Hydrocarbon isomerization catalyst and use thereof
AssigneePhillips Petroleum Company
InventorsAn-Hsiang Wu, Marvin M. Johnson, Donald H. Kubicek, Fan-Nan Lin
Life of this patent
Estimating the term…
Abstract
A catalyst composition is prepared by a method comprising impregnating alumina with at least one dissolved titanium compound (preferably a triethanolamine titanate) and at least one platinum compound, followed by treatment (at specific temperature conditions) with at least one organoaluminum chloride (preferably ethylaluminum dichloride), hydrogen chloride and at least one chloroalkane (preferably carbon tetrachloride). The thus-prepared catalyst composition is employed in the isomerization of saturated C.sub.4 -C.sub.8 hydrocarbons (alkanes and/or cycloalkanes), preferably n-butane.
Claims31
A method of preparing a solid composition consisting essentially of the sequence of steps of:
- (a) impregnating alumina with at least one dissolved titanium compound and at least one platinum compound;
- (b) calcining the impregnated alumina obtained in step (a) at a temperature of about 300.degree.-650.degree. C. for a time period of at least 10 minutes;
- (c) contacting the material obtained in step (b) with at least one organoaluminum chloride which is dissolved in an essentially water-free solvent;
- (d) calcining the treated material obtained in step (c) at a temperature of about 600.degree.-700.degree. C. for a time period of at least about 10 minutes;
- (e1) treating the material obtained in step (d) with a HCl-containing gas at a temperature of about 500.degree.-600.degree. C. for a time period of at least about 10 minutes;
- and
- (e2) treating the material obtained in step (e1) with a gas containing at least one chloroalkane at a temperature of about 250.degree.-350 .degree. C. for a time period of at least about 10 minutes;
- wherein said solid composition prepared by said method comprises about 0.4-0.6 weight-% Ti.
Dependencies are inferred from the claim text.