Extraction method and application of safflower pigment

Abstract

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.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of pigment extraction, and particularly relates to a safflower pigment extraction method and application, and more particularly relates to a safflower pigment extraction method based on whey protein separation and application of safflower pigment. BACKGROUND

[0002] In recent years, the production of natural pigments in China has developed rapidly. However, due to the cost of consumption, the deep processing and fine processing of natural pigments in China are still scarce. Safflower is the dried flower of a plant in the Asteraceae family, which contains two pigments, safflower red pigment and safflower yellow pigment. In the prior art, the process for extracting safflower yellow pigment from safflower usually includes extraction, separation, purification and preparation. However, the extraction efficiency of safflower pigment obtained by this method is low (extraction rate less than 20%), the pigment stability is poor, only single pigment extraction is performed, and the utilization rate of safflower is low. SUMMARY

[0003] The present application aims to provide a safflower pigment extraction method and application, and aims to solve the technical problem of low extraction efficiency of safflower pigment in the prior art.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the present application is to provide a safflower pigment extraction method, characterized in that it comprises the following steps:

[0005] Preparation of safflower cooking liquid;

[0006] Add whey protein to the safflower cooking liquid and stir evenly;

[0007] Static stratification, remove the upper clear liquid, and then control the pH value of the mixed liquid; selective separation of safflower yellow pigment and red pigment is achieved by pH control; yellow pigment paste is obtained under alkaline conditions, and red pigment paste is obtained under acidic conditions;

[0008] Vacuum drying of the obtained yellow pigment paste and red pigment paste, and then grinding, wherein the drying temperature is 30-40℃;

[0009] Compounding with a color fixing agent to obtain a pigment paste.

[0010] Preferably, the control of the pH value of the mixed liquid comprises controlling the pH value of the mixed liquid by using white vinegar or / and citric acid.

[0011] Preferably, the control of the pH value of the mixed liquid comprises controlling the pH value of the mixed liquid by using baking soda.

[0012] Preferably, the vacuum drying of the obtained yellow pigment mud and red pigment mud, and then grinding, comprises: the drying temperature is 35℃.

[0013] Preferably, the vacuum drying of the obtained yellow pigment mud and red pigment mud, and then grinding, comprises: the grinding is carried out in the light-proof condition.

[0014] Preferably, the static stratification, removing the supernatant, and then controlling the pH value of the mixed solution; the selective separation of safflower yellow pigment and red pigment is realized through the pH control, comprising:

[0015] The mixed solution is subjected to static stratification, and then the solution is adjusted to be alkaline; the lower precipitate is filtered through filter paper, and the yellow pigment mud is obtained on the filter paper.

[0016] Then, the pH value of the solution is adjusted to 4-6.5; the lower precipitate is filtered through filter paper, and the red pigment mud is obtained on the filter paper.

[0017] Preferably, the adding of whey protein to the safflower boiling solution and stirring uniformly comprises: adding milk to the safflower boiling solution; or / and adding whey protein powder to the safflower boiling solution.

[0018] The safflower pigment prepared by the safflower pigment extraction method according to any one of the above is applied to clothing, cultural and creative products, and plant dyeing crafts.

[0019] The safflower pigment extraction method provided by the application has the beneficial effects that: compared with the prior art, the safflower pigment extraction method breaks through the limitation of single pigment extraction by realizing the selective separation of safflower yellow / red pigment through the control of the pH value; and the weather resistance of the product is effectively improved through the low-temperature grinding and the fixing agent compounding and coating process. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description only some embodiments of the application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0021] Figure 1 A flow chart of a safflower pigment extraction method is shown;

[0022] Figure 2 A yellow bed sheet made of safflower pigment prepared by the safflower pigment extraction method is shown;

[0023] Figure 3A yellow hair band made of safflower pigment prepared by the safflower pigment extraction method is shown;

[0024] Figure 4 A red bed sheet made of safflower pigment prepared by the safflower pigment extraction method is shown.

[0025] Figure 5 A red hair band made of safflower pigment prepared by the safflower pigment extraction method is shown. DETAILED DESCRIPTION

[0026] In order to make the technical problems to be solved by the present application, the technical solutions and beneficial effects clearer, the present application will be further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application and do not limit the present application.

[0027] Please refer to Figures 1 to 5 , a safflower pigment extraction method provided by the present application will be described. The safflower pigment extraction method comprises the following steps:

[0028] Step S1, preparing safflower boiling liquid;

[0029] In this step, the safflower needs to be dried in advance. Then, 1 part of safflower and 4 parts of water are taken in weight ratio, and boiled for 30 min. When the liquid color of the safflower of the current year becomes orange red or the liquid color of the safflower of long years presents red brown, it can enter the next step processing.

[0030] Step S2, adding whey protein to the safflower boiling liquid and stirring uniformly;

[0031] In this step, the implementation process of adding whey protein to the safflower boiling liquid can be: adding milk to the safflower boiling liquid. It can also be: adding whey protein powder to the safflower boiling liquid.

