Abstract
A continuous analyser of thermometric type was modified and connected to a batch reactor to obtain quick kinetic curves of phosphate rock acid attack. Different kinds of rocks and two acids were tested in the physical conditions where the dissolution velocity is slow (diluted solutions and low temperatures). A mass transfer model, based on calcium diffusion from the rock particle to the liquid bulk, was verified, although at the beginning of the reaction a delay (as yet of unknown origin) appeared as described in the literature.
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Amirova AM and Nabjev MN (1968) Determination of the attack kinetics of the floated phosphate rock Karatau in nitric acid (in Russian). Chemical Journal of Science Academy of Uzbekistan n° 5: 5–8
Janikowski SM, Robinson N and Sheldrick WF (1964) Insoluble phosphate losses in phosphoric acid manufacture by the wet process: theory and experimental techniques. Proceedings N° 81 of The Fertilizer Society. London
Van der Sluis S, Meszaros Y, Marchee WGJ, Wesselingh HA and van Rosmalen GM (1987) The digestion of phosphate ore in phosphoric acid. Ind. Eng. Chem. Res. 26: 2501–2505
Flatt R, Brunisholz G and Dénéréaz A (1956) Contribution À l'étude du système quinaire Ca++-NH +4 -H+-NO -3 -PO ---4 -H2O. Helvetica Chimica Acta XXXIX: 473–483
Delmon B (1969) Introduction a la cinetique heterogene. Editions Technip, Paris
Mullin JW (1973) Crystallization. Butterworth, London
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Venturino, G., Cocquio, F., Mulato, R. et al. Measurement of acid attack on phosphate rocks. Fertilizer Research 26, 81–87 (1990). https://doi.org/10.1007/BF01048745
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DOI: https://doi.org/10.1007/BF01048745