Process for the selective preparation of DIB from an i-butene-containing C4 stream

US6632972B2 · kind B2 · utility

Assignee

• BP KOLN GmbH · DE

Inventors

• Alexander Gammersbach · Neuss, DE
• Axel Gohrt · Cologne, DE
• Joachim Grub · Dormagen, DE
• Stefan Kaminsky · Neustadt an der Weinstraße, DE
• Hans-Joachim Kramer · Dormagen, DE

Key dates

• Filing date: Aug 16, 2001
• Grant date: Oct 14, 2003
• Expiry date: Aug 16, 2021

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C2531/08
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The invention relates to a process for preparing diisobutylene (DIB) from an i-butene-containing C4 raffinate I, in which the C4 stream is passed through a first hydroisomerization reactor (A) and a fractionation column (B) and is thus largely freed of 1-butene and 2-butene. It is subsequently dimerized over an acidic catalyst installed in a reactive column (E). The feed stream to this reactive column contains not only i-butene but also butanes which make the reaction temperature in the fixed bed controllable by removal of the heat of reaction. In the fractionation column (B), a side stream can be subjected to a further hydroisomerization in a reactor (C).