122results about "Natural dyes" patented technology

The present invention relates to a colourant composition based on anthocyanins, comprising an extract of seedless Berberis vulgaris L. fruit and an extract of the skin of Myrtus communis L. fruit; to a method for preparing anthocyanin-based colourant compositions; and to the colourant composition obtained using the method. The present invention also relates to the uses of the colourant composition as a food colourant and, optionally, as a preservative and an antioxidant, and to food products comprising the colourant composition.

This invention relates to the field of edible fungi technology, and discloses a new strain of Auricularia heimuer and its applications. The Auricularia heimuer strain JH-Y6 of this invention was deposited at the China Center for Type Culture Collection (CCTCC) on November 20, 2023, with accession number CCTCC No: M 20232280. Auricularia heimuer JH-Y6 possesses high tyrosinase activity, high melanin production, and excellent agronomic traits, and can be used in the screening and breeding of Auricularia heimu, the extraction process of melanin from Auricularia heimu, and its cultivation. It can also be used in the deep processing of food or health products.

Use of an encapsulated natural color for coloring a household, industrial or institutional (HI&I) product wherein the encapsulated natural color is stable in water to simulated solar irradiation at 765 Watt in accordance with International Commission on Illumination 85 (1989, Table 4, 3 mm window glass) reference sun for a period of between 8 hours and 16 hours.

The invention relates to the field of fermentation product extraction methods, in particular to a method for efficiently extracting intracellular products. According to the method, staged extraction and ultrasound are combined to be applied to intracellular product extraction, and the extraction rate can be obviously increased. After thalli in fermentation liquor are crushed, a non-polar solvent is adopted for first extraction, and ultrasonic short-time low-temperature treatment is adopted in the extraction process, so that the extraction efficiency of a target product can be obviously improved, a polar solvent is added into an extraction phase of the first extraction in second extraction, and ultrasonic short-time low-temperature treatment is performed again, so that the extraction amount of intracellular products is increased; the process does not need complex equipment, is short in operation time consumption and high in extraction efficiency, and is suitable for large-scale industrial production.

COMPOSITION TO DEHYDRATE Tillandsia sp, characterized in that it comprises, in an aqueous solution, a main component selected at least from Na bicarbonate (NaHCO3), ammonium bicarbonate (NH4)HCO3 and calcium hydroxide, for a total, alone or combined with sodium bicarbonate, of from 0.045 g / cm3 of aqueous solution up to 0.10 g / cm3 of an aqueous solution and 0.30 cm3 of a hydroalcoholic solution of carminic acid up to a maximum of 0.80 cm3 / cm3 of an aqueous solution.

The application belongs to the technical field of natural substance separation and extraction, and particularly relates to a kind of Haematococcus pluvialis multi-product cascade separation method based on eutectic solvent sequential extraction and enzyme membrane reactor coupling, comprising the following steps: (1) cell wall weakening pretreatment step; (2) water-soluble component extraction step; (3) pigment component extraction step; (4) astaxanthin extraction step; (5) enzyme conversion step. Through the synergistic effect of eutectic solvent sequential extraction and enzyme membrane reactor, efficient, green and continuous cascade separation of water-soluble components, pigments, astaxanthin and xylo-oligosaccharides in Haematococcus pluvialis is realized, and product purity and resource utilization are improved.

Provided is a biomass-derived isoindoline compound (such as KII or DII) which is safe and can be obtained in a clean and carbon neutral approach. An isoindoline compound containing a radioactive carbon atom 14C and being represented by the following formula (I): in which, in the formula (I), A and B each independently represent an oxygen atom or NH, and R1 to R4 each independently represent a hydrogen atom, a linear or branched alkyl group having 1 to 12 carbon atoms, a fluorine atom, a chlorine atom, a bromine atom, an iodine atom, or a phenyl group which is optionally substituted with an alkyl group, wherein R2 and R3 optionally undergo ring closure to form a 5- to 8-membered ring.

