Most of the industries require 100% water-free Ethanol. The finally manufactured alcohol is a rectified spirit with almost 94.6% alcohol and the remaining percentage is water. It is very difficult to remove the amount of water in alcohol using any straightforward and simple distillation process. Therefore, a special 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.
The powder desiccants have the power to effectively adsorb the molecules on the basis of their size and polarity. They are used for removing moisture from polyurethane polymer systems. It also works as a carrier to discharge the catalysts into certain systems. Unlike other hazardous acid catalysts, zeolites are regenerable, non-hazardous and non-corrosive as well. These properties make it a valuable desiccant for various applications. 3A and 4A molecular sieve powder can be used for EPOXY paints resins, metallic pigments/ZINC paints, etc.