a special 3 angstrom molecular sieves dehydration process needs to be carried out using latest technology to manufacture the absolute alcohol. In the case of ethanol, water is extracted by making it dehydrated with the help of adsorbent structure of molecular sieve 3A. The potassium-based molecular sieve pore size of 3a is 3A0 or 3 Angstrom, it cannot adsorb all molecules which having the pore size is large then 3A. 3A molecular sieve can be available in beads, pellets and powder form.