BF3 removal from olefin oligomerisation product stream and recycling of the recovered BF3

摘要

This invention concerns a process for recovering BF3 from a BF3/promoter complex catalyzed alpha -olefin oligomerization product stream, which process comprises thermally cracking the complex in the product stream to yield BF3 gas, and contacting the BF3 gas with a cold alpha -olefin stream containing a promoter.