96 results about "Supercritical fluid extraction" patented technology

The invention discloses a method for preparing ultra-high-purity quartz by multi-stage synergistic purification of quartz ore, and belongs to the technical field of ultra-high-purity quartz preparation. According to the method, natural quartz ore is used as a raw material, mineral impurities, lattice impurities and inclusions in quartz are deeply removed through multi-stage synergistic processes such as low-temperature plasma activation, biological leaching, supercritical CO2-assisted acid leaching, microwave-assisted chloridizing roasting and pulsed electric field enhanced acid leaching, and finally a high-purity quartz product with the SiO2 purity larger than or equal to 99.998% (4N8 grade) is obtained. According to the invention, a low-temperature plasma activation technology, microbial metallurgy, supercritical fluid extraction and a pulsed electric field strengthening technology are organically combined, so that the energy efficiency bottleneck and environmental protection limitation of a traditional high-purity quartz preparation process are broken through; the obtained quartz sand product can reach the standards of high-purity quartz sand for semiconductor quartz glass and high-purity quartz sand for photovoltaic quartz crucibles.

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 relates to an ultra-clean high-purity polyethylene purification process based on supercritical fluid extraction, which is characterized in that supercritical CO2 containing an entrainer is used as a medium to wash polyethylene powder, and the entrainer comprises the following components: an acid solution, an alcohol solvent and a chelating agent. Compared with the prior art, the method has the advantages that the polyethylene powder is purified on the basis of the supercritical CO2 containing the entrainer, residual organic impurities in polyethylene can be deeply removed, meanwhile, the acid solution, the alcohol solvent, the chelating agent and the like are used as the entrainer, metal and other impurities which are difficult to dissolve in the supercritical CO2 are converted into soluble components, and the purity of the polyethylene powder is improved. And the polyethylene is separated from the polyethylene powder, so that deep purification of the polyethylene is realized.

The invention discloses a regenerated slurry preparation method based on recycled ceramic casting membranes, and belongs to the technical field of ceramic slurry preparation, and the method comprises the following steps: S1, pretreatment, fine crushing and deep extraction, and supercritical CO2 fluid extraction after crushing treatment; s2, thermal degreasing and activation: step-by-step temperature control removal and surface modification step-by-step heating thermal degreasing: in the first stage, the temperature is 150-250 DEG C, and heat preservation is performed for 1-2 hours; in the second stage, the temperature is 300-400 DEG C, and heat preservation is conducted for 0.5 h; s3, a plasma surface activation process: putting the ceramic powder into low-temperature plasma treatment equipment, introducing a mixed gas of argon and oxygen as a working gas, and treating under the action of specific radio frequency or microwave power; s4, slurry reconstruction, precise formula and optimized dispersion gradient powder mixing, wherein regenerated ceramic powder and new ceramic powder are mixed; and constructing a dispersion system: adding a solvent and a composite dispersant, and carrying out dispersion ball milling.

The invention relates to the technical field of daily chemical and skin external preparations, in particular to a six-dimensional synergistic effect-based acne removal and repair composition, which is prepared from the following active ingredients in parts by weight: 1 to 10 parts of sturgeon caviar extract, 0.1 to 10 parts of chlorogenic acid, 0.1 to 20 parts of 4-tert-butyl cyclohexanol and 0.1 to 20 parts of willow extract. The sturgeon caviar extract is prepared by supercritical CO2 fluid extraction, the willow extract is treated by a synthase process, the content of salicin is not less than 1.5 wt%, and at least one active component in the composition is subjected to supramolecular inclusion modification; the preparation method comprises the following steps: sequentially preparing the extracts and components, sequentially mixing, and finally carrying out an inclusion reaction. The composition constructs a full-link acne removal and skin health maintenance system through a six-dimensional synergistic effect of bacteriostasis, oil control, anti-inflammation, allergy relief, cutin dredging and repairing, has the characteristics of efficient acne removal, mildness, safety and low recurrence rate, is suitable for various skin types such as sensitive acne skin, and can be widely applied to acne removal products of various dosage forms.

