In-situ synthesis of hydrogen peroxide in tandem with selective oxidation reactions: A mini-review

The effects of impregnation of precious metals on the catalytic activity of titanium silicate (TS-1) in epoxidation of propene using hydrogen peroxide

“…In several liquid-phase epoxidation routes to convert propene into propene oxide, much attention has been directed to heterogeneous catalytic oxidation using hydrogen peroxide as a more environmentally benign and profitable chemical process [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15]. Titanium silicalite (TS-1) catalyst has been extensively investigated for this route because propene oxide can be produced with a high selectivity in methanol under mild conditions [4,5,[10][11][12][13][14][15][16][17][18][19][20][21][22][23]. The direct epoxidation process based on hydrogen peroxide (oxidant) and TS-1 (catalyst) was commercialized and referred to as "hydrogen peroxide-to-propene oxide" (HPPO) process.…”

“…It is anticipated that the direct gas-phase epoxidation of propene using O 2 or a mixture of O 2 and H 2 might take over the next generation after the HPPO process, but currently available catalysts have difficulty in attaining sufficient conversion of propene for commercial application [1,3,14,26]. Therefore, several attempts have been made to utilize hydrogen peroxide produced in-situ from a mixture of H 2 and O 2 gas for a liquid-phase epoxidation process [5,14,25,[27][28][29][30][31][32][33][34][35][36].…”

“…Therefore, several attempts have been made to utilize hydrogen peroxide produced in-situ from a mixture of H 2 and O 2 gas for a liquid-phase epoxidation process [5,14,25,[27][28][29][30][31][32][33][34][35][36]. For this purpose, the TS-1 catalyst modified by the impregnation of precious metals such as palladium, platinum and gold has been used to generate hydrogen peroxide and oxidize propene at the same time.…”

Propylene epoxidation with hydrogen peroxide in acidic conditions

“…The challenge raised to the scientific community has always been to improve the current technological state of the art towards more sustainable, green, economically advantageous and efficient processes (Cavani and Teles, 2009). This explains the increased interest in a small and rather simple molecule such as hydrogen peroxide (H 2 O 2 ) (Clerici and Ingallina, 1998;Puertolas et al, 2015;Ishihara et al, 2015). H 2 O 2 is known to be a very strong and versatile oxidizing agent and green compound due to only water formed as a by-product (CamposMartin et al, 2006;Landon et al, 2003;Garcia-Serna et al, 2014;Samanta, 2008).…”

“…Oxidations are an extremely important class of reactions largely utilized in the chemical industry (Clerici and Ingallina, 1998;Puertolas et al, 2015). The challenge raised to the scientific community has always been to improve the current technological state of the art towards more sustainable, green, economically advantageous and efficient processes (Cavani and Teles, 2009).…”