Process for isolating cyclopentane and/or cyclopentene

US6264799A · kind A · utility

Assignee

• EC Erdolchemie 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: Mar 5, 1999
• Grant date: Jul 24, 2001
• Expiry date: Mar 5, 2019

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 C.sub.5 fraction which has in each case being partially hydrogenated to remove acetylene compounds and diolefins, wherein PA1 a) in a first fractional distillation, low boilers are removed as first top product and, either PA1 b1) 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, or PA1 b2) 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, or PA1 b3) 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.