Process for producing hydrogenated petroleum resin

摘要

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.

主权项

1. A method for producing a hydrogenated petroleum resin, comprising:
thermally polymerizing a cyclopentadiene compound and a vinyl aromatic compound to obtain a copolymer; adding hydrogen to the copolymer to obtain a hydrogenated product; separating a hydrogenation solvent from the hydrogenated product using a first evaporator; separating, using a second evaporator, a remaining amount of the hydrogenation solvent and a low molecular weight component from the hydrogenated product from which the hydrogenated solvent is separated by the first evaporator; providing an analytical curve database that stores analytical curve data and a calculating portion that measures physical properties based on the analytical curve data; measuring a near-infrared absorption spectrum of a molten resin from which the hydrogenation solvent and the low molecular weight component are separated; calculating the physical properties of the molten resin based on a measurement result of the near-infrared absorption spectrum and the analytical curve data, thereby calculating a difference between the calculated physical properties and preset target physical properties of the hydrogenated petroleum resin to be produced; and controlling a reaction condition for hydrogenating the molten resin comprising at least one of a temperature, pressure, reaction time and amount of the hydrogen to reduce the difference between the calculated physical properties of the molten resin and the preset target physical properties of the hydrogenated petroleum resin.