1010 results about "Solvent extraction" patented technology

The invention discloses a method for extracting and purifying flavone in litsea coreana through an ultrasonic-assisted eutectic solvent, and belongs to the technical field of green processing of natural products. The invention provides a method for efficiently preparing litsea coreana flavone by integrating computer prediction, green solvent extraction and resin purification technologies. The method comprises the following steps: firstly, calculating and screening a deep eutectic solvent system with the highest affinity with the litsea coreana flavone on the basis of a COSMO-RS theoretical model, then coupling the optimized DES with an ultrasonic-assisted extraction (UAE) technology, and through the synergistic effect of the DES and the UAE technology, remarkably improving the extraction rate of the litsea coreana flavone and furthest keeping the biological activity of a target component; then, a macroporous resin dynamic adsorption-desorption purification process is linked, so that high-selectivity enrichment and impurity removal of the flavonoid compounds in the crude extract are realized, a high-purity product is obtained, and a complete process route from intelligent screening, efficient extraction to precise purification is finally formed.

The invention discloses a composition with high ultraviolet damage resistance as well as a preparation method and application thereof, and particularly belongs to the technical field of skin care product raw materials. The composition with high ultraviolet damage resistance is prepared by performing solid-state fermentation on radix scutellariae roots, radix ligustici sinensis and radix puerariae through compound bacteria consisting of bacillus subtilis, lactobacillus bulgaricus and bacillus coagulans and then performing solvent extraction. The composition with high ultraviolet damage resistance has excellent effects of resisting oxidative damage and inhibiting inflammatory factors, and can achieve the effects of repairing skin barriers, resisting inflammation, relieving, efficiently promoting repair of after-sun skin and the like.

The invention discloses a superconducting carbon black co-production method based on directional refining of catalytic slurry oil and a product thereof, and belongs to the technical field of carbon black preparation, and the method comprises the following steps: mixing the catalytic slurry oil and catalytic circulating oil to obtain mixed slurry oil, and adding a deliming agent for settling separation to obtain purified slurry oil; carrying out continuous solvent extraction on the obtained purified oil slurry to respectively obtain an aromatic component and a heavy component; carrying out thermal polycondensation reaction on the obtained aromatic component in a magnetic field environment in the presence of a catalyst and a cross-linking agent, and then carrying out supercritical fluid extraction to obtain spinnable mesophase pitch; carrying out slurry reactor hydrogenation deconstruction on the obtained heavy component to obtain stable micromolecular carbon black raw oil, mixing the carbon black raw oil with a nitrogen source and a template precursor, carbonizing, and carrying out acid pickling to obtain the superconducting carbon black; through a heavy oil slurry reactor hydrogenation deconstruction'doping-template 'synergistic carbonization strategy, the superconductive carbon black with nitrogen / phosphorus co-doped and developed hierarchical porous structure is constructed in situ by a one-step method.

The invention discloses a process for producing oligosaccharide from lignocellulose and performing acid circulation, which comprises the following steps of: (1) performing swelling reaction on the lignocellulose by using more than 70wt% of inorganic acid solution to obtain high-acid biomass candy pomace; (2) extracting the high-acid biomass candy pomace with an organic solvent to obtain low-acid biomass candy pomace and an acid-containing organic phase; (3) removing insoluble substances of the low-acid biomass candy pomace to obtain an oligosaccharide solution; and (4) adding water into the acid-containing liquid obtained in the step (2) for reverse extraction, standing and layering to obtain an acid solution and an organic phase. According to the method, the acid in the high-acid and solid biomass candy pomace is effectively recycled, the process is efficient and mild, energy does not need to be additionally provided, and all used reagents can be recycled and reused.

