Patent ID: 7049260
Filing Date: 2006-05-23
Classification: B01J,C07C,Y02P

Abstract:
1. A method for preparing a catalyst composition for converting toluene to xylenes, comprising: (i) first silylating HZSM-5 with an alkoxysilane, to form silylated HZSM-5; (ii) first calcining the silylated HZSM-5, to form calcined silylated HZSM-5; (iii) binding the calcined silylated HZSM-5 to silica, to form silica-bound calcined silylated HZSM-5; (iv) extruding the silica-bound calcined silylated HZSM-5, to form extruded silica-bound calcined silylated HZSM-5; (v) second calcining the extruded silica-bound calcined silylated HZSM-5, to form extruded silica-bound twice-calcined silylated HZSM-5; (vi) second silylating the extruded silica-bound twice-calcined silylated HZSM-5, to form extruded silica-bound twice-calcined twice-silylated HZSM-5; and (vii) third calcining the extruded silica-bound twice-calcined twice-silylated HZSM-5, to form the silica-bound HZSM-5 catalyst.