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

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0016] Example 1:

[0017] Take 10 kilograms of snail shells, wash them with clean water, and then sterilize them with 0.1‰ potassium permanganate solution, soak for 20 minutes, rinse them with sterile water, put them into an enameled vacuum reactor (S6T), add 10 kilograms of hydrochloric acid solution , The concentration is 2mol / 1, soak for 12 hours, take out the upper layer liquid and filter, flush with water to neutrality, get 2 kg of white crustacean powder, put it in an enamel vacuum reaction tank, add 10% sodium hydroxide 3.2 Kilogram, stirred for 3 hours, temperature controlled at 90℃, vacuum reactor pressure was 758mmHg, extracted the supernatant, filtered, washed with water to neutrality, obtained chitin, dried it at low temperature, crushed to 80 mesh, and then Repeat the above process to obtain 1.6 kilograms of high-quality chitin with a purity of over 98%.

Example Embodiment

[0018] Example 2:

[0019] Take 500 kilograms of snail shells, sterilize them in the same way as in Example 1, put them into an enamel vacuum reaction tank, add 750 kilograms of hydrochloric acid solution with a concentration of 2 mol / l, soak for 12 hours, take out the upper layer liquid and filter, and rinse with water to neutral , Get 100 kilograms of white crustacean powder, put it into an enamel vacuum reaction tank, add 175 kilograms of sodium hydroxide with a concentration of 5%, and carry out agitation treatment for 4 hours. The temperature is controlled at 95°C and the pressure of the vacuum reaction tank is 756mmHg. The upper liquid is extracted, filtered, and washed with water to neutrality to obtain chitin, which is dried at low temperature, crushed to 80 meshes, and the above process is repeated again to obtain 80 kilograms of high-quality chitin with a purity of 98% or more.

Example Embodiment

[0020] Example 3:

[0021] Take 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% purity 160 kilograms of high-quality chitin.

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PUM

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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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