PROCESS FOR PREPARING GRANULAR SYNTHETIC DETERGENT Russian patent published in 1994 - IPC

FIELD: chemical engineering. SUBSTANCE: process for preparing a granular detergent is carried out by separating powders into two streams. One of the streams is sprayed and first dried, posterior dried and granulated in the boiling bed liquefied by an ascending current of the heat carrier. 40-60% powdery components of the total weight of the product are introduced into the zone of the boiling bed. The drying is previously carried out in a descending current of the heat carrier. The ascending to descending current rate/ratio is 12-18 on the evaporating surface of the boiling bed. EFFECT: improved properties of the synthetic detergent. 1 dwg, 2 tbl