公开(公告)号：US20200224968A1

公开(公告)日：2020-07-16

申请号：US16628955

申请日：2018-07-06

Applicant: LINDE AKTIENGESELLSCHAFT

Inventor： Tuat PHAM DUC ,  Torben HÖFEL

IPC: F25J3/02 ,  C01B3/50 ,  B01D5/00 ,  C07C7/00 ,  C07C7/04 ,  C07C7/09

Abstract: The present invention relates to a process (100) for separatory processing of a starting mixture containing predominantly hydrogen, methane and hydrocarbons having two or two or more carbon atoms, wherein at least a portion of the starting mixture is cooled to form one or more condensates using one or more heat exchangers (101, 103, 105, 107) and at least a portion of the condensate(s) is subjected to a rectification to form a gaseous methane-rich fraction. It is provided that the gaseous methane-rich fraction is used to form a first fluid stream which is at least partly compressed, in an unchanged composition with respect to the gaseous methane-rich fraction, to a liquefaction pressure level of 35 to 45 bar, and at least partly liquefied by cooling, and in that the first fluid stream, or a second fluid stream formed using the first fluid stream, is expanded to a delivery pressure and heated in the or at least one of the heat exchanger(s) (101, 103, 105, 107). A corresponding plant likewise forms part of the subject matter of the invention.

公开(公告)号：US20210284589A1

公开(公告)日：2021-09-16

申请号：US16325058

申请日：2017-08-14

Applicant: LINDE AKTIENGESELLSCHAFT

Inventor： Tuat PHAM DUC ,  Anne SPINDELNDREHER ,  Benedikt KURZ

IPC: C07C7/00 ,  C07C7/04 ,  C07C7/09 ,  C07C7/11

Abstract: The invention relates to a method (100) for the recovery of a separation product which contains predominantly hydrocarbons with two carbon atoms, with the use of a separation feedstock which contains predominantly methane, hydrogen and hydrocarbons with two carbon atoms, wherein the methane content of the separation feedstock is up to 20%, and the separation feedstock is provided in a gaseous state. It is provided that, at a first pressure level, the separation feedstock is partially condensed in a single step by cooling from a first temperature level to a second temperature level, thereby obtaining precisely one first liquid fraction and precisely one first gaseous fraction; at least one part of the first gaseous fraction is partially condensed in a single step through further cooling from the second temperature level to a third temperature level, thereby obtaining precisely one second liquid fraction and precisely one second gaseous fraction; at least one part of the second gaseous fraction at the second pressure level is subjected to a contraflow absorption in the contraflow to an absorption liquid containing predominantly methane, thereby obtaining precisely one third liquid fraction and precisely one third gaseous fraction; the first, the second and the third liquid fraction are at least partially combined and, at least partially, at a second pressure level above the first pressure level, subjected to a low-temperature rectification, thereby obtaining a sump liquid and an overhead gas; at least one part of the overhead gas at the second pressure level is partially condensed in a single step through further cooling from the second temperature level to the third temperature level, thereby obtaining a fourth liquid fraction and a fourth gaseous fraction; and the absorption liquid containing predominantly methane is formed through further cooling of at least a part of the fourth gaseous fraction to a fourth temperature level. A corresponding plant also forms the subject matter of the invention.

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.