Preparation of a solution of stearamidopropyl dimethyl pyrrolidonyl methyl ammonium chloride in a polyhydric alcohol

摘要

A solution of stearamidopropyl dimethyl pyrrolidonyl methyl ammonium chloride in a polyhydric alcohol, suitably at a concentration of about 1- 30% by weight, preferably 2-20%, and, optimally, about 5-15%, wherein said polyhydric alcohol is a di-, tri-, or tetra hydric alcohol, preferably glycerol, is prepared byPP(a) slurrying said compound into excess acetone,PP(b) filtering the slurry to provide a filter cake of said compound,PP(c) forming a solution of said filter cake in a polyhydric alcohol, andP P(d) dropping said solution into an evacuated reaction vessel at a suitable rate to minimize excessive foaming while residual acetone is removed therefrom, the solution remaining under substantial full vacuum until substantially all the solution has been added and substantially of the acetone has been removed.