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    Distillative separations of gas mixtures containing methane, carbon dioxide and other components
    4.
    发明授权
    Distillative separations of gas mixtures containing methane, carbon dioxide and other components 失效
    包含甲烷，二氧化碳和其他组分的气体混合物的蒸馏分离

    公开(公告)号：US4462814A

    公开(公告)日：1984-07-31

    申请号：US476520

    申请日：1983-03-18

    申请人： Arthur S. Holmes ,  James M. Ryan

    发明人： Arthur S. Holmes ,  James M. Ryan

    IPC分类号： B01D3/14 ,  B01D3/32 ,  B01D3/34 ,  C01B17/16 ,  C01B32/50 ,  C07C7/05 ,  C07C7/20 ,  F25J3/02 ,  F25J3/08 ,  F25J3/04

    CPC分类号： F25J3/0266 ,  B01D3/146 ,  B01D3/322 ,  B01D3/34 ,  C01B17/167 ,  C01B17/168 ,  C01B31/20 ,  C07C7/05 ,  C07C7/20 ,  F25J3/0209 ,  F25J3/0233 ,  F25J3/0238 ,  F25J3/0247 ,  F25J2205/50 ,  F25J2220/66 ,  F25J2245/02 ,  Y02C10/12 ,  Y02P20/152 ,  Y10S62/929

    摘要： Distillative separations of hydrocarbon feed mixtures containing at least methane and carbon dioxide, as well as other components, such as ethane, higher hydrocarbons, and hydrogen sulfide are disclosed. In the separations described, methane is preferably separated from an acid gas under conditions of composition, temperature and pressure which would normally produce acid gas solids. Acid gas solids are prevented by adding a liquid solids-preventing agent into this distillation column. A second distillation column is subsequently employed to further separate the feed gas mixture. The second distillation column is operated under conditions which an azeotrope would normally form between the light hydrocarbon and carbon dioxide, which azeotrope would limit the carbon dioxide overhead composition. The azeotrope is prevented by introducing an agent for preventing azeotrope formation. Alternatively, the second distillation column may be operated to separate carbon dioxide from hydrogen sulfide. In this case, a liquid agent is added to the second distillation column to increase the relative volatility of carbon dioxide to hydrogen sulfide. All liquid agents preferably comprise a C.sub.3 -C.sub.6 alkane, such as butane, or a mixture of such alkanes.

    摘要翻译： 公开了至少含有甲烷和二氧化碳的烃进料混合物以及其它组分如乙烷，高级烃和硫化氢的蒸馏分离。 在所述的分离中，优选在通常产生酸性气体固体的组成，温度和压力的条件下将甲烷与酸性气体分离。 通过向该蒸馏塔中加入液体固体防​​止剂来防止酸性气体固体。 随后采用第二蒸馏塔进一步分离进料气体混合物。 第二蒸馏塔在通常在轻烃和二氧化碳之间形成共沸物的条件下操作，共沸物将限制二氧化碳塔顶组合物。 通过引入防止共沸物形成的试剂来防止共沸物。 或者，可以操作第二蒸馏塔以将二氧化碳与硫化氢分离。 在这种情况下，向第二蒸馏塔中加入液体试剂以提高二氧化碳相对于硫化氢的相对挥发度。 所有液体剂优选包含C 3 -C 6烷烃，例如丁烷，或这些烷烃的混合物。