When the UNIQUAC model
was used, stream 305 contained 62% glycerol and was
fed to T-501 to obtain 85% or 92% glycerine. Glycerine
purification T-501 was designed with four theoretical
stages and a reflux ratio of 2. Water and methanol were
removed in distillate stream 501. At the bottom, 92%
glycerine was obtained as a high quality by-product