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Why is ethylene the most widely used hydrocarbon feedstock in the petrochemical industry?
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Dow Chemical plant in South Charleston, West Virginia.
Ethylene is considered the most important and widely used hydrocarbon feedstock in the petrochemical industry primarily due to its high chemical reactivity and versatility as a building block for a vast array of commercial products.12
As an unsaturated olefin, ethylene contains a carbon-carbon double bond, which makes it more chemically reactive than saturated hydrocarbons and easier to convert into other essential chemicals. Its industrial utility is categorized into two main areas:2
- Monomer for Polymers: Approximately half of all produced ethylene is used as a monomer for polymerization, creating polyethylene—a plastic used extensively in packaging, wire coatings, and household goods.31
- Chemical Intermediate: It serves as a vital starting material for numerous two-carbon compounds, including ethanol, ethylene oxide (for antifreeze and polyester), acetaldehyde, and vinyl chloride (for polyvinyl chloride).32
Ethylene is manufactured globally through steam cracking of natural gas components like ethane or petroleum fractions, ensuring a steady supply for these critical industrial applications.31