格尔木柴油降凝剂效果评价

EFFEC EVALUATION OF GOLMUD DIESEL POUR POINT DEPRESSANT

针对格尔木0#柴油蜡含量高,低温流动性差的特点,考察了7种科新公司柴油降凝剂产品对格尔木柴油的降凝效果。结果表明:选取的降凝剂降凝效果差异较大,呈现出一定的选择性,其中富马酸酯-乙酸乙烯酯共聚物类降凝剂、富马酸酯-乙酸乙烯酯-苯乙烯三元共聚物类降凝剂以及聚甲基丙烯酸酯类降凝剂效果明显,在加剂量为1000μg/g时,格尔木0#柴油凝点分别降到了-15、-18、-23℃,冷滤点降到了-8、-9、-11℃;复配型降凝剂中,分属于富马酸酯-乙酸乙烯酯共聚物类的降凝剂与聚甲基丙烯酸酯类的降凝剂之间复配协同作用最好,在加剂量为1400μg/g时,格尔木柴油的凝点、冷滤点分别降到-28、-13℃。

Aiming at the characteristics of Golmud 0#diesel oil with high wax content and poor low-temperature fluidity,7 kinds of diesel oil pour point depressant products from Kexin Company were selected,and the freezing point and cold filter plugging point were tested to explore the effect of these pour point depressants on Golmud diesel.The results show that the selected 7 kinds of pour point depressants differ greatly in their pour point depressant effects,showing a certain selectivity.Among them,the effect of fumarate-vinyl acetate copolymer,fumarate-vinyl acetate-styrene terpolymer,and the polymethacrylate pour point depressant is remarkable,the freezing point of Golmud 0#diesel oil drops to-15,-18 and-23℃,respectively,and the cold filter plugging point of Golmud 0#diesel oil drops to-8,-9 and-11℃,respectively,when the concentration of these additives is 1000μg/g.Among the composite pour point depressants,the best synergistic effect was found between fumarate vinyl acetate copolymer and polymethacrylate.When the dosage of this composite pour point depressant was 1400μg/g,the freezing point and cold filter point of Golmud diesel oil decreased to-28℃and-13℃respectively.