Membrane-based gas separation processes to separate dehydrogenation reaction products
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United States of America Patent
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Dec 13, 2016
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Dec 6, 2013
filing date -
Dec 6, 2013
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Abstract
Gas separation processes are provided for separating dehydrogenation reaction products from a raw gas stream to recover hydrocarbons, specifically olefins, such as propylene and iso-butene, as well as unreacted feedstock. The processes employ a sequence of partial condensation steps, interspersed with membrane separation steps to raise the hydrocarbon dewpoint of the uncondensed gas, thereby avoiding the use of low-temperature or cryogenic conditions.
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