Production of Phosphoric Acid Using Acids Other Than Sulfuric

9 Production of Phosphoric Acid Using Acids Other Than Sulfuric 

Phosphate rock can be dissolved by several organic and inorganic acids to produce phosphoric acid. The use of nitric acid for this purpose is described in Chapter 13. Commercial nitrophosphate processes produce phosphoric arid that contedns nitrates hence, these pro- 

Several processes using hydrochloric acid have been developed or patented, but only that developed by the Israel Mining Industry (IMI) has been used commercially [41]. The IMI process has been described in a UNIDO publication [42]. A brief description of the main stages of the process follows. 

Dissolution of phosphate rock by hydrochloric arid, which results in an aqueous solution of calcium chloride and phosphoric acid  

Liquid-liquid contacting in a number of solvent extraction steps to obtain a solution of substantially pure phosphoric arid and 

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