Flocculation of oil sands tailings by hyperbranched functionalized polyethylenes (HBfPE)

被引：41

作者：

Botha, Linda ^{[1
]}

Davey, Stepheney ^{[1
]}

Nguyen, Benjamin ^{[1
]}

Swarnakar, Anindya K. ^{[2
]}

Rivard, Eric ^{[2
]}

Soares, Joao B. P. ^{[1
]}

机构：

[1] Univ Alberta, Dept Chem & Mat Engn, Edmonton, AB, Canada

[2] Univ Alberta, Dept Chem, Edmonton, AB, Canada

来源：

MINERALS ENGINEERING | 2017年 / 108卷

基金：

加拿大创新基金会; 加拿大自然科学与工程研究理事会;

关键词：

Oil sands tailings; Flocculation; Dewatering; Functionalized polyethylene; MATURE FINE TAILINGS; FILTRATION; ETHYLENE; BITUMEN; SOLIDS; NMR;

D O I：

10.1016/j.mineng.2017.02.004

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

We synthesized a series of hyperbranched functional polyethylene (HBfPE) flocculants with functional group contents ranging from 30 and 50 mol%, and used them to flocculate oil sands mature fine tailings (MFT). MFTs (diluted to a concentration of 20 wt%) treated with the novel FIBRE had higher settling rates, lower capillary suction time (CST), and lower turbidity than when treated with a reference polyacrylamide (PAM). Within the HBfPE series, the settling performance improved when the functional group content in the copolymer increased. When combined with centrifugation, the HBfPE flocculants generated sediments with higher solids contents than PAM within a shorter centrifugation time. This may be attributed to the tendency of HBfPE to form smaller flocs that compact more tightly than PAM. Floc development for HBfPE and PAM was compared with focused beam reflectance measurement (FBRM). While floc formation with HBfPE and PAM was similar, it required significantly less mixing energy for optimal performance, due to the significantly lower molecular weight (<10,000 g/mol) of HBfPE. 2017 Elsevier Ltd. All rights reserved.

引用

页码：71 / 82

页数：12

共 23 条

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