Moving Bed Hydrocarbon Conversion Process
OwnerChristopher Naunheimerinventor
Life of this patent
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Abstract
Moving bed hydrocarbon conversion processes are provided for contacting a catalyst moving downward through a reaction zone with a hydrocarbon feed, withdrawing the catalyst from the reaction zone and conveying the catalyst to a regeneration zone wherein the catalyst moves downward. The catalyst is withdrawn from the regeneration zone and passed downward to an upper zone of a particle transfer apparatus wherein the transfer of catalyst from the upper zone through a middle zone to a lower zone is regulated by varying the pressure of the middle zone, the flow rate of gas passing through an upper valveless conduit, and a valve in a lower valved conduit. The catalyst from the lower zone of the particle transfer apparatus is conveyed to the reactions zone.
Claims20
A moving bed hydrocarbon conversion process comprising:
- (a) contacting a catalyst moving downward through a reaction zone with a hydrocarbon feed;
- (b) withdrawing the catalyst from the reaction zone;
- (c) conveying the catalyst to a regeneration zone wherein the catalyst moves downward through the regeneration zone;
- (d) withdrawing the catalyst from the regeneration zone and passing the catalyst downward to an upper zone of a particle transfer apparatus;
- (e) transferring the catalyst downward from the upper zone of the particle transfer apparatus to a middle zone of the particle transfer apparatus through an upper valveless conduit of the particle transfer apparatus;
- (f) increasing the middle zone pressure;
- (g) opening a valve in a lower valved conduit of the particle transfer apparatus;
- (h) transferring the catalyst downward from the middle zone to a lower zone of the particle transfer apparatus through the lower valved conduit, and transferring gas from the middle zone upward through the upper valveless conduit into the upper zone of the particle transfer apparatus;
- (i) closing the valve in the lower valved conduit;
- (j) decreasing the middle zone pressure;
- and
- (k) conveying the catalyst from the lower zone to the reaction zone;
- wherein a pressure of the lower zone is greater than a pressure of the upper zone.
Dependencies are inferred from the claim text.