As of May 27, Shandong Aikesen Chemical Co., Ltd. has used the new m-phenylenediamine process independently developed by Qingdao University of Science and Technology. The production unit has been operating smoothly for 1 month, with a capacity of 10,000 tons, and all technical indicators have reached or met More than expected. The new process not only greatly reduces the production energy consumption, but also achieves efficient separation of o-, m-, and tri-diamine products, and the product purity reaches the level of polymerization (99.9%). This is the first time in the domestic industry. It is reported that the current production of m-phenylenediamine using a new process has begun to sell and approved by the majority of users. Exxon Chemicals is in the process of expanding its production of m-phenylenediamine projects. It plans to expand its annual production capacity to 30,000 tons and further develop downstream high value-added products. In view of the successful operation of this project, a Jiangsu company has also signed a framework agreement with the phenylenediamine task group of Qingdao University of Science and Technology. M-phenylenediamine is mainly used as a dye and a pharmaceutical intermediate. With the development of the world's textile and printing and dyeing industries, the use of m-phenylenediamine has expanded to aramid, resorcinol and other fields. However, most of the early domestic manufacturers used traditional technology - the production of m-phenylenediamine with the reduction of inter-dinitrophenyl iron powder, the product quality is generally not high, the production process is seriously polluted, and 3 tons of iron is discharged for each ton of m-phenylenediamine. Mud seriously pollutes the environment. In the production of metanitrobenzene, it is necessary to remove the o- and para-isomers formed in the nitrification reaction and discharge a large amount of difficult-to-treat wastewater. The entire production process has low yield and high cost. Although domestic companies have invested a large amount of human and material resources to develop new processes such as catalytic hydrogenation, the effects on catalyst activity and consumption, production energy consumption, and product purity are still not satisfactory. In response to the above problems, the Associate Professor Ding Jun Committee of Qingdao University of Science and Technology led the task force to develop a new type of hydrogenation catalyst with long life and high activity after 8 years of research. It consumes only 3 kilograms of catalyst per ton of product and is at the leading level in the industry. And the hydrogenation process drastically reduces the waste water discharge of m-phenylenediamine. Researchers also fully studied the separation process and energy balance of diamines and developed a coupled distillation process, which resulted in a significant reduction in production energy consumption. The energy consumption per ton of product was equivalent to about 0.15 tons of standard coal, and energy consumption in the same industry at home and abroad. The level of living in the advanced level. While reducing energy consumption, the project also achieved efficient separation of o-, m-, and tri-diamines, making the purity of domestic m-phenylenediamines reach the polymerization level for the first time. Processing Services,Parts Machining Service,Custom Single Punch Dies,Custom Progressive Die Ningbo Metal Sharing Supply Chain Management Co., Ltd , https://www.metalsharing.com