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 (WFEs), or packed columns. However, WFEs are single stage devices with limited mass transfer capability, requiring multiple passes; whereas, packed columns offer excellent mass transfer, but can not handle the viscosity.

Use Artisan's unique falling film disc and tube Evaporator/Stripper^TM, 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 tempeature, resulting in higher product yield and quality at reduced capital and operating cost.

• Steam strip hexane from vegetable oil containing lecithin - from 80% to 2 PPM without product degradation.
• Remove methyl ester from crude coconut oil - from 50% to less than 1%.
• Dehydrate crude vanillin from 20% to less than 50 PPM.
• Remove hexane from marigold oleoresin - from 10% to 25 PPM.
• Strip cholesterol from butter fat and lard to less than 100 PPM.

Learn more about the Artisan Evaporator/Stripper^TM or fill out an information request form if you would like an Evaporator/Stripper^TM brochure or a Process Solutions Handbook on food, ingredients, edible oils, and nutraceuticals applications.