397results about "Natural dyes" patented technology

The utility model belongs to the technical field of sugar alcohol preparation, and relates to a system for co-producing L-arabinose and caramel pigment by using xylose chromatography raffinate, which comprises a raw material tank, a nanofiltration membrane separator, a chromatography separation device, an evaporation concentration tank, a crystallization tank, a centrifugal separator and a dryer which are sequentially communicated by pipelines, and the browning reaction assembly is used for mixing the raffinate and the centrifugal mother liquor and then carrying out browning reaction treatment to prepare caramel pigment. The chromatographic separation device is used for separating an extracting solution and raffinate from the flowing nanofiltration permeate, the evaporation concentration tank and the crystallizing tank are used for concentrating and crystallizing the flowing extracting solution into massecuite, the centrifugal separator is used for separating the flowing massecuite into moist sugar and centrifugal mother liquor, and the dryer is used for drying the flowing moist sugar into L-arabinose crystals. According to the utility model, raffinate and centrifugal mother liquor are mixed to prepare a caramel pigment liquid product, so that a caramel pigment additional product is obtained while the utilization rate of saccharide resources is improved.

1. A composition, which is an anthocyanin-based colorant composition comprising 50-90 mol-%, based on the total amount of anthocyanins, of pelargonidin-based anthocyanins, and wherein (i) >70 mol-% of all anthocyanins are acylated with at least one phenolic acid; and (ii) >20 mol-% of all anthocyanins are acylated with at least one hydroxycinnamic acid; and wherein the composition has a red color with a hue value H≥ in the L*C*h* color system in the range of 10-30, measured at an L*-value of (70.0±0.1) in a 0.1 mol / l trisodium citrate dihydrate buffer at pH 3 in a 1 cm-length quartz cell using Spectraflash 650 (Datacolor) in transmission mode under D65 illuminant 10 Deg. Also, the present invention relates to use of the above compositions as a food colorant.

The invention relates to microbial colorant compositions and associated processes to produce the same. Microbial colorant compositions are produced by combining microbially derived pigment molecules and microbial biosurfactants. The pigment molecules are obtained either directly from a fermentation broth or by extracting a precursor and transforming it into a pigment using chemical or enzymatic processes. A separately produced biosurfactant, such as a rhamnolipid or surfactin, is added to the obtained pigment molecule to create a pre-dispersed formulation. The biosurfactant may be added at various steps of This approach improves pigment dispersion, solubility, and substrate compatibility, enabling stable aqueous formulations without synthetic additives. The resulting compositions are suitable for wide range of applications including in textiles, food, cosmetics, and polymer materials. Processes for producing and combining the pigment and biosurfactant are also disclosed, including variations in fermentation, extraction, and formulation stages.

The invention belongs to the technical field of tea dye extraction, and particularly relates to a tea dye extraction process which comprises the steps of cleaning, drying and crushing tea leaves or tea leaf stalks, extracting pigment, dyeing cloth and fixing color. The tea dye extraction device specifically comprises a first cleaning device, a drying device, a crushing device, an extraction device, a dyeing device and a second cleaning device which are matched with one another to realize an extraction process of tea dye, and the extraction device is cleaned after tea or tea stalks are extracted; according to the tea leaf extraction device, tea leaves or tea leaf stems are smashed and then extracted, extraction is more sufficient, and due to the fact that the extraction device can be cleaned after being used, extracted pigment is purer, and the follow-up dyeing effect is better.

The invention belongs to the technical field of extraction and purification of plant components, and relates to a low-temperature freezing vacuum drying nano processing method for extracting anthocyanin from purple corn, in particular to a method for extracting anthocyanin from corn kernels, cores, straws, roots and stigmas of purple corn. The processing method comprises the steps of pretreatment, concentration, hydroxyl radical treatment, quick freezing, nano crushing and the like. A hydroxyl radical treatment method is adopted, so that harmful substances such as pesticide residues can be efficiently, quickly and thoroughly removed; the effect of extracting the anthocyanin from corn kernels, roots, cores, stems and stigma of purple corn by adopting a low-temperature freezing vacuum drying technology is remarkable, the purification rate is high, and the anthocyanin containing 99% of biological activity is achieved. The nanoscale anthocyanin is processed by adopting jet mill equipment and can be conveniently absorbed by a human body and widely applied to various fields.

This application relates to the field of microbial fermentation technology, and specifically discloses an N-hydroxyamino-N'-acetylguanine blue, its fermentation method and application. The chemical name of the N-hydroxyamino-N'-acetylguanine blue is N-(5'-hydroxyamino-2,6,2',6'-tetraoxo-1,6,1',6'-tetrahydro-2H,2'H-[3,3'] bipyridylmethylene)-acetamide, and the molecular formula is C 12 H 10 O6N4; compared with N-acetylguanine blue, the absorption of N-hydroxyamino-N'-acetylguanine blue is deeper in color at UV611, and at the same time, the formation of hydrogen bonds with amino groups on the fiber can enhance the dyeing property of the dye on the fiber and improve the wash fastness.

