Process for producting high purity butene-1 with a low energy co

Details Process for producting high purity butene-1 with a low energy co Process for producting high purity butene-1 with a low energy co

1986-09-04

1988-01-12

Bashore, S. Leon

Distillation: processes, separatory

And recovering heat by indirect heat exchange

Utilizing recovered heat for heating the distillation zone

203 32, 203 38, 203 80, 203DIG8, 585809, B01D 128

Patent

active

047189860

ABSTRACT:
High purity butene-1, in particular polymerization grade butene-1, is obtained by means of a two-stage fractionation of a C.sub.4 hydrocarbon stream comprising butene-1 which is substantially free from butadiene.
The first stage of the fractionation process allows practically all the isobutane contained in the C.sub.4 batch to be separated as the top stream.
The bottom phase of the first stage of fractionation is supplied to the second stage of fractionation thus obtaining high purity butene-1 as the top fraction, and the remaining components as the bottom phase
According to the process of the invention, vapors of butene-1 obtained as the top stream from the second stage of fractionation are compressed and the resultant heat of condensation is used for operating the reboilers of the two fractionation stages.

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