Process for separating carbon dioxide and argon from hydrocarbons
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United States of America Patent
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Sep 27, 2022
Grant Date -
Sep 16, 2021
app pub date -
Jun 17, 2019
filing date -
Jul 13, 2018
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Abstract
Systems and methods for producing ethylene oxide (EO) are disclosed. Ethylene oxide is produced by direct oxidizing ethylene with oxygen in a reactor. The effluent from the reactor is processed to produce (a) a product stream comprising water and ethylene oxide, (b) a reabsorber overhead stream comprising ethylene, methane, argon, and carbon dioxide, and (c) a carbonate flash gas stream comprising carbon dioxide, ethylene, methane, and water. The reabsorber overhead stream and the carbonate flash gas stream are combined to form a reclaim gas stream. The reclaimed gas stream is separated in a membrane separation unit to remove carbon dioxide and argon, forming a recycle stream comprising primarily ethylene and methane, collectively.
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