The invention relates to natural dye and green chemical industry, and particularly discloses water-soluble biological indigo blue and a preparation method thereof. The water-soluble biological indigo comprises the following raw material components in parts by weight: 80-90 parts of a biological-based indigo concentrated solution; 0.5 to 1 part of dimethyl sulfoxide; 10 to 15 parts of a solubilizer A; 5-10 parts of a solubilizer B; and 10 to 15 parts of deionized water. According to the invention, the bio-based indigo concentrated solution synthesized by a biological method is used as a raw material, the water-soluble compound is innovatively formed through beta-cyclodextrin inclusion and povidone compounding, and the water-soluble compound has relatively high water solubility; the water solubility of the product is greater than or equal to 50g / L, the stability is excellent, the obtained indigo dye is natural in source, environment-friendly and high in water solubility, secondary pollution of the traditional dye to the environment is avoided, and the indigo dye is suitable for sustainable chemical industry and green dyeing and finishing industries and can be widely applied to the fields of textile dyeing, water-based ink, cosmetic color developing agents, medicines and the like.

The invention provides a safflower pigment extraction method. The safflower pigment extraction method comprises the following steps: preparing a safflower decoction; adding whey protein into the safflower boiling liquid, and uniformly stirring; standing for layering, removing supernatant liquid, and then regulating and controlling the pH value of the mixed liquid; selective separation of carthamin yellow and haematochrome is realized through pH control; wherein yellow pigment mud is obtained under the alkaline condition, and red pigment mud is obtained under the acidic condition; the obtained yellow pigment mud and the obtained red pigment mud are subjected to vacuum drying and then ground, and the drying temperature is 30-40 DEG C. According to the safflower pigment extraction method provided by the invention, the selective separation of safflower yellow / red pigment is realized by regulating the pH value, and the limitation of single pigment extraction is broken through; and the weather resistance of the product is effectively improved through low-temperature grinding and a color fixing agent compounding and coating process. The invention further provides application of the safflower pigment.

The invention relates to the technical field of dyeing and finishing, and particularly discloses a biological blue dye, a dyeing solution as well as a preparation method and application thereof. The pyridone dye is mixed into the ornamental blue dye, the ornamental blue light is adjusted, the ornamental blue light shifts to the cyan light, and the red light effect is weakened, so that the problems of reddish color and insufficient dyeing depth after ornamental blue dyeing can be effectively solved, and along with the increase of the mixing proportion of the pyridone dye, higher color depth can be obtained under the same dyeing concentration and number of times, and the dyeing effect is improved. The dry and wet rubbing fastness of the dyed cloth is improved by 0.5 level.

A marker composition for application to a medical device or a surface is disclosed. The marker composition comprises a carrier composition including water, nonionic surfactant, organic solvent, and a neutral or anionic viscosity modifier. The marker composition further comprises a dyestuff. In some embodiments, the quantity of dyestuff present is such that at least some of the dyestuff is present as a dispersed solid phase. The dyestuff may be a naturally-derived dyestuff, such as spirulina extract (including phycocyanin). The invention extends to a carrier composition for a dyestuff.

The invention provides a natural dye lake pigment and a preparation method thereof, and belongs to the technical field of pigments. Soluble silicon-doped carbon quantum dots are introduced into a natural dye solution to serve as a precipitator, the aggregation state of the natural dye is changed, and the lake pigment is obtained through mixing treatment. The prepared natural dye lake pigment is simple in preparation method and mild in preparation condition, the prepared pigment greatly overcomes the defects that natural dye is prone to discoloration and unstable, the oxygen heat resistance of the pigment is improved, the color stability is good, the lake pigment only comprises five elements of C, H, O, N and Si, the ecological pollution-free characteristic is achieved, and the application prospect is wide.

The invention discloses an antibacterial and antioxidant monascus yellow pigment as well as a preparation method and application thereof. The preparation method comprises the following steps: reacting monascus yellow pigment with tannic acid in a solution state, carrying out solid-liquid separation on the obtained product, washing to remove uncombined pigment, and drying the obtained solid to obtain the antibacterial and antioxidant monascus yellow pigment. The preparation method is simple in process, mild in reaction condition, low in cost and suitable for large-scale production; the obtained anti-bacterial and anti-oxidation monascus yellow pigment has the characteristics of safety, anti-bacterial and anti-corrosion effects, high stability, bright color and the like, and can be popularized and applied as a food additive in the food industry.

