15results about How to "Craft green" patented technology

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 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.

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 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.

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 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 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.

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.