Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for extracting chitin and chitin thereof

A technology of chitin and crude products, which is applied in the field of extraction of organic polymer compounds, can solve the problems of not being used in any way, and achieve the effects of improving comprehensive utilization value, high yield, and environmental protection

Inactive Publication Date: 2008-07-23
THE RES INST OF RESOURCES INSECTS RIRI OF THE CHINESE ACADEMY OF FORESTRY
View PDF1 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After the cochineal red material is extracted from the cochineal powder by this method, a large amount of residual insect residues are produced, and these insect residues are usually treated as waste without any utilization

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for extracting chitin and chitin thereof
  • Method for extracting chitin and chitin thereof
  • Method for extracting chitin and chitin thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Follow the steps below to extract chitin from cochineal slag:

[0034] 1) Remove protein

[0035] Take 50g of cochineal insect residue (dry weight), add 200mL of sodium hydroxide solution with a concentration of 1.0mol / L, heat and stir to mix evenly, heat to 80°C, and react for 1 hour, and filter the reaction solution with a 200-mesh filter , the resulting filtrate is rinsed with an appropriate amount of distilled water until the rinsed distilled water is neutral.

[0036] 2) Removal of inorganic salts

[0037] Add 200 mL of hydrochloric acid with a concentration of 1.0 mol / L to the filtrate, heat to 50°C, stir at a constant temperature, extract for 60 minutes, filter with a 200-mesh filter, and rinse the filtrate with an appropriate amount of distilled water until the distilled water after washing is neutral , the filtrate obtained is crude chitin.

[0038] 3) Oxidative decolorization

[0039] Add dispersant deionized water to the chitin crude product, the weight o...

Embodiment 2

[0047] Follow the steps below to extract chitin from cochineal slag:

[0048] 1) Remove protein

[0049] Take 50g (dry weight) of cochineal insect residue, add 350mL of sodium hydroxide solution with a concentration of 2.0mol / L, heat and stir to mix evenly, heat to 90°C, react for 3 hours, and filter the reaction solution with a 200-mesh filter , the resulting filtrate was rinsed with an appropriate amount of distilled water until the rinsed distilled water was neutral.

[0050] 2) Removal of inorganic salts

[0051] Add 200 mL of hydrochloric acid with a concentration of 2.0 mol / L to the filtrate, heat to 60°C, stir at a constant temperature, extract for 60 minutes, filter with a 200-mesh filter, and rinse the filtrate with an appropriate amount of distilled water until the distilled water after washing is neutral , to obtain crude chitin.

[0052] 3) Oxidative decolorization

[0053] Add dispersant deionized water to the crude chitin, the weight of the deionized water is...

Embodiment 3

[0061] Follow the steps below to extract chitin from cochineal slag:

[0062] 1) Remove protein

[0063] Take 50g (dry weight) of cochineal insect residue, add 150mL of sodium hydroxide solution with a concentration of 1.5mol / L, heat and stir to mix evenly, heat to 70°C, react for 2 hours, and filter the reaction solution with a 200-mesh filter , the resulting filtrate was rinsed with an appropriate amount of distilled water until the rinsed distilled water was neutral.

[0064] 2) Removal of inorganic salts

[0065] Add 150 mL of hydrochloric acid with a concentration of 3.0 mol / L to the filtrate, heat to 70°C, stir at a constant temperature, extract for 30 minutes, filter with a 200-mesh filter, and rinse the filtrate with an appropriate amount of distilled water until the distilled water after washing is neutral , to obtain crude chitin.

[0066] 3) Oxidative decolorization

[0067] Add the dispersant deionized water to the crude chitin, the weight of the deionized wate...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a method to extract a chitin by utilizing the residue of a cochineal insect from which a haematochrome is already extracted and a chitin prepared by the method. The chitin extraction method comprises: 1) the residue of the cochineal is hydrolyzed and the protein is deprived, 2) the inorganic salt inside the residue is removed and a crude product of the chitin is derived from the residue, 3) an oxidant is added into the crude product of the chitin to do the oxidation and the decoloration process. The extraction method is characterized in that taking use of the residue of the cochineal from which the haematochrome is extracted as a raw material with simple process and easy operation, the prepared chitin appearance color and lustre and physiochemical index are in accordance with the standards for the food, medicine, cosmetics, agriculture, and environment protection, and the prepared chitin by the method is possessed of high purity and low ash content. The extraction and preparation method of the chitin from the residue of a cochineal insect has the advantages of utilizing comprehensively the resource, achieving the purpose of full use of the whole cochineal insect, decreasing the environmental pollution, and improving the economic profit for the enterprises.

Description

technical field [0001] The invention relates to a method for extracting organic polymer compounds, in particular to a method for extracting natural polymer polysaccharides and the extracted natural polymer polysaccharides. Background technique: [0002] Chitin, also known as chitin, chitin, chitin, shell protein, clear keratin, clear cutin, crab shellin, insoluble chitin, etc., the chemical name is poly β-(1,4)- The molecular formula of 2-acetamido-2-deoxy-D-glucose is (C 8 h 15 NO 6 )n, is the only natural alkaline polysaccharide found so far. Chitin widely exists in the shells of shrimps and crabs of the crustacea Arthropoda, wherein the chitin content in shrimp shells is 20% to 25%, and the content in crab shells is between 15% and 20%; Insecta (such as Coleoptera, Diptera wings, etc.), mollusk (shellfish) squid skeleton, fungal lower plants such as yeast, mold mycelium cells and algae cells, and higher plants (such as mushrooms) in the cell wall, the reserves are in ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C08B37/08
Inventor 张弘冯颖郑华孙龙陈晓鸣石雷
Owner THE RES INST OF RESOURCES INSECTS RIRI OF THE CHINESE ACADEMY OF FORESTRY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com