Using {TAIL ~ the catalyst preparation procedures} set forth in U.S. Pat Nos. 3,957,689 and 4,458,023, catalysts of the present invention are obtained which are attrition resistant and particularly suited for {HEAD ~ use} in commercial FCC operations 
Using { TAIL ~ the catalyst preparation procedures } set forth in U.S. Pat Nos . 3,957,689 and 4,458,023 , catalysts of the present invention are obtained which are attrition resistant and particularly suited for { HEAD ~ use } in commercial FCC operations
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