Catalytic conversion over dehydroxylated zeolite

Details Catalytic conversion over dehydroxylated zeolite Catalytic conversion over dehydroxylated zeolite

1988-02-08

1988-12-13

Davis, Curtis R.

Mineral oils: processes and products

Chemical conversion of hydrocarbons

Cracking

208120, 208124, 585739, C10G 4702, C10G 1102, C07C 513

Patent

active

047909285

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 about 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 dewaxing. The calcined, low acidity catalysts exhibit improved dewaxing activity.

REFERENCES:
patent: 3097115 (1963-07-01), Moos
patent: 3939058 (1976-02-01), Plank
patent: 4016218 (1977-05-01), Haag et al.
patent: 4060568 (1977-11-01), Rodewald
patent: 4141859 (1979-02-01), Plank
patent: 4276438 (1981-06-01), Chu
patent: 4430200 (1984-02-01), Shibabi
patent: 4661467 (1987-04-01), Kuehl
Breck, D. W., Zeolite Molecular Sieves, pp. 493-495.

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