127results about How to "Process environmental protection" patented technology

The invention relates to an electrode material for lithium extraction, a preparation method of the electrode material, a lithium extraction electrode and a lithium extraction system, belongs to the field of salt lake lithium extraction, and solves at least one of the problems of fast capacity fading, relatively low overall lithium extraction efficiency and short service life of a lithium extraction electrode for an alkaline solution in the prior art. A preparation method of an electrode material for lithium extraction comprises the following steps: mixing an electrode active material with a rare earth salt solution, and forming a phosphate rare earth layer on the surface of the electrode active material in an in-situ coating manner; the electrode active material comprises lithium iron phosphate and a doped derivative thereof. When the preparation method, the obtained electrode material, the lithium extraction electrode and the lithium extraction system are applied to lithium extraction of salt lake brine, especially alkaline brine, at least one of the cycle performance, the lithium extraction efficiency and the service life is remarkably improved.

The invention belongs to the technical field of a new energy material lithium ion battery positive electrode material, and particularly relates to a tungsten-niobium co-doped nickel-rich ternary positive electrode material and a preparation method thereof. According to the preparation method, a precursor subjected to tungsten-niobium mixed pretreatment is calcined to obtain the double-element co-doped nickel-rich ternary positive electrode material. Compared with an undoped sample and a single-element doped sample, the prepared co-doped sample can effectively enhance the structural stability of the material, reduce the polarization of an electrode and improve the diffusion kinetics of lithium ions, so that the cycling stability and the rate capability of the battery are improved at the same time.

The invention relates to a nanocellulose-silicon-based hybrid material, preparation and application thereof and a thermoplastic polymer composite material. Comprising the following steps: combining nano SiO2 containing hydrophilic hydroxyl on the surface with hydroxyl on the surface of cellulose, then adding a silane coupling agent, reacting and hydrolyzing the silane coupling agent to obtain silanol, combining the silanol with hydroxyl on the surface of nano SiO2 particles and hydroxyl on the surface of nano cellulose, drying, dehydrating the silanol into siloxane, and grafting the siloxane on the surface of nano cellulose / SiO2, thereby obtaining the nano SiO2 / silanol composite material. Grinding to obtain a nanocellulose-silicon-based hybrid material, blending the obtained hybrid material with a thermoplastic polymer matrix, and preparing a corresponding product through a thermal forming process. The process is environment-friendly, the method is simple, the product is easy to form, operation and control are simple and convenient, and industrial production is facilitated; the prepared hybrid material has good stability, dispersibility and polymer matrix compatibility, and shows excellent mechanical properties and thermal properties when applied to thermoplastic polymers.

The invention provides a thermoelectricity-hydrogen-methanol green co-production system and method. The system comprises an alkaline electrolytic cell module, a hydrogen separation and purification module, an oxygen separation module, a preheating module, a thermoelectric production module, a flue gas pretreatment module, a CO2 capture module and a CO2 hydrogenation methanol preparation module. CO2 capture is carried out on flue gas generated by coal-fired thermoelectricity, and resource utilization is carried out; meanwhile, hydrogen prepared by green electricity water electrolysis hydrogen production not only can be output and supplied, but also can be used for methanol preparation together with captured CO2, and prepared high-purity oxygen and part of flue gas subjected to flue gas pretreatment are supplied to a thermoelectric production module, so that oxygen-enriched combustion of coal is realized, the CO2 content in the flue gas can be greatly increased, CO2 capture is facilitated, and the energy consumption is reduced. Under the condition that thermoelectric supply is not affected, CO2 emission can be greatly reduced, hydrogen and methanol which are urgently needed by the market can be prepared, and meanwhile the whole process is green and environmentally friendly.

