Patent ID: 6462232
Filing Date: 2002-10-08
Classification: C07C

Abstract:
A process for subjecting acrolein or acrolein-containing gas to catalytic vapor phase oxidation to produce acrylic acid in a reactor having an inlet and an outlet, comprising, controlling he reaction so that the following equations (1) and (2) are satisfied:1Â° C.&lE;T0âˆ’T1&lE;15Â° C.â€ƒâ€ƒ(1) T12â€ƒâ€ƒ(2) wherein T0 represents a temperature of acrolein or the acrolein-containing gas fed to the inlet of the reactor; T1 represents a temperature in an inlet part of the catalyst layer; and T2 represents a temperature in an outlet part of the catalyst layer.