On the interaction of apatite with low-concentration sulfuric acid solutions
Abstract
Studies on the kinetics of apatite dissolution in sulfuric acid have shown that the formation of films of insoluble compounds on the surface of the solid phase makes it difficult for solvent to access it and leads to a slowdown and even complete cessation of the dissolution process. In the concentration range of 16-25 n. H2SO4, the dissolution reaction slows down sharply. At concentrations above 25 n., apatite dissolves quickly. This is due to the different physical structure of the calcium sulfate film, which depends on the concentration of the solvent...
Область исследования:
(Archived) Without section
Funding:
None
References
- Brutskus E. B., Chepelevetsky M. L. Isochrons—isotherms of an apatite solution in the H2SO4—H3PO4—H2O system, as an example of topochemical kinetics, and superphosphate production. Proc. physical sector.- Chemical. Analysis of the USSR AS, No. 20, 1950.
- Krasnov K. S. Kinetics of apatite solutions in saturated CaO—P2O5—H2O systems. Jour. Appl. Chemistry, vol. 26, 1953.
- Pozin M. E., Kopylev B. A., Ten-Se-Den. Research in the field of mineral fertilizer technology. Lenin Institute of Technology, vol. 36, 1956.
- Akselrud G. A., Pokhodeyko L. A. Kinetics of a heterogeneous reaction between a solid and a liquid, accompanied by the formation of an insoluble solid phase. Chemistry, vol. 40, issue 2, 346, 1966.
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- Ma T. S., Mc. Kinley J. D. Mikrochemie, No. 1-2, 1953.
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