The invention discloses the technical field of anthocyanin extraction, and particularly relates to a method for extracting anthocyanin in blueberries by using a sodium alginate immobilized enzyme. According to the method, blueberries are used as a raw material, sodium alginate is used as a carrier to immobilize cellulase, and process conditions for extracting anthocyanin are optimized, including sodium alginate concentration, enzymolysis temperature and time, enzyme concentration and enzyme proportion. The immobilized enzyme is applied to an anthocyanin extraction process, when the temperature is 50 DEG C and the reaction time is 3h, the yield of anthocyanin is improved by 18.7% compared with that of free enzyme, and the activity of the immobilized enzyme still keeps 75% or above after the immobilized enzyme is repeatedly used for five times. In addition, the sodium alginate immobilized enzyme shows good thermal stability.

A bio-derived wearable film includes an acid-hydrolyzed palm stem pith, a starch, a cellulose, a synthetic polymer, a plant hydrogel, glycerin, and a dye, and a method of producing the bio-derived wearable film. The bio-wearable film has a water absorption of 0.00 to 0.16% measured according to ASTM D570; a carbonate content of 100 to 200 ppm; and shows no cracks when tested according to ASTM D5419.

The invention relates to the technical field of extraction of effective active ingredients of plants, and provides a method for extracting and purifying high-content tea pigment, which comprises the following steps: weighing a tea leaf raw material, extracting by adopting a hot reflux extraction mode, adding an ethanol water solution with the volume fraction of 0-50%, and extracting at the temperature of 60-100 DEG C; filtering the extracting solution, adjusting the pH value of the extracting solution to 9-11, concentrating under reduced pressure, adding ethanol into the concentrated solution until the alcohol content is 40% v / v-70% v / v, carrying out alcohol precipitation, dissolving and crystallizing the precipitate after the alcohol precipitation, and collecting the supernate; and adsorbing and eluting the obtained supernatant by using a resin filler, collecting the eluent, concentrating and drying to obtain a tea pigment product with the tea pigment content of more than or equal to 80%. The prepared tea is high in pigment content and yield, good in quality, simple in step and suitable for large-scale production.

The invention relates to the technical field of extraction, in particular to natural pigment extraction equipment based on freeze-dried Chinese wolfberry fruits. The device comprises a pigment extraction tank, a driving motor is fixedly mounted at the top of the pigment extraction tank, and a mixing mechanism is arranged in the pigment extraction tank. According to the screening mechanism, through a rotating cylinder and a screening plate, crushed Chinese wolfberries are evenly thrown in a rotating and scattering mode, raw material accumulation is prevented, the Chinese wolfberries are dynamically screened and classified, the consistency of the material granularity is ensured, and the effect of mixing the Chinese wolfberries through stirring blades is further improved through even throwing of the Chinese wolfberries; meanwhile, the cleaning brush cleans residual Chinese wolfberry fruits on the screening plate in the rotating process, the residual Chinese wolfberry fruits on the screening plate are timely cleaned, screening holes can be prevented from being blocked, it is ensured that dynamic screening and grading operation of the screening mechanism on Chinese wolfberry fruit raw materials is continuously and efficiently conducted, and the stable screening function enables the Chinese wolfberry fruit materials entering the pigment extraction link to be consistent in granularity; the contact between the medlar and the solvent is more uniform.

The invention belongs to the technical field of natural dyes, and provides a natural coloring agent based on roxburgh rose whole plant components as well as a preparation method and application of the natural coloring agent. The preparation method comprises the following steps: fermenting whole rosa roxburghii plants, residues obtained after juicing or dried fruits used as raw materials for 15-30 days under a pure natural acidic or alkaline condition, and soaking cloth to be dyed into fermentation liquor for 7-30 days, so as to finish dyeing. The acidic condition is provided by malic acid or acetic acid, and the alkaline condition is provided by pure natural salt. The method has the advantages of simple process, mild conditions, no use of any chemical synthesis auxiliary agent, environmental protection and safety. By means of the method, natural cloth such as mulberry silk, cotton and hemp can be dyed, the unprecedented and unique golden yellow color can be dyed, and the method has great market application value.

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 discloses a preparation method of a high-quality capsicum orange pigment. The preparation method comprises the following steps: drying and crushing pigment peppers, and then carrying out carbon dioxide supercritical extraction to obtain a gas phase and a liquid phase; introducing the gas phase into a separation kettle, and separating to obtain a liquid-phase substance containing capsicum orange pigment; and discharging the pressure in the extraction kettle to obtain a liquid phase as a capsanthin product. The yield of the obtained capsicum orange is 3.22%, the color value yield is 97.01%, and lambda is 0.8312; the content of carotenoid is 0.11%; the total organic content is less than 50ppm; the content of (zeaxanthin, beta-cryptoxanthin and beta carotene) is 90.62%; and the capsaicin content is 0.0009%.

