Method of removing oxygenate contaminants from an olefin stream
AssigneeExxonMobil Chemical Patents Inc.
InventorsJames R. Lattner, David R. Lumgair JR.
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Abstract
This invention is directed to a method of removing acetaldehyde, CO2 and/or water from an ethylene and/or propylene containing stream. In this invention, acetaldehyde and C4+ olefins are substantially removed from the ethylene and/or propylene containing stream. The stream is then acid gas treated. The ethylene and/or propylene streams which are separated and recovered according to this invention can be further processed, for example, to make polymers such as polyethylene and polypropylene.
Claims45
A method of treating an ethylene and/or propylene containing stream, comprising:
- providing an olefin stream containing ethylene, propylene, C4+ olefins and acetaldehyde;
- separating the olefin stream into a first fraction and a second fraction, wherein the first fraction comprises at least a majority of the ethylene and/or propylene present in the olefin stream, and the second fraction comprises at least a majority of the C4+ olefins and acetaldehyde present in the olefin stream;
- and
- acid gas treating the first fraction.
A method of treating an ethylene and/or propylene containing stream made from an oxygenate to olefin process comprising:
- contacting oxygenate with a molecular sieve catalyst to form an olefin stream comprising ethylene, propylene, and acetaldehyde;
- separating the olefin stream into a first fraction and a second fraction, wherein the first fraction comprises at least a majority of the ethylene and/or propylene present in the olefin stream, and the second fraction comprises at least a majority of the acetaldehyde present in the olefin stream;
- and
- acid gas treating the first fraction.
A method of treating an ethylene containing stream, comprising:
- providing an olefin stream containing ethylene, propylene, C4+ olefins and acetaldehyde;
- separating the olefin stream into a first fraction and a second fraction, wherein the first fraction comprises at least a majority of the ethylene present in the olefin stream and the second fraction comprises at least a majority of the propylene, C4+ olefin and acetaldehyde present in the olefin stream;
- and
- acid gas treating the first fraction.
A method of treating an ethylene and propylene containing stream comprising:
- providing an olefin stream containing ethylene, propylene, C4+ olefins and acetaldehyde;
- separating the olefin stream into an first fraction and a second fraction, wherein the first fraction comprises at least a majority of the ethylene and propylene present in the olefin stream, and the second fraction comprises at least a majority of the C4+ olefins and acetaldehyde present in the olefin stream;
- and
- acid gas treating the first fraction.
Dependencies are inferred from the claim text.