2008•Journal of Wuhan Institute of TechnologyRequires access
Production of industrial diammonium phosphate with mid-low-grade phosphate rock
Zhiquan Pan
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Abstract
The industrial-grade diammonium phosphate was prepared by decomposition of mid-low-grade phosphate rock with phosphoric acid,followed by added sulfuric acid to produce crude phosphoric acid,actualizing effective separation of impurties from complex-deposition of phosphoric acid through adding organic base,and aminating the complex-deposition.The techniques offer an effective method to utilize mid-low-grade phosphate rock and produce industrial-grade phosphate.