process for the production of aqueous solutions. feinteiligen aqueous dispersions of polyenyltriarylphosphoniumsalzen

摘要

10-70 wt.% organic solvent solutions of polyenyl-triaryl-phosphonium salts of formula (I) (R is a 5-20C aliphatic, cycloaliphatic-aliphatic or araliphatic polyenyl residue; X is the anion equivalent of a strong acid; Ar is aryl) are converted into solvent-free aq. solutions or fine dispersions. the solvent and other steam-volatile cpds. originating from the synthesis of (I) are driven off with steam at 30-120degrees C. Part of the steam is allowed to condense so as to produce the aq. soln. or dispersion. Some cpds. (I) are useful as pesticides (e.g. against water snails), while others are intermediates, esp. for carotenoids. Aq. solns. or dispersions of (I) often preferred for organic syntheses) are easily obtd. from the organic solutions formed in the synthesis of (I).