Abstract: In refining crude vegetable oils, there are certain economic and quality advantages to refining the oils with potassium hydroxide. Lower overall cost is achieved from reduced levels of soap and trace impurities in the oil, improved refining yield for the oils refined with potassium hydroxide, higher retention of recoverable tocopherols in the oil, gentler reaction with triglyceride, lower mono and diglyceride in the potassium hydroxide soapstock, the option to convert a by-product of soapstock acidulation, into a profitable co-product and eliminate acid-water discharge from the soapstock acidulation process.