CBC-SO爪形低温流动性改进剂的合成与表征

Synthesis and Characterization of CBC-SO Claw Molecule as DFI

以1,3-丁二醇、柠檬酸为原料,甲苯为溶剂,在120℃油浴中搅拌反应,当达到理论出水量的95%以上时,合成了柠檬酸-1,3-丁二醇柠檬酸（CBC）爪状物小分子,收率为73.3%。CBC进一步与硬脂酸、十八醇分别在140℃和180℃接枝,合成了多元酯类爪形大分子柠檬酸-1,3-丁二醇柠檬酸硬脂酸十八醇（CBC-SO）,收率72.4%。用核磁共振波谱及红外光谱对合成的两种化合物进行了结构表征,确定CBC和CBC-SO均为爪形结构,与所设计的分子结构吻合。元素分析确定了CBC和CBC-SO的化学组成依次为C16H22O14和C106H200O15。在实验室评价和10 t柴油工业应用放大实验中,将CBC-SO按600-1 000μg/g添加到不同的轻柴油中,柴油的冷滤点可降低4-6℃。

Citric acid-β-butylene glycol-citric acid （CBC） claw molecule was synthesized byβ-butylene glycol and citric acid in toluene,and the reaction was carried out in an oil bath at 120 ℃. The obtained CBC reacted further with stearie acid at 140 ℃ and then reacted with octadeeyl alcohol at 180 ℃. Finally,citric aeid-β-butylene glycol-citric acid-stearic aeid-oetadecyl alcohol （CBC-SO） claw largemolecule was synthsised successfully with yield of 72.4%. The structures and compositions of CBC and CBC-SO were further confirmed by ^1HNMR and elementary analysis. The molecular formula of CBC and CBC-SO were C16 H22 O14 and C106 H200 O15 respectively. CBC-SO was used as low-temperature flow improver of diesel oil. When the content of CBC-SO was about 600 - 1 000 μg/g in the laboratory and industrial scaling-up, the cold filter plugging point of the light diesel oil can be lowered by 4 -6 ℃.