647 results about "Deep eutectic solvent" patented technology

The invention relates to a phellinus igniarius mycelium fermentation product and a preparation method and application thereof, and the preparation method comprises the following steps: inoculating a phellinus igniarius mycelium seed solution into a sterile fermentation culture medium for culturing, carrying out solid-liquid separation, filtering a clear liquid through a membrane and sterilizing to obtain the phellinus igniarius mycelium fermentation product, the fermentation medium comprises the following components: a beet extract, a deep eutectic solvent and water. The beet extract and the deep-eutectic solvent are creatively adopted as culture medium components to prepare the phellinus igniarius mycelium fermentation product, the beet extract and the deep-eutectic solvent jointly provide nutrients needed by phellinus igniarius fermentation, meanwhile, the deep-eutectic solvent is used for regulating metabolism, and compared with a product obtained through fermentation of a traditional culture medium, the phellinus igniarius mycelium fermentation product has the advantages that the fermentation efficiency is high; the content of active ingredients in a fermentation product obtained by adopting the culture medium with the formula is remarkably increased, and the fermentation product is good in uniformity and high in stability, is a clear liquid in appearance, has no abnormal odor and has slight phellinus igniarius characteristic odor.

The invention belongs to the field of resource regeneration, and particularly relates to a method for separating and recycling copper, indium, gallium and selenium from a waste solar thin film battery. According to the method, the waste solar thin film cells are subjected to oxidizing roasting, deep eutectic leaching and extraction and reverse extraction, and high-quality conversion and purification of all valuable elements in the waste solar thin film cells to oxides of the valuable elements are achieved. According to the method, the process route is simple, high-selectivity extraction of indium is achieved through the synergistic effect of the deep eutectic solvent and P204, and meanwhile effective recovery of valuable elements such as copper and selenium is achieved. The recovered and prepared oxide can be widely applied to strategic emerging industries such as semiconductors, photovoltaics, aerospace, military and the like.

The invention discloses a natural eutectic solvent enhanced konjac glucomannan film as well as a preparation method and application thereof, and belongs to the technical field of food packaging. The konjac glucomannan film enhanced by the natural deep eutectic solvent, provided by the invention, comprises konjac glucomannan, the natural deep eutectic solvent and gallic acid modified MXene nanoparticles; the mass ratio of the konjac glucomannan to the natural eutectic solvent to the gallic acid modified MXene nanoparticles is (850 to 950) to (50 to 250) to (10 to 40). Through the synergistic effect of all the components, the defects that KGM is insufficient in intrinsic mechanical strength, weak in antibacterial and antioxidant performance and poor in moisture resistance are overcome, the comprehensive performance of the film is remarkably improved, and the film can be used for cold-chain packaging of high-value fresh food and has environment friendliness and functional practicability.

The invention provides a lignin extraction-sulfonic acid modification integrated preparation method based on eutecticevaporate solvent coupling microwaves, lignin sulfonate and application, and belongs to the technical field of oilfield chemistry. The preparation method comprises the following steps: mixing choline chloride, epichlorohydrin and 4-hydroxybenzenesulfonic acid, heating and stirring to obtain a deep eutectic solvent ternary system; the method comprises the following steps: adding biomass powder into a deep eutectic solvent ternary system, and reacting under a microwave condition; after the reaction is completed, filtering, and adjusting the pH value of the obtained filtrate to be neutral to obtain a mixed solution; and then adding an organic solvent into the obtained mixed solution for precipitation, filtering, washing and drying to complete lignin extraction-sulfonic acid modification. According to the method, in-situ grafting of sulfonic acid functional groups is realized in the lignin separation process through the ternary eutectic solvent in combination with microwave-assisted extraction, so that sulfonation modification of lignin is completed. After sulfonation modification, the obtained sulfonated lignin is applied to the drilling fluid, and the viscosity reduction effect can be achieved.

