Regeneration of a dehydrogenation catalyst slip-stream
AssigneeUop LLC
InventorsAvram M. Buchbinder, John J. Senetar, Wei Pan, Wolfgang A. Spieker, Richard A. Johnson, II
Life of this patent
Estimating the term…
Abstract
A fluidized catalytic reactor system cycles from 0.05-5% of catalyst at a time through a rejuvenation unit to be heated in the presence of oxygen to maintain catalyst activity. The use of the rejuvenation unit that may be 2% of the size of the main catalyst regeneration unit allows for reduction in equipment size and in catalyst inventory. The catalyst that is sent to the rejuvenation unit may be spent catalyst but may be partially or fully regenerated catalyst. The rejuvenation unit may be heated by combusting fuel or by hot flue gas.
Claims20
A system for contacting a reactant stream with a catalyst comprising:
- a reactor containing a quantity of catalyst;
- a catalyst regenerator unit having an inlet configured for entry of a spent catalyst stream into said catalyst regenerator unit from said reactor and an outlet configured for passage of a regenerated catalyst to said reactor;
- a catalyst rejuvenation unit configured for entry of a quantity of catalyst flow wherein said quantity of catalyst flow comprises about 0.05 to 5% of quantity of catalyst flow to the regenerator unit and further configured for passage of a rejuvenated catalyst stream from said catalyst rejuvenation unit;
- and
- a product outlet for discharging product from the reactor.
A process for managing or controlling catalyst activity comprising sending about 0.05 to 5% of catalyst flow within a propane dehydrogenation system to a catalyst rejuvenation unit wherein said system comprises a reactor, a catalyst regeneration unit and said catalyst rejuvenation unit and catalyst piping to send catalyst to and from each of said reactor, said catalyst regeneration unit and said catalyst rejuvenation unit.
Dependencies are inferred from the claim text.