离子液体用作除硫酸钡垢剂的探讨  

Research on Ionic Liquid as Scale Remover of Barium Sulphate

作　　者：汪庐山[1] 由庆[1] 赵福麟[1] 王业飞[1] 穆丽娜[1] 贾艳平[1] 

机构地区：[1]中国石油大学石油工程学院,东营257061

出　　处：《应用化学》2008年第5期601-604,共4页Chinese Journal of Applied Chemistry

摘　　要：通过用不同性质的离子液体（1L）除硫酸钡垢，考察了离子液体的离子类型、温度、垢尺寸对除硫酸钡垢效果的影响。结果表明，离子液体（CH2CH3）3NHAl2Cl2具有较好溶解硫酸钡的能力，且溶解速率相对较快；随着温度的升高，垢尺寸的减小，除硫酸钡垢效果明显提高（温度由60℃升高至70℃，垢尺寸由600～1000μm减小至100～200μm，420min时1L（CH2CH2）2NHAl2Cl7的除垢率由5．00％增大到31．6％）。离子液体中的阳离子和阴离子类型对除垢效果亦有很大影响，极性大的亲水性离子液体（CH2CH3）3NHAl2Cl7除硫酸钡垢效果远远大于非极性大的疏水性离子液体[BMIM]PF6（同一条件下，（CH2CH3）3NHAl2Cl7的除垢率为22．45％，而[BMIM]PF6仅为0．47％）；同时，离子液体（CH2CH3）3NHAl2Cl7除碳酸钙垢效果也比较明显，而除硫酸钙垢效果较差。The effects of ion types, temperature and scale size on the barium sulfate scale elimination were investigated by means of applying ionic liquids with different properties to descale barium sulfate scale. The results show that the ionic liquid （CH2CH3 ）3 NHAl2Cl7 has a better dissolvability and a higher dissolving rate for the barium sulfate scale, which is enhanced greatly with the increase in the temperature and the decrease in the scale size（ when the temperature increases from 60 ℃ to 70 ℃ and the size of the scale decreases from 600 ～ 1 000 μm to 100～ 200 μm, then the descaling rate increases from 5.00% to 31.6% ）. The types of cation and anion in the ionic liquid affect the scale elimination greatly. The dissolving effect of hydrophilic ionic liquid （CH2CH3 ）3NHAl2Cl7 with higher nonpolarity is much greater than that of the hydrophobic ionic liquid [ BMIM ] PF6 with higher polarity（ under the same condition, the descaling rate of （ CH/CH3 ） 3NHAl2Cl7 is 22. 45 %, but the descaling rate of [ BMIM ] PF6 is only 0. 47% ）. Meanwhile the descaling effect of ionic liquid （CH2 CH3 ）3 NHAl2 Cl7 for barium sulfate scale is more obvious than that for the calcium carbonate scale.

关 键 词：离子液体 除垢剂 硫酸钡 除垢率 

分 类 号：O621.2[理学—有机化学]