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C4 fraction: The Four-Carbon Stream Quietly Powering Rubber, Fuel Blending, Polymer Chemistry and Petrochemical Infrastructure
Every large naphtha cracker produces a visible product slate and an invisible negotiation. Ethylene gets the headline, propylene gets the investment deck, aromatics get the refinery discussion, but C4 fraction sits in the middle as a four-carbon stream that decides how much value a petrochemical site can extract from every tonne of cracked feed. In a typical naphtha-fed steam cracker, 3% to 8%...
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