Idemitsu Kosan Company, Limited

Makoto Kashima

Hajime Takasugi

Yasushi Shiraki

Hironori Tashiro

Shinji Miyamoto

Hideki Tanimura

Yuichi Ohkawa

Takanori Hayashi

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

A groove inclined path for diagonally downwardly delivering hydrogenated petroleum resin pellets loaded through a loading port is provided in a storage hopper for storing the hydrogenated petroleum resin pellets. The groove inclined path is defined by a plurality of groove-inclined-path members each having an inclined plate and side plates to define a groove structure, the groove-inclined-path members being vertically disposed so that flow directions of the hydrogenated petroleum resin pellets become opposite. The vertically adjacent ones of the groove-inclined-path members are disposed so that the hydrogenated petroleum resin pellets dropped from upper one of the groove-inclined-path members are brought into contact with the plate member of immediately lower one of the groove-inclined-path members to reverse a flow direction thereof, thereby reducing a flow speed of the hydrogenated petroleum resin pellets.

Storage device for granular material

After a cyclopentadiene compound and a vinyl aromatic compound are thermally polymerized, the obtained copolymer is subjected to a hydrogenation reaction to form a hydrogenated product. After most of the hydrogenation solvent is separated by a solvent evaporation tank from the hydrogenated product, an additive separately prepared by dissolving an antioxidant is added to the hydrogenated product to form a mixture. While the hydrogenation solvent is a naphthenic solvent, the additive is prepared by dissolving the antioxidant in an aromatic additive solvent having the same carbon atoms as those of the hydrogenation solvent. Then, the low-molecular-weight component as well as the remaining hydrogenation solution and the additive solvent are separated by a thin-film evaporator from the mixture. The obtained molten resin is pelletized to produce hydrogenated petroleum resin pellets. The time for uniformly blending the antioxidant can be shortened.

Hydrogenated petroleum resin pellet production method

A method including measuring a near-infrared absorption spectrum of a hydrogenated compound in the form of a molten resin from which a hydrogenation solvent is separated to calculate an aromatic content ratio and a softening point as physical property values of the hydrogenated compound based on analytical curve data. At least one of a temperature, pressure, reaction time and hydrogen content in a hydrogenating portion is controlled such that a difference between the aromatic content ratio and the bromine number measured in the near-infrared spectrometry and an aromatic content ratio and bromine number of a target hydrogenated petroleum resin pellet becomes small.

Process for producing hydrogenated petroleum resin

The invention is directed to a technique for effectively producing an amide compound suitable for use as a solvent or a detergent on a large scale and at low cost.

Method for producing alpha,beta-unsaturated carboxylic acid-N,N-disubstituted amide and method for producing 3-alkoxycarboxylic acid-N,N-disubstituted amide

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Ichihara, Japan

Makoto Kashima