MDFFA复配体系的絮凝性能及机理初探  

Flocculatility and Mechanism of MDFFA Composite System

作　　者：董俊艳[1] 高芒来[1] 陈瑞[1] 李进进[1] 

机构地区：[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

出　　处：《石油化工高等学校学报》2009年第3期60-65,70,共7页Journal of Petrochemical Universities

基　　金：北京市教委共建计划项目(XK114140479)

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。The floeculability 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 floceulability. 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.

关 键 词：MDFFA 絮凝性 复配体系 ZETA电位 

分 类 号：TQ357.46[化学工程] O647.9[理学—物理化学]