Adsorption of hydrophobically modified polyacrylamide P(AM-NaAA-C16DMAAC) on model coal and clay surfaces and the effect on selective flocculation of fine coal

Zou, Wenjie; Gong, Lu; Huang, Jun; Zhang, Zhijun; Sun, Chunbao

doi:10.1016/j.mineng.2019.105887

Cited by 49 publications

(12 citation statements)

References 29 publications

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“…Materials. HMPAM were synthesized using the procedures described in our previous work [31,32]. Diiodomethane, glycerol, hydrogen peroxide and sulfuric acid were purchased from Fisher Scientific (China).…”

Section: Methodsmentioning

confidence: 99%

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Interaction and Adsorption of Hydrophobically Modified Polyacrylamide on Silica and Asphaltene Surfaces

Zou

Fang

Zhang

et al. 2019

Advances in Polymer Technology

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The adsorption of polymers affects the cost and oil recovery in oil reservoir exploitation and the flocculation effect in the treatment of oil sand tailings. The adhesion and adsorption of a hydrophobically modified polyacrylamide (HMPAM), i.e., P(AM-NaAA-C16DMAAC), on silica and asphaltene were investigated using surface force measurements, thermodynamic analysis and quartz crystal microbalance with dissipation (QCM-D) measurement. Our study indicates that HMPAM polymer has strong interaction with both silica and asphaltene. The adhesion force of HMPAM on silica was stronger than that on asphaltene surface. Consistently, the adsorption of HMPAM was also greater on silica surface, with a more rigid layer formed on the surface. For HMPAM/silica system, the attractive interaction and the strong adhesion are mainly driven by the hydrogen bonding and electrostatic interaction. For HMPAM/asphaltene system, it is mainly due to hydrophobic interaction between the long hydrocarbon chains of HMPAM and asphaltene. Furthermore, continuous adsorption of HMPAM was detected and multiple layers formed on both silica and asphaltene surfaces, which can be attributed to the hydrophobic chains of HMPAM polymers. This work has illustrated the interaction mechanism of HMPAM polymer on hydrophilic silica and hydrophobic asphaltene surfaces, which provide insight into the industrial applications of hydrophobically modified polymer.

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Section: Methodsmentioning

confidence: 99%

“…e asphaltene sensors for QCM-D were prepared by spin-coating asphaltene solution onto OTS-treated silica sensors following the procedures shown in the literature [31]. Briefly, silica sensor was washed with 2% SDS, milli-Q water and UV/ozone followed the cleaning protocols provided by the Biolin Scientific.…”

Section: Preparation Of Asphaltene Surfacesmentioning

confidence: 99%

Interaction and Adsorption of Hydrophobically Modified Polyacrylamide on Silica and Asphaltene Surfaces

Zou

Fang

Zhang

et al. 2019

Advances in Polymer Technology

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“…Сополимеры различных (мет)акриловых эфиров с азотсодержащими виниловыми мономерами находят применение в нефтехимии [1,2], в биомедицине [3], в качестве флокулянтов [4,5] и в других областях. В частности, аминосодержащие органорастворимые сополимеры алкил(мет)акрилатов и амино(мет)акриламидов применяются в качестве вязкостно-диспергирующих присадок для нефтяных масел [6,7].…”

Section: Introductionunclassified

Regularities of the radical copolymerization of dodecyl (meth) acrylate and a new cationic monomer N-(dibutylaminomethyl) methacrylamide

Arifullin

Shirshin²,

Казанцев

et al. 2021

Plastičeskie massy

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The regularities of radical copolymerization of dodecyl methacrylate (DMA) or dodecyl acrylate (DA) with a new cationic monomer - N-(dibutylaminomethyl) methacrylamide (DBAMMA) in toluene solutions were determined. The copolymers formed at low conversions in the DMA-DBAMMA system are enriched in ether units, and in the DA-DBAMMA system - in aminoamide units. The relative activities of comonomers determined by the Feineman-Ross and Kehlen-Tudosh methods in the first case were 1.56-1.60 (DMA) and 0.87-0.89 (DBAMMA), in the second case - 0.53-0.64 (DA) and 0.80-0.90 (DBAMMA).

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“…Furthermore, they observed a strong correlation between the results for hydrophobic flocculation and ignition temperatures of lignite. The experimental results of Zou et al (2019) showed that the recovery of selective flocculation flotation of fine coal particles could be enhanced with hydrophobically modified polyacrylamide P(AM-NaAAC16DMAAC) at a lower dosage of the collector. Lin et al (2020) used a fluidized bed flocculator with a decreasing fluid shear intensity in steps and reported that this flocculation was promising in the flocculation of coal-slime water.…”

Section: Introductionmentioning

confidence: 99%

Investigation of flocculation properties and floc structure of coal processing plant tailings in the presence of monovalent and divalent ions

Güngören

Kurşun

Özdemir

2020

Physicochem. Probl. Miner. Process.

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Low-rank coals are generally processed with wet methods including washing, flotation, etc. Fine-sized tailings of these processes are discharged to tailing ponds with a significant amount of associated water which contains a high amount of dissolved ions. These tailings should be dewatered employing coagulation/flocculation in terms of technological and environmental aspects. In this study, the coagulation/flocculation behavior of coal processing plant tailings obtained from Manisa, Turkey was investigated in the presence of monovalent (Na + , K +) and divalent (Mg 2+ , Ca 2+) ions and an anionic flocculant (SPP-600). First, the coagulation properties of coal tailings were determined. Then, the flocculation experiments were carried out, and the turbidity values of the suspensions were measured. Moreover, the sizes of the flocs were determined using a laser diffraction particle size analyzer to analyze the strength of the flocs. The results of the coagulation experiments showed that while divalent ions were more effective at 10-1 mol/dm 3 , higher settling rate and lower turbidity values were obtained in the presence of monovalent ions at 1 mol/dm 3 concentration. The optimum flocculant dosage was obtained as 150 g/Mg from the flocculation experiments. The floc size and strength measurements indicated that the larger flocs were obtained with Na + than Ca 2+ in the presence of the flocculant. The strongest flocs were obtained at 10-1 mol/dm 3 Ca 2+ + 150 g/Mg flocculant. It can be concluded from this study that the coagulation followed by the flocculation method can be employed to obtain fast flocculation behavior and low turbidity for the dewatering of coal tailings.

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Adsorption of hydrophobically modified polyacrylamide P(AM-NaAA-C16DMAAC) on model coal and clay surfaces and the effect on selective flocculation of fine coal

Cited by 49 publications

References 29 publications

Interaction and Adsorption of Hydrophobically Modified Polyacrylamide on Silica and Asphaltene Surfaces

Interaction and Adsorption of Hydrophobically Modified Polyacrylamide on Silica and Asphaltene Surfaces

Regularities of the radical copolymerization of dodecyl (meth) acrylate and a new cationic monomer N-(dibutylaminomethyl) methacrylamide

Investigation of flocculation properties and floc structure of coal processing plant tailings in the presence of monovalent and divalent ions

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