Chemical apparatus and process disinfecting – deodorizing – preser – Chemical reactor – Organic polymerization
Reexamination Certificate
2001-01-08
2010-12-14
Leung, Jennifer A (Department: 1797)
Chemical apparatus and process disinfecting, deodorizing, preser
Chemical reactor
Organic polymerization
C422S132000, C422S134000, C422S135000, C422S138000, C422S225000, C422S228000, C422S234000
Reexamination Certificate
active
07850926
ABSTRACT:
A process for the discontinuous production of granules from polycondensation polymers by precondensation of an oligomer at 5 to 400 mbar and subsequent polycondensation in a stirring reactor and subsequent granulation. In the vicinity of the outlet port, the density of the entraining surfaces lies between 1 and 8 m2per m3reactor space and constantly increases with increasing distance from the discharge region. Inside the reactor, there is a viscosity gradient between the region most remote from the discharge port and the zone of the discharge port. The thermal decomposition of the polymer melt flowing out of the reactor is compensated during granulation.The stirring reactor with horizontal longitudinal axis approximately has the shape of a single or double truncated cone. The reactor has rotatable, vertical product entraining surfaces and stationary scrapers between the same.
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Finkeldei Ferdinand
Wilhelm Fritz
Leung Jennifer A
Lurgi Zimmer GmbH
Norris McLaughlin & Marcus PA
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