METHOD OF HYDRAULIC TREATMENT IN FLUIDIZED BED Russian patent published in 1998 - IPC

FIELD: chemical engineering. SUBSTANCE: in a fluidized-bed reactor, reaction product is subjected to evaporative high-pressure separation followed by evaporative middle-pressure separation. Liquid needed to maintain fluidized bed is formed on passing the liquid obtained after high- pressure separation through eductor into the liquid obtained after middle-pressure separation. Fluidized bed maintaining liquid is directed into reactor to increase catalyst bed volume to 110-200 vol % as compared to the volume of stationary catalyst bed. Such recirculation maintains the best pressure balance, whereas entrained catalyst particles are returned into reactor and do not get into other equipment. EFFECT: improved process conditions. 5 cl, 1 dwg