Mineral oils: processes and products – Chemical conversion of hydrocarbons – Solids contacting and mixing
Patent
1989-04-12
1992-04-14
Warden, Robert J.
Mineral oils: processes and products
Chemical conversion of hydrocarbons
Solids contacting and mixing
208113, 208161, 208164, 422144, 422145, 422147, C10G 1118, F27B 1509, F27B 1512, B01J 818
Patent
active
051045192
ABSTRACT:
Disclosed is a method of and apparatus for reducing the level of extremely small catalyst particles ("fines") in an FCC system by temporarily retaining particles separated from the secondary cyclone separator in either a reactor vessel or catalyst regenerator. These particles can be withdrawn from the temporary retaining area, which takes them out of the active catalyst inventory within the reactor/regenerator system. The withdrawing of catalyst "fines" reduces the particulate contamination both in flue gas exhausted to the atmosphere from the catalyst regenerator and in the main column bottom (MCB) products from the fractionation stage. Preferred embodiments includes withdrawal of "fines" from either the regenerator or the reactor vessels and the secondary cyclones contained in each of these vessels.
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Haddad James H.
Owen Hartley
McKillop A. J.
Mobil Oil Corporation
Santiago Amalia
Speciale C. J.
Stone Richard D.
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