Patent ID: 11872544
Assignee: PHILLIPS 66 COMPANY
Field: Chemical engineering (Chemistry)
Classification: CPC B  C | IPC B  C

Claim 0:
1. A modified HZSM-5 catalyst produced by:
a) contacting an NaZSM-5 zeolite that is free of binder material and template with an alkaline solution characterized by a pH of at least 11 for at least 1 hr to produce a modified NaZSM 5 zeolite;
b) diluting the alkaline solution with water, then performing ion-exchange on the modified NaZSM-5 zeolite by contacting the modified NaZSM-5 zeolite with an acidic solution characterized by a pH in the range from 1.0 to 6.5 to convert the modified NaZSM-5 zeolite to a modified HZSM-5 catalyst intermediate;
c) drying the modified HZSM-5 catalyst intermediate to produce a dried HZSM-5 catalyst intermediate;
d) calcining the dried HZSM-5 catalyst intermediate to produce a modified HZSM-5 catalyst, wherein the modified HZSM-5 catalyst comprises an increased mesopore volume relative to an untreated HZSM-5 catalyst, wherein mesopores within the catalyst are defined as pores in the range from 2 to 50 nm in diameter.