BF.sub.3 gas recovery process

Details BF.sub.3 gas recovery process BF.sub.3 gas recovery process

1995-06-13

1998-09-22

Wood, Elizabeth D.

Chemistry of hydrocarbon compounds

Unsaturated compound synthesis

By addition of entire unsaturated molecules, e.g.,...

585520, 585521, 585525, 423293, C07C 208, C07C 226

Patent

active

058116168

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.

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