The invention belongs to the technical field of photo-thermal water and power cogeneration, and particularly relates to a preparation method of super-hydrophilic photo-thermal carbon fiber cloth and a water photovoltaic power generation sheet. The preparation method comprises the following steps: dispersing photo-thermal conversion particles into a sodium dodecylbenzene sulfonate solution to obtain a photo-thermal conversion coating, soaking carbon fiber cloth into the photo-thermal conversion coating to enable the photo-thermal conversion particles to be attached to the carbon fiber cloth to obtain the photo-thermal carbon fiber cloth, and drying the photo-thermal carbon fiber cloth to obtain the photo-thermal carbon fiber cloth. And then the surface of the photo-thermal carbon fiber cloth is coated with a thermoplastic polyurethane solution to improve the hydrophilic property of the photo-thermal carbon fiber cloth, and therefore the super-hydrophilic carbon fiber cloth with the high photo-thermal conversion performance is prepared. In the photo-thermal evaporation process, different photo-thermal conversion particle loading capacities of the carbon fiber cloth present different evaporation rates, different thermoplastic polyurethane solution brushing times of the carbon fiber cloth present different contact angles and interface evaporation temperatures, the generating capacity of the water photovoltaic power generation sheet is tested, and finally efficient photo-thermal water-power cogeneration application is achieved.

The invention discloses a method for separating and recovering valuable elements in zinc leaching residues, which comprises the following steps: mixing the zinc leaching residues with a sulfuric acid solution, adding a reducing agent, stirring to react under certain conditions, and performing solid-liquid separation after the reaction is finished to obtain filtrate 1 and filter residues 1; mixing the filter residue 1 with an oxalic acid solution, carrying out a stirring reaction under certain conditions, after the reaction is finished, filtering to obtain a filtrate 2 and a filter residue 2, carrying out a neutralization reaction on the filtrate 2 to hydrolyze and precipitate tin in the solution, and filtering to obtain a filtrate 3 and a stannous hydroxide precipitate; mixing and stirring the filtrate 1 and the filtrate 3, and filtering to obtain filtrate 4 and ferrous oxalate precipitate; according to the method, valuable elements in the zinc leaching residues are separated and recycled one by one, especially for Ga, Ge, In and Sn which are low in grade, effective enrichment and recycling can be achieved, maximum utilization of valuable metal resources is achieved, and generation of solid waste is reduced.

The application discloses a preparation method of three-dimensional hollow carbon spheres. The three-dimensional hollow carbon spheres are prepared by one-step pyrolysis method through the three-dimensional network structure of melamine foam and the compounding of MOFs materials. The method is simple in process, environment-friendly, low in cost and capable of industrial production. The three-dimensional hollow carbon spheres prepared by the method have uniform and good micro-morphology, the carbon spheres are hollow in the inside, each carbon sphere has four branches connected with other carbon spheres, and multiple carbon spheres are connected to form a three-dimensional network structure.

The invention discloses a method for synthesizing a cefvimicin mother nucleus by an enzymic method, which belongs to the technical field of medicine synthesis, and comprises two working sections: 1, removing a carboxyl protecting group from a double-protection mother nucleus Sm to obtain an aqueous solution of a salt of an intermediate A; and 2, removing an amino protecting group from the intermediate A by an enzymic method to obtain the cefvimicin mother nucleus. The process for preparing the cefvimicin mother nucleus is green and environment-friendly, does not have harsh conditions such as no water, no oxygen, ultralow temperature and the like, does not generate substances with strong corrosivity, is friendly to production equipment, is easy to recycle a waste solvent, and has low wastewater treatment requirements.

The present invention discloses a material surface treatment device and method, the device includes a feeding device, an ultrasonic cleaning device, a vacuum drying device, a vacuum plasma cleaning device, and a discharging device which are arranged in sequence; the ultrasonic cleaning device includes an ultrasonic cleaning tank for accommodating a hydrocarbon cleaning agent, and is provided with a first outlet and an inlet, and the first outlet and the inlet are connected to a first separation circulation system, the first separation circulation system is used to distill and regenerate the hydrocarbon cleaning agent; the first separation circulation system includes a first separation tank, a hydrocarbon cleaning agent evaporation device, and a hydrocarbon cleaning agent condensation device which are connected in sequence. Ultrasonic hydrocarbon washing is used to replace ultrasonic water washing, the hydrocarbon cleaning agent is recycled, and the three steps of hydrocarbon cleaning, vacuum drying, and vacuum plasma cleaning are combined in sequence, so as to achieve zero discharge of waste gas and wastewater, and be green and environmentally friendly.

