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 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.
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Li, Z., Chen, R., Jin, W. et al. Catalytic mechanism and reaction pathway of acetone ammoximation to acetone oxime over TS-1. Korean J. Chem. Eng. 27, 1423–1427 (2010). https://doi.org/10.1007/s11814-010-0236-1
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DOI: https://doi.org/10.1007/s11814-010-0236-1