264 results about "Gardenia yellow" patented technology

The invention relates to a extraction of high-purity gardenia glycosides and high color valence gardenin, concretely said is industrialization producing high-purity gardenia glycosides and high color valence gardenin by using macroreticular adsorbent resinous method, silica gel column chromatography. Dealing with the Cape jasmine dried fruit power by using the technique of leaching, concentration, extraction and macroreticular adsorbent resinous, then after vacuum drying, silica gel column chromatography and dehumidification will get white gardenia glycosides or gardenin finished product of high purity. The high purity white gardenia glycosides or gardenin finished product of this invention have the character of using expediently, high security and tinctorial power and so on; the purity of the gardenia glycosides is high; the productive technology is easy, fast, safe and the cost is low, it founds new technology approach to comprehensive use the gardenia resource; getting the gardenia resource to be used efficiently and improving the added value of gardenia product.

The invention discloses a method for preparing gardenia pigments from Gardenia jasminoides Ellis, and belongs to the technical field of natural pigment preparation methods. The method comprises the following steps: carrying out crushing peeling, extraction, filtration, macroporous resin purification, eluting, concentrating, drying and the like on Gardenia jasminoides Ellis which is a raw material to obtain a gardenia yellow pigment and geniposide, and processing the geniposide through a biological engineering technology and a membrane filtration and acid precipitation process to prepare a gardenia blue or red pigment. The method allows the production cost of the gardenia yellow pigment to be reduced and the comprehensive utilization level of the raw material to be simultaneously improved; and the prepared series pigments can be applied to fields of foods, health products, cosmetics, medicines and the like.

The invention relates to a new process for extracting high-purity gardenia yellow pigment by a membrane separation and purification technology. The new process comprises processes of purified water leaching, crude separation and impurity removal, membrane separation and purification, and membrane concentration. After purified water extraction and ultrasonic assisted extraction, raw gardenia is separated by three centrifuges with different specifications and then obtained leaching liquor enters a membrane separation, purification and concentration system which consists of a microfiltration membrane (MF), an ultrafiltration membrane (UF), a nano-filtration membrane (NF) and a reverse osmosis membrane (RO), thus an OD value of the obtained gardenia yellow pigment can be controlled below 0.4 and color number can be increased to be more than 400. The finished product obtained by the process has no residual organic solvent and completely meets technical requirements for exporting to developed countries, including Europe and America, etc. as well as developed areas. The process is safe and clean in the whole production process, capable of realizing zero pollution and zero emission, has high environmental protection performance, and has advantages of greatly reducing energy consumption and lowering production cost due to the membrane concentration technology. The process further has advantages of simple process, stable product quality, high purity, etc.

The invention discloses a process for preparing gardenin comprising the steps of, A. airing cape jasmine dried fruits, disintegrating and sieving, B. charging petroleum benzene, supersonic extracting, and combining the filter liquor, reclaiming petroleum benzene to obtain vegetable oil, C. ethanol supersonic extracting, filtering, reclaiming ethanol, obtaining ethanol extract, D. eluting the ethanol extract with deionized water, E. depigmenting with ethanol, reclaiming the ethanol to obtain crude gardenin, F. removing impurities with 5% ethanol elution, E. depigmenting with 10% ethanol, concentrating the ethanol, drying and dewatering, thus obtaining gardenin.

The invention discloses a preparation method of high pure crocin and geniposide. The preparation method comprises following main steps: selecting raw materials of gardenia ellis plants, extracting with water or an alcohol-water mixed solution, merging the extracting solutions, condensing, filtering, subjecting the obtained extracting solution to an adsorption treatment by macroporous resin, then performing gradient elution with a ethanol-water mixed solution, obtaining geniposide and gardenia yellow refined extracts; subjecting the geniposide refined extract to a recrystallization treatment with ethyl acetate so as to obtain the geniposide product; subjecting the gardenia yellow refined extract to go through column chromatography, which has been pressurized and stuffed with modified silica gel, to separate, and obtaining the high pure crocin product (color value larger than 600) and a chlorogenic acid component. The products have the advantages of high purity, simple technology, strong operability and convenience for automation, comprehensive utilization of the plant resources is achieved, the solvent is convenient to recycle and reuse, and the preparation method is easy to apply to the industrial amplification.

