Mineral oils: processes and products – Chemical conversion of hydrocarbons – Solids contacting and mixing
Patent
1987-06-15
1988-12-06
Chaudhuri, Olik
Mineral oils: processes and products
Chemical conversion of hydrocarbons
Solids contacting and mixing
208164, 208159, 502 34, C10G 1118
Patent
active
047894580
ABSTRACT:
A fluid catalytic cracking (FCC) process and apparatus is described which includes a high temperature stripper (hot stripper) to control the carbon level, hydrogen level, and sulfur level on spent catalyst, followed by single or multi-stage regeneration. The high temperature stripper may operate at a temperature between 100.degree. F. above the temperature of a catalyst hydrocarbon mixture exiting a riser and 1500.degree. F. The regenerator may operate at a temperature between 100.degree. F. above that of the catalyst in the hot stripper and 1600.degree. F. Hot regenerated catalyst recycles to the hot stripper to maintain the hot stripper temperature. The present invention has the advantage that it separates hydrogen from catalyst to eliminate hydrothermal degradation, and separates sulfur from catalyst as hydrogen sulfide and mercaptans which are easy to scrub. The present invention also provides a method and apparatus for converting a TCC unit to a FCC unit, with maximum use of the TCC unit.
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Haddad James H.
Owen Hartley
Schatz Klaus W.
Chaudhuri Olik
Gilman Michael G.
McKillop Alexander J.
Mobil Oil Corporation
Stone Richard D.
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