Catalytic reforming catalyst activation
AssigneePhillips Petroleum Company
InventorsDonald H. Macahan, Fan-Nan Lin
Life of this patent
Estimating the term…
Abstract
Catalyst activation of a platinum reforming catalyst system contained in a multiple reactor system by simultaneously reducing the catalyst with a sustained hydrogen flow through the multiple reactor system while introducing a nonmetallic chlorine-containing compound serially into each reactor of the multiple reactor system in an amount to provide from about 0.05 to about 0.3 weight percent chlorine on the catalyst and thereafter purging the system with about 100 to about 50,000 cubic feet of hydrogen per cubic foot of catalyst prior to commencing use of the treated catalyst system for reforming hydrocarbon feed.
Claims20
A process for activating a platinum-containing reforming catalyst contained in a multiple reaction zone system, said process comprises:
- (a) reducing said platinum-containing reforming catalyst with hydrogen;
- (b) simultaneously with step (a) contacting said platinum-containing reforming catalyst with a nonmetallic chlorine-containing compound by introducing said nonmetallic chlorine-containing compound serially into each reaction zone of said multiple reaction zone system under conditions to effect decomposition of said nonmetallic chlorine-containing compound thereby providing a chlorine-treated catalyst;
- and (c) thereafter purging said chlorine-treated catalyst with about 100 to about 50,000 cubic feet of hydrogen per cubic foot of said chlorine-treated catalyst prior to using said chlorine-treated catalyst in a reforming process.
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 nitrogen;
- (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;
- (g) simultaneously with step (f) contacting said cooled catalyst with a nonmetallic chlorine-containing compound in a quantity sufficient to provide from about 0.05 to about 0.3 weight percent chlorine on said cooled catalyst by introducing said nonmetallic chlorine-containing compound serially into each reaction zone of said multiple reaction zone system under conditions to effect decomposition of said nonmetallic chlorine-containing compound thereby providing a chlorine-treated catalyst;
- (h) thereafter purging said chlorine-treated catalyst with about 100 to about 50,000 cubic feet of hydrogen per cubic foot of said chlorine-treated catalyst at a temperature in the range of about 700° F. to about 1,200° F. and a pressure in the range of about 0 to about 600 psig prior to introducing hydrocarbon into said multiple reaction zone system.
Dependencies are inferred from the claim text.