The invention discloses a preparation method of a crocodile hydrolyzed protein zinc skin care product, and relates to the technical field of skin care. The method comprises the following steps: step a, pretreating raw materials: taking fresh crocodile meat and bones, cleaning, mechanically crushing until the particle size is less than 5mm, and adding water according to the ratio of 1: (3-5) to prepare homogenate; step b, performing three-step enzymolysis, namely performing enzymolysis by adopting alkaline protease, flavourzyme and zinc chelating enzyme in sequence; according to the constructed technology of three-step enzymolysis and three-stage membrane separation, accurate preparation of crocodile protein zinc is achieved, and the zinc chelating rate is increased to 90% or above through the gradient effect of alkaline protease, flavourzyme and zinc chelating enzyme and directional release of zinc binding sites and is remarkably higher than that of a traditional single-enzyme hydrolysis technology; meanwhile, a combined purification technology of a ceramic membrane, an ultrafiltration membrane and a nanofiltration membrane is adopted to replace chemical precipitation and organic solvent extraction, so that the completeness of active ingredients is reserved, the risk of environmental pollution is reduced, and the method conforms to the green manufacturing trend of food industry.

This disclosure relates to an annular centrifugal extractor with Solid Separation Part to Separate Solid Particles Present in Solvent Extraction Fluid. In order to remove solid particles from the solution, a solid separation part / rotating bowl is attached to rotating bowl in such a way that solid particles settle inside the solid separation part. This solid separating centrifugal extractor contains two parts: (I) upper part which acts as a liquid-liquid separator to separate aqueous and organic solution used in solvent extraction operation and (II) bottom part which acts as a solid separator to separate solid particle present in solvent extraction liquids. The bottom rotating rotor is coupled with upper rotating rotor by threading arrangement. Both the rotating rotors are confined within a stationary cylinder. Dispersion with solid particles entering inside the rotating bowl is deflected towards the wall of the rotating cylinder by deflecting baffle by centrifugal sedimentation.

The invention discloses a method for improving in-vivo and in-vitro antioxidant activity of pomegranate peel polyphenol extract through combined enzymolysis of tannase and beta-glucosidase, and relates to the technical field of food science and biology. The pomegranate peel polyphenol extract provided by the invention is obtained from pomegranate peel powder through solvent extraction. According to the present invention, tannase and beta-glucosidase are adopted to perform single or combined enzymolysis on the pomegranate peel polyphenol extract, and the determination on the in vitro antioxidant activity of the pomegranate peel polyphenol extract shows that the antioxidant activities of DPPH and ABTS after the combined enzymolysis are improved by 29.84% and 29.30% compared with the antioxidant activities of the untreated polyphenol extract; the UPLC-ESI-QTOF-MS is used for identifying and analyzing the components of the enzymatic hydrolysate, the content of macromolecular ellagic tannin is obviously reduced, and the content of micromolecular ellagic acid and gallic acid is increased. The enzymolysis polyphenol is applied to D-galactose induced oxidative stress mice, and the result shows that the oxidative damage relieving effect of the enzymolysis polyphenol on the mice is better than that of untreated polyphenol.

The invention relates to a green preparation method and application of an anti-saccharification tea extract, and belongs to the technical field of biology. The preparation method of the tea extract comprises the following steps: extracting tea by using a deep eutectic solvent to obtain the tea extract, and carrying out deproteinization and decoloration to obtain the tea extract. The hydrogen bond acceptor of the deep eutectic solvent comprises proline or betaine, and the hydrogen bond donor of the deep eutectic solvent comprises xylitol or glycerol. By utilizing the NaDES extraction technology, effective components can flow out by efficiently breaking cell walls, so that the extraction efficiency of tea active components represented by tea polyphenol is effectively improved; the selected NaDES solvent is natural, green and easy to obtain; the tea extract disclosed by the invention has an anti-saccharification effect, blocks glycosylation reaction, reduces and inhibits generation of AGEs, improves the problems of dark skin, skin laxity and aging caused by saccharification, reduces collagen loss, keeps skin elasticity and delays skin aging.

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 discloses a method for recovering Mo and Fe from direct coal liquefaction oil residues, and belongs to the technical field of hydrometallurgy. The method comprises the steps of solvent extraction, roasting enrichment, wet leaching, extracting agent extraction, ammonia water reverse extraction and evaporative crystallization, and ammonium molybdate and Fe (OH) 3 are obtained. Wherein in the wet leaching process, a leaching aid and sulfuric acid are jointly used for leaching, so that Ca and Si in the oil residues are left in leaching residues, and Mo, Fe, Al and the like enter a solution. The method comprises the following steps: simultaneously extracting Mo and Fe from a solution by using an extracting agent, precipitating Fe in a Fe (OH) 3 state by using an ammonia water reverse extraction method, leaving Mo in a reverse extraction solution in the form of ammonium molybdate, and further evaporating and crystallizing the reverse extraction solution to obtain the ammonium molybdate. According to the method, two valuable metals Mo and Fe in the direct coal liquefaction oil residue can be effectively recovered, and resource recycling is facilitated.

The invention relates to an extraction method for strengthening low-concentration rare earth elements and equipment for implementing the extraction method. The extraction method is a continuous extraction process based on the combination of a microfluid technology and a solvent extraction technology, and efficient enrichment and recovery of low-concentration rare earth elements are realized through combined use of a gas-liquid-liquid three-phase system and an extraction agent. The extraction method provided by the invention has the advantages of high mass transfer efficiency, simple operation, recyclable extraction agent, high extraction efficiency, good stability and the like, and is suitable for enrichment and recovery of low-concentration rare earth elements on an industrial scale under the condition of a large phase ratio (greater than 50).

The invention discloses an imidazole derivative-organic phosphoric acid combined extracting agent and an application method thereof, and belongs to the technical field of hydrometallurgy. The molar ratio of the imidazole derivative to the organic phosphoric acid is (10: 1)-(1: 10). The combined extraction agent can be used for extracting nickel, cobalt and manganese from a solution containing one or more nickel, cobalt and manganese. The selectivity of the solvent extraction system to nickel, cobalt and manganese is far higher than that of impurity metal ions such as calcium, magnesium, lithium, sodium and potassium, the extraction system is good in stability, free of emulsification phenomenon and third phase generation, easy to operate, low in cost and environmentally friendly. In lithium battery recovery and other systems containing coexistence of nickel, cobalt, manganese and calcium, magnesium and lithium, the solvent extraction system is particularly good in selectivity, and efficient co-extraction of nickel, cobalt and manganese can be achieved. When a mixed solution and a weak acid solution are treated, purification and concentration of target metal can be synchronously achieved, the recovery period is greatly shortened, the recovery rate is increased, and the method has great significance in efficient utilization of nickel-cobalt-manganese resources.

A production method of high-structure carbon black based on petroleum-based composite raw oil comprises the following steps: S1, performing fraction cutting on the petroleum-based composite raw oil to obtain crude carbon black raw oil; s2, carrying out solvent extraction on the crude carbon black raw oil to obtain aromatic-rich carbon black raw oil; and S3, vaporizing and cracking the aromatic-rich carbon black raw oil to generate the high-structure carbon black. The method for producing the high-structure carbon black based on the petroleum-based composite raw material oil is different from the domestic existing production process of coal tar and anthracene oil, and the structure degree of the carbon black product can be improved by pretreating the petroleum residual oil and the tail oil, so that the production of the high-structure carbon black product is realized, the domestic raw material source of the high-structure carbon black is broadened, and the production cost of the high-structure carbon black is reduced. And the competitiveness of the product is improved.

