Removal of iron from wet process phosphoric acid using ion exchange method by Puromet MTS9570 resin

Amin, Mostafa Ibrahim

doi:10.1080/03067319.2020.1769616

Cited by 4 publications

(1 citation statement)

References 12 publications

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“…In terms of ion exchange, Tang et al used ion-exchange resins to remove the aluminum cations from synthetic phosphoric acid solutions [ 10 ]. Amin et al also investigated the removal of iron from WPA by Puromet MTS9570 resin [ 11 ]. However, the disadvantage of ion exchange is that the solid-to-liquid ratio used is large, and the resin is loose and porous, which will cause excessive entrainment.…”

Section: Introductionmentioning

confidence: 99%

Purification of Wet-Process Phosphoric Acid via Donnan Dialysis with a Perfluorinated Sulfonic Acid Cation-Exchange Membrane

Zhong¹,

Luo²,

Yan³

et al. 2021

Membranes

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This work reports the application of an electromembrane process, Donnan dialysis (DD), for the purification of so-called wet-process phosphoric acid (WPA). Nitric acid is used as the stripping solution to remove metallic cations (mostly Fe3+, Al3+, and Mg2+) that are harmful to the further processing of WPA. The paper first presents a set of experimental data on the measurements of the metallic cation fluxes through a perfluorinated sulfonic acid cation-exchange membrane. Not only WPA, but also synthetic phosphoric acid solutions with mixed metallic cations (MPA) and with a single metallic cation (SPA) were studied. This confrontation confirms (1) that the order of metallic cations fluxes is Mg2+ > Al3+ > Fe3+; (2) that, compared with MPA, the purification effect of WPA causes only negligible change; (3) that, by comparing the DD processes with SPA and MPA solutions, the reason for the low transmembrane fluxes of Fe3+ and Al3+ could be explained by the large ionic charge and large hydrated ion radius. Furthermore, by analyzing the ion composition of membranes equilibrated in SPA solutions, we conclude that the forms of cations in the membrane are most likely Fe3+, Al3+, and Mg2+.

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Section: Introductionmentioning

confidence: 99%