The invention discloses a composition for growing and nourishing hair as well as a preparation method and application thereof. The composition is prepared from various components including 20 to 30 parts of cacumen biotae extract, 2 to 7 parts of eclipta prostrata extract, 3 to 9 parts of specnuezhenide and the like. The preparation method comprises the steps of raw material pretreatment, active ingredient extraction, compound blending, microcapsule embedding and preparation forming, the cacumen biotae is subjected to a supercritical extraction process, and the eclipta prostrata is subjected to an ultrasonic-assisted enzymolysis-subcritical water extraction combined process. Experiments show that the composition can significantly increase the hair growth rate, maintain the hair follicle growth period, increase the diameter of a hair bulb part, effectively improve hair follicle health through the synergistic effects of activating hair follicle stem cells, inhibiting apoptosis and the like, and can be applied to preparation of hair care products for promoting hair growth.

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 relates to the technical field of traditional Chinese medicine pharmacy, and discloses a preparation method of a traditional Chinese medicine external preparation for arthralgia based on blood circulation promoting and blood stasis removing, which comprises the following steps: extracting ferulic acid from angelica sinensis and ligusticum wallichii by adopting a supercritical CO2 fluid extraction process; extracting safflower, frankincense and other medicinal materials to obtain a synergistic active ingredient extract; the ferulic acid is used as a first hydrogen bond donor to react with lauric acid used as a temperature-sensitive phase change hydrogen bond donor and choline chloride used as a hydrogen bond acceptor, and the temperature-sensitive bioactive ternary eutectic solvent is prepared; loading the synergistic active ingredient extract in the solvent at low temperature to form a medicine mother solution; and finally, mixing the medicine mother liquor with auxiliary materials to prepare the external preparation. Ferulic acid in medicinal materials serves as a structural unit of a functional solvent, the solvent prepared under the mild condition has biological activity and temperature-sensitive phase change characteristics, a medicine storage cavern can be formed on the skin surface in situ, long-acting slow release and efficient transdermal absorption of active ingredients are achieved, and the curative effect and safety of a preparation are improved.

This invention provides a washing system and method for calcium fluoride granules produced through nucleation granulation, comprising a plasma surface activation module, a supercritical fluid extraction washing module, and an intelligent control and circulation module connected in sequence. The plasma surface activation module is used to perform surface modification and impurity weakening treatment on pre-dried calcium fluoride granules. The supercritical fluid extraction purification module is used to deeply remove impurities from the surface and pores of the granules under anhydrous conditions. The intelligent control and circulation module is signal-connected to the aforementioned modules and is used to dynamically regulate the entire purification process based on online monitoring data. The plasma surface activation module includes a vibrating fluidized bed with a reaction chamber, solving the problem of incomplete removal of stubborn surface impurities by traditional water washing. Ultimately, the surface impurity removal rate of the calcium fluoride granules is stabilized at over 95%, and the product purity reaches a high standard for resource utilization.

The invention belongs to the technical field of tobacco flavors and fragrances, and particularly relates to preparation and application of a coffee flavor. Comprising the following steps: placing cleaned coffee berries in an aged oak wine barrel, capping and sealing, and fermenting and degumming under low-temperature and low-oxygen conditions to obtain green coffee beans; the method comprises the following steps: baking green coffee beans in a baking oven until the coffee beans are brown or reddish brown and the surfaces of the coffee beans have obvious grease; and grinding the baked coffee beans into uniform powder, and performing low-temperature extraction or supercritical fluid extraction to obtain the coffee essence. According to the technical scheme, the suitability of the coffee essence and cigarette products is optimized, the taste is improved, the irritation is reduced, the scorched bitter feeling of the coffee essence is reduced, the baking fragrance and the sweet fragrance are highlighted, the coffee essence is endowed with unique bouquet through wine barrel fermentation, and the stability and the certainty of an essence formula are improved.

The invention relates to the technical field of traditional Chinese medicine extraction, in particular to a traditional Chinese medicine supercritical fluid extraction device and method. The traditional Chinese medicine supercritical fluid extraction device comprises an extraction tank, a first heat exchanger, a separation tank, a collection box, a second heat exchanger, a gas booster pump, a carbon dioxide storage tank and a disassembly and assembly mechanism. The electromagnetic plate and the sealing plate are tightly connected only by placing the electromagnetic plate in the embedded groove, electrifying the electromagnetic plate to generate magnetism and magnetically attracting the electromagnetic plate, the sliding seat is driven by the driving assembly to slide on the mounting guide rail, the sealing plate is disassembled and assembled at the corresponding through groove, and the height of the connecting arm is adjusted through the lifting arm. By means of the structure, when the traditional Chinese medicinal materials on the partition plate located at the high position of the extraction tank need to be fed and discharged, operation is more convenient.

