On May 20, 2025, the China Nitrogen Fertilizer Industry Association organized experts to evaluate the “...” developed and successfully implemented on an industrial scale by Henan Xin Lian Xin Chemical Industry Group Co., Ltd. and Tianjin Aozhan Xingda Chemical Technology Co., Ltd. Methanol Negative-Pressure Multi-Effect Coupled Distillation Energy-Saving Technology The scientific and technological achievement has undergone an appraisal, and the expert panel unanimously agreed to pass the appraisal, concluding that the technology has reached a domestically leading level.

Gu Zongqin, Chairman of the China Nitrogen Fertilizer Industry Association, served as the leader of the appraisal expert panel. The panel also included several senior industry experts, including Li Xiaodong, former Chief Expert and General Manager of the Coal Chemical Division at China National Coal Energy Group Co., Ltd.; Yu Tao, Chairman of Henan Jinkai Group Yanhua Chemical Co., Ltd.; Shan Xiuli, former Chief Engineer and Chief Expert at Hualu Engineering & Technology Co., Ltd.; Duan Yueqin, Process Expert at Saiding Engineering Co., Ltd.; Zhang Shuihe, General Manager of Henan Energy & Chemical Industry Group New Chemical Materials Co., Ltd.; and Luo Junjie, General Manager of Hubei Jinkong Gas Co., Ltd., a subsidiary of Jinneng Holding Equipment Manufacturing Group. The appraisal meeting was chaired by Wang Liqing, Secretary-General of the China Nitrogen Fertilizer Industry Association. Attending the meeting were leaders such as Gu Chaohui, Chief Engineer of Henan Xinlianxin Chemical Industry Group Co., Ltd., and Zhang Bing, Chairman of Tianjin Aozhan Xingda Chemical Technology Co., Ltd., along with relevant technical officials.

During the appraisal meeting, the expert panel inspected the plant site and listened to technical reports, work reports, techno-economic analysis reports, and novelty search reports submitted by the units that completed the project, as well as the application report provided by the user unit, Henan Xin Lian Xin Chemical Industry Group Co., Ltd. After questioning and discussion, the panel unanimously agreed that the “Methanol Vacuum Multi-effect Coupled Distillation Energy-saving Technology” had passed the scientific and technological achievement appraisal. The panel recognized that this technological breakthrough introduced a vacuum tower for the first time into methanol distillation units, and through a “five-tower 3+3-effect” thermal coupling process, it achieved hierarchical energy utilization, improved product quality, and reduced overall energy consumption. Possesses significant economic benefits. Achieving a domestically leading level.