| abstract |
The present invention relates to an aqueous solvent comprising at least water from a reaction mixture obtained by oxidizing a substrate (e.g., a hydrocarbon) in the presence of an imide compound such as N-hydroxyphthalimide of formula (1) as an oxidation catalyst ( Oxidation reaction products (e.g. adipic acid, benzoic acid, butenediol) and oxidation using, for example, water) and non-aqueous solvents (e.g. methyl benzoate, benzonitrile) separable from the aqueous solvent The present invention relates to a method for efficiently separating a catalyst.n n n n n n n n n n Wheren n n R 1 and R 2 are substituents such as hydrogen atom and halogen atom; R 1 and R 2 may be bonded together to form a double bond or an aromatic or non-aromatic 5- to 12-membered ring; X is O or OH; n is 1 to 3. No decomposition of the oxidation catalyst is observed during the separation process. |