The invention relates to the technical field of biological agents, and discloses a passivating enzyme soluble concentrate and a preparation process thereof.The soluble concentrate takes a specially-designed multifunctional deep eutectic solvent as a unique carrier, and the solvent has the multiple functions of stabilizing enzyme conformation, resisting oxidation, providing plant metabolism and increasing energy and the like. An active component is composite passivating enzyme powder which is subjected to vacuum freeze drying, and is compounded with a plant-derived phloem conduction enhancer in a synergetic manner. The preparation process adopts a core strategy of curing first and then dissolving, and the enzyme freeze-dried powder is dispersed in the non-aqueous solvent under low-temperature mild conditions. By constructing a water-free environment and adopting an activity protection process, the problems that a traditional water-based enzyme preparation is unstable in storage and the activity is easy to lose are fundamentally solved, and meanwhile, the bioavailability is remarkably improved by virtue of a targeted conduction component. The preparation has the remarkable advantages of ultra-long stability at normal temperature, high initial enzyme activity and strong targeting property.

The invention belongs to the field of polymer electrolyte. Polyurethane (PU) which is high in strength, good in elasticity, convenient to form and capable of being self-repaired is selected as a substrate of the solid electrolyte. A deep eutectic solvent (DES) which can be copolymerized with the lithium salt is selected to enhance the polarity of the system and promote dissociation of the lithium salt, so that the conductivity of the solid electrolyte is improved. The invention provides a preparation method of a DES copolymerization modified self-repairing polyurethane-based solid electrolyte. The preparation method comprises the following steps: preparing a long-chain polyurethane prepolymer; preparing a self-repairing prepolymer; performing double-bond modification on the self-repairing prepolymer; preparing DES containing lithium salt and double bonds; uniformly mixing the self-repairing polyurethane prepolymer with the end capped by double bonds and DES (diethylbenzene sulfonate); pouring into a mold and curing to obtain the DES / polyurethane-based solid electrolyte membrane; and preparing the solid-state lithium battery. The solid electrolyte disclosed by the invention is free from slag falling and liquid leakage, capable of self-repairing, high in ion mobility, simple in preparation process, low in cost and outstanding in performance, and has a wide market application prospect.

The invention belongs to the field of chemical purification, and discloses a method and equipment for separating carbon tetrafluoride in nitrogen trifluoride through pressurized absorption of a deep eutectic solvent, and the method comprises the following steps: (1) increasing the pressure of nitrogen trifluoride crude gas to 0.5 MPa or above; (2) cooling the crude gas to below 40 DEG C through a crude gas feeding heat exchanger; (3) through the absorption tower, the crude gas entering from the tower kettle is in countercurrent contact with the eutectic solvent entering from the tower top, and the content of carbon tetrafluoride in the crude gas is reduced to 5 ppm or below; (4) reducing the content of carbon tetrafluoride in the eutectic solvent to be less than 1ppm through a two-stage flash tank; and (5) reducing the temperature of the eutectic solvent to be below 30 DEG C through a eutectic solvent discharging heat exchanger and a eutectic solvent cooler, and circulating the eutectic solvent back to the absorption tower from the bottom of the absorption tower. According to the method, the quality of the nitrogen trifluoride product can be improved, the carbon tetrafluoride impurity in the nitrogen trifluoride purity can be reduced to 5ppm, and the cost is low.

The invention discloses equipment and a process for efficiently and continuously extracting astaxanthin by a low-frequency microwave-assisted eutectic solvent method, and belongs to the technical field of bioactive substance extraction. The method for extracting astaxanthin by the low-frequency microwave-assisted eutectic solvent method comprises the following steps: performing low-frequency microwave pretreatment on a eutectic solvent to obtain a high-temperature pretreated eutectic solvent; cooling the pretreated eutectic solvent, then mixing the pretreated eutectic solvent with crustacean byproducts, performing eutectic solvent extraction treatment, performing ultrasonic-assisted extraction in the process, and then performing solid-liquid separation to obtain filtrate; mixing the filtrate with an extraction solvent, and extracting to obtain an extraction solvent phase containing astaxanthin and a eutectic solvent phase; and removing the extraction solvent in the extraction solvent phase containing the astaxanthin to obtain an astaxanthin product.

