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A novel approach for one-step forming ε-caprolactam from cyclohexane nitrozation catalyzed by transition metal salt

Chinese Chemical Letters 2007年第3期18卷 269-271页

作者： Li Qiu Mao Bo Hua Wu Du Lin Yin Kui Yi You Ping Le Liu He An Luo College of Chemical Engineering Xiangtan University Xiangtan 411105 China Institute of Fine Catalysis and Synthesis Hunan Normal University Changsha 410081 China

The nitrozation reaction of cyclohexane in one-step reaction to form ε-caprolactam has been studied using transition metal salt as catalysts in this work. The results indicated that the catalysts play an especially important role. This method is expected to be a novel way to synthesize other lactam by similar reaction. The possible mechanism was suggested.

关键词： Cyclohexane Nitrozafion Transition metal salt ε-caprolactam

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The Effect of Platinum on Stability of the B_2O_3/TiO_2-ZrO_2 Catalyst for Beckmann Rearrangement of Cyclohexanone Oxime

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Chinese Chemical Letters 2006年第8期17卷 1025-1028页

作者： Dong Sen MAO Guan Zhong LU Research Institute Applied Catalysis Department of Chemical Engineering Shanghai Institute of Technology Shanghai 200235

The addition of platinum over the B2O3/TiO2-ZrO2 remarkably enhanced its catalytic stability in the vapor phase Beckmann rearrangement of cyclohexanone oxime under the carder gas of H2. The content of coke deposited on catalyst surface was decreased from 1.92% over the B2O3/TiO2-ZrO2 to 1.14% over the platinum promoted B2O3/TiO2-ZrO2 after reaction of six hours. This result indicates that the platinum added on the B2O3/TiO2-ZrO2 catalyst plays an important role in reducing the coke formation on the catalyst surface.

关键词： Cyclohexanone oxime vapor-phase Beckmann rearrangement ε-caprolactam B2O3/TiO2-ZrO2 catalyst platinum.

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Influence of Na^(+) on the synthesis of silicalite-1 catalysts for use in the vapor phase Beckmann rearrangement of cyclohexanone oxime

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Frontiers of Chemical Science and Engineering 2011年第4期5卷 401-408页

作者： Rumin YANG Fanhui MENG Xiao WANG Yaquan WANG Key Laboratory for Green Chemical Technology School of Chemical Engineering and TechnologyTianjin UniversityTianjin 300072China

Silicalite-1 was hydrothermally synthesized in the presence of different concentrations of Na+using tetrapropylammonium hydroxide(TPAOH)as a *** synthesis was followed by a base *** silicalite-1samples were characterized using X-ray diffrac-tion,scanning electron microscopy,N2 adsorption,X-ray photoelectron spectroscopy,Fourier transform infrared spectroscopy and NH3 temperature-programmed *** samples were used as catalysts for the vapor phase Beckmann rearrangement of cyclohexanone *** the synthesis,the sodium ions were incorporated onto the silicalite-1 crystals,but were then removed by the base *** the catalysts exhibited nearly complete conversion of cyclohexanone oxime toε-caprolactam with selectivities grater than 95%.Addition of less than 2.5 mol-%Na^(+)(relative to TPAOH)did not inﬂuence the catalytic ***,for Na+concentrations≥5 mol-%,the particle sizes of silicalite-1 increased and the catalytic activities decreased,which can be attributed to carbon *** results in this work are of great importance for the polymer industry.

关键词： silicalite-1 cyclohexanone oxime vapor phase Beckmann rearrangement ε-caprolactam

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