Characterization of Colloidal Solids from Athabasca Fine Tails

Kotlyar, L.S.; Deslandes, Yves; Sparks, B.D.; Kodama, Hiroyuki; Schutte, R.

doi:10.1346/ccmn.1993.0410309

Cited by 35 publications

(22 citation statements)

References 6 publications

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“…2a, they are irregular-shaped clay platelets varying in diameter roughly from 50 to 500 nm and with a thickness of approximately 8 nm. These results were consistent with TEM observations of bitumen solids and mature fine tailings made by others [10,28,56]. They were also consistent with the particle size analysis, Fig.…”

Section: Coker-feed Bitumensupporting

confidence: 93%

Oilfield solids and water-in-oil emulsion stability

Sztukowski

Yarranton

2005

Journal of Colloid and Interface Science

140

113

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Section: Coker-feed Bitumensupporting

confidence: 93%

Oilfield solids and water-in-oil emulsion stability

Sztukowski

Yarranton

2005

Journal of Colloid and Interface Science

140

113

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“…In contrast, our results for high fines tailings (40.1% fines) with Al-PAM as flocculant, discussed above, suggest that at appropriate dosage and mixing conditions, it is feasible to filter total tailings from high fines ores with Al-PAM addition which reduced the SFR values from 10 12 to 10 9 (m/kg). A technical question arises as to why Al-PAM was an effective filtration aid for the tested oil sands tailings but not ( Kotlyar et al, 1993). Therefore, the Al-PAM can strongly attach to the clay surface in the form of -O-Al-O-]-Al-PAM linkage.…”

Section: Filtration Test Resultsmentioning

confidence: 99%

Polymer aids for settling and filtration of oil sands tailings

Wang¹,

Feng²,

Xu³

et al. 2010

Can J Chem Eng

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Commercial Magnafloc 1011 (Percol 727) polymer and in-house synthesised Al-PAM polymer were used to flocculate oil sands tailings that were derived from low and high fines oil sands ores. Fines are defined as mineral solids less than 44 m. The performance of polymers was evaluated in terms of tailings settling, filtration rate, and final moisture content of tilter cakes. Both polymers were shown to effectively flocculate the derived oil sands tailings and hence to enhance tailings settling. Al-PAM performed very well as a filtration aid. The final moisture content of the filter cake obtained from tailings derived from the low fines ore was 6.6 ± 1.2 wt.% and that from the high fines ore was 16.9 ± 0.8 wt.%. This class of polymer can provide an alternative approach for oil sands tailings disposal that has the potential to eliminate tailings ponds. However, the commercial Magnafloc 1011 polymer was found ineffective as a filtration aid for the two tailings tested in this study.Le polymère commercial Magnafloc 1011 (Percol 727) et un polymère synthétiséà l'interne Al-PAM ontété utilisés pour floculer des résidus de sables bitumineux dérivés de minerais de sables bitumineuxà hautes et faibles concentrations de matériaux fins. Les matériaux fins sont définis comme des solides minéraux de moins de 44 m. Le rendement des polymères aétéévalué en termes de la décantation des résidus, du taux de filtration et du contenu final en humidité des gâteaux des réservoirsà basculement. Les deux polymères ont démontré leur capacité a floculer efficacement les résidus de sables bitumineux dérivés et doncà améliorer la décantation des résidus. Le polymère Al-PAM a produit de très bons résultats comme aide de filtration. Le contenu final en humidité du gâteau de filtre obtenuà partir des résidus dérivés du mineraì a faible concentration de matériaux finsétait de 6,6 ± 1,2 en % de poids et de 16,9 ± 0,8 pour le mineraià forte concentration de matériaux. Cette catégorie de polymères peut offrir une approche alternative pour la mise au rebut des résidus de sables bitumineux, alternative qui aurait le potentiel d'éliminer les bassins de décantation de résidus. Cependant, le polymère commercial Magnafloc s'est prouvé inefficace comme aide de filtration pour les deux résidus testés dans cetteétude.

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“…In addition to clay composition, the inhomogeneous coating of clay surfaces by bitumen or other organic compounds may lead to other differences in behaviour between pure kaolinite and tailings. Kotlyar et al used X‐ray photoelectron spectroscopy (XPS) to identify polar carbon‐based functionalities (carbonyl, carboxyl, and carbonate groups) in the finest MFT size fraction . They performed these analyses on the colloidal solids obtained after bitumen was removed by toluene.…”

Section: The Multi‐dimensional Problem Of Tailingsmentioning

confidence: 99%

“…Kotlyar et al used X-ray photoelectron spectroscopy (XPS) to identify polar carbon-based functionalities (carbonyl, carboxyl, and carbonate groups) in the finest MFT size fraction. [47] They performed these analyses on the colloidal solids obtained after bitumen was removed by toluene. The carbon-based functionalities were not considered to be part of the bitumen, but rather associated with bitumen and potentially responsible for compatibilizing bitumen with clay surfaces.…”

Section: Clay Characterizationmentioning

confidence: 99%

The Influence of Tailings Composition on Flocculation

Botha

Soares

2015

Can J Chem Eng

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It is hard to treat fine tailings resulting from oil sands extraction processes. No current fine tailings treatment technology can completely eliminate tailings ponds, despite considerable efforts to address the slow settling of fines and to facilitate the consolidation of sediments. Some treatments use coagulants and coarse solids to form composite or consolidated tailings; others use polymer flocculants. The performance of polymer flocculants is evaluated empirically, with fine tailings often being considered as a black box. Some fundamental studies use single clay systems, such as kaolinite suspended in water, as models to evaluate the performance of polymer flocculants. While it is easier to relate polymer performance to specific conditions in these simpler systems, it is difficult to translate these results to the treatment of the much more complex tailings environment. For the rational design of polymer flocculants, one must understand the interactions between polymers and the several components in tailings. With this information in hand, one can optimize the molecular structure of polymer flocculants to treat oil sands tailings efficiently. In this review, we summarize the published research on flocculation performance within the context of complex fine tailings systems. Furthermore, we describe the compositional complexity of mature fine tailings to help the design of more representative model tailings systems.

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Characterization of Colloidal Solids from Athabasca Fine Tails

Cited by 35 publications

References 6 publications

Oilfield solids and water-in-oil emulsion stability

Oilfield solids and water-in-oil emulsion stability

Polymer aids for settling and filtration of oil sands tailings

The Influence of Tailings Composition on Flocculation

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