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Conflict of Interest: In relation to this article, we declare that there is no conflict of interest.

Publication history: Received October 20, 2009
Accepted December 21, 2009

This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Catalytic mechanism and reaction pathway of acetone ammoximation to acetone oxime over TS-1

Zhaohui Li^{1 2} Rizhi Chen¹ Wanqin Jin¹ Weihong Xing^1†

¹State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemistry and Chemical Engineering, Nanjing University of Technology, Nanjing 210009, China ²College of Chemistry and Biological Engineering, Changsha University of Science and Technology, Changsha 410076, China

xingwh@njut.edu.cn

Korean Journal of Chemical Engineering, September 2010, 27(5), 1423-1427(5)
https://doi.org/10.1007/s11814-010-0236-1

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Abstract

A series of two-step reactions and several special experiments were designed and carried out to discover the reaction pathway of acetone ammoximation to acetone oxime over titanium silicalites-1 (TS-1) employing 25 wt% ammonia and 30 wt% hydrogen peroxide as the ammoximation agents. The experimental results show that the acetone oxime can form even if there is no direct contact between acetone and TS-1 catalysts, indicating the hydroxylamine_x000D_ route may be the most important catalytic mechanism for the reaction. HPLC, GC/MS and ion chromatography characterization results show that hydrogen peroxide can oxidize acetone oxime to acetone, nitrite and nitrate in the presence of TS-1. In addition, nitrite and nitrate can form in the reaction of H2O2 and NH3 over TS-1. Based on these results, a possible overall reaction pathway of acetone ammoximation over TS-1 has been proposed.

Keywords

Acetone Acetone Oxime Ammoximation TS-1 Hydrogen Peroxide

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