Method for producing purified polysaccharide, purified polysaccharide, and method for suppressing coloration of purified polysaccharide
The method of desalting polysaccharides using acid and water treatments addresses the challenges of thermal decomposition and coloration in existing methods, achieving a purified polysaccharide that suppresses coloration at high temperatures.
Patent Information
- Application Number
- JP2023149842
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2023-09-15
- Publication Date
- 2025-03-28
AI Technical Summary
Existing methods for producing purified polysaccharides face challenges such as low persistence of stabilization by esterification with boric acid and the need for high-temperature pretreatment, which can promote thermal decomposition and coloration at high temperatures.
A method involving desalting of polysaccharides through an acid treatment step using hydrochloric acid or organic acids, followed by a water treatment step to remove metal elements and suppress coloration, even at high temperatures of 200°C or higher.
The method effectively suppresses coloration of purified polysaccharides at high temperatures, achieving a purified polysaccharide with a salt-forming acidic group content of 2.0% or less, which enhances thermal stability and prevents coloration.