[0032] The specific implementation process can be: 150 ml of needle tube is filled with whey protein liquid, and is sprayed towards 500 ml of safflower boiling liquid after filtering treatment. The safflower liquid will appear foam phenomenon immediately, and then a glass test tube is used to fully stir the whey protein and the safflower boiling liquid to make them fully blend. After standing for 10 minutes, a piece of clean filter paper is taken to scrape off the upper layer of the solution.

[0033] In this step, the mass ratio of whey protein to safflower boiling liquid is: 1-5:10, preferably: 3:10.

[0034] Step S3, the pH value of the mixed solution is regulated; the selective separation of safflower yellow / red pigment is realized by pH control. Specifically, static stratification is performed, and then the upper clear liquid is removed, and yellow pigment mud and red pigment mud are obtained by regulating the pH value of the lower precipitate; more specifically, when the pH value of the mixed solution is > 7, it is alkaline, and at this time, the extracted safflower pigment is yellow. When the pH value of the mixed solution is less than 7, it is acidic, and at this time, the extracted safflower pigment is red.

[0035] The specific implementation process of this step is as follows:

[0036] Step S3.1, the mixed solution is subjected to static stratification, and then the solution is adjusted to be alkaline, and the lower precipitate is filtered through filter paper, and then suction filtration is performed, and the yellow pigment mud is left on the filter paper;

[0037] Step S3.2, the solution is adjusted to be acidic (pH value is greater than 4 and less than 7, preferably between 4-6.5), and the lower precipitate is filtered through filter paper, and then suction filtration is performed, and the red pigment mud is left on the filter paper.

[0038] Step S4, the obtained yellow pigment mud and red pigment mud are vacuum dried and low-temperature ground; wherein the drying temperature is 30-40℃. The drying temperature is preferably 35℃. The grinding is performed in the dark. The yellow pigment mud and the red pigment mud are completely dried, and then the color mud block is put into a grinding mortar and crushed into powder, and then the color powder meeting the requirements is screened out through an 800-1500 mesh screen.

[0039] The method further comprises configuring a pigment paste. Specifically, a fixing agent is used for compounding to obtain a pigment paste. The fixing agent is a three-oil medium, which is used to coat the pigment crystal, and the three-oil medium is composed of linseed oil, turpentine oil and dammar resin, and the ratio of linseed oil, turpentine oil and dammar resin is 3:1:1 (w / w).

[0040] Specifically, the screened color powder is placed on a grinding plate and ground with a grinding pestle, and the oil painting medium is placed in the oil painting medium for grinding, and the watercolor medium is placed in the watercolor medium for grinding, thereby obtaining the pigment paste.

[0041] Compared with the prior art, the method for extracting safflower pigment provided by the application realizes selective separation of safflower yellow / red pigment by regulating the pH value, breaks through the limitation of single pigment extraction, effectively improves the weather resistance of the product through low-temperature grinding and fixing agent compounding coating process, and has the characteristics of ecological safety and strong light resistance.

[0042] The application of the safflower pigment extraction method according to any one of the above in clothing, creative products and plant dyeing crafts. Specifically, the application in clothing specifically includes one or more of silk dyeing, cashmere dyeing and home decoration dyeing. The application in creative products specifically includes one or more of handmade paper dyeing and mineral pigment blending. The application in plant dyeing crafts specifically includes one or more of tie-dye crafts and batik crafts.

[0043] Embodiment 1

[0044] A safflower pigment extraction method, comprising the following steps:

[0045] Preparation of safflower decoction;

[0046] Adding milk to the safflower decoction and stirring uniformly.

[0047] Static stratification, then removing the supernatant, and obtaining yellow pigment mud and red pigment mud by adjusting the pH value of the lower sediment, specifically, adjusting the pH value of the mixed solution by white vinegar and baking soda. When the pH value of the mixed solution is > 7, it is alkaline, and the extracted safflower pigment is yellow at this time. When the pH value of the mixed solution is less than 7, it is acidic, and the extracted safflower pigment is red at this time. More specifically, the mixed solution is subjected to static stratification, then the solution is adjusted to be alkaline by baking soda, the lower sediment is filtered through filter paper, and the yellow pigment mud is obtained. The solution is adjusted to be acidic (pH value between 4-6.5) by white vinegar, the lower sediment is filtered through filter paper, and the red pigment mud is obtained.

[0048] The obtained yellow pigment mud and red pigment mud are subjected to vacuum drying treatment and low-temperature grinding, respectively. The drying temperature is 35℃. The grinding is carried out in the dark.

[0049] Embodiment 2

[0050] A safflower pigment extraction method, comprising the following steps:

[0051] Preparation of safflower decoction;

[0052] Adding milk to the safflower decoction and stirring uniformly.

