JPS60206871A - Production of safflower red - Google Patents

Abstract

PURPOSE:To obtain a safflower red powder which has a high purity and good stability, by adding cellulose to a solution mixture contg. safflower red and safflower yellow to selectively adsorb the red dye on cellulose. CONSTITUTION:Crushed dry safflower is immersed in water to dissolve out most of yellow dye (safflower yellow). A solid (residue obtd. after dissolving safflower) is recovered and then immersed in an org. solvent to dissolve red dye (carthamin). Crystalline cellulose powder is added to the resulting extract (contg. a small) quantity of yellow dye) and the mixture is stirred to selectively adsorb the red dye. The cellulose powder is recovered by filtration and washed with water to remove the yellow dye deposited thereon. The resulting cellulose powder is dried at a low temp. to obtain a red powder composed of cellulose contg. the red dye deposited thereon.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for producing red pigment from safflower.

Safflower contains 0.4 to 0 red pigment (cartamine)
6% and yellow pigment (sunflower yellow) 28-36
Safflower yellow pigment is said to contain %.
Because it is scientifically stable and easy to produce, it is used as a relatively inexpensive natural pigment for food coloring.However, as mentioned above, safflower red pigment contains only a small amount of safflower and contains flavonoids. It is the most scientifically unstable of all pigments, and its color changes and fades due to the influence of heat, light, air, etc., so manufacturing is a factor, which naturally increases costs, and the product has a high degree of sensibility.
``There was a time when beni 1 was used as a high-grade coloring agent for dyeing and cosmetics, but today, cheap and stable red pigments have become widespread, and safflower red pigment became impractical.

However, the inventor discovered that by adding cellulose to a mixed solution of safflower red pigment and safflower yellow pigment, only the red pigment was selectively adsorbed to cellulose and stabilized in that state.

That is, a dried and crushed safflower is immersed in water to elute most of the yellow pigment, and an organic solvent is added to the remainder to extract the red pigment. Then, crystalline cellulose was added to this extract.
By stirring, only the red pigment is selectively adsorbed, leaving a considerable amount of the yellow pigment remaining in the extract. Then, by filtering the liquid, removing the liquid, and drying, a bright red powder with a good color tone can be obtained.

It can be seen from FIGS. 1 to 4 that the red dye prepared above has high purity and high stability. In this figure, the horizontal axis shows wavelength and the vertical axis shows absorbance.

FIG. 1 shows the absorbance curve of purified safflower extract.

In this case, in addition to the red dye absorption (516 to 518 nm), the yellow dye has strong absorption (406 to 4 oz. nm).

FIG. 2 shows the absorbance curve of a solution in which the red dye adsorbed on crystalline cellulose was eluted with 50% acetone.

In this case, absorption of oxygen (522 nn) is noticeable, and absorption of yellow dye is hardly observed. (Note: The maximum adsorption wavelength differs from that in Figure 1 due to the difference in solvent.

The solvent in Figure 1 is ethanol. ) Figure 3 shows the absorbance curve after the purified safflower extract was stored indoors for two weeks.

In this case, absorption of the red pigment has almost disappeared.

FIG. 4 shows an absorbance curve after a red dye solution adsorbed on crystalline cellulose was stored indoors for two weeks.

In this case, a stable state was observed in which the absorption of the red dye did not change at all.

As described above, according to the present invention, a stable red pigment could be obtained by an extremely simple operation of adding crystalline cellulose to a pigment liquid extracted from safflower and stirring.

In addition, the crystalline cellulose used here is a natural plant va
Since the red pigment obtained by the method of the present invention can be used in foods, the uses of the safflower red pigment can be expanded.

In step 11, 100 g of dried safflower is ground, degreased with an organic solvent such as ether or hexane, and dried.

Add 1 liter of ethanol and adjust by adding water so that the ethanol content of the solution is 80%.

After exchanging the air with N2 gas, extract the red pigment while stirring (this is because red pigments easily discolor and fade under the influence of heat, light, and air).

Filter the extract and wash the remaining residue with 0.5 liters of ethanol.

This filtrate and cleaning solution were combined at 40°C in a N2 gas stream.
In the following, ethanol is evaporated to obtain a concentrated liquid.

Crystalline cellulose 150 was added to this concentrated liquid (150cc), stirred in a N2 gas stream, the red pigment was adsorbed to the crystalline cellulose, then filtered, and water was added to the residue in a colander and stirred to remove the adhesion. Excludes yellow pigment.

Dry at low temperature to obtain a red powder.

The obtained red dye yield was 15Q, and the wavelength was 522nun.
The color value was 20.0.

