FIELD: chemistry.
SUBSTANCE: invention can be used for preparation of unsaturated carbon acids and their derivatives. Methacrolein and/or methacrylic acid are obtained by partial gas-phase oxidation of C3 and/or C4 compounds in the presence of heterogeneous friable catalyst. The process is carried out in the reactor containing one or more modules 1 of plate exchangers designed in the form of rectangular parallelepiped each of which is formed by two or more rectangular plate exchangers installed in parallel with each other. The reactor contains also the cylindrical body consisting of cylindrical cover 4 and bonnets 15, 16 which longitudinal axis is parallel to the plate exchangers plane.
EFFECT: economical and trouble-free product obtaining on an industrial scale.
29 cl, 21 dwg
