Process for the purification of phosphonium salts

US6630605B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Christoph Wegner · Schifferstadt, DE
• Daniela Klein · Mannheim, DE

Key dates

• Filing date: Jun 5, 2002
• Grant date: Oct 7, 2003
• Expiry date: Jun 5, 2022

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07F9/5435
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The invention relates to a process for the purification of phosphonium salts in which a solution of the crude phosphonium salt is passed over a bed of a cation exchange resin in salt form or of an adsorber resin, the resin is washed with a polar protic solvent in the case of the cation exchange resin and with an electrolyte solution and a nonpolar solvent in the case of the adsorber resin, and the phosphonium salt is eluted from the cation exchange resin with an electrolyte solution or from the adsorber resin with a polar solvent.