Process for the separation of alpha-olefins by distillation of a

Details Process for the separation of alpha-olefins by distillation of a Process for the separation of alpha-olefins by distillation of a

1996-07-23

1998-12-29

Yoon, Tae

Distillation: processes, separatory

Adding material to distilland except water or steam per se

Organic compound

203 75, 203 82, B01D 334, B01D 314

Patent

active

058535519

ABSTRACT:
The invention concerns a process for the separation of a mixture comprising ethylene, 1-butene, alpha-olefins containing at least 6 carbon atoms per molecule and possibly heavier hydrocarbon products, the ethylene content of the mixture being in the range 30% to 70% by weight, in which separation is effected in a distillation zone to obtain an overhead fraction comprising the major portion of the ethylene present in the mixture and between 0% and 100% by weight of the 1-butene present in the mixture, the process being characterized in that the zone is also supplied with supplemental 1-butene in an amount in the range 1 to 40 times the quantity (by weight) of 1-butene present in the mixture. In a preferred implementation of the process of the invention, the mixture originates form a homogenous liquid phase ethylene oligomerisation zone.

REFERENCES:
patent: 2775103 (1956-12-01), Koble et al.
patent: 4542251 (1985-09-01), Miller
patent: 4589957 (1986-05-01), Sherk et al.

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