Olefin purification process

US5120901A · kind A · utility

Assignee

• Ethyl Corporation · US

Inventors

• Thomas J. DiLeo · Baton Rouge, US
• Cynthia W. Hermann · Pearland, US
• Carroll W. Lanier · Baker, US
• Joachim W. Wolfram · Baton Rouge, US

Key dates

• Filing date: Jun 27, 1991
• Grant date: Jun 9, 1992
• Expiry date: Jun 27, 2011

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C7/177
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process for removing vinylidene olefin from an olefin mixture containing about 1 to 55 mole percent vinylidene olefin, 0 to 20 mole percent internal olefin and the balance vinyl olefin, said process comprising: PA0 (a) reacting said olefin mixture in the presence of a BF.sub.3 /phosphorus acid catalyst system so as to selectively dimerize vinylidene olefins, and PA0 (b) separating said vinyl olefin and internal olefin from the dimerized vinylidene olefin to produce an olefin product having a reduced vinylidene olefin content and an increased vinyl olefin content compared to said starting olefin mixture.