[0053] The static stratification is then removed from the supernatant, and the pH value of the lower layer of the precipitate is adjusted to obtain yellow pigment mud and red pigment mud, respectively. Specifically, the pH value of the mixed solution is adjusted by citric acid (0.2 g / L) and baking soda. When the pH value of the mixed solution is >7, it is alkaline, and the extracted safflower pigment is yellow. When the pH value of the mixed solution is <7, it is acidic, and the extracted safflower pigment is red. More specifically, the mixed solution is subjected to static stratification, and then the solution is made alkaline by baking soda. The lower layer of the precipitate is filtered through filter paper, and the yellow pigment mud is obtained. The solution is made acidic (pH value between 4-6.5) by citric acid (0.2 g / L), and the lower layer of the precipitate is filtered through filter paper, and the red pigment mud is obtained.

[0054] The obtained yellow pigment mud and red pigment mud are vacuum dried and low-temperature ground. The drying temperature is 35°C.

[0055] Example 3

[0056] A method for extracting safflower pigment, comprising the following steps:

[0057] Preparation of safflower cooking liquid;

[0058] Adding whey protein powder (0.5 g / L) to the safflower cooking liquid and stirring uniformly.

[0059] The static stratification is then removed from the supernatant, and the pH value of the lower layer of the precipitate is adjusted to obtain yellow pigment mud and red pigment mud, respectively. Specifically, the pH value of the mixed solution is adjusted by citric acid (0.2 g / L) and baking soda. When the pH value of the mixed solution is >7, it is alkaline, and the extracted safflower pigment is yellow. When the pH value of the mixed solution is <7, it is acidic, and the extracted safflower pigment is red. More specifically, the mixed solution is subjected to static stratification, and then the solution is made alkaline by baking soda. The lower layer of the precipitate is filtered through filter paper, and the yellow pigment mud is obtained. The solution is made acidic (pH value between 4-6.5) by citric acid (0.2 g / L), and the lower layer of the precipitate is filtered through filter paper, and the red pigment mud is obtained.

[0060] The obtained yellow pigment mud and red pigment mud are vacuum dried and low-temperature ground. The drying temperature is 35°C.

[0061] The technical solutions disclosed and presented in the present application can be realized by the technical personnel in the field through referring to the content of the present application and appropriately changing the conditional routes and other links. Although the method and preparation technology of the present application have been described through preferred examples, the relevant technical personnel can obviously modify or recombine the method and technical route described in the present application without departing from the content, spirit and scope of the present application, to realize the final preparation technology. It is particularly pointed out that all similar substitutions and modifications are obvious to the technical personnel in the field, and they are all regarded as being included in the spirit, scope and content of the present application. That is, the above-mentioned is only the preferred examples of the present application, and is not used to limit the present application. Any modification, equivalent substitution and improvement and the like within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A method for extracting safflower pigment, characterized in that, Includes the following steps: Preparation of safflower decoction; Add whey protein to the safflower decoction and stir well; The mixture is allowed to stand still and separate into layers. The supernatant is removed, and then the pH of the mixture is adjusted. Selective separation of safflower yellow and red pigments is achieved through pH control. Yellow pigment mud is obtained under alkaline conditions, and red pigment mud is obtained under acidic conditions. The obtained yellow and red clay were vacuum dried and then ground, with the drying temperature ranging from 30 to 40°C.

2. The method for extracting safflower pigment as described in claim 1, characterized in that, The pH adjustment of the mixture includes adjusting the pH of the mixture by using white vinegar and / or citric acid.

3. The method for extracting safflower pigment as described in claim 2, characterized in that, The pH adjustment of the mixture includes adjusting the pH of the mixture by using baking soda.

4. The method for extracting safflower pigment as described in claim 3, characterized in that, The process involves vacuum drying of the obtained yellow and red clay, followed by grinding, including a drying temperature of 35°C.

5. The method for extracting safflower pigment as described in claim 4, characterized in that, The process of vacuum drying the obtained yellow and red clay and then grinding them includes grinding under light-protected conditions.

6. A method for extracting safflower pigment as described in any one of claims 1 or 5, characterized in that, The static stratification process involves removing the supernatant and then adjusting the pH of the mixture. Selective separation of safflower yellow and red pigments is achieved through pH control, including: The mixture was allowed to stand and separate into layers. The solution was then prepared to be alkaline. The lower precipitate was passed through filter paper and filtered. What remained on the filter paper was yellow pigment mud. Adjust the pH of the prepared solution to between 4 and 6.5, pass the lower precipitate through filter paper, and filter by suction. What remains on the filter paper is red pigment mud.

7. The method for extracting safflower pigment as described in claim 1, characterized in that, The addition of whey protein to the safflower decoction and stirring until homogeneous includes: adding milk to the safflower decoction; and / or adding whey protein powder to the safflower decoction.

8. The application of safflower pigment prepared by the safflower pigment extraction method according to any one of claims 1-7 in clothing, cultural and creative products and plant-dyed handicrafts.

Images