To stably and efficiently provide a sweet potato-derived anthocyanin pigment composition showing a blue purple color tone from a weakly acidic region to a neutral region.SOLUTION: A method for preparing a sweet potato-derived anthocyanin pigment composition showing a bluish purple color tone or blue purple color tone from a weakly acidic region to a neutral region, includes: extracting a water-soluble composition indicating such a compositional feature that percentage contents of only three kinds of cyanidin type anthocyanin of a YGM-0c anthocyanin, a YGM-1a type anthocyanin and a YGM-2 type anthocyanin show 70-lower percent or more of the total anthocyanin, and the percentage content of the total of the cyanidin type anthocyanin shows 80 percent or more of the total anthocyanin, under an acid condition, by using a tuberous root of a sweet potato plant belonging to "Tyurakanasa" as a raw material.SELECTED DRAWING: Figure 1

The present invention discloses a preparation method of high-quality capsanthin with a high absorbance ratio, which comprises the following steps: crushing ordinary pigment peppers to obtain crushed pepper powder and mixing it with an adsorbent; the adsorbent is a mixture of bentonite and attapulgite; adjusting the water content of the mixture and the ring film ratio of the granulation equipment, and granulating the mixture; putting the granulated particles into an extraction tank, adding an extraction solvent, leaching and extracting, and after the solvent mixed oil is filtered by a filter, performing vacuum concentration to obtain high-quality capsanthin with an absorbance ratio greater than 1 and a centrifugal precipitate less than 2%. The particles after extraction are replaced with a solvent for secondary extraction to obtain capsanthin with a low absorbance ratio. The preparation method disclosed by the present invention avoids the solvent pollution and secondary loss caused by producing capsanthin with a high absorbance ratio on the basis of ordinary capsanthin; the process is simple and feasible, the yield of capsanthin is high, and the obtained capsanthin with a high absorbance ratio has good stability and low pectin and phospholipid contents.

Pigment compositions comprising betalain pigment molecules are provided. Compositions comprising betanin and betanidin are also provided as are compositions comprising less than 5% sugars by weight. Cells comprising at least one copy of an exogenous tyrosine hydroxylase gene, at least one copy of an exogenous L-DOPA oxidase gene, at least one copy of an exogenous DOPA 4,5-dioxygenase (DOD) gene, at least one copy of an exogenous NADPH cytochrome P450 reductase gene, and at least one copy of a cyclo- DOPA-5-O-glucosyltransferase gene integrated into the genome of the cell are also provided.

The present invention relates to the technical field of dyes, and discloses a plant dye for silk fabrics and a preparation method thereof. The present invention is provided by adding turmeric dye, phellodendron dye, antibacterial liquid, quaternized chitosan and water into a stirrer, stirring at room temperature, and obtaining the plant dye for silk fabrics after the end. The antibacterial liquid and quaternized chitosan contain a large amount of quaternary ammonium salt groups, which play a good antibacterial role. The cardanol in the antibacterial liquid itself has a certain antibacterial effect, and synergistically antibacterial with the quaternary ammonium salt. The sulfur element contained in the antibacterial liquid can promote the dehydration of the polymer substrate into carbon during the heating process. This carbon layer can effectively isolate the contact between oxygen in the air and the polymer substrate, thereby achieving a flame retardant effect; the boron element can form a glassy coating covering the polymer when heated, and the coating can effectively isolate oxygen and heat, thereby protecting the internal polymer from further combustion, thereby achieving a flame retardant effect.

A comprehensive utilization system for extracting black rice anthocyanin and separating starch is provided with a screw conveyor, an extraction tank is arranged at an outlet of the screw conveyor, stirring blades are arranged in the extraction tank, a liquid outlet pipe is arranged on one side of the extraction tank and connected with a liquid outlet pump through a valve, and the liquid outlet pump is connected with the extraction tank and a liquid storage tank through pipelines. A slag outlet in the bottom of the extraction tank is connected with a screw pump through a pipeline and a valve, an outlet of the screw pump is provided with a pulping machine, an outlet of the pulping machine is provided with a vibrating screen, a filtrate outlet of the vibrating screen is provided with a filtrate collecting tank, the filtrate collecting tank is connected with a horizontal screw centrifuge through a horizontal screw feeding pump, and a slag outlet of the horizontal screw centrifuge is provided with a horizontal screw slag collecting tank; according to the utility model, the extraction of black rice anthocyanin is realized through the extraction tank, starch in black rice is separated and collected by the horizontal screw centrifuge, compared with natural sedimentation, the occupied area is small, the treatment capacity is large, the efficiency is high, the obtained starch has low water content and high quality, and the extraction of black rice anthocyanin and the recycling of starch are realized.

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.