Method for separating pentenenitrile isomers

US6852199B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Tim Jungkamp · Sandhausen, DE
• Dagmar Pascale Kunsmann-Keitel · Ludwigshafen am Rhein, DE
• Robert Baumann · Mannheim, DE
• Peter Bassler · Viernheim, DE
• Wolfgang Siegel · Schifferstadt, DE

Key dates

• Filing date: Sep 25, 2001
• Grant date: Feb 8, 2005
• Expiry date: Feb 4, 2022

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C253/34
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process is provided for the distillative separation of pentene nitrile isomers which have a relative volatility alpha ranging from 1.0 to 1.3 in the pressure range from 1 to 500 kPa, wherein the distillation is carried out in the presence of a liquid diluent which forms with the pentene nitrile isomers, under the same pressure conditions, azeotropes whose relative volatility alpha is higher than that of the pentene nitrile isomers to be separated.