Method of separating a polymer from a solvent

Details Method of separating a polymer from a solvent Method of separating a polymer from a solvent

2007-06-05

2007-06-05

Zemel, Irina S. (Department: 1711)

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

Synthetic resins

Treating polymer containing material or treating a solid...

C528S203000, C528S499000, C528S500000, C528S501000, C525S390000

Reexamination Certificate

active

11145816

ABSTRACT:
A method of separating a polymer-solvent mixture is described wherein a polymer-solvent mixture is heated prior to its introduction into an extruder comprising an upstream vent and/or a side feeder vent to allow flash evaporation of the solvent, and downstream vents for removal of remaining solvent. The one-step method is highly efficient having very high throughput rates while at the same time providing a polymer product containing low levels of residual solvent.

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