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Method for extracting pigment from tangerine peel

A technology of orange peel and pigment, which is applied in the field of preparation technology for extracting pigment and essential oil from orange peel, can solve the problems of large solvent loss, low oil yield, unsuitability for large-scale industrial production, etc., and achieve the effect of increasing the output rate

Active Publication Date: 2013-02-06
遂川万力电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The process of this method is long, and petroleum ether, a chemical raw material, is needed in the extraction process. Because petroleum ether is used in a large amount and is volatile, the solvent loss in the production process is large, and the economic benefit is not high.
Moreover, the peel absorbs a large amount of organic solvents, which will cause inconvenience to the subsequent pectin extraction.
Journal "Journal of Shaoguan University", Improvement of Extracting Essential Oil Experiment from Citrus Peel, September 2004, discloses a method for extracting essential oil from orange peel, which improves multiple steps; but its fragrance is insufficient, The complex process is not suitable for large-scale industrial production, and the oil yield is low
Journal of Heilongjiang University of Commerce, 2000, from the technology research of continuously extracting pigment pectin from citrus peel, discloses a kind of method for continuously extracting pectin and pigment, but this method pectin and pigment yield are relatively low, and only stay At the laboratory level, not suitable for large-scale industrial production

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0023] A method for extracting essential oil and pigment from orange peel, comprising the following steps:

[0024] 1) Select fresh orange peels without mildew, and put them in a cool, ventilated and dry place for later use;

[0025] 2) Soak 100 g of the orange peel in step 1) in 1 L of calcium carbonate saturated aqueous solution for 24 hours, remove and rinse;

[0026] 3) Cut the orange peel into 5mm square pieces, soak in 70% ethanol for 30 minutes, and remove the ethanol by rotary evaporation under reduced pressure;

[0027] 4) Irradiate under ultraviolet light for 15 minutes, send it into a screw press, add 100ml of pH regulator when pressing, the components of pH regulator are: 0.2mol / L NaCl and 0.1mol / L NaHCO 3 ;

[0028] 5) Take the filtrate after filtering the extruded product, and take out the filter residue for the subsequent production process of other products; according to the volume ratio of filtrate: sodium sulfate solution, add a sodium sulfate solution with...

Embodiment 2

[0037] A method for extracting essential oil and pigment from orange peel, comprising the following steps:

[0038] 1) Select fresh orange peels without mildew, and put them in a cool, ventilated and dry place for later use;

[0039] 2) Soak 100 g of the orange peel in step 1) in 1 L of calcium carbonate saturated aqueous solution for 24 hours, remove and rinse;

[0040] 3) Cut the orange peel into 5mm square pieces, soak in 70% ethanol for 40 minutes, and remove the ethanol by rotary evaporation under reduced pressure;

[0041] 4 Irradiate under ultraviolet light for 30 minutes, send it into the screw press, add 100ml of pH regulator when pressing, the components of the pH regulator are: 0.2mol / L NaCl and 0.1mol / L NaHCO 3 ;

[0042] 5) Take the filtrate after filtering the extruded product, and take out the filter residue for the subsequent production process of other products; according to the volume ratio of filtrate: sodium sulfate solution, add a sodium sulfate solution w...

Embodiment 3

[0051] 1. Analysis of essential oils and pigment components extracted by embodiment 1:

[0052] The components of essential oils were analyzed by GC-MS technology: D-limonene 81.17%, terpinene 6.27%, myrcene 2.96%, linalool 2.46%, 2-thujene 1.28%, terpinolene 1.046%, and other minor components. At room temperature, use an ultraviolet-visible spectrometer to analyze the visible spectrum in the range of 400-800nm, use absolute ethanol as a reference, take the wavelength as the abscissa, and the absorbance as the ordinate to plot the absorption curve, and the oil solubility is between 440nm and 468nm There are two obvious absorption peaks at 475nm, and the water solubility has a significantly larger absorption peak at 475nm. After weighing, it was found that the yield of water-soluble pigment was about 0.6g / 100g orange peel; the yield of oil-soluble pigment was about 0.3g / 100g orange peel.

[0053] 2. Appropriate amount of ethanol treatment:

[0054] Using an appropriate amoun...

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Abstract

The invention relates to a technique for extracting pigment and essential oil from plants, particularly a preparation technique for extracting pigment and essential oil from tangerine peel. The technique improves and optimizes the conventional extraction method in the prior art, adopts the steps of ethanol treatment, ultraviolet irradiation, acetone extraction and the like, optimizes the reaction parameters, and greatly enhances the output efficiency of pigment and essential oil, thereby having wide application prospects.

Description

technical field [0001] The invention relates to a technology for extracting pigments and essential oils from plants, in particular to a preparation technology for extracting pigments and essential oils from orange peels. Background technique [0002] China is the main producing area of ​​tangerines, the cultivation area ranks first in the world, and the output ranks the third in the world. It is rich in tangerine resources and has a variety of high-quality varieties. It has a cultivation history of more than 4,000 years. As early as the Xia Dynasty (21st century to the 17th century before), the citrus produced in Jiangsu, Anhui, Jiangxi, Hunan, Hubei and other places in China has been listed as a tribute tax. After long-term cultivation and selection, citrus has become a precious fruit for human beings. Orange peel is a by-product after orange processing, which accounts for 25%-40% of the whole fruit weight, and the pigment content in orange peel can reach 1%-4%. Essential...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09B61/00C11B9/02C08B37/06
Inventor 高伟咸阳张光举曹德珍夏阳
Owner 遂川万力电子科技有限公司
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