Idemitsu Kosan Company, Limited

Jun Mase

Masao Aida

Jun Kohiruimaki

Kana Minamimoto

Akio Kojima

Shinji Miyamoto

Masao Saito

Hideki Sato

Toyozo Fujioka

Toshiaki Kusaba

Yushi Matsuda

A method for producing an olefin polymer including: polymerizing one or more &#x3b1;-olefins each having 6 to 20 carbon atoms in the presence of a metallocene catalyst to obtain an olefin polymer; deactivating and decalcifying the catalyst to obtain a decalcified polymerization reaction liquid; mixing the decalcified polymerization reaction liquid containing the olefin polymer with water; and washing the liquid with stirring at a stirring intensity of 0.1 kW/mor more for 1 minute or longer.

Method for producing olefin polymer

A method for producing an olefin polymer including: polymerizing one or more &#x3b1;-olefins each having 6 to 20 carbon atoms in the presence of a metallocene catalyst to obtain an olefin polymer, and diluting a polymerization reaction liquid with a solvent before or simultaneously with deactivation of the catalyst, thereby to lower the liquid viscosity of the polymerization reaction liquid to 10 mPa&#xb7;s or less to promote deactivation and decalcification of the catalyst.

A method for producing an &#x3b1;-olefin oligomer including: polymerizing in the presence of a catalyst one or more &#x3b1;-olefins having 6 to 20 carbon atoms to produce an &#x3b1;-olefin oligomer; and deactivating the catalyst by a deactivator from which oxygen is removed. A method for producing an &#x3b1;-olefin oligomer including: polymerizing in the presence of a catalyst one or more &#x3b1;-olefins having 6 to 20 carbon atoms to produce an &#x3b1;-olefin oligomer; and passing the reaction solution containing the &#x3b1;-olefin oligomer through a bag filter.

Method for producing alpha-olefin oligomer

The present invention provides a process of an industrially advantageous production of high-purity adamantane at a low cost and with a high efficiency by isomerizing trimethylenenorbornane contained in a raffinate obtained from a platfinate.

Process for producing adamantane

An industrially advantageous process for producing adamantane by which high-purity adamantane reduced in coloration is efficiently produced while minimizing the loss. The process, which is for producing adamantane by isomerizing trimethylenenorbornane, includes (A) a reaction step of isomerizing the starting material, (B) a concentration step of concentrating the adamantane contained in the resultant liquid reaction mixture, (C) a crystallization step of precipitating the concentrated adamantane, (D) a solid-liquid separation step of separating the adamantane crystals from the slurry resulting from the crystallization, (E) a washing step of washing the isolated adamantane crystals, and (F) a drying step of drying the adamantane crystals washed, characterized in that the mass ratio of the endo-trimethylenenorbornane to the adamantane each contained in the materials to be subjected to the crystallization step (C) (endo-trimethylenenorbornane/adamantane) is 0.25 or lower.

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Ichihara, Japan

Jun Mase