The invention discloses a ganoderma lucidum liver-protecting pill and a preparation method thereof, and the ganoderma lucidum liver-protecting pill comprises the following components: 8-20% of ganoderma lucidum polysaccharide extract, 5-15% of coptis chinensis extract, 4-10% of pulvis fellis saponin extract, 3-8% of oriental wormwood, 2-8% of taurine, 1-3% of vitamin E and 2-6% of scleroprotein (ganoderma lucidum sclerotium extract). The auxiliary materials comprise microcrystalline cellulose, corn starch, licorice extract, polyvinyl alcohol and the like, and the balance is 100%. Therefore, the problem of ingredient inactivation caused by traditional high-temperature / solvent extraction is solved through process innovation (such as supercritical CO2 pressure 300bar / enzymolysis pH 5.0 parameter optimization), the dissolution rate is increased to be more than or equal to 90% in 30 minutes (traditional pills need 45 minutes and only 75%), the limitation of single ingredient liver protection is broken through through the synergistic effect of the composite ingredients, and the liver protection effect is improved. Animal experiments prove that a liver injury marker ALT / AST can be reduced by more than 50%, the hepatic fibrosis area can be reduced by 40%, the degradation rate of the active ingredients within 6 months in a stability test is less than or equal to 5%, and the comprehensive bioavailability is improved by 30% compared with that of a traditional product.

The invention discloses a method for separating vanadium and iron in a high-iron-vanadium electrolyte. The method comprises the steps of pH regulation and control, iron removal, vanadium extraction and vanadium reverse extraction. In the step of iron removal, an iron ion targeted complexing agent and a solid phase adsorbent are added into the high-iron vanadium electrolyte with the pH adjusted, reaction is conducted for 10-15 min under stirring, then direct filtering is conducted, and low-iron vanadium electrolyte and a solid phase are obtained; in the vanadium extraction step, vanadium in the low-iron vanadium electrolyte is extracted by adopting a mixed solvent of pretreated P204, TBP and sulfonated kerosene, and a vanadium-containing organic solution is obtained; and the vanadium reverse extraction comprises the step of carrying out reverse extraction on the vanadium-containing organic solution through a sulfuric acid solution with the concentration of 2.0-5.0 mol / L to obtain a vanadium electrolyte. The method can be used for treating iron ions in all valence states, particularly ferric ions which are easier to extract than vanadium ions, qualified vanadium electrolyte with the iron ion concentration meeting the industrial standard can be directly obtained after reverse extraction, and a complexing agent and an adsorbent can be recycled.

Devices, systems, and techniques can be provided for processing an oil-containing material with an alcohol-based solvent to extract oil from the material. In some examples, a system includes a pretreatment dehydration vessel that removes water from the oil-containing material prior to processing the oil-containing material in an extractor to extract oil from the material. An alcohol-based solvent may also be supplied to the dehydration vessel to remove water from the oil-containing material, thereby generating a dehydrated material that can be extracted in a downstream extractor.

The invention discloses an oxygen control process for injection-molded titanium alloy based on oxygen-free solvent degreasing, which belongs to the technical field of powder metallurgy materials and comprises the following steps of: banburying and cooling pre-alloyed titanium powder and a binder matrix, granulating and injection-molding, and degreasing, drying and sintering by using an oxygen-free solvent. According to the method, a full-process oxygen control process chain of vacuum pre-drying of pre-alloyed titanium powder, preparation of an oxygen-free binder, extraction and degreasing of an oxygen-free solvent, vacuum thermal degreasing and graphite furnace temperature control sintering is constructed, invasion of impurity elements such as carbon, oxygen and nitrogen is blocked from the source to a finished product, and the core bottleneck that the oxygen content of the powder metallurgy titanium alloy is difficult to control is solved; and the consistency of the strength and plasticity of the product is guaranteed through stable impurity control, and performance fluctuation caused by out-of-control of the oxygen content is avoided.

The invention provides a method for recovering lithium from salt lake brine with a high magnesium-lithium ratio. Lithium is extracted through the working procedures of pretreatment, adsorption, desorption, solvent extraction and precipitation, a specific extraction agent is adopted for saponification, a saponified organic phase is prepared, then the saponified organic phase and a lithium-containing desorption solution are extracted, and a raffinate and a loaded organic phase are obtained respectively; carrying out reverse extraction on the loaded organic phase to respectively obtain a lithium-containing concentrated solution and a blank organic phase; and then, mixing the lithium-containing concentrated solution with a precipitant, and carrying out solid-liquid separation to obtain lithium carbonate. According to the method disclosed by the invention, a co-extractant ferric trichloride does not need to be added, so that the problems caused by the co-extractant in the prior art are avoided, and the extraction separation of lithium in a near-neutral pH range is realized; moreover, the pH value of the raffinate is in a near-neutral range (about 7-8), so that the subsequent wastewater treatment difficulty is reduced; in the reverse extraction section, lithium in a loaded organic phase is enriched into a water phase in a phase ratio regulation and control mode, and a lithium carbonate product can be prepared through direct precipitation.

