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- W2361400452 abstract "In order to research the effect and the mechanism of water-soluble P2O5 on the conversion of the deposited gypsum, a by-product from wet phosphoric acid process, to ammonium sulfate, the conversion of pure gypsum to ammonium sulfate by using ammonium carbonate aqueous solution in the presence of water-soluble P2O5 was experimentally studied. The results show that when the content of P2O5 is increased, the conversion degree is lowered, the filtration becomes difficult and the product contains more liquid. The results obtained from XRD and SEM indicate that water-soluble P2O5 in gypsum reduces the rate of transformation from vaterite to calcite and makes crystalline grains smaller and irregular. The results of ICP-AES and EPMA show that water-soluble P2O5 is likely to be adsorbed on the surface of the products to affect the transformation and habits of calcium carbonate crystalline. According to those results, the content of water-soluble P2O5 in the gypsum as the by-product from phosphoric acid manufacture should be less than 1.0%." @default.
- W2361400452 created "2016-06-24" @default.
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- W2361400452 date "2004-01-01" @default.
- W2361400452 modified "2023-09-23" @default.
- W2361400452 title "Study on the Effect of Water-soluble P_2O_5 on the Conversion Process of Gypsum to Ammonium Sulfate" @default.
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