Extraction of Fe3+ from NaH2PO4 solution in a spiral microchannel device

Mo, Guanglai; Liu, Hui; Dai, Shuang; Wang, Yubin; Li, Jun; Jian, Luo

doi:10.1016/j.cep.2019.107654

Cited by 10 publications

(2 citation statements)

References 46 publications

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“…Our research group previously used P507 to extract Cu 2+ and Fe 3+ in the spiral microchannel device and achieved good results. [4,40] In this work, RME and spiral microchannel devices were used in the P507-NaH 2 PO 4 system and the percentage extraction was compared. The spiral microchannel device is shown in Figure 1B.…”

Section: Effect Of Rotation Rate On Small Droplet Flowmentioning

confidence: 99%

Gas‐liquid‐liquid flow patterns and extraction in a rotating microchannel extractor

Fan

Wang

et al. 2021

Can J Chem Eng

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The flow patterns of gas-liquid-liquid three-phase fluids in the rotating microchannel extractor (RME) were studied in this paper. The kerosene-water system without mass transfer and the 2%P507-22%NaH 2 PO 4 system with mass transfer were considered. The influence of interfacial tension, microchannel structure, and rotation rate on three-phase flow patterns were investigated. Eight different flow patterns such as droplet-continuous flow, long dropletcontinuous flow, filiform parallel-continuous flow, filiform parallel-filiform parallel flow, small droplet-continuous flow, filiform parallel-small droplet flow, small droplet-small droplet flow, and continuous-filiform parallel flow were observed. The results showed that the proposed universal flow pattern map can effectively predict the flow patterns of the two systems and the small droplet-small droplet flow has the best effect of extracting Fe 3+ from the 2%P507-22%NaH 2 PO 4 system. The traditional first-order equilibrium extraction efficiency was 102% while the percentage extraction was up to 85% (14.4 mg/L) after one stage extraction and about 97.9% (2.0 mg/L) after twostage extraction. K E Y W O R D S ferric(III) ion, gas-liquid-liquid flow, mass transfer, rotating microchannel extractor

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Section: Effect Of Rotation Rate On Small Droplet Flowmentioning

confidence: 99%

Gas‐liquid‐liquid flow patterns and extraction in a rotating microchannel extractor

Fan

Wang

et al. 2021

Can J Chem Eng

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“…2-ethylhexyl phosphoric acid-2-ethylhexyl ester (P507) is used as a common extractant to remove metal cations. , Emulsification extraction with the P507 extractant is a very effective separation method . In this work, for the P507–water emulsion without a surfactant and the kerosene–water emulsion with an emulsifier, the demulsification effect in the RM was studied.…”

Section: Introductionmentioning

confidence: 99%

Demulsification of Oil-in-Water Emulsions in a Novel Rotating Microchannel

Fan

Wang

et al. 2020

Ind. Eng. Chem. Res.

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A novel rotating microchannel (RM) is made in our lab, which is used for the demulsification study in this paper. 2-ethylhexyl phosphoric acid-2-ethylhexyl ester (P507)–water emulsion without a surfactant and the kerosene–water emulsion with an emulsifier (sodium dodecyl sulfate) were considered. The influence of the emulsion type, inner cylinder speed, declination angle, volumetric flow rate of the emulsion, and cycle time on demulsification was investigated. The results showed that the emulsion and organic phase present good demulsification performance in parallel flow in the RM. The principle of destabilization is that the centrifugal force increases the random collision probability of droplets on the microchannel wall. By repeatedly passing through the RM three times, the total demulsification (organic phase recovery) efficiency of both the P507–water emulsion and kerosene–water emulsion exceeds 96%. A higher total demulsification efficiency is obtained by the RM at a low rotation speed (100 < R < 700 rpm), which is at least an order of magnitude less than that by conventional high-speed centrifugation (R: 4000 rpm).

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