Production of heavier hydrocarbons from light olefins in multist

Details Production of heavier hydrocarbons from light olefins in multist Production of heavier hydrocarbons from light olefins in multist

1987-12-28

1988-11-29

Pal, Asok

Chemistry of hydrocarbon compounds

Plural serial diverse syntheses

With hydrocarbon effluent stream splitting for recycle to...

585301, 585303, 585312, 585315, 585415, C07C 200

Patent

active

047883669

ABSTRACT:
A multi-stage catalytic olefin upgrading technique for converting lower olefinic feedstock to heavier liquid hydrocarbon product. The invention provides a fluid bed continuous primary stage reaction zone with shape selective medium pore zeolite oligomerization catalyst particles to convert at least a portion of the lower olefinic components to intermediate olefinic hydrocarbons containing olefinic and aromatic components; cooling primary stage reaction effluent to condense at least a portion of the intermediate hydrocarbons; feeding a second olefinic stream to a serially arranged multi-reactor secondary stage for upgrading lower olefins; quenching partially upgraded secondary stage olefins with primary stage liquid; and further contacting the quenched mixture including aromatics from the primary stage with shape selective medium pore zeolite olgiomerization catalyst in a high pressure fix bed secondary stage distillate mode catalytic reactor at elevated temperature and high prssure to provide a heavier hydrocarbon effluent stream comprising distillate hydrocarbons.

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