ETHANOL (C2H5OH) Anhydrous

Anhydrous ethanol is one of the biofuels produced today and it is a subset of renewable energy. It is considered to be an excellent alternative clean-burning fuel to gasoline. Anhydrous ethanol is commercially produced by either catalytic hydration of ethylene or fermentation of biomass. Any biological material that has sugar, starch or cellulose can be used as biomass for producing anhydrous ethanol. Since ethanol–water solution forms a minimum-boiling azeotrope of composition of 89.4 mol% ethanol and 10.6 mol% water at 78.2 °C and standard atmospheric pressure, the dilute ethanol–water solutions produced by fermentation process can be continuously rectified to give at best solutions containing 89.4 mol% ethanol at standard atmospheric pressure. Therefore, special process for removal of the remaining water is required for manufacture of anhydrous ethanol. 

Ethanol common applications:
1. Medical

  •     Antiseptic
  •     Antidote
  •     Medicinal solvent
  •     Pharmacology

2. Recreational
3. Fuel

  •     Engine fuel
  •     Rocket fuel
  •     Fuel cells
  •     Household heating

4. Feedstock
5. Solvent
6. Low-temperature liquid

No ND indicators and units of measurement Test results Relative inaccuracy of the test method %
1. Mass concentration of aldehydes, mg / dm3 anhydrous alcohol, including: 30 -
1.1 acetaldehyde 20,5 10
1.2 acetal 9,5 10
2. Mass concentration of fusel oil, mg / dm3 anhydrous alcohol, including: 1,9 -
2.1 2-propanol 0,1 -
2.2 1-propanol 0,8 10
2.3 isobutyl alcohol less then 0,5 10
2.4 1-butanol less then 0,5 -
3. Mass concentration of esters, mg / dm3 of anhydrous alcohol, including: 29,7 -
3.1 methyl acetate less then 0,5 -
3.2 ethyl acetate 27,5 10
3.3 isobutyl acetate less then 0,5 -
3.4 ethylbutyrate less then 0,5 -
3.5 isoamyl acetate 0,7 15
4. Methyl alcohol by volume, in terms of anhydrous alcohol,% 0.0002 10