Method for extracting brown pigment from oil-tea camellia husks

A technology of camellia husk and brown pigment, which is applied to chemical instruments and methods, azo dyes, organic dyes, etc., can solve problems such as unreported brown pigment in camellia husk, and achieve the effects of low production cost and simple process.

Inactive Publication Date: 2010-11-17
HANSHAN NORMAL UNIV
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Problems solved by technology

So far, there is no report on the extraction of brown pigment from Camellia oleifera husk

Method used

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Embodiment Construction

[0015] The present invention will be further described in detail through examples below, but the embodiments of the present invention are not limited thereto.

[0016] Wash the camellia oleifera shell with water, dry it, grind it into powder with a pulverizer, and pass it through a 40-mesh sieve for later use; accurately weigh 5.0g of the above-mentioned standby camellia oleifera shell powder, place it in a 150mL conical flask with a stopper, add volume Fraction 50mL of 40% ethanol solution, stir with a glass rod, so that the camellia oleifera husk powder is completely immersed in the solution. Under the conditions of ultrasonic power of 400W and temperature of 40°C, ultrasonic extraction was performed for 15 minutes, and the filtrate was obtained by suction filtration;

[0017] The filtrate was distilled under reduced pressure at a vacuum of 0.09Mpa to evaporate most of the ethanol; to obtain a concentrated pigment solution, after cooling, add 12.6mL of 0.2mol / L dipotassium h...

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Abstract

The invention discloses a method for extracting a brown pigment from oil-tea camellia husks. The method comprises the following steps of: cleaning the oil-tea camellia husks, drying the cleaned oil-tea camellia husks in the sun, and grinding the oil-tea camellia husks into powder; mixing the oil-tea camellia husk powder with water or ethanol, and performing ultrasonic extraction to obtain extraction mixed solution; performing suction filtration on the extraction mixed solution to obtain filtrate; performing reduced pressure distillation on the filtrate to evaporate the ethanol out so as to obtain concentrated pigment solution; adjusting the pH value of the concentrated pigment solution, and then adsorbing the concentrated pigment solution by using a chromatography column; eluting the chromatography column by using the ethanol to obtain purified pigment solution; performing reduced pressure distillation on the purified pigment solution to evaporate the ethanol out so as to obtain concentrated purified pigment solution; and performing vacuum drying on the concentrated purified pigment solution to obtain a brown pigment product. The method has a simple process, the needed instrumentsand equipment are common, the extraction rate can reach 3.0 to 5.6 percent, and the color value is high; the raw materials are the oil-tea camellia husks and can be changed from waste into valuable, the ethanol in the production process can be recycled, and the production cost is low; besides, the method uses the water or the ethanol as an extracting agent which causes no adverse effect on the environment.

Description

technical field [0001] The invention relates to the technical field of plant brown pigment production, in particular to a method for extracting brown pigment from camellia oleifera husk. Background technique [0002] Food coloring is generally divided into two categories: food natural coloring and food synthetic coloring. Synthetic pigments were once widely used due to their strong tinting strength, bright color, good stability, odorless and tasteless, uniform quality, easy dissolution and color matching, and low cost. However, incidents such as Sudan red and malachite green have caused round after round of food safety warnings, and people have gradually deepened their doubts about the safety of synthetic pigments, while natural pigments have continuously demonstrated their many benefits to human health. Unique advantages, vigorously developing "natural, nutritious, multi-functional" natural food coloring is the development policy of my country's food coloring industry. In ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09B61/00
Inventor 邱贺媛李冠中
Owner HANSHAN NORMAL UNIV
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