Use of oleic acid in the preparation of ethyl oleate and butyl oleate

[alias]cis-octadec-9-enoic acid, octadecenoic acid, red oil. ［molecular formula］c18h34o2 ［structural formula］ch3(ch2)7ch=ch(ch2)7cooh [properties]oleic acid is an unsaturated fatty acid containing one double bond. the pure product is a colorless and transparent oily liquid. when exposed to the air, the color gradually darkens to yellow or red, and gradually becomes darker and darker, with an odor like lard.…