Oligomer production with catalytic distillation

Details Oligomer production with catalytic distillation Oligomer production with catalytic distillation

1998-04-10

2000-02-15

Griffin, Walter D.

Chemistry of hydrocarbon compounds

Plural serial diverse syntheses

To produce unsaturate

585329, 585324, 585315, C07C 208

Patent

active

060255331

ABSTRACT:
This process for the production of heavy oligomers by a combination of dehydrogenation and oligomerization uses a bed of saturation catalyst in a debutanizer to simplify the saturation and recycle of C.sub.4 hydrocarbons to the dehydrogenation zone. The catalytic distillation zone is located in the top of the debutanizer column and may offer further efficiency improvements to the process when used in series with a bed of alkylation or oligomerization catalyst in the distillation zone. The bed of alkylation or oligomerization catalyst reduces the quantity of C.sub.4 hydrocarbons recycled to the dehydrogenation zone by oligomerizing unconverted C.sub.4 olefins in the distillation column. Conversion of C.sub.4 olefins in the distillation column facilitates the operation of the oligomerization zone at lower conversion conditions that favor production of high octane products. The catalytic distillation arrangement is particularly beneficial in a combination for motor fuel from isoparaffins by dehydrogenation, oligomerization and saturation where the mass flow through the saturation zone is also reduced by alkylation and saturation in the distillation column.

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