SOLID FATTY ACID ALKYL ESTER SULFONATE METAL SALT MATERIAL, AND PROCESS FOR PRODUCTION OF FATTY ACID ALKYL ESTER SULFONATE METAL SALT POWDER HAVING SHARP GRAIN SIZE DISTRIBUTION

摘要

(1) A solid fatty acid alkyl ester sulfonate metal salt material characterized by having an endothermic peak area at 50 to 130°C of 50% or more relative to the whole endothermic peak area at 0 to 130°C as measured on a differential scanning calorimeter. (2) A process for producing a fatty acid alkyl ester sulfonate metal salt powder, which comprises pulverizing the solid fatty acid alkyl ester sulfonate metal salt material (1) in a pulverizer at a pulverizer inside temperature of 30 to 50°C.