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for "Phosphate Rock Dissolution Using Nitric Acid"

Phosphate Rock Dissolution Using Nitric Acid
Author Walker, G. M. ; Ahmad, M. N. ; Chandler, R. D. ; Holland, C. R. ; Moursy, H. E. M. N. 
Society / Organization SME 
Summary / Abstract This work describes the effect of process parameters on the acidulation of Moroccan phosphate rock using nitric acid, i.e., the nitro-phosphate process. A series of bench scale experiments were conducted, using a stirred tank reactor (STR) system, to investigate the chemical reactions involved and optimum conditions for the formation of nitro-phosphate fertilizer. The effect of reaction time, temperature, mixing speed, acidulation ratio, and acid concentration were investigated, and were found to have an effect on the dissolution of P2O5 from the phosphate rock, using nitric acid. An increase in nitric acid concentration resulted in an increase in P2O5 dissolution, however, the dissolution was also found to be a function of acidulation ratio. A nitric acid phosphate rock ratio of 4:l ensured 90% dissolution for nitric acid concentration > 30%. 
Format PDF 
File Size 0.0k 
Specifications v 7.0 / 300 dpi 
Copyright Date 1/1/02 
Publication Date 1/1/02 
Digitization Date 12/14/07 
Book Title Beneficiation of Phosphates – Fundamentals and Technology 
Chapter Section 5 - Hydro-metallurgical Processing 
Pages 10 
ISBN 0-87335-225-4 

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