1105 results about "Deep eutectic solvent" patented technology

A ternary deep eutectic solvent (TDES) system for a biomolecule (for example, chitin) recovery from a biomass (for example, seafood waste), and the method of preparation of ternary deep eutectic solvent (TDES) system, and a process to differentiate / extract / recover biomolecules (such as chitin) from a biomass (such as seafood waste).

According to the preparation method of the Huangshan pine needle polyphenol and the acne-removing and inflammation-diminishing essence, the Huangshan pine needle polyphenol is prepared by adopting a microbial solid fermentation method, release of soluble polyphenol substances in Huangshan pine needles is remarkably promoted, and compared with an unfermented group, the polyphenol content of pine needles reaches up to 146.32 + / -2.53 mg / g and is increased by 1.89 times. The pine needle polyphenol component is prepared by adopting ultrasonic-assisted deep eutectic solvent extraction, membrane filtration and separation and purification technologies, the method has the advantages of short extraction time, low extraction temperature, environmental friendliness and the like, the structural integrity of pine needle polyphenol is maintained to the greatest extent, and the antibacterial activity of polyphenol is remarkably improved. The acne-removing and inflammation-diminishing essence containing the Huangshan pine needle polyphenol is soft in formula and high in safety, has remarkable dual effects of moisturizing and acne removing, can effectively inhibit skin inflammation, promote repair of acne skin, maintain the health state of the skin and meet the requirements of people, and can be widely applied to the field of skin care products.

The invention relates to the technical field of biological extraction, in particular to a green synergistic extraction system and an extraction method and application thereof.The green synergistic extraction system comprises a deep eutectic solvent system, an enzymolysis system and an ultrasonic-assisted extraction system, and the deep eutectic solvent system comprises a DES solvent; the DES solvent is composed of a hydrogen bond acceptor and a hydrogen bond donor, and the hydrogen bond acceptor is choline, choline chloride or L-proline; the hydrogen bond donor is lactic acid, urea or ethylene glycol; enzyme preparations in the enzymolysis system are at least two of cellulase, pectinase and beta-glucosidase; the problems that a traditional organic solvent is high in toxicity and poor in biodegradability and synthetic deep eutectic solvent raw materials are non-renewable are solved, a green synergistic extraction system which is environmentally friendly, low in cost and excellent in performance is developed, the mass transfer efficiency and the extraction yield are improved, the used DES and enzyme preparations can be recycled, and the cost is reduced while the environment is protected.

The invention relates to the technical field of mesoporous carbon material preparation, in particular to a high-temperature mesoporous carbon preparation method which comprises the following steps: S1, mixing a metal halide and an inorganic hydrogen bond donor, and heating and stirring until a solution is clear to obtain an inorganic eutectic solvent; s2, mixing the inorganic eutectic solvent and a biomass raw material for reaction; s3, filtering and washing the material obtained in the step S2; and S4, carbonizing the material obtained in the step S3 in a high-temperature inert atmosphere to obtain the high-temperature mesoporous carbon. According to the method, the wood fiber biomass such as the lowest-value straw, the lowest-value bamboo and the lowest-value wood dust is directly used as raw materials, component separation does not need to be conducted on the wood fiber biomass, and high-value utilization of a large amount of low-value wood fiber biomass can be achieved. The method is relatively simple in process, relatively mild in condition and relatively high in product yield, and an activating agent does not need to be used. The biomass mesoporous carbon prepared by the method also has a high specific surface area in a huge mesoporous volume state, and the specific capacitance in an alkaline electrolyte exceeds 260F / g.

The invention discloses a method for graded recovery of waste cotton-polyester blended fabrics by using a subcritical hydration deep eutectic solvent system, and belongs to the technical field of high-valued recovery and utilization of waste textiles. According to the method, cotton fibers in the waste cotton-polyester blended fabric can be efficiently converted into different sizes of cellulose forms (cotton staple fibers, MCC, CNC and CNF) by precisely regulating and controlling the technological process, meanwhile, it is ensured that polyester fibers are kept in the original state so as to be recycled, and a perfect subcritical hydration DES system cyclic utilization system is constructed; and the recovery cost is reduced, the recovery efficiency is improved, and the additional value of the recovered product is improved, so that the high-valued, green and efficient recycling of the waste cotton-polyester blended fabric is achieved.

