Separation of 1-butene from C4 feed streams

US7148392B2 · kind B2 · utility

Assignee

• EXXONMOBIL RESEARCH AND ENGINEERING COMPANY · US

Inventors

• Gary L. Casty · Easton, US
• Richard B. Hall · Whitehouse Station, US
• Sebastian C. Reyes · Readington, US
• Robert Patrick Reynolds, Jr. · Clinton, US
• Karl G. Strohmaier · Hackettstown, US

Key dates

• Filing date: Jun 17, 2003
• Grant date: Dec 12, 2006
• Expiry date: Nov 5, 2024

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C7/13
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

In a process for selectively separating 1-butene from a C4 feed stream comprising at least 1-butene, cis-2-butene and trans-2-butene, the feed stream is passed through a first bed of an adsorbent comprising a crystalline microporous material to form a substantially trans-2-butene-free effluent stream. Then, the substantially trans-2-butene-free effluent stream is passed through a second bed of an adsorbent comprising a crystalline microporous material to form a substantially 1-butene-free effluent stream, whereby the 1-butene is separated from the feed stream. The adsorbed 1-butene is then typically desorbed from the second adsorbent bed either by lowering the pressure or raising the temperature of the bed.