Integrated pyrolysis and oxygenate to olefin process
AssigneeUop LLC
InventorsRajeswar R. Gattupalli, Andrea G. Bozzano, Laura E. Leonard, Gregory A. Funk
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Abstract
A method of making light olefins is described. The method involves producing an alkyne in a pyrolysis process. The alkyne is catalytically hydrogenated in a hydrogenation zone to produce a product stream containing a light olefin. A byproduct stream from the pyrolysis process comprises carbon oxide and hydrogen. The byproduct stream is treated to convert the carbon oxide and the hydrogen to an oxygenated product in a carbon oxide conversion zone, which can then be converted to an olefin in an oxygenate to olefin process.
Claims16
A method of making light olefins comprising:
- combusting a fuel and an oxidizer in a combustion zone of a pyrolytic reactor to create a combustion gas stream;
- transitioning a velocity of the combustion gas stream from subsonic to supersonic in an expansion zone of the pyrolytic reactor;
- injecting a light hydrocarbon into the supersonic combustion gas stream to create a mixed stream including the light hydrocarbon;
- transitioning the velocity of the mixed stream from supersonic to subsonic in a reaction zone of the pyrolytic reactor to produce a reaction mixture comprising an alkyne, carbon oxide, and hydrogen;
- separating the reaction mixture in an absorber into an alkyne stream comprising the alkyne and a byproduct stream comprising the carbon oxide and the hydrogen;
- catalytically hydrogenating the alkyne in a hydrogenation zone to produce a product stream containing a first light olefin;
- treating the byproduct stream to convert at least a portion of the carbon oxide and the hydrogen to an oxygenated product in a carbon oxide conversion zone;
- treating the oxygenated product in an oxygenate conversion zone to convert at least a portion of the oxygenated product to produce an effluent comprising a second light olefin;
- and
- separating the first light olefin from the product stream and separating the second light olefin from the effluent in a product separation zone.
A method of making light olefins comprising:
- combusting a fuel and an oxidizer in a combustion zone of a pyrolytic reactor to create a combustion gas stream;
- transitioning a velocity of the combustion gas stream from subsonic to supersonic in an expansion zone of the pyrolytic reactor;
- injecting a light hydrocarbon into the supersonic combustion gas stream to create a mixed stream including the light hydrocarbon;
- transitioning the velocity of the mixed stream from supersonic to subsonic in a reaction zone of the pyrolytic reactor to produce a reaction mixture comprising an alkyne, carbon oxide, and hydrogen;
- separating the reaction mixture in an absorber into an alkyne stream comprising the alkyne and a byproduct stream comprising the carbon oxide and the hydrogen;
- catalytically hydrogenating the alkyne in a hydrogenation zone to produce a product stream containing a first light olefin;
- treating the byproduct stream to convert at least a portion of the carbon oxide and the hydrogen to an oxygenated product in a carbon oxide conversion zone;
- treating the oxygenated product in an oxygenate conversion zone to convert at least a portion of the oxygenated product to produce an effluent comprising a second light olefin;
- and
- separating the first light olefin from the product stream and separating the second light olefin from the effluent in a product separation zone.
Dependencies are inferred from the claim text.