Drying and gas or vapor contact with solids – Process – By centrifugal force
Reexamination Certificate
2005-05-23
2011-12-20
Rinehart, Kenneth B (Department: 3743)
Drying and gas or vapor contact with solids
Process
By centrifugal force
C034S325000, C034S405000, C034S413000, C034S058000
Reexamination Certificate
active
08079158
ABSTRACT:
A process for feeding a slurry of thermoplastic synthetic polymer particles such as polyethylene terephthalate homopolymers and copolymers in combination with a liquid such as water at a liquid temperature greater than the normal boiling point of the liquid, under a pressure greater than the vapor pressure of the liquid at the liquid temperature, into a separation zone such as a centrifugal dryer, and within the separation zone:a. separating the liquid from the particles, andb. drying the particles;while under a high pressure equal to or greater than the vapor pressure of the liquid. There is also provided a process for decoupling the dried particles from the separation zone to an atmosphere having a pressure less than the vapor pressure of the liquid while maintaining the vapor pressure of the particles prior to decoupling equal to or above the vapor pressure of the liquid at the liquid temperature.
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Ekart Michael Paul
Hudson Andrew S.
Isaac Raymond
Samitier Luciano Dalmacio
Grupo Petrotemex, S.A. de C.V.
Oblon, Spivak McClelland, Maier & Neustadt, L.L.P.
Rinehart Kenneth B
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