纳米蒙脱土复合降凝剂的制备及性能评价  

Preparation and performance evaluation of nano montmorillonite composite pour point depressant

作　　者：罗晓雯 郑和平 邹永鑫 唐建华[1] LUO Xiaowen;ZHENG Heping;ZOU Yongxin;TANG Jianhua(College of Chemical Engineering,Sichuan University,Chengdu 610065,Sichuan,China;Sichuan Coal Industry Group Co.,Ltd.,Chengdu 610091,Sichuan,China)

机构地区：[1]四川大学化学工程学院,四川成都610065 [2]四川煤炭产业集团有限责任公司,四川成都610091

出　　处：《精细化工》2022年第11期2364-2370,共7页Fine Chemicals

基　　金：国家自然科学基金(22178236,21878194);四川省科技计划项目(2017FZ0076)。

摘　　要：以丙烯酸十八酯、马来酸酐、苯乙烯为原料,偶氮二异丁腈为引发剂,通过自由基聚合反应制备了一种传统共聚物降凝剂(PSMS);为提升PSMS降凝效果及稳定性,选用十六烷基三甲基溴化铵改性后的蒙脱土(OMMT)与共聚物PSMS进行插层复合制备纳米复合降凝剂PSMS/OMMT,将其应用于克拉玛依原油进行效果评价,并借助偏光显微镜(POM)和其他测试初步阐明了降凝机理。结果表明,使用原油质量0.1%的PSMS/OMMT[其中OMMT加入量为10%(以PSMS质量为基准,下同)]可使原油凝点降幅达25℃,降黏率达65.7%(20℃下);与PSMS相比,使用量减少1/3、凝点降低3℃、降黏率提升约10%(20℃下),并且抗老化性能也得到大幅提升。A traditional copolymer pour point depressant PSMS was prepared by radical polymerization of stearyl acrylate,maleic anhydride and styrene monomers with azobisisobutyronitrile as initiator,which was further intercalated with montmorillonite modified by cetyltrimethyl ammonium bromide(OMMT)to synthesize nanocomposite pour point depressant PSMS/OMMT to improve the pour point depressant effect and stability.The nanocomposite pour point depressant PSMS/OMMT was then applied to Karamay crude oil for effect evaluation,and the pour point depressurization mechanism was preliminarily elucidated via polarizing microscope(POM)and other tests.The results showed that PSMS/OMMT,at dosage of 0.1%of crude oil with OMMT additive amount(based on the mass of PSMS,the same below)of 10%,could reduce the pour point of crude oil by 25℃,and viscosity by 65.7%at 20℃.In comparison to PSMS control,for PSMS/OMMT,the dosage used was reduced by 1/3,the pour point decreased by 3℃,the viscosity reduction rate was increased by about 10%at 20℃,and the anti-aging performance was greatly improved.

关 键 词：原油降凝剂 纳米材料 插层复合 蒙脱土 性能评价 油田化学品 

分 类 号：TE869[石油与天然气工程—油气储运工程]