What are acid oils?
The Acid oils or Fatty Acids or Oleins are a byproduct of the process of glycerol and have a wide range of technical uses.
Any soaps that might be present in the crude glycerol are cleaved by the action of hydrochloric acid and finally is produced a mixture of free fatty acids.
The color of the product is very dark brown and it is an oily texture liquid.
It should be noted that the product produced during the production of biodiesel and although it contains free fatty acids it has different composition from Acid Oils, produced by refineries. The main difference is that the final product contains fatty acid methyl esters (biodiesel) and also a small amount of methanol.