Composition, purification, and identification of carbon matter in coal-series kaolin by COD analysis

Teng, Hao; Lei, Shaomin; Liu, Yuanyuan; Fan, Yanming

doi:10.1007/s11164-018-3505-y

Cited by 5 publications

(2 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The absorption peak at 1421 cm −1 belonged to the H‐O‐H bending vibration of water molecules, and the hydroxyl group was responsible for the reaction with the silane coupling agent. The peaks at 981 and 910 cm −1 were caused by Si‐O‐Si antisymmetric stretching and Al‐O‐Al vibration, [ 23 ] characteristic CG peaks. The bands at 823, 800 and 530 cm −1 were attributed to the bending vibration of Al‐OH, Si‐O symmetrical tensile vibration and bending vibration.…”

Section: Resultsmentioning

confidence: 99%

A novel coal gangue thermal stabilizer and its effect on thermal stability and mechanical properties of poly(vinyl chloride)

Hou

et al. 2022

Vinyl Additive Technology

View full text Add to dashboard Cite

Nontoxic and efficient coal gangue thermal stabilizer (Y-CG) was prepared by cheap and readily available calcium oxide, coal gangue (CG) and stearic acid(SA). The proposed mechanism of Y-CG thermal stability was studied by XRD, FT-IR, BET and thermal stability test. The results show that when the mass ratio of CG to water was 1:7, the loading of Ca(OH) 2 between CG sheets reached the maximum value of 3.01 mmol/g. The hydrophobic property of the Y-CG surface was better when modified at 75 C for 2 h with 5% SA. With 10% Y-CG, the Congo red test showed thermal stabilization time of PVC improved up to 55.9 min and the torque rheological test showed dynamic thermal stabilization time of PVC improved up to 62.10 min. The TG curves show that Y-CG had little effect on the onset degradation temperature of PVC. Still, Y-CG can absorb HCl and initiate the carbonization of PVC to inhibit degradation. Compared with the commonly used thermal stabilizers, the thermal stability of Y-CG was only slightly worse than that of hydrotalcite thermal stabilizers. The early reaction was that the strong base Ca(OH) 2 in Y-CG adsorbs HCl, and the CaCl 2 was stably loaded in the CG layered structure, which avoided the adverse effects caused by strongly alkaline. The late reaction was that SA and Ca(OH) 2 form weakly alkaline calcium stearate to absorb HCl. At the same time, calcium stearate can also be used as a compatibilizer to improve the compatibility between Y-CG and PVC.

show abstract

Section: Resultsmentioning

confidence: 99%

A novel coal gangue thermal stabilizer and its effect on thermal stability and mechanical properties of poly(vinyl chloride)

Hou

et al. 2022

Vinyl Additive Technology

View full text Add to dashboard Cite

show abstract

“…The kaolin decarburized by the gravity separation method was whiter than that carburized by raw materials. Huang [14] confirmed that carbon had a great influence on the COD value of coal gangue, removing carbon from raw materials via the flotation method. The COD value of carbon products obtained after flotation was 216,202 µg/g, much higher than that of raw materials and kaolin products.…”

Section: Introductionmentioning

confidence: 94%

Research on the Preparation of Kaolin from Coal Gangue by Flotation Decarburization with Different Collectors

Ren,

Shu,

et al. 2023

Processes

View full text Add to dashboard Cite

In order to find a better collector for the separation of carbon and kaolin from coal gangue flotation, and to explore the action mechanism of collectors, this paper selected 12 kinds of collectors for systematic comparison, including five non-polar organics with different carbon chain lengths, and polar organic matters with double bonds, triple bonds, benzene, as well as cycloalkyl, ester, carboxyl, and aldehyde groups. The flotation results show that the longer carbon chain (with a carbon atom number of 13~15), the better the flotation effect, the better the effect of the collector with the phenyl group (among the four hydrocarbon groups), and the better the effect of the collector with the ester group (among the three functional groups). In order to explore the flotation mechanism at the microscopic level, the molecular structure of carbon in coal gangue was detected using a solid nuclear magnetic test. Afterwards, the organic macromolecule model of carbon was simulated. Finally, the interaction energy values between carbon and collectors were calculated in accordance with the density functional theory, and the order of the acting force of collectors was obtained, which was consistent with that of the collectors in the macro experiment.

show abstract

In-situ synthesis of nitride whiskers-bonded SiAlON–Al2O3 ceramics for solar thermal storage by aluminothermic nitridation of coal-series kaolin

Lao

et al. 2022

Ceramics International

View full text Add to dashboard Cite

Composition, purification, and identification of carbon matter in coal-series kaolin by COD analysis

Cited by 5 publications

References 29 publications

A novel coal gangue thermal stabilizer and its effect on thermal stability and mechanical properties of poly(vinyl chloride)

A novel coal gangue thermal stabilizer and its effect on thermal stability and mechanical properties of poly(vinyl chloride)

Research on the Preparation of Kaolin from Coal Gangue by Flotation Decarburization with Different Collectors

In-situ synthesis of nitride whiskers-bonded SiAlON–Al2O3 ceramics for solar thermal storage by aluminothermic nitridation of coal-series kaolin

Contact Info

Product

Resources

About