Method of purifying polyolefin
AssigneeLotte Chemical Corporation
InventorsSinyoung Kim, Seong Soo Lim, Suran Lee, Jaeho Kim, Sang Hong Shin
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Abstract
Provided is a method of purifying polyolefin, the method including the step of contacting linear low-density polyethylene synthesized by a gas phase polymerization reaction with a purge gas containing an ethylene gas and an inert gas in a purge bin. According to this purification method, residual alkene monomers with high carbon numbers may be removed in a simpler and more efficient manner.
Claims9
A method of purifying polyolefin, the method comprising the step of contacting a linear low-density polyethylene including residual monomers with a purge gas containing an ethylene gas and an inert gas in a purge bin,
- wherein the linear low-density polyethylene is synthesized by a gas phase polymerization reaction,
- wherein the amount of the residual monomers is 0.01 to 5% by weight based on the total weight of the linear low-density polyethylene,
- wherein the residual monomers include ethylene and 1-octene, and
- wherein the step of contacting the linear low-density polyethylene with the purge gas is performed at a temperature of 25 to 100° C. and a pressure of 1 to 50 kgf/cm2.
Dependencies are inferred from the claim text.