Investigation of alumina preparation from aluminum chloride aqueous solution by electrical transformation

Han, Xiuxiu; Zhang, Ting‐an; Lv, Guozhi; Pan, Xijuan; Fu, Daxue

doi:10.1016/j.hydromet.2019.01.014

Cited by 10 publications

(4 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the previous research of our group, Han et al. [ 11 ] proposed a new electroconversion treatment technology, in the process of extracting Al 2 O 3 from high‐alumina fly ash by hydrochloric acid method, converting AlCl 3 into AlMnC x O y, and finally calcined at 850 °C for 2 h to obtain Al 2 O 3 . Meng et al.…”

Section: Introductionmentioning

confidence: 99%

“…When the oxidation reaction was accelerated sharply, the flake limonite phase would be formed, and when the oxidation reaction was slow, the Fe 3 O 4 phase would be formed. In the previous research of our group, Han et al [11] proposed a new electroconversion treatment technology, in the process of extracting Al 2 O 3 from high-alumina fly ash by hydrochloric acid method, converting AlCl 3 into AlMnC x O y, and finally calcined at 850 °C for 2 h to obtain Al 2 O 3 . Meng et al [12] proposed a clean cation membrane electrolysis method to prepare several rare-earth precursors (Ce, La, Sm, etc.)…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The Mechanism of One‐Step Synthesis of Oxides from Metal Chlorides and Their Electrocatalytic HER Study

Lin

Zhang

et al. 2022

Crystal Research and Technology

View full text Add to dashboard Cite

It is well known that a layered structure can improve charge transfer and is a favorable catalyst material. Most of them are metal oxides, and some metal hydroxides and carbonates have also been proved to have good catalytic performance. Generally, the preparation method is to prepare the precursor and then calcinate them to get metal oxides. Through literature review and repeated experiments, it is found that cationic membrane electrosynthesis with CeCl3·7H2O as a raw material may be able to prepare metal oxides in one step. Furthermore, whether Fe, which is also a variable metal, can also form metal oxides in one step is investigated. Therefore, in this study, CeO2, Fe3O4, and Fe2O3 nanomaterials with the hierarchical structure are prepared by cationic membrane electrolytic synthesis at room temperature. The composition and microstructure of the nanomaterials are studied using XRD, FTIR, XPS, and SEM. Finally, the electrochemical hydrogen evolution performance of the samples is simply tested.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The Mechanism of One‐Step Synthesis of Oxides from Metal Chlorides and Their Electrocatalytic HER Study

Lin

Zhang

et al. 2022

Crystal Research and Technology

View full text Add to dashboard Cite

show abstract

“…Meanwhile, it can be considered to be the world's fifth largest raw materialresource [14]. According to investigation, the alumina content in Inner Mongolia's high-alumina fly ash is as high as 40-50 wt% [15][16], which is much higher than the alumina content in ordinary fly ash (20-30 wt%) and similar to China's middle and lowgrade bauxite (50-60 wt%) [17][18][19][20][21][22][23][24], indicating that high-alumina fly ash is a promising resource for alumina production [25]. Extracting aluminum(Al) and other valuable elements from high-alumina fly ash offers a precious opportunity to create high value-added products from this refractory industrial solid waste [26][27][28].…”

Section: Introductionmentioning

confidence: 99%

A novel method for alumina preparation by electrotransformation AlCl3 solution under NH4Cl-catalyzed and CO2-injected conditions

Han

Liu

Yang

et al. 2022

J min metall B Metall

View full text Add to dashboard Cite

As a refractory industrial solid waste, high-alumina fly ash is discharged into nature in large quantities, causing serious environmental harm. The extraction of valuable components, such as aluminum, from high-alumina fly ash has become a research hotspot at home and abroad. The shortcomings of traditional alumina extraction from high-alumina fly ash include long technological processes, large amounts of waste acid and alkali, and serious equipment corrosion. A novel method for alumina preparation by electrotransformation AlCl3 solution(EAS) under NH4Cl catalysis with injected CO2 has been proposed by Northeastern University. The process has advantages, such as short flow and no waste acid discharge. In this study, the influence of initial NH4Cl concentration in the cathodic chamber on solution pH, phase and morphology of electrotransformation products, phase, D(50) and D(90) of roasting products, and Al recovery rate were examined. Simultaneously, EAS was examined and compared with and without injected CO2 as well as EAS under NH4Cl catalysis with and without injected CO2. The results showed that, when the solution in the cathodic chamber was NH4Cl with CO2 injection, with electrotransformation time extension, pH increased slowly and the morphology of electrotransformation products were all rough and fluffy block structures. Increasing initial NH4Cl concentration effectively improved the product crystallization states, roasting products D(50) and D(90), and Al recovery rate.

show abstract

“…It appeared that this process was much less expensive than anion exchange resins. Adding together, the presence of aluminum in several materials may more efficiently adsorb or catalyze the oxidation of numerous organic pollutants [15,[18][19][20]. Its association with apatite to form porous nanocomposites may be cost effective and widely used in biomedical applications, especially to improve the mechanical properties of implants [21,22].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and properties of alumina-hydroxyapatite composites from natural phosphate for phenol removal from water

Bouiahya

Es-saidi

Bekkali

et al. 2019

Colloid and Interface Science Communications

View full text Add to dashboard Cite

Phenol is very abundant in the aquatic environment and therefore requires an effective treatment using porous and low-cost adsorbents. Alumina-hydroxyapatite composites were prepared from natural phosphate ore in the presence of Al 3+ ions via a wet-chemical method. Porous composites were characterized and the Al-surface modification was produced by facile and inexpensive route to uptake adjacent toxic species. Supplementary active sites on their surface may improve their phenol remediation. Nanocomposites exhibit higher phenol sorption rates than pure hydroxyapatite. It is concluded that the specific surface area, surface charge and Al content are suitable for phenol removal from aqueous solution using Alumina-hydroxyapatite composites. The results show that the retention power of these composites depends on a complex interaction between intermolecular and molecule-solid interactions. These findings are relevant to better understand the contribution of alumina content in Alumina-hydroxyapatite composites to the fate and uptake of phenol from aquatic environments.

show abstract

Investigation of alumina preparation from aluminum chloride aqueous solution by electrical transformation

Cited by 10 publications

References 19 publications

The Mechanism of One‐Step Synthesis of Oxides from Metal Chlorides and Their Electrocatalytic HER Study

The Mechanism of One‐Step Synthesis of Oxides from Metal Chlorides and Their Electrocatalytic HER Study

A novel method for alumina preparation by electrotransformation AlCl3 solution under NH4Cl-catalyzed and CO2-injected conditions

Synthesis and properties of alumina-hydroxyapatite composites from natural phosphate for phenol removal from water

Contact Info

Product

Resources

About