Method for removing water from granules
By using cellulose ester particles of specific shapes and sizes and low-temperature drying gas technology, the problem of incomplete moisture removal during the drying process of cellulose ester particles has been solved, achieving rapid and efficient drying, which is suitable for the production of biodegradable food packaging products.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- EASTMAN CHEM CO
- Filing Date
- 2024-12-17
- Publication Date
- 2026-07-10
AI Technical Summary
In existing technologies, the moisture removal of cellulose ester particles is incomplete during the drying process, resulting in long drying times and high energy consumption, which affects polymer production efficiency and product quality.
Moisture is removed by drying cellulose ester particles of specific shape and size (D90 of 0.5 mm to 7.0 mm, average surface area to volume ratio (SA/V) greater than 1 mm⁻¹ to 3 mm⁻¹, gradient tube density less than 1.35 g/cc) in a drying unit using a drying gas at a temperature 30°C to 60°C below the glass transition temperature of the composition.
It significantly reduces drying time and energy consumption, improves the drying efficiency of cellulose ester particles, and produces particles with a moisture content of less than 1% by weight, making it suitable for the production of biodegradable food packaging products.
Smart Images
Figure CN122374585A_ABST