High efficiency catalytic cracking stripping process

Details High efficiency catalytic cracking stripping process High efficiency catalytic cracking stripping process

1989-12-21

1990-11-06

McFarlane, Anthony

Mineral oils: processes and products

Chemical conversion of hydrocarbons

Cracking

208153, 208150, 502 41, 502517, 20415715, 20415751, C10G 1118

Patent

active

049684035

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.
patent: 4574038 (1986-03-01), Wan
patent: 4778666 (1988-10-01), Chu et al.

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