Back to results
US 4,141,858 AGranted
Passivating metals on cracking catalysts
AssigneePhillips Petroleum Company
InventorDwight L. McKay
Life of this patent
Estimating the term…
Abstract
Metals such as nickel, vanadium and iron contaminating a cracking catalyst are passivated by contacting the cracking catalyst under elevated temperature conditions with antimony selenide, antimony sulfide, antimony sulfate, bismuth selenide, bismuth sulfide, or bismuth phosphate.
Claims9
A modified cracking catalyst obtained by contacting a clay based cracking catalyst and at least one passivating compound selected from the group consisting of antimony selenide, antimony sulfide, antimony sulfate, bismuth selenide, bismuth sulfide and bismuth phosphate under elevated temperature conditions.
Dependencies are inferred from the claim text.