The component acids and glycerides of neat's foot oil

✍ Scribed by Hilditch, T. P. ;Shrivastava, R. K.

• Publisher: Wiley (John Wiley & Sons)
• Year: 1948
• Weight: 480 KB
• Volume: 67
• Category: Article
• ISSN: 0368-4075
• DOI: 10.1002/jctb.5000670404

✦ Synopsis

Abstract

The component acids of a specimen of neat's foot oil consisted of myristic 0·7, palmitic 16·9, stearic 2·7, arachidic 0·1, tetra‐decenoic 1·2, hexadecenoic 9·4, oleic 64·4, octadecadienoic 2·3, octadccatrienoic 0·7, and unsaturated C~20‐22~ acids 1·6% (wt.). The component glycerides, studied after partial separation by low‐temperature crystallization from acetone, were found to include, inter alia, about 35% palmitodiolein, 23% of hexadecenodiolein, 8% of polyethenoid‐diolein, 7% of olcopalmitostearin and probably not much more than 10% of triolein, with minor amounts of other mixed glycerides. The presence of fairly substantial proportions of hexadecenoic acid in neat's foot oil had not been previously noted. The specific utility of the oil as a lubricant cannot, as at one time supposed, be connected with a high content of triolein. The present work suggests the possibility that hexadecenodiolein, which forms nearly one‐quarter of the oil, and perhaps also the di‐oleoglycerides in which the third acyl group is a polyethenoid member of the C~15~, C~20~ (or C~22~) series, may contribute specifically to its lubricant properties.