Patent ID: 7485615

Claim:
A process for producing a granular anionic surfactant, said method comprising: granulating an anionic surfactant paste and a powder raw material for a time sufficient to both form said granular anionic surfactant while simultaneously drying said granular anionic surfactant, while adding an anionic surfactant paste to a powder raw material under reduced pressure, in a granulator, wherein the granulator is provided with a stirring blade and a cracking blade, and wherein the pressure in the granulator is 0.67 to 40 kPa, said granular anionic surfactant product comprising 80 to 99.5% by weight of anionic surfactant, wherein the granules during the drying and granulating step have a temperature ranging from 35 to 75° C. with a variation of ±5° C., and wherein the granular anionic surfactant product has a water content of 0.3 to 2.5% by weight.