The invention provides a natural pigment composition. The natural pigment comprises an emulsifier and two or more than two pigments of gardenia yellow pigment, curcumin, carithamine, citroxanthin, xanthophyll, riboflavin, capsaicin, monascus red pigment, bixa orettana pigment and gardenia blue. Natural pigments can prepare natural pigment compositions in different color systems and different tones in arbitrary proportions, such as yellow, orange, red, green and purple. Meanwhile, the natural pigment composition contains the emulsifier, so that the composition can be more uniform and more stable. Therefore, in the natural pigment composition provided by the invention, combinations of different natural pigments can overcome the defect of single pigment, for example, the light resistance of natural yellow pigment combined by the riboflavin, the curcumin and the like with poor light resistance and the gardenia yellow pigment with more stable light resistance is better than that of the riboflavin or the curcumin, thus the dosage can be reduced, and the cost can be reduced.

The invention discloses nutritional yolk milk pudding and a preparation method thereof. The requirements of consumers who are glad to eat jelly foods are met, and the disadvantages that the conventional jelly food in which jelly is taken as a main ingredient has no nutrient components and is harmful to the physical health of eaters are overcome. The nutritional yolk milk pudding consists of milk, yolk, compound food gum, citric acid, gardenia yellow pigment and yolk essence according to the corresponding weight proportion. The production method comprises the following steps of: steaming the yolk, adding a small amount of milk, and mashing to obtain slurry; adding the milk into gum powder and powdered sugar and boiling to obtain a gum solution; and adding an obtained yolk liquid, the pigment, the essence and the citric acid into the hot gum solution, filling, sealing, sterilizing, and cooling to obtain the nutritional yolk milk pudding. The invention has the advantages that: the food gum is taken as a carrier, the milk and the yolk are added, and a jelly food with rich nutrition is provided; nutritional and health-care functions of the milk and the yolk are applied to the production of the jelly, so that the characteristic of no nutrition of the jelly is improved; the product can be eaten by crowds of various ages such as children, adults, elders and the like; and good flavor and quality of the product in shelf life are ensured by a proper process.

The process of preparing gardenia yellow pigment includes the following steps: 1. simultaneous water extracting and enzymolysis to obtain extracted solution; 2. adding calcium salt into the extracted solution to clarify, centrifuging and ultrafiltering to obtain filtrate; and 3. macroporous resin adsorption of the filtrate, three-section eluting chromatography, concentrating, and drying to obtain gardenia yellow pigment with high color number and low jasminodin content. The process is simple and suitable for use in industrial production and can eliminate jasminodin chlorogenic acid effectively, and the gardenia yellow pigment product has A238 / A440 not higher than 0.4, A325 / A440 not higher than 0.35, color number of about 400 and stable quality.

The invention discloses a preparation method of a natural-textured cigarette paper. The method is characterized by comprising the following steps of: A, preparing as dyes by mixing one or more of caramel pigment, lycopene, anthocyanin, gardenia yellow pigment and Zimbabwe tobacco extract according to a weight ratio; B, preparing thickening agent by using one or more of potassium humate, sodium humate, sodium alginate, potassium alginate, guar gum and pectin according to a weight ratio for further use; C, uniformly mixing deionized water, dye and viscosity material according to a weight ratio for further use; D, stirring at normal temperature to obtain coating liquid; E, using the coating liquid in flexographic printing of the cigarette paper, coating the coating liquid on the single face or double faces of the cigarette paper; and obtaining the natural-textured cigarette paper and drying. The preparation method utilizes flexographic printing technology, naturally hangs liquid to print the natural-textured cigarette paper and endows the cigarette paper characteristic appearance and certain anti-fake function without modifying the sucking quality of the product.

The invention discloses a method for preparing gardenia yellow pigment by using gardenia as a raw material. The method comprises the following steps: according to strong and weak capabilities of HPD-100 type macroporous resin in absorbing different components in extract of the gardenia, sampling at a special speed, washing by alcohol solution with different concentrations at different eluting speed, and collecting washing liquor by stages; eluting by deionized water and 25 percent alcohol in sequence, and collecting eluant; and using an absorbance A238 smaller than 0.8 as an eluting end point; then using 70 percent alcohol to elute the gardenia yellow pigment, collecting the gardenia yellow pigment by OD lower than 0.8; and finally spraying and drying the gardenia yellow pigment solution to prepare the finished product of the gardenia yellow pigment. The gardenia dregs after extraction can be used as feed additive or fertilizer. The technique referred in the whole method does not produce solid dregs and technical waste water, is an environment-friendly technique and suitable for enterprise production, and has good product quality and high economic value.

