Przemysl Chemiczny, Vol.91, No.5, 978-984, 2012
Transformation of phosphorus compounds contained in Morocco II phosphate rock under PAPR technique conditions by using a mixture of sulfuric and phosphoric acid
Phosphate rock was decompd. with mixts. of H2SO4 and H3PO4 and studied for contens of citric acid, HCOOH, mineral acids, neutral NH4 citrate and water-sol. P The optimum fertilizer was produced at H2SO4/H3PO4 ratio 20:80 and contained mineral acid-sol. P2O5 at least 38% by mass, and H2O-sol. P2O5 less than 1.5% by mass.