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Method for extracting brown pigment of chestnut shells by using ultrasonic waves

A chestnut shell, ultrasonic technology, applied in chemical instruments and methods, azo dyes, organic dyes and other directions, can solve the problems of low quality, many impurities, waste, etc., to improve the number of recycling, the extraction process is simple, and the quality excellent effect

Inactive Publication Date: 2013-01-16
湖北紫鑫生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing extraction methods have the following problems: the extraction rate of chestnut shell brown pigment is low, resulting in a large waste; the extract has poor water solubility, more impurities, and is prone to pollution; the extracted chestnut shell brown pigment has low purity and low quality

Method used

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  • Method for extracting brown pigment of chestnut shells by using ultrasonic waves

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Effect test

Embodiment 1

[0026] The chestnut shells are dried in an oven until the moisture content is 10%, and then pulverized, and the pulverized chestnut shells are passed through a 60-mesh sieve, and the flocs in the shells are removed. Mix the processed chestnut shell powder with ethanol-sodium hydroxide extractant in a ratio of 1:15 (w / v), and perform the first leaching at a temperature of 70°C and an ultrasonic power of 500w. The time is 2 hours. After standing and filtering, save the first extract, and mix the filter residue with the ethanol-sodium hydroxide extracting agent in a ratio of 1:10 (w / v). Carry out the leaching for the second time under, the leaching time is 1 hour. After static filtration, the two extracts were combined, filtered through a 200-mesh filter cloth, and the filtrate was concentrated under reduced pressure at 40°C and 0.1 MPa. Pump the concentrated pigment solution into the DA-201 macroporous resin column at a flow rate of 3.6ml / min, and elute the chestnut shell brow...

Embodiment 2

[0028] The chestnut shells are dried in an oven until the water content is 8%, and then pulverized, and the pulverized chestnut shells are passed through a 50-mesh sieve, and the flocs in the shells are removed. Mix the processed chestnut shell powder with ethanol-sodium hydroxide extractant in a ratio of 1:20 (w / v), and perform the first leaching at a temperature of 60°C and an ultrasonic power of 400w. The time is 1.5 hours. After standing and filtering, save the first extract, and mix the filter residue with the ethanol-sodium hydroxide extracting agent in a ratio of 1:10 (w / v). Carry out the leaching for the second time under, the leaching time is 1 hour. After static filtration, the two extracts were combined, filtered through a 200-mesh filter cloth, and the filtrate was concentrated under reduced pressure at 40°C and 0.1 MPa. Pump the concentrated pigment solution into the DA-201 macroporous resin column at a flow rate of 3.6ml / min, and elute the chestnut shell brown ...

Embodiment 3

[0030] The chestnut shells are dried in an oven until the moisture content is 10%, and then pulverized, and the pulverized chestnut shells are passed through a 60-mesh sieve, and the flocs in the shells are removed. Mix the processed chestnut shell powder with ethanol-sodium hydroxide extractant in a ratio of 1:20 (w / v), and perform the first leaching at a temperature of 60°C and an ultrasonic power of 500w. The time is 2 hours. After standing and filtering, save the first extract, and mix the filter residue and ethanol-sodium hydroxide extractant in a ratio of 1:10 (w / v) evenly. Carry out the leaching for the second time under, the leaching time is 1 hour. After static filtration, the two extracts were combined, filtered through a 200-mesh filter cloth, and the filtrate was concentrated under reduced pressure at 40°C and 0.1 MPa. Pump the concentrated pigment solution into the DA-201 macroporous resin column at a flow rate of 3.6ml / min, and elute the chestnut shell brown pi...

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Abstract

The invention discloses a method for extracting a brown pigment of chestnut shells by using ultrasonic waves. The method comprises the following steps of: a) preparing chestnut shell powder; b) mixing the chestnut shell powder and an ethanol-sodium hydroxide solvent, performing first extraction under the function of the ultrasonic waves, standing, filtering, and preserving a first extract liquid; c) mixing filter residue obtained in the step b) and an ethanol-sodium hydroxide solvent, performing second extraction under the function of the ultrasonic waves, standing and filtering for the second time, and combining extract liquids in two times; d) filtering and concentrating the combined extract liquid obtained in the step c), purifying by using a macroporous resin, and collecting the purified eluant; and e) concentrating the eluant in the step d) under reduced pressure, and performing spray drying to obtain brown pigment powder of the chestnut shells. The extraction process is simple, the production efficiency is high, pollution is avoided, the pigment yield and product quality are greatly improved, the method can be promoted to large-scale industrial production, and waste resources, namely the chestnut shells, are utilized maximally.

Description

technical field [0001] The invention relates to a natural pigment extraction technology, in particular to an extraction technology for extracting brown pigment from chestnut shells by ultrasonic waves. Background technique [0002] As an important part of food additives, food coloring has attracted much attention for its safety. Food colorings can be divided into two categories: natural pigments and synthetic pigments according to their sources. Modern medicine has proved that most synthetic pigments have side effects to the human body in varying degrees, while natural pigments, especially those from edible plants, are not only safe, but also It also has certain nutritional and pharmacological effects. At present, countries all over the world are vigorously developing and utilizing natural pigments. It is an inevitable trend for the development of food pigments to gradually replace synthetic pigments with natural pigments. [0003] Chestnut shell brown pigment is a natural ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09B61/00
Inventor 周树勇
Owner 湖北紫鑫生物科技有限公司
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