Catalytic reforming catalyst activation
AssigneePhillips Petroleum Company
InventorFan-Nan Lin
Life of this patent
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Abstract
Catalyst activation of a platinum reforming catalyst system contained in a multiple reactor system by simultaneously reducing the catalyst with hydrogen while introducing a nonmetallic chlorine-containing compound into a reactor of the multiple reactor system in an amount to add from about 0.05 to about 0.3 weight percent chlorine to the catalyst and thereafter purging the system with about 100 to about 50,000 cubic feet of hydrogen per cubic foot of catalyst resulting in a reforming system having increased activity and providing enhanced RON values with reduced cracking of feedstock.
Claims20
A process for regenerating a deactivated reforming catalyst contained in a multiple reaction zone system and which has become deactivated through employment in the reforming of a hydrocarbon, said process comprises:
- (a) purging said multiple reaction zone system with an inert gas;
- (b) subjecting said deactivated reforming catalyst to an oxidative burning off at a temperature and for a period of time sufficient to remove substantially all carbonaceous deposits thereon thereby providing a substantially carbon free catalyst;
- (c) subjecting said substantially carbon free catalyst to an oxygen treatment with a gas containing molecular oxygen at a temperature and for a time sufficient to effect the oxidation of the metals contained in said substantially carbon free catalyst thereby providing an oxidized catalyst;
- (d) purging said oxidized catalyst of molecular oxygen thereby providing a purged catalyst;
- (e) cooling said purged catalyst thereby providing a cooled catalyst;
- (f) reducing said cooled catalyst with hydrogen, said hydrogen being introduced into a reaction zone of said multiple reaction zone system;
- and (g) simultaneously with step (f) contacting said cooled catalyst with a chlorine-containing compound by introducing said chlorine-containing compound into said reaction zone of said multiple reaction zone system under conditions to effect decomposition of said chlorine-containing compound thereby providing a chlorine-treated catalyst having from about 1.05 to about 1.3 weight percent chlorine, based on the total weight of said chlorine-treated catalyst.
In a process for reforming naphthene and paraffin-containing petroleum hydrocarbons of gasoline or naphtha boiling range in the presence of molecular hydrogen wherein there is employed a multiple reaction zone system to provide reformates, the improvement which comprises utilizing in said multiple reaction zone system a chlorine-treated catalyst regenerated and activated by:
- (a) purging said multiple reaction zone system with an inert gas;
- (b) subjecting a deactivated reforming catalyst, contained within said multiple reaction zone system, to an oxidative burning off at a temperature and for a period of time sufficient to remove substantially all carbonaceous deposits thereon thereby providing a substantially carbon free catalyst;
- (c) subjecting said substantially carbon free catalyst to an oxygen treatment with a gas containing molecular oxygen at a temperature and for a time sufficient to effect the oxidation of the metals contained in said substantially carbon free catalyst thereby providing an oxidized catalyst;
- (d) purging said oxidized catalyst of molecular oxygen thereby providing a purged catalyst;
- (e) cooling said purged catalyst thereby providing a cooled catalyst;
- (f) reducing said cooled catalyst with hydrogen, said hydrogen being introduced into a reaction zone of said multiple reaction zone system;
- and
- (g) simultaneously with step (f) contacting said cooled catalyst with a chlorine-containing compound by introducing said chlorine-containing compound into said reaction zone of said multiple reaction zone system under conditions to effect decomposition of said chlorine-containing compound thereby providing said chlorine-treated catalyst having from about 1.05 to about 1.3 weight percent chlorine, based on the total weight of said chlorine-treated catalyst.
Dependencies are inferred from the claim text.