Fluid-bed reaction process

Mineral oils: processes and products – Chemical conversion of hydrocarbons – With preliminary treatment of feed

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208135, 208140, 585402, 585407, 585413, 585418, 585654, 585661, C10G 5700

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active

049293346

ABSTRACT:
An improved fluid-bed reaction process and apparatus are disclosed in which feedstock is preheated and may be at least partially converted by contacting the feedstock with spent catalyst in a preheat zone. Additional benefits include a reduction in catalyst poisons and coke production in the reaction zone. By contacting the fresh feed with hot spent catalyst, at least a portion of the coke which would otherwise form in the reactor is deposited on the spent catalyst. Temporary catalyst poisons are also sorbed onto the spent catalyst. The spent catalyst is then withdrawn from the preheat zone, stripped of entrained hydrocarbon and regenerated.

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