F - Mech Eng,Light,Heat,Weapons – 25 – J
Patent
F - Mech Eng,Light,Heat,Weapons
25
J
162/113
F25J 3/02 (2006.01) C07C 7/00 (2006.01) C07C 7/04 (2006.01)
Patent
CA 1249769
Separating Hydrocarbon Gases Abstract The present invention relates to a process for separating a hydrocarbon gas into a fraction contain- ing a predominant portion of the ethane and lighter components and a fraction containing a predominant portion of the C3 and heavier components in which process the feed gas is treated in one or more heat exchange, and expansion steps to provide a partly condensed hydrocarbon gas comprising a first residue vapor and a C3-containing liquid which liquid also contains lighter hydrocarbons; the partly condensed feed gas is directed into a separator wherein the first residue vapor is separated from the C3-contain- ing liquid; and the C3-containing liquids, at substan- tially the pressure of separation, are directed into a distillation column wherein said liquid is separated into a second residue containing lighter hydrocarbons and a C3-containing product. In accordance with the present invention the foregoing process is improved by cooling said second residue to partially condense it; directing the partially condensed second residue into said separator forming thereby a liquid portion and a vapor portion; intimately contacting at least the first residue vapor with at least the liquids portion of the partly condensed second residue in at least one contacting stage within said separator, and thereafter separating the vapors and liquids from said contacting stage; supplying the liquids thereby recovered to the distillation column as a top liquid feed thereto: and directing the vapors thereby recovered into heat exchange relation with said second residue from the fractionation column, thereby to partly condense the second residue, and thereafter discharging said residue gases.
495555
Elkcorp
Gowling Lafleur Henderson Llp
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