[Brief explanation of the drawing]

Figure 1 shows the absorbance curve of purified safflower extract. Figure 2 shows the absorbance curve of a solution in which red dye adsorbed on crystalline cellulose was eluted with 50% acetone. Figure 3 shows the absorbance curves of the extracted and purified solution, and Figure 4 shows the acetone solution of the red dye adsorbed on crystalline cellulose, each stored under indoor scattered light for two selections. Procedural Amendment May 2, 1980 Director of the Patent Office Kazuo Wakasugi 1, Indication of the Case 1981 Patent Application No. 60902 2, Name of the Invention: Safflower Red Pigment! ! J Construction Method 3, Relationship with the case of the person making the amendment Name of patent applicant: Japan Chlorophyll Co., Ltd. 6, Subject of amendment Description 1, Title of the invention Method for producing safflower red pigment 2, Claims of safflower A patented method for producing red pigment from safflower that is obtained by adding cellulose to an extracted and purified liquid and adsorbing only the red pigment. 3. Detailed description of the invention The present invention relates to a method for producing red pigment from safflower. Safflower contains 0.4 to 0 of the red pigment (carthamine).
6% and yellow pigment (?7 raw yellow) 28-36%
However, safflower yellow pigment is chemically stable and easy to manufacture, so it is relatively cheap.
It is used as an i-natural natural pigment to color food, etc.
As mentioned above, the content of safflower red pigment in safflower is small, and it is the most scientifically unstable among the flavonoid pigments, and its color changes and fades under the influence of heat, light, air, etc., making it difficult to manufacture. Naturally, the cost is high and the product is prone to fading, so there was a time when it was used for dyeing as ``beni'' or as a high-grade coloring agent for cosmetics, but today it is cheaper and more stable. Red pigments became popular, and safflower red pigments became less practical. However, the inventor discovered that by adding cellulose to a mixed solution of safflower red pigment and safflower yellow pigment, only the red pigment was selectively adsorbed to cellulose and stabilized in that state. That is, a dried and crushed safflower is immersed in water to elute most of the yellow pigment, and an organic solvent is added to the remainder to extract the red pigment. After step 1, add crystalline cellulose to this extract.
By stirring, only the red pigment is selectively adsorbed, leaving a considerable amount of the yellow pigment remaining in the extract. Then, by filtering the liquid, removing the liquid, and drying, a bright red powder with a good color tone can be obtained. It can be seen from FIGS. 1 to 4 that the red dye obtained as described above has high purity and high stability. In this figure, the horizontal axis shows wavelength and the vertical axis shows absorbance. FIG. 1 shows the absorbance curve of the safflower extract Ill solution. In this case, absorption of red dye (516-518nm) j
It has strong absorption (406-407 nm) in addition to yellow pigments. Figure 2 shows 2F! red pigment adsorbed on crystalline cellulose eluted with 50% acetate! The absorbance curve of 'a is shown. In this case, the absorption of L1 element (522 nm) is noticeable, and the absorption of yellow element is hardly observed.The reason why the maximum wavelength of NL adsorption is different from that in FIG. 1 is due to the difference in solvent. The solvent in Figure 1 is ethanol. ) Figure 3 shows safflower extract lees
The absorbance curve after storing J solution indoors for 2 weeks is shown. In this case, the absorption of the red pigment has almost completely disappeared. A stable state was observed in which the absorption did not change at all.As mentioned above, according to the present invention, a stable red pigment can be produced by adding crystalline cellulose to a pigment liquid extracted from safflower and stirring it. In addition, the crystalline cellulose used here is made from natural plant ta
Since the red pigment obtained by the method of the present invention can be used in foods, the uses of safflower red pigment can be expanded. Then, degrease and dry with an organic solvent such as ether or hexane. Add 1 liter of ethanol and evaporate the solution into an ethanol ram.
Add water to adjust to 80%. After replacing the air with N 2 gas, extract the red pigment while stirring (this is because red pigments tend to discolor and fade under the influence of heat, light, and air). Filter the extract and wash the residue with 0.5 liters of ethanol. The filtrate and washing solution are combined and the ethanol is evaporated at 40° C. or below in a N gas stream to obtain an infusion solution. Add 15 g of crystalline cellulose to this concentrate (150 cc), stir in a N gas stream to adsorb the red pigment to the crystalline cellulose, then filter, add water to the residue in a colander, stir, and remove the attached yellow pigment. Excludes pigment. Dry at low temperature and coat with red powder. The red dye yield obtained was 15 (J) and the wavelength was 522 nl.
The color value at ll was 20.0. 4. Brief explanation of the drawings Figure 1 shows the absorption trace curve of purified safflower extract. Figure 2 shows the absorbance curve of a solution in which red dye adsorbed on crystalline cellulose was eluted with 50% acetone. Figure 3 shows the extracted and purified liquid in a 2゛ρ chamber and acetone.
The sucking

Claims (1)

[Claims] A patented method for producing safflower red pigment, which is obtained by adding cellulose to a purified safflower extract and adsorbing only the red pigment.