The application discloses a method for preparing xanthine from guanine by using an enzyme as a catalyst and application thereof, and belongs to the technical field of bioengineering. The method comprises the following steps: dissolving guanine in water to prepare a 2%-20% solution, adding guanine deaminase, and reacting at 40-50 DEG C and pH 6.5-7.5 for 20-40 hours; and then filtering and drying to obtain xanthine. The amino acid sequence of the guanine deaminase is shown as SEQ ID NO. 1, and the guanine deaminase can be obtained by expressing recombinant Escherichia coli. The method has the advantages of mild reaction conditions, high specificity, no by-products, a xanthine yield of more than 90%, high purity of more than 99%, green environmental protection, cost advantage and suitability for industrial production.

The invention relates to the technical field of low-carbon olefin preparation, and discloses a method and a system for preparing low-carbon olefin by cracking a petroleum raw material and application of the method and the system. According to the method provided by the invention, unrefined crude oil can be directly used as a raw material for preparing the low-carbon olefin, and the method has the characteristics of wide raw material source and low cost, and also has the advantages of high product yield, high production efficiency and the like, so that the method is very suitable for industrial popularization and application.

The invention discloses a step-by-step impurity removal method for impurity-containing gold-loaded resin, and belongs to the technical field of mineral processing. The method specifically comprises the following steps: mixing the impurity-containing gold-loaded resin into slurry, putting the slurry into a small-sized thickener, stirring, standing, and removing fine light flocculent impurities on the upper layer; the impurity-removed gold-loaded resin is subjected to size mixing and placed in a vibrating spiral chute, large-specific-gravity coarse-particle colloidal impurities are removed, then the impurity-removed gold-loaded resin is placed in a multi-layer wet-type vibrating screening machine, pine needles, wood chips and other impurities with large particle sizes are removed through an upper-layer large-aperture vibrating screen, fine-crushed humus impurities are removed from an upper-layer undersize material through a lower-layer small-aperture vibrating screen, and the gold-loaded resin is subjected to impurity removal; the undersize is impurity-removed gold-loaded resin; all the obtained impurities are combined and checked and screened through a suspended vibration conical surface sorting machine, coarse particle products are impurities, and a small amount of fine particle products are resin. Aiming at the characteristics of different impurities in the gold-carrying resin, the invention develops a unique step-by-step impurity removal process, and high-quality gold extraction raw materials can be provided for resin ore pulp process enterprises.

The invention relates to the technical field of aluminum material processing oil, and particularly discloses an environment-friendly residue-free aluminum material processing oil composition and a preparation method thereof. The environment-friendly residue-free aluminum product processing oil composition is prepared from the following raw materials in parts by weight: 60 to 100 parts of polyglycol ether, 2 to 17 parts of synthetic ester, 0.5 to 2.5 parts of antioxidant, 0.1 to 0.5 part of metal corrosion inhibitor and 0.1 to 3 parts of tackifier. The synthetic ester comprises star-shaped complex ester, and the star-shaped complex ester comprises the following raw materials: pentaerythritol, oleic acid, phenylphosphonic acid and boric acid. The environment-friendly residue-free aluminum product processing oil composition disclosed by the invention can be used for forming and processing aluminum products, can effectively inhibit oxidation caused by factors such as high-temperature friction heat and metal catalysis in a cyclic heating process under heavy-load and high-temperature working conditions, can realize almost no residue after aluminum product post-treatment at 540 DEG C, ensures that the surfaces of the aluminum products are bright and free of discoloration, and has the advantages of simple process, low cost and the like. And the subsequent cleaning procedure is omitted.

