Patent ID: 6818186
Filing Date: 2004-11-16
Classification: B01J,C08F

Abstract:
A recovery and purification system for a liquid medium from a slurry polymerization, the system comprising:a first fluid passage connected at one end to a slurry polymerization reactor; a flash gas separator connected to an opposite end of the first fluid passage, for separating a vapor stream comprising solid polymer particles in a liquid medium; a vapor removal line connected at a top portion of the flash gas separator, for transporting the vapor stream from the flash gas separator; a first condenser downstream of the vapor removal line; a collection tank downstream of the first condenser; a vapor bypass line providing a bypass for a portion of the vapor stream around the condenser to the collection tank; a bypass valve for controlling the flow of vapor through the vapor bypass line; a liquid delivery line at a bottom portion of the collection tank; a vapor recycle line at a top portion of the collection tank; a second condenser fluidly connected to the vapor recycle line; and a second fluid passage connecting the output of the second condenser to the slurry polymerization reactor.