Patent ID: 9421534
Filing Date: 2016-08-23
CPC Classification: B01J,C07C,C08F,Y02P

Claim Text:
1. A method of producing an α-olefin polymer, the method comprising: subjecting an α-olefin to polymerization reaction in a solvent supplied to a reactor in the presence of a chromium catalyst; and adjusting a proportion of an inert gas in a gas phase of the reactor, such that the proportion of the inert gas is from 0.010 to 50.00% by volume, to obtain an α-olefin polymer comprising 2 to 10 units of the α-olefin as a monomer in polymerized form, wherein: the inert gas is nitrogen, a rare gas, or a mixture thereof; an unreacted α-olefin and the solvent are separated from a reaction liquid obtained by the polymerization reaction of the α-olefin; the solvent separated from the reaction liquid obtained by the polymerization reaction of the α-olefin is circulated into the reactor without passing through a tank containing the inert gas, such that inert gas existing in the gas phase part of the tank is prevented from being dissolved in the solvent circulated into the reactor; and the unreacted α-olefin and the solvent separated from the reaction liquid are circulated into the reactor.