Mineral oils: processes and products – Chemical conversion of hydrocarbons – Solids contacting and mixing
Patent
1984-05-30
1987-03-17
Doll, John
Mineral oils: processes and products
Chemical conversion of hydrocarbons
Solids contacting and mixing
208157, 208DIG1, 422143, C10G 1118, B01J 824
Patent
active
046505660
ABSTRACT:
Disclosed is a method and apparatus for feeding catalyst, oil and steam into a fluid catalytic cracking (FCC) riser. Oil passes through respective oil lines into a multiplicity of upwardly extending nozzles located at a lower portion of the riser, while steam passes through respective steam lines into the nozzles where it blends with the oil, with the combined oil and steam mixture being fed through the nozzles into the riser. Each oil line and steam line is provided with a valve to separately control oil and steam flow rates, respectively, in each of the nozzles to obtain a substantially constant catalyst to oil ratio across a horizontal cross-section of the riser. The substantially constant catalyst to oil ratio is represented by a substantially isothermal temperature profile across the horizontal riser cross-section, which is detected by measuring the temperature at various points along the horizontal cross-section. The oil and steam flow rates are adjusted by means of the valves until the isothermal temperature profile is achieved.
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Buyan Frank M.
Ross Mark S.
Caldarola Glenn A.
Doll John
Gilman Michael G.
Millop Alexander J.
Mobil Oil Corporation
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