尼龙-6 单体己内酰胺绿色生产技术

工程（英文） ›› 2017, Vol. 3 ›› Issue (3) : 379-384.

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工程（英文） ›› 2017, Vol. 3 ›› Issue (3) : 379-384. DOI: 10.1016/J.ENG.2017.03.003
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尼龙-6 单体己内酰胺绿色生产技术

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Green Production Technology of the Monomer of Nylon-6: Caprolactam

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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%.

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Green chemistry / Green engineering / Caprolactam / Production technology

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. . Engineering. 2017, 3(3): 379-384 https://doi.org/10.1016/J.ENG.2017.03.003

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Acknowledgements

This work was supported by the National Basic Research Program of China (2012CB224806).

Compliance with ethics guidelines

Baoning Zong, Bin Sun, Shibiao Cheng, Xuhong Mu, Keyong Yang, Junqi Zhao, Xiaoxin Zhang, and Wei Wu declare that they have no conflict of interest or financial conflicts to disclose.

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2017 2017 THE AUTHORS. Published by Elsevier LTD on behalf of the Chinese Academy of Engineering and Higher Education Press Limited Company. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
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