Abstract
Hydrochloric and nitric acid treated apatite is not directly used as a fertilizer because of the hygroscopic character of the products. Another problem arises from the volatility of these acids and that acidulated product undergo reversions during drying with loss of the acid. We have found that apatite beneficiated with hydrochloric and nitric acids dried at an optimum temperature ~120°C has high available phosphorous. The products can be stored in the solid form in sealed polythene bags.
Similar content being viewed by others
References
Collings GH (1955) Commercial Fertilizers pp 151–190, McGraw Hill, London
Harre EA, German WH and White WC (1981). The World Fertilizer Market. In: (eds) Olsen RA, Hanway JJ and Kilmer VJ Fertilizer Technology and Use pp 27–54. Soil Science Society of America Inc
Sauchelli V (1960) Chemistry and Technology of Fertilizers. New York: Reinhold Publishing Co
Hignett Tp. Doll EC, Livingston OW and Raistrick R (1977) Utilization of difficult phosphate ores. In: Carpentier LJ (ed) New developments in Phosphate Fertilizer Technology, Amsterdam, Elsevier
Phillips AB and Webb TR (1971) Production, Marketing and Use of Phosphorus Fertilizers. In eds: Olson RA, Army TJ, Hanway JJ, Fertilizer Technology and Use pp. 275–276, Soil Society of America Inc
Chari KS (1989) Techno — economic Evaluation of Phosphate Rock for Wet-process Phosphoric Acid, Fertilizer News 2: 21–25
Becker P (1983) Phosphates and Phosphoric Acid, Marcel Dekker Inc, New York
Tennakone K (1988) Non hygroscopic superphosphate fertilizer from apatite and hydrochloric acid, Fertilizer Research 16: 87–96
Author information
Authors and Affiliations
Additional information
Sumanasekara Chair in Natural Science
Rights and permissions
About this article
Cite this article
Tennakone, K., Ketipearachchi, U.S. & Weragama, U. Optimising P2O5 availability for fertilizer use, by direct treatment of apatite with hydrochloric or nitric acids. Fertilizer Research 24, 63–66 (1990). https://doi.org/10.1007/BF01073148
Issue Date:
DOI: https://doi.org/10.1007/BF01073148