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Method for extracting proanthocyanidin from banana peels

A technology of proanthocyanidins and banana peels, applied in the direction of organic chemistry, etc., to achieve the effects of easy recycling, high extraction rate, large market development and utilization prospects

Inactive Publication Date: 2015-04-22
杨公明
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the defects of current pretreatment and extraction methods, and disclose a method for extracting proanthocyanidins from green banana peels

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] a. Preparation: remove the stem of the green banana, remove the pulp and leave the banana peel;

[0021] b. Color protection: The color protection solution is an aqueous color protection solution containing 0.05% sodium bisulfite, 0.1% vitamin C and 0.4% citric acid, and the green banana peel is immersed in the color protection solution for 10 minutes;

[0022] c. Quick freezing: place the banana peel after color protection in a tunnel freezer, freeze at -30°C for 20 minutes, and reduce the temperature to -18°C to obtain ice banana peel;

[0023] d. Pulverization: Set the temperature in the pulverizer cavity to 5-15°C, pulverize the iced banana peel into banana peel ice powder, and store at low temperature for use;

[0024] e. Microwave drying: The banana peel ice powder is placed in a tunnel microwave dense mesh low temperature and low dew point hot air drying equipment for drying, the temperature is 50~60℃, the standard moisture content is 30%, and the banana peel po...

Embodiment 2

[0029] a. Preparation: remove the stem of the green banana, remove the pulp and leave the banana peel;

[0030] b. Color protection: The color protection solution is an aqueous color protection solution containing 0.05% sodium bisulfite, 0.1% vitamin C and 0.4% citric acid, and the green banana peel is immersed in the color protection solution for 12 minutes;

[0031] c. Quick-freezing: place the banana peels after color protection in a tunnel freezer, freeze at -35°C for 30 minutes, and reduce the temperature to -18°C to obtain ice banana peels;

[0032] d. Pulverization: Set the temperature in the pulverizer cavity to -5 to 5°C, pulverize the iced banana peel into banana peel ice powder, and store at low temperature for later use;

[0033] e. Microwave drying: The banana peel ice powder is placed in a tunnel microwave dense mesh low temperature and low dew point hot air drying equipment for drying, the temperature is 40~50℃, the standard moisture content is 30%, and the bana...

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PUM

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Abstract

The invention discloses a method for extracting proanthocyanidin from banana peels. The method comprises the following steps of: banana peel extraction; color protection; quick freezing; smashing; microwave drying; ionic liquid extraction; ultracentrifugation; and spray drying to obtain a finished product of the proanthocyanidin. By utilizing quick freezing and low-temperature smashing technologies, the banana peels can be smashed uniformly and are small in particle size, low in proanthocyanidin loss and high in drying speed, and a sterilizing effect can also be realized while the banana peels are dried and dehydrated; the proanthocyanidin is prevented from being damaged by using a microwave-assisted ionic liquid extracting method; and the ionic liquid is easy to recycle. The method is simple in operation, mild in condition, high in yield and efficiency, clean and harmless in production process, low in energy consumption, high in benefit, high in yield and purity of the proanthocyanidin, suitable for large-scale production and application, and wide in prospects for comprehensive utilization of the banana peels and the commercialized market development of natural proanthocyanidin.

Description

technical field [0001] The invention relates to a method for extracting plant proanthocyanidins, in particular to a method for extracting proanthocyanidins from green banana peels by using microwave-assisted ionic liquids as raw materials, and belongs to the field of agricultural product processing. Background technique [0002] Banana is a tropical and subtropical characteristic fruit, and it is also a food crop in more than 40 countries in the world. Banana resources are abundant and the output is huge. In 2010, the annual output of bananas in my country exceeded 9 million tons. With the adjustment of my country's agricultural industrialization structure and the rapid development of the banana deep processing industry, a large number of banana peels produced by the deep processing of bananas have not been utilized. Banana peel contains a variety of nutrients such as sugars, phenols, lipids, organic acids, condensed tannins and proteins, and is also rich in a variety of vi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D311/62
Inventor 杨公明贾宝珠鲍金勇白永亮周洁静
Owner 杨公明