Process for contacting high contaminated feedstocks with...

Details Process for contacting high contaminated feedstocks with... Process for contacting high contaminated feedstocks with...

2010-06-14

2011-11-22

Caldarola, Glenn (Department: 1771)

Mineral oils: processes and products

Chemical conversion of hydrocarbons

Cracking

Reexamination Certificate

active

08062506

ABSTRACT:
An FCC process comprising an enlarged riser section and a distributor in an elevated position and with an opening in its tip away from riser walls may reduce coke build-up along the interior walls of a riser. Catalytic mixing may be improved, which could reduce riser coking by increasing hydrocarbon contact with catalyst before contacting the riser wall. Increasing the distance between the introduction of the hydrocarbon and the riser wall may increase this likelihood for hydrocarbon-catalyst contact. Highly contaminated hydrocarbons cause greater coking than do normal hydrocarbons and this FCC process may be effective in decreasing riser coking on such heavy hydrocarbons.

REFERENCES:
patent: 3531398 (1970-09-01), Adams et al.
patent: 4534854 (1985-08-01), Weinberg et al.
patent: 4675099 (1987-06-01), Skraba
patent: 4713169 (1987-12-01), Nielsen

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