CN101161731A - Method for preparing highly-dissolvable water-soluble monascus pigment - Google Patents
Method for preparing highly-dissolvable water-soluble monascus pigment Download PDFInfo
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- CN101161731A CN101161731A CNA2006100692934A CN200610069293A CN101161731A CN 101161731 A CN101161731 A CN 101161731A CN A2006100692934 A CNA2006100692934 A CN A2006100692934A CN 200610069293 A CN200610069293 A CN 200610069293A CN 101161731 A CN101161731 A CN 101161731A
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- soluble monascus
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Abstract
The invention discloses a preparation method of high solubility water-soluble red rice pigment. Red yeast rice is taken as major raw material which undergoes leaching through NaOH and alcohol solution, and the specific processes include soaking, filtering, concentrating, ultrafiltration and drying. The pigment provided by the invention has high color number, great dyeing power and high solubility. Furthermore, the pigment can be steadily dissolved in water with high hardness and can not settle down even if being heated to boil with clear and bright color.
Description
Technical field
The present invention relates to a kind of preparation method of monascorubin, particularly can stably be dissolved in the preparation method of the water-soluble red pigment of red rice of high hardness water.
Background technology
Food dye is foodstuffs industry, pharmaceutical industry and day indispensable class additive of chemical industry.In recent years, because safety issue, some synthetic colours no longer are applicable to foodstuffs industry.Therefore, the exploitation of natural pigment is subject to people's attention day by day.
Natural monascorubin is a class alcohol dissolubility pigment, and its main component is monascorubin and red colouring agent for food, also used as a Chinese medicine rubropunctatin, and they can only be dissolved in alcohols materials such as ethanol.
Japanese Patent (73 44880) discloses the patent application of water-soluble monascus pigment, utilize monascorubin and rubropunctatin and water soluble protein, polypeptide and amino acid effect, formation has the mixture of water dispersible, and its preparation process complexity might be introduced excessive impurity.
The patent No. be 93120954.4 patent of invention " preparation method of water-soluble monascus pigment " to have introduced with liquid submerged fermentation liquid be raw material, behind the filtering bacterial strain, adjust pH makes pigementation, removes clear liquid, uses alcohol immersion, adds Na
2The S precipitation is removed heavy metal, heats except that foreigh protein removing, leaches clear liquid again, concentrated at last, dry, abrasive dust.
The patent No. is 96122279.4 patent of invention " preparation method of water-soluble red pigment of red rice and yellow pigment ", and having introduced with monascorubin and red colouring agent for food, also used as a Chinese medicine rubropunctatin is that raw material passes through alkaline hydrolysis method production water colo(u)r.
Water-soluble monascus pigment by above-mentioned several patented inventions are produced owing to contain other impurity such as polysaccharide, albumen, uses the hard water heating for dissolving throw out to occur.The water-soluble monascus pigment of the present invention's preparation has remedied above-mentioned defective effectively.In hard water, can stablize the dissolved water-soluble monascus pigment for this, not appear in the newspapers yet so far.
Summary of the invention
The preparation method who the purpose of this invention is to provide a kind of water-soluble monascus pigment of high resolution effectively reduces the foreign matter content in the pigment, improves pigment purity, and product can stably be dissolved in the hard water.
Highly-dissolvable water-soluble monascus pigment preparation method of the present invention may further comprise the steps:
1, soak: the ethanolic soln (massfraction be 0.1%～95%) of 1 part Red kojic rice with 1～50 part mixed, add 0.1%～30% NaOH (quality with Red kojic rice is a benchmark), the three fully mixes, and soaks 0.1～3 hour, gets soak.
2, filter: the soak of step 1 is filtered by 10～500 purpose filter clothes, remove insolubles, collect clear liquid.
3, concentrate: the clear liquid of step 2 gained is carried out vacuum concentration, reclaim ethanol, obtain the concentrated solution of pigment.
4, ultrafiltration: with 1～100 times of step 3 gained concentrated solution dilute with water (being preferably 1～50 times), carry out membrane filtration then, collect filtrate.Described film is the organic membrane or the mineral membrane of interception rate 0.5 μ m～5000 molecular masses, and the best is the organic membrane or the mineral membrane of 0.22 μ m～10000.
5, drying: the filtrate of step 4 gained is carried out spraying drying, promptly get highly-dissolvable water-soluble monascus pigment.
Advantage of the present invention: when in hard water, heating according to the water-soluble monascus pigment of traditional method preparation, precipitation promptly occurs, highly-dissolvable water-soluble monascus pigment of the present invention is owing to adopt membrane filtration technique, remove other impurity such as polysaccharide, foreign protein, thoroughly solved a precipitation difficult problem.
Utilize the highly-dissolvable water-soluble monascus pigment of method preparation of the present invention, can be used as the tinting material of food.It can stably be dissolved in the water of various hardness.As food colorant the time, its consumption depend on the painted food kind of wanting and the color harmony intensity of the color that requires.It demonstrates absorption in ultraviolet-visible spectrum, the maximum absorption wavelength of its aqueous solution is 500nm.Change the potential of hydrogen of solution, can not change the tone of pigment.This pigment has goodish light, heat and metal ion stability.The present invention has removed impurity such as the polysaccharide in the pigment, albumen by ultra-filtration technique, makes pigment still can keep clear after the heated and boiled in hard water, and precipitation do not occur.This is the present not available character of other water-soluble monascus pigment.