The invention discloses a method for improving yield of anthocyanin extracted by an enzymic method, according to the method, phospholipase is added and used to act on a cell membrane structure, so that the extraction rate of the anthocyanin and the extraction rate of galactoside in the anthocyanin are obviously improved, and the extraction effect of the anthocyanin is greatly improved through a three-stage enzymolysis system. The total enzymolysis extraction time is within 4 h, and compared with 6-7 h of a traditional enzymatic extraction process, the production period is greatly shortened.

The invention provides fruit anthocyanin as well as an extraction method and application thereof. The extraction method comprises the following steps: S1, raw material pretreatment: selecting fresh fruits, removing impurities, cleaning, draining surface moisture, performing crushing treatment, then performing vacuum drying, and finally performing crushing to obtain fruit powder; s2, extracting three-layer microspheres: preparing an extraction substrate solution, adding the three-layer microspheres, and stirring for 8-12 minutes at the temperature of 40-45 DEG C and the rotating speed of 100-150r / min; the rotating speed is kept at 100-150 r / min, the power is set to be 300 W, the temperature is 42-45 DEG C, working is conducted for 4-6 min, pause is conducted for 1-2 min, and intermittent ultrasonic extraction is conducted for 3-4 h; after the extraction is finished, centrifuging an extracting solution, and collecting supernate to obtain a crude extracting solution; and S3, obtaining a final product of the fruit anthocyanin: filtering, adsorbing, eluting and purifying, concentrating and drying the crude extract to obtain the fruit anthocyanin. A targeted attachment-step conversion-enrichment protection and release linkage system is formed among the three-layer structures of the three-layer microspheres, and 1 + 1 + 1gt is realized; and 3, due to the synergistic effect, the activity and the quality stability of the anthocyanin are guaranteed while the extraction rate of the anthocyanin in the fruits is increased.

The present disclosure relates to the field of textile printing and dyeing technology, and particularly relates to an environmentally-friendly liquid dispersion dye with ultra-low pollution; the environmentally-friendly liquid dispersion dye is prepared by the following steps: preparing a Hippophae rhamnoides extract, dissolving the Hippophae rhamnoides extract in an acid solution and mixing with aluminum hydroxide; preparing a Ginkgo biloba extract, dissolving the Ginkgo biloba extract in an acid solution and mixing with aluminum hydroxide; then mixing the two in a sodium bicarbonate aqueous solution with a complexing agent and a stabilizer, drying to obtain a solid, and finally reacting the solid with polyethyleneimine to obtain an environmentally-friendly orange dye with good dispersibility.

This invention belongs to the field of plant active ingredient extraction technology, specifically relating to a process for efficiently extracting anthocyanins from black goji berries. The process includes the following steps: Step 1: Preparing black goji berry powder; Step 2: Adding buffer solution to the black goji berry powder to obtain a black goji berry suspension; adding a complex enzyme to the black goji berry suspension for enzymatic hydrolysis, enzyme inactivation, and cooling to obtain an enzymatic hydrolysate; Step 3: Adding Aspergillus niger to the enzymatic hydrolysate for fermentation, sterilization, and obtaining a primary fermentation broth; continuing to add a complex microbial culture for anaerobic fermentation, sterilization, and cooling to obtain a final fermentation broth; Step 4: Performing alcohol extraction on the final fermentation broth to remove ethanol, obtaining a concentrated crude extract; Step 5: Purifying the concentrated crude extract using AB-8 macroporous adsorption resin, drying, and obtaining the black goji berry extract. This invention's process can simultaneously improve the extraction rates of total alkaloids and anthocyanins from black goji berry extract.

