Mineral oils: processes and products – Chemical conversion of hydrocarbons – Solids contacting and mixing
Patent
1984-11-02
1989-03-07
McFarlane, Anthony
Mineral oils: processes and products
Chemical conversion of hydrocarbons
Solids contacting and mixing
208113, 208153, 208161, C10G 1118
Patent
active
048103608
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 a reactor vessel or catalyst regenerator. These particles can be intermittently withdrawn from the temporary retaining area in order to achieve particle flow at a low volume rate, which takes them out of the active catalyst inventory within the reactor/regenerator system. The intermittent withdrawing of catalyst "fines"]reduces the particulate contamination both in flue gas exhausted to the atmosphere from the catalyst regenreator and in the main column bottom (MCB) produces from the fractionation stage. Preferred embodiments include intermittent 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
Schatz Klaus W.
McFarlane Anthony
McKillop Alexander J.
Mobil Oil Corp.
Santini Dennis P.
Speciale Charles J.
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