Jx Nippon Oil Energy Corporation

Ryuichiro Furusawa

Koichi Sato

Teruhisa Kuroki

Takeshi Omata

Tatsuya Chiba

A method for producing an olefin polymer, in which an olefin compound is polymerized in the presence of a Lewis acid catalyst at a temperature of 0&#xb0; C. or lower to obtain an olefin polymer, the method comprising a step of feeding a raw material liquid including the olefin compound to a reactor provided with a cooling unit, a step of polymerizing the olefin compound in the reactor to obtain a reaction liquid including the olefin polymer, a deactivation step of adding a deactivator to the reaction liquid taken out from the reactor to deactivate the Lewis acid catalyst, and a step of supplying the reaction liquid after the deactivation step to a cold recovery unit to recover cold from the reaction liquid, wherein the amount of the Lewis acid catalyst is 0.5&#xd7;10to 1.0&#xd7;10mol % based on the total amount of the olefin compound.

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Tokyo, Japan

Ryuichiro Furusawa