优选降凝剂增产柴油

目前对于无脱蜡、加氢精制条件的小型炼油厂,采取添加柴油降凝剂的方法,对增加柴油收率、提高柴汽比和柴油产量具有重要意义。为了有效解决柴油冷滤点不达标这一问题,通过考察,筛选出3种柴油降凝剂进行放大试验,最终优选出D001型降凝剂进行工业试生产并正式投用于生产。生产实践表明,D001型降凝剂降低柴油凝固点效果显著;在加剂量为120μg/g时,冷滤点下降明显;根据生产实际需要,加剂量在80～100μg/g时即可满足生产要求;通过添加降凝剂和优化柴油生产方案,使柴油收率增加0.2%,每年增加经济效益约200万元。建议应更加严格地控制馏出口产品质量,并尽快建立柴油组分中正构烷烃及其他烃类含量和分布的关系模型。

Using Selected Pour-point Depressant to Raise Yield of Diesel Fuel

For a small refinery without dewaxing or hydrorefining capacities,adding pour-point depressants is an important method to increase the yield of diesel fuel,the ratio of diesel-gasoline and the production of diesel fuel.To resolve the problem of unsatisfied cold filter plugging point of diesel fuel ,technicians selected three diesel pour-point depressants for scale-up experiments and later selected D001 pour-point depressant for pilot industrial production.The product was eventually used in actual production.Application results show that D001 can significantly reduce diesel fuel＇s pour point.When 120μg/g of D001 was used,the cold filter plugging point dropped significantly.In accordance with specific production needs ,80 -100μg/g of D001 will just suffice.As a result of the addition of pour-point depressants and the optimization of diesel fuel production schemes,the yield of diesel fuel can rise by 0.2% and annual returns on these measures could reach some two million yuan.It is recommended that the quality of the products at the distillation outlet should be controlled strictly and that a model should be established for the relationship between the contents and the distribution of normal alkanes and other hydrocarbon components of the diesel fuel.