The invention discloses a production process of 2, 3-dichloropyridine, which comprises the following steps: by taking 2-chloropyridine as a starting material, trichloromethane as a medium and ferric trichloride as Lewis acid, carrying out chlorination reaction on 2-chloropyridine and N, N ', N'-trichloro-1, 3-diphenylguanidine, after the reaction is finished, extracting and separating liquid from the reaction mixture, filtering, washing and drying to obtain 2, 3-dichloropyridine. And combining the organic phases, concentrating under reduced pressure to obtain a crude product, and rectifying the crude product to obtain the 2, 3-dichloropyridine. According to the invention, 2-chloropyridine which is cheap and easy to obtain is taken as a starting raw material, so that the problem that main raw materials are not easy to obtain is solved. According to the method, N, N ', N'-trichloro-1, 3-diphenyl guanidine is adopted as a chlorine source, ferric trichloride is adopted as lewis acid, the chlorination reaction selectivity is high, side reactions are few, and the reaction yield is high. The yield of 2, 3-dichloropyridine can be stabilized at 90% or above, the production efficiency is high, the process is green and environment-friendly, and the method is suitable for industrial production.

This invention relates to a flame retardant with both microwave absorption and smoke suppression functions. The flame retardant is a hierarchical porous metal-organic framework material with a three-dimensional polygonal structure, a size of 1-3 μm, and a pore size distribution between 1.0-50.0 nm. It carries nano-transition metal oxides internally and on its surface, with the nano-transition metal oxides accounting for 25%-65% of the total mass. The flame retardant provided by this invention possesses microwave absorption, flame retardancy, and smoke suppression properties. Its initial decomposition temperature is 442℃±10℃, with significant mass loss in the temperature range of 450-700℃. At 800℃, the residue content is as high as 50% or more, exhibiting excellent thermal stability and meeting the processing requirements for flame retardants in polyurea, epoxy resin, and polycarbonate.

The application discloses a method for preparing polyethylene wax by using a carborane bridged rare earth metallocene catalyst, and simultaneously preparing a carborane bridged indenyl rare earth metallocene compound as a main catalyst, loading the prepared main catalyst and a cocatalyst on a magnetic mesoporous Fe3O4@Al2O3 core-shell nanoparticle carrier to obtain a supported rare earth metallocene catalyst; the main catalyst of the application is a carborane bridged indenyl rare earth metallocene compound with a structure shown in formula (I), wherein a bridging group adopts a closed carborane (closed-1,2-dicarbadodecaborane), and the cage-like three-dimensional structure has super-high thermal stability and chemical inertness and does not degrade or rearrange in a high-temperature molten state of 130-200 DEG C. Large-volume substituents such as methyl, tert-butyl, phenyl or 4-tert-butylphenyl are introduced on the indene ring to provide sufficient steric protection and further inhibit chain transfer and side reactions at high temperatures.

The invention relates to the field of photovoltaic power generation, and mainly relates to a Fe2O3 nanorod array perovskite solar cell and a preparation method thereof. The preparation method of the Fe2O3 nanorod array perovskite solar cell is provided for solving the problems that in the prior art, a physical coating technology is complex in process, high in cost and low in production efficiency. A Nb-TiO2 compact layer is prepared through a hydrolysis-pyrolysis method, a Fe2O3 nano array is prepared through a hydrothermal method, a CH3NH3PbI3-xBrx thin film is prepared through a continuous two-step deposition method, a hole transport layer is prepared through a deposition method, and the Fe2O3 nano rod array perovskite solar cell is prepared. The method is simple and environment-friendly in process, low in cost and high in production efficiency.

The invention provides a method for liquefying and recovering dimethyl ether in mixed gas, which comprises the following steps: feeding raw material gas containing 3-9% of gaseous dimethyl ether into a washing tower, washing the dimethyl ether in the raw material gas until the content of the dimethyl ether in the raw material gas is below 1%, cooling dimethyl ether liquid for washing to keep the circulating temperature of the dimethyl ether liquid below 40 DEG C, the method comprises the following steps of: washing raw material gas, feeding the washed raw material gas into a first-stage temperature swing adsorption tower group consisting of two or more towers to finally obtain product gas in which the total content of dimethyl ether, methyl acetate and methanol is less than 100ppm, and carrying out isobaric back flushing operation on the adsorption towers by using the raw material gas heated to 140-160 DEG C as regenerated gas to achieve the purpose of recovering dimethyl ether. And after the regeneration of the adsorption tower is finished, the adsorption tower is cooled to enter the next cycle. According to the method, the dimethyl ether can be efficiently recycled, and the economic and environment-friendly requirements are met.

