NGL recovery methods and configurations
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United States of America Patent
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Aug 9, 2016
Grant Date -
Feb 25, 2010
app pub date -
Jul 20, 2006
filing date -
Jul 25, 2005
priority date (Note) -
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Abstract
Contemplated NGL plants include a feed gas bypass circuit through which a portion of the feed gas is provided downstream to a vapor portion of the feed gas to thereby increase turbo expander inlet temperature and demethanizer temperature. Contemplated configurations are especially advantageous for feed gases with relatively high carbon dioxide content as they entirely avoid carbon dioxide freezing in the demethanizer, provide additional power production by the turboexpander, and recover C2+ components to levels of at least 80% while achieving a low carbon dioxide content in the NGL product.
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