Jx Nippon Oil Energy Corporation

Jx Nippon Chemical Texas Inc.

Takeshi Omata

Takashi Suzuki

Satoshi Mori

Takashi Morikita

Takaaki Takeshita

Koichi Sato

Teruhisa Kuroki

Tatsuya Chiba

Ryuichiro Furusawa

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.

Method for producing olefin polymer

A first method for refining dicyclopentadiene of the present invention is characterized in that the method separates and recovers dicyclopentadiene by distilling the crude dicyclopentadiene that contains dicyclopentadiene and is obtained by removing a C5 fraction and a BTX fraction from the reaction product obtained by dimerization reaction of the cracked gasoline by-produced in an ethylene plant that uses as feed stock a C2 fraction, a C3 fraction and a C4 fraction. A second method for refining dicyclopentadiene of the present invention is characterized in that the dicyclopentadiene-containing fraction refined by distillation is brought into contact with an inert gas or a hydrocarbon gas having 1 to 3 carbon atoms.

Method for refining dicyclopentadiene

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Pasadena, TX, United States of America

Takeshi Omata