초록 ▼

Spray dried detergent compositions which incorporate a sodium aluminosilicate detergency builder, are prepared by forming an aqueous detergent slurry containing the sodium aluminosilicate and then admixing an aqueous solution or suspension of sodium silicate with the detergent slurry at a point betw

Spray dried detergent compositions which incorporate a sodium aluminosilicate detergency builder, are prepared by forming an aqueous detergent slurry containing the sodium aluminosilicate and then admixing an aqueous solution or suspension of sodium silicate with the detergent slurry at a point between the slurry mixing vessel and the spray nozzle. This avoids harmful interaction between the sodium aluminosilicate and the sodium silicate, which otherwise decreases washing performance, while retaining good powder properties.

대표청구항 ▼

In a process for preparing a powdered detergent composition having an effective amount of a sodium alumino-silicate detergency builder, said process comprising the steps of forming a detergent slurry containing the sodium alumino-silicate detergency builder in a slurry mixing vessel and spray drying

In a process for preparing a powdered detergent composition having an effective amount of a sodium alumino-silicate detergency builder, said process comprising the steps of forming a detergent slurry containing the sodium alumino-silicate detergency builder in a slurry mixing vessel and spray drying the slurry through a spray nozzle, the improvement wherein an aqueous solution or suspension of sodium silicate in an amount sufficient to provide from 0.1 to 50% by weight in the detergent composition is admixed with the detergent slurry at a point between the slurry mixing vessel and the spray nozzle and the contact time between the detergent slurry and the solution or suspension of sodium silicate is less than 5 minutes.