The stream of hydrogen blown through the hot oil converts the linoleic acid to oleic and then the oleic into stearic.
linoleic acid lin·o·le·ic acid (lĭn'ə-lē'ĭk)
An unsaturated fatty acid considered essential to the human diet.
An unsaturated fatty acid that has two double bonds and is a nutrient essential for prostaglandin production in the human body. It is an important component of many vegetable oils, such as linseed, soybean, peanut, corn, and safflower oil, and is also found in meat and dairy products. Chemical formula: C18H32O2.