Patent ID: 6515171
Filing Date: 2003-02-04
Classification: C07B,C07C,Y02P

Abstract:
A process for separating an oxidation reaction product and an oxidation catalyst from a reaction mixture obtained by oxidation of a substrate selected from the group consisting of an hydrocarbon, an alcohol, an aldehyde, a ketone, an amine, an heterocyclic compound, a thiol and a sulfide in the presence of an imide compound shown by the formula (1) as the oxidation catalyst, which comprises using an aqueous solvent containing at least water and a non-water-soluble solvent separable from said aqueous solvent, thereby distributing the oxidation reaction product by phase separation into a layer of the aqueous solvent and the oxidation catalyst into an immiscible layer of the non-water-soluble solvent, wherein R1 and R2 independently represent a hydrogen atom, a halogen atom, an alkyl group, an aryl group, a cycloalkyl group, a hydroxyl group, an alkoxy group, a carboxyl group, an alkoxycarbonyl group, or an acyl group, or R1 and R2 may bond together to form a double bond, or an aromatic or non-aromatic ring, and the aromatic or non-aromatic ring formed by R1 and R2 may have 1 or 2 of an imide unit shown by the following formula: and X indicates an oxygen atom or a hydroxyl group and said aromatic or non-aromatic ring may have substituents R3, R4, R5 and R6 wherein each represents a hydrogen atom, an alkyl group, an hydroxyl group, an alkoxy group, a carboxyl group, an alkoxy carbonyl group, a acyl group, a nitro group, a cyano group, an amino group, or a halogen atom.