The application belongs to the technical field of natural product extraction, and provides high-purity curcumin powder and an extraction method thereof. The extraction method of the high-purity curcumin powder comprises the following steps: (1) fresh turmeric is sliced, dried, and then crushed, supercritical CO2 extraction is adopted, and curcumin oil, curcumin powder, and residues are separated; (2) the residues are subjected to fermentation-type ethanol extraction to obtain an alcohol extract; (3) the curcumin powder and the alcohol extract are combined, subjected to macroporous resin adsorption, eluted with ethanol, and then concentrated to obtain a concentrated solution; and (4) the concentrated solution is recrystallized, washed, dried, and then high-purity curcumin crystals are obtained. The extraction method adopts supercritical CO2 fluid extraction coupled with fermentation-type ethanol extraction, and the technology of gradient cooling recrystallization of ethanol and water after macroporous resin adsorption, and the steps are used and operated in cooperation. The product obtained by using the extraction method has high yield and purity, low production cost, small amount of organic solvent, and is suitable for industrial production.

The invention relates to the technical field of injection molding material synthesis, and discloses a low-odor automotive polypropylene composite material and a preparation method thereof, and the preparation method comprises the following steps: S1) preparing raw materials according to a formula, and uniformly mixing to prepare a premix; s2) adding the premix into a twin-screw extruder, and injecting supercritical CO2 fluid into a melting section of the twin-screw extruder which is provided with a two-stage vacuum pump and a condensation separation device; and S3) extruding, pelletizing and devolatilizing to obtain the low-odor automotive polypropylene composite material. The polypropylene resin and the POE resin are respectively subjected to adsorption pretreatment by the activated carbon felts, and the activated carbon felts are used for adsorbing volatile organic compounds of the resin materials; the lamellar structure of the talcum powder is relatively complete, the purity is high, the impurity content is low, and the existence of metal oxides is reduced; volatile organic compounds are extracted by supercritical CO2 fluid and migrated, and then the volatile organic compounds are removed by a vacuum pump, so that the odor grade of the polypropylene composite material can be reduced.

The invention relates to the technical field of oral thick paste preparation processes, in particular to an oral thick paste with an asthenopia relieving effect, the oral thick paste raw materials comprise core raw materials, the core raw materials comprise, by weight, 3-8 parts of chrysanthemum, 0.5-3 parts of dendrobium officinale, 3-8 parts of Chinese wolfberry, 3-8 parts of poria cocos, 3-8 parts of black sesame and 1-3 parts of prebiotics; the decoction process of the oral thick paste sequentially comprises the steps of pretreatment, extraction, concentration and paste collection, a step-by-step extraction mode or an enzymolysis-assisted extraction mode is adopted in the extraction step, or a mode of combining supercritical fluid extraction with water extraction is adopted in the concentration step, a gradient concentration mode and a microwave-assisted concentration mode are adopted in the concentration step, and an ultrasonic-assisted paste collection mode is adopted in the paste collection step. The eye protection effect is more comprehensive, prebiotics, blueberries, mulberries and the like are further introduced, and medicinal and edible components such as codonopsis pilosula, lily and the like are further introduced in the scheme and have a synergistic effect with other raw materials, so that a multi-target eye protection system for regulating intestinal tracts and nourishing eyes is constructed.

The present invention relates to a dispersion comprising acellular dermal matrix microparticles, a filler comprising the same, and uses thereof. More specifically, the present invention relates to a filler comprising a dispersion containing acellular dermal matrix microparticles obtained by supercritical fluid extraction and high pressure dispersion operations, and a method for preparing the same. The acellular dermal filler according to the present invention has excellent biological stability and biocompatibility, and extracellular matrix components such as collagen and elastin are significantly preserved therein. In addition, the filling agent also shows excellent biochemical stability, the pH value or the collagen content and the elastin content are kept unchanged in the storage process, and the filling agent also shows physical stability and can continuously maintain injectability. Therefore, the acellular dermal filler can be effectively used as an injectable filler for repair or volume expansion of soft tissue and reduction of wrinkles in the field of plastic and regenerative medicine.

