高温下高矿化度对泡沫性能的影响

发布时间：2019-01-04 21:10

【摘要】：考察了一价阳离子Na~+和二价阳离子Ca~(2+),Mg~(2+)对非离子起泡剂烷基糖苷(WT)、两性离子起泡剂甜菜碱(YX)泡沫性能的影响,测定了WT和YX的临界胶束浓度(CMC)及YX在含Ca~(2+),Mg~(2+)溶液中的透射率,采用SEM表征了泡沫微观结构,分析了矿化度对泡沫稳定性的影响机理。表征结果显示,随矿化度增大,形成的泡沫液膜厚度和黏弹性均增加。实验结果表明,矿化度大于3×104 mg/L时,随矿化度的增大,CMC降低,泡沫液膜厚度增加,包裹在液膜上的无机盐增多,泡沫稳定性增强,表现出一定的盐增效性;Na~+主要通过改变泡沫体系的CMC和电荷作用来影响泡沫的稳定性,而Ca~(2+)与Mg~(2+)则是通过离子与离子之间的化学反应、水化作用及电荷作用共同影响泡沫的稳定性,Ca~(2+)将与YX中阴离子基团反应生成不溶物,降低泡沫的起泡性与稳定性;Mg~(2+)则对YX泡沫性能影响不大。
[Abstract]:The effects of monovalent cationic Na~, divalent cationic Ca~ (2) and Mg~ (2) on the properties of non-ionic foaming agent (WT), amphoteric foaming agent betaine (YX) were investigated. The transmissivity of (CMC) and YX in the solution containing Ca~ (2) and Mg~ (2) of WT and YX were measured. The microstructure of foam was characterized by SEM, and the mechanism of influence of salinity on foam stability was analyzed. The results showed that the thickness and viscoelasticity of the foam film increased with the increase of salinity. The experimental results show that when the salinity is greater than 3 脳 10 ~ 4 mg/L, with the increase of salinity, CMC decreases, the thickness of foam liquid film increases, the inorganic salt wrapped on the liquid film increases, and the foam stability increases, showing a certain salt synergism. Na~ affects the stability of foam mainly by changing the CMC and charge of foam system, while Ca~ (2) and Mg~ (2) affect the stability of foam by chemical reaction between ions and ions, hydration and charge action. Ca~ (2) reacts with anionic groups in YX to form insoluble compounds, which reduces foaming property and stability of foams. Mg~ (2) had little effect on the properties of YX foam.
【作者单位】：中国石油川庆钻探工程有限公司苏里格项目经理部;西南石油大学石油与天然气工程学院;
【分类号】：TE377

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