Carbon dioxide hydrocarbons separation process utilizing liquid-liquid extraction
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United States of America Patent
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Oct 15, 1985
Issued Date -
N/A
app pub date -
Jul 30, 1984
filing date -
Feb 24, 1984
priority date (Note) -
Expired
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Abstract
Carbon dioxide is cryogenically separated from methane and then is separated from the ethane by liquid extraction with water at high pressures of 500 to 2250 psia thus avoiding the CO.sub.2 --C.sub.2 H.sub.6 azeotrope problem. The process is particularly applicable to the recovery of high pressure pure carbon dioxide from the wellhead products of carbon dioxide flooding used in enhanced oil recovery. The high pressure pure carbon dioxide liquid is pumped for reinjection to the well.
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