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

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

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

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

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