An investigation of solubility of aliquat 336 in different extracted solutions

Xu, Jian–Ying; Paimin, Rohani; Shen, Wei; Wang, Xungai

doi:10.1007/bf02899326

Cited by 26 publications

(15 citation statements)

References 4 publications

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“…After 60 min, the amount of impregnated Aliquat 336 becomes stable. It is worth to note that during the stability test, the amount of Aliquat 336 removed into the water phase is about 0.00125 g/100 mL, which is much smaller than the solubility of Aliquat 336 in aqueous phase (about 0.1 g/100 mL) [ 49 ]. This result indicates that the pore structure of PolyHIPE can effectively improve the stability of Aliquat 336 inside the membrane.…”

Section: Resultsmentioning

confidence: 99%

Application of PolyHIPE Membrane with Tricaprylmethylammonium Chloride for Cr(VI) Ion Separation: Parameters and Mechanism of Transport Relating to the Pore Structure

Chen

Hsu

2018

Membranes

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The structural characteristics of membrane support directly affect the performance of carrier facilitated transport membrane. A highly porous PolyHIPE impregnated with Aliquat 336 is proposed for Cr(VI) separation. PolyHIPE consisting of poly(styrene-co-2-ethylhexyl acrylate) copolymer crosslinked with divinylbenzene has the pore structure characteristic of large pore spaces interconnected with small window throats. The unique pore structure provides the membrane with high flux and stability. The experimental results indicate that the effective diffusion coefficient D* of Cr(VI) through Aliquat 336/PolyHIPE membrane is as high as 1.75 × 10−11 m2 s−1. Transport study shows that the diffusion of Cr(VI) through Aliquat 336/PolyHIPE membrane can be attributed to the jumping transport mechanism. The hydraulic stability experiment shows that the membrane is quite stable, with recovery rates remaining at 95%, even after 10 consecutive cycles of operation. The separation study demonstrates the potential application of this new type of membrane for Cr(VI) recovery.

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Section: Resultsmentioning

confidence: 99%

Application of PolyHIPE Membrane with Tricaprylmethylammonium Chloride for Cr(VI) Ion Separation: Parameters and Mechanism of Transport Relating to the Pore Structure

Chen

Hsu

2018

Membranes

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“…The Aliquat chloride forms an interface on the membrane surface [46]. Reverse micelles of Aliquat 336 are formed inside the membrane (which also occurs at high concentrations of Aliquat 336).…”

Section: Resultsmentioning

confidence: 99%

“…The Aliquat ion-pairs need to stabilize ( Figure 3 ) within the physical membrane structure when a perturbation is applied. Aliquat 336 is a surface active compound and will orient itself so that ammonium head groups face the water at the membrane-solution interface, while the long alkyl chains will face away from the interface and into the membrane [ 46 ].…”

Section: Resultsmentioning

confidence: 99%

Electrochemical Impedance Spectroscopy—A Simple Method for the Characterization of Polymer Inclusion Membranes Containing Aliquat 336

2011

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Electrochemical impedance spectroscopy (EIS) has been used to estimate the non-frequency dependent (static) dielectric constants of base polymers such as poly(vinyl chloride) (PVC), cellulose triacetate (CTA) and polystyrene (PS). Polymer inclusion membranes (PIMs) containing different amounts of PVC or CTA, along with the room temperature ionic liquid Aliquat 336 and plasticizers such as trisbutoxyethyl phosphate (TBEP), dioctyl sebecate (DOS) and 2-nitrophenyloctyl ether (NPOE) have been investigated. In this study, the complex and abstract method of EIS has been applied in a simple and easy to use way, so as to make the method accessible to membrane scientists and engineers who may not possess the detailed knowledge of electrochemistry and interfacial science needed for a rigorous interpretation of EIS results. The EIS data reported herein are internally consistent with a percolation threshold in the dielectric constant at high concentrations of Aliquat 336, which illustrates the suitability of the EIS technique since membrane percolation with ion exchangers is a well-known phenomenon.

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“…They reported that the membrane lost approximately a quarter to a third of its Aliquat 336 content in distilled water, but only 2-3% in 2.5 M HCl solution [5]. Xu et al [1] also investigated the loss of Aliquat 336 from membrane to an aqueous solution and found that the concentration of the extractant being leached into the solution from the membrane was lower than the solubility of Aliquat 336 in water. Wang [4] noticed that Aliquat 336/PVC-based polymer liquid membranes showed some macroscopic morphological deterioration after the extraction of Cd(II), but the same type of membrane demonstrated high morphological stability in the extraction of Cu(II).…”

Section: Introductionmentioning

confidence: 97%

“…The extraction of heavy metal ions from aqueous solutions using PVC-based polymer liquid membrane containing Aliquat 336 as a carrier species has been reported by several authors [1][2][3][4][5][6][7][8][9]. This type of membrane film has been shown to be quite effective in removing trace amount of heavy metal ions from aqueous solutions [3,4].…”

Section: Introductionmentioning

confidence: 98%

Chemical and morphological stability of Aliquat 336/PVC membranes in membrane extraction: A preliminary study

Wang

Shen

2005

Separation and Purification Technology

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An investigation of solubility of aliquat 336 in different extracted solutions

Cited by 26 publications

References 4 publications

Application of PolyHIPE Membrane with Tricaprylmethylammonium Chloride for Cr(VI) Ion Separation: Parameters and Mechanism of Transport Relating to the Pore Structure

Application of PolyHIPE Membrane with Tricaprylmethylammonium Chloride for Cr(VI) Ion Separation: Parameters and Mechanism of Transport Relating to the Pore Structure

Electrochemical Impedance Spectroscopy—A Simple Method for the Characterization of Polymer Inclusion Membranes Containing Aliquat 336

Chemical and morphological stability of Aliquat 336/PVC membranes in membrane extraction: A preliminary study

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