Polymerization Product Pressures in Olefin Polymerization

摘要

A process for making a low density polymer in a polymerization reactor system, the process comprising polymerizing an olefin monomer, and optionally an olefin comonomer, in the presence of a diluent in a polymerization reactor to make a polymerization product slurry consisting of a liquid phase and a solid phase, wherein the solid phase comprises an olefin polymer having a density of between about 0.905 g/cm3 to about 0.945 g/cm3; and discharging the polymerization product slurry from the polymerization reactor through a continuous take-off valve to make a mixture further comprising a vapor phase. The mixture comprises a pressure less than a bubble point pressure of a component in the polymerization product slurry.

主权项

1. A process for pressure management of a mixture comprising a liquid phase, a solid phase, and a vapor phase located downstream of a polymerization reactor and upstream of a heater, the process comprising:
reducing a pressure of the mixture to less than a bubble point pressure of at least one component of the liquid phase.