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Process and apparatus for fractionating close boiling components of a multi-component system

  • US 4,315,802 A
  • Filed: 05/12/1980
  • Issued: 02/16/1982
  • Est. Priority Date: 05/12/1980
  • Status: Expired due to Term
First Claim
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1. In an apparatus for fractionating close-boiling components of a multi-component system in a plurality of fractionation columns wherein there are at least two of said columns in series, said plurality of columns being of like operating pressures, wherein a conduit for liquid is provided for passing a liquid bottoms from a penultimate fractionation column to an upper portion of the last fractionation column of said series and wherein a conduit for vapor is provided for withdrawing a vapor stream from the upper portion of said last fractionation column and wherein a higher boiling component of said multi-component system is withdrawn as a liquid from said last fractionation column and wherein a lower boiling component of said multi-component system is withdrawn as a vapor, an improved apparatus which comprises:

  • means for eliminating the requirement for a pump, comprising a first conduit having an orifice therein, for feeding from the bottom of said first column;

    aid orifice being sized, and spaced sufficiently below said bottom to provide self venting; and

    means for eliminating the requirement of a reboiler in said first column, comprising a second conduit having a compressor therein for feeding from the top of said last column to the bottom of said first column.

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