Ammoximation of cyclohexanone over nanoporous TS-1 using UHP as an oxidant

The Synthesis of 1,4-Diazabicyclo (2.2.2) Octane over a Pre-Treated Titanium Silicalite-1 Catalyst

“…It was similar to that of standard HZSM-5 zeolites confirming orthorhombic symmetry and location of Ti in zeolite framework. The XRD patterns of the zeolite sample TS-1 was all highly crystalline and matched with the reported literature [26]. In comparison with TS-1 and potassium chloride modified TS-1, it is clear from B = L ratio that the number of Lewis acid sites (LAS) are high in K-modified catalysts; however, the number of Brönsted acid sites (BAS) are low on K-TS-1 catalyst indicates that all the exchangeable sites are occupied with K. K-impregnation also leads to K-exchange to a good extent was evident from the decrease in BAS.…”

Reaction kinetics of cyclohexanone ammoximation over TS-1 catalyst in a microreactor

“…The other is the mechanism through hydroxylamine route. Hydroxylamine, formed by the reaction between ammonia and hydrogen peroxide on titanium centers (Sirijaraensre and Limtrakul, 2013), further reacts with cyclohexanone even without a catalyst (Reddy et al, 1991;Saxena et al, 2007). This mechanism is supported by the reported observation that ketones such as 4-tert-butylcyclohexanone can participate in the ammoximation reaction, although the bulky radical should prevent access to the zeolite channels (Kulkova et al, 1997).…”

Improving the performance of TS-1 catalysts for continuous cyclohexanone ammoximation through controlment of active species distribution

“…20,21 The cyclohexanone ammoximation using NH 3 and H 2 O 2 over TS-1 catalysts is an environmentally benign and effective catalytic reaction. [22][23][24][25] Some studies have focused on the catalytic properties of TS-1 in continuous cyclohexanone and acetone ammoximation. 26,27 The stable catalytic performances of TS-1 in this process maintained for 30 h in a tubular membrane reactor 27 and 100 h in a glass slurry reactor.…”