Method for extracting loropetalum chinense flower red pigment by adopting acetic acid-microwave process

A technology of rhododendron and rhododendron, which is applied in the field of extracting rhododendron rhododendron by adopting an acetic acid-microwave process, can solve the problems of easy destruction of heat-sensitive components, large energy consumption of raw material pretreatment, large loss of organic solvent, etc., and the extraction time is reached. Shortening, small damage, avoiding the effect of catalytic oxidation

Inactive Publication Date: 2015-03-25
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
View PDF4 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, pigment preparation methods can be roughly divided into solvent extraction method, enzyme reaction method, fermentation method and synthetic chemical natural pigment method, among which the most commonly used method is solvent extraction method (i.e. extraction method), but the traditional extraction method There are disadvantages such as long extraction time, high labor intensity, high energy consumption for raw material pretreatment, and easy destruction of heat-sensitive components at higher temperatures.
Commonly used solvents for solvent extraction include organic solvents, water, acidic solutions, alkaline solutions, etc. When using organic solvents for extraction, the loss of organic solvents is large, the cost is high, and it will inevitably lead to residual organic solvents.

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 extracting loropetalum chinense flower red pigment by adopting acetic acid-microwave process
  • Method for extracting loropetalum chinense flower red pigment by adopting acetic acid-microwave process
  • Method for extracting loropetalum chinense flower red pigment by adopting acetic acid-microwave process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Example 1: Effects of Different Extracting Agents on the Microwave Extraction of Red Pigment

[0034] The method for extracting the red pigment of the eucalyptus by microwave using different extractants, the specific steps are as follows:

[0035] Place the fresh red sage flower in a vacuum drying oven, and after drying at a constant temperature of 40°C, weigh 10 g of the dried red sage flower, pulverize it in a pulverizer, and pass it through a 100-mesh sieve to obtain dried sage flower powder.

[0036] Weigh 4 parts of dried safflower powder 1g and place them in four 50ml Erlenmeyer flasks, and add citric acid, oxalic acid and hydrochloric acid respectively according to the ratio of solid to liquid (flower mass g / solvent volume ml) as 1g:10ml and acetic acid (all acids contain 1% sodium aminotriacetate and 1% sodium metabisulfite, and the concentration of each acid is 20%), soak at room temperature for 20 minutes, and then microwave extraction twice, each extraction t...

Embodiment 2

[0038] Embodiment 2: the influence of acetic acid concentration on microwave extraction of red pigment

[0039] A kind of method that adopts acetic acid-microwave process of the present invention to extract the red pigment of the eucalyptus, concrete steps are as follows:

[0040] Put the fresh red sage flower in a vacuum drying oven, after drying at a constant temperature of 40°C, weigh 10g of the dried red sage flower, pulverize it in a pulverizer, and then pass it through a 100-mesh sieve to obtain dried sage flower powder.

[0041] Weigh 5 parts of dried safflower powder 1g and place it in five 50ml Erlenmeyer flasks, and add different concentrations of acetic acid ( Contains 1% sodium aminotriacetate and 1% sodium metabisulfite, acetic acid concentrations are 5%, 10%, 20%, 30%, 40%, soak at room temperature for 20 minutes, and then microwave extraction twice, each extraction time is 1 minute. After the leaching finishes, let it cool down to room temperature naturally, fi...

Embodiment 3

[0043] Embodiment 3: The influence of solid-liquid ratio on red pigment microwave extraction

[0044] A kind of method that adopts acetic acid-microwave process of the present invention to extract the red pigment of the eucalyptus, concrete steps are as follows:

[0045] Put the fresh red sage flower in a vacuum drying oven, after drying at a constant temperature of 40°C, weigh 15g of the dried red sage flower, pulverize it in a pulverizer, and pass it through a 100-mesh sieve to obtain dried sage flower powder.

[0046] Weigh 5 parts of dried safflower powder 1g and place them in five 50ml Erlenmeyer flasks, respectively according to the ratio of material to liquid (flower powder mass g / solvent volume ml) 1:6, 1:8, 1:10 , 1:12, 1:14, add 40% acetic acid (containing 1% sodium aminotriacetate and 1% sodium metabisulfite), soak at room temperature for 20 minutes, and then microwave extraction twice, each extraction time is 1 minute. After leaching finishes, allow it to cool nat...

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 discloses a method for extracting loropetalum chinense flower red pigment by adopting an acetic acid-microwave process. The method comprises the following steps: (1) drying, crushing and sieving fresh loropetalum chinense flowers to obtain loropetalum chinense flower powder; (2) soaking the loropetalum chinense flower powder in an acetic acid solution to obtain a loropetalum chinense flower-acetic acid solution; (3) performing microwave extraction on the loropetalum chinense flower-acetic acid solution for 1-5 times to obtain a loropetalum chinense flower red pigment extract solution; and (4) filtering the loropetalum chinense flower red pigment extract solution to obtain the loropetalum chinense flower red pigment. According to the method disclosed by the invention, the used acetic acid extracting agent contains 1% sodium nitrilotriacetate and 1% sodium metabisulfite, so that metal ions in the extract solution can be shielded and prevented from catalytic oxidation, oxidation damages of the loropetalum chinense flower red pigment are alleviated, and thus the extraction rate of the loropetalum chinense flower red pigment is increased; meanwhile, by adopting microwave extraction, the extraction time is greatly shortened, and the damages, caused in high-temperature microwave extraction, of the loropetalum chinense flower red pigment, are further avoided.

Description

technical field [0001] The invention relates to a method for extracting the red pigment, in particular to a method for extracting the red pigment of the eucalyptus by using an acetic acid-microwave process. Background technique [0002] Pigments can be divided into natural pigments and synthetic pigments according to different sources. As many studies have shown that some synthetic pigments have other harmful effects such as mutagenicity and carcinogenicity on the human body in addition to general toxicity. use. Natural pigments are not only safe and reliable, natural in color, but also have nutritional and pharmacological effects, so they are favored by people. Especially in recent years, with the increasing promotion and large-scale application of green food and natural cosmetics, the development and utilization of natural pigments It has become a hot spot in the food industry and cosmetics industry all over the world. It is the general trend to use safe, natural and non...

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): C09B61/00C09B67/14C09B67/54
CPCC09B61/00
Inventor 舒孝顺张豪孙雅婷
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap