569results about "Natural dyes" patented technology

The invention relates to a carbon and nitrogen dual-recovery method and device for collecting grease and phycocyanin in an algae-bacterium symbiotic sewage treatment system, and the method comprises the following steps: 1, carrying out mud-water separation on phycomycete suspension taken out from the sewage treatment system to obtain phycomycete biomass precipitate; 2, extracting grease in the precipitate in the first step by adopting a chloroform-methanol solution, and collecting the grease to recover carbon; and step 3, adding a hydrochloric acid solution into the biomass extracted in the step 2, heating and stirring, and collecting phycocyanin in supernate to recover nitrogen. According to the method disclosed by the invention, the mode of firstly collecting the grease to extract the carbon and then collecting the phycocyanin to extract the nitrogen is adopted, so that grease loss caused in the process of collecting the phycocyanin is avoided, the collection rate of the grease is improved, and dual recovery of the carbon and the nitrogen can be realized.

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 discloses a method for improving color and stability of anthocyanin through combination with punicalagin. The method comprises the step that punicalagin and anthocyanin are subjected to an intermolecular co-pigmentation reaction. According to the invention, punicalagin is adopted as a co-pigment molecule and is subjected to a co-pigmentation reaction with anthocyanin to form a punicalagin and anthocyanin compound, so that the color attribute of the anthocyanin is remarkably enhanced, and an anthocyanin solution presents brighter red color; the punicalagin and anthocyanin compound is prepared from punicalagin and anthocyanin, the heat stability, the light stability, the pH stability and the storage stability of anthocyanin are improved, the heat stability, the light stability and the storage stability of anthocyanin are further improved when the punicalagin and anthocyanin compound is prepared into microcapsules, and the punicalagin and anthocyanin compound has the advantages of being simple in process and low in cost. According to the invention, the utilization value of the anthocyanin is obviously improved, and a new thought is provided for the application of the anthocyanin in the food industry.

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 discloses application of a benzyltrimethyl eutectic solvent in extraction of amaranth red dye, and belongs to the technical field of eutectic solvents. The method comprises the following steps: putting an ABS (Acrylonitrile Butadiene Styrene) solution formed by a benzyltrimethyl eutectic solvent and K3PO4 into an aqueous solution containing amaranth, and extracting the amaranth dye under a constant-temperature stirring condition. The benzyltrimethyl eutectic solvent is synthesized from benzyltrimethyl ammonium chloride and triethylene glycol. An ABS (Acrylonitrile Butadiene Styrene) solution formed by the benzyltrimethyl deep-eutectic solvent prepared by the invention and K3PO4 has relatively strong trapping capacity on amaranth dye, and the extraction efficiency of the amaranth dye is up to 98.1% under the condition that the mass ratio of the ABS solution to an aqueous solution containing amaranth is 1: 1. Meanwhile, the benzyltrimethyl eutectic solvent has the advantages of simple synthesis, low price and the like.

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.

The present invention belongs to the technical field of functional food application. Disclosed in the present invention are a plant extract modified molecular probe and a preparation method and an application thereof. The preparation method of the plant extract modified molecular probe comprises the following steps: dropping a 3-ethyl-2-methylbenzothiazole iodide solution into a saffron aldehyde solution to obtain a mixed solution; dropping an inorganic salt solution into the mixed solution, mixing and performing a condensation reaction to obtain a plant extract modified molecular probe. The obtained plant extract modified molecular probe has good chemical stability and can be stored for a long time. It has good biocompatibility, is non-toxic, and has good photostability, it is not prone to photobleaching during long-term irradiation.

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.

To provide a natural dye-containing coating that comprises phycocyanin.SOLUTION: A natural dye-containing coating comprises a colorant and a coating vehicle, where the colorant comprises phycocyanin.SELECTED DRAWING: None

The invention discloses a natural vegetable dye dyeing process for a blended fabric. The natural vegetable dye dyeing process comprises the following steps: S1, extracting a natural vegetable dye; s2, dyeing: dyeing the blended fabric by adopting a direct dyeing method or mordanting method; the dyeing temperature, the pH value, the dyeing time and the dye concentration of the blended fabric are determined through a direct dyeing method, and on the basis, the blended fabric is dyed through a mordanting method; s3, soaping: soaping the dyed fabric with a soaping solution; the mordanting method comprises a pre-mordanting method, a one-bath mordanting method or a post-mordanting method. According to the natural vegetable dye dyeing process for the blended fabric, the blended fabric is dyed by adopting a natural vegetable dye one-step method, so that the blended fabric has relatively good dry and wet rubbing fastness and soaping fastness, the UPF value of the dyed fabric can be up to 100 +, and the dyed fabric has good ultraviolet resistance. The application range of the natural plant dye is expanded.

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.

The invention discloses a gardenia blue pigment with high brightness and low redness and a preparation method therefor, and belongs to the technical field of pigment extraction. Genipin, an enzymolysis product of gardenia extract, is used as a raw material. Genipin and amino acids (phenylalanine, tryptophan, glycine, or tyrosine) are weighed at a molar ratio of 1:(0.375-0.75), and subjected to a polymerization reaction under a conventional condition to generate a gardenia blue precursor. The gardenia blue precursor is oxidized to develop a color, refined by using ultrafiltration membrane, and finally spray-dried to obtain the gardenia blue pigment with high brightness, low redness, and low cost.

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.

The invention relates to a pericarp anthocyanin extraction and purification method, which comprises the following steps: taking aired dry grape skin as a raw material, putting the raw material in an extraction tank, adding an extraction solvent for extraction, the extraction solvent comprises an acid aqueous solution and food-grade citric acid, the acid aqueous solution is a sodium pyrosulfite aqueous solution, and obtaining an anthocyanin crude extract; filtering and purifying the crude anthocyanin extracting solution by adopting a hollow fiber membrane to obtain a refined anthocyanin extracting solution; and adjusting the pH value of the anthocyanin refined extract, and carrying out vacuum concentration to obtain a liquid anthocyanin product. According to the method, a traditional extraction method is adopted, an acid aqueous solution of sodium pyrosulfite is selected as an extraction solvent, food-grade citric acid is added, no organic solvent is used, no toxic substance residues exist, meanwhile, the loss of anthocyanin in the subsequent production process is reduced, and the color value and solubility of the anthocyanin product are improved; in addition, fine extract can be obtained by filtering through a hollow fiber membrane during purification, impurities and residual sulfur dioxide are efficiently removed, and the product meets the national standard requirement.

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 present invention addresses the problem of providing: a novel blue dye and a novel red dye; and a dyeing composition that contains the blue dye and / or the red dye and has excellent color-fastness. This blue dye is produced by reacting a mixture that contains an aglycone of an iridoid glycoside and a nitrogenated compound having two or more nitrogenated groups and having no carboxy group, wherein at least one of the nitrogenated groups is a primary amino group or a primary ammonium group. This red dye is produced by reacting a mixture that contains an aglycone of an ester hydrolysate of an iridoid glycoside and a nitrogenated compound having two or more nigrogenated groups and having no carboxy group, wherein at least one of the nitrogenated groups is a primary amino group or a primary ammonium group.