The invention provides a preparation method of a common caramel color and the common caramel color, and the preparation method of the common caramel color comprises the following steps: adjusting the pH value of a sugar raw material to 1-2 by using a first acid auxiliary agent, and carrying out a first-stage coking reaction on the sugar raw material to prepare a first-stage material; adjusting the pH value of the first-stage material to 1-2 by using a second acid auxiliary agent, and carrying out a second-stage coking reaction on the first-stage material to prepare a second-stage material; and mixing the second-stage material with water, adjusting the pH value of the mixed system to 4.5-5 by using an alkali auxiliary agent, and carrying out heat preservation treatment at 90-100 DEG C to prepare the common-method caramel color. The application coloring ability of the common-method caramel color vegetable prepared by the preparation method is remarkably improved, so that the application quality of common-method caramel color in food coloring is effectively improved.

The invention discloses a method for increasing the yield of monascus pigment through liquid fermentation, the monascus pigment is obtained through spore culture, seed culture, liquid fermentation and monascus pigment extraction by taking monascus as a production strain, and macroporous resin is added into a fermentation culture medium. According to the method, the yield of liquid fermentation of the monascus pigment can be greatly increased, the monascus pigment is concentrated in precipitates, namely resin and hyphae after solid-liquid separation is carried out on the fermentation product, a water phase of fermentation liquor does not contain pigment, separation and extraction of downstream fermentation products and treatment of fermentation waste liquor are facilitated, and the method has good market prospects and market value.

The present invention relates to a cosmetic composition containing an organic effect pigment, wherein the organic effect pigment comprises cellulose nanocrystalline flakes, the cellulose nanocrystalline flakes having an average size in the range of 10 to 6500 micrometers.

The invention discloses a batik pigment based on natural plants. The batik pigment comprises the following raw materials: a basic auxiliary agent and at least one color development plant, the basic auxiliary agent is prepared from the following components in parts by weight: 3 to 8 parts of gallnut and 2 to 6 parts of rhizoma curcumae longae; the color development plants comprise the following components in parts by weight: 10 to 20 parts of radix rubiae, 5 to 15 parts of radix scutellariae and 5 to 12 parts of indigo grass. The invention further discloses a batik process adopting the batik pigment. According to the batik pigment based on the natural plants, the problems that a traditional plant dye is single in chromatography and unstable in color matching are solved, the chromatography of the batik pigment is rich and controllable, and the requirement of the batik technology for rich colors is met; the dye is excellent in stability and long in storage life; a wax printing process is adapted, the dyeing effect is stable, and the color fastness is high.

The present invention relates to a dye composition comprising components A) and B) wherein A) is one or more dyes comprising beet pigments, in particular beet glycosides, and B) comprises one or more of citric acid, ascorbic acid, malic acid and ethylenediaminetetraacetic acid and at least one salt, as well as the use of the dye composition and a final consumer product comprising the dye composition.

The invention discloses a method of extracting high-purity melanin from Black Soldier Fly(Hermetia illucens)larvae. The methodessentially comprises ofenzymatic breakdown of polymer exoskeleton components, subcritical water extraction, low-pH hydrolysis using formic acid, nanofiltration using graphene oxide membranes, ultrasonic treatment for metal ion removal and crystallization using supercritical CO2 to achieve melanin with purity levels greater than 95%. This method reduces the need for harmful organic solvents and treatment with acids,thereby making the process sustainable and environment friendly.

A blue pigment for cosmetic applications is provided, which exhibits excellent color and stability characteristics, while being fully plant-based, edible and of natural origin.

