Patent ID: 6228797
Filing Date: 2001-05-08
Classification: B01J,C10G

Abstract:
A method of preparing a catalyst system which comprises:dissolving at least a portion of at least one perfluoroalkylsulfonic acid salt of the formula C.sub.n F.sub.2n+1 SO.sub.3 X in a basic solution comprising a base to thereby form a first liquid material, wherein n ranges from 2 to 20 and X is an element selected from the group consisting of sodium and potassium;dissolving at least a portion of at least one hydrolyzable silane compound in a first acidic solution comprising a first acid to thereby form a second liquid material comprising at least one silanol comprising hydroxy groups and silicon;mixing said first liquid material and said second liquid material to thereby form a gel comprising silica and said at least one perfluoroalkylsulfonic acid salt;contacting said gel with a second acidic solution comprising a second acid to thereby form an acid-treated gel and to thereby convert at least a portion of said at least one perfluoroalkylsulfonic acid salt to at least one perfluoroalkylsulfonic acid of the formula C.sub.n F.sub.2n+1 SO.sub.3 H and to thereby convert at least a portion of said second acid to an acid salt;removing at least a portion of said acid salt from said acid-treated gel to thereby form a purified gel; anddrying said purified gel to thereby form said catalyst system.