PRODUCTION OF ANIONIC SURFACTANT GRANULES BY IN SITU NEUTRALISATION

摘要

A PROCESS FOR THE PRODUCTION OF DETERGENT PARTICLES, COMPRISES FEEDING AN ACID PRECUSOR OF AN ANIONIC SURFACTANT AND A NEUTRALISING AGENT INTO A HORIZONTAL THIN-FILM EVAPORATOR/DRIER COMPRISING A MIXING REGION, A DRYING REGION AND A COOLING REGION. THE RESULTANT DETERGENT PARTICLES ARE GRADED TO SEPARATE AN OVERSIZE GRANULE FRACTION IN WHICH AT LEAST 70 WTOF THE PARTICLES HAVE A MINIMUM DIAMETER OF 1000UM. THIS FRACTION IS FED BACK INTO THE PROCESS.