The invention discloses a gardenia blue pigment as well as a preparation method and application thereof, and the preparation method comprises the following steps: adding neutral amino acid or arginine with the molecular weight greater than 130 into a phosphate solution containing genipin, and reacting under the condition that the pH is 4-10 to obtain a reaction solution; the reaction solution is sequentially eluted through a macroporous resin chromatographic column, water and 30%-80% ethyl alcohol, a developed ethyl alcohol eluent is collected, vacuum concentration and drying are conducted, and the gardenia blue pigment is obtained. According to the method, the phosphate solution is adopted as a catalyst to catalyze the genipin to react with the preferable arginine and the specific neutral amino acid to synthesize the high-tone gardenia blue pigment, meanwhile, the reaction temperature and time are regulated and controlled, the quality of the gardenia blue pigment is improved, the characteristic lambda max of the visible spectrum of the gardenia blue pigment is not lower than 602 nm, and A610 / A585 is not lower than 1.0; the prepared high-tone gardenia blue pigment is safe and non-toxic, and can be applied as a coloring agent in the fields of food, cosmetics and pharmaceuticals.

The invention relates to a powder preparation method of a dye plant extract, dye powder and a textile dyeing method. The powdering method comprises the following steps: soaking dye plant raw material powder to extract carbohydrates at 70-90 DEG C under an alkaline condition by using ethanol as a solvent, and separating an ethanol extracting solution after the extraction is completed; taking water as an extraction solvent, and extracting the dye plant raw material subjected to the sugar removal treatment to obtain an extracting solution; concentrating the extracting solution, and adding dextrin; and performing spray drying to prepare dye powder. The invention also provides a dyeing method based on the dye powder. According to the technical scheme provided by the invention, macromolecular saccharides can be converted into micromolecular saccharides under high-temperature and alkaline conditions, and the micromolecular saccharides are dissolved in ethanol to be removed, so that the content of saccharide impurities in pigment dye during subsequent aqueous solution extraction is greatly reduced, and the problem of wall sticking of an extract in a drying tower during spray drying can be obviously improved with the help of dextrin.

The present invention relates to the field of fungal production of dyes and pigments and the application of said fungal production of dyes for dyeing substrates. More specifically, the present invention relates to an isolated fungus belonging to the species Fusarium solani deposited under the number DSM 34187, a dye produced by said fungus, a method for dyeing a substrate using said fungus, a method for dyeing a substrate using a dye produced by said fungus, a method for producing said dyes, and also the further application of said dyes as antimicrobial substances.

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

The present disclosure relates to a composition derived from an extract of a proprietary variety of sorghum that provides excellent natural color antioxidant and functional ingredient properties. The composition can be used in product coloring applications such as food, consumables, clothing, fabrics, polymers, beverages, dietary supplements, etc. Due to its good properties, the composition can be included in products where a red dye or colorant is required, either alone or with other colorants to create different colors, hues, or shades.

A method for extracting chromoplasts is provided. Plant tissues are added with an extraction solvent, homogenized and filtered to collect a filtrate, which is further centrifuged. The supernatant is discarded, and the precipitate is collected as a crude extract. The crude extract is subjected to gradient separation with a series of sucrose solutions. A chromoplast-enriched layer is pipetted, added with the extraction solvent and centrifuged. The precipitate is collected as a purified chromoplast extract. A chromoplast extract obtained by the method and an application thereof are also provided.

The invention belongs to the technical field of dye preparation, and particularly relates to a preparation method and application of anthocyanin dyestuff, the preparation method comprises the following steps: adding a grape skin residue solid raw material into an extraction solvent for extraction, filtering to obtain filtrate, concentrating the filtrate to 10-20% of the original volume under the vacuum pressure of 0.05-0.08 MPa and the temperature of not more than 60 DEG C, and filtering to obtain the anthocyanin dyestuff. An anthocyanin dye concentrated solution is obtained; the method comprises the following steps: adding a concentrated solution into an anthocyanin dye solution, then adding a lifting treatment auxiliary agent into the concentrated solution to carry out stability and color fastness lifting treatment, stirring and reacting at 50-70 DEG C for 30-90 minutes, and then adding a compound stabilizer into the dye subjected to stability and color fastness lifting treatment to obtain the anthocyanin dye product, wherein the addition amount of the lifting treatment auxiliary agent is 1-5% of the mass of the concentrated solution. According to the method, through systematic process integration and multi-technology synergistic interaction, efficient extraction of the anthocyanin in the grape pomace is achieved, the dye stability is remarkably improved, and the batik application color fastness is improved in a breakthrough mode.

