Patent ID: 6015784
Filing Date: 2000-01-18
Classification: C11D

Abstract:
A process for preparing particles of secondary (2,3) ally sulfate surfactants with improved solubility, comprising the steps of:(a) admixing said secondary (2,3) alkyl sulfate in particulate form with a water-soluble particulate organic material selected from the group consisting of polyacrylates, acrylate/maleate copolymers, and mixtures thereof to provide a substantially homogeneous powder mixture containing at least about 10%, by weight, of said secondary (2,3) alkyl sulfate;(b) compacting said powder mixture from step (a) into chips;(c) comminuting the chips from step (b) into particles having a size in the range from about 100 to about 2000 micrometers and a density of at least about 500 g/L;(d) coating said particles from step (c) with a nonionic surfactant binder, and thereafter, coating said particles with a free-flow aid to provide free-flowing particles;(e) optionally, sizing the coated particles of step (d) to a mean particle size in the range from about 100 to about 1500 micrometers.