Electrolysis: processes – compositions used therein – and methods – Electrolytic coating – Coating is discontinuous single metal or alloy layer
Patent
1984-06-08
1985-07-30
Gantz, D. E.
Electrolysis: processes, compositions used therein, and methods
Electrolytic coating
Coating is discontinuous single metal or alloy layer
502 41, 208DIG1, 34 54, B01J 2938, C10G 1118
Patent
active
045320250
ABSTRACT:
Spent catalyst is continuously regenerated in a fluid catalytic cracking system by forcing air to flow through such a catalyst bed to burn carbonaceous material from it and to heat such catalyst for fluid catalytic contact with a hydrocarbon feed stream in a reactor transfer line or riser.
The combustion of carbonaceous material is optimized by controlling the rate of air flow through the bed, supported on an open grid having openings which are substantially larger than the average diameter of the catalyst particles. This assures even air flow throughout the bed. Such air flow is optimized by collecting catalyst that may backflow under low flow conditions from below one of the lowest grid openings. The particles are withdrawn from a collector in a minor portion of the air flowing to the catalyst bed. The presence of catalyst is detected either by direct observation or by temperature measurement. The flow rate of air to the regenerator is adjusted to maintain a desired regeneration rate to minimize or prevent backflow of catalyst particles through said grid openings but without excess air flow which would cool the catalyst or require addition of torch oil to achieve a given heat content of the catalyst to be reacted in the process, or cause overloading of the exhaust gas cyclones by catalyst particles or fines.
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Chevron Research Company
Gantz D. E.
Johnson Lance
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