Influence of 2,2′,6,6′‐tetramethyl biphenol‐based anion‐exchange membranes on the diffusion dialysis of hydrochloride acid

Yu-bao, XI; Wu, Wenjun; Chen, Guodong; Yang, Canrui; Liao, Shijun; Li, Xiuhua

doi:10.1002/app.45333

Cited by 23 publications

(5 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In reality, AEM should prioritize high ion exchange capacity to improve ion transport sites [23]. IEC is a membrane permeability parameter that is dependent on the functional groups in the membrane matrix [49,50]. It is the amount of exchangeable ionic groups (equivalents) available per dry membrane weight.…”

Section: Ion Exchange Capacitymentioning

confidence: 99%

Synthesis of Porous BPPO-Based Anion Exchange Membranes for Acid Recovery via Diffusion Dialysis

et al. 2022

View full text Add to dashboard Cite

Diffusion dialysis (DD) is an anion exchange membrane-based functional separation process used for acid recovery. TMA (trimethylamine) and BPPO (brominated poly (2,6-dimethyl-1,4-phenylene oxide) were utilized in this manuscript to formulate AEMs (anion exchange membranes) for DD (diffusion dialysis) using the phase-inversion technique. FTIR (Fourier transfer infrared) analysis, proton NMR spectroscopy, morphology, IEC (ion exchange capacity), LER (linear expansion ratio), CR (fixed group concentration), WR (water uptake/adsorption), water contact angle, chemical, and thermal stability, were all used to evaluate the prepared membranes. The effect of TMA content within the membrane matrix on acid recovery was also briefly discussed. It was reported that porous AEMs have a WR of 149.6% to 233.8%, IEC (ion exchange capacity) of 0.71 to 1.43 mmol/g, CR (fixed group concentration) that ranged from 0.0046 mol/L to 0.0056 mol/L, LER of 3.88% to 9.23%, and a water contact angle of 33.10° to 78.58°. The UH (acid dialysis coefficients) for designed porous membranes were found to be 0.0043 to 0.012 m/h, with separation factors (S) ranging from 13.14 to 32.87 at the temperature of 25 °C. These observations are comparable to those found in the DF-120B commercial membrane with UH of 0.004 m/h and S of 24.3 m/h at the same temperature (25 °C). This porous membranes proposed in this paper are excellent choices for acid recovery through the diffusion dialysis process.

show abstract

Section: Ion Exchange Capacitymentioning

confidence: 99%

Synthesis of Porous BPPO-Based Anion Exchange Membranes for Acid Recovery via Diffusion Dialysis

et al. 2022

View full text Add to dashboard Cite

show abstract

“…This sludge is either landfilled or stored for further treatment, leading to the waste of metal value and secondary pollution issues [24]. Currently, membrane technologies such as membrane diffusion dialysis, membrane electrodialysis, solar water purification and membrane distillation are considered simple, effective, and sustainable treatment methods as they do not require the addition of chemicals to the SPS, and the treatment equipment occupies a small area, facilitating large-scale use [25][26][27]. However, in the field of industrial SPS cleaning solution treatments, the high ion concentration to be treated leads to high total treatment costs [28,29], and current membrane technologies are still mainly in the laboratory research stage and have not been applied to actual large-scale treatment.…”

Section: Introductionmentioning

confidence: 99%

Efficient Recycling and Utilization Strategy for Steel Spent Pickling Solution

Liu,

Cao,

Zhou

et al. 2024

Coatings

View full text Add to dashboard Cite

Before steel can be utilized, pickling is necessary to remove surface oxidation products. However, as the ferrous ion concentration in the pickling solution increases, the pickling rate significantly diminishes, necessitating the treatment of spent pickling solution (SPS) to mitigate its hazardous effects prior to disposal. Current industrial methods predominantly rely on neutralization and precipitation techniques, which are cost-prohibitive and generate substantial by-products, thus failing to meet environmental protection standards. In this study, a new method, which is based on the formation of FeC2O4·2H2O precipitate in a strong acid solution, is proposed to treat the SPS. Initially, the SPS undergoes a two-step impurity removal process, followed by the controlled addition of oxalic acid dihydrate (H2C2O4·2H2O) to precipitate iron. The resulting precipitate is filtered, washed, and vacuum-dried, and the regenerated acid is recycled back into the pickling tank. When 1 g/10 mL of H2C2O4·2H2O is used, the iron removal rate achieves 60%, and the acidity of the regenerated acid increases by 11.3%. X-ray diffraction pattern (XRD) and thermogravimetric–differential scanning calorimetry (TG-DSC) characterization showed that the precipitate was α-FeC2O4·2H2O, with an average particle size of about 3.19 μm and a purity of 95.24%. This process innovatively achieves efficient recycling of acid and iron resources, offering a potential solution to the industrial challenge of difficult SPS treatment in the steel industry and meeting the urgent need for sustainable development.

show abstract

“…The main problem associated with AEM is its hydrophily, which limits the ion transport rate in the DD process [26,27]. Currently, PECH is a common polymer material that has been little researched in terms of anion exchange membranes [28][29][30]. The reason is that the highly quaternized PECH membrane expands severely in water, which influences the application of PECH in DD [30].…”

Section: Introductionmentioning

confidence: 99%

Anion Exchange Membrane Based on BPPO/PECH with Net Structure for Acid Recovery via Diffusion Dialysis

Shen

Gong

Chen

et al. 2023

IJMS

View full text Add to dashboard Cite

In order to improve the performance of the anion exchange membrane (AEM) used in acid recovery from industrial wastewater, this study adopted a new strategy in which brominated poly (2,6-dimethyl-1,4-phenyleneoxide) (BPPO) and polyepichlorohydrin (PECH) were used as the polymer backbone of the prepared membrane. The new anion exchange membrane with a net structure was formed by quaternizing BPPO/PECH with N,N,N,N-tetramethyl-1,6-hexanediamine (TMHD). The application performance and physicochemical property of the membrane were adjusted by changing the content of PECH. The experimental study found that the prepared anion exchange membrane had good mechanical performance, thermostability, acid resistance and an appropriate water absorption and expansion ratio. The acid dialysis coefficient (UH+) of anion exchange membranes with different contents of PECH and BPPO was 0.0173–0.0262 m/h at 25 °C. The separation factors (S) of the anion exchange membranes were 24.6 to 27.0 at 25 °C. Compared with the commercial BPPO membrane (DF-120B), the prepared membrane had higher values of UH+ and S in this paper. In conclusion, this work indicated that the prepared BPPO/PECH anion exchange membrane had the potential for acid recovery using the DD method.

show abstract

Influence of 2,2′,6,6′‐tetramethyl biphenol‐based anion‐exchange membranes on the diffusion dialysis of hydrochloride acid

Cited by 23 publications

References 44 publications

Synthesis of Porous BPPO-Based Anion Exchange Membranes for Acid Recovery via Diffusion Dialysis

Synthesis of Porous BPPO-Based Anion Exchange Membranes for Acid Recovery via Diffusion Dialysis

Efficient Recycling and Utilization Strategy for Steel Spent Pickling Solution

Anion Exchange Membrane Based on BPPO/PECH with Net Structure for Acid Recovery via Diffusion Dialysis

Contact Info

Product

Resources

About