Development of thin anion-exchange pore-filled membranes for high diffusion dialysis performance

Porous diffusion dialysis membranes for rapid acid recovery

“…They are commonly prepared by the direct evaporation of the solution of polymer (homogeneous membrane) such as polysulfone, polystyrene, and poly(phenylene oxide) [12], or by the copolymerization of monomers within the pores of pre-formed porous membranes substrate (heterogeneous membrane) [13][14][15][16]. However, they are always compact in microstructure and thick (several tens or hundreds of microns), which can hinder ion transport in the membrane [12].…”

Branched Polyvinyl Alcohol Hybrid Membrane for Acid Recovery via Diffusion Dialysis

“…As explained in a previous literature review, the high flux of anion exchange membranes can be obtained by increasing the water uptake and introducing macro-pores [4]. However, high selectivity requires appropriate ion exchange capacity (IEC 1) ) and pore structures [16][17][18]. Meanwhile, for commercial pur-poses, high dimensional stability, i.e., low water uptake, and excellent acid stability are also desired.…”

Continuous dialysis of sulphuric acid and sodium sulphate mixture

“…Dialysis and diffusion dialysis, which belong to the group of membrane separation processes, can be investigated in a batch cell [1][2][3][4][5][6][7][8][9][10][11][12][13][14] or in continuous dialyzer [15][16][17][18][19][20][21][22][23]. In the former case, characteristics of the dialysis process are determined from liquid volumes and time dependences of the component concentrations in the individual compartments, while in the latter case the determination of the characteristics is based on the concentrations and volumetric liquid flow rates of all streams at steady state.…”

“…Kim et al. [11] prepared very thin (25 μm) pore-filled anion-exchange membranes using porous polyethylene substrates. In order to evaluate the separation efficiency of the membranes, the dialysis coefficients for H 2 SO 4 and FeCl 3 were determined from data obtained in a batch cell using the method proposed by Palatý and Bendová [12].…”