The invention relates to the field of food science and engineering, in particular to a supercritical extraction-based agilawood yang-tonifying tea processing method. The method aims at solving the technical problems that an existing supercritical extraction process is difficult to finely regulate and control the extraction process, the yield of target active ingredients is unstable, the quality difference between batches of products is large, the energy consumption is high, and the existing supercritical extraction process is difficult to adapt to large-scale production. According to the method, key parameters such as temperature, pressure, flow and raw material characteristics of an extraction cavity are collected in real time by deploying a multi-source heterogeneous sensor network; preprocessing and feature extraction are carried out on the collected data, and a real-time state feature vector in the extraction process is constructed; according to the method, the extraction efficiency and selectivity of the target active ingredients of the agilawood Yang tonifying tea can be remarkably improved, the high consistency of the quality between batches of products is ensured, the energy consumption and the production cost are reduced, intelligent adjustment can be performed according to the difference of raw materials, and the product quality and the market competitiveness are effectively improved.

The application discloses a preparation process of Baiyu ointment and relates to the technical field of medicines. The Baiyu ointment prescription is composed of Radix Bupleuri, Rhizoma Polygonati, Ligusticum sinense, Polygonum hydropiper, Geranium wilfordii, Salvia miltiorrhiza, Arnebia euchroma, Angelica sinensis and Zingiber officinale. The preparation process comprises the following steps: taking medicinal materials; supercritical fluid extraction; ultrasonic extraction; and preparation forming. The original preparation process of the Baiyu ointment is improved and optimized by adopting the modern preparation process and combining with a large number of investigation experiments. The Baiyu ointment has the advantages of high content of effective components, reduced types of auxiliary materials and optimized dosage of the auxiliary materials. The Baiyu ointment has important significance for improving the medicine quality and enhancing the medicine safety, effectiveness and quality controllability.

The invention relates to the field of CC composite materials, and discloses a high-strength CC composite material preparation process which comprises the following steps: step 1, heating a reaction container to melt asphalt; 2, introducing a gas medium into the reaction container to increase the internal pressure of the reaction container; enabling the gas medium to be in a supercritical state; step 3, introducing a gas medium into the reaction container, and oscillating the molten asphalt by using the gas medium; 4, after oscillation is finished, the reaction container is heated to the carbonization temperature, and in-situ carbonization and supercritical fluid extraction are carried out. Carbon dioxide is introduced and is in a supercritical state, so that the viscosity of the impregnated asphalt is reduced; and meanwhile, the pressure in the reaction container is periodically changed between the peak pressure and the valley pressure to generate a physical pumping effect, so that the low-viscosity molten asphalt can be forcibly pressed into tiny pores of the carbon fiber preform, and residual gas in the pores can be discharged.

This invention provides an extract of Platycladus orientalis leaves, its preparation method, and its application. Specifically, the Platycladus orientalis leaf extract composition uses Platycladus orientalis leaves as raw material. First, extract 1 is obtained by supercritical fluid extraction. Then, the residue is collected and refluxed to obtain extract 2. Extracts 1 and 2 are combined in a specific ratio to obtain the Platycladus orientalis leaf extract composition. The composition has a synergistic effect and a significant anti-hair loss effect.

The application relates to a supercritical extraction separation device, and belongs to the technical field of supercritical extraction. In order to solve the problem that a large amount of liquid is still adhered to the solid material interlayer, and plant residues are still present after the plant is crushed, the inside of the plant residues is locked with a certain amount of moisture, and the ordinary filter is difficult to separate the moisture from the plant residues, the plant residue particles are intercepted through the filter screen frame, the staff collects the filtered liquid material for the next process, the grinding panel is used in cooperation with the filter screen frame, the extraction purity of the liquid material in the solid-liquid mixture is improved, the moisture locked in the plant residue fragments is released to a certain extent, the material flows into the lower flow cavity along the discharging edge leakage groove, and then flows into the flow column box along the reserved communication pipe, and thus the extraction intensity of the moisture in the plant residue fragments is increased.

This invention discloses a gradient pressure reactor for purifying quartz sand using supercritical fluid extraction. It includes a high-pressure cylinder, a medium-pressure cylinder, and a low-pressure cylinder separated along the axial direction, as well as a supercritical fluid injection system, a gradient pressure control system, and a control box. Heating jackets are installed on the outer walls of the high-pressure, medium-pressure, and low-pressure cylinders. A feed pipe is installed on the high-pressure cylinder, and a discharge pipe is installed at the bottom of the low-pressure cylinder. On / off valves are installed between adjacent feed pipes, high-pressure cylinders, medium-pressure cylinders, low-pressure cylinders, and discharge pipes. The gradient pressure control system includes a booster pump for the high-pressure cylinder, a pressure regulating valve for the medium-pressure cylinder, and a back pressure valve for the low-pressure cylinder. This invention utilizes a high-pressure cylinder for dissolving metallic impurities, a medium-pressure cylinder for removing organic matter, and a low-pressure cylinder for fluid-sand particle separation, thus achieving targeted impurity removal with high efficiency. Furthermore, the supercritical fluid diffuses more fully under different pressure environments, which is beneficial for improving fluid utilization.

