Wax obtained from the pyrolysis of polyethylene waste can contain inorganic contaminants and must be purified before application. We evaluated different filter aids (perlite, sand, and rice husk ash) for the filtration of a crude wax and a pyrolysis wax through a filter medium that was coated with nylon 6 nanofibers to improve filtration efficiency. We first examined the performance of the filter aids in improving crude wax filtration, with the filtration time, temperature, and pressure held constant at 1 h, 170 °C, and 2.5 bar, respectively. Oily wax was then produced by pyrolysis of high-density polyethylene (HDPE) waste in the temperature range 425⿿475 °C. The best filter aid was perlite, which had a filtrate production rate of 5.47 ÿ 10^⿿5 m³/h. The highest oily wax yield (87.8%) was achieved at a pyrolysis temperature of 425 °C. The assembly comprising the filter medium coated with nylon 6 nanofibers plus perlite as a filter aid was most suitable for removing impurities from the oily wax generated by the HDPE pyrolysis as it achieved a purification efficiency of 99.9%.

从聚乙烯废料热解获得的蜡中可能含有无机污染物，必须在使用前进行纯化。我们评估了不同的助滤剂（珍珠岩，沙子和稻壳灰），用于通过涂有尼龙6纳米纤维的过滤介质过滤粗蜡和热解蜡，以提高过滤效率。我们首先检查了助滤剂在改善粗蜡过滤方面的性能，过滤时间，温度和压力分别保持恒定在1  h，170  °C和2.5  bar。然后，通过在425⿿475  °C的温度范围内热解高密度聚乙烯（HDPE）废物来生产油性蜡。最好的助滤剂是珍珠岩，其中有5.47滤液生产速度 ÿ  10 ^⿿5 m ³ /小时。在425  °C的热解温度下可获得最高的油蜡收率（87.8％）。包含涂有尼龙6纳米纤维和珍珠岩作为助滤剂的过滤介质的组件最适合从HDPE热解产生的油性蜡中去除杂质，因为它实现了99.9％的净化效率。