EP 3727649 A1 20201028 - CRYOGENIC PROCESS FOR REMOVING NITROGEN FROM A DISCHARGE GAS
Title (en)
CRYOGENIC PROCESS FOR REMOVING NITROGEN FROM A DISCHARGE GAS
Title (de)
KRYOGENES VERFAHREN ZUR ENTFERNUNG VON STICKSTOFF AUS EINEM ENTLADUNGSGAS
Title (fr)
PROCÉDÉ CRYOGÉNIQUE DE DÉAZOTATION D'UN GAZ DE DÉCHARGE
Publication
Application
Priority
- FR 1762858 A 20171221
- FR 2018053338 W 20181217
Abstract (en)
[origin: WO2019122660A1] A process for producing biomethane (40) by purification of a biogas feed stream (1), comprising the following steps: Step a): introduction of the feed gas stream (1) into a pretreatment unit (5) in which said gas stream is partially separated from the CO2 and the oxygen that it contains and is compressed at a pressure P1 greater than 50 bar abs; Step b): the gas stream to be treated (22) resulting from step a), depleted of CO2, is subjected to cryogenic separation by introducing it into a distillation column (26) in order to separate the nitrogen from said gas stream to be treated; Step c): a stream (27) enriched with CH4 resulting from the cryogenic separation is recovered by pumping the bottom product (37) of said column (26) at a pressure P2 greater than the critical pressure of said product, characterized in that said gas stream resulting from step a), depleted of CO2 , used in step b) comprises between 0.3 mol% and 2 mol% of CO2.
IPC 8 full level
B01D 53/22 (2006.01); B01D 53/04 (2006.01); B01D 53/047 (2006.01); F25J 3/02 (2006.01)
CPC (source: EP KR US)
B01D 53/0462 (2013.01 - EP KR); B01D 53/047 (2013.01 - EP KR); B01D 53/225 (2013.01 - EP KR); B01D 53/229 (2013.01 - EP KR); F25J 3/0209 (2013.01 - EP KR US); F25J 3/0233 (2013.01 - EP KR US); F25J 3/0257 (2013.01 - EP KR US); F25J 3/0266 (2013.01 - US); B01D 2256/245 (2013.01 - EP KR); B01D 2257/102 (2013.01 - EP KR); B01D 2257/104 (2013.01 - EP KR); B01D 2257/30 (2013.01 - EP KR); B01D 2257/504 (2013.01 - EP KR); B01D 2257/708 (2013.01 - EP KR); B01D 2257/80 (2013.01 - EP KR); B01D 2258/05 (2013.01 - EP KR); B01D 2259/416 (2013.01 - EP KR); F25J 2200/02 (2013.01 - EP KR); F25J 2200/04 (2013.01 - US); F25J 2200/72 (2013.01 - EP KR US); F25J 2205/60 (2013.01 - EP KR); F25J 2205/80 (2013.01 - EP KR); F25J 2210/04 (2013.01 - EP KR); F25J 2210/42 (2013.01 - EP KR US); F25J 2210/66 (2013.01 - EP KR US); F25J 2210/80 (2013.01 - US); F25J 2220/60 (2013.01 - EP KR); F25J 2220/62 (2013.01 - EP KR US); F25J 2220/66 (2013.01 - EP KR); F25J 2230/30 (2013.01 - EP KR US); F25J 2235/60 (2013.01 - EP KR US); F25J 2270/42 (2013.01 - EP KR); F25J 2270/60 (2013.01 - EP KR); F25J 2290/90 (2013.01 - EP KR); Y02C 20/40 (2020.08 - EP); Y02E 50/30 (2013.01 - EP)
Citation (search report)
See references of WO 2019122660A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
WO 2019122660 A1 20190627; CA 3085235 A1 20190627; CN 111565821 A 20200821; EP 3727649 A1 20201028; FR 3075659 A1 20190628; FR 3075659 B1 20191115; KR 20200096541 A 20200812; US 2021172677 A1 20210610
DOCDB simple family (application)
FR 2018053338 W 20181217; CA 3085235 A 20181217; CN 201880079693 A 20181217; EP 18839833 A 20181217; FR 1762858 A 20171221; KR 20207017512 A 20181217; US 201816954753 A 20181217