Mineral oils: processes and products – Chemical conversion of hydrocarbons – Cracking
Patent
1999-02-19
2000-10-31
Griffin, Walter D.
Mineral oils: processes and products
Chemical conversion of hydrocarbons
Cracking
208106, 208151, 208164, C10G 1100, C10G 3500
Patent
active
061397202
ABSTRACT:
The production of carbon monoxide as a combustion off-gas is maximized by the use of a hot stripping zone arrangement that provides catalyst mixing to establish a uniform catalyst temperature and thorough contacting of the well-mixed hot catalyst in a confined portion of the hot stripping zone. The hot stripping zone delivers the hot stripped catalyst to a bubbling-bed regeneration zone by an oxygen-starved lift stream that distributes the catalyst to the top of the bubbling-bed in the regeneration zone. The process delivers spent catalyst with about 1 wt % of coke to the reaction zone and a spent combustion gas or flue gas stream having a CO.sub.2 to CO ratio of at least 1. The operation reduces the heat evolution in the regeneration step and allows relatively low temperature operation of the regeneration zone without use of catalyst coolers.
REFERENCES:
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patent: 4455220 (1984-06-01), Parker et al.
patent: 4464250 (1984-08-01), Myers et al.
patent: 4789458 (1988-12-01), Haddad et al.
patent: 5043517 (1991-08-01), Haddad et al.
patent: 5141625 (1992-08-01), Lomas
Griffin Walter D.
Nguyen Tam M.
Tolomei John G.
UOP LLC
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