We are washing crude Dinitro toluene by 4% sodium hydroxide solution. In this process nitro cresols and nitro phenols will extracted in to aqueous solution. In order to recycle the water, we want to remove above compounds from aqueous solution.
I agree with Valentine Mbatchou
Just distill in a rotary evaporator.
Refluxing at reduced pressure and temperature using a rota evaporator could separate the nitro cresols and phenols from water
To get pure acetylene black
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