Chemical apparatus and process disinfecting – deodorizing – preser – Chemical reactor – Organic polymerization
Patent
1997-01-15
1998-09-29
Bhat, Nina
Chemical apparatus and process disinfecting, deodorizing, preser
Chemical reactor
Organic polymerization
422137, 422224, 422225, 366 83, 366 85, 366 97, 528272, 5283081, C08F 502, B32B 1902, C08G 6302
Patent
active
058142827
ABSTRACT:
A polycondensation reactor for polyesters, polyamides or polyarylates, for example, in which a low viscosity material is introduced into the reactor and a relative high viscosity polymer exits the reactor. The reactor has at least two longitudinally intersecting cylindrical interior chambers, each with a rotating shaft through its length. Each shaft has a plurality of stirrers and spacers designed to wipe all interior surfaces of the reactor. The stirrers can be shaped as a cycloid or involute profile, for example. Generally the stirrers on each shaft are indexed from one another preferably by 90.degree. and intermesh with stirrers on the adjacent shaft. Stirring the low viscosity material by rotating the stirrers (on the shafts) spreads the material into a plurality of thin films. At the temperature and vacuum conditions of the reactor, a volatile component is removed, thus causing the material to polymerize, by condensation, forming a relatively high viscosity polymer.
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Hey Hartmut
Lohe Hans
Shaw Gordon
Stikeleather W. Jeffrey
Bhat Nina
Clements Gregory N.
Douglas Walter M.
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