25results about How to "Craft green" patented technology

The invention belongs to the field of fine chemical engineering, and particularly relates to a continuous production device and method of high-purity isosorbide. The device comprises a reaction unit, a separation unit and a purification unit which are sequentially connected, the reaction unit comprises a preheater and a reactor, the separation unit comprises a settling tank, a filter, a dehydrating tower and a distillation tower, and the purification unit comprises a decolorizing tower, a rectifying tower and a crystallizing tower. A sorbitol raw material enters a preheater to be preheated, the preheated material enters a reactor to be subjected to a dehydration reaction, the reacted material flows out of a discharging port in the upper portion of the reactor to enter a shell pass of a dehydration tower to be subjected to heat exchange and cooling, the cooled material enters a settling tank to settle solid waste, supernate enters a filter to be filtered, and a liquid phase flows into the dehydration tower to be subjected to water removal and concentration; and distilling out crude isosorbide in a distillation tower, and purifying the isosorbide crude product through a decolorizing tower, a rectifying tower and a crystallizing tower to obtain the high-purity isosorbide. The method has the outstanding characteristics of continuous production, separation and purification, and continuous production of high-purity isosorbide can be realized.

The embodiment of the invention provides a lithium iron manganese phosphate positive electrode material and a preparation method thereof, a positive electrode plate and a lithium ion battery, the preparation method comprises the following steps: dispersing a lithium source and a phosphorus source in a dispersant, then adding a manganese source and lithium iron phosphate to form a uniform mixed slurry, the proportion of a solid substance is greater than or equal to 45%, and the dispersant comprises ethylene glycol and / or water; placing the mixed slurry in a closed device, and carrying out a synthetic reaction under a certain condition to obtain a lithium manganese iron phosphate precursor; and carrying out high-temperature sintering on the lithium manganese iron phosphate precursor to obtain the lithium manganese iron phosphate positive electrode material. According to the preparation method of the lithium iron manganese phosphate positive electrode material provided by the embodiment of the invention, lithium iron phosphate is adopted as a template, the lithium iron manganese phosphate positive electrode material with high compaction and high performance is synthesized, no waste material or waste gas is generated, and the method is green and environment-friendly; the dispersing agent is small in usage amount and simple and efficient in process; the reaction atom utilization rate is high, the dispersant can be recycled, and the cost can be reduced; the method can be used for recycling the LiFePO4 material, and the additional value of the LiFePO4 material

This invention belongs to the field of cosmetic raw material preparation technology, specifically relating to a method for preparing a low-odor Xinjiang Lithospermum extract, its product, and its application. The method includes: raw material pretreatment: drying and pulverizing Xinjiang Lithospermum raw material to obtain pretreated material; first-stage extraction: loading the pretreated material into a supercritical fluid extraction device, adding a composite entrainer for extraction, and collecting the first fraction in a first separator; second-stage extraction: collecting a second fraction rich in naphthoquinone components in a second separator; and post-treatment: concentrating the second fraction and removing the alcohol solvent to obtain the low-odor Xinjiang Lithospermum extract. This invention can separate and discard most of the odor-causing volatile components in the raw material under mild conditions in the first stage, and then efficiently extract the core active substances of naphthoquinone in the second stage, achieving a significant reduction in the odor of the extract and a significant improvement in its sensory quality.

The invention discloses an iron-carbon catalytic material based on coal gasification slag as well as a preparation method and application of the iron-carbon catalytic material, and belongs to the technical field of industrial solid waste recycling. The preparation method comprises the following steps: adding dried coal gasification slag into an oxalic acid solution for extraction to obtain a suspension A; adding a reducing agent into the suspension A, carrying out precipitation reaction, and then carrying out solid-liquid separation to obtain a solid B; and sintering the solid B to obtain the composite material. The invention further discloses the iron-carbon catalytic material based on the coal gasification slag prepared by the method and application of the iron-carbon catalytic material. According to the method, the industrial solid waste coal gasification slag is used as a carrier, endogenous iron in the coal gasification slag is converted by adopting an acid leaching-reduction precipitation-roasting method, the iron-supported catalytic material with a stable structure and excellent performance is obtained, the process is green, the cost is low, the organic wastewater treatment capacity is excellent, and the practical value is relatively good.

