Compositions – Preservative agents – Anti-oxidants or chemical change inhibitants
Patent
1981-08-13
1983-08-02
Konopka, P. E.
Compositions
Preservative agents
Anti-oxidants or chemical change inhibitants
208164, 422144, B01J 2938, B01J 2120, C10G 1118
Patent
active
043965318
ABSTRACT:
A catalyst regeneration process and apparatus for the oxidative removal of coke from a coke contaminated fluid catalyst for use of the catalyst in a catalytic cracking reaction zone. The process comprises a high temperature coke combustion zone, a catalyst disengagement zone and an external heat removal zone comprising a shell and tube heat exchanger. A mixture of coke contaminated catalyst, and oxygen containing gas are contacted in the high temperature combustion zone. Catalyst is cooled by passing it through the shell side of the heat exchanger with a cooling medium through the tube side. The cooled catalyst is passed to the reaction zone. The catalyst is maintained in the cooling zone as a dense phase fluidized bed by passing a fluidizing gas into the bottom of the shell side. Steam is the preferred fluidizing gas. The rate at which fluidizing gas is passed to the bottom portion of the shell of the heat exchanger is adjusted to optimize the quantity of heat transferred to the cooling medium in the tubes, the passivation of contaminating metals on the catalyst and the stripping of inerts from the catalyst.
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Hoatson Jr. James R.
Konopka P. E.
Morris Louis A.
Page II William H.
UOP Inc.
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