Method for extracting natural dye from French parasol tree

A French sycamore and natural dye technology, applied in the field of natural dyes, can solve the problems of complex tannin pigment composition and cannot be used directly as dyes, etc., and achieve the effect of fast dyeing effect

Inactive Publication Date: 2007-02-14
青岛海联植物科技研究所 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem that the current extraction of tannin pigment components is complex and cannot be directly used as dyes and replace harmful chemical components in plant dyes, the present invention invents a technical solution for extracting permanent natural reactive dyes from sycamore bark ( light yellow and brown) method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Get 5 kilograms of collected sycamore bark, wash, dry and pulverize after drying at 60°C. Put it into a large bottle for leaching (do not use a metal container), add 30L of 40% ethanol aqueous solution, heat at 60°C for two hours, and let it stand overnight. Generally, it needs to be extracted 3-4 times until the color becomes lighter. The above extract is filtered and then concentrated under reduced pressure, and the concentrate is cooled to about 5-10°C and filtered. Dilute the filtrate with water, extract 3-4 times with n-butanol, concentrate part of the n-butanol under reduced pressure, and vacuum-dry to obtain a brown amorphous powder. After concentrating the mother liquor, pour it into a column equipped with a macroporous resin adsorption resin for column layer adsorption , sequentially eluted with 40-70% aqueous ethanol. These eluted solutions were respectively concentrated under reduced pressure (ethanol recovery). Put the concentrate into a drying tray, send...

Embodiment 2

[0026] Get 5 kilograms of collected sycamore bark, wash, dry and pulverize after drying at 60°C. Put it into a large bottle for leaching (do not use a metal container), add 30L of 60% ethanol aqueous solution, heat at 60°C for two hours, and let it stand overnight. Generally, it needs to be extracted 3-4 times until the color becomes lighter. The above extract is filtered and then concentrated under reduced pressure, and the concentrate is cooled to about 5-10°C and filtered. Dilute the filtrate with water, extract 3-4 times with n-butanol, concentrate part of the n-butanol under reduced pressure, and vacuum-dry to obtain a brown amorphous powder. After concentrating the mother liquor, pour it into a column equipped with a macroporous resin adsorption resin for column layer adsorption , sequentially eluted with 40-70% aqueous ethanol. These eluted solutions were respectively concentrated under reduced pressure (ethanol recovery). Put the concentrate into a drying tray, send...

Embodiment 3

[0031] Get 5 kilograms of collected sycamore bark, wash, dry and pulverize after drying at 60°C. Put it into a large bottle for leaching (do not use a metal container), add 30L of 95% ethanol aqueous solution, heat at 60°C for two hours, and let it stand overnight. Generally, it needs to be extracted 3-4 times until the color becomes lighter. The above extract is filtered and then concentrated under reduced pressure, and the concentrate is cooled to about 5-10°C and filtered. Dilute the filtrate with water, extract 3-4 times with n-butanol, concentrate part of the n-butanol under reduced pressure, and vacuum-dry to obtain a brown amorphous powder. After concentrating the mother liquor, pour it into a column equipped with a macroporous resin adsorption resin for column layer adsorption , sequentially eluted with 40-70% aqueous ethanol. These eluted solutions were respectively concentrated under reduced pressure (ethanol recovery). Put the concentrate into a drying tray, send...

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Abstract

The method of extracting natural dye from plane tree is to extract natural active dye from bark of plane tree containing resorin A type proanthocyanidin in 22-27 % possessing dyeing activity in the molecular weight range of 350-2000. By means of extracting, adsorbing, refining and other technological steps, coffee dye and pale yellow dye of purity over 90 % are prepared. The obtained dyes have high dyeing performance and high fastness on hair, wool and fabric, and will have raised use effect when being compounded with hydrolyzed tannin or flavone glycoside dye. The obtained dyes are used in dyeing hair, wool, fabric, etc.

Description

technical field [0001] The invention relates to the field of natural dyes, in particular to a technology for the extraction and dyeing performance of natural plant dyes. Background technique [0002] Currently, tannins are the main raw materials in the vegetable dyes used in the market. This kind of dyes are made of tannins obtained by direct water or organic solvent extraction. The composition is complex and the molecular weight range is too large. Or too small, the dyeing effect is poor, and the dyeing is not firm. In order to overcome these shortcomings, the vegetable tannin dye products used are all added with phenylenediamine and toxic heavy metal carcinogenic compounds. These substances are very harmful to the human body. Contents of the invention [0003] In order to solve the problem that the current extraction of tannin pigment components is complex and cannot be directly used as dyes and replace harmful chemical components in plant dyes, the present invention inv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09B61/00
Inventor 阿依别克.马力克
Owner 青岛海联植物科技研究所
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