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

Production of chitin chloride

A technology of chitosan hydrochloride and hydrochloric acid, which is applied in the field of preparing uniformly protonated and fully water-soluble chitosan hydrochloride powder, can solve problems affecting the scope of use, and achieve low cost, simple process, and mild reaction conditions Effect

Inactive Publication Date: 2007-09-05
WUHAN UNIV
View PDF0 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this point is not involved in the reported methods, and the pH value of the fully dissolved aqueous solution of the obtained product is generally less than 4, most of which are less than 3, which seriously affects its scope of use

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Embodiment 1: getting deacetylation degree is that 60% chitosan 50g and ethanol and concentration are the hydrochloric acid that is 15% (w / w) with volume ratio (v / v) and be that 2: 1 mixes the solution that makes by mass volume ratio Mix at a ratio of 1:2.4 (w / v), stir evenly at room temperature, and then place it at 45°C for 5 hours to react. The resulting mixture is in the form of wet particles and solids soaked in solution, and finally vacuum-dried to obtain chitosan salt salt powder products. The product's 1% aqueous solution has a pH value of 4.6 at 20°C.

Embodiment 2

[0013] Embodiment 2: getting the degree of deacetylation is that 85% chitosan 50g and acetone and concentration are 24% (w / w) hydrochloric acid with volume ratio (v / v) as 2: 1 mixes and makes solution by mass volume ratio Mix at a ratio of 1:1.7 (w / v), stir evenly at room temperature, then react at 45°C for 5 hours, and finally simply dry to obtain a chitosan hydrochloride powder product. The pH value of the 1% aqueous solution of this product is 5.8 at 20°C.

Embodiment 3

[0014] Embodiment 3: getting deacetylation degree is that 75% chitosan 50g and propanol and concentration are the hydrochloric acid that is 24% (w / w) with volume ratio (v / v) and is the solution that mixes 3: 1 by mass volume ratio Mix at a ratio of 1:2 (w / v), stir evenly at room temperature, react at 30° C. for 7 hours, and finally vacuum-dry to obtain chitosan hydrochloride powder product. The 1% aqueous solution of this product has a pH value of 5.3 at 20°C.

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

Production of soluble chitose chloride is carried out by mixing chlorhydric acid 6-36wt% with organic solvent in proportion of 1:0-4 into mixed solution, mixing it with chitose powders with deacetylating degree 60-100% in proportion of 1:2.5-1:1, agitating, laying aside at 0-80degree for 0-8hrs, and drying to obtain the final product. It's simple, cheap and efficient; it has gentle reactive condition and friendly environment and can be used in food, medicinal, chemical and agricultural industries.

Description

technical field [0001] The invention relates to a method for preparing chitosan hydrochloride, in particular to a method for preparing uniformly protonated and fully water-soluble chitosan hydrochloride powder. Background technique [0002] Chitosan is an alkaline polysaccharide obtained after partial deacetylation of chitin. Because the polysaccharide molecule contains amino groups, it has many excellent properties such as biocompatibility, biodegradability, non-cytotoxicity, antibacterial, Lowering cholesterol and blood lipids, enhancing immune function, anti-tumor activity and adsorption properties, suitable for use as functional materials and medical materials. Many properties of chitosan are closely related to its water solubility and positive charge. This can be achieved by reacting chitosan with aqueous solutions of organic or inorganic acids to form a salt. Chitosan hydrochloride is an important member of these salts. It can be used as a flocculant for sewage treat...

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 杨建红蔡俊杜予民
Owner WUHAN UNIV
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