Production of ammonium phosphates
AssigneeEasymining Sweden AB
InventorYariv Cohen
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Abstract
A method for production of ammonium phosphates includes providing (210) of a phosphorus-loaded water immiscible liquid phase, adding (212) of anhydrous ammonia to the water immiscible liquid phase, precipitating (214) of mono-ammonium phosphate and/or di-ammonium phosphate from the water immiscible liquid phase and extracting (218) of the precipitated mono-ammonium phosphate and/or di-ammonium phosphate from the water immiscible liquid phase. The method further includes controlling (216) of a temperature of the water immiscible liquid phase during the adding (212) and precipitating (214) to a predetermined temperature interval.
Claims10
A method for production of ammonium phosphates, comprising the steps of:
- providing a phosphorus-loaded water immiscible liquid phase;
- adding anhydrous ammonia to said phosphorus-loaded water immiscible liquid phase;
- precipitating at least one of mono-ammonium phosphate and di-ammonium phosphate from said water immiscible liquid phase;
- controlling a temperature of the water immiscible liquid phase during said steps of adding and precipitating;
- extracting said precipitated at least one of mono-ammonium phosphate and di-ammonium phosphate from said water immiscible liquid phase;
- washing away residual water immiscible liquid phase from crystals of said extracted precipitated at least one of mono-ammonium phosphate and di-ammonium phosphate;
- said step of washing away residual water immiscible liquid phase comprises washing said crystals of said extracted precipitated at least one of mono-ammonium phosphate and di-ammonium phosphate with a washing liquid comprising saturated aqueous solution of ammonium phosphate;
- drying said washed crystals;
- separating said residual water immiscible liquid phase washed from said crystals from said washing liquid by phase separation of said residual water immiscible liquid phase in said step of washing away residual water immiscible liquid phase and said washing liquid;
- reusing said separated residual water immiscible liquid phase for further adsorbing of phosphorous in said step of providing a phosphorus-loaded water immiscible liquid phase;
- and
- reusing said washing liquid separated from residual water immiscible liquid phase in said step of washing away residual water immiscible liquid phase for further washing of crystals.
Dependencies are inferred from the claim text.