The invention provides a natural carthamin yellow-beta-cyclodextrin inclusion compound with high stability and a preparation method of the natural carthamin yellow-beta-cyclodextrin inclusion compound, and belongs to the technical field of stable modification of natural pigments. The natural carthamin yellow-beta-cyclodextrin inclusion compound comprises beta-cyclodextrin and natural carthamin yellow, wherein the molecular ratio of the beta-cyclodextrin to the natural carthamin yellow is 1: 1. The preparation method comprises the following steps: dissolving beta-cyclodextrin in water to form a beta-cyclodextrin saturated solution, adding natural carthamin yellow into the beta-cyclodextrin saturated solution, stirring for 1 hour at the temperature of 50 DEG C, and freeze-drying to obtain the natural carthamin yellow-beta-cyclodextrin. According to the natural safflower yellow-beta-cyclodextrin inclusion compound, beta-cyclodextrin serves as a subject, natural safflower yellow serves as an object, and the inclusion compound with the low pigment loss rate and the high light stability is successfully prepared by optimizing three key process parameters including the subject-object molecular ratio, the stirring temperature and the stirring time. The protection effect on the natural carthamin yellow is improved.

The invention relates to an extracellular green pigment-producing coleus carnosus mutant strain as well as a fermentation method and application thereof, and belongs to the technical field of microorganisms. The technical problem to be solved by the invention is to provide the pediococcus carnosus which can secrete green pigment in an extracellular manner and is high in yield and good in stability, and the green pigment obtained by fermentation of the pediococcus carnosus is stable in property. According to the key point of the technical scheme, the Keitobacteria carneus BG-G1-uv03 is a strain of the Keitobacteria carneus BG-G1-uv03, the Keitobacteria carneus BG-G1-uv03 is preserved in the Guangdong Microbial Culture Collection Center, and the preservation number is GDMCC (Guangdong Microbial Culture Collection Center) NO: 67281. According to the mutant strain of the extracellular green pigment-producing coleus carnosus and the optimized fermentation process, a new strain resource and a technical scheme are provided for industrial production of natural microbial pigments, and the mutant strain has important economic value and environmental significance.

The application provides a preparation method of a high-stability safflower yellow pigment preparation, (1) safflower powder is added into an ethanol aqueous solution containing sodium dihydrogen phosphate for extraction, the residue is repeatedly extracted, the filtrates are combined, sodium dihydrogen phosphate is added for dissolution, and the mixture is left to stand, and the upper extraction liquid is concentrated to obtain safflower yellow extract A; (2) the safflower yellow extract A is subjected to silica gel chromatography column elution, and the eluate is collected; (3) the eluate is mixed with a metal chelating agent, an antioxidant protective agent and wall material A, and concentrated to obtain safflower yellow extract B; (4) wall material B in an aqueous solution, safflower yellow extract B and an antioxidant protective agent are mixed and emulsified, and spray drying is carried out to obtain the safflower yellow pigment preparation. In the process of extracting the safflower yellow pigment, the ethanol aqueous solution containing sodium dihydrogen phosphate is combined with silica gel chromatography extraction and purification, which can effectively protect the safflower yellow from degradation in the processing process, reduce the heating time of the safflower yellow in the processing, improve the retention rate of the safflower yellow, and obtain a high-stability, high-color-value safflower yellow powder product.

The present application provides a betalain-cyanidin composite pigment composition, a dyeing agent and application, the composition is combined by cyanidin freeze-dried powder and betalain freeze-dried powder according to the mass ratio of 5:1-5. The betalain-cyanidin composite dyeing agent formed by the composition has good temperature stability and pH stability, and strong coloring power, and can be widely applied to product materials containing kapok, silk, cotton, hemp and the like.