Method of separating polymers from mixtures thereof

Details Method of separating polymers from mixtures thereof Method of separating polymers from mixtures thereof

1996-03-26

1998-09-15

Mullis, Jeffrey

Liquid purification or separation

Processes

Including controlling process in response to a sensed condition

210773, 210806, 210808, 210322, 26417215, B01D 5700, B29C 4706

Patent

active

058074902

ABSTRACT:
A method of separating two immiscible, melt-viscosity-differing thermoplastic polymer components from a mixed liquid stream thereof forms two discrete and continuous phases having a sheath/core configuration, wherein the sheath substantially contains the polymer component with the higher melt viscosity and the core substantially contains the polymer component with the lower melt viscosity. The mixed liquid stream contains a predominant amount (i.e., greater than 50% by volume) of the higher viscosity polymer component and a minority amount (i.e., less than 50% by volume) of the lower viscosity polymer component. The method involves directing the stream through a shear zone at a shear temperature and a shear rate sufficient to form the two discrete and continuous phases, the first of which substantially contains the lower viscosity polymer component and the second of which substantially contains the higher viscosity polymer component.

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