The dissolution of oil sludge formed by flocculation of oily wastewater produced from polymer flooding

被引：8
|
作者：
Duan, Ming [1 ,2 ]
Yao, Meng [1 ,2 ]
Zhao, Bo [3 ]
Chen, Bin [4 ]
Xiong, Yan [1 ,2 ]
Fang, Shenwen [1 ,2 ]
Zhao, Yudong [5 ]
机构：
[1] Southwest Petr Univ, Sch Chem & Chem Engn, Chengdu 610500, Sichuan, Peoples R China
[2] Oil & Gas Appl Chem Key Lab Sichuan Prov, Chengdu 610500, Sichuan, Peoples R China
[3] XinJiang Branch Force New Technol Dev Co Ltd, Xinjiang 834000, Peoples R China
[4] CNOOC Energy Technol Drilling & Prod Co, Tianjin 300452, Peoples R China
[5] Petr Engn Res Inst Dagang Oilfield, Tianjin 300280, Peoples R China
来源：
CANADIAN JOURNAL OF CHEMICAL ENGINEERING | 2019年 / 97卷 / S1期
关键词：
polyelectrolyte complex; oily wastewater; polymer flooding; dissolution mechanism;
D O I：
10.1002/cjce.23358
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
During the treatment of oily wastewater produced from polymer flooding (OWPF) by cationic flocculant, oil sludge containing the polymer could be formed. In this paper, the formation mechanism of the oil sludge was discussed for the first time and a novel method was proposed for dissolving the oil sludge. The investigation showed that the polyelectrolyte complex could be formed between the cationic flocculant and the polymer in the OWPF. The polyelectrolyte complex was cross-linked and was insoluble in the water. Oil droplets may be bound by the complex, and the oil sludge was formed. It was found that the oil sludge can be dissolved in sodium dodecyl sulphate (SDS) solution, and the mechanism study showed that SDS can destroy the water-insoluble polyelectrolyte complex. Finally, a water-soluble cationic flocculant-SDS complex was formed.
引用
收藏
页码：1283 / 1288
页数：6
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