CO_(2)响应型β-环糊精材料用于稠油降黏  

CO_(2)-responsive beta-cyclodextrin materials for heavy oil viscosity reduction

作　　者：孙彩霞 马浩 于福策 夏淑倩[1] SUN Caixia;MA Hao;YU Fuce;XIA Shuqian(School of Chemical Engineering and Technology,Tianjin University,Tianjin 300350,China)

机构地区：[1]天津大学化工学院,天津300350

出　　处：《精细化工》2024年第4期895-901,919,共8页Fine Chemicals

基　　金：国家重点研发计划项目(2018YFA0702400)。

摘　　要：制备了一种环境友好型马来酸酐改性β-环糊精(MAH-β-CD),温和条件下将其与聚醚胺(JD230)通过静电作用合成了具有CO_(2)响应性的表面活性剂(MJD230)。MJD230能与稠油形成稳定的水包油乳液,进而有效降低溶液的表面张力。在CO_(2)调控下,MJD230可重复用于稠油的乳化降黏和破乳。利用FTIR对MJD230结构进行了表征。通过观察降黏率和乳液粒径优化MJD230的合成条件,同时对降黏效果和乳液的稳定性进行了考察。将在反应温度为60℃,反应时间为60min,MAH-β-CD与JD230物质的量比为2∶1条件下制备的MJD230配成质量分数为0.5%的MJD230水溶液,其与稠油按照体积比为3∶7乳化后,稠油降黏率可达99.19%。反应体系pH和电导率的可逆变化证明了MJD230溶液对CO_(2)的响应性,这为表面活性剂驱油和CO_(2)捕集相结合提高稠油采收率提供了可行的途径。CO_(2)-responsive surfactant(MJD230)was synthesized from electrostatic interaction between environmental-friendlyβ-cyclodextrin modified by maleic anhydride(MAH-β-CD)and polyether amine(JD230)under mild conditions.MJD230 could form a stable oil-in-water emulsion with oil,thereby effectively reducing the surface tension of the solution,and could be used repeatedly for emulsification and demulsification of heavy oil under the regulation of CO_(2).The structure of MJD230 was characterized by FTIR.The synthesis conditions of MJD230 were optimized via viscosity reduction rate and emulsion particle size,followed by assessment on its viscosity reduction performance and stability.When MJD230 was prepared under the conditions of reaction temperature 60℃,reaction time 60 min,n(MAH-β-CD)∶n(JD230)=2∶1 and MJD230 aqueous solution with a mass fraction of 0.5%was emulsified with heavy oil in volume ratio of 3∶7,the viscosity reduction rate of heavy oil could reach 99.19%.The reversible changes of pH and conductivity of the reaction system proved the response of MJD230 solution to CO_(2),indicating the feasibility of a new enhanced heavy oil recovery technology combining surfactant flooding and CO_(2) capture.

关 键 词：静电作用 表面张力 CO_(2)响应型表面活性剂 稠油降黏 破乳 油田化学品 

分 类 号：TQ630[化学工程—精细化工] TE39[石油与天然气工程—油气田开发工程]