Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for preparing water-soluble acid-resisting monascus pigment

A technology of monascus red pigment and water-solubility, which is applied in the field of preparation of water-soluble acid-resistant monascus red pigment, can solve problems such as complex preparation process, and achieve the effects of easy availability of raw materials, easy products and simple process

Inactive Publication Date: 2012-01-18
FUJIAN AGRI & FORESTRY UNIV
View PDF6 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Japanese patent (73 44880) discloses a patent application for a water-soluble monascus pigment, which uses the interaction of monascus rubin and erythematin with water-soluble proteins, polypeptides and amino acids to form a water-dispersible complex, and the preparation process is complicated , it is possible to introduce excess impurities

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for preparing water-soluble acid-resisting monascus pigment
  • Method for preparing water-soluble acid-resisting monascus pigment
  • Method for preparing water-soluble acid-resisting monascus pigment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Weigh 10g of alcohol-soluble monascus red pigment powder, add 10mL of 10% NaOH solution, stir evenly, and react at 10°C under normal pressure for 2h. After the reaction, add 1.5mL of glacial acetic acid and 4.5μL of concentrated sulfuric acid to the reaction solution Stir evenly, let stand at room temperature for 12 hours, add 120ml of distilled water to stir after the reaction, let stand to precipitate, filter to collect the precipitate, add 1.5mL of propylene oxide, react at 10°C for 12 hours, after drying, you can get the prepared Water-soluble acid-resistant monascus red pigment.

Embodiment 2

[0033] Weigh 10g alcohol-soluble monascus red pigment powder, add 50mL 30% Na 2 CO 3 After the solution was stirred evenly, react at 50°C under normal pressure for 1 hour; after the reaction, add HCl solution to neutralize, then add 1.5mL propionic acid and 4.5μL concentrated hydrochloric acid to the reaction solution, stir evenly, and let stand at room temperature for 12h , After the reaction is completed, add 120ml of distilled water and stir, let stand to precipitate; filter to collect the precipitate, add 30mL of ethylene oxide, react at 30°C for 6h, after drying, the prepared water-soluble acid-resistant monascus red pigment can be obtained.

Embodiment 3

[0035] Weigh 10g alcohol-soluble monascus red pigment powder, add 40mL 30% NaHCO 3 solution, stirred evenly, and reacted at 90°C under normal pressure for 1 hour; after the reaction, neutralized by adding HCl solution, then added 45mL of 2-methylpropionic acid and 125μL of nitric acid to the reaction solution, stirred evenly, and refluxed at 100°C for 0.5 h, after the reaction is completed, add 120ml of distilled water and stir, let stand to precipitate; filter to collect the precipitate, add 10mL of butylene oxide, react at 60°C for 0.5h, after drying, you can get the prepared water-soluble acid-resistant Monascus Red pigment.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a method for preparing a water-soluble acid-resisting monascus pigment. In the method, the water-soluble acid-resisting monascus pigment is prepared by performing alkaline hydrolysis, hydroxyl esterification, drying and smashing on an alcohol-soluble monascus pigment which is produced through metabolism of monascus purpureus and serves as a raw material. The pigment can be dissolved in water and various organic solvents of different pH ranges, has high thermal stability, is not influenced at the temperature 0-120 DEG C, has high stability at pH being more than 1, and is stable to metal ions; and oxidants and reduction agents do not have any side effect on the pigment, glucose and cane sugar solutions do not have any influence on the pigment, and the quality of the pigment is not influenced basically by the use of various common food additives. The water-soluble acid-resisting monascus pigment can be applied to various food, and can be used together with other food coloring agents in a matching way.

Description

technical field [0001] The invention relates to a preparation method of water-soluble acid-resistant monascus red pigment. Background technique [0002] Monascus pigment is a metabolite obtained from food as raw material through the cultivation process of Monascus. The basic raw materials are sufficient to meet the needs of large-scale production. [0003] The well-known monascus pigment is a kind of alcohol-soluble pigment, and its main components are erythematin and monascus rubin, and its molecular structure is: [0004] [0005] Among them, erythematin: R=C 7 h 15 , Monascus rubin: R=C 5 h 11 . The ingredient is red in color and is poorly soluble in water. [0006] Japanese patent (73 44880) discloses a patent application for a water-soluble monascus pigment, which uses the interaction of monascus rubin and erythematin with water-soluble proteins, polypeptides and amino acids to form a water-dispersible complex, and the preparation process is complicated , it ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C09B57/00
Inventor 甘纯玑谢苗杜佩云
Owner FUJIAN AGRI & FORESTRY UNIV