Preparation of mesophase pitch by in-process hydrogenation technology
Mesophase pitch was prepared from FCC aromatic-rich oil by in-process hydrogenation.The influence of hydrogenation agent addition on the formation and development of mesophase structure was investigated.Results show that mesophase pitch produced by two-stage hydrogenation possesses higher anisotropic content and better microcrystalline structure.However,more hydrogenation times will lead to low content of mesophase and more microcrystal defect structure.The optical anisotropic structure and microcrystal structure of mesophase pitch could be improved by moderating in-process hydrogenation effectively.
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