Title:
METHOD FOR PRODUCING PETROLEUM PITCH AND PETROLEUM PITCH
Document Type and Number:
WIPO Patent Application WO/2023/233847
Kind Code:
A1
Abstract:
Provided are a petroleum pitch having a high fixed carbon content and excellent impregnability into fired bodies during production of carbon materials such as graphite electrodes, and a method for producing the same. Petroleum pitch having a quinoline-insoluble fraction (QI) of 0.5 mass% or less, a toluene-insoluble fraction (TI) of 3.0 mass% or less, a softening point of 60-120°C, and a viscosity at 200°C of 200 mPa∙s or less, the fixed carbon content Y (mass%) of which satisfies formula (1). A method for producing petroleum pitch comprising: a step for heat-treating petroleum heavy oil (step 1); a step for distilling the heat-treated product obtained in step 1 and obtaining a pitch 1 as a high-boiling-point component (step 2); a step for removing the toluene-insoluble fraction (TI) from the pitch 1 obtained in step 2 and obtaining a component in which the toluene-insoluble fraction (TI) has been decreased (step 3), and a step for distilling the component in which the toluene-insoluble fraction (TI) obtained in step 3 has been decreased and obtaining a pitch 2 as a high-boiling-point component (step 4). 80.0 ≥ Y > 0.2X + 29.5 (1) Y: fixed carbon content (mass%), X: softening point (°C) (60 ≤ X ≤ 120)
Inventors:
ISHIKAWA YUTARO (JP)
NISHI NOBUHIRO (JP)
OTA KEISUKE (JP)
NISHI NOBUHIRO (JP)
OTA KEISUKE (JP)
Application Number:
PCT/JP2023/015323
Publication Date:
December 07, 2023
Filing Date:
April 17, 2023
Export Citation:
Assignee:
RESONAC CORP (JP)
International Classes:
C10C3/02; C01B32/00; C08L95/00; C10C1/16
Domestic Patent References:
| WO2021181905A1 | 2021-09-16 | |||
| WO2022049953A1 | 2022-03-10 |
Foreign References:
| JP2018053071A | 2018-04-05 | |||
| JPH10316972A | 1998-12-02 | |||
| JP2021080143A | 2021-05-27 |
Attorney, Agent or Firm:
AOKI, Atsushi et al. (JP)
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