Synthesis of Caprolactam through Dehydration and Cyclization of 6-Hydroxycaproamide-Reference-Cited by-同舟云学术

Synthesis of Caprolactam through Dehydration and Cyclization of 6-Hydroxycaproamide

Published:2024-03-08 Issue: Volume: Page:
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Author:

Zhai Chenghan¹,Ma Zhengxiang¹,Wang Yanji¹

Affiliation:

1. Hebei University of Technology

Abstract

Abstract The study focuses on the dehydration and cyclization of 6-hydroxycaproamide, a key raw material, into ε-caprolactam (CPL), an important polymer precursor. A bimetallic catalyst, Ru-Co/TiO2, was prepared using the impregnation method and characterized using XRD, XPS, H2-TPR, and TEM. The investigation delves into the impact of various parameters, including metal loading, choice of solvent, solvent ratio, catalyst dosage, and reaction time, on the yield of the final product. The findings demonstrate a significant synergistic effect between Ru and Co in the bimetallic Ru5Co6/TiO2 catalyst, leading to improved catalytic performance. Under the optimized reaction conditions (250°C, 1 MPa N2, 1,4-dioxane: NH3·H2O = 2:1 as the solvent ratio), the conversion rate of 6-hydroxycaproamide (6-HCM) reaches 99.0%, with a CPL yield of 62.2%.

Publisher

Research Square Platform LLC

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