Journal of Petrochemical Universities

Journal of Petrochemical Universities ›› 2009, Vol. 22 ›› Issue (3): 60-65.DOI: 10.3696/j.issn.1006-396X.2009.03.015

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Flocculatility and Mechanism of MDFFA Composite System

  

  1. State Key Laboratory of Heavy Oil Processing，Faculty of Chemical Science and Engineering, China University of Petroleum, Beijing 102249, P. R. China
  • Received:2008-06-30 Revised:2009-04-05 Published:2009-09-25 Online:2009-09-25

MDFFA复配体系的絮凝性能及机理初探

董俊艳,高芒来*,陈 瑞,李进进   

  1. 中国石油大学（北京）化学科学与工程学院，重质油国家重点实验室，北京102249
  • 作者简介:董俊艳(1982 -), 女, 河南濮阳市, 在读硕士
  • 基金资助:
    北京市教委共建计划项目(XK114140479)

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Abstract:

The flocculability of composite system of molecular deposition filming flooding agent(MDFFA) and fluorine-containing cationic surfactant (FC-4), decamethonium bromide (DMB), hexadecyl trimethyl ammonium (CTAB) was investigated, and the preliminary flocculation mechanism of these composite flocculants was discussed by analyzing Zeta potential on bentonite suspension. The results show that DMB and MDFFA have better flocculation capability on bentonite suspension. FC-4/MDFFA composite system has synergistic effect. 10%FC-4, 90%DMB and 10%CTAB appear best flocculability on bentonite suspension. Several tests on treating oil emulsion contenting bentonite reveal that the floccculability follows the order CTAB> DMB>MDFFA>FC-4. 90%FC-4, 70%DMB and 90%CTAB have best flocculability. Flocculating mechanism of FC-4, CTAB and their mixed systems with MDFFA is mainly charge neutralization, while MDFFA,DMB and DMB/MDFFA composite system is mainly compress electricity double layer.

Key words: Molecular deposition filming flooding agent（MDFFA） , Flocculability , Composite system , Zeta potential

摘要： 考察了MD膜剂(MDFFA)与十烷双铵(DMB)、十六烷基三甲基溴化铵 (CTAB)、氟碳表面活性剂( FC-4)复配体系的絮凝性能，并通过 Zeta电位的分析初步探讨了其絮凝作用机理。结果表明，二价阳离子(MDFFA，DMB)对膨润土悬浮液的絮凝性能较好，MDFFA和 FC-4复配具有协同作用；10% FC-4，90%DMB及10%CTAB体系絮凝性能最好。对膨润土原油乳状液的絮凝性能依次为 CTAB> DMB> MDFFA> FC-4；90% FC-4，70%DMB及 90%CTAB絮凝效果最好。FC-4和 CTAB及其复配体系主要作用机理为电中和作用，MDFFA 和 DMB及 DMB/MDFFA体系主要作用机理为压缩双电层。

关键词: MDFFA , 絮凝性 , 复配体系 , Zeta 电位

Cite this article

DONG Jun-yan, GAO Mang-lai,CHEN Rui, LI Jin-jin. Flocculatility and Mechanism of MDFFA Composite System[J]. Journal of Petrochemical Universities, 2009, 22(3): 60-65.

董俊艳,高芒来,陈 瑞,李进进. MDFFA复配体系的絮凝性能及机理初探[J]. 石油化工高等学校学报, 2009, 22(3): 60-65.

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