Obtaining the partially acidulated phosphate rocks by means of intermediate-grade phosphate and diluted phosphoric acid: Influence of some parameters

• Main Authors: Mizane Abbes, Boumerah Ahmed, Dadda Noureddine, Rehamnia Rabah, Belhait Salah
• Format: Article
• Language: English
• Published: Sciendo 2016-09-01
• Series: Polish Journal of Chemical Technology
• Subjects: paprs; phosphate rocks; phosphoric acid; water-soluble p2o5
• Online Access: https://doi.org/10.1515/pjct-2016-0046

In this work, some parameters during the partial acidulation by phosphoric acid of phosphate 53.75% BPL (bone phosphate of lime) having different particle sizes are determined. P2O5 recovery is obtained by performing a series of reactions using phosphoric acid diluted from 10 to 40 wt.% and with reaction times ranging from 10 to 50 minutes. The best conversion rates are obtained with the following reaction parameters: phosphates size: 88-177 μm, reaction time: 50 minutes and phosphoric acid concentration: 40 wt.%. In the second part, the water-soluble P2O5 of PAPRs (Partially Acidulated Phosphate Rocks) obtained with phosphoric acid 30% and 40 wt.% is measured. The results of experiments showed that the water-soluble P2O5 has reached 15.2% for PAPRs obtained by reacting phosphate 88 μm with phosphoric acid 40 wt%.