The invention relates to a method for preparing a hard carbon material from a low-rank coal hot melt, the hard carbon material obtained by using the method, application of the hard carbon material and a sodium ion battery containing the hard carbon material. The method comprises the steps of raw material pretreatment, degradation solvent extraction, precipitation separation, spray granulation, crosslinking, primary carbonization, secondary carbonization, cooling and the like. According to the method, microcrystalline defects of the coal-based hard carbon material are regulated and controlled through self-foaming of the low-rank coal hot melt, effective regulation and control of the hard carbon microcrystalline structure are achieved, the ultrafine grinding process is omitted, meanwhile, in-situ oxygen element doping is achieved, and the surface activity of the material and the first efficiency of the negative electrode material are effectively improved. Through the method, the low-rank coal can be converted into the sodium battery hard carbon negative electrode material in a high-valued manner, the application scene of the low-rank coal is expanded, and the comprehensive utilization level of coal resources is improved.

A device for recovering entrained organic particles from an aqueous solution is provided. The device comprises a tank configured to receive a mixed solution through an inlet, wherein the mixed solution comprises an aqueous solution and organic particles, a plurality of curved impellers configured to impel a torque on the mixed solution, wherein in response to receiving the torque the mixed solution moves in a rotational motion within the tank, a deflector wall coupled to the floor extending vertically from the floor and surrounding the plurality of curved impellers to form an inner well configured to direct a flow of the rotating mixed solution towards a top surface of the tank, and a skim launder coupled to a boundary wall of the tank and positioned at the top surface, wherein the skim launder is configured to recover organic particles from the tank as they separate from the aqueous solution.

The invention provides a method for extracting ginseng tissue culture adventitious root saponin by a eutectic solvent synergistic biological enzymolysis technology, which comprises the following steps: (1) adding ginseng tissue culture adventitious root dry powder into water, adding compound enzyme, heating, adjusting the pH value of the solution, and carrying out biological enzymolysis; after the enzymolysis is finished, performing enzyme deactivation and centrifugation to obtain supernate A and precipitate; (2) adding an eutectic solvent into the precipitate, and performing ultrasonic extraction and centrifugation to obtain supernate B; and (3) combining the supernate A and the supernate B, and freeze-drying to obtain the ginseng tissue culture adventitious root saponin. According to the method, the biological enzymolysis technology and the eutectic solvent extraction technology are combined, the content of total saponins in the ginseng tissue culture adventitious root extract is increased, and meanwhile the content of Rg3, Rg5 and Rh2 rare ginsenosides in the ginseng tissue culture adventitious root extract is also increased. The invention belongs to the technical field of plant component extraction.

A production method of a rubber plasticizer is characterized in that a solvent extraction method is used, a first solvent comprises one of phenol, furfural, N-methyl pyrrolidone and dimethyl sulfoxide and enters the upper portions of a first extraction tower and a second extraction tower, a second solvent is alkane and / or cycloalkane with the carbon number of 6-20 and enters the lower portions of the three extraction towers, raw material oil is extract oil, and the second solvent is one of phenol, furfural, N-methyl pyrrolidone and dimethyl sulfoxide. Raw oil enters from a middle feed port of the first extraction tower; raffinate flowing out of the top of the first extraction tower enters a middle feed port of the second extraction tower after part of the solvent is recovered; evaporating secondary raffinate flowing out from the top of the second extraction tower to recover the solvent, thereby obtaining the rubber plasticizer; heating a material flowing out from the top of the third extraction tower, recovering part of solvent, pumping into a raw oil inlet of the primary extraction tower by using a pump, mixing with raw oil, and entering the primary extraction tower; and evaporating the effluent extract at the bottoms of the first extraction tower and the third extraction tower to recover the solvent to obtain secondary extract oil.