The invention relates to a method for preparing a single-crystal lithium-rich manganese-based positive electrode material by synergistically regulating and controlling a deep eutectic solvent and aluminum gradient doping, which comprises the following steps of: carrying out multi-stage aluminum gradient doping to prepare a single-crystal lithium-rich manganese-based positive electrode material by synergistically regulating and controlling the deep eutectic solvent and the aluminum gradient doping; multi-level regulation and control on the structure of the positive electrode material from the inside to the surface are realized; the formation of an inducible single-crystal structure is assisted by the deep eutectic solvent; through addition of phosphorus / boron-containing anions and microwave strengthening treatment, oxygen vacancy lattice repair is promoted; carbon in-situ coating treatment is realized by adding a carbon source, so that the conductivity and interface stability of the material are improved; and lithium defects caused by other steps can be compensated through pre-lithiation treatment, and the first coulombic efficiency is improved. And five parts are integrated, so that the structural stability, the electrochemical performance and the safety of the material are multiply improved.

The invention relates to the technical field of biological extraction, in particular to a preparation method of selenium polysaccharide in cardamine violifolia, which comprises the following steps: extracting selenium polysaccharide in cardamine violifolia by using a deep eutectic solvent as an extraction solvent and adopting an ultrasonic method, and removing protein in the selenium polysaccharide by using an isoelectric precipitation method and an enzymolysis method, thereby obtaining the selenium polysaccharide in cardamine violifolia. Removing water, enzymolysis product amino acid, inorganic selenium and other impurities by a membrane separation concentration system to obtain cardamine violifolia selenium polysaccharide; wherein the eutectic solvent comprises choline chloride and malonic acid in a molar ratio of 1: 1-1: 3, and the water content is 40-60% (mass percent); the compound enzyme is prepared from bromelain and papain in a mass ratio of 1: 1. Protein in the selenium polysaccharide is removed by adopting deep eutectic solvent ultrasonic extraction and an isoelectric precipitation method combined with an enzymolysis method, enzymolysis product amino acid, inorganic selenium and other impurities are removed by adopting an ultrafiltration membrane separation and concentration system, the structure of the polysaccharide is not damaged, and the high-purity cardamine violifolia selenium polysaccharide is obtained.

The application belongs to the technical field of deep eutectic solvents, and particularly relates to a ternary deep eutectic solvent and preparation and application thereof. The ternary deep eutectic solvent is composed of choline chloride, 5-sulfosalicylic acid and gamma valerolactone according to a molar ratio of 1:4:(3-25). The strong hydrogen bond network structure between the green solvent system first destroys the ester bond between lignin and hemicellulose, then cuts off the beta-O-4 bond between lignin molecules, so as to separate lignin. Meanwhile, the deep eutectic solvent can improve the stability of carbon cations due to the conjugation effect between the lone pair electrons on the heteroatom oxygen and the central carbon in the molecular structure of gamma valerolactone, so as to inhibit the condensation reaction of lignin.

The invention provides a hydrated eutectic electrolyte as well as a preparation method and application thereof. The electrolyte comprises water-soluble zinc salt, deionized water and a deep eutectic solution, the deep eutectic solution is formed by mixing zinc perchlorate and a polar deep eutectic solvent and performing deep eutectic crystallization. The electrolyte has the characteristics of low water activity, low freezing point and efficient induction of uniform deposition of zinc, can be compatible with an iodine-loaded positive electrode and can inhibit dissolution of iodine, and the characteristics are beneficial to inhibition of hydrogen evolution reaction, polyiodine shuttling and other side reactions in the battery circulation process, promote uniform deposition of zinc, protect the integrity of an iodine electrode, and improve the electrochemical performance of the battery. The stable operation of the zinc-iodine battery is ensured; the electrolyte is a zinc sulfate solution containing a ZnClO4 / dimethyl sulfoxide deep eutectic solvent, the solution is combined with free water to form a eutectic structure, the eutectic structure participates in construction of a Zn < 2 + > ion solvation shell, extra intramolecular hydrogen bonds are introduced for the electrolyte, meanwhile, hydrogen bonds among water molecules are weakened, so that the internal energy of the electrolyte is enhanced, the freezing point is reduced, and the flowability is improved.

