含氟油酸咪唑啉的合成及其缓蚀性能

Synthesis and Performance of Oleic Imidazoline Fluoride Corrosion Inhibitor

以油酸与二乙烯三胺为原料,二甲苯为携水剂,油酸与二乙烯三胺摩尔比为1∶1.2,制备得到了油酸咪唑啉(OAC),再以全氟辛基磺酰氟为氟化剂,三乙胺为缚酸剂,反应温度50～55℃,反应时间4～6h,得到橙棕色含氟油酸咪唑啉缓蚀剂(FOAC),产率93%。利用红外光谱对目标产物的结构进行分析,并用静态腐蚀法研究了目标产物在盐酸介质中对Q235钢的缓蚀率。润湿角测定结果表明,含氟咪唑啉缓蚀剂更适用于输油管道中;热重分析结果表明,其热稳定性较好,失重最快时的温度达到319.36℃。

Oleic acid imidazoline corrosion inhibitor（OAC） was prepared by the reactton oI cnetnylc- oleic acid, while the dimethylbenzene as the water-carrier. In the raw materials the molar ratio between diethylenetriamine and oleic acid was 1 to 1.2. And then using domestic perfluoro-l-octanesulfonyl fluoride as raw material, triethylamine as deacid reagent, with the reaction temperature of 50 ~C to 55 ~C and the reaction time o~ 4 h to 6 h, an orange oleic acid imidazoline inhibitor（FOAC） containing fluorine was obtained with the productivity of 93%. The structure of the product was analyzed by infrared spectroseopy（IR）. Using weight loss method, the inhibition efficiency of the product on Q235 steel in the medium of hydrochloric acid was measured. Wetting angle determination indicated that the fluorine containing imidazoline corrosion inhibitor was more suitable for the oil pipe. And thermogravimetric analysis showed that the inhibitor had good thermal stability, most quick weight loss when the temperature reached 319.36℃.