Method for preparing chitin and chitosan from dendrolimus punctatus larvae
A technology for chitin and chitosan, which is applied in the field of preparing chitin and chitosan, can solve the problems of harming pine forests, narrow market application fields, harming pine forests, etc., and achieves the effects of easy collection, widening the source of raw materials, and reducing the amount of harm.
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Examples
Embodiment 1
[0023] Take 1 kg of the old larvae of Dendrolimus punctatus, soak them in 15 times the volume of 1% NaCl solution for 2 hours, filter, and layer the larvae with each layer thickness not exceeding 2 cm. Place them in a common oven at 75°C for 6 hours. Then put the treated Dendrolimus punctatus larvae into a 20-mesh gauze bag, squeeze it in water for 0.5h until the skins and contents are separated, wash with tap water and filter to obtain 242g of skins. Insect skins were soaked in 15 times volume, 6% NaOH solution at 75℃ for 10h, after washing with tap water, then 15 times volume, 4% hydrochloric acid solution was soaked at 50℃ for 7h, after washing, 10 times volume, 9 times % Hydrogen peroxide was decolorized at 50°C for 4 hours, washed with distilled water, and dried to obtain 206 g of white flake solid chitin. The moisture content of the product is 8.89%, the ash content is 0.93%, the nitrogen content is 6.84%, and the yield is 20.6%.
[0024] The chitin product was further immer...
Embodiment 2
[0026] Take 1 kg of old larvae of Dendrolimus punctatus, and the method of detoxification and skin separation is the same as in Example 1. Insect skins were soaked in 15 times the volume of 8% NaOH solution at 78°C for 14 hours. After washing with tap water, they were soaked in 15 times the volume of 3% hydrochloric acid solution at 40°C for 8 hours. After washing with tap water, use 10 times the volume, 10% hydrogen peroxide was decolorized at 40°C for 4 hours, washed with distilled water, and dried to obtain 203 g of white flake solid chitin. The moisture content of the product is 8.89%, the ash content is 0.89%, the nitrogen content is 6.78%, and the yield is 20.3%.
[0027] The chitin product is further immersed in 15 times the volume, 40% NaOH solution for 10 hours to deacetylate, washed with tap water to neutral, then treated with 5% dilute hydrochloric acid solution for 6 hours, washed with distilled water to neutral, and dried to obtain 183g white flakes Solid chitosan. Th...
Embodiment 3
[0029] Take 1 kg of old larvae of Dendrolimus punctatus, and the method of detoxification and skin separation is the same as in Example 1. Insect skins were soaked in 15 times the volume of 10% NaOH solution at 75℃ for 12h. After washing with tap water, they were soaked in 15 times the volume of 6% hydrochloric acid solution at 45℃ for 6 hours. After washing with tap water, use 10 times the volume, 10% hydrogen peroxide was decolorized at 40°C for 4 hours, washed with distilled water, and dried to obtain 200 g of white flake solid chitin. The moisture content of the product is 8.32%, the ash content is 0.81%, the nitrogen content is 6.59%, and the yield is 20.0%.
[0030] The chitin product is further immersed in 15 times the volume, 50% NaOH solution for 6h to deacetylate, washed with tap water to neutral, then treated with 5% dilute hydrochloric acid solution for 6h, washed with distilled water to neutral, dried to get 179g white flakes Solid chitosan. The moisture content of th...
PUM
| Property | Measurement | Unit |
|---|---|---|
| viscosity | aaaaa | aaaaa |
| viscosity | aaaaa | aaaaa |
| viscosity | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More