Extraction of nickel (0) complexes from nitrile mixtures with reduced rag formation

US7935229B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

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

Key dates

• Filing date: Oct 12, 2005
• Grant date: May 3, 2011
• Expiry date: Aug 31, 2028

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P20/584
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A process for extractively removing homogeneously dissolved catalysts from a reaction effluent of a hydrocyanation of unsaturated mononitriles to dinitriles with a hydrocarbon H, including performing the steps of a) concentrating the reaction effluent before step b) by distillation at pressures of from 0.1 to 5000 mbar and temperatures of from 10 to 150° C., b) adding a hydrocarbon H to the concentrated reaction effluent to obtain a stream I, and c) feeding stream I, without prior separation of the liquid phases, into an extraction apparatus and extracting it at a temperature T with the hydrocarbon H to obtain a stream II comprising the hydrocarbon H enriched with the catalyst and a stream III having a low catalyst content.