The invention discloses deep eutectic gel polymer electrolyte as well as preparation and application thereof, belongs to the technical field of battery electrolyte, solves the problems of low thermal stability, low ionic conductivity and poor mechanical property in the prior art, and comprises a bimetallic salt-eutectic solvent and a polymer chain which are dynamically crosslinked and constructed, the bimetallic salt-eutectic solvent comprises lithium ions, heterogeneous metal salt and Lewis base, and the polymer chain is formed by free radical polymerization, atom transfer radical polymerization (ATRP) or reversible addition-fragmentation chain transfer radical polymerization (RAFT). According to the invention, the deep eutectic solvent is introduced as a reaction solution, so that the organic gel monomer is subjected to photopolymerization or thermal polymerization in the solution, the elongation at break can reach more than 500%, the organic gel has excellent mechanical stretchability, a polymer network is formed by utilizing a long-chain molecular formula of a polymer chain, the deep eutectic solution is wrapped in the polymer network, and the organic gel has excellent thermal stability; and the good ionic conductivity of the electrolyte is ensured.

The invention relates to the technical field of liquid-liquid homogeneous microextraction, in particular to a method for microextraction analysis of perfluorooctanoic acid by using a switchable eutectic solvent. Comprising the following steps: step 1, mixing a hydrogen bond acceptor and a hydrogen bond donor according to a set proportion value, and stirring and mixing at a set temperature value to obtain a eutectic solvent; step 2, filtering the water sample through a water-based filter membrane, then adding a set amount of deep eutectic solvent, dropwise adding an alkaline solution, carrying out full vortex mixing through a mixer, and then adding an acidic solution to form an emulsion; according to the method, the high selectivity of the green solvent with a specific structure on perfluorooctanoic acid and the characteristic that the solvent is switched between hydrophilic and hydrophobic forms are utilized, so that the microextraction time is shortened, and the impurity removal and enrichment effects are enhanced. The method is simple and convenient to operate, green, environment-friendly, low in cost and good in effect, has the advantage of efficiently and rapidly pretreating the batch small-size complex matrix sample, and has a relatively good application prospect.

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 discloses a corn straw nanocellulose reinforced water-resistant fully-degradable mulching film and a preparation method thereof, and belongs to the technical field of agricultural mulching films. The method comprises the following steps: performing two-step DES treatment on corn straws to obtain a nano-cellulose dispersion liquid; a PVA solution with the concentration of 8-12 wt% is prepared; 1-3 wt% of an ultrasonic dispersion silicon source dispersion liquid is prepared; the preparation method comprises the following steps: adding 10 parts of PVA solution, 1.25 parts of silicon source dispersion liquid and 20 parts of glycerol into 100 parts of nanocellulose dispersion liquid to obtain film coating liquid, carrying out curtain coating in a polytetrafluoroethylene mold, and naturally drying to form the film. PVA has good film-forming property but poorer water resistance, and nano cellulose and nano silicon dioxide can be used as green modifiers to be blended with PVA and self-assembled to form a hydrogen bond cross-linking system, so that a'rigid cellulose and silicon dioxide network-flexible PVA matrix 'enhanced structure is formed. Meanwhile, forestry and agricultural residues (corn straw) are adopted as raw materials, nanocellulose is prepared through a two-step deep eutectic solvent (DES), and the problem of high pollution caused by traditional strong acid / strong alkali treatment is solved.

