Water-soluble monascus red pigment and method for preparing same
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A technology for monascus red pigment and monascus red pigment, which is applied to chemical instruments and methods, azo dyes, organic dyes, etc., can solve the problems of high cost, complex process steps, environmental pollution, etc. Simple, versatile effects
Inactive Publication Date: 2018-10-26
ZAOZHUANG UNIV
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However, a large amount of chemical substances such as strong acid and strong alkali are also used, the cost is high, the environment is polluted, and the process steps are more complicated
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Embodiment 1
[0039] Step 1. The raw material is the alcohol-soluble monascus red pigment produced by the metabolism of Monascus bacteria. Its main components are erythematin and monascus red pigment. Its molecular structure is erythematin R=C 7h 15 , Monascus R=C 5 Hn.
[0040] Step 2, modification reaction, red yeast red pigment powder is diluted with pure water, add 3 kg of water for every 1 kg of red yeast rice pigment powder, stir evenly, add L-sodium glutamate or L-sodium aspartate, the ratio is 1 : 1, according to every 1kg monascus red pigment powder, add the mixture of 65g sodium glutamate and sodium aspartate, the preferred consumption is, ultrasonic stirring, keeping temperature is 55 ℃, and the reaction time is 5h.
[0041] Step 3, the precipitation is clarified, and after the reaction, it is allowed to stand at room temperature for 5 hours, and the supernatant is extracted and filtered to obtain a water-soluble monascus red pigment solution;
[0042] Step 4, concentrating, u...
Embodiment 2
[0045] Step 1. The raw material is the alcohol-soluble monascus red pigment produced by the metabolism of Monascus bacterium. Its main components are erythromycin and monascus red pigment. Its molecular structure is erythema pigment R=C 7 h 15 , Monascus R=C 5 Hn.
[0046] Step 2, modification reaction, red yeast red pigment powder is diluted with pure water, add 5kg of water for every 1kg of red yeast rice pigment powder, stir evenly, add L-sodium glutamate or L-sodium aspartate, or both The mixture in any ratio, the preferred ratio is 1:1, add 60g of the mixture of sodium glutamate and sodium aspartate per 1kg of monascus red pigment powder, stir ultrasonically, keep the temperature at 60°C, and react for 6h,
[0047] Step 3, the precipitation is clarified, and after the reaction, it is allowed to stand at room temperature for 3 hours, and the supernatant is extracted and filtered to obtain a water-soluble monascus red pigment solution;
[0048] Step 4, concentrating, usi...
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Abstract
The invention discloses a water-soluble monascus red pigment and a method for preparing the same. The method includes adding 3-5 kg of purified water into every 1 kg of monascus red pigment powder todilute the monascus red pigment powder, uniformly stirring the monascus red pigment powder and the purified water to obtain liquid, adding L-sodium glutamate or L-sodium aspartate or mixtures of the L-sodium glutamate and the L-sodium aspartate at optional proportions into the liquid, ultrasonically stirring the liquid, the L-sodium glutamate or the L-sodium aspartate or the mixtures, keeping thetemperature of 40-70 DEG C unchanged and carrying out reaction for 3-8 h. The preferable proportion of the L-sodium glutamate and the L-sodium aspartate in the mixtures is 1:1, 50-80 g of the mixturesof the L-sodium glutamate and the L-sodium aspartate are added into the liquid with every 1 kg of the monascus red pigment powder, the preferable usage of the mixtures is 65 g, the preferable temperature to be kept is 55 DEG C, and the preferable reaction time is 5 h. The water-soluble monascus red pigment and the method have the advantages that the method includes simple processes, chemicals such as acid, alkali and organic solvents are omitted, and the water-soluble monascus red pigment and the method are low in production cost and suitable for industrial production; the water-soluble monascus red pigment which is a product is high in purity and wide in application.
Description
technical field [0001] The invention relates to a modification preparation method of monascus red pigment which can be used in candies, beverages, fruit wines, cosmetics and pharmaceutical products. technical background [0002] Monascus pigment is a natural food coloring agent, among which red yeast rice, called Danqu in ancient times, is a traditional product in my country. Described and used as medicine. Red yeast rice is warm in nature, sweet in taste, non-toxic, enters the two meridians of the spleen and stomach, can invigorate the spleen, dry the stomach, and has the function of promoting blood circulation. It is produced in Fujian, Jiangxi, Guangdong, Shanghai, Jiangsu, Zhejiang and Taiwan in China, especially Fujian Gutian is the most famous. Red yeast rice is mainly obtained by inoculating steamed rice with Monascus and other strains and cultivating it. Monascus red pigment is the pigment produced by Monascus monascus mycelium, which contains six different compone...
Claims
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