Passivating metals on cracking catalysts with antimony compounds
AssigneePhillips Petroleum Company
InventorDwight L. McKay
Life of this patent
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Abstract
Metals on a cracking catalyst are passivated by contacting the catalyst with at least one compound selected from the group of compounds having the general formula ##STR1## WHEREIN THE R groups which can be the same or different consist of hydrocarbyl radicals having 1 to about 18 carbon atoms per radical, the overall number of carbon atoms per molecule being 6 to about 90.
Claims11
A process for catalytic cracking of hydrocarbons wherein
- a. a hydrocarbon feed is introduced into a cracking zone,
- b. said feed is contacted in said cracking zone with the cracking catalyst under cracking conditions whereby the feed is cracked,
- c. the cracked feed is removed from said cracking zone for further processing, and
- d. metals deposited on said cracking catalyst and tending to deactivate said cracking catalyst are passivated
- by contacting said cracking catalyst with an antimony compound having the general formula ##STR4## wherein the radicals R which can be the same or different are hydrocarbyl radicals having from 1 to about 18 carbon atoms per molecule.
In a process for catalytic cracking of hydrocarbons, wherein a hydrocarbon feed is introduced into a cracking zone, said feed is contacted in said cracking zone with a cracking catalyst under cracking conditions whereby the feed is cracked, wherein the cracked feed is removed from the cracking zone for further processing, wherein the cracking catalyst is circulated from the cracking zone to a regeneration zone and back, the improvement comprising passivating contaminating metals deposited on said catalyst by contacting said catalyst with an antimony compound having the general formula ##STR5## wherein the R groups which can be the same or different are hydrocarbyl radicals each containing from 1 to about 18 carbon atoms.
Dependencies are inferred from the claim text.