The invention belongs to the technical field of functional polymer materials and photocatalysis, and particularly relates to a preparation method and application of an antibacterial coating based on polyvinyl chloride plastics. Comprising the following steps: S1, pretreatment; s2, carrying out a reaction; s3, post-processing is carried out; s4, compounding with polyelectrolyte; and S5, preparing the coating. Through a specific catalytic cracking process, the waste PVC is converted into a functional photocatalytic antibacterial coating material, so that resource utilization and functional utilization of the waste chlorine-containing plastic are realized; a catalytic cracking process under a solvent-free condition is adopted, so that the use of an organic solvent is avoided; the coating material has relatively good photochemical stability, and can realize a relatively lasting antibacterial effect; the method has relatively low requirements on equipment, reaction conditions are easy to control, and the method is not only suitable for laboratory research, but also convenient for engineering and industrial amplification. And by combining the processing performance of the obtained coating, the technology has popularization and application potential.

The invention discloses a system for continuous green electrocatalytic synthesis of high-concentration hydrogen peroxide. The hydrogen peroxide synthesized through electrocatalysis can be directly used for the back-end olefin epoxidation reaction after being concentrated, the safety problem caused by easy explosion in the high-concentration hydrogen peroxide transportation process is avoided, the cost problem caused by hydrogen peroxide transportation is solved, and the greenness and economic added value of the whole technological process are increased. In the electrocatalytic synthesis process of hydrogen peroxide, the solid electrolyte is matched with water for use, so that the problem of subsequent separation caused by use of liquid electrolyte in the traditional electrocatalytic synthesis process of hydrogen peroxide is solved. Compared with an anthraquinone method in which hydrogen peroxide is concentrated from an organic solvent, the method has the advantage that the hydrogen peroxide concentration process is simple, convenient, green and economical due to mixing of water generated by electro-catalysis and hydrogen peroxide in the process.

The invention discloses a resveratrol liposome applied to a liquid preparation product and a preparation method of the resveratrol liposome. The resveratrol liposome is prepared from resveratrol, high-water-absorption protein, cyclodextrin and phospholipid. In the liposome, the mass percentage content of resveratrol is less than or equal to 40% and greater than or equal to 10%, the mass percentage content of high-water-absorption protein is greater than 15%, the mass percentage content of cyclodextrin is greater than or equal to 10%, and the mass percentage content of phospholipid component is less than or equal to 2% and greater than or equal to 0.5%. Compared with the prior art, the preparation method has the advantages that the technological process is green, simple and easy to operate, an ethanol solvent is not needed, the product yield is high, continuous production can be realized, and the prepared finished product is relatively high in dispersity in water and relatively high in product stability.

The invention discloses a bamboo-based derived nitrogen-doped hard carbon negative electrode material and a preparation method and application thereof.The preparation method creatively utilizes the characteristic that bamboo wood is rich in natural phenolic hydroxyl groups and comprises the steps that bamboo powder and an aldehyde group compound are subjected to in-situ phenol-aldehyde polycondensation under the alkaline condition, and a cross-linked network precursor is constructed; then adjusting the pH to weak acidity, and carrying out in-situ amination doping with a nitrogen-containing compound; and finally, carbonizing to obtain the nitrogen-doped hard carbon material. According to the method, structural reconstruction and uniform nitrogen doping of the bamboo-based precursor are synchronously realized through two-step continuous molecular-level reaction of'alkaline polycondensation-acidic amination '. When the obtained material is used as a sodium ion battery negative electrode, high reversible specific capacity (greater than 304 mAh / g), high first coulombic efficiency (greater than 92%) and excellent cycling stability (300-week capacity retention rate at 0.5 C is greater than 92%) are shown. The method is simple in process, green, low in cost and suitable for large-scale production.

