| abstract |
A process for the recovery of ethane, ethylene, propane, propylene and heavier hydrocarbons from a stream of liquefied natural gas (LNG) and a stream of hydrocarbon gas is described. The LNG feed stream is divided into two parts. The first portion is supplied to a fractionation column at a feed point of the upper middle column. The second portion is directed in relation to the exchange of heat with a first portion of hotter distillation stream that ascends from the column fractionation stages; The LNG feed stream is partially heated and the distillation stream condenses completely. The condensed distillation stream is divided into a "lean" LNG stream and a reflux stream, whereby the reflux stream is supplied to the column in an upper column feed position. The second portion of the LNG feed stream is heated. additionally to partially or fully vaporize it and, subsequently, it is supplied to the column in a first lower middle column feed position. |