Neopentyl glycol production device tail gas trimethylamine recovery system and method
By combining alkaline hydrolysis to break the azeotropic node with pressurized distillation, the problem of high-purity recovery of trimethylamine from the tail gas of neopentyl glycol production unit has been solved, achieving efficient recovery and resource utilization of trimethylamine, reducing energy consumption and wastewater discharge, and demonstrating significant economic and environmental benefits.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- LIAOCHENG LUXI CHEM ENG DESIGN
- Filing Date
- 2026-05-11
- Publication Date
- 2026-07-17
AI Technical Summary
The complex network of azeotropic compounds in the tail gas of neopentyl glycol production units makes it difficult to recover trimethylamine with high purity, and existing technologies cannot effectively solve this problem.
A combined technical solution is adopted, which involves breaking the azeotropic node through alkaline hydrolysis, widening the separation window through pressurized distillation, and coupling wastewater reuse. By breaking the azeotrope through alkaline hydrolysis, changing the azeotropic behavior of trimethylamine and water through pressurized distillation, and using the wastewater from the top of the wastewater treatment tower as makeup water for the absorption tower, a closed-loop cycle is formed to achieve efficient recovery of trimethylamine.
It achieves high-purity recovery of trimethylamine (purity above 95%), reduces energy consumption by 25-30%, reduces wastewater discharge, and improves resource utilization, resulting in significant economic and environmental benefits.
Smart Images
Figure CN122399515A_ABST
Abstract
Citation Information
Patent Citations
A kind of trimethylamine recovery device and its recovery process
CN104725238B
Liquid-state trimethylamine recycling device
CN204325201U
Neopentyl glycol production raw material recovery system
CN211035754U