Active zeolite catalysts of improved stability for producing gas

Details Active zeolite catalysts of improved stability for producing gas Active zeolite catalysts of improved stability for producing gas

1986-06-09

1987-05-05

Davis, Curtis R.

Chemistry of hydrocarbon compounds

Aromatic compound synthesis

By ring formation from nonring moiety, e.g., aromatization,...

585640, 585733, C07C 1120

Patent

active

046634924

ABSTRACT:
A feedstock of low molecular weight oxygenates such as methanol and/or dimethylether is contacted with a mildly presteamed or hydro-thermally treated zeolite catalyst in a reaction zone to produce liquid hydrocarbons in the gasoline boiling range. The pretreated zeolite catalyst has an .alpha.-value (acid cracking activity) substantially the same as the .alpha.-value of fresh unsteamed catalyst and shows increased stability and resistance to aging under oxygenate conversion conditions of elevated temperature and pressure.

REFERENCES:
patent: 3965209 (1976-06-01), Butter et al.
patent: 3969426 (1976-07-01), Owen et al.
patent: 4236996 (1980-12-01), Tabak et al.
patent: 4326994 (1982-04-01), Haag et al.
patent: 4429176 (1984-01-01), Chester et al.
patent: 4522929 (1985-06-01), Chester et al.

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