Why use benzene as dehydrating agent?

Because benzene and water will boil, they are steamed out together with water, and then put in a separator to stand and separate layers, so as to achieve the purpose of boiling and dehydration! * * * Boiling dehydration, it is best not to use benzene, which is too toxic and carcinogenic; Toluene is much less toxic. If ester compounds do not decompose or participate in the reaction, such as ethyl acetate and butyl acetate, they also have good boiling dehydration effect!