Green template-free synthesis and characterization of mesoporous alumina as a high value-added product in aluminum black dross recycling strategy

Mahinroosta, Mostafa; Allahverdi, Ali; Dong, Peng; Bassim, Nabil

doi:10.1016/j.jallcom.2019.04.009

Cited by 36 publications

(7 citation statements)

References 46 publications

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“…The development of the NaOH leaching method for the synthesis of mesoporous alumina is carried out using a new recycle procedure consisting of leaching, co-precipitation, separation by selective dissolution, re-precipitation, precipitation and calcination. Mesoporous alumina has a purity of more than 98% and a particle size that can be excellent candidates as a catalyst, catalyst support, or adsorbent (Mahinroosta et al, 2019). The aluminate solution leached with NaOH slightly dissolves silica.…”

Section: Recovery Of Aluminamentioning

confidence: 99%

“…Aluminum black dross from the aluminum secondary industry is hazardous waste according to European Waste Catalog and Hazardous Waste List with code 10 03 09*. Aluminum black dross is a hazardous waste because it is reactive with water and moisture which can produce toxic and flammable gases (Mahinroosta et al, 2019;Nguyen and Lee, 2019a;López-Delgado et al, 2020). During the aluminum black dross leaching process, most of the compounds dissolved and released ammonia and hydrogen gases.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Utilization of hazardous waste of black dross aluminum: processing and application-a review

Lukita¹,

Abidin²,

Riani³

et al. 2022

J.Degrade.Min.Land Manage.

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Aluminum black dross is produced by the secondary smelting process of aluminum. Aluminum black dross is classified as hazardous waste because it is reactive with water and produces substances and gases that are harmful to humans and the environment. Generally, aluminum black dross is managed by landfill method, but because it is produced in large amounts every year, the aluminum black dross needs to be utilized to reduce the impact on the environment. Aluminum black dross consists of large amounts of metal oxide and salts. The amount of metal oxide content in aluminum black dross can be used as raw material. This paper review types of processes for utilizing black dross aluminum as raw material in value-added products. aluminum black dross can be used as alumina, adsorbent, zeolite, composites, geopolymers, refractories, and fillers. By utilizing aluminum black dross waste into various products that have economic value, besides being able to protect the environment, it can also reduce environmental resource use.

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Section: Recovery Of Aluminamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Utilization of hazardous waste of black dross aluminum: processing and application-a review

Lukita¹,

Abidin²,

Riani³

et al. 2022

J.Degrade.Min.Land Manage.

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“…Therefore, the application of η-Al 2 O 3 is rarely reported . The preparation methods of activated alumina include the sol–gel method, , the hydrolysis–precipitation method, , the hydrothermal method, , etc. However, the products prepared via these methods are usually nanomaterials, which are difficult to be separated and tend to agglomerate and deactivate in the reaction due to their small sizes in liquid-phase reaction. , …”

Section: Introductionmentioning

confidence: 99%

“…Meanwhile, micron-sized-sphere-based catalysts are a good choice to increase their mechanical strength and reduce their fluid resistance. , Moreover, the alumina-supported noble-metal catalyst generally shows an egg-shell-like structure, and the spherical supports are more advantageous for the high dispersion distribution of the noble metals on their surface. , Therefore, the preparation of spherical alumina can effectively improve its application prospect. The cheap NaAlO 2 solution, as the most important intermediate of the Bayer process for the production of metallurgical grade alumina, is also an ideal aluminum source for the preparation of chemical alumina with special functions. , γ-Al 2 O 3 microspheres with particle sizes of ca. 1.5 μm have been prepared using NaAlO 2 as an aluminum source, urea as a precipitant, and F127 as a structure modifier via the hydrothermal method .…”

Section: Introductionmentioning

confidence: 99%

Fast, Large-Scale, and Stable Preparation of η-Al₂O₃ Microspheres by Fully Utilizing N,N-Dimethylformamide at Room Temperature

Yang

Cai

Zhou

et al. 2020

Ind. Eng. Chem. Res.