The invention provides a separation method of the geniposide, including: extracting the geniposide from the Gardenia to produce a concrete with a hydrophilic organic water solution; removing the gardenia yellow pigment of the concrete by a large-hole adsorbed resin; depressed recovery of the solvent of the transudate, and concentrating to a coarse geniposide in vacuum; fully extracting the coarse product by hot ethylhexoate, cryogenic treatment of the extract, getting the geniposide crystal; crystallizing the ethylhexoate and acetone solvent and removing the impurities in room temperature; an obtaining the geniposide crystal with a purity >=98%. The invention separates the highly purified geniposide crystal. It has a cheap material, an easy and effective preparation craft, a broad extension and a novel design.

The invention provides a method for producing gardenia yellow pigment, which comprises the following steps of: crushing gardenia fruits, extracting the gardenia fruit powder by using aliphatic hydrocarbon, then filtering the extract, and collecting filter residue; extracting the filter residue by using ethanol solution, and performing vacuum concentration on the extracted solution to obtain firstpigment concentrated solution; diluting the first pigment concentrated solution by using deionized water, performing primary purification by using macroporous resin, and then treating the solution byusing deionized water and ethanol solution as eluent and using an aqueous solvent as extrication solution in turn to obtain extrication solution containing pigment, and performing vacuum concentration on the extrication solution containing the pigment to obtain second pigment concentrated solution; and diluting the second pigment concentrated solution by using the deionized water, then performingsecondary purification by using chromatography resin, and treating the solution by using an aqueous solvent as a mobile phase to obtain the gardenia yellow pigment. The gardenia yellow pigment prepared by adopting the method has lower bitter and odor, and has wider application range.

The invention provides a method for efficiently separating crocetin from fruits of rubiaceous plants and gardenia (stenophyllous gardenia, spoonleaf gardenia, gardenia hainanensis, gardenia sootepensis and gardenia) plants, saffron and saffron tissue cultures. The crocetin can be prepared by the method, and meanwhile, the gardenia yellow pigment and the saffron pigment can be prepared. The method comprises the following steps: extracting the pigment of gardenia fruits (the saffron and the saffron tissue cultures) through acid water or directly extracting raw materials through alkaline water, then carrying out water liquid acidification, then extracting ethyl acetate to obtain a crocetin crude product, and recrystallizing the crude product through different solvents to obtain a crocetin pure product. The crocetin, the gardenia yellow pigment and the saffron pigment provided by the invention can be applied in preparing cardiovascular and cerebrovascular disease medicaments, gynecological disease medicaments, tumor adjuvant therapy medicaments and foods. The method of the invention has reasonable design, the crocetin, the gardenia yellow pigment and the saffron pigment can be obtained in large scales and have high yield, and the method is quite suitable for industrialized production.

The invention relates to a method for preparing a high-color-value gardenia blue pigment. The invention aims to provide a method for preparing the high-color-value gardenia blue pigment through fully utilizing plenty of gardenoside in gardenia yellow waste liquor. The gardenia blue pigment prepared by adopting the method has the characteristics of high color value, high quality, high purity, environmental friendliness, and the like. The method for preparing the high-color-value gardenia blue pigment comprises the following steps of (1) gardenoside enzyme hydrolysis: carrying out enzyme hydrolysis on the gardenia yellow waste liquor with beta-glucosidase as the hydrolytic enzyme; (2) blue turning of the gardenoside hydrolysate: adding amino acid into the gardenoside hydrolysate obtained in the step (1) to react; (3) ultrafiltration separation of the gardenia blue pigment: carrying out ultrafiltration on the blued solution obtained in the step (2) by using an ultrafiltration membrane; and (4) extraction and purification of the gardenia blue pigment: drying trapped fluid obtained in the step (3) and carrying out extraction through mixing with methyl alcohol or ethyl alcohol to obtain the high-color-value gardenia blue pigment.

The invention provides a natural pigment composition. The composition comprises an emulsifier, and two or more than two pigments selected from gardenia yellow pigment, curcumine, carthamin yellow, orange yellow pigment, xanthophylls, riboflavin, capsanthin, monascus red pigment, anattotree orange pigment and gardenia blue pigment. All the above natural pigments can be blended according to an arbitrary ratio to obtain the natural pigment composition with different color systems and different tones, such as yellow, orange, red, green and purple. The natural pigment composition contains the emulsifier, so the composition is uniform and stable. The combination of different natural pigments in the natural pigment composition makes up the defect of single pigments, for example, the light resistance of the natural yellow pigment composition obtained by combining riboflavin and curcumine with poor light resistance with stable gardenia blue pigment is better than that of riboflavin or curcumine, so the use amount is reduced, and the cost is reduced.

