Patent ID: 7326760

Claim:
A method of producing a supported chromium catalyst comprising: combining a chromium compound, with a silica-containing support comprising silica selected from the group consisting of silica having: (a) a pore volume of about 1.1-1.8 cm 3 /g and a surface area of about 245-375 m 2 /g; (b) a pore volume of about 2.4-3.7 cm 3 /g and a surface area of about 410-620 m 2 /g; and (c) a pore volume of about 0.9-1.4 cm 3 /g and a surface area of about 390-590 m 2 /g; and, then activating said supported chromium compound at 400-860° C., then adding an alkyl silanol; wherein the method further comprises adding titanium tetraisopropoxide to the chromium compound and silica-containing support.