柴油蜡晶分散剂的制备和降凝效果研究

Preparation of a novel pour point depressant for diesel and its freeze-point effect

以马来酸酐和呋喃为原料,经Diels-Alder反应、酯化/酰胺化后合成了柴油蜡晶分散剂3,6-氧桥-1,2,3,6-四氢苯-1,2-二甲酸高级酯/酰胺。酸值测定表明,该合成方法的产率超过90%。对大庆0#柴油的冷滤点测试表明,该醋晶分散剂与低相对分子质量的乙烯醋酸乙烯酯共聚物复配效果较差,而与改性的聚丙烯酸高级醇酯二元复配后,可以降低冷滤点7℃,表现出了良好的协同效应。

A kind of pour point depressant （PPD） 3,6-O- 1,2,3,6-tetrahydrobenzo- 1,2 anhydride ester and/or amide was synthesized via Diels-Alder reaction using maleic anhydride and furan as reactants. The determinant of acid value shows that the rate of production exceeds 90 %. The measured cold flow plugging point of Daqing diesel indicates that the depressant belongs to paraffin-based oil having very low sensitivity to ethylene-vinyl acetate copolymer（EVA） series PPD additives. The novel additive component combined with polymethacrylate asters （PAE） can reduce the cold flow plugging point of Daqing diesel by 7 ℃ , and Shows good synergy.