Olefin separation process

Details Olefin separation process Olefin separation process

1975-07-28

1977-07-19

Levine, Herbert

Mineral oils: processes and products

Fractionation

Adsorption

260677AD, C10G 2504, B01J 2908

Patent

active

040367444

ABSTRACT:
An improved process for the separation of olefins from a hydrocarbon feed mixture comprising olefins and saturates which process uses an adsorbent comprising sodium type X or sodium type Y zeolite to selectively adsorb the olefins. The improvement comprises employing an adsorbent produced by the steps of: contacting a precursor mass comprising type X or type Y zeolite having a Na.sub.2 O/Al.sub.2 O.sub.3 ratio less than about 0.7 with an aqueous sodium hydroxide solution at ion exchange conditions to effect the addition of sodium cations to the mass and the removal of a small amount of silica and alumina, washing the mass with water to remove excess sodium hydroxide solution; and, at least partially dehydrating the mass at dehydrating conditions thereby producing an adsorbent which has both increased capacity for olefins and decreased catalytic activity.

REFERENCES:
patent: 3331882 (1967-07-01), Mattox
patent: 3374182 (1968-03-01), Young
patent: 3549558 (1970-12-01), Berry et al.
patent: 3717572 (1973-02-01), Gramont et al.

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