Study of the composition of oil and fat waste - soapstock obtained by a combined method of cottonseed oil refination

The article considers the characteristics of the composition of soap stock and wash water obtained during the purification of cottonseed oil in a miscella using a combined method. Soap stock contains soap, oil, phosphorus compounds, dyes, mineral and mechanical additives, etc., and has a solution in water. To separate free fatty acids from soap stock, it is treated with mineral acids or alkalis (to saponify neutral oil), followed by distillation. Comparative indicators of the lipid composition, neutral oil, and color of soap stock obtained by traditional (control) and mixed methods, as well as indicators of multiple washing of refined cottonseed oil in a miscella are presented. It was found that due to hydrogen bonds of polarized substances in a cotton micelle, their molecular structures are formed, that reducing the intensity of cottonseed oil hydration and alkaline neutralization processes in the micelle.