Patent ID: 7186677

Claim:
A method for producing surfactant granulates, comprising: providing a mixture of anionic surfactant acids and builder acids having a weight ratio of 1:100 to 1:20 of builder acid to surfactant acid; foaming the builder acid and the anionic surfactant acid; and neutralizing the mixture with at a solid bed comprising least one solid neutralizing agent; wherein said builder acid is citric acid, tartaric acid, succinic acid, malonic acid, adipic acid, maleic acid, fumaric acid, oxalic acid, gluconic acid, nitrilotriacetic acid, aspartic acid, ethylenediaminetetraacetic acid, aminotrimethylenephosphonic acid, hydroxyethanediphosphonic acid, polyaspartic acids, polyacrylic acids, polymethacrylic acids, or copolymers thereof; wherein the builder acid has a particle size below 200 μm.