Patent ID: 6992055
Filing Date: 2006-01-31
Classification: C11D

Abstract:
1. A method for producing detergent granules, comprising the step of dry-neutralizing a liquid acid precursor of a non-soap, anionic surfactant prepared by a SO 3 gas sulfonation method, with a water-soluble, solid, alkali inorganic substance, wherein a dry-neutralizing step is carried out in the presence of 0.1 to 1.0 mole of a sulfuric acid per mole of said liquid acid precursor of a non-soap, anionic surfactant; wherein the amount of sulfuric acid preexisting in the liquid acid precursor of a non-soap, anionic surfactant is 0.05 mole or less per mole of said liquid acid precursor; wherein the sulfuric acid and the liquid acid precursor of a non-soap, anionic surfactant are added separately to the starting material components; and wherein the resulting detergent granules contain the non-soap, anionic surfactant in an amount of 28% by weight or more and less than 50% by weight, and have a molar ratio of (inorganic salt undetectable by x-ray diffraction method)/(non-soap, anionic surfactant) of from 0.1 to 1.0, and the inorganic salt undetectable by x-ray diffraction method is sodium sulfate.