Abstract: The present disclosure relates to a process for manufacturing polyethylene. In the process, the purified liquid medium obtained from the wax-distilling process is further fed to a distillation column to obtain wet hexane comprising hexane fraction and moisture from the top of the column and heavies from the bottom of the column. The so obtained wet hexane is then treated in an adsorption unit to obtain dry hexane, which can be back-fed into the polymerization process. The process yields hexane with reduction in the concentration of the heavies, leading to reduction in the fouling of reactors and other equipments, thereby reducing the downtime of the reactors. The present disclosure also discloses an apparatus for manufacturing polyethylene. The apparatus has a simple and economic design and can be retrofitted in the existing plants.