Polymerization product pressures in olefin polymerization

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United States of America Patent

PATENT NO 9120886
SERIAL NO

14447973

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Abstract

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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.

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Patent Owner(s)

Patent OwnerAddress
CHEVRON PHILLIPS CHEMICAL COMPANY LPP O BOX 4910 THE WOODLANDS TX 77387-4910

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Hottovy, John D Kingwood, US 97 2939
Kufeld, Scott E Houston, US 87 1251

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