Purification and deodorization of structured lipids by short path distillation

Abstract

Purification and deodorization of structured lipids by short path distillationPurification of structured lipids (SL), produced from lipase-catalyzed acidolysis of rapeseed oil and capric acid, and deodorization of randomized SL, produced from chemical randomization of fish oil and tricaprin, were studied in a bench-scale short path distillation (SPD). SL obtained from enzymatic acidolysis usually contain a large proportion of medium-chain and long-chain free fatty acids. Two SPD steps have been applied for the removal of free fatty acids. Parameters such as evaporator temperature, feeding flow rate, stirring roller speed, and the content of free fatty acids (FFA) added to the starting materials were optimized with respect to FFA left in the product residuals and to tocopherol loss from the starting oil. Evaporator temperature and flow rate were optimized using response surface methodology and two models were obtained for the FFA content left and loss of tocopherols. An applicable parameter zone was created to obtain a certain FFA (0.5% for example) content.In general, conditions that result in a lower FFA content will lead to a higher loss of tocopherols. In most parts of the parameter zone, 50% loss of tocopherols will be expected. The deodorization study of randomized SL from fish oils and tricaprin indicated that SPD in comparison with batch deodorization gave a product of a poorer sensoric quality. † Fatty acid composition after short path distillation to remove free fatty acids. The data in parenthesis is the fatty acid composition of acylglycerols before short path distillation (after reaction). ‡ After chemical randomization and before deodorization.

A versatile apparatus for the bench scale bleaching and deodorsation of vegetable oils

“…Carbonyl off-flavour compounds are usually accompanied by free fatty acids, squalene, tocopherols and phytosterols, which are ordered according to the relative vapour pressure. Thus, deodorisation condensate is a rich source of valuable sterols and vitamin E derivatives (Čmolík & Pokorný 2000;Xu et al 2002). Isomerisation, oligomerisation, and numerous side reactions can occur during deodorisation.…”

Human Milk Fat Substitute from Butterfat: Production by Enzymatic Interesterification and Evaluation of Oxidative Stability

“…The separation of the free fatty acids remaining after the reaction was conducted with short path distillation (KD6, UIC, Alzenau-Hoerstein, Germany) using a procedure described previously [11]. The distillation was conducted in two steps.…”

“…The absence of tocopherols in the HMFS oils indicated that tocopherols were lost during the purification (pilot batch deodorization plus short path distillation) process of the enzyme modified oil. Previous studies had shown that substantial amounts of tocopherols are lost during purification of enzyme modified lipids if short path distillation is used as the purification method [4,11]. However, one of these studies showed that when batch deodorization was used the loss of tocopherol was much lower [11].…”

“…Previous studies had shown that substantial amounts of tocopherols are lost during purification of enzyme modified lipids if short path distillation is used as the purification method [4,11]. However, one of these studies showed that when batch deodorization was used the loss of tocopherol was much lower [11]. The complete loss of tocopherol during production and purification of the HMFS oil is therefore somewhat surprising and may suggest that tocopherols had been partly lost during the enzyme modification or fractionation steps and was further removed during the two purification steps.…”

Process Optimization of Enzyme Catalyzed Production of Dietary Diacylglycerol (DAG) Using TLIM as Biocatalyst

“…Unreacted glycerol was separated by centrifugation and water washing. The residual oil was vacuum dried and FFA was removed by deodorization followed by short path distillation to produce 90 DAG 33 . Values are mean ± SD, n=3…”