Dewatering Oil Sands Mature Fine Tailings (MFTs) with Poly(acrylamide-co-diallyldimethylammonium chloride): Effect of Average Molecular Weight and Copolymer Composition
| Autor: | Rina Guillermo, João B. P. Soares, Vahid Vajihinejad |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Chromatography
General Chemical Engineering Comonomer Cationic polymerization 02 engineering and technology General Chemistry 021001 nanoscience & nanotechnology Dewatering Chloride Industrial and Manufacturing Engineering law.invention chemistry.chemical_compound 020401 chemical engineering chemistry Chemical engineering law Acrylamide Copolymer medicine 0204 chemical engineering 0210 nano-technology Chemical composition Filtration medicine.drug |
| Zdroj: | Industrial & Engineering Chemistry Research. 56:1256-1266 |
| ISSN: | 1520-5045 0888-5885 |
| DOI: | 10.1021/acs.iecr.6b04348 |
| Popis: | Copolymers of acrylamide and cationic comonomers such as diallyldimethylammonium chloride can effectively dewater solid suspensions containing negatively charged fine particles. A good example of such suspensions is oil sands mature fine tailings (MFTs). However, little is known about the impact of the microstructure of copolymers in dewatering performance. In this study, we used a surface response methodology to systematically assess the impact of chemical composition and average molecular weight of poly(acrylamide-co-diallyldimethylammonium chloride) in dewatering MFTs. We controlled the chemical composition and average molecular weight of the copolymers by manipulating feed monomer/comonomer ratios and initiator concentration. We found both the copolymer composition and the molecular weight averages were statistically significant variables for initial settling rates and supernatant turbidities of flocculated MFTs. However, capillary suction time and resistance to filtration depended only on copolymer c... |
| Databáze: | OpenAIRE |
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