Preparation technique of natural pigment from red jujube peel

A technology of natural pigments and red jujube peels, applied in natural dyes, azo dyes, organic dyes, etc., can solve the problems of dark product color, increase energy consumption, increase production cost, etc., to ensure chemical stability and improve product quality. , The effect of low production cost

Inactive Publication Date: 2010-07-21
YANTAI UNIV
View PDF3 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] (1) During the process of extracting jujube skin pigment by alkaline method, the pectin in the jujube skin is dissolved simultaneously, and the content of pectin impurities in the product is high, resulting in high viscosity of the pigment product, which is in a colloidal state, and is difficult to be made into a powder state;
[0005] (2) The temperature of the pigment extraction process is too high, which affects the stability of the pigment, and the color of the pigment product is dark, making it difficult to guarantee the quality of the pigment;
[0006] (3) After the pigment is extracted by the alkaline method, the pigment extract is concentrated to dryness by vacu

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
  • Preparation technique of natural pigment from red jujube peel
  • Preparation technique of natural pigment from red jujube peel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0016] The following is an example of this patent.

[0017] (1) Removing pectin: Weigh 50g jujube skin, put it in a 500mL conical flask, add 450mL distilled water, adjust the pH value to 1.75 with hydrochloric acid, put it in a water bath at 85°C, take it out after 2h, filter it with gauze, add 350mL of water for the second extraction of pectin. Filter with gauze, and wash the jujube skin with tap water until neutral.

[0018] (2) Alkaline extraction of pigment: put the degummed jujube skin in a 500mL beaker, add 500mL of 4% NaOH solution, stir and extract at room temperature for 24h, the filtrate obtained by gauze filtration is the first pigment extraction solution; add 500mL 4 to the filter residue % NaOH solution, stirred and extracted at room temperature for 24 hours, filtered through gauze to obtain the second pigment extract, and combined the two pigment extracts.

[0019] (3) Filtration: finely filter the pigment extract with filter paper to remove impurities such as ...

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 relates to a preparation technique of natural pigment from red jujube peel. Firstly, viscous pectin in a jujube peel is removed to ensure the powder state of a finished pigment product; extraction is carried out at room temperature to ensure the chemical stability and the natural state of the pigment product; and alkali dissolution and acid deposition are carried out with simple process and low cost. The preparation technique is characterized by comprising the following steps of: firstly, extracting and removing the pectin in the jujube peel by using an acid extraction method; then, extracting the jujube peel pigment with a water solution of sodium hydroxide at room temperature, and carrying out fine filtration to remove tiny peel dregs and other impurities from the pigment extracting solution; and finally, adding concentrated acid to deposit the pigment, centrifuging, cleaning the deposits with acidulous water to remove salts in the pigment, centrifuging and drying to obtain a pigment product.

Description

technical field [0001] The invention relates to a production method for separating and extracting natural jujube skin pigment from jujube skin, belonging to the technical field of biochemical industry. Background technique [0002] Jujube, also known as Chinese jujube, jujube, and Chinese jujube, is the fruit of the jujube tree of the genus Jujube in the family Rhamnaceae. There are more than 700 varieties of jujube trees in my country, the most famous of which are Jinsixiaozao, Dongzao, Beshanbanzao, Binxian Jinzao, Xinzheng Huizao, Lingbaozao, Zanhuangzao, Yunchengxiangzao, Jiaocheng Junzao, Taigu Huping Jujube, etc. Jujube is mainly produced in my country. At present, my country has more than 95% of jujube resources and jujube products in the world. Jujube is a food with the same origin as medicine and food, and its unique nutritional and medicinal value is attracting more and more people's attention, and the processed products of jujube are also becoming more and more a...

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
IPC IPC(8): C09B61/00
Inventor 常秀莲姜爱莉林剑
Owner YANTAI UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products