One-Step Synthesis of Sodium Trimetaphosphate (Na3P3O9) from Sodium Chloride and Orthophosphoric Acid

Doan Pham Minh (1) , Jocelyn Ramaroson (1) , Ange Nzihou (1) , Patrick Sharrock (1)

1 RAPSODEE - Centre de recherche d'Albi en génie des procédés des solides divisés, de l'énergie et de l'environnement

One-step thermal synthesis of sodium trimetaphosphate (STM) from sodium chloride and 85 wt % orthophosphoric acid as starting materials was investigated. The reaction temperature and volume-mean diameter of sodium chloride influenced strongly the elimination of chloride and the selectivity in STM. STM of high quality (99%) was obtained at 600 degrees C from fine powder of sodium chloride. Hydrochloric acid was the only byproduct of the reaction.

Domaines: Sciences de l'ingénieur [physics]

Doan Pham Minh, Jocelyn Ramaroson, Ange Nzihou, Patrick Sharrock. One-Step Synthesis of Sodium Trimetaphosphate (Na3P3O9) from Sodium Chloride and Orthophosphoric Acid. Industrial and engineering chemistry research, 2012, 51 (10), p.3851-3854. ⟨10.1021/ie201085b⟩. ⟨hal-01632407⟩