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Method for pre-treating chitin raw material

A chitin and pretreatment technology is applied in the field of pretreatment of chitin raw materials, which can solve the problems of low effect and difficult chemical modification of chitin, and achieve the effects of reducing consumption, increasing the chemical reactivity of chitin and simple recovery.

Inactive Publication Date: 2010-07-14
汪昔奇 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, before using chitin as raw material to prepare chitin-derived products, chitin is not easy to be chemically modified due to its compact structure.
People naturally think of pretreatment of chitin raw materials, such as mechanical pulverization, ultrasonic treatment, microwave treatment, and ultrasonic treatment and microwave treatment are still in the laboratory stage. The method applied to industrial production so far is only mechanical pulverization, but little effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A kind of pretreatment method of chitin raw material is characterized in that adopting following steps:

[0026] 1) Put the chitin raw material into the gas-explosion expansion tank, inject the gas-explosion expansion medium, the gas-explosion expansion medium adopts water vapor, fill it with water vapor with a pressure of 0.5MPa and a temperature of 150°C, and maintain it for 5 minutes;

[0027] 2) Instantly release the pressure in the gas explosion expansion tank, and spray the chitin raw material into the normal pressure container to obtain the chitin concentrate.

Embodiment 2

[0029] A kind of pretreatment method of chitin raw material is characterized in that adopting following steps:

[0030] 1) Put the chitin raw material into the gas-explosion expansion tank, inject the gas-explosion expansion medium, the gas-explosion expansion medium adopts water vapor, fill in the water vapor with a pressure of 0.4MPa and a temperature of 140°C, and maintain it for 10 minutes;

[0031] 2) Instantly release the pressure in the gas explosion expansion tank, and spray the chitin raw material into the normal pressure container to obtain the chitin concentrate.

Embodiment 3

[0033] A kind of pretreatment method of chitin raw material is characterized in that adopting following steps:

[0034] 1) Put the chitin raw material into the gas-explosion expansion tank, inject the gas-explosion expansion medium, the gas-explosion expansion medium adopts water vapor, fill it with water vapor with a pressure of 0.3MPa and a temperature of 130°C, and maintain it for 15 minutes;

[0035] 2) Instantly release the pressure in the gas explosion expansion tank, and spray the chitin raw material into the normal pressure container to obtain the chitin concentrate.

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Abstract

The invention discloses a method for pre-treating a chitin raw material, which is characterized by comprising the following steps: 1), filling the chitin raw material in a gas explosion expansion tank and injecting a gas explosion expansion medium which may be vapor, water, aqueous ammonia or ethanol; and 2), relieving the pressure in the gas explosion expansion tank instantaneously and spraying the chitin raw material into a normal pressure container to obtain a chitin concentrate. Compared with the prior art, the method has the advantages of: 1), loosening the compact crystal structure of the chitin and increasing the exposure of active groups; 2), increasing the activity of chemical reaction to smoothly perform a main chemical reaction and increase the reaction speed; and 3), performing the main chemical reaction at a low temperature, inhibiting side reactions and improving product yield.

Description

technical field [0001] The invention relates to a pretreatment method for chitin raw materials, in particular to a method for processing chitin raw materials by an air explosion puffing method. Background technique [0002] Chitin, also known as chitin, chitin, etc., is a polysaccharide connected by N-acetyl-2 amino-D-glucose in the form of β-1,4 glycosidic bonds, and is a natural linear polymer compound. Its chemical name is (1,4)-2-acetylamino-2-deoxy-β-D-glucose. [0003] Chitin is divided into α, β, γ three configurations. In the chitin obtained from shrimp shells and crab shells, the α-type chitin accounts for the majority, and its molecular main chains are arranged in an antiparallel manner, with strong hydrogen bonding forces between molecules. In addition, α, β, γ The three configurations of chitin are intertwined, and the dense crystal structure makes it difficult to be chemically modified. For example, when using chitin as raw material to prepare chitin derivati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B37/08
Inventor 杨政汪昔奇汪乐意江先登
Owner 汪昔奇
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