Deodorizing and Desolventize Edible Oils And Oleochemicals

Problem: Desolventizing and stripping organic solvents to very low (50 PPM or less) residual levels from concentrated vegetable oils containing emulsifying agents, such as lecithin. Typically, these separations are carried out in wiped film evaporators (WFE’s), or packed columns. However, WFE’s are single stage devices with limited mass transfer capability, requiring multiple passes; whereas, packed columns offer excellent mass transfer, but can not handle the

Solution: Use Artisan’s unique falling film disc and tube Evaporator/Stripper™, preceded by a rising film evaporator to remove the bulk of the solvent and strip the oil to low PPM residual level by using either stripping steam, nitrogen, or both depending on the desired moisture content of the final product. Stripping is carried out at moderate vacuum and relatively low temperature, resulting in higher product yield and quality at reduced capital and operating cost. The Evaporator/Stripper offers the following advantages: