Xylene isomerization

Details Xylene isomerization Xylene isomerization

1979-06-01

1980-08-19

O'Keefe, Veronica

Chemistry of hydrocarbon compounds

Aromatic compound synthesis

By isomerization

585486, 585489, 252455Z, C07C 1500, C07C 1502

Patent

active

042185734

ABSTRACT:
Isomerization of xylenes in admixture with ethyl benzene by contact with a zeolite catalyst such as ZSM-5 is improved by use of zeolite having a substantial alkali metal content at a temperature above about 800.degree. F. At these conditions, conversion of ethylbenzene follows a different reaction path which permits high conversion of ethylbenzene to benzene without loss of xylenes by disproportionation.

REFERENCES:
patent: 3856871 (1974-12-01), Haag et al.
patent: 3856872 (1974-12-01), Morrison
patent: 3856873 (1974-12-01), Burress
patent: 4101598 (1978-07-01), Whittam et al.
patent: 4152363 (1979-05-01), Tabak et al.
patent: 4163028 (1979-07-01), Tabak et al.

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