Title:
LOW-COST METHOD FOR PREPARING SPINNABLE MESOPHASE PITCH
Document Type and Number:
WIPO Patent Application WO/2023/169604
Kind Code:
A1
Abstract:
The present invention relates to a low-cost method for preparing spinnable mesophase pitch. Using an aromatic hydrocarbon-rich fuel oil as a raw oil, preheated fresh raw oil is mixed with nitrogen gas, and then enters from an upper end of a variable-temperature variable-diameter tubular reactor and quickly passes through said reactor to obtain a pitch-like intermediate product having a softening point of 40-160 °C; then, same enters into a hot low pressure separation tank, nitrogen gas and a portion of light components are separated out at a top part of the hot low pressure separation tank, and a bottom product enters into a wiped film evaporator to remove and recover a light component, and a heavy component obtained at the bottom of the evaporator enters an mesophase storage tank, thereby obtaining high-quality spinnable mesophase pitch; a distillate greater than or equal to 200 °C among the nitrogen gas and the light component recovered by the hot low pressure separation tank and the wiped film evaporator is mixed and preheated, and same enters the reactor from a middle variable-diameter area of the reactor to carry out a cyclical reaction, so as to improve the conversion rate of mesophase pitch produced by raw oil. Low-cost, large-scale production of high-quality mesophase pitch can be achieved by means of a continuous-type rapid and cyclical reaction mode and a production system.
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Inventors:
LOU BIN (CN)
LIU DONG (CN)
LIU DONG (CN)
Application Number:
PCT/CN2023/092544
Publication Date:
September 14, 2023
Filing Date:
May 06, 2023
Export Citation:
Assignee:
UNIV CHINA PETROLEUM (CN)
International Classes:
C10C1/04
Foreign References:
| CN113680301A | 2021-11-23 | |||
| US20090321313A1 | 2009-12-31 | |||
| CN114410331A | 2022-04-29 |
Attorney, Agent or Firm:
QINGDAO GAOXIAO PATENT AGENCY (GENERAL PARTNERSHIP) (CN)
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