The application provides a supercritical extraction process of 2-cyanopyridine, and the specific process steps comprise ammonia oxidation of 2-methylpyridine, supercritical extraction, and separation and purification. The extraction process can effectively solve the problems of general separation efficiency, poor product quality, and low yield in the current mainstream 2-cyanopyridine preparation process. The extraction process of the application avoids the use of sulfuric acid, and the production process is more environmentally friendly. The hydrolysis of 2-cyanopyridine is inhibited, the product yield is improved, the yield of 2-cyanopyridine reaches 88%, only a small amount of solvent material is left in the supercritical extraction extract, and the product quality is higher. The supercritical extraction achieves the purpose of extraction by changing the pressure and temperature, and the process is simple and the extraction speed is fast.

A solvent-free supercritical fluid extraction system is characterized by comprising: a pretreatment unit having a cleaning device for cleaning a wolfberry raw material; the supercritical fluid extraction unit is connected with the cleaning device and comprises a fluid storage tank for storing an extracting agent; the supercritical extraction reaction tank permeates, dissolves and extracts nutritional ingredients of a medlar raw material such as medlar seeds, medlar fruits or a combination of the medlar seeds and the medlar fruits through supercritical fluid so as to obtain a primary extract; the temperature adjusting device is connected with the supercritical extraction reaction tank and is used for maintaining the temperature of the supercritical fluid; the pressure adjusting device is connected with the supercritical extraction reaction tank and is used for providing and maintaining the pressure of the supercritical fluid; the separating device is connected with the supercritical super-extraction reaction tank and is used for separating the primary extract; comprising a first circulating pump and a second circulating pump, the first circulating pump is used for returning the supercritical fluid to the supercritical fluid extraction unit, and the second circulating pump is used for returning residues to the supercritical fluid extraction unit.

This application relates to the field of camellia seed extraction technology, specifically disclosing a method for separating high-value components from camellia seeds based on supercritical fluid extraction and percolation extraction. It constructs an integrated high-value separation route using camellia seeds as a unified raw material, proceeding from oil extraction to saponification. First, supercritical carbon dioxide is used for green selective extraction of camellia seed powder, followed by gradient vacuum separation to obtain crude camellia seed oil. Simultaneously, defatted camellia seed meal with low residual oil and high porosity is produced. Then, the defatted camellia seed meal is subjected to wet column packing and constant-rate percolation extraction using an ethanol-water solution. This is combined with subsequent concentration, decolorization, and recrystallization to obtain tea saponins. This method, by coupling efficient defatting in the front stage with saponification and purification in the back stage, solves the problems of non-green camellia seed oil extraction, high residual oil and dense structure of the camellia seed meal, hindered mass transfer of tea saponins leading to low extraction efficiency, complex purification processes, and insufficient comprehensive utilization of camellia seeds in existing technologies.

The invention relates to the technical field of fish oil preparation, in particular to a method for removing fishy smell from sea bass oil, which comprises the following steps: S1, supercritical fluid extraction pretreatment: putting sea bass oil into a supercritical fluid extraction device, and carrying out supercritical fluid extraction to remove part of fishy substances and impurities in fish oil; s2, primary separation: performing primary separation on the mixture extracted in the step S1; s3, secondary separation: performing secondary separation on the fish oil subjected to primary separation; s4, adsorption and fishy smell removal: enabling the fish oil subjected to secondary separation to pass through an adsorption column filled with a composite adsorbent; s5, molecular distillation purification: carrying out molecular distillation on the adsorbed fish oil; and S6, secondary adsorption under the protection of inert gas: in the fish oil subjected to molecular distillation, under the protection of inert gas, carrying out secondary adsorption again through the adsorption column filled with the composite adsorbent. The technical problem that the fishy smell of sea bass oil cannot be efficiently and greatly removed by the existing fishy smell removal process method is solved.