The invention discloses a method for dyeing wool by use of natural dyestuff-gardenia yellow, belonging to the field of textile printing and dyeing. The method comprises the following steps: (1) tanning wool, namely placing the wool in a 9g / L formaldehyde solution with pH value of 9.5 and reacting at 50 DEG C for 48h, then adjusting the pH value of the solution and continuing to react for 1h, taking the wool out and cleaning for later use; (2) preparing dyeing liquid, namely adding dyestuff, preparing the dyeing liquid according to a bath ratio, then adding NaCl and JFC (fatty alcohol-polyoxyethylene ether), stirring uniformly, and adjusting the pH value; and (3) dyeing and carrying out post treatment, namely performing dip dyeing on the tanned wool in the dyeing liquid, taking out and placing into afterchrome dye bath with pH value of 4.0, treating for 20min at 65 DEG C, taking the wool out, washing off the unfixed dyes and airing. The method adopts an optimized tanning method during tanning, so that the tolerable temperature of the wool is greatly improved, and the wool can be dyed at high temperature without curling.

The present invention provides a natural pigment composition, which comprises an emulsifier and two or more than two pigments selected from gardenia yellow pigment, curcuminoid, saffower yellower, orange yellow pigment, lutein, riboflavin, capsanthin, monascus red pigment, annatto and gardenia blue pigment. According to the present invention, various natural pigkments are blended according to any ratios so as to obtain the natural pigment compositions having different color systems and different tones such as yellow, orange, red, green and purple, and the natural pigment composition contains the emulsifier so as to make the composition uniform and stable, such that in the natural pigment composition, the combination of different natural pigments can make up the defects of the single pigment, wherein the light resistance of the natural yellow pigment obtained by combining the poor light resistance riboflavin, the poor light resistance curcuminoid and the like and the stable gardenia yellow pigment is superior to the light resistance of the riboflavin or curcuminoid so as to reduce the use amount and reduce the cost.

The invention discloses a natural dyeing method of a yellow modal fabric. The natural dyeing method comprises six stages as follows: pretreatment, drying, dyeing, water washing, color fixing and after finishing, wherein a natural gardenia yellow dye made from gardenia and ethanol through heating reflux is adopted in the dyeing process; water washing is carried out twice at different temperatures in the water washing stage, so that the coloring fastness of the dye is guaranteed. The natural dyeing method provided by the invention has the advantages that on one hand, the method of dyeing the modal fabric by using the natural dye can not cause pollution to the environment and has no harm on the human body, and also is in accordance with the color styles of nature, simplicity and elegance of the modal fabric, and therefore, the ecological environmental protection performance of the modal fabric is improved, the additional value of the modal fabric products is greatly increased, the requirements of people for healthy clothes are met and great practical value of the method is reflected, and on the other hand, the effects of quick coloring and even and stable color are achieved.

The invention discloses an application of a ginger extract used as a penetrating agent in a plant hair dye. Two dyes are prepared and matched in use, wherein the No.1 dye is prepared in such a way that the ginger extract is used as the penetrating agent, copperas is used as a dye, and thickening agent and deionized water are added; and the No.2 dye uses gardenia yellow pigment or rhizoma coptidis, giant knotweed, nutgall, pomegranate rind, Jamaica wood, red sorghum pigment, rutin and lawsonia pollen as a dye macromolecule. The two dyes are respectively prepared and stored, and used together during hair dyeing. The invention does not contain chemical dye, chemical penetrating agent and hydrogen peroxide, does not damage hair quality and keeps color for more than 45 days.

The invention discloses an industrial gardenia yellow pigment purification device and a method for extracting the gardenia yellow pigment. The device comprises an elution column, a vacuum recycling tank, a condenser, a dehydration column and a solvent heater, wherein the elution column, the vacuum recycling tank, the condenser, the dehydration column and the solvent heater are sequentially communicated with one another by virtue of pipelines; a sampling pipe is communicated with a pipeline between the elution column and the vacuum recycling tank; a sampling valve is arranged on the sampling pipe; a vacuum pump is arranged at the outlet of the dehydration column; a collection pipe is communicated with a pipeline between the dehydration column and the solvent heater; a collection valve is arranged on the collection pipe; the dehydration column is filled with dehydrating agents; and a water bath heating jacket is arranged outside the vacuum recycling tank in a sleeving manner. The method comprises the step of purifying gardenia yellow pigment from fine powder of solid gardenia yellow pigments containing lots of impurities. The device is simple in structure and convenient to use and is suitable for industrial production. The method is simple, low in cost, clean and environmentally friendly. The gardenia yellow pigment obtained by using the method is small in losses, high in purity and high in color value.

