【摘要】 研究煤焦油的分离,煤焦油经减压蒸馏的方法处理,得到一定量的轻质煤焦油。减压蒸馏的原理是利用物质在不同温度下的具有不同的饱和蒸汽压,采取减小压力的方法,使物质的沸点降低。减压蒸馏是分离可提纯有机化合物的常用方法之一。更多还原

【Abstract】 The separation of coal-tar was studied.The coal tar was treated by vacuum distillation,and light tar was obtained.The principle of vacuum distillation is that material has different saturated vapor pressure under different temperatures,to reduce the pressure can lower boiling point of the material.The vacuum distillation is a common method to separate and purify organic compounds.更多还原