Separation of toluene and dibromoethane
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Has anyone who has experience with the separation of toluene and 1,2-dibromoethane? The mixture contains about 20% toluene, with the remainder being 1,2-dibromoethane. I tried distillation, but the results were not satisfactory. Thank you for your advice.
Can water-azeotropic distillation be used? Water is azeotropic with toluene; I’m not sure if it is azeotropic with dibromoethane
The boiling point of toluene is 110.6 degrees, while that of dichloroethane is 83.5 degrees. This difference in boiling points facilitates distillation-based separation. Moreover, toluene constitutes only 20% of the mixture; please investigate the reason using the distillation system.
The boiling point difference is nearly 30 degrees, so distillation separation should be possible. Have these two materials formed an azeotrope?
The two substances should not be azeotropic; by increasing the number of theoretical plates and the reflux ratio, the purity will be fine.
Dibromoethane is azeotropic with water; the addition of water results in a ternary azeotrope. Previous attempts yielded unsatisfactory results, likely due to low column efficiency
Well, I suspect the tower efficiency is not sufficient, resulting in incomplete separation
It should be an azeotrope; the efficiency of the tower may not be sufficient, resulting in suboptimal separation
When an alkaline substance is added, bromoethane can undergo hydrolysis in an alkaline solution to produce ethanol, whereas toluene is insoluble in alkaline solutions and separation occurs as a result
Have you tried azeotropic distillation or extractive distillation?
It is very likely that toluene and dibromoethane form an azeotrope, and the addition of water mentioned below may also be difficult to achieve, as water forms a minimum azeotrope with toluene; it is probable that water also forms an azeotrope with dibromoethane. Extraction distillation can be considered, as long as an appropriate extractant is found to enable the separation. We can provide technical support in this regard.