Chemical Process
Tall oil obtained as a by-product from the black liquor recovery is

A black, sticky & viscous liquid
Composed mainly of rosin & fatty acids
All of these
Used in the manufacture of greases, emulsions & soaps

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Chemical Process
Oils are partially hydrogenated (not fully) to manufacture vanaspati, because fully saturated solidified oils

Are prone to rancid oxidation
Have affinity to retain harmful sulphur compounds
Cause cholesterol build up and blood clotting
Always contain some amount of nickel (as their complete removal is very difficult)

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