Patent ID: 6777381
Filing Date: 2004-08-17
Classification: C11D

Abstract:
A process for preparing a solvent-based surfactant paste comprising the steps of:A) forming an aqueous surfactant mixture by blending, by weight of the mixture: (a) from about 5% to about 85% of an anionic sulfonated surfactant; (b) from about 15% to about 95% of an organic solvent; (c) from about 0.001% to about 40% of a chelant; wherein the aqueous surfactant mixture a water content of about 5% to 80% by weight of the aqueous surfactant mixture and the aqueous surfactant mixture is a non-Newtonian fluid;B) drying the aqueous surfactant mixture under vacuum to form the solvent-based surfactant paste having a wafer content of less than about 1% and which is in the form of a Newtonian fluid having a substantially constant viscosity within the range of 100 cp to 100000 cp when measured at a temperature of 25Â° C. and within the shear rate range of from 1 sâˆ’1 to 1000 sâˆ’1.