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Preparation method for extracting chitosan from holotrichia parallela

A technology of black beetle and chitosan, which is applied in the field of preparation of chitosan extracted from the black beetle, can solve the problems of harming plants, rising to the surface, and lurking deep in the soil in winter and summer, so as to achieve environmental pollution The effect of small size, reduced extraction cost, reduced usage and time

Inactive Publication Date: 2012-10-03
SHANDONG PEANUT RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The dark-branched beetles belong to the order Coleoptera and are numerous in number. They harm the leaves, flowers, buds and fruits of plants above the ground, and migrate vertically with temperature changes. They rise to the surface in spring to do damage, and hide deep in the soil in winter and summer. , a large number of scarab insects are captured in agricultural production every year for pest control, and the research on preparing chitosan from the captured black beetles has not yet been reported

Method used

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  • Preparation method for extracting chitosan from holotrichia parallela

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Embodiment 1

[0013] A preparation method of extracting the chitosan with a dark gill turtle, the steps are as follows: Wash the dark gill turtle adults with water and freeze -20 ° C and kill, dry it in 60 ° C in the oven, crush and sieve over 20 measuring sieves to get itInsect powder; add 1mol / L hydrochloric acid of the income insect powder to 20 times, and treat 30min at 100 ° C water bath; pump filter, abandon filtrate, wash the residue water to a neutral, keep the filtrate; add 20 times the amount of 1mol / L hydrogen oxidation to the filter residue;Sodium, 24 hours of water bath at 80 ° C; pumping, abandoning filtrate, filter residue water was washed to neutral, retaining the filter residue; 1 % potassium permanganate solution was added to the filter residue, 1 % of the normal temperature treatment, and the filtration was pumped.Discard the filtrate, washed the filtrate water to a neutral, and retains the filtrate; the produced filtrate adds 40 % of the sodium hydroxide solution of 10 times...

Embodiment 2

[0015] A preparation method of extracting chitosan with a dark gill turtle is different from the embodiment 1:: The produced filtration residue adds an 8x amount of 45 % sodium hydroxide solution, soak the room temperature for 24 hours, and then 90 ° C water bath treatmentIn 15 hours, the filtration, abandoning filtering fluid, and filter residue water were washed until neutral, retained the filtrate, and dried the filter at 60 ° C to obtain the adult shell polycan.

Embodiment 3

[0017] A preparation method of extracting chitosan with a dark gill turtle is different from the embodiment 1 and 2. It is: the produced filtration residue adds 5 times the amount of sodium hydroxide solution of 50 %.For 10 hours of water bath, draw filter, abandon filtrate, wash the residue water to a neutral, keep the filter, dry the filter 60 ° C to get the adult shell polycanic pure product.

[0018]

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Abstract

The invention discloses a preparation method for extracting chitosan from holotrichia parallela, which comprises the following steps: rinsing, freezing, drying and smashing the holotrichia parallela to remove inorganic salt and protein of the holotrichia parallela, subsequently, soaking the obtained holotrichia parallela in concentrated alkaline for reaction at a specific temperature for certain time; and finally, filtering, washing, drying and extracting the reaction product to prepare chitosan. According to the method, the agricultural pest is taken as the raw material to implement the reutilization of biological resources; the acid treatment quantity and time during extraction are greatly reduced and the extraction cost is also reduced; and furthermore, less waste liquor is generated and less pollution is caused to the environment in the technical process; and the prepared chitosan has high quality and is relatively low in contents of ash, heavy metal and calcium.

Description

Technical field [0001] The present invention involves a method of preparing a chitosan, especially the preparation method of extracting the chitosan by using the dark gill turtle. Background technique [0002] Sleeping glycogen is a product of a metharine N -dehydracelcelceron. Generally speaking, more than 55 % of the N -acetyl -based can be chitosan. In recent years, the application of chitosan has become a hot topic.Shelling glycogen is a polysaccharide of natural sources. It has the characteristics of non -toxic, good biocompatibility, degradable, membrane and moisturizing.Printing and dyeing, papermaking, agriculture, environmental protection, and the fixed carrier of enzymes are widely used. [0003] At present, the raw materials of shell glycogen are mainly crustacean sources of shrimp and crab shells, but the crustacin content in shrimp and crab shells is small, and the content of inorganic salts is high (greater than 30 %). The extraction cost is high.The content of ash,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B37/08
Inventor 刘少芳杨庆利孙杰于丽娜毕洁张初署朱凤曲明静
Owner SHANDONG PEANUT RES INST
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