Passivation of FCC catalysts

Patent · Tue Jul 22 04:00:00 EDT 1986

OSTI ID:5331778

Forester, D R; Barlow, R C

This patent describes a process comprising: (a) contacting a hydrocarbon feedstock with a fluidized zeolite-containing cracking catalyst in a cracking zone under cracking conditions; (b) recovering the cracked product; (c) passing the cracking catalyst from the cracking zone to a regeneration zone; (d) regenerating the cracking catalyst in the regeneration zone by contact with oxygen-containing gas under regeneration conditions to produce a regenerated catalyst; and (e) introducing the regenerated catalyst to the cracking zone for contact with the hydrocarbon feedstock; wherein the catalyst during the cracking process is eventually contaminated with from about 500 to 10,000 parts per million parts of catalyst with vanadium contained in the feedstock, which vanadium would at regeneration temperatures and conditions affect the catalyst in a manner which would detrimentally affect its efficiency upon being reintroduced to the cracking zone for reuse. The improvement described here consists of treating the vanadium contaminated cracking catalyst prior to its reaching equilibrium and prior to the subjection thereof to regeneration temperatures with a material consisting essentially of tin or a source thereof, the amount of tin utilized being from 1 to 1999 ppm of catalyst.

• Assignee: Betz Labs., Inc., Trevose, PA
• Patent Number(s): US 4601815
• OSTI ID: 5331778
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
400301* -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
CATALYSTS
CATALYTIC CRACKING
CATALYTIC EFFECTS
CHEMICAL REACTIONS
CRACKING
DECOMPOSITION
ELEMENTS
EQUILIBRIUM
FLUIDIZED BEDS
HYDROCARBONS
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
MATERIALS
METALS
MINERALS
NONMETALS
ORGANIC COMPOUNDS
OXYGEN
PASSIVATION
PYROLYSIS
QUANTITY RATIO
REGENERATION
TEMPERATURE EFFECTS
THERMOCHEMICAL PROCESSES
TIN
TRANSITION ELEMENT COMPOUNDS
VANADIUM COMPOUNDS
ZEOLITES