Method for producing linear pentenenitrile

US8410299B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Tim Jungkamp · Sandhausen, DE
• Robert Baumann · Mannheim, DE
• Michael Bartsch · Neustadt, DE
• Gerd Haderlein · Bad Kötzting, DE
• Hermann Luyken · Ludwigshafen, DE
• Jens Scheidel · Hirschberg, DE
• Tobias Aechtner · Mannheim, DE
• Peter Pfab · Schwarzheide, DE
• Petra Deckert · Bammental, DE
• Wolfgang Siegel · Schifferstadt, DE
• Peter Baβler · Viernheim, DE

Key dates

• Filing date: Jan 30, 2012
• Grant date: Apr 2, 2013
• Expiry date: Jan 30, 2032

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P20/582
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A method for producing 3-pentenenitrile is provided that includes: (a) isomerizing an educt stream containing 2-methyl-3-butenenitrile on at least one dissolved or dispersed isomerization catalyst to form a stream (1), which contains the isomerization catalyst(s), 2-methyl-3-butenenitrile, 3-pentenenitrile and (Z)-2-methyl-2-butenenitrile; (b) distilling the stream (1) to obtain a stream (2) as the overhead product, which contains 2-methyl-3-butenenitrile, 3-pentenenitrile and (Z)-2-methyl-2-butenenitrile and a stream (3) as the bottom product, which contains the isomerization catalyst(s); (c) distilling the stream (2) to obtain a stream (4) as the overhead product, which is enriched with (Z)-2-methyl-2-butenenitrile in comparison to stream (2), and a stream (5) as the bottom product, which is enriched with 3-pentenenitrile and 2-methyl-3-butenenitrile in comparison to stream (2); (d) distilling stream (5) to obtain a stream (6) as the bottom product, which contains 3-pentenenitrile and a stream (7) as the head product containing 2-methyl-3-butenenitrile.