The invention discloses a preparation process of polyether-ether-ketone, and relates to the technical field of preparation of inorganic compounds. The preparation process comprises the following steps: reacting 4, 4 '-difluorobenzophenone, sodium carbonate and hydroquinone to generate polyether-ether-ketone, taking a polyaryletherketone block oligomer as an end-capping reagent, reacting 4, 4'-difluorobenzophenone with 4, 4 '-dimercaptodiphenyl sulfone, and then reacting with pentaerythritol phosphate to obtain the polyaryletherketone block oligomer. The thioester bond reversibly breaks at the polymerization temperature, exposed active sulfenyl reacts with hydroxyl at the tail end of the polyether-ether-ketone to form a more stable covalent bond, volatilization of the end-capping reagent is avoided, meanwhile, the initial decomposition temperature of the end-capped polyether-ether-ketone is increased, and the stability of the end-capping reagent is improved. The polyether-ether-ketone generated in the polyether-ether-ketone resin product is subjected to treatment procedures of crushing, organic solvent extraction, water washing, filtering, drying and the like, so that the product polyether-ether-ketone is obtained, less three wastes are generated, the solvent can be recycled, the atom economy is relatively high, and the preparation process of comprehensive utilization of resources is realized.

The invention discloses a soothing and repairing gentiana macrophylla extract composition as well as a preparation method and application thereof, and particularly belongs to the technical field of preparation of raw materials of daily necessities. The gentiana macrophylla extract composition is obtained by performing compound solid-state fermentation on gentiana macrophylla through aspergillus oryzae, leuconostoc citreum and saccharomyces cerevisiae and then performing solvent extraction. The gentiana macrophylla extract composition provided by the invention has relatively high oleanolic acid content, which proves that the aspergillus oryzae, the leuconostoc citreum and the saccharomyces cerevisiae can effectively enrich active ingredients in gentiana macrophylla, and meanwhile, the aspergillus oryzae, the leuconostoc citreum and the saccharomyces cerevisiae have a certain synergistic effect on the enrichment of the active ingredients in the fermentation process; the gentiana macrophylla extract composition provided by the invention can effectively inhibit release of inflammatory factors and promote skin repair.

The invention provides a method for extracting gallium and iron from neodymium iron boron waste, which is a method for efficiently extracting gallium and recovering iron from hydrochloric acid leachate of the neodymium iron boron waste based on a solvent extraction method. The method is short in technological process and good in separation effect, compared with the prior art, the dosage of reagents such as alkali liquor is obviously reduced, generation of waste residues is reduced, additional reagents such as an iron masking agent and a reducing agent do not need to be used, the follow-up recovery process is prevented from being complicated, and the recovery rate and purity of gallium and iron are greatly improved. The method can be directly and effectively combined with an existing process for recycling rare earth elements from waste neodymium iron boron, is stable in process and low in cost, and is a gallium extraction process with a very promising prospect.

The invention belongs to the technical field of nano material synthesis, and particularly relates to a method for regulating and controlling the particle size and the pore diameter of mesoporous silica particles with dendritic pore structures. The preparation method comprises the following steps: preparing dendritic mesoporous silica by adopting a two-phase layering method, adding a surfactant and a basic catalyst as a water phase, adding cyclohexane and TEOS as an oil phase, carrying out a self-assembly reaction on a two-phase interface, removing the surface activity in a pore channel by adopting a solvent extraction method, and regulating and controlling the volume ratio of the system oil to the water phase and the volume ratio of the TEOS in the oil, so as to obtain the high-purity mesoporous silica. Dendritic mesoporous silica with specific particle sizes and different pore sizes or with specific pore sizes and different particle sizes is prepared, the particle size of the prepared mesoporous silica is 50-300 nm, and the pore size is 2-15 nm. The method is simple to operate, the prepared mesoporous silica is uniform in particle size, good in dispersity and high in stability, and a new thought is provided for preparation of spherical dendritic mesoporous silica with adjustable particle size and pore size.

