Patent ID: 6884917

Claim:
A method for recovering high purity 1-butene using simple distillation comprising providing a feed material consisting essentially of 1-pentene, 2-pentenes, and hexenes, subjecting said feed to metathesis operating conditions with ethylene to convert at least part of said 2-pentenes to a mixture of propylene and 1-butene and produce a first mixture consisting essentially of unconverted ethylene, propylene, 1-butene, 2-butenes, 1-pentene, 2-pentenes and hexenes and containing essentially no isobutylene or butadienes, separating ethylene and propylene from said first mixture thereby leaving a second mixture consisting essentially of 1-butene, 2-butenes, 1- and 2-pentenes, and hexenes, subjecting said second mixture to simple distillation whereby high purity 1-butene is recovered overhead as a product of the process, and leaving a bottom fraction consisting essentially of 2-butenes, 1- and 2-pentenes, and hexenes.