公开(公告)号：DE19933301A1

公开(公告)日：2001-01-18

申请号：DE19933301

申请日：1999-07-15

Applicant: BASF AG

Inventor： HUGO RANDOLF ,  WAGNER RUPERT ,  HOLST THOMAS ,  GROSMANN CHRISTOPH

IPC: B01D53/14 ,  C10L3/10 ,  C07C319/28 ,  C07C215/10 ,  C07D295/00

Abstract: The invention relates to a method for removing mercaptans from fluid fluxes containing mercaptans, in particular from hydrocarbon gases, such as natural gas, synthesis gas from heavy oil or heavy residues or refinery gas, or also from liquid hydrocarbons, for example, LPG (liquefied petroleum gas). According to the invention, a fluid flux of this type is brought into contact with a washing solvent in an absorption or extraction zone. Said solvent contains at least one aliphatic alkanolamine which has 2 - 12 C-atoms. Enough washing solvent is supplied to the absorption or extraction zone to more or less completely eliminate at least CO2 and H2S from the fluid flux. The substantially purified fluid flux is subsequently separated from the charged washing solvent and both the fluid flux and the washing solvent are evacuated from the absorption zone. The major part of the mercaptans are removed from the gas flux by the more or less complete removal of CO2 and H2S, without a notable portion of the hydrocarbon gases dissolving in the washing solvent.