Method for preparing highly-dissolvable water-soluble monascus pigment

A kind of monascus pigment, high solubility technology, applied in the field of preparation of water-soluble monascus red pigment

Inactive Publication Date: 2008-04-16
FUJIAN AGRI & FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For this water-soluble monascus pigment that can be stably dissolved in hard water, there has been no report so far

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment 1: the preparation method of highly soluble water-soluble monascus pigment

[0020] (1) Mix 1 part of red yeast rice with 30 parts of 5% ethanol solution, add 15% NaOH (based on the quality of red yeast rice), fully stir and mix the three, and soak for 0.2 hours.

[0021] (2) Filter the extract with a 50-mesh filter cloth, and discard the residue to collect the filtrate.

[0022] (3) The above-mentioned filtrate is vacuum-concentrated, ethanol is recovered, and the concentrate of the pigment is obtained.

[0023] (4) Dilute the concentrated solution 100 times, then filter it with a membrane with a pore size of 0.3um, and collect the filtrate.

[0024] (5) Spray-dry the obtained filtrate to obtain highly soluble water-soluble monascus pigment.

Embodiment 2

[0025] Embodiment 2: the preparation method of highly soluble water-soluble Monascus pigment

[0026] (1) Mix 1 part of red yeast rice with 35 parts of 8% ethanol solution, add 20% NaOH (based on the quality of red yeast rice), fully stir and mix the three, and soak for 1 hour.

[0027] (2) Filter the extract with a 60-mesh filter cloth and discard the residue to collect the filtrate.

[0028] (3) The above-mentioned filtrate is vacuum-concentrated, ethanol is recovered, and the concentrated solution of the pigment is obtained.

[0029] (4) Dilute the concentrated solution 50 times, then filter it with a membrane with a pore size of 0.1um, and collect the filtrate.

[0030] (5) Spray-dry the obtained filtrate to obtain highly soluble water-soluble monascus pigment.

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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 [0001] The invention relates to a preparation method of monascus red pigment, in particular to a preparation method of water-soluble monascus red pigment which can be stably dissolved in high hardness water. Background technique [0002] Food coloring is an indispensable additive in food industry, pharmaceutical industry and daily chemical industry. In recent years, some synthetic pigments are no longer suitable for use in the food industry due to safety concerns. Therefore, the development of natural pigments has been paid more and more attention by people. [0003] Natural monascus pigment is a kind of alcohol-soluble pigment, and its main components are monascus rubin and monascus erythrophyll, which can only be dissolved in alcohols such as ethanol. [0004] Japanese patent (73 44880) discloses a patent application for water-soluble monascus pigment, utilizes monascus rubin and erythematin to interact with water-soluble proteins, polypeptides and amino ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09B61/00
Inventor 甘纯玑简文杰管永光刘玉华杨海花
Owner FUJIAN AGRI & FORESTRY UNIV
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