The invention provides loofah sponge nanocellulose hydrogel and a preparation method thereof.The preparation method comprises the following steps that anhydrous citric acid, choline chloride and water are mixed to react, and a ternary eutectic solvent is obtained; dispersing loofah sponge purified cellulose in a ternary eutectic solvent, washing and filtering a product to be neutral, dispersing the product in water, and performing ultrasonic treatment to obtain loofah sponge nanocellulose turbid liquid; dissolving sodium lignin sulfonate and lithium chloride in a sodium hydroxide solution to obtain a precursor solution; mixing the loofah sponge nanocellulose suspension with water, polyacrylamide, ammonium persulfate and N, N-methylene bisacrylamide, pouring the precursor solution into the loofah sponge nanocellulose suspension, uniformly stirring the mixture, pouring the mixture into a mold, and sealing the mold; and forming to obtain the loofah sponge nanocellulose hydrogel. The invention also provides an application of the hydrogel. The hydrogel disclosed by the invention has excellent biocompatibility, mechanical property and conductivity, has a wide application prospect in the field of flexible electronics, and is simple in preparation process, low in cost, green and environment-friendly.

The invention belongs to the field of natural product extraction, and particularly relates to a method for extracting chitosan by using hermetia illucens in a high-valued manner. According to the method, the ionic liquid is introduced while the chitosan is extracted by adopting a deep eutectic solvent method, the deep eutectic solvent can form strong interaction with chitin molecules, the ionic liquid can further enhance specific recognition of the chitin molecules, and the ionic liquid and the deep eutectic solvent have a synergistic effect, so that solubility and recognizability of the chitin are improved; protein and salt are efficiently removed, meanwhile, glucosidic bonds of a chitin macromolecular main chain are prevented from being hydrolyzed and broken, and the extraction rate and purity of chitosan are remarkably improved. According to the method, the extraction condition is mild, the eutectic solvent can be recycled and reused, the extraction process flow of the chitosan is simplified, and the method is environment-friendly.

The invention provides a method for extracting valuable metals in waste lithium ion batteries by using a deep-eutectic solvent and a method for regenerating a positive electrode material, which are used for extracting the valuable metals in the waste lithium ion batteries and regenerating the positive electrode material by using the deep-eutectic solvent with specific composition as a leaching agent. Comprising the following steps: preparation of a eutectic solvent, acquisition of a waste positive electrode material, leaching of valuable metals from the eutectic solvent, regeneration and recycling of the eutectic solvent, recovery of transition metal elements, recovery of a lithium element, re-preparation of the positive electrode material and the like. According to the method for extracting the valuable metal of the waste lithium ion battery through the eutectic solvent and the regeneration method of the positive electrode material, the high-temperature and long-time requirements of an existing eutectic solvent leaching process can be effectively met, and the subsequent metal recovery step is remarkably simplified and even reconstructed; and short-process, low-energy-consumption and low-cost closed-loop regeneration of the positive electrode material of the waste lithium ion battery is realized.

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 hydrophobic aerogel containing carboxyl nanocellulose and xanthan gum as well as a preparation method and application of the hydrophobic aerogel. The preparation method comprises the following steps: mixing cellulose and an acidic deep-eutectic solvent, performing water bath treatment, and stirring in distilled water through a wall breaking machine; mixing the nanocellulose suspension and the xanthan gum solution in equal mass, and uniformly stirring to obtain composite hydrogel; pre-freezing the composite hydrogel in an ultralow-temperature refrigerator, and performing vacuum freeze drying through a freeze dryer to obtain composite aerogel; spraying wax emulsion on the obtained composite aerogel, and drying to obtain the hydrophobic aerogel. The invention provides the hydrophobic aerogel containing the carboxyl nano cellulose and the xanthan gum, which is safe and environment-friendly, has good hydrophobic performance, adsorption performance and mechanical performance, can be directly used for food, and can be used for preparing an oil absorption pad and an oil absorption film.

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 discloses a method for purifying a carbon nano tube by using a deep eutectic solvent. The method comprises the following steps: drying carbon nanotube powder prepared on a supported catalyst by adopting a chemical vapor deposition method; the method comprises the following steps: mixing a hydrogen bond donor and a hydrogen bond acceptor according to a fixed molar ratio, and stirring at a set temperature to obtain a homogeneous eutectic solvent; adding the dried carbon nanotube powder into a deep-eutectic solvent, and dissolving the supported catalyst particles by regulating and controlling the temperature and the time; and carrying out vacuum filtration, cleaning and drying treatment on the reacted liquid to obtain the high-quality carbon nanotube. Compared with a traditional strong acid purification process, the method has the advantages of being simple, environmentally friendly, low in cost and the like, the intrinsic structure and surface characteristics of the carbon nanotubes can be effectively kept, and the method has important industrial application prospects.

