Lights Removal From Carbon Dioxide

    公开(公告)号:US20210131727A1

    公开(公告)日:2021-05-06

    申请号:US16670281

    申请日:2019-10-31

    IPC分类号: F25J3/02

    摘要: Light gases such as helium are extacted from a carbon dioxide-containing feed stream by distillation. Costly dehydration steps are avoided by pumping the liquid bottoms stream leaving the distillation column without vaporization so as to ensure that any water present in the feed remains in solution with the bulk stream leaving the process. This prevents any liquid phase water causing corrosion or solid ice or hydrates forming to plug the flow.

    Purification of carbon dioxide
    3.
    发明授权

    公开(公告)号:US10655912B2

    公开(公告)日:2020-05-19

    申请号:US14521062

    申请日:2014-10-22

    摘要: Impurities that are less volatile than carbon dioxide, e.g. hydrogen sulfide, are removed from crude carbon dioxide by processes involving distillation of said crude carbon dioxide in a distillation column system operating at super-atmospheric pressure(s) to produce carbon dioxide-enriched overhead vapor and bottoms liquid enriched with said impurities. Where such processes involve a single heat pump cycle, significant savings in power consumption are realized when the distillation column system is re-boiled by at least partially vaporizing liquid in or taken from an intermediate location in the column system.