Bitumen is hydrocarbon material, black to dark brown which completely solved in carbon sulfide and carbon tetrachloride.

Bitumen is solid at ambient temperature. But with increasing temperature becomes a paste and then change to liquid.

Ethylene, is the simplest unsaturated hydrocarbon and also is the first member of the alkenes group. Its chemical formula is C2H4 and there are double bond between two carbon atoms.

Base Oil

Today different refining processes for the production of base oils are common that is, it could lead to the production of base oils with different properties. American Petroleum Association (API) has classified the chemical and physical properties of the base oils according to their specifications and you're viewing the classification by the end of the page.