The invention provides non-fried selenium-enriched instant noodles. The ingredients and the mass ratios thereof are as follows: flour 200 kg, emulsifier 400-600 g, flour improver 500-700 g, citric acid 180-220 g, edible salt 4 kg, dietary alkali 0.4 kg, wheat gluten 8 g, food dye gardenia yellow 140 k, water 80-95 kg, modified starch 25 kg, raw starch 30 kg and selenium-enriched malt meal 0.3-0.4 kg. The non-fried selenium-enriched instant noodles have the advantages of quickness, cleanness, safety and so on. After being infused with hot water, the noodles have no hard center, and taste well, smooth and flexible.

The invention discloses a method for extracting geniposide from gardenia yellow pigment waste liquor, which mainly comprises the following steps: concentrating gardenia yellow pigment waste liquor used as a raw material through a reverse osmosis membrane, extracting with isobutanol, decolorizing with active carbon, concentrating, performing crystallization purification twice, and finally drying. The invention can solve the waste problem that the gardenia effective component can not be economically and effectively recovered from the gardenia yellow pigment producing waste liquor in an environment-friendly way.

The invention provides a production method of a gardenia yellow pigment, which comprises the following steps: a) extracting gardenia fruit powder to obtain a first pigment solution; b) purifying the first pigment solution with macroporous adsorption resin to obtain a second pigment solution; c) performing ultrafiltration of the second pigment solution by an ultrafiltration membrane to obtain a filtrate, wherein the ultrafiltration membrane is an ultrafiltration membrane with a molecular weight cutoff of 20000 dalton-100000 dalton; d) concentrating the filtrate obtained in step c) by a nanofiltration membrane to obtain the gardenia yellow pigment, wherein the nanofiltration membrane is a nanofiltration membrane with a molecular weight cutoff of 100 dalton-500 dalton. When the gardenia yellow pigment obtained by the production method provided by the invention is prepared into a preparation, precipitates are not easy to generated during refrigeration, and the preparation has a wide application scope. In addition, the production method of the gardenia yellow pigment of the invention has a simple process, and high production efficiency, and is applicable to industrial production.

The invention provides modified gardenia yellow and a method for dyeing cationic modified cellulose fabric by using modified gardenia yellow. The preparation method of the modified natural dye gardenia yellow comprises the following steps: adding natural dye gardenia yellow, sodium hydroxide and alcohol into a reaction container, performing reflux condensation, heating the reaction container from the room temperature to a predetermined temperature, preserving the heat, and obtaining a product solution; and after the reaction is ended, cooling the product solution to the room temperature, removing the alcohol, drying, and obtaining the modified natural dye gardenia yellow. The method for dyeing the cationic modified cellulose fabric by adopting the modified natural dye gardenia yellow comprises the following steps: placing the modified cellulose fabric into dye liquor containing modified natural dye gardenia yellow, dyeing at the room temperature, heating to a predetermined temperature, preserving the heat, and dyeing; and after the dyeing is ended, taking out the cellulose fabric, washing with water, and drying to obtain a dye finished product. The technical scheme is simple in operation, low in cost, high in efficiency and capable of realizing the large-scale production.

The invention discloses an ultrasonic extracting process for gardenia yellow pigment. The process comprises the steps of mixing gardenia fruit powder and an ethanol-water solution having a volume concentration of 71-73% with the ratio of the solution to the powder (V / m) being 23-24 mL : 1 g; extracting for 1.1-1.2 hours with ultrasonic at a temperature of 51-52 DEG C twice, wherein the ultrasonic frequency is 27 kHz-31 kHz; and mixing the obtained extracting solutions of the gardenia yellow pigment. The invention also discloses an optimized method of response surface methodology used in the extracting process for the gardenia yellow pigment. The optimized method sets four variables of the volume concentration of ethanol in the ethanol water solution, the liquor-to-material ratio of the gardenia fruit powder and the ethanol water solution, extracting temperature and extracting time, and performs an optimization by using a design expert soft according to a Box-Behnken design principle. By adopting the extracting process for the gardenia yellow pigment, an extraction rate of the gardenia yellow pigment is improved.

