A method for extracting proanthocyanidins from litchi peel

A technology for lychee peel and proanthocyanidin, which is applied in the field of extracting proanthocyanidins and extracting proanthocyanidins from lychee peel, can solve the problems of proanthocyanidin activity, high production cost, low extraction rate and the like, and achieves high in vitro antioxidant activity, improved extraction rate, and improved extraction rate. rate effect

Active Publication Date: 2017-10-03
HUIZHOU UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the production cost of supercritical extraction technology is high, and direct extraction with ethanol will bring problems such as low extraction rate and affected activity of proanthocyanidins.

Method used

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  • A method for extracting proanthocyanidins from litchi peel
  • A method for extracting proanthocyanidins from litchi peel

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Experimental program
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Effect test

Embodiment 1

[0022] A method for extracting proanthocyanidins from litchi peel, comprising the following steps:

[0023] A. Raw material processing: After the lychee peel is naturally dried, it is crushed with low-temperature liquid nitrogen and passed through a 80-mesh sieve;

[0024] B. Ultrasonic pretreatment: adding volume crushed to 60% ethanol solution with a ratio of 1:8 to the ratio of solid to liquid, and ultrasonically treated for 10 minutes;

[0025] C. Extraction: extract the mixed solution after ultrasonic treatment in step B for 45 minutes at 45°C;

[0026] D. Purification: After recovering the solvent, put the AB-8 macroporous adsorption resin on the water phase, and use 10 times the amount of distilled water and 50% ethanol to distribute and elute, and the eluent is concentrated in vacuum at 50°C;

[0027] E. Drying: freeze-dry the eluate into powder.

[0028] In the step A, the conditions for crushing with low-temperature liquid nitrogen are that the feed rate of nitrog...

Embodiment 2

[0031] A method for extracting proanthocyanidins from litchi peel, comprising the following steps:

[0032] A. Raw material processing: After the lychee peel is naturally dried, it is crushed with low-temperature liquid nitrogen and passed through a 120-mesh sieve;

[0033] B. Ultrasonic pretreatment: add the ethanol solution that is crushed to 90% in volume at a ratio of 1:12, and ultrasonically treat for 10-20 minutes;

[0034] C. Extraction: extract the mixed solution after ultrasonic treatment in step B for 55 minutes at 55°C;

[0035] D. Purification: After recovering the solvent, put the AB-8 macroporous adsorption resin on the water phase, and use 10 times the amount of distilled water and 50% ethanol to distribute and elute, and the eluent is concentrated in vacuum at 50°C;

[0036] E. Drying: freeze-dry the eluate into powder.

[0037] In the step A, the conditions for crushing with low-temperature liquid nitrogen are that the feed rate of nitrogen gas is 4mL / s, th...

Embodiment 3

[0040] A method for extracting proanthocyanidins from litchi peel, comprising the following steps:

[0041] A. Raw material processing: After the lychee peel is naturally dried, it is crushed with low-temperature liquid nitrogen and passed through a 100-mesh sieve;

[0042] B. Ultrasonic pretreatment: add volume crushed to 75% ethanol solution at a ratio of 1: 10, and ultrasonically treat for 15 minutes;

[0043] C. Extraction: extract the mixed solution after ultrasonic treatment in step B for 50 minutes at 50°C;

[0044] D. Purification: After recovering the solvent, put the AB-8 macroporous adsorption resin on the water phase, and use 10 times the amount of distilled water and 50% ethanol to distribute and elute, and the eluent is concentrated in vacuum at 50°C;

[0045] E. Drying: freeze-dry the eluate into powder.

[0046] In the step A, the conditions for crushing with low-temperature liquid nitrogen are that the feed rate of nitrogen gas is 3 mL / s, the feed rate of l...

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Abstract

The invention relates to a method for extracting proantho cyanidins from litchi peels and belongs to the technical field of active substance extraction from agricultural products. The method comprises the steps of raw material treatment, ultrasonic pretreatment, extraction, purification, drying and the like. The method utilizes the ultrasonic extraction technology, together with ethyl alcohol, to extract proantho cyanidins from litchi peels to achieve the purposes of improving the proantho cyanidins extraction ratio, shortening the extraction time, reducing the extraction temperature and maintaining the activity of extracted proantho cyanidins, and the extraction process is efficient, pollution-free and low in cost.

Description

technical field [0001] The invention relates to a method for extracting proanthocyanidins, in particular to a method for extracting proanthocyanidins from litchi peels, and belongs to the technical field of extracting active substances of agricultural products. Background technique [0002] Litchi is a southern fruit, and eating too much is prone to dryness and thirst or severe anger, and the best way is to use the efficacy and function of lychee skin to effectively relieve the above problems. Boiling lychee skin in water is the best coup. Lychee skin can clear away heat, reduce swelling, astringe and stop bleeding. Decoction in water can treat women's metrorrhagia, and washing it outside can treat children's acne. It is also suitable for a wide range of people. Generally, the boiled water of lychee skin is neither cold nor dry, and it can be eaten by any body type. [0003] In the industrialized production of lychee, a large amount of lychee peel is often discarded as wast...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D311/62
CPCC07D311/62
Inventor 张斌薛子光吴军张天义王春宁
Owner HUIZHOU UNIV
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