Polyolefin production with different diluents in multiple polymerization reactors
AssigneeChevron Phillips Chemical Company LP
InventorsMaruti Bhandarkar, Elizabeth A Benham, Rebecca A. Gonzales, Scott E. Kufeld, Joel A Mutchler, Catherine M. Gill, Thanh T. Nguyen, Timothy O. Odi
Life of this patent
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Abstract
A system and method for producing polyolefin, including a polyolefin reactor system having: a first reactor to produce a first reactor discharge stream having a first polyolefin and a first diluent; and a second reactor to receive at least a portion of the first reactor discharge stream and to produce a second reactor discharge stream having a second polyolefin and a second diluent, wherein the second diluent is different than the first diluent.
Claims32
A polyolefin reactor system comprising:
- a first reactor configured to produce a first reactor discharge stream comprising a first polyolefin and a first inert diluent composition;
- and
- a second reactor configured to receive at least a portion of the first reactor discharge stream and to produce a second reactor discharge stream comprising a second polyolefin and a second inert diluent composition, wherein the second inert diluent composition is different than the first inert diluent composition.
A polyolefin reactor system comprising:
- a first reactor configured to receive a first inert diluent and to produce a first reactor discharge comprising the first inert diluent and a first polyolefin;
- a separator configured to receive at least a portion of the first reactor discharge and to form:
- (1) a recycle stream comprising the first inert diluent;
- and (2) a separator product stream comprising the first polyolefin;
- a second reactor configured to receive a second inert diluent and the diluent separator product stream, and to produce a second reactor discharge comprising, the second inert diluent and a second polyolefin;
- and
- wherein the first inert diluent is different than the second inert diluent.
A polyolefin reactor system comprising:
- a first reactor configured to receive a first diluent and to produce a first reactor discharge comprising the first diluent and a first polyolefin;
- a separator selected from a wash column and a decanter configured to receive at least a portion of the first reactor discharge and to form:
- (1) a recycle stream comprising the first diluent;
- and (2) a separator product stream comprising the first polyolefin;
- a second reactor configured to receive a second diluent and the diluent separator product stream, and to produce a second reactor discharge comprising the second diluent and a second polyoefin;
- and
- wherein the first diluent is different than the second diluent.
A polyolefin reactor system comprising:
- a first polymerization reactor configured to polymerize olefin monomer in the presence of a first inert diluent, and to discharge continuously a transfer slurry comprising a first polyolefin and the first inert diluent;
- a separation system configured to receive the transfer slurry and to discharge a recycle stream comprising the first inert diluent, and to discharge a concentrated slurry comprising the first polyolefin;
- and
- a second polymerization reactor configured to receive the concentrated slurry from the separation system, polymerize olefin monomer in the presence of a second inert diluent, and discharge a product slurry comprising a second polyolefin, wherein the second inert diluent is different than the first inert diluent.
A polymerization reactor system comprising:
- a first loop reactor configured to polymerize olefin monomer in a first inert diluent to produce a first polyolefin, and to discharge continuously a transfer slurry comprising the first polyolefin and the first inert diluent;
- a separation system configured to remove the first inert diluent from the transfer slurry, and to discharge a concentrated slurry comprising the first polyolefin to a second loop reactor;
- the second loop reactor configured to polymerize olefin monomer in a second inert diluent to produce a second polyolefin, and to discharge a product slurry comprising a product polyolefin having the first polyolefin and the second polyolefin;
- and
- wherein the first inert diluent is different than the second inert diluent.
Dependencies are inferred from the claim text.