一种高粘度阔叶木化学浆制备方法
By employing mild pretreatment, a dual-enzyme system, and CMC grafting modification technology, the problems of reduced cellulose polymerization degree and low lignin removal efficiency in existing technologies have been solved, enabling the preparation of high-viscosity hardwood chemical pulp and improving pulp viscosity and cellulose binding strength.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- GUANGXI SUN PAPER CO LTD
- Filing Date
- 2026-05-11
- Publication Date
- 2026-07-17
AI Technical Summary
Existing hardwood chemical pulp preparation processes result in reduced cellulose polymerization and insufficient pulp viscosity, making it difficult to meet the production needs of high-end and specialty paper products. Furthermore, the lignin removal efficiency is limited, and residual lignin hinders the binding of cellulose molecules.
A mild pretreatment, dual-enzyme system treatment, and CMC grafting modification technique were employed, combined with microwave heating and a weakly alkaline environment. Cellulose was swollen by deep eutectic solvent infiltration, sodium hydroxide, and tetrabutylammonium hydroxide. Hemicellulose and lignin were degraded by xylanase and laccase. CMC formed stable ether bonds with epichlorohydrin, enhancing the intermolecular binding force of cellulose molecules.
It effectively retains the degree of polymerization of cellulose, increases pulp viscosity, and enables the preparation of high-viscosity hardwood chemical pulp to meet the production needs of high-end paper products and specialty paper products.