322 results about "Tannin" patented technology

The present invention belongs to the technical field of biomass resource utilization and microbial fertilizers, and specifically relates to a fertilizer based on oil-tea camellia cattail, a preparation method and its application. The fertilizer described in the present invention is prepared by a collaborative fermentation process of Aspergillus niger, Phanerochaete chrysosporium and Bacillus subtilis. The obtained fermentation product is separated into solid and liquid to obtain a solid, the solid being a solid fertilizer, and the liquid being a foliar fertilizer after post-treatment. Both can be used for the cultivation of crops such as tangerines and oil-tea camellias. Based on the microbial collaborative fermentation process, the content of anti-nutritional factors tannin and tea saponin in the obtained solid fertilizer is significantly reduced, which is less than 1.8 g / kg and 0.1% respectively on a dry basis, while maintaining a seed germination index higher than 95%. According to a planting comparative test, the average yield per mu of oil-tea camellias using the solid fertilizer and liquid fertilizer obtained in this application increased by 12%. The average yield per mu of tangerines increased by about 11%, and the sugar, vitamin C, and trace element contents in tangerines were higher than those using traditional fertilizers.

The present invention relates to a pet sterilizer and deodorizer, which belongs to the technical field of pet deodorization. The present invention promotes the long-term expression of hop extract and enhances the sterilization and deodorization effect through the synergistic effect of hop extract, persimmon tannin, and lysozyme. Furthermore, the composition is stable, natural, and pollution-free, and can be used in the oral cavity and in vitro of animals. The present invention also provides zinc ricinoleate and an antibacterial agent. Through the three-phase interaction of zinc ricinoleate, hop extract, and antibacterial agent, the overall stability is enhanced and the antibacterial time of the complex is prolonged while ensuring antibacterial and deodorizing effects. The present invention also provides a modified quaternary ammonium salt antibacterial liquid. The modified quaternary ammonium salt has enhanced stability and, when present together with zinc ricinoleate, promotes an enhanced deodorizing effect. The present invention also provides an Artemisia annua extract, a Gentiana root extract, and an Artemisia argyi extract, which can eliminate odor sources and significantly inhibit bacterial growth, thereby having significant antibacterial, deodorizing, and odor-removing effects.

The utility model discloses an ice persimmon closed-loop heat pump dryer which comprises a drying chamber and a heat exchange system, and the drying chamber is provided with an air valve and a fan; the heat exchange system comprises a compressor, a condenser set, an electronic expansion valve and an evaporator which are sequentially connected and form a refrigerant circulation loop. The drying chamber has a high-temperature mode and a low-temperature mode, when the drying chamber is in the high-temperature mode, the air valve is closed, and when the drying chamber is in the low-temperature mode, the air valve is opened. Due to the indoor condenser and the outdoor condenser, the drying chamber can be flexibly switched between a high-temperature mode and a low-temperature mode, and the alternate operation mode not only can quickly and uniformly remove moisture in the persimmons, but also effectively reduces the tannin content in the persimmons. An air valve is arranged in the drying chamber and can change the flow direction of air in the drying chamber according to the working mode. Air flows through the heat regenerator twice and is heated / cooled, and the humidity is rapidly reduced in the process.

The invention belongs to the technical field of radioactive wastewater treatment and uranium extraction from seawater, and discloses a high-flux cellulose immobilized tannin membrane adsorption material as well as a preparation method and application thereof. The membrane adsorption material comprises an aldehyde cellulose acetate microfiltration membrane and waxberry tannin which is cured on the microfiltration membrane through gradient cross-linking. The membrane adsorption material provided by the invention keeps a reticular porous structure of a cellulose microporous filter membrane and has the characteristics of high flux and rapid mass transfer, the pure water flux of a single-layer membrane can reach 300 L / (m.h), the treatment capacity of a multi-layer membrane is remarkably increased, large-flow treatment can be realized, and the efficiency of extracting uranium from seawater or uranium-containing wastewater is remarkably improved.