The invention discloses an extraction method of gardenia yellow pigment, comprising the steps of: (A) crushing peeled gardenia to obtain gardenia particles, adding water to the gardenia particles and leaching the gardenia particles to obtain leachate; (2) carrying out solid-liquid separation on the leachate to obtain supernatant, and carrying out microfiltration on the supernatant to obtain first filtrate; (C) adsorbing gardenia yellow pigment in the first filtrate utilizing resin, and eluting the resin to obtain eluate; and (D) carrying out ultrafiltration on the eluate to obtain second filtrate, and finally drying the second filtrate to obtain gardenia yellow pigment. By utilizing the extraction method disclosed by the embodiment of the invention, gardenia yellow pigment with high color number, high purity, high quality and long storage life can be obtained; and the obtained gardenia yellow pigment does not turn into green or grey after long-term storage.

The invention relates to an extraction and separation method for geniposide and gardenia yellow with high yield and high purity. The invention provides a highly-efficient mild aqueous two-phase technology to realize synchronous separation and purification of the geniposide and the gardenia yellow. The method comprises the following steps: preparing gardenia extract by using gardenia fruit powder as a raw material, then subjecting the obtained gardenia extract to extraction and separation through a multistage low-molecular alcohol-salt aqueous two-phase system, carrying out concentration and drying so as to obtain primary geniposide and gardenia yellow crystals, and carrying out recrystallization so as to obtain geniposide crystal with purity of more than 98.5% and gardenia yellow crystal with a color value of 535. The method provided by the invention has the advantages of simple operation, greenness, high efficiency, economy, time conversation and facilitation to enlargement. Meanwhile, the method initiates application of an aqueous two-phase extraction technology in synchronous separation of the gardenia yellow and the geniposide, and improves separation and purification efficiencies of the geniposide and the gardenia yellow.

The invention discloses a method for extracting gardenia yellow pigment from a gardeniae longicarpae fruit, which comprises the following steps of: feeding gardeniae longicarpae fruit powder and a solid-phase reagent in a ball grinding mill for ball milling to be uniform; taking out powder formed by ball milling; adding water in the powder formed by ball milling; fully stirring and uniformly mixing, filtering and obtaining supernate; feeding the supernate to a macroporous resin chromatography column; eluting with 60 percent by weight of ethanol aqueous solution; collecting an eluent; condensing and evaporating to remove a solvent; drying and feeding the mixed solution to pass through the macroporous resin chromatography column; condensing and evaporating to remove the solvent; and drying to obtain the gardenia yellow pigment. The method disclosed by the invention is based on an extraction technology of mechanochemical reactions; and the solid-phase reagent used by the method can be selectively combined with the gardenia yellow pigment. Compared with a traditional extraction technology, the extraction rate and the purity of products can be improved by 10-20 percentage points.

The invention relates to a method for separating and purifying geniposide by using an isopropanol-salt double-aqueous-phase system. The invention provides an efficient and gentle method for separating and purifying geniposide by using a double-aqueous-phase technique. The method comprises the following steps: producing a waste gardenia yellow liquid from a cape jasmine fruit raw material, performing extraction separation and concentration drying on the waste gardenia yellow liquid by using the isopropanol-salt double-aqueous-phase system, thereby obtaining a primary geniposide crystal product, and further recrystallizing, thereby obtaining geniposide crystal of which the purity is greater than 98.5%. By adopting the method, a natural geniposide product with high purity is separated and purified from a medical resource for both food and medicine. The method is simple and convenient to operate, environmentally friendly, high in efficiency, economical, time-saving and easy to amplify. The method is not only used for widening the double-aqueous-phase system for extracting geniposide and improving the efficiency in separating and purifying geniposide, but also is used for extracting and producing other pigments.

The present invention discloses a preparing method of gardenia yellow pigment, which comprises the following steps: powder of gardenia fruit after being crashed is extracted in ethanol water in a super-sound reverse current way; filter liquid and filter residue are obtained by filtering after being extracted; the filter liquid is processed in a micro-filtration way, and then, is purified by macroporous resin to obtain gardenia yellow pigment solution; the ethanol content in the ethanol water is 40 % to 60%; a ratio of the powder to the ethanol water is 1kg to (5-7) L; and the temperature of the ethanol water is 47 to 53 DEG C. The titer of the gardenia yellow pigment obtained by the preparing method of gardenia yellow pigment is high.