| 摘要 |
<p>PURPOSE: An extracting method of polychlorinated biphenyls groups is provided to extract PCB groups with low number of chlorine from liquid with PCB groups in 4 step process. CONSTITUTION: An extracting method of polychlorinated biphenyl groups comprises the following steps. An oily liquid is added as a silica gel layer with oil groups comprising a single layer of silica gel (13) comprised of sulfuric acid silica gel and an alumina layer (23). Aliphatic hydrocarbon solvent is supplied to the silica gel and the aliphatic hydrocarbon solvent pass through the silica gel and the alumina layer in order. The polychlorinated biphenyl groups pass through the alumina layer by using hydrophobic but soluble solvent. The hydrophobic but soluble solvent is obtained. When the first and the second processes are carried out, the temperature of the silica gel is below 35°C.</p> |
