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Production method of ultrafiltration membrane for extracting tannin from banana stems stoste

A banana stem and production method technology, which is applied in the direction of ultrafiltration, bulk chemical production, chemical instruments and methods, etc., can solve the problems of banana stem not being developed and utilized, extracting tannic acid, polluting the environment, etc. Low cost, simple process, less chemical raw materials

Inactive Publication Date: 2012-07-11
吴洁玲 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the lack of development and utilization of banana stalks, it has become a kind of waste in the corners of the fields, and is allowed to rot and mold in the fields, seriously polluting the environment.
In recent years, many people have been using banana stalks to make paper, but they have not extracted tannic acid from the original solution, resulting in a huge waste of such resources

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The original solution of banana stalks is used as the raw material for the first time to pass through the imported ceramic ultrafiltration membrane with a precision pore size of 15 nanometers to cut the collection of molecular weight greater than 200, and for the second time to filter through the ultrafiltration membrane with a molecular weight greater than 500; the original solution filtered by the ultrafiltration membrane is single Separation of tannin and water, and then use a nano-membrane with a cut molecular weight greater than 800 to concentrate. Use a supercritical extraction system to separate under a pressure of 0.3Pa for 1 hour to extract tannin; then boost the pressure twice and heat it at 40 degrees for 2 hours , after clarification, concentration and purification, put it into the penetration vaporization device until 80% of the crude tannin extract is decomposed; concentrate the crude tannin extract under reduced pressure to 1 / 5 of the original volume, let i...

Embodiment 2

[0033] For the first time, using banana stalk stock solution as raw material, imported ceramic ultrafiltration membrane is used for the first time, and the precision pore size is 18 nanometers. Separation from water, and then use a nano-membrane with a molecular weight greater than 1000 to concentrate, use a supercritical extraction system, separate at a pressure of 0.4Pa for 50 minutes to extract tannins; then increase the pressure twice and heat it at 40 degrees for 2.5 hours After clarification, concentration and purification, put it into the permeation vaporization device until 86% of the crude tannin extract is decomposed; concentrate the crude tannin extract under reduced pressure to 1 / 8 of the original volume, stand for crystallization, and repeat twice to obtain Tannin products.

Embodiment 3

[0035] The original solution of banana stalks is used as the raw material for the first time to pass through the imported ceramic ultrafiltration membrane with a precision pore size of 20 nanometers to cut the collection of molecular weight greater than 350, and for the second time to filter through the ultrafiltration membrane with a molecular weight greater than 600; the original solution filtered by the ultrafiltration membrane is single Separation of tannin and water, and then use a nano-membrane with a molecular weight greater than 1200 to concentrate, and use a supercritical extraction system to separate the tannin under a pressure of 0.6Pa for 1 hour to extract the tannin; After clarification and concentration and purification for 1 hour, put it into the penetration vaporization device until 91% of the crude tannin extract is decomposed; concentrate the crude tannin extract under reduced pressure to 1 / 10 of the original volume, stand for crystallization, and repeat 3 time...

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Abstract

The invention relates to a production method of an ultrafiltration membrane for extracting tannin from banana stem stoste. The steps are as follows: separating and pre-filtering the stoste pressed efficiently from banana stem using ultra filtration membrane with 15-20 nm pore size; concentrating the stoste with nanometer film of molecular weight cut-off in the range from 500 to 600, concentrating the stoste with nanometer film of molecular weight cut-off in the range from 800 to 1200 for the third times, extracting when separating organic matter and water under normal pressure for 1 to 2hrs, resolving the tannin matter from the extract, increasing the pressure of the reactor, and extracting for 1 to 3hrs after heating to 40 DEG C; concentrating to 1 / 5 to 1 / 10 of original volume, crystallizing after standing for a while, and repeating for 2 to 3 times, so as to obtain the tannin products. The production method provided by the invention is preceded under normal temperature, has few loss of active ingredient and is suitable to separate and concentrate vegetable tannin; and the production method provided by the invention has the advantages of only simple pressed transformation, repetition, simple process, extremely low power consumption, low cost, zero pollution to products, excellent selectivity and highly adaptability.

Description

technical field [0001] The invention belongs to the industrial field of extracting plant tannin, and relates to a production method for extracting tannin by using banana stem liquid as a raw material. Background technique [0002] Tannin, also known as tannic acid and tannin, is a water-soluble polyphenolic substance present in plants. Because of its own multi-hydroxy structure and strong activity, it has important applications in daily chemical, food, medicine, leather, metallurgy, and rubber industries. Due to its complex structure, tannin is also very complicated to use in chemical synthesis. At present, it is mainly extracted from plants, and in my country, it is mainly extracted from gallnuts with organic solvents. However, because the banana stalks have not been developed and utilized, they become a kind of waste in the corners of the fields, and are allowed to rot and mold in the fields, seriously polluting the environment. In recent years, many people have been us...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07H13/08C07H1/08B01D61/14
CPCY02P20/54
Inventor 吴洁玲
Owner 吴洁玲
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