Process for isolating cyclopentane and/or cyclopentene

US6468399B2 · kind B2 · utility

Assignee

• BP KOLN GmbH · DE

Inventors

• Arnd Stuwe · Leverkusen, DE
• Rolf Dieter Wurtz · Herrenberg, DE
• Michael Muller · Munich, DE
• Jens Herwig · Cologne, DE
• Christian Gabel · Dormagen, DE
• Joachim Grub · Dormagen, DE

Key dates

• Filing date: Feb 16, 2001
• Grant date: Oct 22, 2002
• Expiry date: Feb 16, 2021

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S203/20
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Cyclopentane and/or cyclopentene and, if desired, isopentane can be obtained by distillative separation from a pre-benzene fraction or a C5 fraction which has in each case being partially hydrogenated to remove acetylene compounds and diolefins, whereina) in a first fractional distillation, low boilers are removed as first top product and, eitherb1) the first bottom product is fed to a second fractional distillation and there cyclopentene is taken off as second top product and cyclopentane and higher-boiling hydrocarbons are taken off as second bottom product and this second bottom product is separated into cyclopentene and higher boilers in a third fractional distillation, orb2) the first bottom product is subjected to a catalytic hydrogenation and subsequently, in a fractional distillation, separated into cyclopentane as top product and higher boilers as bottom product, orb3) the first bottom product is subjected to a fractional distillation to separate off the relatively high boilers as bottom product and the top product is subjected to a catalytic hydrogenation to form cyclopentene.