Tuning Lewis acid sites in TS-1 zeolites for hydroxylation of anisole with hydrogen peroxide

Enhanced anisole hydroxylation over a hierarchical micro/mesoporous TS-1 catalyst

“…14 TS-1-C INJ also forms PMP more selectively but the anisole conversion seems lower, since water is used as a solvent (Table 2, entry 8). 23 From the above discussion it is proved that the DTS-1 recyclable catalyst has excellent potential in the direct synthesis of methoxyphenols.…”

“…It was shown that introducing Ti-Lewis acid sites into the well crystalized TS-1 channels facilitates the selective production of the para -isomer, while a high concentration of external surface Ti-Lewis acid sites and low crystallinity lead to poor selectivity to the para -isomer. 23 Guo and coworkers also showed that the post-treatment using TPAOH and NaOH on the porous structure of TS-1 significantly improved its catalytic performance for phenol hydroxylation. The higher titanium content and faster diffusivity associated with the successive post-treatment significantly improve the catalytic performance of TS-1.…”

Reaction induced thermally stabilized TS-1 zeolite as a novel long-lasting catalyst for methyl lactate production

“…All samples exhibit strong absorption peaks near 205 and 330 nm, attributed to tetrahedral “TiO 4 ” species in the framework and extra-framework anatase TiO 2 , respectively. 11 a ,12 b ,14 This shows that titanium species did not change before and after pretreatment. Neither the TS-1 framework nor the states of Ti species were affected by the pretreatment with methanol.…”

Synthesis of ultra-fine TS-1 catalyst with high titanium content and its performance in phenol hydroxylation

“…Ever since Taramasso et al's pioneering study, 1 titanium silicalite-1 (TS-1), a molecular sieve with an MFI structure, has emerged as a highly efficient catalyst for various oxidation reactions using H 2 O 2 as an oxidant under mild reaction conditions. TS-1 is widely recognized as a pivotal catalyst, activating multiple reactions such as phenol hydroxylation, [2][3][4] olefin epoxidation, 5 hydroxylation of anisole, 6 ammoxidation of cyclohexanone, 7 and oxidative desulfurization. 8 However, TS-1 faces limitations in terms of intracrystalline diffusion due to its microporosity.…”