Method for extracting tannin from banana stems and fruit axes

Abstract

The invention discloses a method for extracting tannin from banana stems and fruit axes, and the method comprises the following steps: (1) collecting materials, and shredding the materials; (2) kneading into threads; (3) squeezing, and collecting a stock solution; (4) concentrating; (5) preparing an animal glue solution for later use: adding animal glue into a saturated sodium chloride solution, and heating to dissolve the animal glue; (6) preparing an ethanol solution which is composed of 45-50 parts of 95wt% ethanol, 45-50 parts of softened water and 0.5-1 part of 60wt% hydrochloric acid; (7) stirring and clarifying; (8) filtering; (9) extracting tannin; and (10) drying at a low temperature to obtain the finished tannin product. The method provided by the invention has the advantages of low development cost and low labor intensity, and is convenient and practical. By utilizing the method disclosed by the invention, wastes are changed into valuable substances, resources are fully utilized, and new raw material resources are provided for the chemical industry in China; the required equipment is simple, and can be easily mastered by common working personnel in enterprises; no chemical assistant which is harmful to the environment is needed in the extraction process; and the method disclosed by the invention breaks through the traditional plant tannin extraction process, and performs an active function for protecting the ecology.

Description

technical field [0001] The invention relates to a method for extracting tannin, in particular to a method for extracting tannin from banana stems and fruit shafts. Background technique [0002] Tannic acid, alias: tannin, tannin, tannic acid. According to the definition of Bategnt, it refers to water-soluble polyphenolic compounds with a molecular weight of 500-3000 that can precipitate proteins and reduce biological activity. The application has expanded to medicine, food and other fields, including related low molecular weight polyphenols. Tannins are widely found in Chinese herbal medicines (such as five times, pomegranate peel, Agrimony) and plant foods (cereal beans such as barley, sorghum, mung beans, fruits and vegetables such as onions, grapes, tea). Tannin and protein, vitamins and minerals Substances form precipitated complexes, are considered anti-nutrients, and can degrade product quality through pro- or non-bacterial-promoted oxidative browning. However, the ...

AI Technical Summary

Problems solved by technology

The disadvantages are: although the process is traditionally feasible, due to the use of the flocculant dosage process, the energy consumption is high and the pollution is large; especially the flocculant has high price, high volatility, poor production conditions and high fire safety requirements in the workshop , and the entire workshop needs to be designed according to explosion-proof engineering, and the engineering investment is large

However, the water content of banana stems and fruit shafts is 90% and has not been developed.