A device for recovering entrained organic particles from an aqueous solution is provided. The device comprises a tank configured to receive a mixed solution through an inlet, wherein the mixed solution comprises an aqueous solution and organic particles, a plurality of curved impellers configured to impel a torque on the mixed solution, wherein in response to receiving the torque the mixed solution moves in a rotational motion within the tank, a deflector wall coupled to the floor extending vertically from the floor and surrounding the plurality of curved impellers to form an inner well configured to direct a flow of the rotating mixed solution towards a top surface of the tank, and a skim launder coupled to a boundary wall of the tank and positioned at the top surface, wherein the skim launder is configured to recover organic particles from the tank as they separate from the aqueous solution.

The application discloses an EBR solvent and a rectification preparation process thereof, and belongs to the technical field of semiconductor material processing; wherein the EBR solvent comprises the following components in percentage: 95-98% of propylene glycol methyl ether acetate and 2-5% of propylene glyyl methyl ether. The EBR solvent is prepared by rectification recovery of waste liquid generated in a dilution cleaning process, and the main steps are as follows: S1, sedimentation filtration: filtering solid impurities in the waste liquid; S2, preliminary water removal: removing part of water in the filtered waste liquid through a common distillation tank to obtain primary waste liquid raw material; S3, feeding: introducing the primary waste liquid raw material into a rectification tower for intermittent distillation purification; S4, water removal: removing water in the primary waste liquid raw material by using an extractant; S5, extractant reflux; S6, extractant extraction: after the water is removed, the extractant is extracted; and S7, EBR solvent extraction. The application solves the problem that the purity of the effective component EBR solvent in the photoresist cleaning waste liquid is not high, and the recycling effect is poor.

The invention relates to the field of food pesticide residue detection, and particularly discloses a food pesticide residue data acquisition device, which comprises a shell, a sample pretreatment assembly, a detection module, a data processing module, a communication module and a power supply module, wherein the sample pretreatment assembly comprises a sample inlet bin formed in the shell, a sealing cover plate is slidably mounted on the surface of the shell and located at the top of the sample inlet bin, and a micro motor is fixedly mounted in an inner cavity of the shell and located at the bottom of the sample inlet bin; the data acquisition device for food pesticide residues has the beneficial effects that the miniature crushing blade and the solvent release pipe are integrated in the sample inlet bin, and the micro-fluidic main chip is arranged under the sample inlet bin, so that sample crushing, solvent extraction, mixing, reaction and split-flow detection are automatically completed in a closed system, manual intervention is not needed, and the detection efficiency is improved. The detection efficiency and repeatability are remarkably improved, and cross contamination and operation errors are effectively avoided.

The invention discloses a high-compaction sodium ion battery negative electrode composite hard carbon material and a preparation method thereof. The preparation method comprises the following steps: S1, asphalt pretreatment: dividing asphalt into a toluene soluble component and a toluene insoluble-pyridine soluble component through a solvent extraction method; s2, precursor mixing: uniformly mixing a toluene soluble component and a biomass raw material to obtain a mixed precursor; s3, pre-carbonization: pre-carbonizing the mixed precursor in a protective atmosphere to obtain a pre-carbonized precursor; s4, crushing and refining: crushing and refining the pre-carbonized precursor to obtain pre-carbonized precursor fine powder; s5, mixing and coating: mixing the pre-carbonized precursor fine powder with a toluene insoluble-pyridine soluble component to obtain a pre-carbonized precursor coated with the toluene insoluble-pyridine soluble component; and S6, high-temperature sintering: carrying out high-temperature carbonization on the pre-carbonized precursor coated with the toluene insoluble-pyridine soluble component in a protective atmosphere to obtain the composite hard carbon material. The preparation method has the characteristics of high compaction density, high first-cycle coulombic efficiency and excellent rate capability.