The invention relates to the technical field of aerogel, and provides a super-hydrophobic flexible aerogel heat insulation film as well as a preparation method and application thereof. The aerogel film comprises aerogel particles subjected to hydrophobic modification treatment and an in-situ fiberized fiber binder, the aerogel particles subjected to hydrophobic modification treatment are wound and anchored by a three-dimensional network structure formed by the in-situ fiberized fiber binder. The aerogel particles subjected to hydrophobic modification treatment and the fiber binder are used as raw materials, a specific process is adopted for processing, a fiber three-dimensional network anchored aerogel particle composite structure is constructed, the problem of aerogel brittleness and the process problem of uniform fibrosis of the fiber binder are solved, and the fiber three-dimensional network anchored aerogel particle composite structure is obtained. The preparation of the aerogel film with excellent comprehensive performance is realized.

This invention discloses a method for processing high-transparency and high-colorfastness wool cellulose fiber segment-dyed and spray-dyed yarn using multi-enzyme synergistic pretreatment and its application. The processing method includes: yarn pretreatment, keratinase pretreatment, synergistic treatment of keratinase and protease, cellulase treatment, synergistic inactivation of multiple enzymes and pH control, preparation of anionic pigment paste, segment-dyed spray-dyeing, and drying and curing fixation. The synergistic pretreatment of keratinase, keratinase, protease, and cellulase forms a technical chain of barrier breaking, loosening, chain reduction, and coarsening, resulting in a dye penetration index of >80% for the pigment spraying. The pH-controlled wool fibers carry a strong positive charge, which strongly electrostatically adsorbs with the anionic pigment paste, achieving a dry rubbing colorfastness of 4-5 and a wet rubbing colorfastness of 4. The fiber strength loss is small, and the method is environmentally friendly. It is suitable for segment-dyed and spray-dyed yarns of pure wool and blended yarns of wool with cellulose fibers such as cotton, viscose, Tencel, and Modal, and can be widely used in home textiles, clothing, and other fields.

The invention relates to a copper sulfide-platinum reticular ultrathin nanosheet as well as a preparation method and application thereof. The microstructure of the nanosheet is a two-dimensional reticular structure consisting of copper sulfide and platinum. The copper sulphide-platinum ultrathin nanosheet is prepared through a replacement reaction means, and the net structure of the copper sulphide-platinum nanosheet is effectively regulated and controlled, so that the catalytic photodegradation performance of the copper sulphide-platinum ultrathin nanosheet is improved. The porous structure and the ultrathin structure of the copper sulfide-platinum netted ultrathin nanosheet are beneficial to providing abundant active sites, high specific surface area, efficient charge transfer and the like, and can provide better photodegradation efficiency. The preparation steps are simple, reactants are low in toxicity, hazardous chemicals are not contained, and the process is green and environment-friendly.

The invention belongs to the technical field of high polymer material synthesis and preparation, and particularly relates to a preparation method of MBS (methyl methacrylate-butadiene-styrene) resin, which comprises the following steps: by taking styrene, acrylate monomers and toughened rubber particles as raw materials, under the combined action of an antioxidant, an initiator and a chain transfer agent, optimizing the technical process and adjusting the technical parameters, thereby obtaining the MBS resin. Three-stage key process steps of internal circulation prepolymerization, polymerization in a second-stage reactor and grafting in a static mixer are set, and the feeding proportion of reaction materials, catalytic materials and the like, and the reaction temperature, the stirring speed, the retention time, the solid content proportion and the like of each process step are accurately controlled. The prepared MBS resin is pure, low in odor, uniform in rubber particle distribution, adjustable in rubber content, high in grafting rate, good in transparency, low in haze and good in impact resistance. Compared with a traditional emulsion polymerization method, the preparation method has the advantages that the technological process is shortened, the operation stability is good, the investment and production cost is reduced, the environmental pollution is reduced, and the preparation method has good market prospects and application and popularization values.