The invention discloses a Chinese gall leaven preparation method based on constant-temperature fermentation, and relates to the technical field of Chinese gall leaven preparation. The preparation method comprises the following steps: respectively and independently cleaning gallnut, distiller's yeast of white spirit and tea water, and removing non-medicinal parts, mildewed medicinal materials and impurities; the method comprises the following steps: uniformly mixing gallnut powder, distiller's yeast of Baijiu and tea leaves according to a mass ratio of (10-15): (0.5-1): (2-4), adjusting the moisture content to 40-45%, and spreading the mixture in a material tray; according to the method, constant-temperature fermentation equipment is introduced, so that the temperature in the fermentation process is always kept within the range of 26 + / -5 DEG C for 60-72 hours, and drying, crushing and briquetting are performed. Compared with the traditional natural fermentation process, the constant-temperature fermentation has the advantages that the tannin biotransformation efficiency is remarkably improved, the tannin content is greatly reduced, the gallic acid content is greatly improved, the curative effect is greatly improved, the sour and astringent taste of the product is remarkably improved, the fermentation time is greatly shortened, the production efficiency is improved, and the energy cost is reduced.

The invention discloses a method for improving the quality of a Tieguanyin tea extracting solution through segmented composite enzymolysis extraction, and belongs to the technical field of tea drink preparation. The method comprises the following steps: S1, performing low-temperature aroma extraction on Tieguanyin dry tea, and performing crushing so as to obtain crushed tea; s2, adding water and beta-glucosidase into the broken tea to carry out first-stage enzymolysis extraction, and separating to obtain tea aroma extract liquid and aroma-free tea residues; s3, water and composite hydrolase are added into the aroma-free tea residues for second-stage enzymolysis extraction, separation and filtration are performed, and a hydrolysis extraction solution is obtained; and S4, mixing the tea fragrance extract liquid with the hydrolysis extract liquid, cooling, centrifuging and filtering to obtain the Tieguanyin tea extract liquid. According to the method disclosed by the invention, the original flavor of the Tieguanyin is maintained, meanwhile, the fragrance and the mouth feel are remarkably improved, and the problems of fragrance loss and bitter taste caused by traditional high-temperature long-time extraction and cooked soup taste generated by tannase enzymolysis are avoided.

The invention relates to a salt-resistant biomass interface evaporation material as well as a preparation method and application thereof, and relates to the technical field of interface evaporation materials. The preparation method comprises the following steps: mixing sunflower fiber dispersion liquid, polyvinyl alcohol and carbon-containing molybdenum disulfide, then adding glutaraldehyde, then carrying out liquid nitrogen freezing and freeze drying, sequentially soaking with a tannic acid solution, a calcium chloride solution and a ferric chloride solution, and then carrying out freeze drying. Natural sunflower fibers are used as a main framework, cotton is used as a supporting material, carbon-containing MoS2 is prepared and crosslinked with polyvinyl alcohol, a hydrophilic functional layer is constructed on the surface of the material through tannic acid, and the tannic acid is coordinated and complexed with Ca and Fe < + >, so that a more stable hydrophilic complexed coating is formed on the surface of the material; the surface wettability and the water conveying capacity of the material are further improved, meanwhile, salt crystal deposition and precipitation in the seawater evaporation process are effectively inhibited, and the oxidation resistance and the seawater corrosion resistance of the material are improved.

The invention relates to the technical field of biological medicine, in particular to anti-acne hydrogel and a preparation method thereof. The anti-acne hydrogel is prepared from metal-polyphenol network nanoparticles and a hydrogel base material, the metal-polyphenol network nanoparticles comprise a first polyphenol compound, a second polyphenol compound and metal ions, the first polyphenol compound is a tannic acid compound, and the second polyphenol compound is a flavonoid compound; the hydrogel base material comprises a hydrophilic high-molecular polymer and a cationic polymer. The metal-polyphenol network nano-particles are creatively utilized, the anti-inflammatory and anti-oxidation activity of flavonoid compounds, the convergence and protein binding characteristic of tannin and the antibacterial activity of metal ions are integrated at the same time, and the vicious circle of acne can be intervened at the same time from multiple links of antibacterial, anti-inflammatory, anti-oxidation and keratinization adjustment; and the defect of single action target spot of the existing medicine is overcome.

The invention relates to an instant composition with a long-acting oral health-care function for dogs and cats as well as a preparation method and application of the instant composition, and belongs to the technical field of pet food and pet oral care. The composition comprises 20%-30% of whey protein powder, 10%-20% of hydrolyzed gelatin, 1%-3% of low-molecular-weight chitin saccharide gum, 1%-2% of modified cassava starch, 2%-5% of sodium alginate, 1%-3% of fructo-oligosaccharide, 0.03%-0.08% of lysozyme, 0.03%-0.08% of tea polyphenol, 0.05%-0.15% of zinc gluconate, 0.05%-0.1% of persimmon tannin, 3%-5% of tuna hydrolysate, 4%-6% of whole goat milk powder, 2%-4% of skim yoghurt powder and the balance water. The added active ingredients have long-acting slow-release and continuous effects in the formula, oral pathogenic bacteria can be effectively inhibited, dental plaque and dental calculus formation can be reduced, halitosis can be lastingly relieved, and the toothpaste has good market competitiveness.

