Process and apparatus for reducing take-off valve plugging...

Details Process and apparatus for reducing take-off valve plugging... Process and apparatus for reducing take-off valve plugging...

2006-03-21

2006-03-21

Teskin, Fred (Department: 1713)

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

Synthetic resins

Polymerizing in tubular or loop reactor

C526S088000

Reexamination Certificate

active

07015289

ABSTRACT:
A slurry polymerization process removes a portion of the fluid slurry without using a settling leg or a continuous take-off. The process uses a reactor take-off valve that is periodically fully closed and fully opened such that the withdrawn slurry is removed from the reactor in a discontinuous manner. The regular, periodic full closing and full opening of the take-off valve reduces instances of polymer plugging the take-off valve. In another aspect of the invention, a take-off valve is throttled in a repetitive pattern to reduce plugging of the take-off valve.

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The American Heritage Dictionary (2d ed), Houghton Mifflin, Boston, p. 923 (1982).

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