The application discloses a kind of water-based dispersant and preparation method thereof, belong to pigment dispersant technical field.The water-based dispersant is random copolymer obtained by radical copolymerization of maleic acid mono-aromatic ester intermediate and hydrophilic polymerizable monomer, and hydrophilic carboxyl group and hydrophobic benzyl side chain or phenylethyl side chain are distributed in the side group of its molecular main chain.The dispersant is prepared by esterification, neutralization and water phase copolymerization three-step reaction, the preparation process of the application is green and environmentally friendly, no organic solvent residue, the obtained dispersant realizes pigment anchoring through the π-π conjugation of hydrophobic side chain, and the hydrophilic carboxylate group realizes electrostatic stabilization, and the double synergistic effect significantly improves dispersibility and storage stability, especially suitable for phthalocyanine blue and other aromatic ring-containing pigments dispersion, and can be widely applied in the field of paint, ink and the like.

The present invention discloses a system for controlling and coordinating the unorganized emission of waste gas from a delayed coking coke storage tank. The fully enclosed system of the coke storage tank wraps the coke storage tank, sewage treatment tank, top coke grabbing crane, open-air trestle of the crane, automobile transportation channel and loading hopper in the delayed coking process, including a coke storage tank solar film enclosed system, a ventilation system in the shed, and a dust suppression system for grabbing and unloading coke in the shed; the coke storage tank solar film enclosed system is a membrane structure shed; the dust suppression system for grabbing and unloading coke in the shed includes a dust suppression spray cannon, which is used to spray natural plant deodorizing liquid to coke powder in the shed when grabbing and unloading coke; the waste gas collection system includes an exhaust hood, a resistance balancer, an electric air volume regulating valve, and a waste gas collection pipe network; the waste gas treatment system includes a fan, a cooling tower, a demister, and a spray tower. The present invention solves the problem of unorganized emission of waste gas from delayed coking, has good waste gas control effect, covers a wide area, and does not affect the normal progress of the main production process.

The utility model discloses a novel feed hopper sealing structure for household garbage power generation, relates to the technical field of household garbage power generation, aims to solve the problems that an existing sealing structure is prone to being blocked and abraded and inconvenient to maintain, and comprises a feed hopper, an upper sealing plate and a lower sealing plate. The inclination degrees of the front plate and the rear plate are different. The two groups of upper sealing plates are symmetrical to a top opening of the feeding hopper, are matched with upper reset grooves through traction columns and guide columns, and are reset by upper reset springs to realize top sealing; according to the feeding hopper sealing structure, through double sealing and cooperation of all parts, the problems that an existing feeding hopper sealing structure is poor in sealing performance, unsmooth in feeding and the like are solved, and the feeding hopper sealing structure has the advantages of being excellent in sealing performance, smooth in feeding, stable, reliable, convenient to maintain and the like; odor dust can be effectively prevented, the equipment environment is maintained, and the power generation efficiency is improved.

The present invention belongs to the technical field of catalyst synthesis, and specifically relates to a composite mesoporous molecular sieve catalyst and its application in the preparation of arabinose. The catalyst of the present invention uses mesoporous molecular sieve SBA-15 as a carrier and metal oxides such as tin, aluminum, cobalt, and cerium as active ingredients, and can be used to catalyze the hydrolysis reaction of crop straw, residues, etc. x O y / SBA‑15 catalyst not only has the advantages of solid acid and the acidity characteristics of Lewis acid, but also does not contain SO4 2‑ ions, has excellent catalytic performance, and can be recycled for multiple times. The mesoporous molecular sieve SBA-15 is prepared by the following steps: 1) mixing the template with tetraethyl orthosilicate and hydrochloric acid to obtain a reactant; 2) reacting the reactant for 12-24 hours to obtain a solid product, washing, drying, and roasting to obtain the mesoporous molecular sieve SBA-15. The catalyst prepared by the present invention is used in the catalytic hydrolysis reaction of corn husks, and arabinose can be directly obtained, with a high yield of the target product and good application prospects.

