GB816344A - Compositions including mixed triglycerides - Google Patents

Abstract

The invention comprises a glyceride oil composition comprising one or more mixed triglycerides containing per triglyceride molecule two acid radicals from (a) acetic, propionic, butyric or caproic acid, and one acid radical from either (b) a fatty acid containing 8-24 carbon atoms derived from an animal fat, a marine oil, a vegetable oil of the oleic-linoleic or linolenic acid group or hydrogenated products thereof, such fats and oils or hydrogenation products having an iodine value above 55, or (c) a fatty acid derived from a vegetable oil of the lauric acid group or a hydrogenated product thereof, the composition being substantially free from triglycerides wholly of the acids listed at (a), which may be prepared by interesterifying the appropriate fat or oil, preferably cottonseed, peanut or coconut oil, with triacetin, tripropionin, tributyrin, tricaproin or mixtures thereof, or with similar mixed lower triglycerides, in the presence of a catalyst such as sodium methoxide, either by itself, or suspended in xylene, sodium-potassium alloy, sodium metal or one of the catalysts described in U.S.A. Specification 2,614,937, and then separating the desired mixed glycerides from the reaction product. In a preferred method, when interesterification is complete the catalyst is inactivated by acidulation or by addition of water and all unreacted lower triglyceride is thereafter removed by steam distillation at reduced pressure while passing a stream of inert gas such as nitrogen or, preferably, steam through the mixture. Following this, the pressure is reduced and the temperature raised until the required triglyceride fraction containing two lower fatty acid radicals in the molecule distils. If desired, the interesterified product may be hydrogenated before or after separation of the required fraction, and the required fraction may alternatively be separated by fractional crystallization instead of by distillation. Specified higher fatty acids include caprylic, lauric, myristic, stearic, behenic and lignoceric acids and numerous suitable oils are mentioned. Examples are given employing triacetin or tributyrin and coconut oil, cottonseed oil or soya bean oil. Specifications 160,840, [Class 2 (iii)], and 816,343 also are referred to.ALSO:A glyceride oil composition, suitable for use as a mayonnaise by incorporating vinegar, salt, and whole eggs or egg yolks, comprises one or more mixed triglycerides containing per p triglyceride molecule two acid radicals from (a) acetic, propionic, butyric or caproic acid, and one acid radical from either (b) a fatty acid containing 8-24 carbon atoms derived from an animal fat, a marine oil, a vegetable oil of the oleic-linoleic or linolenic acid group or hydrogenated products thereof, such fats and oils or hydrogenation products having an iodine value above 55, or (c) a fatty acid derived from a vegetable oil of the lauric acid group or a hydrogenated product thereof, the composition being substantially free from triglycerides wholly of the acids listed at (a). The fatty acid radicals (b) and (c) are preferably derived from cottonseed, peanut, or coconut oil Antioxidants such as the tocopherols, butylated hydroxyanisole and propyl gallate, and crystallization inhibitors, such as lecithin and oxidized ("blown") oils, may be added to the compositions. Specifications 160,840, [Class 84], 816,343 and U.S.A. 2,614,937 are referred to.