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Method for extracting refined curcumin and curcuma oil from curcuma

A technology of curcumin and turmeric oil, which is applied in food preparation, separation/purification of carbonyl compounds, food science, etc., can solve the problems of unutilized turmeric oil, unutilized turmeric oil, and low purity of curcumin, and achieve simplicity and effectiveness Separation, increase yield and content, and easy operation

Active Publication Date: 2009-06-03
CHENGUANG BIOTECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Patent Publication No. CN1566215 introduces a technology of alkali extraction and acid precipitation, but there is the disadvantage that turmeric oil is not utilized, and the purity of curcumin is low, and the content can only reach 40%; Patent Publication No. CN1554634 introduces a first acid hydrolysis , then use butyl acetate to extract and refine the way, there is a problem that turmeric oil is not utilized, and the curcumin yield is low, only about 0.8%; Adsorbed with kaolin, etc., and eluted with different solvents to obtain turmeric oil and curcumin, which has the problem of low yield of curcumin

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Wash the turmeric and dry it in the shade; crush it into 30-40 mesh turmeric powder, take 100g, add ethanol and n-hexane to prepare 500ml of mixed solvent according to 1.5:1 (volume ratio), heat and extract twice; filter and separate to remove the residue, combine the filtrate to concentrate , control the degree of concentration to be 70%, and reclaim the solvent; add 1% aqueous sodium chloride solution to the remaining concentrated solution, leave to stand for stratification after stirring; separate the supernatant and concentrate, reclaim n-hexane to obtain turmeric oil 4.1g; The lower liquid is adsorbed by a macroporous adsorption resin, washed with water to remove water-soluble impurities, then desorbed with ethyl acetate, concentrated and recovered ethyl acetate, and curcumin is crystallized to obtain 2.7 g of curcumin with a content ≥ 95%.

Embodiment 2

[0015] Wash the turmeric and dry it in the shade; crush it into 30-40 mesh turmeric powder, take 100g, add methanol and petroleum ether to prepare 400ml of mixed solvent according to 1:1 (volume ratio), heat and extract twice; filter and separate to remove the residue, combine the filtrate to concentrate , control the degree of concentration to be 75%, and reclaim the solvent; add 1.2% aqueous sodium chloride solution to the remaining concentrated solution, leave to stand for layering after stirring; separate the supernatant and concentrate, reclaim petroleum ether, and obtain turmeric oil 4.0g. The lower liquid is adsorbed by the macroporous adsorption resin, washed with water to remove water-soluble impurities, then desorbed with acetone, concentrated and recovered acetone, and curcumin is crystallized to obtain 2.8 g of curcumin with a content ≥ 95%.

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PUM

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Abstract

The invention relates to a method for extracting refined curcumin and curcuma oil from curcuma. The method comprises the following steps: the curcuma is cleaned, dried in the shade, crushed into 30-40 mesh curcuma powder, low-carbon alcohol and alkyl hydrocarbon are made into a mixed solvent at the volume ratio of 1:1-3, the curcuma powder and the mixed solvent are mixed at a weight ratio of 1:3-5 for extraction twice; the extracts are merged, filtered, separated and removed from dregs, the obtained filtrate is condensed, the concentration level is controlled at 60-90%, and the solvent is recovered; a separating agent containing 0-3% salt is added to the residual concentrated solution, the addition amount of the separating agent is 0.5-2 times of the volume of the concentrated solution, the obtained mixture is kept standing for demixing after evenly stirred; a supernatant is separated and condensed, and the alkyl hydrocarbon is recovered to obtain the curcuma oil; a subnatant is adsorbed by a macroporous absorbent resin, flushed to remove water soluble impurities, and eluted with a desorbent, the solvent is condensed and recovered to crystallize the curcumin, thus obtaining the curcumin with the content more than 95%.

Description

technical field [0001] The invention relates to a method for extracting refined curcumin and turmeric oil from turmeric. Background technique [0002] Turmeric is the rhizome of turmeric, a plant in the genus Curcuma longa of the ginger family, from which curcumin and turmeric oil can be extracted and utilized. Curcumin is a natural pigment. Because it is safe, non-toxic and has no side effects, it is one of the important natural food pigments allowed to be used at home and abroad. Turmeric oil is an important natural spice and spicy seasoning. [0003] At present, the extraction of curcumin and turmeric oil is generally divided into two steps. First, turmeric oil is obtained by steam distillation or extraction with an ester-soluble solvent, and then curcumin is extracted. There are many reports on the method of extracting curcumin, but there are mainly two types that are actually used. : The first is the alkaline water extraction method, and the second is the organic solv...

Claims

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Application Information

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IPC IPC(8): C07C49/255C07C45/78A23L1/223A23L27/14
Inventor 连运河田洪刘俊峰李新晴
Owner CHENGUANG BIOTECH GRP CO LTD
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