Catalytic conversion over dehydroxylated zeolite

Details Catalytic conversion over dehydroxylated zeolite Catalytic conversion over dehydroxylated zeolite

1986-12-19

1988-02-09

Davis, Curtis R.

Chemistry of hydrocarbon compounds

Aromatic compound synthesis

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

585409, 585415, 585640, C07C 100

Patent

active

047242701

ABSTRACT:
The acidity of a zeolite catalyst is reduced by calcination in an essentially water-free atmosphere at temperatures above 700.degree. C., preferably from 725.degree. to 800.degree. C., to reduce the alpha value to less than 10 percent of its original value. The low acidity catalysts produced in this way may be used for conversions requiring low acidity, shape selective catalysis, including conversion of oxygenates to hydrocarbons. The calcined, low acidity catalysts exhibit improved selectivity to certain desired products.

REFERENCES:
patent: 3097115 (1963-07-01), Moos
patent: 4016218 (1977-05-01), Haag et al.
patent: 4060568 (1977-11-01), Rodewald
patent: 4141859 (1979-02-01), Plank et al.
patent: 4276438 (1981-06-01), Chu
Breck, D. W., Zeolite Molecular Sieves, pp. 493-495.

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