Xylene isomerization using a zeolite with a group II metal

Details Xylene isomerization using a zeolite with a group II metal Xylene isomerization using a zeolite with a group II metal

1985-07-09

1986-04-22

Doll, John

Chemistry of hydrocarbon compounds

Aromatic compound synthesis

By isomerization

502 71, 502 77, C07C 522

Patent

active

045844232

ABSTRACT:
A process for isomerizing xylenes containing ethylbenzene to obtain near equilibrium amounts of paraxylene and to convert the ethylbenzene to hydrocarbons readily removable from the xylenes. The isomerization reaction uses a ZSM-5 type catalyst with 0.05 to 1.5 percent of an added metal such as zinc, cadmium, or barium. The isomerization is carried out in the absence of added hydrogen at low pressure, preferably between about 0 and 200 psig. Relatively low xylene losses are achieved even at high ethylbenzene conversion levels.

REFERENCES:
patent: Re30157 (1979-11-01), Burress
patent: 4159283 (1979-06-01), Nicoletti et al.
patent: 4224141 (1980-09-01), Morrison et al.
patent: 4227728 (1981-01-01), Rubin et al.
patent: 4351979 (1982-09-01), Chester et al.

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