This invention relates to the field of biodegradable packaging film technology, and in particular to a biodegradable packaging film containing mulberry leaf extract and its preparation method. The film is prepared from the following raw materials in parts by weight: 40-60 parts chitosan, 20-30 parts sodium alginate, 10-20 parts gelatin, 1-3 parts nano zinc oxide, 3-8 parts mulberry leaf extract, 0.5-1.5 parts crosslinking agent, 3-6 parts plasticizer, 0.1-0.5 parts nano titanium dioxide, and 0.5-1 parts cellulose nanocrystals. This invention uses chitosan, sodium alginate, and gelatin as biodegradable matrices, and combines them with mulberry leaf extract, nano zinc oxide, nano titanium dioxide, and cellulose nanocrystals. These are crosslinked with a food-grade crosslinking agent to form a dense three-dimensional network. The resulting packaging film possesses biodegradability, high strength and high barrier properties, water resistance, broad-spectrum antibacterial properties, strong antioxidant properties, and highly efficient photocatalytic ethylene removal capabilities. The entire preparation process is green, leaves no organic solvent residue, and is simple to operate.

This invention relates to the field of new energy materials technology, and particularly to a high-entropy oxide particle, its preparation method, and its application. The invention involves mixing a polyacrylonitrile solution and a metal precursor to obtain a mixed liquid; spraying the mixed liquid into droplets and injecting it into water to obtain composite particles; drying the composite particles and then heat-treating them in air to obtain a microsphere-shaped metal precursor; calcining the microsphere-shaped metal precursor to obtain high-entropy oxide particles. This method is simple and scalable, meets the synthesis requirements of various high-entropy systems, and the resulting micro-regions are easy to refine with uniform elemental proportions, without introducing any impurities. It overcomes the problems of high cost, impurity introduction, and complex processes associated with traditional oxide material synthesis.

The invention relates to the technical field of wastewater treatment, in particular to a safe treatment and resource recycling system and method for urea hydrolysis wastewater, and the system comprises a wastewater tank, a security filter, an electrodialysis device, a thermal decomposition deamination device, an ammonia water tank, a urea dissolving tank and a urea hydrolysis tank which are communicated in sequence; wherein the urea hydrolysis tank is communicated with the wastewater tank; the wastewater tank is communicated with the security filter through a heat exchanger; the electrodialysis device is communicated with the thermal decomposition deamination device through a heat exchanger; the electrodialysis device is also communicated with the urea dissolving tank; and the thermal decomposition deamination device is also connected with an alkali liquor tank. The system can realize efficient cyclic utilization of urea hydrolysis wastewater, meets resource recovery of valuable substances in the wastewater, effectively removes high-concentration harmful ions, reduces energy consumption and the use amount of cooling water and dissolving water, can ensure the characteristics of safety, greenness, low carbon and cycle of the process, and has a wide application prospect. And the production and maintenance cost of a power plant is obviously reduced.

This invention relates to the field of sodium-ion battery technology, specifically disclosing a sodium iron pyrophosphate (NFPP) cathode material, its preparation method, and its application. The preparation method includes: using iron phosphate as the iron source, mixing it with a specific sodium source, phosphorus source, and composite carbon source; adjusting with deionized water; and then performing precision sand milling to control the slurry particle size D50 within 0.30~0.35 μm to ensure uniform elemental mixing; subsequently, spray drying is performed to obtain a precursor with high sphericity and narrow particle size distribution; finally, programmed sintering is carried out under an inert atmosphere to obtain the final product. This invention solves the problems of uneven elemental distribution, impurity phase formation, low material compaction density, and poor electrochemical performance in existing technologies through synergistic optimization of the entire process chain of sand milling-spray drying-sintering. The obtained NFPP material has a high-purity phase structure. The sodium iron pyrophosphate cathode material prepared by the method of this invention can achieve a 0.1C discharge specific capacity of 101 mA·hg. ‑1 The 1C discharge specific capacity can reach 93 mA·hg ‑1 It is suitable for the preparation of high-performance sodium-ion batteries.

