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AssigneeToyo Engineering Corporation
InventorsKeisuke SASAKURA, Taisei YAMAMOTO, Shoichi YAMAGUCHI
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To provide a process for separating hydrocarbons capable of recovering ethane or propane, including improved cold heat recovery enabling a reduction in compressor power. A process for separating hydrocarbons, in which a residual gas enriched with methane or ethane and a heavy fraction enriched with a lower volatile hydrocarbon are separated, includes: a) partially condensing the feed gas by cooling using the residual gas and another refrigerant as a refrigerant, followed by vapor-liquid separation; b) depressurizing and supplying the liquid obtained from step (a) to the distillation column; c) expanding a part or all of the gas obtained from step (a) by an expander to cause partial condensation, followed by vapor-liquid separation; d) feeding the liquid obtained from step (c) to the distillation column after using it as the further refrigerant in step (a); e) feeding a part or all of the gas obtained from step (c) to the distillation column; and f) obtaining the residual gas from the top of the distillation column and the heavy fraction from the bottom of the distillation column.
A process for separating hydrocarbons, wherein a feed gas containing at least methane and a hydrocarbon less volatile than methane is separated into a residual gas enriched with methane and lean in a hydrocarbon less volatile than methane and a heavy fraction lean in methane and enriched with a hydrocarbon less volatile than methane using a distillation column, the process comprising:
A process for separating hydrocarbons, wherein a feed gas containing at least ethane and a hydrocarbon less volatile than ethane is separated into a residual gas enriched with ethane and lean in a hydrocarbon less volatile than ethane and a heavy fraction lean in ethane and enriched with a hydrocarbon less volatile than ethane using a distillation column, the process comprising:
A separation apparatus for hydrocarbons, wherein a feed gas containing at least methane and a hydrocarbon less volatile than methane is separated into a residual gas enriched with methane and lean in a hydrocarbon less volatile than methane and a heavy fraction lean in methane and enriched with a hydrocarbon less volatile than methane, the separation apparatus comprising:
A separation apparatus for hydrocarbons, wherein a feed gas containing at least ethane and a hydrocarbon less volatile than ethane is separated into a residual gas enriched with ethane and lean in a hydrocarbon less volatile than ethane and a heavy fraction lean in ethane and enriched with a hydrocarbon less volatile than ethane, the separation apparatus comprising:
Dependencies are inferred from the claim text.