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Method for producing snail chitin

A production method and technology of chitin, applied in the field of preparation of chitin, can solve the problems of low extraction rate, high cost, high labor intensity, etc., and achieve the effect of simple process method, less equipment required, and low cost

Inactive Publication Date: 2003-12-24
陈玉柱
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the production method of chitin is an open-factory reaction, that is, the animal's carapace is placed in a large pond opened by the factory for reaction. The reaction time is relatively long, the extraction rate is very low, and the loss is relatively large. Therefore, relatively The cost is relatively high, and the labor intensity is very high, and the working environment is relatively difficult

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Take 10 kg of snail shells, wash them with clean water, disinfect them with 0.1‰ potassium permanganate solution, soak them for 20 minutes, rinse them with sterile water, put them into an enamel vacuum reaction tank (S6T), and add 10 kg of hydrochloric acid solution , the concentration is 2mol / 1, soak for 12 hours, take out the supernatant liquid and filter, flush with clear water until neutral, get 2 kg of white carapace powder, put it into the enamel vacuum reaction tank, add the concentration of 10% sodium hydroxide 3.2 kg, stirred for 3 hours, the temperature was controlled at 90°C, the pressure of the vacuum reaction tank was 758mmHg, the supernatant was extracted, filtered, washed with water until neutral to obtain chitin, dried at low temperature, crushed to 80 mesh, and then By repeating the above process, 1.6 kg of high-quality chitin can be obtained with a purity of more than 98%.

Embodiment 2

[0019] Get 500 kilograms of snail shells, disinfect them with the same method as in Example 1, put them into an enamel vacuum reaction tank, add 750 kilograms of hydrochloric acid solution, the concentration is 2mol / l, soak for 12 hours, take out the supernatant and filter, wash with water to neutral , to obtain 100 kilograms of white carapace powder, put it into an enamel vacuum reaction tank, add 175 kilograms of sodium hydroxide with a concentration of 5%, carry out the stirring process for 4 hours, control the temperature at 95 ° C, and the vacuum reaction tank pressure is 756mmHg, Extract the supernatant, filter, wash with water until neutral to obtain chitin, dry it at low temperature, crush it to 80 mesh, repeat the above process, and obtain 80 kg of high-quality chitin with a purity of more than 98%.

Embodiment 3

[0021] Get 1000 kilograms of snail shells, clean, decalcify and degrease in the same way as in Examples 1 and 2, add 1000 kilograms of salt ester solution, 300 kilograms of 8% potassium oxide solution, and control the temperature at 93 ° C to obtain 98% pure 160 kg of high-quality chitin.

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Abstract

A process for preparing snail chitin from snail shell includes immersing snail shell in hydrochloric acid solution in vacuum reactor for decalcifying it, and immersing in the solution of sodium hydroxide or potassium oxide in vacuum reactor at 90-95 deg.C for 3-4 hrs under 756-758 mmHg for defatting. Its product has high purity (98% or more).

Description

Technical field: [0001] The invention relates to a production method for preparing chitin from snail raw materials. Background technique: [0002] Snail chitin is also called chitin, chitosan and chitin. Chitin is a white or light yellow transparent solid, which is the only homogeneous polysaccharide containing amino in nature. Mucopolysaccharide, the molecular formula is (C 8 h 13 NO 5 ) n , Molecular weight about 106, insoluble in water, ethanol, ether and dilute acid, dilute alkali, soluble in anhydrous formic acid, concentrated inorganic acid. When reacted with concentrated caustic soda, soluble chitin can be generated. It is produced by organisms and can also be dissolved by organisms. It is a polymer substance that does not pollute the environment. Chitin derivatives include chitin (chitosan), chitin and carboxymethyl chitin. Chitosan is chitin treated with concentrated lye and chemically modified to remove acetyl groups. Its chemical properties are also differ...

Claims

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Application Information

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IPC IPC(8): C08B37/08
Inventor 陈玉柱
Owner 陈玉柱
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