How to remove water from toluene
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If toluene contains 2% water, how can it be removed? Some people say to filter using anhydrous magnesium sulfate, while others suggest using azeotropy. Are these two methods effective? What is the principle behind them? How to operate it?
An azeotrope agent needs to be introduced, and it is also required to be capable of separation
2% moisture content – it depends on the level of dehydration you require. If the target is at or below the ppm level, then using anhydrous magnesium sulfate for filtration or azeotropic distillation will not be sufficient to meet the requirements; instead, combining anhydrous magnesium sulfate filtration or azeotropic distillation with molecular sieve dehydration can achieve the desired result. This is provided for the reference of the original poster
The solubility of water in toluene is less than 0.1%, and 2% of water can separate out as a layer； If further dehydration is required, anhydrous calcium chloride can be added for drying before distillation. Molecular sieves can be used when high precision is required
The adsorption filtration dehydration method is more energy-efficient.
He was talking about toluene, not methanol: lol