Molecular Sieve for Ethanol

Absolute alcohol is an important product required by industry.  As per IS Specification it is nearly 100% pure / water free alcohol.  Alcohol as manufactured is rectified spirit, which is 95% alcohol, and rest is water.  It is not possible to remove remaining water from rectified spirit by straight distillation as ethyl alcohol forms a constant boiling mixture with water at this concentration and is known as azeotrope. Therefore, special process for removal of water is required for manufacture of absolute alcohol. In order to extract water from alcohol it is necessary to use some dehydrate, which is capable of separating, water from alcohol. This process is used for small-scale production of absolute alcohol by batch process.