共聚物ME-TA-MA的合成及对盘锦原油的降凝降粘作用

根据盘锦原油的性质,成功研制了以甲基丙烯酸、十四醇、马来酸酐为原料的共聚物ME-TA-MA降凝降粘剂。单因素实验确定了合适的工艺条件。酯化：n（十四醇）∶n（甲基丙烯酸）=1.25∶1,m（催化剂）：m（甲基丙烯酸＋十四醇）=2%,m（溶剂）∶m（甲基丙烯酸＋十四醇）=50%;聚合：n（马来酸酐）∶n（酯化产物）=1∶1,m（引发剂）：（甲基丙烯酸十四酯＋马来酸酐）=1.5%,m（溶剂）∶m（甲基丙烯酸十四酯＋马来酸酐）=50%,聚合温度80℃,聚合时间3h。IR结果表明,所制备产物的官能团结构与设计的目标产物相符。将最佳条件下合成的产物以m（降凝剂）∶m（原油）=0.23%的加剂量加入到盘锦原油中,凝点可降低13℃,粘度可降低61.33%。

Synthesis of ME-TA-MA and its effects on pour point depression and viscosity reduction of Panjin crude oil

Aimed at the nature of Panjin crude oil,apour point depressant and viscosity reducer-META-MA was successfully synthesized from methacrylic acid（ME）-tetradecyl alcohol（TA）-maleic anhydride（MA）.Through the single factor experiments,the optimal conditions for preparing ME-TAMA are obtained：For esterification reaction：the molar ratio of methacrylic acid to tetradecyl alcohol is 1∶1.25,with catalyst（p-toluenesulfonic acid）of 2.0% and solvent（toluene）50%;For polymerization reaction：the molar ratio of tetradecyl methyl-acrylate to maleic anhydride of 1∶1,with initiator（BPO）of 1.5% and solvent（toluene）of 50wt%,and polymerization time is 3h,polymerization temperature of 80℃.The infrared analysis showed that the molecular functional group of the prepared products matches with the designed target products（copolymer of tetradecyl methyl-acrylate and maleic anhydride）.Solidifying point can be lowered by 13℃ and viscosity lowered by 63.33% when 0.23% of the pour point depressant and viscosity reducer（ME-TA-MA）was added in the Panjin crude oil.