Abstract:

The preparation of n-bromobutane by the reaction of n-butanol, sodium bromide, and sulfuric acid is a basic experiment in organic chemistry. In this paper, a tail-gas-absorption reflux device was designed using these three reactants as raw materials. Any two of them were heated to reflux, and then the third was added instantaneously. The effects of different raw-material addition sequences and reflux times on the yield of n-bromobutane were investigated. This experiment can act as a practical reference for domestic universities endeavoring to set up organic chemistry laboratory courses and can also encourage students to see experimental mistakes as opportunities for innovation.

Key words: n-Bromobutane, Misoperation, Reaction time, Innovation