The invention provides a waste cotton fabric synchronous decolorization and cellulose dissolution regeneration method based on a deep eutectic solvent, and relates to the technical field of waste cotton fabric recovery treatment. According to the method disclosed by the invention, the in-situ decoloration of the dye in the cotton fabric and the efficient dissociation of a cellulose hydrogen bond network are synchronously realized under the process condition of 30-100 DEG C by selecting the specific eutectic solvent, so that the decoloration and the dissolution are cooperatively completed in the same step; and the problem of fiber damage or incomplete decoloration caused by condition conflict in step-by-step treatment is effectively avoided. On the basis, the dye and the eutectic solvent are synchronously replaced and separated in a coagulating bath by combining wet spinning, so that the process is simplified, and the high mechanical property of the regenerated cellulose fiber is realized. Besides, the dye and the deep-eutectic solvent in the process can be recycled, a resource full-circulation green technical path is formed, and a solution with a wide application prospect is provided for high-valued regeneration of the waste textiles.

The invention relates to the field of comprehensive utilization of biomass resources and preparation of high polymer materials, in particular to a green preparation method of high-deacetylation-degree chitin capable of recycling reaction waste liquid. The invention aims to solve the problems of serious environmental pollution, resource waste, low product purity and incomplete waste liquid recycling in chitin extraction. The method comprises the following steps: by taking crustacean biomass as a raw material, firstly carrying out high-voltage pulse electric field pretreatment to crush the tissue structure of the raw material and improve the reaction activity, and then heating and extracting in a choline chloride-lactic acid deep eutectic solvent system to realize efficient removal of proteins and inorganic salts in the raw material; according to the method, the chitin and the alkali liquor are subjected to a rapid deacetylation reaction by adopting microwave assistance and cooperating with the action of the phase transfer catalyst; according to the method, a waste liquid graded recycling system is adopted, hydrochloric acid in waste acid liquid generated by decalcification is recycled through electrodialysis, alkali liquid is recycled through ultrafiltration-nanofiltration double-membrane combination, deep eutectic solvent components are recycled through reduced pressure distillation, and recycling of acid, alkali and a solvent is achieved.

The present invention relates to the technical field of polymer preparation. Disclosed are a covalent organic framework material, and a preparation method therefor and a use thereof. The preparation method for the covalent organic framework material comprises the following step: subjecting an organic aldehyde and an organic amine to a condensation reaction in a deep eutectic solvent to obtain the covalent organic framework material, wherein the deep eutectic solvent is a two-component eutectic liquid composed of menthol and acetic acid. The temperature for the reaction is 25-120ºC, and the time for the reaction is 1-72 hours. The deep eutectic solvent composed of menthol and acetic acid used in the present invention has good dissolution properties for organic matters, and can also efficiently catalyze the condensation reaction between the organic amine and the organic aldehyde. The prepared covalent organic framework material exhibits high crystallinity and has good applications in the fields of adsorptive separation, heterogeneous catalysis, energy storage, etc. The present method has mild reaction conditions, simple operation, and good universality, is conducive to industrial large-scale production, and conforms to the concept of green chemistry.

A computerized system for prediction of antioxidant mixtures that is capable of receiving an initial dataset of a first set of deep eutectic solvents, create a predictive model according to the initial dataset; receiving an enhancement dataset and / or a second set of experimental deep eutectic solvents, modify the predictive model according to the enhancement dataset; modify the predictive model according to a comparison of a performance of the predictive model and a test dataset; generate functional deep eutectic solvents according to the predictive model, display the resulting mixtures, the resulting mixtures being DES integrating antioxidants mixtures, and, the resulting mixtures display improved antioxidant capabilities with respect to the corresponding (non-DES forms of the same) antioxidants.

