Crystallized pellet/liquid separator
US7875184B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 9, 2006 |
| Grant date | Jan 25, 2011 |
| Priority date | — |
| Expiry date | Apr 12, 2029 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2219/00252
- WIPO fieldChemical engineering
- WIPO sectorChemistry
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 feeding a slurry comprising solid particles and a liquid into a separation zone maintained at a pressure equal to or greater than the vapor pressure of the liquid; contacting the slurry in the separation zone with a porous filter; and separating liquid from the particles, wherein the liquid flows through the filter into an outer annulus defined as a space between a wall of the separation device and the filter, said porous filter having a terminal point beyond which the separated liquid does not pass from the outer annulus back through the filter; accumulating no liquid in the outer annulus or accumulating liquid in the outer annulus at a level below the terminal point, and continuously discharging the separated liquid form the outer annulus through a liquid outlet; and decoupling the particles from the separation zone …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.