POLYMER DEGASSING PROCESS CONTROL

摘要

Process for operating a vertical fixed bed degasser which is continuously fed with an active polymer powder produced by a catalytic olefin polymerization process in a polymerization reactor. The polymerization conditions in the degasser are such that there is produced an additional amount of polymer corresponding to between 0.001 and 0.015 times the amount which entered the degasser. The degassing process includes introducing into the degasser a stripping gas containing principal monomer, with the temperature inside the degasser being the polymerization reactor temperature plus or minus 20° C.