Method for purifying loropetalum chinense flower red pigment by using aluminum oxide-calcium carbonate composite adsorbent

A composite adsorption and calcium carbonate technology, applied in the field of purification of natural pigments, can solve the problems of low purity of pigment products, long production cycle, complicated process, etc., and achieve good separation effect, low production cost and cheap price

Inactive Publication Date: 2015-03-25
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, these technical methods basically use a single technical method or a single adsorption stationary phase to separate and purify pigments, so there are disadvantages such as low pu

Method used

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  • Method for purifying loropetalum chinense flower red pigment by using aluminum oxide-calcium carbonate composite adsorbent
  • Method for purifying loropetalum chinense flower red pigment by using aluminum oxide-calcium carbonate composite adsorbent
  • Method for purifying loropetalum chinense flower red pigment by using aluminum oxide-calcium carbonate composite adsorbent

Examples

Experimental program
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Effect test

Embodiment 1

[0034] A kind of method utilizing aluminum oxide-calcium carbonate composite sorbent of the present invention to purify the red pigment of eucalyptus, comprises the following steps:

[0035] First weigh the red sage flower powder, then soak the red sage flower powder in 40% acetic acid for 20 minutes according to the solid-liquid ratio of the red sage flower powder and 40% acetic acid as 1g:10ml, and extract it twice with microwave. Extract 1 min each time to prepare the extract of the red pigment of the red jasmine; and then use the rotary evaporator to concentrate the red pigment extract of the red red pigment, so that each milliliter of the concentrated solution of the red red pigment contains the red red pigment Wood pollen 0.291g.

[0036] Activation treatment of neutral alumina: place neutral alumina at 150-160°C for 4 hours to complete the activation process.

[0037] First weigh 4 parts of 2.5g calcium carbonate, dry-pack them into the lower part of 4 chromatography c...

Embodiment 2

[0042] A kind of method utilizing aluminum oxide-calcium carbonate composite sorbent of the present invention to purify the red pigment of eucalyptus, comprises the following steps:

[0043] First weigh the red sage flower powder, then soak the red sage flower powder in 40% acetic acid for 20 minutes according to the solid-liquid ratio of the red sage flower powder and 40% acetic acid as 1g:10ml, and extract it twice with microwave. Extract 1 min each time to prepare the extract of the red pigment of the red stalks; then use the rotary evaporator to concentrate the red pigments of the red red pigments, so that each milliliter of the concentrated solution of the red red pigments obtained contains the red red pigments of the red Wood pollen 0.291g.

[0044] Activation treatment of neutral alumina: place neutral alumina at 150-160°C for 4 hours to complete the activation process.

[0045] First weigh 4 parts of 2.5g calcium carbonate, dry-pack them into the lower part of 4 chrom...

Embodiment 3

[0050] A kind of method utilizing aluminum oxide-calcium carbonate composite sorbent of the present invention to purify the red pigment of eucalyptus, comprises the following steps:

[0051] First weigh the red sage flower powder, then soak the red sage flower powder in 40% acetic acid for 20 minutes according to the solid-liquid ratio of the red sage flower powder and 40% acetic acid as 1g:10ml, and extract it twice with microwave. Extract 1 min each time to prepare the extract of the red pigment of the red stalks; then use the rotary evaporator to concentrate the red pigments of the red red pigments, so that each milliliter of the concentrated solution of the red red pigments obtained contains the red red pigments of the red Wood pollen 0.291g.

[0052] Activation treatment of neutral alumina: place neutral alumina at 150-160°C for 4 hours to complete the activation process.

[0053] First weigh 4 parts of 2.5g calcium carbonate, dry-pack them into the lower part of 4 chrom...

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Abstract

The invention discloses a method for purifying loropetalum chinense flower red pigment by using an aluminum oxide-calcium carbonate composite adsorbent. The method comprises the following steps: 1) preparing a loropetalum chinense flower red pigment concentrated solution, namely, firstly, extracting a loropetalum chinense flower red pigment extract from loropetalum chinense pollen powder, and further concentrating the loropetalum chinense flower red pigment extract, thereby obtaining the loropetalum chinense flower red pigment concentrated solution; and 2) purifying the loropetalum chinense flower red pigment, namely, by taking aluminum oxide and calcium carbonate as a composite adsorbent, feeding the loropetalum chinense flower red pigment concentrated solution onto a column for adsorption, and eluting by using an eluent, thereby obtaining the a purified loropetalum chinense flower red pigment chromatography liquid. As activated neutral aluminum oxide and calcium carbonate with the mass ratio of 2:1 are adopted as the composite adsorbent, the separation effect on loropetalum chinense flower red pigment is good; the price is low, and the production period is short, and meanwhile the production cost is low, the production efficiency is high and the equipment investment is small as no complex equipment is needed.

Description

technical field [0001] The invention relates to a method for purifying natural pigments, in particular to a method for purifying the red pigments of mahogany by using an alumina-calcium carbonate composite adsorbent. 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, natur...

Claims

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Application Information

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IPC IPC(8): C09B61/00B01J20/04B01J20/08B01D15/10B01D15/20
CPCB01D15/10B01D15/206B01J20/043B01J20/08B01J2220/60C09B61/00Y02P20/50
Inventor 舒孝顺张豪
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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