Chemical Process
The only commercial Fischer-Tropsch plant for producing liquid hydrocarbon fuel from coal is located at

SASOL (in South Africa)
Trombay (India)
Redcar (U.K.)
Los-Angles (U.S.A.)

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

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

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