The invention discloses a method for preparing vinyl ether by taking ethylene glycol as a raw material. According to the method, industrial raw materials including ethylene glycol and alkyl alcohol which are low in price are adopted, a solid acid catalyst and a solid base catalyst are used for catalyzing an etherification reaction and a cracking reaction respectively, and therefore the vinyl ether product with the high additional value is prepared. The method is good in economic benefit, and the technology and the device are high in universality; a green reaction process is adopted, the process is safe and environment-friendly, and the device can be large-scale; the cracking byproduct alcohol is recycled as an etherification reaction raw material, the raw material utilization rate is high, and energy utilization is reasonable.

The invention belongs to the field of electrochemistry and green synthesis, and particularly relates to a preparation method and application of quinoxalinone substituted by cyanoalkyl at the C3 position. The preparation method comprises the following steps: by taking quinoxalinone and acrylonitrile as reaction raw materials, adding an electrolyte, an organic solvent and an additive, and carrying out electrolytic reaction to obtain the C3-position cyanoalkyl substituted quinoxalinone. The method for electrolytically synthesizing the C3-position cyanoalkyl substituted quinoxalinone is reported for the first time, acrylonitrile which is low in price and easy to obtain serves as an alkyl source, pre-activation of a substrate is not needed, operation is easy, cost is low, the atom utilization rate is high, participation of a chemical redox reagent is not needed, the reaction temperature is room temperature, and the method is suitable for industrial production. The C3-position cyanoalkyl substituted quinoxalinone can be efficiently and greenly synthesized; the quinoxalinone substituted by cyanoalkyl at the C3 position has good anti-cancer activity, can be used for preparing anti-cancer drugs, and has important application value.

The present application belongs to the technical field of natural product chemical modification, and particularly relates to a chemically modified rare ginsenoside derivative, a preparation method and application thereof. The present application takes rare ginsenoside as raw material, introduces a sulfate group by sulfating modification on the rare ginsenoside to obtain a chemically modified rare ginsenoside derivative; the modifier used in the sulfating modification is a sulfonating agent. The rare ginsenoside is synthesized by conversion with ginsenoside Rb1 as raw material and AlCl3 as catalyst in an ethanol system. The modification method of the present application is simple in operation steps, does not require special equipment, is suitable for large-scale production, and has a broad application prospect in the field of drug preparation development and the like.

This invention discloses a dual-dispersed hydroxyapatite-supported nickel catalyst, its preparation method, and its application in methane dry reforming. The invention employs morphology control and in-situ nickel framework doping strategies to replace calcium ions in the hydroxyapatite support, loading the active nickel component via a coupled impregnation process. Nickel achieves dual, efficient dispersion on the hydroxyapatite support surface and at lattice sites, inhibiting particle sintering during the reaction, enhancing electronic synergy, and improving anti-coking ability. In methane dry reforming, it exhibits advantages such as high conversion rate, high stability, low coking, and long lifespan, significantly improving catalytic activity and high-temperature stability. This invention's process is green, low-cost, and easily scaled up, overcoming the bottlenecks of traditional nickel-based catalysts' sintering, coking, and high cost due to precious metals, providing a new, efficient, and stable catalytic solution for high-temperature methane dry reforming.

The invention discloses a multi-stage series cyanuric acid purification system and process, comprising the following steps: crushing a crude cyanuric acid powder to obtain cyanuric acid powder; using a sulfuric acid solution with a mass percentage of 15%-25% to carry out a primary pickling of the cyanuric acid powder, the mass ratio of the cyanuric acid powder to the sulfuric acid solution is 1:2-3, the primary pickling temperature is 60-80 DEG C, and the time is 4-10min; using a 25%-35% sulfuric acid solution to carry out a secondary pickling of the cyanuric acid powder that has been pickled once, the mass ratio of the cyanuric acid powder to the 25%-35% sulfuric acid solution is 1:1-1.5, the secondary pickling temperature is 80-100 DEG C, and the time is 4-10min; after the secondary pickling is completed, washing with clean water to remove the acid on the surface of the cyanuric acid.

