Phosphoric Acid is an important intermediate,which could be applied for ammonium phosphate,triple super phosphate,compound fertilizer and other phosphate chemicals,and also in petroleum,

metallurgy,electronic,pharmaceutical and food.

The final application depends on the purity of phosphoric acid,and the purity is determined by the production methods.

Nowadays,there are mainly two ways--Hot way and wet way.

The hot way is produced by yellow phosphate,which be treated by oxidation,absorption.The wet way is produced by reaction of sulfuric acid or hydrochloric acid.Compared with hot way,the wet way phosphoric acid is with more impurities.Henceforth,the wet way is been used for phosphate fertilizer. If been used for other fine phosphate chemical,the wet way shall be further refinery.