusting the viscosity and the pH value of the system, immersing a substrate to be coated in an alkali solution of hydroxyl ions to remove surface grease and a loose layer, washing the substrate with water, immersing the substrate in an acid solution of hydrogen ions for treatment, finally washing the substrate with water and drying the substrate, removing residual solvents and moisture from the cooled reflection layer by soft drying, and obtaining the water-based aluminum silver paste paint with a self-laminating structure. According to the preparation method, the high-light water-based aluminum silver paste paint with the self-laminating structure is prepared by optimizing filler modification, resin proportioning, surface treatment and heating processes, and the paint can provide excellent reflection performance, and ensure the stability, uniformity and adhesion of the coating.

The application relates to a molybdenum sulfide quantum dot doped crosslinked ethyl cellulose film prepared by a molybdenum sulfide enhanced ultrasonic assisted phase inversion method and a preparation method and application thereof. The film is a high porosity, uniform porous sponge-like film structure, and the preparation comprises the following steps: (1) putting a proper amount of ethyl cellulose raw material into a polar aprotic solvent to prepare an ethyl cellulose solution; (2) putting a dialdehyde reagent and molybdenum sulfide into the solution and stirring uniformly to prepare a molybdenum sulfide / crosslinked ethyl cellulose casting solution; (3) using a scraper to scrape the casting solution on a support plate to form a liquid film with uniform thickness; (4) opening the ultrasonic switch of a coagulation bath, and placing the support containing the liquid film in the coagulation bath to perform molybdenum sulfide enhanced ultrasonic assisted phase inversion; (5) taking out the film, and immersing the film in water to remove residual solvents; and (6) taking out the film, and performing freeze drying to obtain the film. The molybdenum sulfide / crosslinked ethyl cellulose film has high retention rate and high flux, and can be used as a high-performance separation membrane material.

An extractor apparatus that incorporates an autoclave that defines an interior, which extends along a longitudinal axis between opposite media inlet and discharge ports. Also included is a feed assembly that is coupled to the inlet port to supply media during operation to the interior, which establishes a media bed movable about the longitudinal axis through the interior to the discharge port. Further incorporated is a solvent supply that is coupled to the autoclave proximate the discharge port to establish during operation pressurized solvent cross flow that is directionally opposite the direction of movement of movable bed. An extract port is also included, which is coupled to the autoclave proximate the inlet port to extract cross-flowed solvent from the movable media bed during operation. Further included is a capture assembly that is sealingly coupled to the discharge port and which during operation, captures spent media, and is movable to discharge the spent media. The capture assembly may also extract residual solvent from the spent media, which may be communicated to the interior between the inlet and discharge ports.

The application discloses a preparation method of a high-refractive spectral regulation type composite optical film, which comprises the following steps: adding organic solvent and deionized water into a reactor, then adding complex acid to adjust the pH value of the reaction solution, and obtaining a mixed solvent; adding organic resin into the mixed solvent and fully stirring to uniformly dissolve; then adding a silane coupling agent, and under the condition of continuous stirring, adding titanium acid tetraisopropyl ester, a titanium oxide precursor, into the reactor to perform a hydrolysis reaction, and obtaining a hybrid sol; performing rotary evaporation on the hybrid sol to remove the contained solvent; adding a photocuring agent and uniformly mixing, coating the mixture onto a PC substrate, removing the residual solvent, curing with an ultraviolet lamp, and obtaining a product. The composite optical film prepared by the preparation method has ultraviolet-blue selective blocking function, and the overall refractive index of the material is improved, the preparation process is simple, and the method is suitable for large-scale application.

The application discloses a kind of testing methods of residual solvent in chemical fiber, it is related to chemical fiber testing technical field, including reaction box, the top position of the reaction box is provided with cover plate, the side of the reaction box is fixedly connected with handle, the front and rear sides of the reaction box are fixedly connected with side plate, a pair of rod body is fixedly connected on the side plate;It also includes docking assembly, limiting component and shaking assembly, the docking assembly is arranged on the front and rear sides of the reaction box for fixing the use of the reaction box, the limiting component is arranged on the docking assembly and is used in cooperation, the shaking assembly is arranged on the bottom plate and is used in cooperation with the reaction box.The application has reasonable structure, the reaction box can be installed and disassembled by docking assembly, the limiting component is used in cooperation with docking assembly, finally the chemical fiber and methanol in the reaction box are fully mixed and reacted by shaking assembly, which facilitates extraction detection in later period.

The utility model discloses a reaction kettle for settling and purifying deep ultraviolet (DUV) photoresist resin, which belongs to the technical field of photoresist and comprises a first jacket kettle, a second jacket kettle and a third jacket kettle, the first jacket kettle, the second jacket kettle and the third jacket kettle are sequentially connected in series. Most of DUV photoresist resin in the prior art is a solid discharged material, a large number of residual solvents and residual unreacted substances exist, the subsequent photoresist performance, stability and batch-to-batch stability are seriously influenced, and the production efficiency is reduced due to the fact that the DUV photoresist resin is difficult to filter. According to the DUV photoresist resin amplification device, the problems that in the DUV photoresist resin amplification process, a large amount of residual solvents and residual unreacted substances exist, the environmental pollution amount is large due to synthesis exhaust, and filtering is difficult can be effectively solved.

The invention relates to the field of analytical chemistry, and particularly discloses a method for determining residual solvents N, N-dimethylformamide, dichloromethane, isopropanol, ethyl acetate, methyl tert-butyl ether, ethanol, acetone, tetrahydrofuran and ethylene glycol dimethyl ether in a litamilast raw material by adopting a headspace-gas chromatography method, and a method for determining residual solvents N, N-dimethylformamide, dichloromethane, isopropanol, ethyl acetate, methyl tert-butyl ether, ethanol, acetone, tetrahydrofuran and ethylene glycol dimethyl ether in a litamilast raw material by adopting a headspace-gas chromatography method. The method comprises the following steps of: detecting by using a capillary column with 6 percent of cyanopropyl phenyl-94 percent of dimethyl polysiloxane as a stationary liquid through headspace sample introduction gas chromatography and a flame ionization detector (FID). According to the method disclosed by the invention, nine residual solvents contained in the litamilast raw material can be completely separated in one system, the separation degree is greater than 1.5, the specificity is good, interference from blank solvents and other unknown impurities is avoided, the sensitivity is high, the detection accuracy is high, and the quality of litamilast can be effectively controlled.