This invention relates to the technical field of solid waste resource utilization and environmental pollution control, and particularly to a method for co-preparing a biochar-steel slag composite adsorbent using steel slag and biomass. First, the raw steel slag is pretreated by coarse grinding, then mechanically activated and modified by high-energy ball milling to obtain finely ground steel slag powder. Next, the finely ground steel slag powder is mixed with a sodium bicarbonate solution and subjected to ultrasonic treatment in a water bath. Then, biochar bran is added in a specific ratio, and further ultrasonic treatment is performed for chemical composite modification. Finally, after solid-liquid separation, washing, and drying, a biochar-steel slag composite structure adsorbent is obtained. This invention, through a combined mechanical and chemical technique, significantly increases the specific surface area of ​​the material, exposes the internal active components, constructs a composite structure, and enriches the surface active functional groups, exhibiting excellent adsorption performance and rapid adsorption kinetics for heavy metal ions in wastewater.

The invention relates to a preparation method of an irradiation temperature-sensitive ruthenium-ethylenediamine tetraacetic acid imprinted polymer, which comprises the following steps: firstly, preparing a linear temperature-sensitive polymer poly N, N-diethylacrylamide by adopting reversible addition-fragmentation chain transfer polymerization; then, the poly N, N-diethylacrylamide is used as an RAFT (reversible addition-fragmentation chain transfer) reagent, and the poly N, N-diethylacrylamide and acrylamide are synthesized into a temperature-sensitive block; and finally, co-dissolving the thermo-sensitive block, acrylamide, acrylic acid, N, N-methylene bisacrylamide and a ruthenium-ethylenediamine tetraacetic acid complex in a methanol aqueous solution, and introducing the thermo-sensitive block through a cobalt-60 irradiation solution polymerization method, thereby obtaining the thermo-sensitive ruthenium-ethylenediamine tetraacetic acid complex imprinted polymer. The preparation method has the characteristics of short time, environmental protection and high production efficiency, and an adsorbent prepared from the obtained thermosensitive ruthenium-ethylenediamine tetraacetic acid imprinted polymer is relatively high in adsorption rate.

The invention discloses a method for synergistically preparing a high-calcium mineral organic water-soluble fertilizer and a citrate-soluble mineral fertilizer from shellfish solid waste and agriculture and forestry biomass. Through cooperation of multi-stage activation and catalysis, the conversion activity of calcium and the quality of humic acid are remarkably improved, the process route integration degree is high, and the technicality is high. The content of water-soluble calcium in the obtained product is more than or equal to 10%, the content of humic acid is more than or equal to 30%, medium trace elements are rich, quick-acting and long-acting fertility is achieved, crop growth can be remarkably promoted, the soil aggregate structure is improved, heavy metal is passivated, crop stress resistance is enhanced, and a new way is provided for high-added-value resource utilization of the two kinds of waste.

The invention discloses an all-component utilization method of jerusalem artichoke, which comprises the following steps of: extracting the jerusalem artichoke which is cut into strips or crushed by using hot water, performing solid-liquid separation, mixing threonine mother liquor into the obtained jerusalem artichoke residues, drying, crushing to obtain jerusalem artichoke meal-based feed, heating an obtained synanthrin solution, regulating the pH value to 11-13 by using lime milk, separating out filter residues, and drying to obtain the jerusalem artichoke meal-based feed. Introducing carbon dioxide gas to adjust the pH value of the filtrate to be neutral, and separating out filter residues to obtain clear inulin mother liquor; adding the filter residue as a feed additive into the jerusalem artichoke meal-based feed; the inulin mother liquor is sequentially subjected to desalination, decoloration and nanofiltration purification operation, the obtained nanofiltration concentrated solution is subjected to evaporation concentration and spray drying to obtain inulin, the obtained nanofiltration dialysate is subjected to reverse osmosis concentration to obtain syrup with 40%-70% of total sugar, and the syrup is directly used as a raw material to prepare 5-hydroxymethylfurfural HMF. The clean jerusalem artichoke processing technology is constructed, no waste is generated in the whole process, the utilization value of the jerusalem artichoke is improved, and a jerusalem artichoke utilization mode which is high in additional value and environmentally friendly is constructed.

