Catalyst and process for the conversion of heavy aromatics to li

Details Catalyst and process for the conversion of heavy aromatics to li Catalyst and process for the conversion of heavy aromatics to li

1996-02-06

1998-04-28

Griffin, Walter D.

Chemistry of hydrocarbon compounds

Aromatic compound synthesis

By dealkylation

502 64, 502 65, 502 66, 502 71, 502 70, 502 77, 502 81, 502 84, 502325, 502339, 502332, 502349, 502351, 585488, 585486, C07C 412

Patent

active

057446741

ABSTRACT:
A catalyst for the preparation of benzene, toluene and xylene from C.sub.9.sup.+ heavy aromatics consists of zeolite ZSM-5 and .gamma.- or .eta.-Al.sub.2 O.sub.3 as carrier, Re, Sn and Pt or Pd supported on the carrier. Under the conditions of 350.degree.-450.degree. C., 0.5-3.5 MPa, a WHSV of 1-5 h.sup.-1 and a H.sub.2 /HC ratio (v/v) of 500-1200, the catalyst achieves high activity and stability as well as low hydrogen consumption.

REFERENCES:
patent: 4341622 (1982-07-01), Tabak et al.
patent: 4738941 (1988-04-01), Dufresne et al.
patent: 4933487 (1990-06-01), Hoelderich et al.
patent: 5001296 (1991-03-01), Howley et al.
patent: 5043513 (1991-08-01), Howley et al.
patent: 5271920 (1993-12-01), Chang et al.

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