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US 8,283,507 B2Granted
Water gas shift for acetylene converter feed CO control
AssigneeUop LLC
InventorsDavid A. Wegerer, Kurt M. Vanden Bussche
Life of this patent
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Abstract
A process and apparatus are presented for the removal of carbon monoxide from ethylene streams. The removal of carbon monoxide before selective hydrogenation protects the catalyst in the selective hydrogenation reactor. Carbon monoxide levels are controlled with the water gas shift process to convert the carbon monoxide to carbon dioxide, with the carbon dioxide removed in an acid gas removal process.
Claims19
A process for treating an ethylene product stream, comprising:
- passing the light olefin product stream to an acid gas removal unit to reduce the H2S and CO2, thereby creating a de-acidified light olefin product stream;
- passing the de-acidified light olefin product stream to a water gas shift reactor, thereby generating a treated water gas shift effluent stream having a reduced CO concentration and an increased H2 concentration;
- passing the effluent stream to a selective hydrogenation unit for the conversion of acetylene to ethylene, thereby creating an ethylene enriched product stream;
- and
- passing the enriched ethylene product stream to an ethylene recovery unit.
2 more elements
A process for treating an ethylene product stream, comprising:
- passing the light olefin product stream from a cracking unit to an acid gas removal unit to reduce the H2S and CO2, thereby creating a sweetened light olefin product stream;
- passing the light olefin product stream to a water gas shift reactor, thereby generating a treated stream having a reduced CO concentration and an increased H2 concentration;
- passing a water stream to the water gas shift reactor;
- passing the treated stream to a second acid gas removal unit, thereby creating a treated stream with a reduced CO2 concentration;
- passing the treated stream with the reduced CO2 concentration to a selective hydrogenation unit for the conversion of acetylene to ethylene, thereby creating an ethylene enriched product stream;
- and
- passing the enriched ethylene product stream to an ethylene recovery unit.
4 more elements
Dependencies are inferred from the claim text.