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Method for extracting polyphenol substances from litchi pericarp

A technology of litchi peels and substances, which is applied in the field of extraction of active substances of agricultural products, can solve the problems of complex extraction process and further improvement of extraction rate, and achieve the effects of improved extraction efficiency, low production cost and rich content

Inactive Publication Date: 2015-04-29
HUIZHOU UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the extraction process is complicated, and the extraction rate needs to be further improved.

Method used

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  • Method for extracting polyphenol substances from litchi pericarp
  • Method for extracting polyphenol substances from litchi pericarp

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A method for extracting polyphenols from litchi peel, comprising the following steps:

[0022] A. Raw material processing: After the lychee peels are naturally dried, they are crushed with low-temperature liquid nitrogen. The feed rate of nitrogen gas is 2mL / s, and the feed rate of lychee peels is 3g / s. The crushing temperature is -10°C.

[0023] B. Extraction: extract 5 parts of litchi peel powder, 20 parts of ethanol solution with a volume fraction of 60%, and 0.1 part of surfactant at 50° C. for 60 minutes, and the parts are parts by weight;

[0024] C. Purification: After recovering the solvent, use column chromatography to separate and purify;

[0025] D. Drying: freeze-dry the eluate into powder.

Embodiment 2

[0027] A method for extracting polyphenols from litchi peel, comprising the following steps:

[0028] A. Raw material processing: After the lychee peel is naturally dried, it is crushed with low-temperature liquid nitrogen. The feed rate of nitrogen gas is 4mL / s, and the feed rate of lychee peel is 5g / s. The crushing temperature is 0°C.

[0029] B. Extraction: extract 9 parts of litchi peel powder, 30 parts of ethanol solution with a volume fraction of 80%, and 0.5 part of surfactant at 70°C for 90 minutes; the parts are parts by weight;

[0030] C. Purification: After recovering the solvent, use column chromatography to separate and purify;

[0031] D. Drying: freeze-dry the eluate into powder.

Embodiment 3

[0033] A method for extracting polyphenols from litchi peel, comprising the following steps:

[0034] A. Raw material processing: After the lychee peel is naturally dried, it is crushed with low-temperature liquid nitrogen. The feed rate of nitrogen gas is 3mL / s, and the feed rate of lychee peel is 4g / s. The crushing temperature is -5°C.

[0035] B. Extraction: 7 parts of litchi peel powder, 25 parts of ethanol solution with a volume fraction of 70%, and 0.3 part of surfactant were extracted at 60° C. for 75 minutes; the parts were all parts by weight;

[0036] C. Purification: After recovering the solvent, use column chromatography to separate and purify;

[0037] D. Drying: freeze-dry the eluate into powder.

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Abstract

The invention relates to a method for extracting polyphenol substances from litchi pericarp, and belongs to the technical field of active substance extraction of agricultural products. The preparation method comprises the following steps: treating raw materials, extracting, purifying, drying and the like. According to the method, the polyphenol substances in the litchi pericarp are subjected to alcohol extraction by combination of low-temperature liquid nitrogen crushing and a surfactant serving as an assistant, so that the extraction rate on the polyphenol substances is improved; the extraction time is shortened; the extraction temperature is reduced; the activity of the polyphenol substances is kept; and the method is efficient in extraction process, free of pollution and low in cost.

Description

technical field [0001] The invention relates to a method for extracting polyphenolic substances, in particular to a method for extracting polyphenolic substances from litchi peel, and belongs to the technical field of extracting active substances of agricultural products. Background technique [0002] Litchi is an evergreen tree belonging to Sapindaceae. It is an important fruit tree in the tropics and subtropics. It has a cultivation history of more than 2,000 years in my country. The cultivation area and output account for more than 80% of the world. It is the largest fruit tree in South China. , mainly distributed in Guangdong, Guangxi, Fujian, Hainan and Taiwan. Because of its rich nutrition, sweet and tender meat, and excellent quality, it is known as "the treasure of China". [0003] In the industrialized production of litchi, a large number of litchi peels have not been effectively developed and utilized as by-products, and are often discarded as waste. In fact, litch...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61K36/77A61K131/00
CPCA61K36/77A61K2236/15A61K2236/333A61K2236/55
Inventor 张斌薛子光吴军张天义王春宁
Owner HUIZHOU UNIV
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