Hydrotreating catalyst composition and processes therefor and th

Details Hydrotreating catalyst composition and processes therefor and th Hydrotreating catalyst composition and processes therefor and th

1997-06-04

1999-05-18

Straub, Gary P.

Catalyst, solid sorbent, or support therefor: product or process

Zeolite or clay, including gallium analogs

502 60, 502 61, 502 63, 502 64, 502 67, 502 68, 502 71, 502 74, 502 76, 502 77, 502 80, 502101, B01J29/04;29/06;21/00;21/16

Patent

active

059050519

ABSTRACT:
A catalyst system and a process for converting a hydrocarbon stream such as, for example, a C.sub.9 +aromatic compound to C.sub.6 to C.sub.8 aromatic hydrocarbons such as xylenes are disclosed. The catalyst system comprises a first catalyst composition and a second catalyst composition wherein said catalyst system is not a physical mixture of said first catalyst composition and said second catalyst composition, said first catalyst is a metal-promoted, alumina- or silica-bound beta zeolite, and said second catalyst composition is a ZSM-5 zeolite having incorporated therein an activity promoter selected from the group consisting of silicon, phosphorus, sulfur, and combinations of two or more thereof. The process comprises contacting a hydrocarbon stream with the catalyst system under a condition sufficient to effect the conversion of a the hydrocarbon to a C.sub.6 to C.sub.8 aromatic hydrocarbon.

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