Explain how coal tar and coke is obtained from petroleum.
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Coal tar is a thick black liquid which is a by-product of the production of coal gas and coke. It contains benzene, naphthalene, phenols, aniline, and many other organic chemicals. Coal tar is used for medical and industrial purposes. However, coal is also known as cutar, balnetar, liquor carbonis detergens, liquor picis carbonis, etc.
Uses of Coal tar
The following are the uses of coal tar :
Coal tar is used as the medication to heal itching, scaling, and flaking due skin conditions.
It is also used in making medicated shampoo to treat dandruff and to kill lice.
Soaps are made from coal tar.
Various phenolic coal tars have the properties of a painkiller.
Coal tar is used to protect and beautify the underlying pavement.
Coal is also used to make parking lot seal – coat products.
Roads are made with the use of coal tar.
Coal tar is flammable in nature. Hence, it is used for heating.
Binders used in graphite industry to make green blocks have coal tar in them.
Manufacture paints, synthetic dyes, and photographic materials contain coal tar.
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