Method for extracting chitosan from environment-friendly insects

An environmentally friendly chitosan technology, applied in the field of natural chitosan extraction process, can solve the problems of high sodium hydroxide residue and low washing utilization rate, and achieve the effect of improving washing efficiency and reducing emissions

Inactive Publication Date: 2013-01-30
NANJING DADI REFRIGERATION FOOD
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  • Application Information

AI Technical Summary

Problems solved by technology

At present, the source of chitosan extracted from nature is mainly the shells and cartilages of lower plant fungi, algae cells, arthropods, insects, and molluscs. The general process requires the use of

Method used

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Examples

Experimental program
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Embodiment Construction

[0012] The present invention will be further described below.

[0013] Put the pine caterpillar into a cloth bag, immerse it in water, squeeze and wash it, remove the impurities in the pupae skin of the pine caterpillar, filter to obtain the cleaned insect pupae skin, then immerse the pupae skin in 20% NaOH solution, heat to 80-90°C, The protein and lipids in the pupa skin are removed under the action of ultrasonic waves. Next, the insect pupa skin is washed three times to neutrality, and overflow water is used for washing. The first water washing tank and the third water washing tank Ultrasonic wave is set, and ultrasonic wave is carried out while rinsing to form cavities to accelerate the hidden impurities in the insect pupa skin, reduce the discharge of sewage, and dry in the sun. Put the dried insect pupal skin into the HCl solution to dissolve the inorganic salt, and wash it with water until it is neutral. Then oxidize and decolorize the pupal skin with 5-10% hydrogen pe...

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Abstract

The invention discloses a method for extracting chitosan from environment-friendly insects. The method compromises the following steps of: a, holding the insects into a cloth bag, soaking in water to squeeze and wash, removing impurities in insect pupa skin, filtering to obtain clean insect pupa skin, soaking the filtered insect pupa skin in NaOH solution, heating to 70-100 DEG C, removing protein and fat substances under the ultrasonic action, next washing the insect pupa skin to be neutral and then drying; b, holding the dried insect pupa skin in the heated HCl solution, removing inorganic salt and washing to be neutral; c, decolorizing the pupa skin by using hydrogen peroxide or potassium permanganate solution and washing to be neutral to obtain chitin; and d, next performing deacetylation in 40 percent of NaOH solution at the temperature of 110 DEG C and washing to be neutral to obtain the chitosan. The extraction rate of the chitosan obtained through extraction of the process can reach 18 percent, meanwhile, the washing efficiency is increased, and sewage discharge is reduced.

Description

technical field [0001] The invention mainly relates to the extraction process of natural chitosan. Background technique [0002] Chitosan exists widely in nature. With the continuous research on chitosan, it has been widely used in light industry, food, medicine and health, bioengineering and other fields. At present, the source of chitosan extracted from nature is mainly the shells and cartilages of lower plant fungi, algae cells, arthropods, insects, and molluscs. The general process requires the use of sodium hydroxide to remove protein lipids and acetyl groups, and A large amount of water is required for washing, and there are many residual sodium hydroxide, so the utilization rate of washing is low. Contents of the invention [0003] Purpose of the invention: in order to overcome the deficiencies in the prior art, the invention provides a method for extracting chitosan from environmentally friendly insects, and the extraction rate of chitosan extracted from silkworm ...

Claims

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Application Information

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IPC IPC(8): C08B37/08
Inventor 陈大弟
Owner NANJING DADI REFRIGERATION FOOD
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