FIELD: industrial organic synthesis.
SUBSTANCE: invention relates to a process of catalytic oxidation in vapor phase, which prevents emergence of non-controllable reaction and premature poisoning of catalyst in (meth)acrylic acid synthesis. Vapor-phase catalytic oxidation process, wherein feed gas is supplied for oxidation to reaction tubes of multi-tubular reactor provided with multiple, disposed in reactor shell, reaction tubes filled with catalyst and multiple deflectors serving to modify direction of heat-carrier stream introduced into reactor shell. Temperature is measured in catalyst, which is placed in a reaction tube and is not connected with at least one deflector, as well as temperature in catalyst, which is placed in a reaction tube and is connected with all deflectors.
EFFECT: ensured continuous production of (meth)acrylic acid with high yield and for a long period of time.
12 cl, 6 dwg, 4 ex
