Configurations and methods for improved natural gas liquids recovery
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United States of America Patent
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Aug 11, 2015
Grant Date -
Aug 19, 2010
app pub date -
Aug 13, 2008
filing date -
Aug 14, 2007
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Abstract
Contemplated plants for recovery of NGL from natural gas employ alternate reflux streams in a first column and a residue gas bypass stream, wherein expansion of various process streams provides substantially all of the refrigeration duty in the plant. Contemplated plants not only have flexible recovery of ethane between 2% and 90% while recovering at least 99% of propane, but also reduce and more typically eliminate the need for external refrigeration.
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