The invention discloses a galiaceae-euphorbia tripsacus compound extract as well as a preparation method and vagina repair application thereof. The compound extract is prepared from galiaceae herbs and euphorbia tripsacus according to a scientific ratio through compound enzymolysis pretreatment, gradient ethanol solvent step-by-step extraction and double-resin series purification. According to the preparation method, the dissolution rate of the active components is remarkably increased by utilizing an enzymolysis wall breaking technology, the problem that the purity of the multi-polar components (tannin, flavone and polysaccharide) is difficult to increase and extract at the same time is solved through gradient extraction and series purification, and the purity of the total active components is more than or equal to 60%. The obtained composite extract has multiple effects of astringing and tightening, promoting regeneration of elastic fibers and improving contractility of smooth muscles, and is safe and non-irritant. The invention further discloses targeted sustained-release gel containing the extract, and the targeted sustained-release gel can be used for improving vaginal relaxation and deeply repairing private parts.

The invention discloses an arsenic-containing copper-zinc polymetallic ore beneficiation method and an arsenic-containing mineral inhibitor, and belongs to the field of beneficiation. The arsenic-containing mineral inhibitor comprises the following components by mass percent: 40-60% of lime; 30%-40% of ferrous cyanide salt; and 10%-20% of a sulfomethylation modified tannin extract. The sulfomethylation modified tannin extract is prepared from the following raw materials in percentage by mass: 40-60% of tannin extract; 10-20% of sodium hydroxide; 15 to 25% of formaldehyde; and 5-15% of sulfuric acid. According to the method, the lime, the ferrocyanide and the sulfomethylation modified tannin extract are innovatively compounded according to a specific proportion and are in mutual synergistic interaction, the selectivity of arsenic mineral inhibition can be effectively improved, the agent dosage is reduced, the long-term effect of inhibition is enhanced, deep arsenic reduction can be achieved in the mineral separation process, and the concentrate quality and the recovery rate are improved.

The invention discloses a method for preparing a polyvinyl alcohol flame-retardant film by using walnut green seedcase carbon dots and application of the polyvinyl alcohol flame-retardant film, and belongs to the technical field of composite materials. The preparation method of the flame-retardant film comprises the following steps: mixing a walnut green seedcase carbon dot solution with polyvinyl alcohol, carrying out oil bath heating treatment, cooling to room temperature, carrying out film forming on the obtained walnut green seedcase carbon dot-polyvinyl alcohol mixed solution in a casting manner, and finally, carrying out drying treatment to obtain the target flame-retardant film. According to the method, the walnut green seedcase is used as a raw material to prepare the carbon dots, hydrolytic tannin and quercetin components contained in the walnut green seedcase are fully utilized, resource recycling of waste is achieved, and the production cost of the flame-retardant film is remarkably reduced. The prepared flame-retardant film has the characteristics of portability and certain mechanical strength, is suitable for various scenes with requirements on light flame-retardant materials, has an excellent flame-retardant effect, can effectively delay or even block flame diffusion, and greatly improves the use safety of the materials.

The invention discloses a method for extracting an anti-aging component camellia saponin A from camellia on the basis of a full-bionic targeted extraction technology and application of the anti-aging component camellia saponin A. Efficient enrichment and structure protection of the camellia saponin A are achieved by simulating the whole process of decomposition and absorption of the oral cavity, the stomach and the intestinal tract of a human body. Specifically, the camellia flowers or leaves are pretreated through supercritical extraction, lipid and gel impurities which are contained in the camellia flowers or leaves and are prone to forming gelatinoids are removed, and convenience is provided for subsequent purification; the problems that the camellia saponin A is low in yield and easy to degrade are solved by applying a full-bionic enzymolysis technology, and meanwhile, impurities such as lipid, protein, tannin and sugar can be degraded through full-bionic extraction, so that convenience is provided for subsequent crystallization; and purifying by adopting a macroporous resin adsorption technology, and finally purifying by crystallization. The camellia saponin A obtained by the invention can better achieve the effects of improving wrinkles, repairing skin, brightening skin color and delaying senescence through multi-way and multi-azimuth anti-wrinkle, repairing and whitening effects, and can be widely applied to various types of cosmetics.

