We have a mixture of dichloromethane (DCM-0.8 mole%) and hexane-0.15% (hexane-1, hexane-2,hexane-3, hexane-4) mixture. Give suggestion / method to separate to get pure DCM (99%).
Dichloromethane (DCM) and hexane are immiscible liquids, meaning they don't mix with each other to form a homogeneous solution. They can be separated by using a process called liquid-liquid extraction. The steps are as follows:
Mix the DCM and hexane mixture in a separatory funnel.
Add an immiscible solvent (such as water) to the mixture to aid in the separation.
Shake the separatory funnel to allow the two liquids to mix and then separate into two distinct layers.
Drain the bottom layer (hexane) into a collection flask, leaving the top layer (DCM) in the separatory funnel.
Repeat the extraction process if necessary to obtain a pure sample of either DCM or hexane.
It is important to note that DCM is toxic and volatile, so it is important to handle it in a well-ventilated area and take appropriate safety precautions.