A method and processing technology for preparing baked products from raw materials is disclosed. The method includes at least one baking or roasting step in which the raw materials are processed in the absence of atmospheric air, achieved through a vacuum, vacuum-compensated, or pressure—the latter two employing an inert atmosphere. A sealed rotary roasting drum (or processing compartment) is supplied with pre-heated inert gas while heating and rotating the raw materials, and the inert gas is optionally recycled for reuse. Additional unit operations such as milling, cooling, spraying, extraction, and storage are also performed in the absence of atmospheric air, to preserve product quality and prevent oxidation. Optional steps include cryogenic pre-milling, sweetener addition to generating a “torrefacto” effect, and supercritical fluid extraction of oils for later incorporation into the baked products. The disclosed technology enables continuous production of baked products with improved aroma, stability, and self-life, by maintaining an oxygen-free environment throughout processing.

The invention discloses medicinal and edible dandelion powder, dandelion milk tea and a preparation method thereof, and relates to the technical field of food processing. The preparation method of the dandelion powder comprises the following steps: S1, performing supercritical CO2 fluid extraction on fine dandelion powder, and performing depressurization separation to obtain an extract and medicine residues; s2, deionized water is added into the medicine residues, a medicine residue solution is obtained, composite hydrolase is added for enzymolysis, and an extracting solution is obtained; s3, dissolving the extract with an ethanol solution to obtain an extract liquid, then mixing with the extract liquid, performing vacuum rotary evaporation, and eluting with macroporous resin to obtain an eluent; s4, carrying out vacuum concentration on the eluent, and sequentially carrying out ceramic membrane cross-flow filtration and nanofiltration membrane concentration, so as to obtain trapped fluid; and S5, drying and crushing to obtain the dandelion powder. The preparation process is simple, low in energy consumption, high in total extraction rate and low in solvent residue, the prepared dandelion powder is good in solubility and stability, the content of effective components is high, and the bioaccessibility of flavone is remarkably improved.

A clovershrub zanthoxylum bungeanum peel extraction method belongs to the field of clovershrub zanthoxylum bungeanum peel extraction, and comprises the following steps: 1, washing freshly picked clovershrub zanthoxylum bungeanum, and airing; step 2, drying the Dahongpao pepper cleaned and aired in the step 1; step 3, performing peel and seed separation on the dried Dahongpao pepper; 4, crushing the clovershrub peel obtained in the step 3, and extracting the clovershrub peel through a carbon dioxide supercritical fluid extraction method; 5, after extraction is completed, substances obtained in the step 4 are dissolved, and recrystallization operation is conducted; and 6, after recrystallization is completed, filtering, drying and crushing to obtain the Zanthoxylum bungeanum Maxim peel extract. According to the invention, the zanthoxylum clovershrub peel extracted essential oil obtained by carbon dioxide supercritical fluid extraction is purified by a recrystallization method to obtain a crystalline solid, so that the zanthoxylum clovershrub peel extract is convenient to store and transport while the impurity content is reduced.

The invention discloses a preparation method of herba epimedii essential oil, and belongs to the technical field of plant extraction. The preparation method comprises the following steps: firstly, pre-treating epimedium leaves, namely selecting, cleaning, drying, crushing and sieving to obtain epimedium leaf powder; then performing efficient extraction under specific pressure, temperature and time by adopting a supercritical CO2 fluid extraction technology to obtain an epimedium oil crude product; and finally, dissolving the crude product with an organic solvent, drying with a dehydrating agent, filtering, and removing the solvent to obtain the pure herba epimedii essential oil. A supercritical extraction process is adopted, conditions are mild, heat-sensitive components and natural flavor can be reserved to the maximum extent, and activity loss caused by traditional high-temperature extraction is avoided; the obtained essential oil is complex and harmonious in component and rich in characteristic terpene and alcohol compounds, so that the essential oil has excellent antioxidant biological activity while keeping unique medicine fragrance and wood fragrance. The method is simple in step, good in repeatability and environment-friendly, and provides a reliable way for high-quality, standardized and industrial production of the herba epimedii essential oil.

The application discloses an environment-friendly perfume composition and a preparation method thereof. The composition is prepared from natural herb extracts and citrus-based natural essential oils by using a supercritical fluid extraction process. The fragrance components are derived from natural herb extracts of lavender, rosemary and mint, and orange and lemon grass essential oils. In order to ensure stability, natural emulsifiers, natural polysaccharide thickeners represented by plant lecithin, natural moisturizers and antioxidants are added in the formula, so as to further improve the storage stability of the product. The air freshener prepared by using the application not only has excellent fragrance effect and durability, but also is safe for human body and environment, and is a truly environment-friendly product.