Title:
PREPARATION METHODS FOR MESOPHASE PITCH AND HIGH MODULUS PITCH-BASED CARBON FIBER
Document Type and Number:
WIPO Patent Application WO/2021/232561
Kind Code:
A1
Abstract:
The present invention relates to the technical field of the preparation of advanced novel carbon materials. Provided are preparation methods for mesophase pitch and a high modulus pitch-based carbon fiber. The present methods comprise: treating heavy oil by means of liquid-solid adsorption chromatography (LSAC) and gel permeation chromatography (GPC) to obtain a modified raw material having a proper molecular weight and polarity; then performing thermal polycondensation on the modified raw material for 1-15 hours at the reaction temperature of 360-480°С and under the reaction pressure of 0-10 MPa to prepare high-quality mesophase pitch; and performing melt spinning on the mesophase pitch, and performing pre-oxidation, carbonization and graphitization treatment to obtain the high modulus pitch-based carbon fiber. The methods of the present invention are strong in raw material compatibility; the obtained mesophase pitch is excellent in quality, the mesophase content of the mesophase pitch is greater than or equal to 97%, and the softening point of the mesophase pitch is 170-350°С; the mesophase pitch has a large-area wide-area streamline optically anisotropic structure, and is good in spinnability and suitable for preparing a high modulus mesophase pitch-based carbon fiber.
Inventors:
LIU DONG (CN)
LOU BIN (CN)
YU RAN (CN)
GONG XIN (CN)
DU HUI (CN)
LOU BIN (CN)
YU RAN (CN)
GONG XIN (CN)
DU HUI (CN)
Application Number:
PCT/CN2020/101358
Publication Date:
November 25, 2021
Filing Date:
July 10, 2020
Export Citation:
Assignee:
UNIV CHINA PETROLEUM (CN)
International Classes:
C10G55/00; C10C3/00; D01F9/145
Foreign References:
| CN104004536A | 2014-08-27 | |||
| CN106544758A | 2017-03-29 | |||
| CN104610994A | 2015-05-13 | |||
| CN105256409A | 2016-01-20 | |||
| CN106398736A | 2017-02-15 | |||
| US4528087A | 1985-07-09 | |||
| JPH03149292A | 1991-06-25 |
Other References:
YNAG HUI, LIANG PENG;SONG HUAI-HE;MA ZHAO-KUN;CHEN XIAO-HONG;ZHU YU-FEI;LIU JUN-QING;: "Preparation of mesophase pitch from coal hydroliquefaction residue", CARBON TECHNIQUES, vol. 33, no. 5, 28 October 2014 (2014-10-28), pages 26 - 30, XP055869493, ISSN: 1001-3741, DOI: 10.14078/j.cnki.1001-3741.2014.05.026
XIA, ZHINING ET AL.: "Size Exclusion Chromatography", CHROMATOGRAPHY, 30 September 2012 (2012-09-30)
XIA, ZHINING ET AL.: "Size Exclusion Chromatography", CHROMATOGRAPHY, 30 September 2012 (2012-09-30)
Attorney, Agent or Firm:
QINGDAO GAOXIAO PATENT AGENCY (GENERAL PARTNERSHIP) (CN)
Download PDF: