为实现一甲胺的高效回收利用，以迈奇化学自产的二次甲胺溶液为研究对象，提出了加压精馏和冷凝吸收连续工艺，通过流程模拟优化设计、小试试验验证以及工业化生产，证明了该工艺的可行性和实用性。此工艺方法甲胺回收率为98%以上，二甲胺及三甲胺质量分数满足40%甲胺水溶液标准。该技术的开发成功可以大幅减少甲胺废气对环境的污染，同时提高企业经济效益。

In order to realize the efficient recovery and utilization of monomethylamine from N-methyl pyrrolidone production,a continuous pressurized distillation and condensation absorption process is proposed for the secondary methylamine solution produced by MYJ Chemical Company Limited.Through process simulation,design optimization,test verification and industrial production,it is proved that this process is feasible and practicable.The recovery rate of methylamine can exceed 98% by this process,and the contents of both dimethylamine and trimethylamine in the recovering solution meet the standard of 40% methylamine aqueous solution.This process can greatly reduce the environmental pollution by methylamine-containing exhaust gas and improve the enterprise's economic benefit.