Process for the production of carbonaceous pitch
    5.
    发明授权
    Process for the production of carbonaceous pitch 失效
    生产碳质沥青的方法

    公开(公告)号:US4663022A

    公开(公告)日:1987-05-05

    申请号:US815923

    申请日:1986-01-03

    CPC分类号: C10G51/023 C10G55/04

    摘要: A continuous process for the production of carbonaceous pitch, including heat-treating an aromatic heavy oil in a first thermal cracking zone for obtaining a first cracked product, and introducing the first cracked product into a second thermal cracking zone where it is thermally cracked by direct contact with a gaseous heat transfer medium to form distillable cracked components and a mesophase-containing pitch. The liquid phase in the second thermal cracking zone, including the mesophase-containing pitch, is discharged therefrom and separated into a mesophase-rich pitch and a matrix pitch having a low concentration of mesophase. The mesophase-rich pitch is recovered while at least a portion of the matrix pitch is recycled to the second thermal cracking zone. The distillable cracked components are stripped from the liquid phase in the second thermal cracking zone with the heat transfer medium, and the resulting gas phase is withdrawn overhead therefrom and then separated into a light fraction and a heavy fraction. The heavy fraction is fed to the first thermal cracking zone.

    摘要翻译: 一种用于生产碳质沥青的连续方法,包括在第一热裂解区中热处理芳族重油以获得第一裂化产物,并将第一裂化产物引入第二热裂解区,其中它通过直接 与气体传热介质接触以形成可蒸馏的裂化组分和含中间相沥青。 包括含中间相沥青的第二热裂解区中的液相从其中排出并分离成富含中间相的沥青和具有低浓度中间相的基体沥青。 回收富含中间相沥青,而将至少一部分基质沥青再循环至第二热裂解区。 在第二热裂解区用传热介质从馏出的液相中蒸馏出馏出的裂化组分,将所得气相从塔顶馏出,然后分离成轻馏分和重馏分。 重馏分被送入第一热裂解区。