Methods and systems for controlling polymer particle size

Details Methods and systems for controlling polymer particle size Methods and systems for controlling polymer particle size

2009-12-07

2011-11-15

Cheung, William (Department: 1762)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymerizing in tubular or loop reactor

C526S352000, C422S132000

Reexamination Certificate

active

08058367

ABSTRACT:
Techniques are provided for producing polymer particles of a size just slightly larger than the size of polymer fines. The technique may prevent or limit the occurrence of reactor fouls associated with large polymer particles. The technique also may provide a greater weight percentage of solids in the reactor. The desired polymer particle size may be achieved by employing a catalyst having particles of a size determined based on the expected catalyst productivity. In certain embodiments, the catalyst particle size may be determined based on the expected catalyst productivity, the polymer particle density, the catalyst particle density, and/or the polymer particle size.

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International Search Report and Written Opinion for PCT/US2010/056024 mailed Feb. 16, 2011.

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