The invention discloses a preparation method of a polymer adhesive capable of broad-spectrum adhesion based on a hydrogen bond-containing amphiphilic deep eutectic solvent of an acrylic acid derivative, and belongs to the technical field of polymer adhesives. The preparation method of the adhesive comprises the following steps: S1, mixing a hydrogen bond donor and a hydrogen bond acceptor, heating and stirring until the mixture is clarified to obtain a eutectic solvent; s2, adding an acrylate monomer and an acrylamide monomer into the eutectic solvent, and uniformly mixing to obtain a mixture; and S3, sequentially adding a chemical cross-linking agent and a photoinitiator into the mixture, and carrying out photo-initiation to obtain the adhesive. The adhesive prepared by the invention has the characteristics of high adhesive power, debonding as required, excellent waterproofness, efficient VOCs adsorption, adaptability to hydrophilic and hydrophobic materials and the like.

The invention discloses a washable, wear-resistant and uvioresistant polyarylate fiber as well as a preparation method and application of the washable, wear-resistant and uvioresistant polyarylate fiber. The method sequentially comprises the following steps: carrying out surface activation on fibers by adopting a deep eutectic solvent, spraying a TiO2 / organic ultraviolet absorbent UV1130 compound solution to construct an anti-ultraviolet layer, and carrying out interfacial polymerization by utilizing polyethyleneimine and trimesoyl chloride to form a polyamide encapsulation layer. The polyamide film can firmly coat the ultraviolet screening agent and anchor the ultraviolet screening agent on the surface of the fiber, so that the ultraviolet resistance of the polyarylester fiber is remarkably improved, meanwhile, the polyarylester fiber is endowed with excellent durability, the UPF retention rate is still higher than 90% after 10 times of standard washing or 200 times of friction, and the polyarylester fiber has excellent washing resistance and wear resistance. The process is simple, green and efficient, and the prepared composite fiber has wide application prospects in the fields of outdoor protection, intelligent spinning and the like.

The invention belongs to the technical field of active substance extraction, and discloses a method for extracting boxthorn leaf total flavonoids through an ultrasonic-assisted deep-eutectic solvent and application of the boxthorn leaf total flavonoids. Heating and mixing the hydrogen bond acceptor and the hydrogen bond donor, stirring to be transparent, and adding water to reduce viscosity to obtain the eutectic solvent; mixing the boxthorn leaf powder with a deep-eutectic solvent, performing ultrasonic extraction and centrifugation, and collecting supernate; adsorbing by using macroporous resin, washing and desorbing to obtain an eluent; and performing vacuum freeze drying to constant weight. According to the method disclosed by the invention, the eutectic solvent with low melting point and strong solubility is selected, the flavonoid compounds in the boxthorn leaves are green and efficiently extracted, and the total flavonoid content of the boxthorn leaves obtained by taking the eutectic solvent as an extraction solvent is 123.94 + / -1.04 mg / g and is far higher than the total flavonoid content of the boxthorn leaves obtained by traditional ethanol extraction by 64.60 + / -0.87 mg / g; the method is good in safety, short in time consumption and high in extraction rate.

The invention provides a preparation method of a stable-size and high-strength laminated timber, which comprises the following steps of: mixing boric acid and choline chloride, and heating and melting at 90 DEG C to form a uniform, stable and transparent liquid, so as to obtain a deep eutectic solvent DES; the preparation method comprises the following steps: under the vacuum degree of-0.1 MPa, dipping wood veneers in DES, performing high-temperature steam sterilization treatment under the condition of 121 DEG C, assembling the veneers subjected to multi-layer treatment according to a rift-grain mode, and performing hot pressing at 160 DEG C to obtain the laminated timber with stable size and high strength. The prepared laminated timber has dimensional stability and good mechanical properties, has structural applicability of direct contact with a moisture environment, and has the advantages of mildew resistance, corrosion resistance, flame retardance and the like.

