PROCESS FOR PREPARING CYCLOALKANONE

摘要

A process for preparing cycloalkanone which comprises the steps of (A) contacting cycloalkane with molecular oxygen in the presence of an oxidation catalyst having an imide moiety represented by formula (I) wherein X represents an oxygen atom or a hydroxyl group (oxidation apparatus 2), (B) separating the catalyst, a by-produced acid component and derivatives thereof from the resulting reaction mixture (filter 3, extraction column 4, hydrolyzing apparatus 7 and sponification apparatus 8), and (C) separating cycloalkane, cycloalkanol and cycloalkanone from the reaction mixture (distillation columns 5, 6, 9 and 10). Also disclosed is a process comprising separating a first component containing cycloalkane (low boiling point component) and a second component containing cycloalkanone and cycloalkanol (high boiling point component) from the reaction mixture and then separating cycloalkanone and cycloalkanol from the high boiling point component. Such processes can be used for preparing cycloalkanone with high efficiency.