The present disclosure provides compositions and methods for producing condensed tannins in maize. The present disclosure further provides maize plants, seeds, cells, and plant parts comprising increased catechin based proanthocyanidins or increased condensed tannins. Aspects of the disclosure further relate to methods for producing, growing, and breeding modified maize plants.

The invention discloses a tenuilia microspora NB1-3, a leavening agent and application of the tenuilia microspora NB1-3 in preparation of caragana microspora and moringa oleifera fermented protein feed. The strain is classified and named as nicotiana microspora, and is preserved in the China Center for Type Culture Collection (CCTCC), and the preservation number is CCTCC NO: M 20251872. The core of the method is that crude fibers and antinutritional factors (tannin and phytic acid) in moringa oleifera and caragana microspora are efficiently degraded by utilizing a strong lignocellulose degrading enzyme system of the tenuilia microspora NB1-3, and meanwhile, the crude protein content of the feed is increased. The prepared fermented protein feed is high in crude protein content and low in crude fiber content and meets the protein feed standard, efficient and high-value utilization of woody plant resources such as caragana microphylla and moringa oleifera is achieved, and a new high-quality and economical protein feed source is provided for animal husbandry.

An object of the present invention is to provide a tea beverage having both a tea-like taste and a fruity aroma while containing tannin and catechin at low concentrations, a method for producing the same, and the like.SOLUTION: A tea beverage having a tannin concentration of 330mg / L or less, a caffeine concentration of 80mg / L or less, and a fruity aroma, wherein the tea beverage satisfies at least one of the following conditions (i) and (ii): (i) a roseoxide concentration of 0.0001 to 5ppm; and (ii) a citronellol concentration of 0.0001 to 10ppm.SELECTED DRAWING: None

The present invention relates to tannin-based heat-expandable microspheres, and also to a process for their preparation. The heat-expandable microspheres comprise a thermoplastic shell surrounding a hollow core, wherein the hollow core comprises a blowing agent, and the thermoplastic shell comprises tannin.

The subject of the invention is a particulate made of particles comprising biochar particles impregnated with a tannin binder. The invention also relates to shaped objects and building materials obtained from a composition comprising an organic polymer and particulates, as well as to methods and uses relating to said particulates.

According to an example aspect of the present invention, there is provided an intumescent fire retardant composition comprising: an acid source comprising or consisting of ammonium phytate; and a carbon source selected from the group consisting of: carbohydrates, chemically modified lignins, tannin, and any combinations and derivatives thereof.

The invention discloses lotus leaf powder as well as a preparation method and application thereof, and belongs to the technical field of deep processing of plant raw materials. The preparation method of the lotus leaf powder provided by the invention comprises the following steps: carrying out enzymolysis on pretreated fresh lotus leaves in a system containing beta-glucosidase, and then carrying out scalding and ice water leaching cooling; the obtained lotus leaf powder has bright emerald green color, and contains more active ingredients such as flavonoid aglycones and nuciferine which are beneficial to human body absorption; moreover, the content of tannin and total flavonoid glycoside in the obtained lotus leaf powder is relatively low, so that the lotus leaf powder has relatively low bitter and astringent taste, and the obtained lotus leaf powder is excellent in mouth feel; meanwhile, the obtained lotus leaf powder also has good capability of improving blood fat; the method can be widely applied to preparation of matcha-flavored food or preparation of functional preparations for improving blood fat.

The present application relates to the technical field of feed processing, and particularly relates to a preparation method of Maotai-flavor distiller's grains fermented feed, which comprises the following steps: drying treatment based on the moisture content of Maotai-flavor distiller's grains to obtain basic distiller's grains; determining the strain ratio of brewer's yeast, bacillus subtilis and aspergillus niger based on the tannin content of the basic distiller's grains to obtain a compound fermentation inoculant; inoculating and then fermenting; determining state evaluation parameters based on the total polyphenol accumulation rate, the dissolved oxygen consumption rate and the microbial activity index during the fermentation process, and performing qualified evaluation, and dynamically adjusting when unqualified; determining the fermentation end point based on the tannin degradation rate and the total polyphenol accumulation rate; and mixing the fermented distiller's grains with the basic feed at a mass ratio of 1% after low-temperature drying of the fermented distiller's grains. The present application realizes three-layer control of raw material evaluation, process control and end point determination, significantly improves the stability and content of functional active ingredients in the product, reduces the tannin and safety risk, and has a good intestinal health improvement effect on animals.

