Degree Type


Date of Award


Degree Name

Master of Science


Chemical and Biological Engineering


Chemical Engineering

First Advisor

Brent H. Shanks


The production of vegetable oil, specifically soybean oil, in the U.S. and globally is continuously increasing. Soybean oil finds applications in a wide variety of industries and products which substantiate its ever growing demand. From harvest at the field to end application, soybean oils are subjected to a wide variety of processing methods designed to refine and concentrate the triglyceride fraction. Some of these processing methods target the removal of undesired free fatty acids, phospholipids, and other lipids. Such processes inevitably result in oil loss. Therefore, these by-products contain, what can be considered, waste oils and are therefore of low-value in their raw state. Further processing of these by-products can result in reclaimed value if the recovery of the oils is efficient, predictable, and cost-effective. Treatment of degummed and gummed soapstocks studying the factor effects of elevated temperature, pressure, shear rate, residence time, acid addition, and base addition on oil recovery has been performed. Results of the factor study indicate temperature has a major influence on both types of by-products. There is also an influence from the temperature-mixing time interaction on the gummed soapstock studied. In all cases the temperature effect conclusively influenced the oil yield, increasing recovery over what may be considered traditional process conditions.

Copyright Owner

Hugh T. Warren



File Format


File Size

165 pages