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Engineering    2017, Vol. 3 Issue (3) : 379 -384     https://doi.org/10.1016/J.ENG.2017.03.003
Research |
Green Production Technology of the Monomer of Nylon-6: Caprolactam
Baoning Zong(),Bin Sun,Shibiao Cheng,Xuhong Mu,Keyong Yang,Junqi Zhao,Xiaoxin Zhang,Wei Wu
Research Institute of Petroleum Processing, China Petrochemical Corporation , Beijing 100083, China
Abstract
Abstract  

After two decades’ endeavor, the Research Institute of Petroleum Processing (RIPP) has successfully developed a green caprolactam (CPL) production technology. This technology is based on the integration of titanium silicate (TS)-1 zeolite with the slurry-bed reactor for the ammoximation of cyclohexanone, the integration of silicalite-1 zeolite with the moving-bed reactor for the gas-phase rearrangement of cyclohexanone oxime, and the integration of an amorphous nickel (Ni) catalyst with the magnetically stabilized bed reactor for the purification of caprolactam. 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 is pronouncedly reduced, and the nitrogen (N) atom utilization is drastically improved. The waste emission is reduced significantly; for example, no ammonium sulfate byproduct is produced. As a result, the price difference between CPL and benzene drops. In 2015, the capacity of the green CPL production technology reached 3?×?106?t·a−1, making China the world’s largest CPL producer, with a global market share exceeding 50%.

Keywords Green chemistry      Green engineering      Caprolactam      Production technology     
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Corresponding Authors: Baoning Zong   
Just Accepted Date: 10 May 2017   Online First Date: 13 June 2017    Issue Date: 30 June 2017
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Baoning Zong
Bin Sun
Shibiao Cheng
Xuhong Mu
Keyong Yang
Junqi Zhao
Xiaoxin Zhang
Wei Wu
Cite this article:   
Baoning Zong,Bin Sun,Shibiao Cheng, et al. Green Production Technology of the Monomer of Nylon-6: Caprolactam[J]. Engineering, 2017, 3(3): 379 -384 .
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http://engineering.org.cn/EN/10.1016/J.ENG.2017.03.003     OR     http://engineering.org.cn/EN/Y2017/V3/I3/379
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