Natural Gas Liquids (NGL) fractionation plants use a series of columns to extract NGLs from natural gas. Once the methane based natural gas is separated from raw natural gas in the demethanizer, the remaining mixed Y-grade stream can be divided further into ethane, propane, and butanes by processing the gas through fractionation columns. Operation of the fractionation columns is optimized so that the overhead streams yield individual hydroca

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