The invention relates to the technical field of plant effective component extraction, in particular to a deep-eutectic solvent and application thereof, and the deep-eutectic solvent is composed of anhydrous betaine, DL-malic acid and deionized water. The eutecticevaporate solvent is applied to extraction of momordica grosvenori polysaccharide, ultrasonic waves are combined with the eutecticevaporate solvent, in addition, extraction conditions of crude momordica grosvenori polysaccharide are optimized, and a new method is provided for efficient and green extraction of momordica grosvenori polysaccharide. The new method not only expands the application range of DESs in natural product extraction, but also provides important technical reference for industrial development of momordica grosvenori polysaccharide.

The invention discloses a method for extracting total flavonoids from Chinese redbud seeds, and belongs to the technical field of natural product extraction and separation. The method adopts a deep eutectic solvent (DES) as an extraction medium, and specifically comprises the following steps: mixing dried Chinese redbud seed powder with the DES, carrying out ultrasonic-assisted extraction, and then carrying out centrifugal separation; and purifying the extracting solution by using macroporous adsorption resin, and eluting by using distilled water and ethanol in sequence to finally obtain the total flavonoids. According to the invention, cyclic utilization of the DES solvent is innovatively realized, DES in the loading effluent and the distilled water eluent is recovered through evaporation, and the DES solvent can be repeatedly used for at least three times. Compared with a traditional ethanol reflux extraction method, the method has the remarkable advantages that the total flavone extraction amount is increased by 3 times, and the method is simple and convenient in operation process, high in safety, environment-friendly and low in cost. The method not only improves the extraction efficiency, but also meets the requirements of modern green processing, and provides a new technical approach for sustainable development of natural products.

The invention discloses a lithium metal battery eutectic gel electrolyte and a preparation method and application thereof, and belongs to the field of solid electrolyte. The eutectic gel electrolyte is prepared by carrying out a photocuring reaction on a photocuring precursor solution containing a photoinitiator, and the photocuring precursor solution contains a bi-component liquid compound and a deep eutectic solvent; the two-component liquid compound comprises 4-acryloyl morpholine and a photocurable polyethylene glycol derivative; the deep eutectic solvent is formed from a liquid mixture comprising succinonitrile, lithium bis (trifluoromethylsulfonyl) imide and fluoroethylene carbonate. The eutectic gel electrolyte is composed of a deep eutectic solvent with functional groups such as cyano and sulfonyloxy, and a polymer electrolyte with functional groups such as ether oxygen and a unique skeleton structure. The advantages of high ionic conductivity, wide electrochemical window, high interface stability and the like can be endowed based on the interaction between functional groups and the space confinement effect of a polymer electrolyte skeleton structure.

The invention relates to the technical field of lithium ion batteries, in particular to a preparation method of a porous carbon negative electrode material, which comprises the following steps: mixing starch and a deep eutectic solvent at 60-80 DEG C to obtain a precursor; and calcining the precursor in an inert atmosphere at 300-400 DEG C and 800-900 DEG C in sequence, and grinding to obtain the porous carbon negative electrode material. According to the preparation method of the porous carbon negative electrode material provided by the invention, the eutectic solvent is introduced, so that on one hand, hydrogen bonds among starch molecules and in the molecules are destroyed, the arrangement of the starch molecules is changed from compact and ordered to scattered and disordered, and the starch is homogeneously dispersed, and the starch is prevented from being agglomerated; on the other hand, porosity of the carbon material is realized by utilizing gas generated in the calcination process of the eutectic solvent, so that the specific surface area and the lithium storage performance of the carbon negative electrode material are improved, and the first efficiency is improved.