The application provides a preparation method and application of a microporous wood-based carbon electrode material, and belongs to the technical field of electrode materials. The method comprises the following steps: putting pretreated basswood and laccase into a buffer solution to obtain single-enzymatic wood chips; putting the single-enzymatic wood chips and hemicellulase into a buffer solution to obtain double-enzymatic wood chips; and putting the double-enzymatic wood chips into hot pressing and high-temperature carbonization to obtain the microporous wood-based carbon electrode material. The application adopts sequential and synergistic degradation of laccase and hemicellulase to accurately and greenly remove lignin and hemicellulose, and then combines with stepwise high-pressure hot pressing densification and inert atmosphere carbonization to realize high enrichment of 0.5-1.0 nm micropores in the bulk wood-based carbon material, optimization of pore connectivity and structure without cracking and deformation. The method is free of toxic reagents and waste liquid discharge, is easy to scale up, significantly improves the conductivity and specific surface area of the material, and guarantees the product qualification rate and performance stability.

The invention provides a recycling method of a lithium iron phosphate battery positive electrode material. The method comprises the following steps: mixing a lithium iron phosphate battery positive electrode material roasted in an inert atmosphere with an alkaline solution with the pH value of 14.2-14.6 according to a liquid-solid volume mass ratio of 30-50 mL / g, leaching at a first temperature, leaching at a second temperature, separating to obtain a leaching solution and ferroferric oxide, adjusting the pH value of the leaching solution to 11.5-13.5, heating to 70-110 DEG C, aging and precipitating lithium, and filtering to obtain the lithium iron phosphate battery positive electrode material. And separating to obtain lithium phosphate and lithium precipitation mother liquor. Wherein the first temperature is 25-45 DEG C, and the second temperature is 5-20 DEG C lower than the first temperature. According to the method, an alkali leaching lithium extraction-lithium precipitation process is adopted, and the liquid-solid ratio is combined with pH and temperature regulation and control, so that efficient leaching of lithium and phosphorus is realized, and lithium phosphate and ferroferric oxide are synchronously recovered. The lithium precipitation reagent is not additionally introduced, the whole process is simple, efficient and green, and the method has important significance on sustainable development of the new energy industry.

The application relates to the technical field of solid electrolytes, in particular to a co-doped sodium-based sulfide solid electrolyte and a preparation method and application thereof, wherein a Na2S-NaD nanoeutectic precursor is prepared by pre-high-energy ball milling of a sodium source and sodium halide, then the precursor is mixed with the remaining raw materials and sintered at a low temperature of 300-450 DEG C, so that the product forms a nanocrystal-glass composite structure which cannot be obtained by a traditional high-temperature solid-phase method. The unique structure can eliminate the inherent grain boundary impedance of the crystalline material, provide isotropic and continuous three-dimensional transmission channels for sodium ions, significantly reduce the diffusion barrier, and realize ultra-high ionic conductivity far exceeding that of the same-component crystalline material. Meanwhile, the application realizes multi-element synergistic doping by adopting the IV / V main group element M to partially replace the position of phosphorus elements and co-substitute the cations fixedly doped with tungsten elements, so that the lattice can be stabilized, stress can be released, the sodium ion diffusion barrier can be reduced, and the synergistic improvement of high air stability, high structural stability and high ionic conductivity can be realized.

This invention discloses an anti-aging composition and its application in skincare products. The composition comprises lentil seed extract and β-nicotinamide mononucleotide; the anti-aging composition is prepared by a two-step process: aerobic fermentation with *Aspergillus oryzae* followed by anaerobic fermentation with *Bifidobacterium*. This invention achieves synergistic anti-aging effects by significantly inhibiting matrix metalloproteinase activity and promoting type I collagen synthesis through a multi-pathway synergistic effect of "anti-inflammatory, anti-oxidative, repair-energy-supply." The composition has high bioavailability, is mild and safe, and its preparation process is green and stable, making it suitable for skincare products such as creams and serums.