Purification of triacylglyceride oils by auxiliary washing
AssigneeSociete des Produits Nestle S.A.
InventorsKornel Nagy, Karine Meisser Redeuil, Marine Nicolas, Xanthippi Theurillat
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Abstract
The present invention provides an improved method for purification of a primary triacylglyceride oil comprising the steps of washing the primary triacylglyceride oil, trapping assisted removal of chlorinated precursors of MCPDEs by admixing the primary triacylglyceride oil with an auxiliary trapping agent; crystallising the auxiliary trapping agent or the primary triacylglyceride oil; and separating solid and liquid phases of the product.
Claims28
A method for purification of a primary triacylglyceride oil wherein a quantity of organic chlorinated precursors of monochloropropandiol esters (MCPDEs) is reduced in a purified primary triacylglyceride oil compared to the starting primary triacylglyceride oil, the method comprising:
- (a) admixing a ratio of 1:1 w/w of the primary triacylglyceride oil and an auxiliary oil to form a mixture, wherein
- the melting temperatures of the auxiliary oil and the primary triacylglyceride oil are substantially different;
- (ii) the auxiliary oil is soluble in the primary triacylglyceride oil;
- and
- (iii) the auxiliary oil is substantially free of hydrolytic decomposition products of triacylglycerides that have similar or lower melting temperatures than the melting temperature of the primary triacylglyceride oil, or the auxiliary oil is substantially free of polar lipids that have similar or lower melting temperatures than the melting temperature of the auxiliary oil;
- (b) heating the mixture to 90° C.;
- (c) crystallizing either
- (1) the primary triacylglyceride oil by cooling the mixture of step (b) below the melting temperature of the primary triacylglyceride oil but above the melting temperature of the auxiliary oil to form a product, wherein the auxiliary oil has a lower melting temperature than that of the primary triacylglyceride oil due to its higher degree of unsaturation or due to its shorter fatty acid chains in its constituents, or
- (2) the auxiliary oil by cooling the mixture of step (b) below the melting temperature of the auxiliary oil but above the melting temperature of the primary triacylglyceride oil to form the product, wherein the auxiliary oil has a higher melting temperature than that of the primary triacylglyceride oil due to its lower degree of unsaturation or due to its longer fatty acid chains in its constituents;
- and
- (d) separating solid and liquid phases of the product of step (c) to obtain the purified primary triacylglyceride oil.
Dependencies are inferred from the claim text.