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Method for extracting watermelon red coloring matter with assistance of floatation impurity removal

A technology for auxiliary extraction and red pigments, applied in chemical instruments and methods, azo dyes, organic dyes, etc., can solve the problems of reducing the food safety of pigments, high production costs, unfavorable health of production operators, etc., to reduce high temperature Pigment decomposition, low equipment requirements, bright color effect

Inactive Publication Date: 2015-11-11
LIUZHOU YINONG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The existing watermelon red pigment extraction process mainly has the following disadvantages: 1. Use chemical methods to remove impurities, the production cost is too high, and at the same time reduce the food safety of the pigment; 2. Some processes use toxic substances such as acetone, which is not conducive to the health of production operators

Method used

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  • Method for extracting watermelon red coloring matter with assistance of floatation impurity removal
  • Method for extracting watermelon red coloring matter with assistance of floatation impurity removal

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Embodiment 1: A method for floating and removing impurities to assist in extracting watermelon red pigment, the specific operation steps are as follows:

[0027] a. Take the flesh: take out the watermelon flesh from the fresh watermelon;

[0028] b. Beating: The watermelon pulp is broken into tissues to obtain pulp, and then the pulp is filtered to obtain watermelon juice, the filter mesh is 120-200;

[0029] c. Pigment extraction: add 65% ethanol solution to watermelon juice, the volume ratio of watermelon juice and ethanol solution is 1:2, immersion extraction 2-3 times;

[0030] d. Preparation of crude pigment: the extract is sent to the floater, and after the impurities are flocculated and floated, the impurities are scraped off to achieve solid-liquid separation; then the resulting separated liquid is vacuum concentrated, and the concentrate is freeze-dried to obtain crude pigment;

[0031] e. Pigment purification: prepare the crude pigment with distilled water to prepare 6....

Embodiment 2

[0033] Embodiment 2: A method for floating and removing impurities to assist in extracting watermelon red pigment, the specific operation steps are as follows:

[0034] a. Take the flesh: take out the watermelon flesh from the fresh watermelon;

[0035] b. Beating: The watermelon pulp is broken into tissues to obtain pulp, and then the pulp is filtered to obtain watermelon juice with a filter mesh of 200;

[0036] c. Pigment extraction: add 75% ethanol solution to watermelon juice, the volume ratio of watermelon juice and ethanol solution is 1:-3, immersion extraction 2-3 times;

[0037] d. Preparation of crude pigment: the extract is sent to the floater, and after the impurities are flocculated and floated, the impurities are scraped off to achieve solid-liquid separation; then the resulting separated liquid is vacuum concentrated, and the concentrate is freeze-dried to obtain crude pigment;

[0038] e. Pigment purification: the crude pigment is prepared with distilled water to prepare...

Embodiment 3

[0040] Example 3: The watermelon pulp was broken into tissues to obtain pulp slurry, and then the pulp pulp was filtered to obtain watermelon juice with a filter mesh of 120-200;

[0041] c. Pigment extraction: add 70% ethanol solution to watermelon juice, the volume ratio of watermelon juice and ethanol solution is 1:2.5, immersion extraction 3 times;

[0042] d. Preparation of crude pigment: the extract is sent to the floater, and after the impurities are flocculated and floated, the impurities are scraped off to achieve solid-liquid separation; then the resulting separated liquid is vacuum concentrated, and the concentrate is freeze-dried to obtain crude pigment;

[0043] e. Pigment purification: the crude pigment is prepared with distilled water to make 8.0g / L of crude pigment solution; flow through the macroporous adsorption resin column at a flow rate of 1.5ml / min for pigment adsorption; then use distilled water to perform the adsorption on the macroporous adsorption resin colum...

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Abstract

The invention belongs to the field of food coloring matter preparation, and provides a method for extracting watermelon red coloring matter with the assistance of floatation impurity removal. The method includes the steps of (a) flesh removal, (b) beating, (c) coloring matter extraction, (d) crude coloring matter preparation, (e) coloring matter purification, (f) concentration drying and the like. In crude coloring matter preparation, extraction liquid is delivered into a floatation device, impurities are scraped off after flocculating and floating, and solid-liquid separation is achieved; then, vacuum concentration is performed on obtained separation liquid, freeze-drying is performed on concentrate, and crude coloring matter is obtained. The method has the advantages that by the adoption of membrane filtration, the energy consumption is low, and the yield is high; besides, the whole production process is easy to implement, low in equipment requirement and cost and quite suitable for industrial production; the obtained coloring matter is safe to eat and good in color and luster.

Description

Technical field [0001] The invention belongs to the field of edible pigment preparation and relates to a method for extracting edible red pigment. Background technique [0002] Natural colorings are food colorings obtained from natural resources. Pigments extracted mainly from animal and plant tissues and microorganisms (cultivation), of which plant colorants account for the majority. Natural pigments not only have the function of coloring food, but also a considerable part of natural pigments have physiological activity. In terms of the development and application of natural pigments, Japan is at the forefront of the world. As early as 1975, the use of natural pigments exceeded that of synthetic pigments. my country's natural food coloring products have the largest output of sub-caramel coloring, and the annual output accounts for about 86% of the natural food coloring. It is mainly used in the domestic brewing industry and beverage industry. With the further improvement of p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09B61/00
CPCC09B61/00
Inventor 陈黔
Owner LIUZHOU YINONG TECH
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