MMVA柴油低温流动性改进剂的合成及性能评价

介绍了甲基丙烯酸酯-马来酸酐-醋酸乙烯酯-丙烯酰胺四元共聚物类柴油低温流动改进剂的合成,通过正交实验和极差分析确定了最佳合成工艺条件:单体物质的量之比为2∶1∶1∶0.5,引发剂用量0.5%,反应温度90℃,反应时间6h.在实验室考察了它的降凝助滤效果及与其他降凝剂和非离子表面活性剂的复配效果.实验表明,在长庆石化分公司混合柴油中加入0.05%的该共聚物可使其凝点下降10℃,冷滤点下降2℃.与甲基丙烯酸十八酯-马来酸酐二元共聚物和表面活性剂甲基单乙醇胺盐复配使用时,可使其冷滤点下降4℃.

Synthesis and performance evaluation of a diesel low-temperature liquidity modifier MMVA

A diesel low-temperature liquidity improver MMVA is synthesized by the copolymerization of methylacrylate,maleic anhydride,vinyl-acetic ester and acrylamide .the best synthesis technological conditions are determined through the orthogonal experiment and extreme difference analysis:the molar ratio of monomers is 2∶1∶1∶0.5,the dose of initiator is 0.5%,polymration temperature is 90 ℃,reaction time is 6 h.The effects of the quadri-polymer on the solidification point temperature and the cold filter plugging point temperature of diesel oil and its compound effects with other pour point depressants and non-ionic surfactants are examined in laboratory .The results show that the solidification point temperature and the cold filter plugging point temperature of the mixed diesel oil of Changqing Petroleum Chemical Engineering Branch Company can be decreased by 10 ℃ and 2 ℃ separately only adding this copolymer of 0.05% to the mixed diesel oil,and if the polymer is compounded with the bio-polymer of octadecyl methacrylate and maleric anhydride and surfactant methyl monoethanolamine salt,the cold filter plugging point temperature of the mixed diesel oil can be decreased by 4 ℃.