Class of double-bonded aliphatic hydrocarbons made by cracking naphtha, LPG or gasoil at high temperatures. Occur in gaseous form. The main olefins are ethylene and propylene.

A family of hydrocarbons with one carbon-carbon double bond.

Unsaturated hydrocarbons of the type Cn-H2n, indicated by the suffix -ene. (Grant & Hackh's Chemical Dictionary, 5th ed, p408)

Alicyclic Hydrocarbons in which three or more of the Carbon atoms in each molecule are united in a ring structure and each of the ring Carbon atoms is joined to two Hydrogen atoms or alkyl groups. The [..]

Collective term for ethylene, propylene and butadiene.

oh-luh-fins Basic chemicals made from oil or natural gas liquids feed stocks; commonly used to manufacture plastics and gasoline. Examples are ethylene and propylene.

a class of hydrocarbons, including ethylene and propylene, of particular importance as feedstock to the chemical industry.

A class of unsaturated paraffinic hydrocarbons recovered from petroleum, of which butene, ethylene, and propylene are examples.

A class of unsaturated paraffin hydrocarbons. These include things like ethylene and propylene.

Class of unsaturated double bond linear hydrocarbons recovered from petroleum; examples include ethylene, propylene and butene. Olefins are used to produce a variety of products, including plastics, f [..]

Olefins are petrochemical derivatives produced by cracking feedstocks from raw materials such as natural gas and crude oil. Lower olefins have short chains with only two, three or four carbon atoms, and the simplest one is ethylene. The higher olefins have chains of up to twenty or more carbon atoms. The main olefin products are ethylene, propylene [..]

See Alkenes.

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