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A fast, large-scale, and stable preparation method was successfully developed to obtain η-Al2O3 microspheres with particle sizes of 3–10 μm from cheap and widely sourced NaAlO2 solution using N,N-dimethylformamide (DMF) as a morphological modifier and a precipitant simultaneously at room temperature. The yield of alumina increases from 33.3 to 77.3% by increasing the dose of DMF from 100 to 400 mL. The utilization efficiency of DMF significantly increased by adding fresh NaAlO2 into the reused filtrate after separating the bayerite precipitate (precursor of η-Al2O3). Importantly, the η-Al2O3 microspheres obtained from the filtrate-reuse experiments show the stable phase structures, morphologies, and pore structure properties. Furthermore, the typical η-Al2O3 microspheres supported Pd catalyst presents a higher catalytic activity of 10.6 g/L for the hydrogenation of anthraquinone than that of the commercial γ-Al2O3-supported Pd catalyst (8.5 g/L), suggesting that the as-prepared η-Al2O3 microspheres have good application prospects for catalytic hydrogenation and related fields.

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“…In general, the SAD primarily contains Al 2 O 3 , aluminum metal, AlN, NaCl, KCl, SiO 2 , Si, and MgAl 2 O 4 . As a rough estimation in a recent report [ 1 ], more than a million tons of the SAD are produced throughout the world each year. Nevertheless, it should be noted that nearly 95% of the SAD is dumped in landfills, which imposes a severe menace to the ecosystem [ 2 ].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Cryolite (Na3AlF6) from Secondary Aluminum Dross Generated in the Aluminum Recycling Process

Wan

Sun

et al. 2020

Materials

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Secondary aluminum dross (SAD) is regarded as a solid waste of aluminum recycling process that creates serious environmental and health concerns. However, SAD can also be used as a good source of aluminum, so that utilizing the SAD for the production of valuable products is a promising approach of recycling such waste. In the present work, a novel eco-friendly three-step process was proposed for the synthesis of cryolite (Na3AlF6) from the SAD, and it consisted of (1) water-washing pretreatment of SAD, (2) extraction of Al component via pyro-hydrometallurgy, including low-temperature alkaline smelting, water leaching and purification of leachate in sequence, (3) precipitation of cryolite from the purified NaAlO2 solution using the carbonation method. By analysis of the parameter optimization for each procedure, it was found that the maximum hydrolysis efficiency of aluminum nitride (AlN) in the SAD was around 68.3% accompanied with an extraction efficiency of Al reaching 91.5%. On this basis, the cryolite of high quality was synthesized under the following optimal carbonation conditions: reaction temperature of 75 °C, NaAlO2 concentration of 0.11 mol/L, F/(6Al) molar ratio of 1.10, and 99.99% CO2 gas pressure, and flow rate of 0.2 MPa and 0.5 L/min respectively. The formation of Na3AlF6 phase can be detected by XRD. The morphological feature observed by SEM revealed that the as-synthesized cryolite had a polyhedral shape (~1 μm size) with obvious agglomeration. The chemical composition and ignition loss of the as-synthesized cryolite complied well with the requirements of the Chinese national standard (GB/T 4291-2017).

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Green template-free synthesis and characterization of mesoporous alumina as a high value-added product in aluminum black dross recycling strategy

Cited by 36 publications

References 46 publications

Utilization of hazardous waste of black dross aluminum: processing and application-a review

Utilization of hazardous waste of black dross aluminum: processing and application-a review

Fast, Large-Scale, and Stable Preparation of η-Al₂O₃ Microspheres by Fully Utilizing N,N-Dimethylformamide at Room Temperature

Synthesis of Cryolite (Na3AlF6) from Secondary Aluminum Dross Generated in the Aluminum Recycling Process

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Green template-free synthesis and characterization of mesoporous alumina as a high value-added product in aluminum black dross recycling strategy

Cited by 36 publications

References 46 publications

Utilization of hazardous waste of black dross aluminum: processing and application-a review

Utilization of hazardous waste of black dross aluminum: processing and application-a review

Fast, Large-Scale, and Stable Preparation of η-Al2O3 Microspheres by Fully Utilizing N,N-Dimethylformamide at Room Temperature

Synthesis of Cryolite (Na3AlF6) from Secondary Aluminum Dross Generated in the Aluminum Recycling Process

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Product

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Fast, Large-Scale, and Stable Preparation of η-Al₂O₃ Microspheres by Fully Utilizing N,N-Dimethylformamide at Room Temperature