| http://www.w3.org/ns/prov#value | - ining oil, catalyst, and gas when said reactor is in an operating mode; (b) ebullating and expanding said catalyst bed, said reactor including means for recirculating at least some of said oil from a recirculation input near the top of said reactor to a recirculation outlet near the bottom of said reactor, said expanded bed having an upper level which is below said recirculation input and above sa
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