Production of olefin derivatives
AssigneeExxonMobil Chemical Patents Inc.
InventorsKeith H. Kuechler, Minquan Cheng, Marc L. DeChellis, David R. Lumgair, Jr., Russell D. Sellen, Gary F. Janda
Life of this patent
Estimating the term…
Abstract
Disclosed is a system of making an olefin derivative from a dilute olefin feed. Dilute olefin is sent to an olefin reaction unit to form an olefin derivative product. The olefin derivative product is recovered from the reaction unit while a vent stream is also removed. Olefin is separated from the vent stream, and the olefin is sent to the olefin reaction unit for additional processing.
Claims56
A method of making an olefin derivative from an olefin stream, comprising:
- introducing a dilute olefin stream comprising ethylene and/or propylene into an olefin reaction unit;
- forming an olefin derivative product within the reaction unit;
- removing the olefin derivative product and a vent stream from the olefin reaction unit;
- separating the vent stream into an ethylene and/or propylene containing stream and a purge stream;
- sending the ethylene and/or propylene containing stream to the olefin reaction unit;
- and
- purging the purge stream from the reaction unit.
A method of making polyolefin from an oxygenate, comprising:
- contacting an oxygenate feed with a molecular sieve catalyst to form an olefin-containing product, wherein the olefin-containing product contains ethylene and/or propylene and less than 10 ppm wt. of a contaminant selected from hydrogen sulfide, carbonyl sulfide, and arsine;
- separating ethylene and/or propylene from the olefin-containing product;
- contacting the separated olefin with a polyolefin forming catalyst to form a reaction stream comprising polyolefin and a vent gas, wherein the vent gas comprises unreacted ethylene and/or propylene;
- separating the vent gas into an ethylene and/or propylene containing stream and a purge stream;
- purging the purge stream;
- and
- contacting at least a portion of the unreacted olefin with the polyolefin forming catalyst to form polyolefin.
A process for producing polyethylene, comprising:
- contacting an oxygenate containing feed with a molecular sieve catalyst to form an ethylene containing product stream;
- introducing at least a portion of the ethylene containing product stream into a polyethylene reaction unit to form polyethylene;
- forming polyethylene within the polyethylene reaction unit;
- removing the polyethylene product and a vent stream from the polyethylene reaction unit;
- separating ethylene from the vent stream;
- and
- sending the ethylene to the polyethylene reaction unit.
A process for producing polypropylene, comprising:
- contacting an oxygenate containing feed with a molecular sieve catalyst to form a propylene containing product stream;
- introducing at least a portion of the propylene containing product stream into a polypropylene reaction unit to form polypropylene;
- forming polypropylene within the polypropylene reaction unit;
- removing the polypropylene product and a vent stream from the polypropylene reaction unit;
- separating propylene from the vent stream;
- and
- sending the propylene to the polypropylene reaction unit.
Dependencies are inferred from the claim text.