Classified catalyst composition, apparatus, and method
First Claim
1. A process for producing a classified catalyst composition comprising:
- introducing a slurry composed of a catalyst composition comprising catalyst particles and catalyst fines into a crossflow classification device;
removing the catalyst fines from the slurry to form a retentate; and
recovering, from the retentate, a classified catalyst composition.
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Abstract
The present disclosure is directed to an apparatus and process for producing a catalyst composition and a low-fines catalyst composition in particular. A crossflow classification device is used to separate large catalyst particles from catalyst fines. A slurry of a catalyst composition is introduced into the crossflow classification device. A classified catalyst composition is retrieved from a retentate produced as a result of subjecting the catalyst slurry to a crossflow classification process. The solids content of the pre-classified and/or post-classified catalyst slurry is determined by way of NMR spectroscopy. The solids content determination accounts for migration of wash liquid from the catalyst composition and into the slurry liquid phase. The classified catalyst composition has a low-fines content and produces a polyolefin composition with a low polymer fines content.
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Citations
20 Claims
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1. A process for producing a classified catalyst composition comprising:
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introducing a slurry composed of a catalyst composition comprising catalyst particles and catalyst fines into a crossflow classification device; removing the catalyst fines from the slurry to form a retentate; and recovering, from the retentate, a classified catalyst composition. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A polymerization process comprising:
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crossflow classifying a slurry of a catalyst composition to form a retentate; recovering a classified catalyst composition from the retentate; contacting the classified catalyst composition with an olefin under polymerization conditions; and forming a polyolefin composition. - View Dependent Claims (11, 12, 13, 14, 15)
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16. An apparatus comprising:
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a crossflow classification device adapted to receive a slurry of a catalyst composition and retain a classified catalyst composition; and a polymerization reactor adapted to receive the classified catalyst composition and an olefin and form a polyolefin. - View Dependent Claims (17, 18, 19, 20)
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Specification