Method for producing strong base phosphates
OwnerMohamed Takhiminventor
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Abstract
The inventive method for producing strong base phosphates consists in forming a pulp consisting of an aqueous phase which contains a water-soluble calcium phosphate and a solid impurity-containing phase, in separating said phases, transferring calcium ions to a liquid phase by a strong base ions associated with forming the aqueous solution of the pure phosphate(s) of said strong base and in precipitating a pure water-insoluble calcium phosphate. Said method also consists in mixing phosphoric ores and acid in such a way that a pasty triple superphosphate composition is obtained and in adding water thereto in order to produce said pulp.
Claims18
Method for preparing strong base phosphates, comprising:
- forming a pulp consisting of an aqueous phase, which contains water-soluble calcium phosphate in the form of calcium ions and phosphate ions, and a solid phase which contains impurities,
- separating said liquid phase and said solid phase,
- in the liquid phase resulting from said separation, displacing the calcium ions by ions of a strong base which results in formation of an aqueous solution of phosphate(s) of said strong base and precipitation of a water-insoluble calcium phosphate, and
- isolating the precipitated calcium phosphate from the aqueous solution of strong base phosphate(s),
- wherein the step of forming said pulp comprises
- mixing phosphate ore and phosphoric acid for etching, in order to obtain a pasty triple superphosphate (TSP) composition, and
- adding water to the TSP composition obtained.
Dependencies are inferred from the claim text.