Phosphorus-containing additive such as sodium tripolyphosphate has been widely used in the detergent industry for its excellent properties as detergent assistant. The research on replacing phosphorus-containing assistant has been paid great attention during the last three decades due to its over-nutrition in related water body. The layered sodium silicate, a new phosphate-free detergent assistant, can be produced with soluble glass as raw material by being spray-dehydrated and calcined. The temperature of s...