US 5,811,616 A · BF.sub.3 gas recovery process

Abstract

BF.sub.3 is vaporized from specified crude polyolefin reaction product mixture in a vaporization zone at a temperature insufficient to decompose BF.sub.3 or any BF.sub.3 promoter complex in the mixture, and the vaporized BF.sub.3 may be recovered directly. Further, a process for the oligomerization of a liquid olefin composition and recovery of BF.sub.3 is described in which inert volatile material present in a liquid olefin composition is removed from the composition by vaporization, forming a degassed liquid olefin composition free of inert volatile material. The degassed liquid olefin composition is then contacted in a reaction zone with BF.sub.3 under conditions to oligomerize the olefin, forming crude polyolefin oligomerization reaction product mixture containing dissolved BF.sub.3, which may be treated as described.

Claims10

Dependent claims

A process for the oligomerization of a liquid olefin composition and the recovery of BF.sub.3, comprising:

removing inert volatile material present in a liquid olefin composition from the composition by vaporization, forming a degassed liquid olefin composition feed that is free of inert volatile material;
contacting the resulting degassed liquid olefin composition feed in a reaction zone with BF.sub.3 under conditions to oligomerize olefin in said degassed liquid olefin composition feed, thereby forming crude polyolefin oligomerization reaction product mixture containing dissolved BF.sub.3 ;
vaporizing BF.sub.3 from said crude polyolefin reaction product mixture in a vaporization zone at a temperature insufficient to decompose BF.sub.3 or any BF.sub.3 promoter complex in said mixture;
and
recovering BF.sub.3 vaporized in said vaporization zone, free of the aforesaid inert volatile material.

2 more elements

Dependencies are inferred from the claim text.

BF.sub.3 gas recovery process

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BF.sub.3 gas recovery process

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Abstract

Claims10