双子咪唑啉衍生物防锈剂的合成及性能评价

SYNTHESIS AND PERFORMANCE EVALUATION OF ANTI-RUST ADDITIVE GEMINI IMIDAZOLINE DERIVATIVES

以油酸、三乙烯四胺为原料,制备了双子咪唑啉衍生物防锈剂,利用响应面法优化合成条件;通过液相锈蚀试验(合成海水)、湿热试验、抗乳化试验、油泥和腐蚀趋势试验考察合成防锈剂的性能。优化的合成条件为:三乙烯四胺与油酸摩尔比0.63、反应温度248℃、反应时间7.9 h。在最优工艺下制备的双子咪唑啉衍生物的产率为90%。双子咪唑啉衍生物能显著提高APIⅠ类润滑油基础油的防锈性能,而对APIⅡ类及Ⅲ类基础油的感受性较差;在APIⅠ类基础油中,双子咪唑啉衍生物的防锈性能与T705A相当,优于T746,T703,RHY702等防锈剂。将双子咪唑啉衍生物用于汽轮机油配方中,可得到不同黏度级别、性能均满足Q/SY RH2087-2012标准要求的汽轮机油。

A gemini imidazoline derivative anti-rust additive was prepared from oil acid and triethylenetetramine, and the synthesis conditions were optimized by response surface method. The performance of synthetic anti-rust additive was investigated by liquid corrosion test(synthetic seawater),hygrothermal test, emulsion resistance test, sludge test and corrosion tendency test. The optimum synthesis conditions were as follows: a molar ratio of triethylenetetramine to oil acid of 0.63,a reaction temperature of 248 ℃,and a reaction time of 7.9 h. The yield of gemini imidazoline derivative was 90%. The results of performance evaluation showed that gemini imidazoline derivatives could significantly improve the anti-rust performance of API Ⅰ lube base oil, but had poor sensitivity to API Ⅱ and API Ⅲ base oil. In API Ⅰ base oil, the antirust performance of gemini imidazoline derivatives was equivalent to T705 A and better than T746,T703,RHY702 and other rust inhibitors. When gemini imidazoline derivatives were used in the formulation of steam turbine oil, the steam turbine oil with different viscosity grades and properties meeting the quality requirements of Q/SY RH2087-2012 standard could be obtained.