Preparation and use of isomerization catalysts
AssigneePhillips Petroleum Company
InventorAn-hsiang Wu
Life of this patent
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Abstract
Novel compositions, being effective as catalysts for alkane and/or cycloalkane isomerization, are prepared by a method which includes the steps of impregnating alumina with a sulfate of at least one metal selected from the group consisting of copper, iron, cobalt, nickel, manganese, zinc and magnesium, calcining the thus-obtained impregnated alumina materials, and heating the calcined materials with AlCl.sub.3 and at least one chlorinated hydrocarbon (preferably CCl.sub.4) at a temperature of about 40.degree.-90.degree. C. Preferably, this method also includes a step of treating the calcined impregnated alumina materials with gaseous hydrogen chloride before the heating with AlCl.sub.3 and the chlorinated hydrocarbon(s) is carried out.
Claims20
A method of preparing a composition of matter consisting essentially of the steps of:
- (1) impregnating alumina having a surface area of at least about 40 m.sup.2 /g with a solution of at least one metal salt selected from the group consisting of copper(II) sulfate, iron(II) sulfate, cobalt(II) sulfate, nickel(II) sulfate, manganese(II) sulfate, zinc sulfate and magnesium sulfate;
- (2) calcining the material obtained in step (1) for a period of at least 0.5 hour at a temperature of about 400.degree.-750.degree. C.;
- (3) heating for a period of at least one hour, at a temperature in the range of about 40.degree. C. to about 90.degree. C. and in substantial absence of water, a mixture consisting essentially of the calcined material obtained in step (2), aluminum chloride and at least one chlorinated hydrocarbon selected from the group consisting of dichloromethane, chloroform, carbon tetrachloride, 1,1-dichloroethane, 1,2-dichloroethane, 1,1,1-trichloroethane, 1,1-dichloropropane, 2,2-dichloropropane, 1-chlorobutane and 2-chloro-2-methylbutane, wherein the weight ratio of AlCl.sub.3 to said calcined material obtained in step (2) is at least about 0.35:1;
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- (4) separating the solid material contained in the reaction mixture formed in step (3) from said at least one chlorinated hydrocarbon under a dry gas atmosphere.
A method of preparing a composition of matter consisting essentially of the steps of:
- (1) impregnating alumina having a surface area of at least about 40 m.sup.2 /g with a solution of at least one metal salt selected from the group consisting of copper(II) sulfate, iron(II) sulfate, cobalt(II) sulfate, nickel(II) sulfate, manganese(II) sulfate, zinc sulfate and magnesium sulfate;
- (2) calcining the material obtained in step (1) for a period of at least one hour at a temperature of about 400.degree.-750.degree. C.;
- (2a) contacting the calcined material obtained in step (2) with dry gaseous hydrogen chloride at a temperature of about 600.degree.-750.degree. C. for at least about 10 minutes;
- (3) heating for a period of at least one hour, at a temperature in the range of about 40.degree. C. to about 90.degree. C. and in substantial absence of water, a mixture consisting essentially of the calcined material obtained in step (2a), aluminum chloride and at least one chlorinated hydrocarbon selected from the group consisting of dichloromethane, chloroform, carbon tetrachloride, 1,1-dichloroethane, 1,2-dichloroethane, 1,1,1-trichloroethane, 1,1-dichloropropane, 2,2-dichloropropane, 1-chlorobutane and 2-chloro-2-methylbutane, wherein the weight ratio of AlCl.sub.3 to said calcined material obtained in step (2a) is at least about 0.35:1;
- and
- (4) separating the solid material contained in the reaction mixture formed in step (3) from said at least one chlorinated hydrocarbon under a dry gas atmosphere.
Dependencies are inferred from the claim text.