The invention discloses an environment-friendly dyeing process method for paper products, and aims to solve the problems that a traditional environment-friendly dyeing process is large in chromatic aberration fluctuation, unstable in fastness and poor in adaptability of difficult-to-dye paper types. The method comprises the following steps: establishing a paper physical property database based on near infrared spectrum imaging and liquid absorption rate test; calculating an optimal dye liquor concentration gradient, dipping time and temperature through a dye penetration kinetic model and a Bayesian optimization algorithm; gradient permeation dyeing is carried out in the continuous dye vat array by adopting natural vegetable dye; a tannic acid-chitosan composite cross-linking agent is introduced for bio-based color fixation; and closed-loop self-adaptive adjustment is realized by combining hyperspectral imaging online detection and feedback regulation and control. According to the technical scheme, the dye uptake is remarkably increased to 91% or above, the rubbing fastness reaches 4.5 level, the color uniformity and batch consistency are ensured in high-speed continuous production, no heavy metal mordant exists in the whole process, the biodegradability of wastewater is high, and the clean production requirement is met.

This invention discloses a method for reducing carbon and nitrogen emissions and nutrient loss during liquid manure storage. By storing liquid poultry and livestock manure containing plant tannin extracts under natural atmospheric and static conditions, this invention reduces carbon and nitrogen emissions and nutrient loss during storage, increases the fertilizer value of the liquid manure, and improves its physicochemical properties and stability. The plant tannin extracts are natural plant extracts, environmentally friendly and non-toxic, with low cost and simple operation, making them suitable for large-scale application. This invention provides a highly efficient and environmentally friendly liquid manure storage technology for the livestock and poultry farming industry, and offers a sustainable liquid manure management solution.

The invention belongs to the technical field of leather tanning agents, and discloses a light-color polycarboxylic oxidized lignin tanning agent and a preparation method and application thereof. The light-color multi-carboxyl oxidized lignin tanning agent is prepared by carrying out synergistic oxidation reaction on lignin, hydrogen peroxide and ozone in the presence of sodium vinylsulfonate. According to the invention, sodium vinylsulfonate is creatively introduced as an oxidation auxiliary agent, has both surface activity and free radical initiation functions, and forms an efficient synergistic oxidation system with a hydrogen peroxide / ozone system. The system can powerfully break the dense structure of lignin and remarkably promote the benzene ring opening reaction, so that the introduction efficiency of carboxyl is greatly improved. According to the synergistic oxidation system, chromophoric groups of lignin can be effectively destroyed while the lignin is deeply oxidized, deep decolorization and light appearance are achieved, the bottleneck that traditional oxidized lignin is dark in color and difficult to be used for manufacturing light-color or bright-color leather is thoroughly overcome, and the application range of a bio-based tanning agent is greatly expanded.

This invention discloses a method for preparing a heat-clearing and detoxifying oral liquid. Honeysuckle and Scutellaria baicalensis are pulverized and sieved, then enzymatically hydrolyzed with water, ultrasonically extracted, and filtered to obtain extract A. Scrophularia ningpoensis, Rehmannia glutinosa, Forsythia suspensa, Gardenia jasminoides, Viola yedoensis, Gentiana scabra, Isatis indigotica, Anemarrhena asphodeloides, and Ophiopogon japonicus are warm-soaked in water and flash-extracted, then filtered to obtain extract B. Gypsum is crushed, decocted with water, and filtered to obtain extract C. The extracts are combined, concentrated, and sequentially clarified using a flocculant, followed by inorganic ceramic membrane microfiltration and organic ultrafiltration. The clarified liquid is then concentrated, flavoring agents and preservatives are added, the pH is adjusted, the volume is adjusted, filtered, filled, and sterilized to obtain the finished product. This invention utilizes a composite clarification process—low-temperature ultrasonic-enzymatic extraction of honeysuckle and Scutellaria baicalensis, clarification using a flocculant, inorganic ceramic membrane microfiltration, and organic ultrafiltration—to improve the extraction rate of effective components, effectively remove large molecular impurities such as tannins, proteins, and pectin, and significantly improve the clarity and stability of the product.

