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On September 3, Shaanxi Coal Industry Chemical Technology Development Center Co.
4,4'-Methylenebiscyclohexylamine (H12MDA) is a kind of special amine.
MDA catalytic hydrogenation green preparation H12MDA technology uses 4,4'-methylene diphenylamine (MDA) as raw material, adopts self-developed new high-efficiency special catalyst, does not add high-polluting liquid caustic soda, and converts it into H12MDA, a new low-cost green process route
According to Wang Liguo, a researcher at the Institute of Process Engineering, Chinese Academy of Sciences, in view of the harsh reaction conditions, complex reaction system, low product selectivity in traditional processes, and the need to add lye to tetrahydrofuran solvent to suppress the side reactions of deamination and condensation, their research team innovatively proposed The preparation technology of low-load Ru-based catalyst on nitrogen-containing support forms a metal-N coordination center, provides abundant basic sites on the surface of the catalyst, realizes effective metal immobilization, and prevents particle agglomeration
Relying on the laboratory's small-scale technology, Shaanxi Coal Technology Center built a 100-ton MDA catalytic hydrogenation green preparation H12MDA pilot plant in Weinan, Shaanxi, which opened up the process flow and realized long-term safe and stable operation
Experts believe that the technology does not use lye, the "three wastes" emissions are reduced, the reaction conditions are mild, and it has the characteristics of green environmental protection and higher safety, and it is recommended to speed up its industrial application
Song Shuangtian, chairman of Shaanxi Coal Technology Center Co.