Energy-saving environment-friendly chitin deacetylation processing method

Abstract

The invention discloses an energy-saving environment-friendly chitin deacetylation processing method. The method comprises the steps of directly adding mitten crab carapace solid which is subjected toan acetic acid complex phosphoesterases acidolysis reaction and 6%-8% hydrochloric acid solution into an acidolysis tank to conduct secondary decalcification, detecting residual calcium of the mittencrab carapace after 4-6 hours, and stopping the reaction and moving the hydrochloric acid solution out of the acidolysis tank when no residue is left. According to the energy-saving environment-friendly chitin deacetylation processing method, acid liquid is fully used to make the acid liquid be saturated, and the purpose of achieving 'four desorption' is thoroughly achieved. The original waste acid is discharged after being basically consumed. Then new excessive hydrochloric acid is utilized to conduct secondary desorption, the left acid in the desorbed waste liquid is high and is used for conducting primary desalination and alkali treatment, and deproteinization and grease-desorption are also processed in the same way. The content of acid and alkaline in the discharged waste liquid is low, the acid liquid and the alkaline liquid are mixed to be neutral, and protein is separated out, and recycled to serve as high-quality feed and fertilizer. An oxidizing agent and a reducing agent forbleaching are treated together, and environment pollution can be removed without additionally adding agents. The energy-saving environment-friendly chitin deacetylation processing method is low in cost, high in benefit, free of pollution and high in product quality.

Description

technical field [0001] The invention relates to the technical field of chitin deacetylation processing, in particular to an energy-saving and environment-friendly chitin deacetylation processing method. Background technique [0002] Chitin (C8H1305N)n, also known as chitin, chitin, English name Chitin. It was discovered by French scholar Braconno in 1811 and extracted from crustacean shells by Ogier in 1823. Chitin has a wide range of applications, and can be used in industries such as fabrics, clothing, dyes, paper and water treatment. In agriculture, it can be used as insecticide and plant antiviral agent. In fishery, it is used as fish feed. Cosmetic beauty agent, hair protection, moisturizing agent, etc. Medical supplies can be used as contact lenses, artificial skin, sutures, artificial dialysis membranes and artificial blood vessels. Arthropods are mainly crustaceans, such as shrimps, crabs, etc., which contain chitin as high as 58% to 85%. [0003] Chitosan is t...

AI Technical Summary

Problems solved by technology

[0003] Chitosan is the product of chitin after the deacetylation reaction, and the method for making chitosan in the prior art has shortcomings such as long reaction time, decolorization treatment, and inability to control the degree of deacetylation. The process of making chitosan often produces a large amount of pollutants, causing certain damage to the environment

Images