Title:
REACTION SYSTEM AND METHOD FOR PREPARING HIGH-QUALITY MESOPHASE PITCH AND CO-PRODUCING SPINNABLE ISOTROPIC PITCH
Document Type and Number:
WIPO Patent Application WO/2023/169486
Kind Code:
A1
Abstract:
The invention relates to a reaction system and method for preparing a high-quality mesophase pitch and co-producing a spinnable isotropic pitch. Catalytically or thermally cracked tar, FCC oil slurry clarified oil, fourth vacuum cut, deasphalted oil of naphthenic vacuum residue, QI-removed refined coal tar and anthracene oil are used as raw materials; a centrifugal reaction-separation device is used, and by means of alternate vertical and inclined rotation operations of a reaction sleeve twice to three times, raw materials in the reaction sleeve are uniformly heated for a condensation polymerization reaction, and mesophase products are enriched at the lower part of the reaction sleeve; and the molecular weight of the products is adjusted by matching the opening and closing of valves at the bottom of the sleeve and at the bottom of a device cavity with flash tanks, such that a high-quality mesophase pitch having a yield of 30-50% and a softening point of 220-300ºC and capable of realizing the continuous spinning of filaments that measure ten thousand meters or more, and a spinnable isotropic pitch having a yield of 40-50% and a softening point of 200-280ºC can be obtained separately. In the present invention, the problems of non-uniform material heating and long reaction and separation process are effectively solved, and a mesophase pitch and an isotropic pitch for high-quality spinning can be co-produced.
Inventors:
LOU BIN (CN)
LIU DONG (CN)
SHI NAN (CN)
WEN FUSHAN (CN)
LIU DONG (CN)
SHI NAN (CN)
WEN FUSHAN (CN)
Application Number:
PCT/CN2023/080367
Publication Date:
September 14, 2023
Filing Date:
March 09, 2023
Export Citation:
Assignee:
UNIV CHINA PETROLEUM (CN)
International Classes:
C10C1/04; C10C1/20; C10C3/06
Domestic Patent References:
| WO1989000618A2 | 1989-01-26 | |||
| WO2017086985A1 | 2017-05-26 |
Foreign References:
| CN114479895A | 2022-05-13 | |||
| CN215312409U | 2021-12-28 | |||
| CN112852464A | 2021-05-28 | |||
| CN113680301A | 2021-11-23 | |||
| CN113549466A | 2021-10-26 | |||
| CN109504417A | 2019-03-22 | |||
| EP0318843A1 | 1989-06-07 | |||
| US9376626B1 | 2016-06-28 |
Attorney, Agent or Firm:
QINGDAO GAOXIAO PATENT AGENCY (GENERAL PARTNERSHIP) (CN)
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