The invention provides a natural protein-based multifunctional biogel and a preparation method and application thereof, and the preparation method comprises the following steps: dissolving gelatin in water to prepare a gelatin solution, cooling and curing to obtain a gel precursor; soaking the gel precursor in water for swelling, and then placing the gel precursor in a first deep eutectic solvent for solvent exchange to obtain gel; the content of gelatin in the gelatin solution is 5-40 wt%; the swelling time in water is greater than or equal to 5 minutes; the preparation method of the gel also comprises the following steps: pretreating degummed silk to obtain silk nanofibers, and dispersing the silk nanofibers in a dispersion solvent to form a dispersion liquid; mixing and stirring gelatin and the dispersion liquid, cooling and curing, and performing swelling-assisted solvent exchange to obtain the gel. The preparation method is green, and the prepared gel is excellent in mechanical property, has electrical conductivity, long-term environmental stability, adhesion, self-healing property and degradability, and can be widely applied to the field of flexible electronics or biomedicine.

The invention discloses puerarin hydrogel based on a natural eutectic solvent as well as a preparation method and application of the puerarin hydrogel, and belongs to the technical field of pharmaceutical preparations and transdermal drug delivery. The preparation method comprises the following steps: mixing a hydrogen bond acceptor and a hydrogen bond donor, heating and stirring to obtain a natural eutectic solvent; puerarin is mixed with the natural eutectic solvent, and a puerarin solution is obtained; mixing the puerarin solution with a polyvinyl alcohol aqueous solution to obtain a mixed solution; and pouring the mixed solution into a mold or spreading the mixed solution into a film, and then carrying out freeze-thaw cycle to obtain the puerarin hydrogel based on the natural deep-eutectic solvent. According to the invention, a natural eutectic solvent is introduced into a hydrogel system, so that a carrier system with'high solubilization, gel forming and controllable physicochemical properties' is obtained, and meanwhile, the bottleneck of low solubility and low permeability of puerarin is solved. The puerarin hydrogel based on the natural eutectic solvent can be used as a skin external preparation for local administration.

To provide a technique capable of effectively recycling each recovered material as a single material by selectively decomposing, separating and recovering a fiber having a β - glycoside bond from a mixed fiber comprising the fiber having the β - glycoside bond such as cotton and other fibers such as polyester by a simple treatment in a short time under a non-pressurized condition.SOLUTION: A treatment method comprising selectively decomposing a fiber having a β - glycosidic bond from a mixed fiber containing the fiber having a β - glycosidic bond and a fiber composed of another material by a treatment using a deep eutectic solvent (DES) formed by mixing a hydrogen bond donor with a hydrogen bond acceptor at a molar ratio of 0.50 or more and 6.00 or less, and recovering the fiber composed of another material in a fibrous form.SELECTED DRAWING: None

This invention provides a method for extracting valuable metals from spent lithium-ion batteries using a eutectic solvent and a method for regenerating cathode materials. The method utilizes a eutectic solvent of a specific composition as a leaching agent to extract valuable metals from spent lithium-ion batteries and regenerate cathode materials. The steps include: preparation of the eutectic solvent, acquisition of spent cathode materials, leaching of valuable metals using the eutectic solvent, regeneration and recycling of the eutectic solvent, recovery of transition metal elements, recovery of lithium elements, and reprocessing of cathode materials. This invention's method for extracting valuable metals from spent lithium-ion batteries using a eutectic solvent and regenerating cathode materials effectively overcomes the high temperature and long processing time requirements of existing eutectic solvent leaching processes and significantly simplifies or even restructures subsequent metal recovery steps, achieving a short-process, low-energy-consumption, and low-cost closed-loop regeneration of spent lithium-ion battery cathode materials.

The invention relates to the technical field of dendrobium officinale processing, and particularly discloses a method for realizing high value-added conversion of dendrobium officinale alkaloid based on efficient extraction. The method for realizing high value-added conversion of dendrobium officinale alkaloid based on efficient extraction comprises the following steps: S1, pretreatment and activation of raw materials: crushing dried dendrobium officinale stalks to 60-100 meshes to obtain dendrobium powder; mixing the dendrobium nobile powder with an activating agent aqueous solution to obtain activated wet dendrobium nobile powder; s2, deep eutectic solvent synergistic microwave extraction; s3, precipitation and enrichment of an anti-solvent; s4, cleaning and drying the precipitate; s5, preparing alkaloid nanoparticles; and S6, preparing the functional health-care product preparation. As a functional dietary supplement, the dendrobium officinale alkaloid solid beverage tablet or capsule provided by the invention can be used for daily health care, and has the advantages of high bioavailability, strong intestinal synergistic regulation function and good physical stability.

