Preparation method of hydroxypropyl modified starch
By using tetraethylammonium hydroxide, sodium carbonate, and tetrabutylammonium bromide as catalysts, the reaction environment was controlled and the contact probability between propylene oxide and activated hydroxyl groups was increased, thus solving the problem of preparing highly substituted hydroxypropyl starch and achieving efficient preparation of highly substituted hydroxypropyl modified starch to meet the needs of high-end applications.
Patent Information
- Application Number
- CN202511436631.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-09
- Publication Date
- 2025-12-02
- Estimated Expiration
- 2045-10-09
AI Technical Summary
Existing industrial technologies mainly focus on low-substituted hydroxypropyl starch, while high-substituted hydroxypropyl starch is difficult to prepare, making it difficult to meet the independent application needs of high-end papermaking, pharmaceuticals, oil extraction and other fields.
Highly substituted hydroxypropyl modified starch was prepared by using tetraethylammonium hydroxide, sodium carbonate, and tetrabutylammonium bromide as catalysts, through synergistic effects to regulate the reaction environment and increase the contact probability between propylene oxide and activated hydroxyl groups.
It significantly improves the degree of substitution of hydroxypropyl modified starch, meets the performance requirements of high-end applications, and realizes the efficient preparation of hydroxypropyl starch with a high degree of substitution.