Preparation of aqueous solutions or fine aqueous dispersions of polyenyltriarylphosphonium salts

US4182731A · kind A · utility

Assignee

• BASF SE

Inventors

• Bernhard Schulz · Schwetzingen, DE
• Paul Grafen · Bad Dürkheim, DE
• Hans-Ulrich Scholz · Bad Dürkheim, DE
• Hans Grassner · Heidelberg, DE
• Werner Reif

Key dates

• Filing date: Jun 5, 1978
• Grant date: Jan 8, 1980
• Expiry date: Jun 5, 1998

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07F9/5442
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Aqueous solutions of polyenyltriarylphosphonium salts are prepared from solutions of the corresponding polyenyltriarylphosphonium salts in organic solvents by driving off the solvent with steam, part of the steam being allowed to condense. Some of the said triarylphosphonium salts may be used directly as pesticides while others are used as intermediates for organic syntheses, especially in the carotinoid field.