Utilize the highly-dissolvable water-soluble monascus pigment of method preparation of the present invention to be used with other food colorant.This pigment can be applied in the numerous food, for example, and food such as candy, sour milk, fizz and effervescent beverage, fruit can, cake.
Embodiment
In order fully to disclose the preparation method of highly-dissolvable water-soluble monascus pigment of the present invention, illustrate below in conjunction with embodiment.
Embodiment 1: the preparation method of highly-dissolvable water-soluble monascus pigment
(1) 1 part Red kojic rice, 5% ethanolic soln with 30 parts is mixed, add 15% NaOH (quality with Red kojic rice is a benchmark), the three fully mixes, and soaks 0.2 hour.
(2) vat liquor is filtered with 50 order filter clothes, waste is collected filtrate.
(3) above-mentioned filtrate is carried out vacuum concentration, reclaim ethanol, obtain the concentrated solution of pigment.
(4), be that the film of 0.3um filters collection filtrate with the aperture then with 100 times of concentrated solution dilutions.
(5) filtrate of gained is carried out spraying drying, promptly get highly-dissolvable water-soluble monascus pigment.
Embodiment 2: the preparation method of highly-dissolvable water-soluble monascus pigment
(1) 1 part Red kojic rice, 8% ethanolic soln with 35 parts is mixed, add 20% NaOH (quality with Red kojic rice is a benchmark), the three fully mixes, and soaks 1 hour.
(2) vat liquor is filtered waste with 60 order filter clothes and collect filtrate.
(3) above-mentioned filtrate is carried out vacuum concentration, reclaim ethanol, obtain the concentrated solution of pigment.
(4), be that the film of 0.1um filters collection filtrate with the aperture then with 50 times of concentrated solution dilutions.
(5) filtrate of gained is carried out spraying drying, promptly get highly-dissolvable water-soluble monascus pigment.
Claims (3)
1. the preparation method of a highly-dissolvable water-soluble monascus pigment may further comprise the steps: soaks, filters, concentrates, dry, carry out ultrafiltration after it is characterized in that concentrating, and dry then; Described ultrafiltration is about to 1～100 times of concentrated solution dilute with water, carries out membrane filtration then; Described film is the organic membrane or the mineral membrane of interception rate 0.5 μ m～5000 molecular masses.
2. the preparation method of highly-dissolvable water-soluble monascus pigment according to claim 1 is characterized in that described ultrafiltration, is about to 1～50 times of concentrated solution dilute with water, carries out membrane filtration then.
3. the preparation method of highly-dissolvable water-soluble monascus pigment according to claim 1 and 2 is characterized in that described film is the organic membrane or the mineral membrane of interception rate 0.22 μ m～10000 molecular masses.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006100692934A CN101161731A (en) | 2006-10-10 | 2006-10-10 | Method for preparing highly-dissolvable water-soluble monascus pigment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006100692934A CN101161731A (en) | 2006-10-10 | 2006-10-10 | Method for preparing highly-dissolvable water-soluble monascus pigment |
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| Publication Number | Publication Date |
|---|---|
| CN101161731A true CN101161731A (en) | 2008-04-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNA2006100692934A Pending CN101161731A (en) | 2006-10-10 | 2006-10-10 | Method for preparing highly-dissolvable water-soluble monascus pigment |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101712824B (en) * | 2009-12-07 | 2012-07-04 | 杭州电子科技大学 | Preparation method of edible ink |
| CN102702780A (en) * | 2012-01-18 | 2012-10-03 | 天津天康源生物技术有限公司 | Method for preventing fading of monascus red pigment and application thereof |
| CN109627804A (en) * | 2019-01-18 | 2019-04-16 | 福州隆利信生物制品有限公司 | A kind of method that monascorubin extracts |
| CN113475666A (en) * | 2021-06-17 | 2021-10-08 | 广州工程技术职业学院 | Coloring composition and preparation method and application thereof |
-
2006
- 2006-10-10 CN CNA2006100692934A patent/CN101161731A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101712824B (en) * | 2009-12-07 | 2012-07-04 | 杭州电子科技大学 | Preparation method of edible ink |
| CN102702780A (en) * | 2012-01-18 | 2012-10-03 | 天津天康源生物技术有限公司 | Method for preventing fading of monascus red pigment and application thereof |
| CN109627804A (en) * | 2019-01-18 | 2019-04-16 | 福州隆利信生物制品有限公司 | A kind of method that monascorubin extracts |
| CN113475666A (en) * | 2021-06-17 | 2021-10-08 | 广州工程技术职业学院 | Coloring composition and preparation method and application thereof |
| CN113475666B (en) * | 2021-06-17 | 2024-05-28 | 广州工程技术职业学院 | Coloring composition and preparation method and application thereof |
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Open date: 20080416 |