The invention belongs to the field of agricultural fertilizers, and provides a micro-mineral activator and an application thereof in improving the fertilizer efficiency of a bio-organic fertilizer. According to the invention, epoxy silane coupling modified potassium feldspar powder is adopted as a core to construct a two-phase collaborative design of humic acid coated core-shell composite powder IM-X and metal ion crosslinked microgel powder IM-Y; the balance between the compressive strength of the particles and the rapid disintegration and dispersion performance when encountering water is realized, the consideration of a high-solid-content low-water-adding-amount granulation process window and the rheological stability of a humic acid cross-linked network is considered, and the unification of moisture absorption and caking resistance during storage and transportation and water absorption and retention ion response regulation and control functions after application is realized; the mineral-organic composite additive solves the performance coupling contradiction of natural conflicts in physical and chemical mechanisms of the existing mineral-organic composite additive, has the advantages of good processing controllability, excellent storage and transportation stability and remarkable fertilizer efficiency improvement effect, and has wide application value in the field of bio-organic fertilizer synergism.

The invention discloses a method for efficiently purifying gardenia blue pigment based on combination of ion exchange resin and an ultrafiltration membrane, and belongs to the technical field of natural pigment purification. The method comprises the following steps: adjusting the pH value of a gardenia blue pigment crude product solution to 5.0-7.0, pretreating, loading to anion exchange resin for adsorption, sequentially carrying out gradient elution by using 5% and 10% NaCl aqueous solutions, collecting pigment eluents with different molecular weight proportions, separating by using an ultrafiltration membrane with the molecular weight cut-off of 1000-4000 Da, and finally concentrating and drying. According to the method, efficient and specific removal of gardenoside, genipin and methanol is synergistically realized through charge selective adsorption and gradient elution of ion exchange resin in combination with precise screening of an ultrafiltration membrane, meanwhile, the pigment recovery rate is greater than 95%, the product impurity residue is low, the process is green, and the method is suitable for industrial production.

The invention discloses a direct high-temperature regeneration method of a waste lithium iron phosphate positive plate in a water vapor atmosphere. The method comprises the following steps: directly placing the positive plate obtained by discharging and disassembling the waste lithium iron phosphate battery into a reaction container, directly regenerating at 600-650 DEG C by taking superheated steam as a gasification medium, and removing aluminum foil after the regeneration process is completed, thereby obtaining the regenerated lithium iron phosphate positive plate. According to the method provided by the invention, the structure of lithium iron phosphate can be completely repaired at a relatively low temperature, and aluminum foil fusion is avoided. Compared with a traditional recycling process, the method has the advantages that complex pretreatment steps such as smashing, screening and stripping are omitted, material loss is reduced, the whole process is mild and environmentally friendly, and the method is short in process and easy and convenient to operate.

The utility model relates to a novel embedded packaging structure, including PCB board, chip and backing plate, the upper surface of backing plate is opened with mounting hole, the chip sintering is installed in mounting hole and is flush with the upper surface of backing plate and forms chip unit, the lower surface of PCB board is connected with a plurality of chip unit. This structure directly adopts the backing plate of copper material and is welded or sintering connection with PCB, need not to be plated copper, has reduced the process complexity, has reduced the chip warping risk, and the process is more environmental protection;The present application need not laser drilling, uses mature mechanical drilling + plating process instead reduces the process complexity, improves the yield rate;Move the chip to the outside of PCB, avoid the warping deformation caused by the big CTE difference between chip and PCB material, avoid the equipment damage, the mounting difficulty etc. caused by the high warping of PCB;The radiator is in direct contact with the backing plate through the connecting layer, and the heat dissipation path is shorter, the thermal resistance is lower, and the heat dissipation efficiency is improved.