Phillips Petroleum Company

Kelly G Knopp

William C Rahlwes

Edward L Sughrue

Jerald A Howell

Paul A Aegerter, Jr

Allen S Lasater

For upgrading heavy slurry oil containing catalyst fines from a catalytic cracking operation, the viscosity of the slurry oil is lowered in a hydrovisbreaking process step. In a preferred embodiment an admixture of the fines containing slurry oil and a metal containing resid oil fraction, resulting from a crude distillation, is passed through the hydrovisbreaker. The hydrovisbreaker effluent is separated into higher and lower boiling fractions with the lower boiling fraction preferably passed through a cracking unit so as to covert the lower boiling fraction to lower molecular weight hydrocarbon products.

Refining of heavy slurry oil fractions

Catalytic regenerators, nozzle designs and processes suitable for introducing regeneration air into a catalytic cracking unit which substantially reduce erosion induced nozzle failures include at least one nozzle which has at least one planar surface generally parallel to the nozzle's longitudinal axis.

Catalyst regeneration

This invention provides a nozzle for discharging a relatively small amount of a metals passivating agent into a catalytic cracking unit at a relatively high velocity through a relatively large diameter opening. This invention further provides a process for discharging a relatively small amount of a metals passivating agent into a high-temperature zone of a catalytic cracking unit, wherein the temperature range of the high-temperature zone exceeds the melting point of the particular passivating agent, through the utilization of a metals passivating agent injection nozzle which disperses the passivating agent, prior to discharging the agent into a catalytic cracking system, and accelerates this dispersed metals passivating agent to a maximum discharge velocity by injecting a dispersing agent into the novel nozzle at a location behind that at which the passivating agent is injected, and then discharging the dispersed metals passivating agent at a relatively high velocity through a passage having a relatively large inside diameter.

Passivation of metal contaminated cracking catalysts

Catalytic regenerators, nozzle designs and processes suitable for introducing regeneration air into a catalytic cracking unit which substantially reduce erosion induced nozzle failures, include at least one nozzle which has at least one planer surface generally parallel to the nozzle's longitudinal axis. In another embodiment, at least one nozzle has a plurality of planer surfaces generally parallel to the nozzle's longitudinal axis.

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Bartlesville, OK, United States of America

Kelly G Knopp