Method of preparing granular N-alkyl-ammoniumacetonitrile salts

US6593473B1 · kind B1 · utility

Assignee

• BASF SE

Inventors

• Michael Schönherr · Bischofswerda, DE
• Hans-Jürgen Kinder · Speyer, DE
• Klaus Mundinger · Schifferstadt, DE
• Gregor Schurmann · Hannover, DE

Key dates

• Filing date: Sep 25, 2001
• Grant date: Jul 15, 2003
• Expiry date: Sep 25, 2021

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D295/15
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Improved process for the preparation of granular N-alkylammoniumacetonitrile salts IR2R3N+R1—CR4R5—CN Y−  (I)where R1 to R5 are hydrogen or organic radicals, and Y− is a sulfate or hydrogensulfate anion,from an aqueous solution of the compound IIR2R3N+R1—CR4R5—CN R6O—SO2—O−  (II)where R6 is C1- to C4-alkyl,which comprises evaporating this aqueous solution at a temperature of from 80° C. to 250° C. and a pressure of from 10 mbar to 2 bar to give a melt, then allowing the melt to solidify, where, during or following the evaporation, customary carrier materials and/or auxiliaries can be added, and the resulting solidified compound I is converted into the desired granular form.