Selective oxidation of aldehydes by oxygen over macroporous alkaline resin

Abstract

OH-type macroporous strong-base resin was evaluated as a heterogeneous catalyst for the oxidation of aldehydes to corresponding carboxylic acids by molecular oxygen. A wide range of aldehydes, such as aromatic,...

Selective aerobic oxidation of aliphatic aldehydes: the critical role of percarboxylate anion on the selectivity

“…The influence of alkali metal salts or carboxylate on the selectivity of aerobic oxidation of aliphatic aldehydes has been claimed in patents [24][25][26] and was recently studied using macroporous alkaline resins. 16 Such salts are supposed to inhibit undesired reactions. 25 Even if a publication has questioned the influence of salts, 13 we have reproduced these results in solution 15 or neat using microreactors.…”

“…Nevertheless, the problem of selectivity for aliphatic aldehydes, particularly for β-substituted aliphatic aldehydes remains. 8,10,11,[13][14][15][16][17] A carboxylic acid selectivity between 70% and 90% without additives was observed for 2-ethylhexanal 1, an industrially important chemical intermediate. 18 It has already been shown that the selectivity towards 2-ethylhexanoic acid 6 was also dependent on the solvent.…”

Study on the Effects of Fe Doping on C‐ZFe Catalyst for Catalytic Removal of NO from the Low‐Temperature Flue Gas

“…Selective catalytic reduction technology (SCR) has a potential of its high efficiency, and is widely used to remove NO in thermal power stations [4,5] . The catalytic activity temperature of the catalyst in SCR is 300–400 °C [6–8] . However, the flue gas's emission temperature in sintering is 20–180 °C [9,10] .…”