Passivation of metal contaminated cracking catalysts
This patent describes a process for the catalytic cracking of hydrocarbon feedstocks wherein an antimony-containing metals passivating agent is discharged through a sidewall of a catalytic cracking unit having a hydrocarbon cracking zone and a catalyst regeneration zone. The improvement consists contacting the antimony-containing metal passivating agent with a dispersing agent within a nozzle having an inside wall surface defining a chamber, wherein the chamber has an upstream end portion and a downstream end portion. The chamber downstream end portion has a discharge end portion which opens into the catalytic cracking unit sidewall and discharges a dispersed antimony-containing metals passivating agent into the catalyst regeneration zone of the catalytic cracking unit. The temperature within the catalyst regeneration zone exceeds the melting point of the antimony-containing metals passivating agent. The dispersing agent is introduced into the chamber upstream end portion through a dispersing agent introduction means having an injection end portion which opens into the chamber upstream end portion. Then, the antimony-containing metals passivating agent is introduced into the chamber upstream end portion through a metals passivating agent introduction means having an injection end portion which opens into the chamber upstream end portion at a point downstream of the dispersing agent introduction means discharge end portion.
- Assignee:
- Phillips Petroleum Co., Bartlesville, OK
- Patent Number(s):
- US 4816134
- OSTI ID:
- 6080348
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
020400* -- Petroleum-- Processing
ANTIMONY
CATALYSTS
CATALYTIC CRACKING
CHEMICAL COMPOSITION
CHEMICAL REACTIONS
CHEMICAL REACTORS
CORROSION INHIBITORS
CORROSION RESISTANCE
CRACKING
DECOMPOSITION
ELEMENTS
ENERGY SOURCES
FOSSIL FUELS
FUELS
METALS
PASSIVATION
PETROLEUM
PYROLYSIS
THERMOCHEMICAL PROCESSES