Title:
CRYSTALLIZED PELLET/LIQUID SEPARATOR
Document Type and Number:
WIPO Patent Application WO/2007/037968
Kind Code:
A3
Abstract:
A process and apparatus which reduces the fines in a liquid discharge stream and/or increases the dryness of a solids discharge stream while under a pressure equal to or greater than the vapor pressure of the liquid. There is provided a process for separating particles such as polyethylene terephthalate or polyethylene naphthalate from a liquid in a slurry comprising: a. feeding a slurry comprising solid particles and a liquid into a within a separation zone maintained at a pressure equal to or greater than the vapor pressure of the liquid; b. contacting the slurry in the separation zone with a porous filter, optionally a microfilter, nanofilter, reverse osmosis filter, or ultrafilter, and separating liquid from the particles, wherein the liquid flows through the filter into an outer annulus defined as a space between the wall of the separation device and the filter, and said porous filter optionally having a terminal point beyond which the separated liquid does not pass from the outer annulus back through the filter; c. accumulating no liquid in the outer annulus or accumulating liquid in the outer annulus at a level below or in front of the terminal point, and continuously discharging the separated liquid from the outer annulus through a liquid outlet; d. decoupling the particles from the separation zone through the solids outlet to a low pressure below the vapor pressure of the liquid at the liquid temperature within the separation zone while maintaining a pressure on the particles prior to decoupling at or above the vapor pressure of the liquid within the separation zone.
Inventors:
PARKER KENNY RANDOLPH (US)
LIN ROBERT (US)
ISAAC RAYMOND (US)
HALL DUANE ALAN (US)
LIN ROBERT (US)
ISAAC RAYMOND (US)
HALL DUANE ALAN (US)
Application Number:
PCT/US2006/035364
Publication Date:
September 02, 2010
Filing Date:
September 13, 2006
Export Citation:
Assignee:
EASTMAN CHEM CO (US)
International Classes:
B01J8/22; B01D63/06; B01J8/00; C08G63/88; B01D9/00; B29B9/00
Foreign References:
| US20050154183A1 | 2005-07-14 | |||
| US20050065318A1 | 2005-03-24 |
Attorney, Agent or Firm:
CARMEN, Dennis, V. (Kingsport, TN, US)
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