A preparation method of high modulus carbon fiber and its precursor mesophase pitch
A technology of mesophase pitch and carbon fiber is applied in the field of preparation of high modulus carbon fiber and its precursor mesophase pitch, which can solve the problems of high energy consumption and complicated pretreatment process, and achieves low energy consumption, good spinnability, softening low point effect
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[0030] In one or more examples of this embodiment, a more specific technical solution is provided. The preparation method of the mesophase pitch and the high modulus carbon fiber includes the following specific steps:
[0031] Take a certain quality of heavy oil as a raw material, use flushing agent as a solvent to form a solution with a mass fraction of 5%, add this solution to a chromatographic column equipped with polystyrene packing, and carry out size exclusion chromatography separation. The gel column diameter of size exclusion chromatography is 50-100mm, the height is 800-1000mm, and the packing pore diameter The top of the column layer is pressurized to collect the effluent oil; the effluent oil is sequentially passed through the large-pore cation exchange resin made by introducing sulfonic acid groups and the large-pore anion exchange resin made by introducing quaternary ammonium groups. Resin is separated by ion exchange chromatography, the packed column of the ion ...
Embodiment 1
[0037] (1) Get 20g catalytic cracking oil slurry, adopt tetrahydrofuran to be made into the solution that mass fraction is 5% as solvent, join this solution in the chromatographic column that polystyrene is housed, gel column diameter 50-100mm, height 800- 1000mm, packing hole diameter The top of the column layer is pressurized to collect the effluent oil; the effluent oil is added to the cation exchange resin filler (with styrene-diethylene copolymer as the skeleton, introducing sulfonic acid group) and anion exchange resin filler (with styrene-diethylene copolymer) respectively. The ethylene copolymer is the skeleton, introduced into the chromatographic column of quaternary amino group), the diameter of the packed column is 10-20mm, and the height is 500-1000mm, and the effluent oil is collected. Add the effluent oil into the autoclave, replace the air with nitrogen for 3 times, then raise the pressure to 4MPa with nitrogen, raise the temperature to 430°C, and heat-treat fo...
Embodiment 2
[0039] (1) get 20g atmospheric residual oil, adopt hexanaphthene to be made into the solution that mass fraction is 5% as solvent, this solution joins in the chromatographic column that polystyrene filler is housed, gel column diameter 50-100mm, Height 800-1000mm, filler hole diameter The top of the column layer is pressurized to collect the effluent oil; the effluent oil is added to the cation exchange resin (with polystyrene as the skeleton, introducing sulfonic acid groups) and anion exchange resin packing (with polystyrene as the skeleton, introducing quaternary ammonium) respectively. In the chromatographic column of base), the gel column diameter is 10-20mm, the height is 500-1000mm, and the effluent oil is collected. Add the effluent oil into the high-pressure reaction kettle, replace the air with nitrogen for 3 times, then introduce nitrogen to raise the pressure to 5MPa, raise the temperature to 440°C, and heat-treat for 8 hours under constant stirring. During the re...
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