Tungstate-exchanged Mg-Al layered double

A tungstate-exchanged Mg-Al layered double hydroxide (LDH) was employed to catalyze oxidation of aliphatic tertiary amines to N-oxides by 30% aqueous H2O2 (Table 8.8) [117]. The reaction takes 1-3 h at room temperature. The use of dode-cylbenzenesulfonic acid sodium salt as an additive increased the rate of the oxidation by a factor of 2-3 except for N-methyl morpholine. An advantage with the LDH-W04 catalyst is that it can be reused. 

---