公开(公告)号：US20180186632A1

公开(公告)日：2018-07-05

申请号：US15741187

申请日：2016-06-29

Applicant: Linde Aktiengesellschaft

Inventor： Tuat PHAM DUC ,  Paul KUHN

IPC: C01B3/56 ,  C01B3/50 ,  C01B3/52 ,  F25J3/02 ,  B01D53/047 ,  B01D53/14 ,  B01D53/18 ,  B01D53/00

CPC classification number: C01B3/56 ,  B01D53/002 ,  B01D53/047 ,  B01D53/1431 ,  B01D53/18 ,  C01B3/506 ,  C01B3/52 ,  C01B2203/0415 ,  C01B2203/042 ,  C01B2203/043 ,  C01B2203/048 ,  C01B2203/147 ,  F25J3/0219 ,  F25J3/0238 ,  F25J3/0252 ,  F25J2200/70 ,  F25J2205/02 ,  F25J2205/04 ,  F25J2205/30 ,  F25J2205/40 ,  F25J2205/60 ,  F25J2210/12 ,  F25J2215/62 ,  F25J2230/08 ,  F25J2230/60 ,  F25J2245/02 ,  F25J2270/02

Abstract: A method (100, 200) is proposed for obtaining hydrogen from a gaseous feed mixture rich in hydrogen, methane and hydrocarbons having two carbon atoms, wherein fluid of the feed mixture is cooled from a first temperature level to a second temperature level at a first pressure level such that one or more condensates are precipitated out of the fluid of the feed mixture, leaving a residual gas, fluid of the residual gas is further cooled to a third temperature level and subjected to a counterflow absorption at the first pressure level, thereby obtaining a top gas rich in hydrogen and methane and a sump liquid, fluid of the top gas is heated and subjected to pressure swing adsorption (9) at the first pressure level, to form a product stream which is rich in hydrogen and depleted in or free from methane, and fluid of the condensate or condensates and/or of the sump liquid is expanded from the first pressure level to a second pressure level and is fed into a low pressure demethanizer at the second pressure level. It is provided that the counterflow absorption is carried out using fluid which is taken from the low pressure demethanizer at the second pressure level, compressed in gaseous form to the first pressure level and cooled to the third temperature level. The invention also relates to a corresponding apparatus.