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Studies on the liquid-phase ammoximation of cyclohexanone over a titanium silicate sieve using on-line ATR–FTIR spectroscopy

Paper ID Volume ID Publish Year Pages File Format Full-Text
51515 46845 2010 5 PDF Available
Title
Studies on the liquid-phase ammoximation of cyclohexanone over a titanium silicate sieve using on-line ATR–FTIR spectroscopy
Abstract

The liquid-phase ammoximation of cyclohexanone over a titanium silicate sieve is followed in real time using on-line ATR–FTIR spectroscopy. We have discovered the formation and the vanishment of an intermediate during the reaction with the aid of on-line ATR–FTIR spectroscopy. A new possible reaction mechanism is proposed according to the experimental results. Hydrogen peroxide is firstly adsorbed on titanium silicate sieves, forming a complex peroxidic species of titanium, which can react with cyclohexanone to form an intermediate. Then the intermediate reacts with ammonia to give cyclohexanone oxime. The infrared spectra indicate that the intermediate has strong absorption of C–O bond.

Keywords
Cyclohexanone; Ammoximation; Mechanism; On-line ATR–FTIR; Titanium silicate sieves
First Page Preview
Studies on the liquid-phase ammoximation of cyclohexanone over a titanium silicate sieve using on-line ATR–FTIR spectroscopy
Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 11, Issue 10, 11 May 2010, Pages 887–891
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis