Patent ID: 6735979
Filing Date: 2004-05-18
Classification: B01D,Y10S

Abstract:
A process for pretreating a natural gas under pressure containing hydrocarbons, at least one of the acid compounds hydrogen sulfide and carbon dioxide, and water, comprising the stages of:a) cooling the natural gas to produce a liquid phase and a gas phase, b) contacting the gas phase obtained in stage a) in a distillation column with a liquid phase obtained in stage c) to produce a gas phase and a liquid phase, and c) cooling the gas phase obtained in stage b) to produce a liquid phase and a gas phase, wherein the operating conditions are as follows:Distillation column in stage b) TÂ° C. =âˆ’20Â° C. to 100Â° C. P>I MPa abs. Pressure and cooling temperature in stage c) TÂ° C. =âˆ’100Â° C. to +Â° C. P>1 MPa, Temperature to which said natural gas is cooled in stage a) 0 to 50Â° C.