The invention discloses a raw material deep eutectic solvent purification device for waste polyester textile production, and relates to the technical field of raw material purification. Comprising a main body assembly and a rotating assembly used for washing waste polyester bottle chips, a bearing assembly used for storing the waste polyester bottle chips is arranged in the rotating assembly, and a discharging assembly used for discharging a deep eutectic solvent is arranged on the main body assembly. Due to the fact that the deep eutectic solvent with the small density floats on the upper half portion, and the deep eutectic solvent with the large density sinks to the bottom, the first absorption plate and the second absorption plate which are located on the upper layer and the lower layer of the rotating cylinder respectively absorb the deep eutectic solvent with the small density and the deep eutectic solvent with the large density respectively. Therefore, the effect of screening and absorbing the deep eutectic solvent is achieved, meanwhile, the deep eutectic solvent is prevented from overflowing to the periphery of the main cylinder, and the purity of the deep eutectic solvent is guaranteed.

The invention belongs to the technical field of green processing of biomass materials, and particularly relates to a green preparation process of high-deacetylation-degree chitin. The preparation method aims at the problem of high energy consumption of existing high-deacetylation-degree chitin preparation. According to the method, raw materials are pretreated by utilizing a compound enzyme system under a low-temperature condition, chitin crystal lattices are preliminarily dissociated by combining a deep eutectic solvent at a medium temperature, high deacetylation conversion is realized through short-time dissolution of an ionic liquid, and meanwhile, a membrane separation-electrodialysis-gradient freezing crystallization three-stage recycling technology is matched, so that recycling of the solvent is realized; the method greatly reduces the reaction temperature and energy consumption, avoids the use of corrosive reagents, and has the advantages of environmental protection, low energy consumption, high deacetylation degree of the product, excellent quality and the like.

The invention belongs to the technical field of fine chemical preparation, and discloses a method for directly preparing dimethyl carbonate by catalyzing carbon dioxide and methanol through nano cerium oxide, which comprises the following steps: step S10, weighing nano cerium oxide, methanol and a deep eutectic solvent; s20, putting the weighed nano cerium oxide, methanol and the deep eutectic solvent into a beaker, and stirring and mixing; s30, adding the mixed solution into a reaction kettle, introducing carbon dioxide to replace air in the reaction kettle, and then heating the reaction kettle; s40, after the reaction kettle is cooled to the normal temperature, releasing the pressure and taking out the dimethyl carbonate; according to the scheme, by adding the deep eutectic solvent, water and a product in the reaction are separated, the reaction is promoted, homogeneous reaction and heterogeneous separation are realized, the highest conversion rate of methanol can reach 49.70%, and the selectivity of dimethyl carbonate exceeds 99%; the invention solves the problem of low conversion rate of the existing dimethyl carbonate preparation method.

The present invention relates to the technical field of lithium-ion battery recycling and utilization, and specifically discloses a method for recycling and regenerating positive electrode materials from waste ternary lithium-ion batteries. The present invention uses a ternary deep eutectic solvent combined with microwave-assisted leaching to efficiently leach waste lithium-ion battery positive electrode materials, and then combines subsequent precipitation and adjustment of the molar ratio of metal elements to regenerate the positive electrode materials. The obtained recycled and regenerated positive electrode materials have good electrochemical properties. The technical solution provided by the present invention effectively solves the problems of high cost and complicated process flow of the existing method for recycling metals from waste ternary lithium-ion batteries, and the problem that when the recovered metals are used to prepare lithium battery positive electrode materials, the purity is insufficient, resulting in poor effect of the regenerated positive electrode materials. It provides a new idea for the treatment of waste ternary lithium-ion batteries.

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 recovery and regeneration of waste lithium ion battery materials, in particular to a method for synchronously realizing selective extraction of lithium and direct regeneration of iron phosphate. The method comprises the following steps: providing positive electrode powder of the waste lithium iron phosphate battery; a hydrogen bond donor and a hydrogen bond acceptor are mixed, heated and stirred to obtain the eutectic solvent, the hydrogen bond donor is one or more of formic acid, acetic acid, propionic acid, pyruvic acid, phytic acid and citric acid, and the hydrogen bond acceptor is ethylene glycol; adding water into the deep-eutectic solvent for dilution, then adding the positive electrode powder and an oxidizing agent, heating and stirring, and filtering to obtain a lithium-containing leaching solution and leaching residues; carrying out concentration treatment and impurity removal treatment on the lithium-containing leachate, and then adding a saturated sodium carbonate solution to carry out lithium precipitation reaction to obtain lithium carbonate; and calcining the leaching residues to obtain iron phosphate. According to the method, the specific eutectic solvent is adopted to treat the positive electrode powder of the waste lithium iron phosphate battery, and selective extraction of lithium and direct regeneration of iron phosphate can be synchronously realized under mild conditions.

