Apparatus and process for continuous solid-state...

Details Apparatus and process for continuous solid-state... Apparatus and process for continuous solid-state...

2006-08-29

2006-08-29

Acquah, Samuel A. (Department: 1711)

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

Synthetic resins

Treating polymer containing material or treating a solid...

C528S491000, C528S503000, C526S065000, C425S006000, C425S010000

Reexamination Certificate

active

07098300

ABSTRACT:
Disclosed is a multistage fluidized SSP reactor that tightens the distribution of residence time and the resulting average intrinsic viscosity of the polymer product. Less residence time is needed to achieve a desired average intrinsic viscosity. As the polymer beads continuously flow through sequential stages, poly-condensation reactions continue to develop almost under plug-flow conditions. Five fluidized stages or more provide advantageous performance.

REFERENCES:
patent: 4165420 (1979-08-01), Rinehart
patent: 4205157 (1980-05-01), Duh
patent: 5408035 (1995-04-01), Duh
patent: 49-18117 (1969-06-01), None
Article “Reaction Kinetics for Solid-State Polymerization of Poly(ethylene terephthalate)” by B. Duh,Journal of Applied Polymer Science, vol. 81, 1748-1761 (2001).

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