A process for the oxidation of propylene to acrylic acid and of isobutylen to methacrylic acid.

摘要

A combination of fixed and fluid-bed catalytic reactions is achieved by employing fixed-bed catalysts (3) on supports (4) within the fluid-bed (2). The fluid-bed catalysts (2) may move in both directions through the fixed bed (3), thereby giving advantages of both types of beds in one reactor (1).