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AssigneeShell Oil Company
InventorsBruce H. C. Winquist, Brendan D. Murray, Stanley N. Milam, Robert C. Ryan, Thomas W. Hastings
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The present invention relates to catalysts suitable for hydrogenating aromatics and olefins in hydrocarbon feedstocks boiling between about 125.degree. C. and about 625.degree. C. as well as the process for carrying out the hydrogenation. The catalysts consist of one or more Group VIII noble metal(s) on a support wherein the support is a Y-type zeolite prepared by contacting a starting Y-type zeolite having a unit cell size less than about 24.65, preferably less than about 24.4 angstroms, a silica to alumina molar ratio greater than about 5, preferably by greater than about 25 and an alkali metal content of less than about 0.30, preferably less than about 0.15 percent (basis metal) with one or more aqueous solution(s) comprising alkali(ne-earth) metal ions under conditions sufficient to provide a final alkali metal content (measured in terms of gram equivalent weight per gram of zeolite) of at least about 1.5 times greater than the alkali metal content (measured in terms of gram equivalent weight per gram of zeolite) of the starting zeolite. Preferred Group VIII metals are platinum and palladium and sodium is a preferred alkali(ne-earth) metal.
A process for the hydrogenation of hydrocarbon feedstocks containing hydrogenatable components and which have a boiling range between about 125.degree. C. and about 625.degree. C. which process comprises contacting said feedstock at a temperature ranging between about 150.degree. C. and about 400.degree. C. with hydrogen and a catalyst comprising one or more Group VIII noble metal(s) on a support wherein the support comprises a zeolite prepared by contacting a starting Y zeolite having a unit cell size of less than about 24.65 angstroms, a silica to alumina molar ratio greater than about 5, and an alkali metal content of less than about 0.3 percent (basis metal) with one or more aqueous solution(s) comprising alkali(ne-earth) metal ions under conditions sufficient to provide a final alkali(ne-earth) metal content (measured in terms of gram equivalent weight per gram of zeolite) of at least about 1.5 times greater than the alkali metal content (measured in terms of gram equivalent weight per gram of zeolite) of the starting zeolite.
A process for the hydrogenation of hydrocarbon feedstocks containing hydrogenatable components and which have a boiling range between about 125.degree. C. and about 625.degree. C. which process comprises contacting said feedstock at a temperature ranging between about 150.degree. C. and about 400.degree. C. with hydrogen and a catalyst comprising platinum and palladium in an amount ranging from about 0.05 to about 3 percent by weight of the total catalyst and in a platinum to palladium molar ratio ranging from about 0.1 to about 1.0 supported on a support wherein the support comprises a zeolite prepared by contacting a starting Y zeolite having a unit cell size of less than about 24.4 angstroms, a silica to alumina molar ratio greater than about 25, and an alkali metal content of less than about 0.15 percent (basis metal) with one or more aqueous solution(s) comprising alkali(ne-earth) metal ions under conditions sufficient to provide a final alkali(ne-earth) metal content (measured in terms of gram equivalent weight per gram of zeolite) of at about 5 times greater than tile alkali metal content (measured in terms of gram equivalent weight per gram of zeolite) of the starting zeolite.
A process for the hydrofining of a diesel range fuel feedstock containing aromatics and olefins to produce a product having a boiling range between about 125.degree. C. and about 425.degree. C. whereby said olefins and aromatics are substantially converted to saturates and the saturated aromatics are converted at least in part to acyclics with hydrocracking of the feedstock being substantially absent thereby improving the environmental quality and cetane number of the feedstock which process comprises contacting said feedstock at a temperature ranging between about 225.degree. C. and about 375.degree. C. with hydrogen and a catalyst comprising platinum and palladium in an amount ranging from about 0.05 to about 3 percent by weight of the total catalyst and in a platinum to palladium molar ratio ranging from about 0.1 to about 0.5 supported on a support wherein the support comprises a zeolite prepared by contacting a starting Y zeolite having a unit cell size of less than about 24.65 angstroms, a silica to alumina molar ratio greater than about 5, and an alkali metal content of less than about 0.3 percent (basis metal) with one or more aqueous solution(s) comprising alkali(ne-earth) metal ions under conditions sufficient to provide a final alkali(ne-earth) metal content (measured in terms of gram equivalent weight per gram of zeolite) of at least about 1.5 times greater than the alkali metal content (measured in terms of gram equivalent weight per gram of Y zeolite) of the starting zeolite.
A process for the combined hydrotreating and hydrogenation of hydrocarbon feedstocks containing nitrogen- and sulfur-containing impurities, aromatics and olefins and which feedstocks have a boiling range between about 125.degree. C. and about 625.degree. C. which process comprises:
A process for the hydrogenation of hydrocarbon feedstocks containing hydrogenatable components and which have a boiling range between about 125.degree. C. and about 625.degree. C. which process comprises contacting said feedstock at a temperature ranging between about 150.degree. C. and about 400.degree. C. with hydrogen and a catalyst comprising one or more Group VIII noble metal(s) in an amount ranging from about 0.05 to about 3 percent by weight of the total catalyst on a support wherein the support comprises a zeolite prepared by contacting a starting Y zeolite having a unit cell size of less than about 24.65 angstroms, a silica to alumina molar ratio greater than about 5, and an alkali metal content of less than about 0.3 percent (basis metal) with one or more aqueous solution(s) comprising alkali(ne-earth) metal ions under conditions sufficient to provide a final alkali(ne-earth) metal content (measured in terms of gram equivalent weight per gram of zeolite) of at least about 1.5 times greater than the alkali metal content (measured in terms of gram equivalent weight per grain of zeolite) of the starting zeolite.
Dependencies are inferred from the claim text.