HETEROGENEOUS CATALYTIC GASEOUS PHASE OXIDATION METHOD CONVERTING ACROLEIN TO ACRYLIC ACID AND TUBE BUNDLE REACTOR

PROBLEM TO BE SOLVED: To provide a heterogeneous catalytic gaseous phase oxidation method converting acrolein to acrylic acid, eliminating faults of technical level, and to provide a tube bundle reactor. SOLUTION: There is provided a heterogeneous catalytic gaseous phase oxidation method converting acrolein to acrylic acid, wherein the active materials of the catalyst is a specific multi-element oxidized material produced by a specific heat treatment method, and a bundle reactor comprising a specific number of catalyst tubes, wherein the catalytic tubes are filled with a filler, the catalyst contains as the active materials specific multi-element oxidized materials produced by a specific thermal treatment method, in that case, charge of the catalyst tube relating to partial oxidation converting acrolein to acrylic acid is performed on specific conditions to 12 catalyst tubes sampled at random and, as the standard of the activity of the catalyst tube filler, a temperature to be possessed by a specific salt bath is used. COPYRIGHT: (C)2011,JPO&INPIT