The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 29, 2008
Filed:
Jan. 18, 2006
An-hsiang Wu, Kingwood, TX (US);
Charles A. Drake, Nowata, OK (US);
An-hsiang Wu, Kingwood, TX (US);
Charles A. Drake, Nowata, OK (US);
Chevron Phillips Chemical Company LP, The Woodlands, TX (US);
Abstract
We disclose a method for preparing a catalyst for converting toluene to xylenes. As an example, in one embodiment the method can include: (i) binding HZSM-5 to silica, to form silica-bound HZSM-5; (ii) silylating the silica-bound HZSM-5, to form silylated silica-bound HZSM-5; (iii) calcining the silylated silica-bound HZSM-5, to form calcined silylated silica-bound HZSM-5; (iv) first washing the calcined silylated silica-bound HZSM-5, to form washed calcined silylated silica-bound HZSM-5; (v) first drying the washed calcined silylated silica-bound HZSM-5, to form dried calcined silylated silica-bound HZSM-5; (vi) steaming the dried calcined silylated silica-bound HZSM-5, to form steamed calcined silylated silica-bound HZSM-5; (vii) treating the steamed calcined silylated silica-bound HZSM-5 with acid, to form acid-treated calcined silylated silica-bound HZSM-5; (viii) second washing the acid-treated calcined silylated silica-bound HZSM-5, to form washed acid-treated calcined silylated silica-bound HZSM-5; and (ix) second drying the washed acid-treated calcined silylated silica-bound HZSM-5, to form the silica-bound HZSM-5 catalyst.