Mono stearine

Azeotropic water entrainment. A mixture of glycerol, acetone, chloroform, and some p-toluenesulfonic acid refluxed 1-2 hrs. with separation of the water formed, stearic acid added to excess acetal, refluxing continued ca. 3 hrs., the resulting isopropylideneglycerol stearate dissolved in 2-methoxyethanol, and heated 30-40 min. with finely powdered boric acid on a steam bath -> a-mono-stearin. Y ca. 85% purity 98-99%.—This method is suitable for the prepn. of a-monoglycerides of satd. acids from Gg-acids onwards. L. Hartman, Ghem. Ind. 1960, 711. 

Majority of fatty acids exist in the form of glycerol ester and these constitute a major esterified to glycerol fraction of fats of oils. As an example, in palm oil, the natural mixture of fatty acids is separated into two fractions, namely olein, which contains the lowest possible amount of saturated fatty acids, and stearin, which contains the lowest possible amount of unsaturated fatty acids. Independent of the process of separation employed, the starting mixture of fatty acids or feed stock should meet certain specifications. A high-quality product with undamaged fatty acids (e.g., less oxidation, minimum isomerization) and fatty acids in the form of mono-, di-, or triacylglycerols, or salts of fatty acids with minimum amount of impurities is necessary for the feed stock (1). 

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