Idemitsu Kosan Company, Limited

Shinji Miyamoto

Akio Kojima

Jun Mase

Masao Saito

Toyozo Fujioka

Makoto Kashima

Tatsuyoshi Yokota

Hideki Tanimura

Toshiaki Kusaba

Naoya Kawano

Tuan Anh Tran

Yuichi Ohkawa

A method for producing an &#x3b1;-olefin oligomer, the method including subjecting &#x3b1;-olefin to oligomerization reaction to produce an &#x3b1;-olefin oligomer mixture, carrying out distillation separation of &#x3b1;-olefin oligomer having less than n carbon atoms in the mixture to obtain a distillation residue containing &#x3b1;-olefin oligomer having n or more carbon atoms, and then carrying out a step of removing high molecular weight molecules from the distillation residue.

Method for producing alpha-olefin oligomer

Disclosed is a method for producing a polyolefin including: (1) a step (1) of polymerizing one or more olefins in solution polymerization or slurry polymerization in the presence of a polymerization catalyst to produce a polymer solution, (2) a step (2) of taking out the polymer solution obtained in the step (1), and adding a catalyst deactivator in the polymer solution to deactivate the polymerization catalyst, and (3) a step (3) of removing volatile components in vacuum from the polymer solution where the polymerization catalyst has been deactivated, and including, between the step (2) and the step (3), a step of adding an additive to the polymer solution when the water concentration in the polymer solution is 5 ppm by mass or less.

Method for producing polyolefin

A manufacturing method of a hydrogenated petroleum resin of the invention includes: a thermal polymerization step of thermally polymerizing a cyclopentadiene compound and a vinyl aromatic compound; a hydrogenation reaction step; and a volatile-component removal step, in which the volatile-component removal step is performed using a volatile-component removal device including: a pressuring device configured to pressurize a reaction mixture; a heater configured to heat the reaction mixture pressurized by the pressuring device under pressure; a decompression unit including a decompression space, a pressure of which is reduced and into which the pressurized and heated reaction mixture is flowed; and a path member including a flow path through which the reaction mixture passes and provided in the decompression space so that the reaction mixture flowed in the decompression space of the decompression unit passes through the flow path.

Method for producing hydrogenated petroleum resin

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

Shinji Miyamoto