Study on microwave-assisted grinding and liberation characteristics for Ludwigite

Huang, Weijun; Liu, Yajing

doi:10.1080/08327823.2021.1877245

Cited by 4 publications

(2 citation statements)

References 27 publications

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“…Microwave and grinding techniques were used for heterocyclic synthesis to obtain an environmentally friendly methods are in accordance with the green chemistry principles [ 49 – 51 ]. Our objective was to develop a synthetic method for the reaction of 5-amino-1,3-diphenyl-1H-pyrazole-4-carbonitrile (1) with different nucleophilic and electrophilic reagents using microwave and grinding techniques.…”

Section: Resultsmentioning

confidence: 99%

Green synthesis of highly functionalized heterocyclic bearing pyrazole moiety for cancer-targeted chemo/radioisotope therapy

Anwer,

Sayed,

Essa

et al. 2023

BMC Chemistry

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New derivatives of heterocyclic bearing pyrazole moiety were synthesized (eight new compounds from 2 to 9) via green synthesis methods (microwave-assisted and grinding techniques). 4,6-Diamino-1,3-diphenyl-1H-pyrazolo[3,4-b]pyridine-5-carbonitrile (2) shows high anti-cancer activity against both HepG2 and HCT-116 with IC50 of 9.2 ± 2.8 and 7.7 ± 1.8 µM, respectively, which referenced to 5-Fu which is showing activity of 7.86 ± 0.5 and 5.35 ± 0.3 against both HepG2 and HCT-116, respectively. The cytotoxic activity against HCT-116 and HepG2 was slightly decreased and slightly increased, respectively, by a different pyrazole moiety (compound 5). Pharmacokinetics of compound 2 was carried out using the radioiodination technique in tumour-bearing Albino mice which shows good uptake at the tumour site. The biodistribution showed high accumulation in tumour tissues with a ratio of 13.7% ID/g organ after one hour in comparison with 2.97% ID/g organ at normal muscle at the same time point. As I-131 has maximum beta and gamma energies of 606.3 and 364.5 keV, respectively, therefore the newly synthesized compound 2 may be used for chemotherapy and TRT.

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Section: Resultsmentioning

confidence: 99%

Green synthesis of highly functionalized heterocyclic bearing pyrazole moiety for cancer-targeted chemo/radioisotope therapy

Anwer,

Sayed,

Essa

et al. 2023

BMC Chemistry

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show abstract

“…Therefore, it is very important to find a new method to systematically reveal the broken mechanism of the WPCB and realize the efficient dissociation of metal and non-metal and the efficient extraction of metal. Microwave technology is selective and internally heated compared to traditional heat-assisted fragmentation and some chemical methods. , Microwave irradiation produces an internal heating effect on microwave-sensitive materials, , creating thermal stresses and cracks between different components and achieving monomeric dissociation of useful minerals . Theoretically, the separation of metals and non-metals in WPCB can be carried out according to their different wave absorption properties, thus improving the dissociation of metallic copper in WPCB and thus the subsequent metal leaching effect …”

Section: Introductionmentioning

confidence: 99%

Effect of Microwave Pretreatment on the Leaching and Enrichment Effect of Copper in Waste Printed Circuit Boards

Huang

et al. 2023

ACS Omega

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The use of efficient and clean methods for the recycling of waste circuit boards is an ongoing challenge. In this research, the effect of microwave pretreatment on the leaching and enrichment of copper from waste print circuit board (WPCB) was studied. The morphology and chemical structure of WPCB particles before and after microwave pretreatment were analyzed by SEM/EDS and Fourier infrared spectroscopy. Leaching experiments and copper enrichment tests were designed to investigate the effect of different microwave irradiation powers and microwave irradiation times on the copper leaching rate and copper enrichment rate in WPCB. The leaching experiment results showed that microwave pretreatment can effectively improve the leaching rate of WPCB. When the microwave irradiation power was 700 W, the irradiation time was 120 s, and the leaching time was 15 min, the copper leaching rate in WPCB was 57.01%, which was 24.34% higher than that in the untreated condition. The results of copper enrichment experiment show that microwave pretreatment can effectively improve the copper enrichment of WPCB. After microwave pretreatment, copper was effectively enriched in the 4–2 and 2–1 mm particle sizes. When the microwave irradiation time was 120 s, the copper enrichment rates in the 4–2 and 2–1 mm particle sizes were 1.74 and 1.66, which increased by 0.63 and 0.32, respectively, compared to the untreated condition. Microwave pretreatment enables the effective separation of metallic copper from non-metallic components in WPCB, increasing the exposure area of copper and promoting the monomer separation of copper, thus improving the leaching and enrichment of copper.

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Effect of ludwigite on sintering and metallurgical properties

Gao,

Liu,

Chu

et al. 2023

Metall. Res. Technol.

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Ludwigite is a multi-element coexisting iron ore. Through the sinter pot experiment, the effect of ludwigite on the metallurgical properties of the sinter is studied, and its action mechanism is revealed combined with X-ray diffraction (XRD) analysis. The appropriate amount of ludwigite is obtained on the evaluation mechanism of softening and melting properties of the sinter, which provides theoretical guidance for practical production. The results show that with the increase of the amount of ludwigite, the yield, vertical sintering speed, and drum index in the metallurgical properties of the sinter show a gradual downward trend, and the low-temperature reduction pulverization index RDI+3.15 shows a gradual upward trend. The addition of ludwigite is conducive to the formation of calcium ferrite and promotes the activity of MgO. The addition of excessive ludwigite will lead to the formation of Mg2B2O5 and Ca3B2O6, Slag phase is formed. With the increase of the proportion of ludwigite, the melting range of the sinter is slightly widened, and the permeability is improved first and then reduced. Under this ore blending condition, ludwigite resources can be added and used in sintering batching, and the proportion shall not exceed 6%.

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Study on microwave-assisted grinding and liberation characteristics for Ludwigite

Cited by 4 publications

References 27 publications

Green synthesis of highly functionalized heterocyclic bearing pyrazole moiety for cancer-targeted chemo/radioisotope therapy

Green synthesis of highly functionalized heterocyclic bearing pyrazole moiety for cancer-targeted chemo/radioisotope therapy

Effect of Microwave Pretreatment on the Leaching and Enrichment Effect of Copper in Waste Printed Circuit Boards

Effect of ludwigite on sintering and metallurgical properties

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