一、引言随着我国国民经济的快速发展,对能源的需求也日益增长,其中对柴油的需求十分紧迫。然而,柴油不仅在供应上不够充分,在使用方面还受到温度的限制(低温下柴油的流动性变差,柴油在冷滤点附近就无法正常使用),从而使柴油的供求矛盾更为明显。为改变柴油的低温流动性能,炼油厂往往加入不同比例的柴油降凝剂。柴油降凝剂又称柴油 I. INTRODUCTION With the rapid development of our national economy, the demand for energy is also growing. Among them, the demand for diesel oil is very urgent. However, not only is diesel insufficiently supplied, but it is also limited in temperature due to its poor fluidity (diesel oil can not be used normally near cold filter points) at low temperatures, making the contradiction between supply and demand of diesel oil more obvious. To change the low-temperature flow of diesel, refineries often add different proportions of diesel pour point depressants. Diesel pour point depressant, also known as diesel