Patent ID: 6355596
Filing Date: 2002-03-12
Classification: B01J

Abstract:
A method for preparing a catalyst having a uniform distribution of titanium, said method comprising the steps of:preparing formed silica hydrogel particles containing water and having a hydroxyl concentration; drying said formed silica hydrogel particles to remove substantially all of said water; selecting a titanium precursor having a relatively low reactivity and selected from the group consisting of titanocene, titanium acetylacetonate, isopropyl titanate-acetylacetone complex, and triethanolamine titanate; contacting said formed silica gel particles having a diameter of about 2 mm to about 4 mm with said titanium precursor in an amount to achieve a molar titanium:hydroxyl ratio of at least about 0.05:1, wherein said ratio and said low reactivity contribute to form titanium-impregnated formed silica gel particles having a uniform distribution of titanium; and recovering said titanium-impregnated formed silica gel particles as said catalyst.