Chemical apparatus and process disinfecting – deodorizing – preser – Chemical reactor – Fluidized bed
Patent
1990-08-09
1991-12-17
Warden, Robert J.
Chemical apparatus and process disinfecting, deodorizing, preser
Chemical reactor
Fluidized bed
422146, 422147, F27B 1514, B01J 824
Patent
active
050733494
ABSTRACT:
A catalytic cracking process operates with enhanced stripper efficiency by subjecting spent catalyst to microwave radiation before catalyst regeneration. Preferably the microwave frequency is one which ignores the catalytic cracking catalyst and preferentially excites the hydrocarbon or coke on the spent catalyst, the stripping steam conventionally used, or both the stripping steam and the hydrocarbonaceous coke. In preferred embodiments, microwave frequencies are used which are selective for various impurities in the coke, such as sulfur and/or nitrogen impurities. Additives, such as ferrous materials, may be added to augment the efficiency of desulfurization during stripping. The process is applicable to fluidized catalytic cracking and moving bed catalytic cracking units.
REFERENCES:
patent: 3503865 (1970-03-01), Stone
patent: 4144189 (1979-03-01), Kirkbride
patent: 4279722 (1981-07-01), Kirkbride
patent: 4545879 (1985-10-01), Wan et al.
Herbst Joseph A.
Markham Catherine L.
Sapre Ajit V.
Teitman Gerald J.
McKillop A. J.
Mobil Oil Corporation
Santiago Amalia
Speciale C. J.
Stone Richard D.
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