Chemical apparatus and process disinfecting – deodorizing – preser – Chemical reactor – Fluidized bed
Patent
1994-05-17
1995-10-31
Warden, Robert J.
Chemical apparatus and process disinfecting, deodorizing, preser
Chemical reactor
Fluidized bed
422139, 422144, 422145, 422200, 422201, 422205, 208113, 502 41, 502 42, 502 44, B01J 818, B01J 2034, F27B 1514, F28D 700
Patent
active
054627176
ABSTRACT:
Apparatus and processes are disclosed for carrying out chemical reactions of the type in which a fluidized particulate solid is contacted with reactants in a reaction vessel or conduit and then separated from the reactant products and regenerated in a regeneration process, such as combusting the carbonaceous deposit which accretes on fluid catalytic cracking catalyst particles. The regeneration reaction may change the temperature of the regenerated catalyst particles and in such case it is often required to subject the particles to heat exchange to provide them at a temperature suitable for recirculation to the reaction zone. The processes and apparatus of the invention essentially provide for dividing the fluidized solids regeneration bed into an uppermost bed zone and at least one lower bed zone by a horizontal occlusion zone disposed at a vertically intermediate portion of the bed. The regeneration is fully or partially carried out in the uppermost bed zone, and further regeneration of and/or heat exchange with the regenerated particles is carried out in the occlusion zone and/or the lower bed zone. The intermediate occlusion zone inhibits backmixing of the fluidized particles, thereby permitting suitable temperature differences to be maintained between the fluidized beds.
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Kim Christopher Y.
Libert Victor E.
Spaeth Frederick A.
Warden Robert J.
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