一种NMP间歇精馏设备及工艺
By using a scraped-film evaporator-reboiler and a gas-liquid mixing pump for deoxygenation in a batch distillation unit, combined with a vacuum system and reflux control, the problems of complex NMP recovery equipment and low purification capacity are solved, achieving efficient NMP recovery and purification.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- GUANGDONG TIAN RUI DE NEW ENERGY TECH CO LTD
- Filing Date
- 2023-12-29
- Publication Date
- 2026-07-17
AI Technical Summary
Existing NMP recovery equipment has a complex structure, low recovery and purification capacity, and intermittent distillation can easily lead to the reaction between NMP in the NMP waste liquid and dissolved oxygen in the raw materials, resulting in a decrease in product recovery rate.
The process employs batch distillation equipment and technology, including a scraped film evaporator-reboiler and a gas-liquid mixing pump. It reduces side reactions through deoxygenation treatment, and combines a vacuum system and reflux controller to optimize heating and reflux ratio, control the temperature inside the vessel, and integrate pretreatment, dehydration and purification processes.
It increases NMP recovery and purification rates, reduces side reactions, lowers equipment investment costs, and is suitable for small-scale production enterprises.
Smart Images
Figure CN117563261B_ABST