CID A-A-59938A描述了执行ASTM-D86试验（常压下石油产品蒸馏）的石油蒸馏试验装置。石油蒸馏试验装置用于测定燃料？它有蒸发的倾向。蒸馏是一种根据沸腾液体混合物中成分的挥发性差异分离混合物的方法。蒸馏是一种单元操作，或物理分离过程，而不是化学反应。

CID A-A-59938A, describes a Petroleum Distillation Test Apparatus that performs ASTM-D86 testing (Distillation of Petroleum Products at Atmospheric Pressure). The petroleum distillation test apparatus is used to determine a fuel?s tendency to vaporize. Distillation is a method of separating mixtures based on differences in volatility of components in a boiling liquid mixture. Distillation is a unit operation, or a physical separation process, and not a chemical reaction.