Process for preparing sodium tripolyphosphate

Details Process for preparing sodium tripolyphosphate Process for preparing sodium tripolyphosphate

C - Chemistry, Metallurgy

01

B

23/64

C01B 25/41 (2006.01)

Patent

CA 2030974

There is disclosed a process from producing granular sodium tripolyphosphate of predetermined particle size by means of calcining sodium orthophosphate dried from water solution and milled to a predetermined particle size. The tripolyphosphate is produced having approximately the same particle size distribution as the orthophosphate feed. Moisturizing the feed prior to calcining increases the assay of the product.

Divulgation d'un procédé pour produire du tripolyphosphate de sodium granulaire, de taille déterminée d'avance, consistant à faire calciner de l'orthophosphate séché, provenant d'une solution aqueuse, lequel est broyé à une taille particulaire déterminée d'avance. Le tripolyphosphate est produit avec à peu près la même distribution granulométrique que l'alimentation d'orthophosphate. L'humidification de l'alimentation avant la calcination permet d'améliorer la granulométrie du produit.

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