The invention discloses a wood-based evaporation-driven photovoltaic power generation device and a preparation method thereof.The preparation method comprises the steps that natural beech serves as a matrix, and a surface gradient hydrophilic structure is constructed through pretreatment, deep eutectic solvent DES selective delignification treatment, citric acid modification carboxyl introduction and surface silane modifier spraying in sequence; directional transmission of water is realized through an anisotropic micro-channel reserved in wood, and stable water vapor flow induction potential is generated by combining ion selective migration induced by surface fixed charges and an interface evaporation process driven by a top photo-thermal layer, so that electric energy is continuously output. The device has good environmental adaptability, can stably output voltage and power in a high-humidity or high-salt environment, and shows excellent durability and expansibility. The method is environmentally friendly, the process is simple, functional high-value utilization of wood can be achieved, and the method is suitable for flexible electronic or distributed energy supply systems such as low-power-consumption sensors and environment energy collectors.

The present invention discloses a method for extracting and recovering cobalt-containing choline chloride ethylene glycol deep eutectic solvent electrolytic waste liquid, and relates to the field of waste resource recovery. Steps are as follows: 1) water and extractant are added to cobalt-containing electrolytic waste liquid, and oil phase pH is adjusted after stirring. After sufficient reaction, cobalt-containing organic extract and aqueous deep eutectic solvent are separated and obtained; 2) dilute sulfuric acid is added to the cobalt-containing organic extract obtained in step 1), aqueous phase pH is adjusted and back-extracted, and then aqueous phase and organic phase are separated, and aqueous phase is distilled under reduced pressure to obtain cobalt sulfate solid; Organic phase returns to step 1) and is reused as extractant; 3) by step 1) The aqueous deep eutectic solvent obtained is passed through reduced pressure distillation, and the choline chloride ethylene glycol deep eutectic solvent of regeneration is obtained. The recovery method of the present invention has a high recovery rate for cobalt and choline chloride ethylene glycol deep eutectic solvent, and process is simple, environmentally friendly, and has a large application prospect.

The invention belongs to the field of intelligent soft materials, and discloses conductive eutectic gel with high stretchability, ionic conductivity, low temperature resistance and self-repairing performance and a preparation method and application thereof. The eutectic gel is composed of a deep eutectic solvent, a polymer monomer, keratin, PDA (at) Ag, a cross-linking agent, an initiator and pure water. According to strain sensing related tests, the gel has excellent strain sensing performance, and it is proved that the gel has excellent sensitivity and strain sensing performance and has application potential in the fields of high and low temperature severe environment monitoring, human health monitoring and motion detection.

The invention discloses a chlorphenesin coupling crystallization-adsorption purification method based on a deep eutectic solvent, and belongs to the technical field of chemical purification. According to the technical scheme, the method comprises the following steps: S1, mixing crude chlorphenesin with supercritical CO2, and extracting to obtain pretreated chlorphenesin; s2, dissolving the pretreated chlorphenesin in a choline chloride-glycerol DES system, adding an adsorbent after sufficient dissolution, cooling, and separating out chlorphenesin. The technical problems that an organic solvent is used in an existing chlorphenesin purification method, and the solvent is inflammable, toxic, large in dosage, long in purification time and high in energy consumption are solved, and the chlorphenesin coupling crystallization-adsorption purification method based on the eutectic solvent is safe, environmentally friendly, capable of improving production efficiency and high in product purity and yield.

The application provides a kind of eutectic solvent and its preparation method and application, the eutectic solvent includes hydrogen bond donor compound and hydrogen bond acceptor compound, the structural formula of hydrogen bond donor compound is wherein, R1 and R2 independently selected from n-octyl or iso-octyl, the hydrogen bond acceptor compound includes tri-n-octyl phosphine oxide.The eutectic solvent can be efficiently extracted from the permanent magnet rare earth waste hydrochloric acid solution of transition metal, can reduce the use of a large amount of organic solvent in the traditional extraction process.