几种新型柴油蜡晶分散助剂的研究

为了扩大低温流动改进剂(CFI．Cold flow improvers)T-1804在柴油中的使用范围，针对T-1804用于高蜡柴油后出现的蜡晶分散性差的特点，设计合成了3类蜡晶分散助剂并分别与T-1804复合使用。结果表明，具有稠环芳烃结构的分散助剂与T-1804复合使用，无论是对低蜡或是高蜡柴油均产生了显著的助降冷滤点效果；分散助剂中烃基链段长度、极性基与非极性基的比例均对其助降冷滤点效果有影响。

STUDY ON SOME NOVEL TYPES OF WAX CRYSTAL DISPERSER FOR DIESEL OILS

Three types of dispersants for dispersing wax crystallites in diesel oils were designed and synthesized to expand the application of cold flow improver T-1804 for high wax containing diesel oils. Experimental results showed that dispersants containing structure of fused aromatics compounding with T-1804 performed more effective than T-1804 only when used for diesel oils with either low-wax or high-wax contents for lowing the cold filter plugging point (CFPP). Moreover, all the alkyl chain length and the ratio of polar group and to non-polar group in dispersant affect the ability of dispersants for lowering the CFPP.