Chu Yan-Ping, Gong Yong, Tan Xiao-Li, Zhang Lu, Zhao Sui, An Jing-Yi, Yu Jia-Yong
Technical Institute of Physics and Chemistry, The Chinese Academy of Sciences, Beijing 100101, People's Republic of China.
J Colloid Interface Sci. 2004 Aug 1;276(1):182-7. doi: 10.1016/j.jcis.2004.03.007.
Alkylnaphthalene sulfonates with high purity were selected as model components to research synergism for lowering interfacial tension (IFT) in surfactant/alkali/acidic oil systems. The dynamic IFTs between alkylnaphthalene sulfonates with different alkyl chain length and n-decane, oleic acid model oil, or Shengli crude oil were measured. The results showed that the alkylnaphthalene sulfonates with different alkyl chain lengths had different synergism with different acidic components and their ionized acids under the same conditions. The synergism for lowering dynamic IFT in alkylnaphthalene sulfonate/alkali/acidic oil systems was controlled by alkylnaphthalene sulfonate concentration, alkyl chain length, alkali concentration, alkali type, and oleic acid concentration: optimal physicochemical conditions were necessary to the best synergism. This indicates that the synergism among added surfactant acidic components in crude oil and their ionized acids is controlled by the ratio of their interfacial concentrations.
选择高纯度的烷基萘磺酸盐作为模型组分，研究其在表面活性剂/碱/酸性油体系中降低界面张力（IFT）的协同作用。测定了不同烷基链长度的烷基萘磺酸盐与正癸烷、油酸模型油或胜利原油之间的动态界面张力。结果表明，在相同条件下，不同烷基链长度的烷基萘磺酸盐与不同酸性组分及其电离酸具有不同的协同作用。烷基萘磺酸盐/碱/酸性油体系中降低动态界面张力的协同作用受烷基萘磺酸盐浓度、烷基链长度、碱浓度、碱类型和油酸浓度的控制：最佳的协同作用需要最佳的物理化学条件。这表明原油中添加的表面活性剂酸性组分与其电离酸之间的协同作用受其界面浓度比的控制。