The invention provides a canarium pimela fermentation process and application of a fermentation product of the canarium pimela fermentation process in wash supplies. The canarium pimela fermentation process comprises the following steps: soaking canarium pimela in hot water at 80-90 DEG C for 5-10 minutes, then removing kernels, and crushing canarium pimela pulp to obtain fruit pulp; ultraviolet rays with the wavelength of 220-260 nm and the intensity of 15-25 mW / cm < 2 > are adopted for carrying out radiation treatment on the fruit pulp, and the radiation treatment time is 40-80 min; performing mixed fermentation on the fruit pulp subjected to radiation treatment and saccharomycetes at the fermentation temperature of 20-25 DEG C for 20-30 days; and enabling the fermented product to pass through a gap of 0.05-0.15 mm under the pressure of 80-150 MPa, so as to obtain the fermented product. According to the fermentation process, a fermentation product with extremely low tannin content and high activity of effective components such as polyphenols, flavonoids and organic acids can be obtained. The fermentation product has good moisturizing and anti-oxidation effects.

The invention relates to flavored fruit vinegar and a preparation method thereof, and the flavored fruit vinegar has the beneficial effects that the coexistence of flavor and nutrition is realized through the matching of apples and roxburgh roses; wherein the apple juice is used as a fermentation substrate, so that stable sugar-acid ratio and mellow feeling are provided; the rosa roxburghii tratt greatly enriches active ingredients such as vitamin C, SOD, polyphenol and the like, and lays a health-care foundation of the product. In the fermentation process, the synergistic effect of saccharomycetes, acetic bacteria and lactic acid bacteria is adopted, the saccharomycetes efficiently complete alcoholic fermentation, the acetic bacteria dominate acid production, the lactic acid bacteria not only can generate soft lactic acid, more importantly, metabolites of the lactic acid bacteria can effectively complex and convert tannin astringency in the roxburgh roses, and the taste is fundamentally improved. The final product successfully integrates the mellowness of the apples and the high nutrition of the roxburgh roses and is free of obvious bitter and astringent taste, and the taste, flavor and nutritional value are comprehensively improved.

The invention relates to the technical field of leather chemical industry and leather manufacturing, in particular to a tannin extract based on metal complex modification and a preparation method and application of the tannin extract based on metal complex modification. 15 to 25 parts of aluminum sulfate; 5-10 parts of lanthanum sulfate / cerium sulfate; 0.5-2 parts of sulfuric acid; 0.5 to 2 parts of citric acid; and 500 to 600 parts of water. The modified tannin extract which is light in color, good in dispersity and excellent in tanning property is prepared through the steps of oxidative degradation, chelating masking, metal synergistic complexing and the like. The method is simple in process, environmentally friendly, efficient and suitable for industrial production, and the problems that a traditional vegetable tanning agent is low in whiteness and poor in light resistance stability when applied to white leather, and traditional metal tanning leather is hard in hand feeling, insufficient in light resistance and the like are effectively solved.

The present invention relates to the use of an animal feed additive composition for controlling the growth of undesirable microorganisms, said composition comprising glycerides, vegetable oils, tannins and / or saponins, the glycerol ester is selected from the group consisting of glycerol monopropionate, glycerol dipropionate and glycerol tripropionate, glycerol monobutyrate, glycerol dibutyrate and glycerol tributyrate, glycerol monovalerate, glycerol divalerate and glycerol trivalerate, and mixtures thereof. The invention also relates to the use of the animal feed additive composition for promoting intestinal growth, alleviating or alleviating effects from necrotizing enteritis, modulating intestinal flora and / or as an additive to drinking water.

The invention belongs to the technical field of wine brewing, relates to a natural sweet wine low-sulfur brewing method for delaying white grapes until the white grapes turn red and then harvesting the white grapes, solves the health hidden danger and flavor defects caused by high-sulfur addition in the traditional sweet white wine process, and remarkably improves the flavor quality of the wine at the same time. According to the method, complete and healthy red (total anthocyanin content is greater than or equal to 5mg / kg) fruits are selected through artificial spike selection and grain selection, and the cardinal number of infectious microbes in raw materials is reduced; no commercial yeast is added, natural slow fermentation is achieved by means of microorganisms, and the finished product is good in flavor and quality; gallic acid, condensed tannin and hydrolyzed tannin with a ratio of 1: 1: 1 are compounded to prepare wine-brewing tannin, and the wine-brewing tannin and low-dose sulfur dioxide construct a synergistic system, so that the sulfur consumption of sulfur dioxide is greatly reduced, secondary fermentation of high-sugar wine liquid is prevented, and infectious microbes and wine body oxidation are effectively inhibited. The finished product biogenic amine, pesticide and heavy metal residues all meet the safety standard, mycotoxin is not detected, meanwhile, the original flavor of the wine body is prominent, the storage stability is good, and dual guarantee of health and quality is achieved.