After two decades’endeavor,the Research Institute of Petroleum Processing has successfully developed a green caprolactam(CPL)production technology.The world’s first industrial plant based on this green CPL production technology has been built and possesses a capacity of 200 kt·a~(-1).Compared with existing technologies,the plant investment and production costs are pronouncedly reduced by 70%and 50%,respectively.In 2015,the capacity of this technology reached 3×10~6 t·a~(-1),making China the world’s largest CPL producer,with a global market share exceeding 50%. After two decades’ dedeavor, the Research Institute of Petroleum Processing has successfully developed a green caprolactam (CPL) production technology. The world’s first industrial plant based on this green CPL production technology has been built and possesses a capacity of 200 kt · a ~ -1) .Compared with existing technologies, the plant investment and production costs are pronounced reduced by 70% and 50% respectively.In 2015, the capacity of this technology reached 3 × 10 ~ 6 t · a -1, making China the world’s largest CPL producer, with a global market share exceeding exceeding 50%.