Polymerization reactor

Details Polymerization reactor Polymerization reactor

2005-11-15

2005-11-15

Cheung, William K. (Department: 1713)

Chemical apparatus and process disinfecting, deodorizing, preser

Chemical reactor

Organic polymerization

C526S064000

Reexamination Certificate

active

06964754

ABSTRACT:
A setting leg for a polymerization reactor connected to the lower part of the loop reactor (1). A conduit (2) is welded to the loop reactor and leads to upper valve (3) and lower block valve (4). Downstream of the lower block valve (4) is a further conduit (5) which leads to a lower region (6) and to a product take off (PTO) valve7. Conduit (5) has a significantly greater cross-sectional area than conduit (2). In use, the block valves (3) and (4) are always open to allow slurry from the reactor loop to enter the settling leg. The PTO valve (7) is regularly opened to allow the settled polyethylene “fluff” to be rapidly expelled along conduit (8). The greater area of conduit (5) significantly increases the settling rate ad polymer concentration of the polyethylene “fluff”.

REFERENCES:
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patent: 4121029 (1978-10-01), Irvin et al.
patent: 4395523 (1983-07-01), Kirch
patent: 4461889 (1984-07-01), Hanson
patent: 4613484 (1986-09-01), Ayres et al.
patent: 5183866 (1993-02-01), Hottovy
patent: 5575979 (1996-11-01), Hanson
patent: 0891990 (1999-01-01), None
patent: WO 01/05842 (2001-01-01), None

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