The invention discloses a morchella esculenta extract as well as an extraction method and application thereof, and belongs to the technical field of plant medicine product separation. The invention relates to a specific extraction method of phenolic acid of morchella, through the synergistic effect of low-temperature plasma pretreatment, targeted enzymolysis and deep eutectic solvent extraction, the extraction rate of phenolic acid is remarkably improved, particularly, specific extraction of chlorogenic acid can be realized, and the purity of chlorogenic acid is greater than 85%. The process is environment-friendly and efficient, and the obtained product has important application value in the fields of inflammation resistance and oxidation resistance.

The invention belongs to the technical field of separation and recovery, and particularly relates to separation and recovery equipment and process for an R410A mixed refrigerant based on a deep eutectic solvent. The separation and recovery equipment for the R410A mixed refrigerant based on the eutectic solvent comprises an absorption tower, a first flash tank and a second flash tank, the liquid outlet end and the liquid inlet end of the absorption tower are communicated and connected through a circulating pipe; the first flash tank and the second flash tank are arranged on the circulating pipe; a first heat exchanger is arranged on the circulating pipe and between the first flash tank and the second flash tank, and a second heat exchanger is arranged on the circulating pipe and between the second flash tank and the liquid inlet end of the absorption tower; the gas outlet end of the first flash tank is communicated with the gas inlet end of the absorption tower through a communicating pipe; a third heat exchanger is arranged on the communicating pipe. By adopting the equipment and the process provided by the invention, the recovery rates of R32 and R125 in the R410A mixed refrigerant both reach 95% or above.

The invention discloses an efficient preparation method of nanocellulose, and belongs to the field of biological material preparation. The preparation method comprises the following steps: (1) pretreating straws to obtain small straw blocks; (2) putting the small straw blocks into a deep eutectic solvent composed of polybasic acid and polyhydric alcohol, uniformly stirring and mixing, and heating to obtain a mixed solution; (3) adding an initiation treatment reagent into the mixed solution to perform purification treatment, and then performing solid-liquid separation and decoloration to obtain nano cellulose; and (4) recovering the deep eutectic solvent, and initiating the treatment reagent to be reused. Compared with the prior art, the method has the advantages that the high conversion efficiency of 72.3%-98.1% is achieved, the solvent recovery rate is high, the cost effectiveness of the method is proved through further economic analysis, and the method is suitable for sustainable large-scale nano cellulose production. In general, the green, efficient, economical and feasible deep eutectic solvent route provides a promising solution for high-value utilization of biomass resources.

The invention discloses a method for extracting active ingredients of traditional Chinese medicinal materials based on ultralow-temperature crushing and deep eutectic solvent synergy, a tableted candy for dispelling effects of alcohol and protecting liver and a preparation method of the tableted candy. The ultralow-temperature crushing and deep eutectic solvent synergy extraction technology is combined, and the active ingredients of the traditional Chinese medicinal materials with homology of medicine and food are extracted at low temperature; the method comprises the following steps: firstly, quickly freezing a raw material by using liquid nitrogen and mechanically crushing the raw material to improve the cell wall breaking rate, then stirring and mixing a deep eutectic solvent based on choline chloride and glycerol with water to reduce the viscosity of the solvent for extraction, and carrying out ultrasonic extraction, filtration, macroporous adsorption resin recovery and other steps to obtain a high-purity extract. According to the preparation method, the extraction rate of active substances in the traditional Chinese medicinal materials is increased, and extracts of multiple medicinal and edible Chinese herbal medicines such as lucid ganoderma, radix puerariae, hawthorn and olive are compounded into the tablet candy, so that liver injury caused by alcohol is effectively improved, and side effects caused by long-term administration of medicines can be effectively avoided.