EP 1082577 A1 20010314 - METHOD FOR EXTRACTING XENON
Title (en)
METHOD FOR EXTRACTING XENON
Title (de)
VERFAHREN ZUR XENONGEWINNUNG
Title (fr)
PROCEDE D'EXTRACTION DE XENON
Publication
Application
Priority
- DE 19823526 A 19980526
- EP 9903079 W 19990505
Abstract (en)
[origin: WO9961853A1] The invention relates to a method for extracting xenon and eventually also krypton from a liquid oxygen (LOX) charge, as it accrues in a cryogenic air separation system (LZA) during a rectification of the air, mostly as a bottom product of a low-pressure column, namely with xenon (Xe), krypton (Kr) and hydrocarbons (CxHy) in a small concentration and approximately 99 mol % oxygen (O2). According to the inventive method, the LOX charge is fed to a first column, the oxygen of the LOX charge is extensively removed by stripping with an inert gas, and is extracted in the top gas, whereas the inert gas is withdrawn in the form of a liquid from the bottom of the first column with little O2 and nearly the total mass of CxHy, Kr, Xe. According to the invention, the liquid discharge is fed to a second column without prior catalytic and/or adsorptive removal of CxHy. A Kr fraction is extracted as top gas of the second column, and an Xe fraction is withdrawn from the bottom of the second column. The method can be used in a device for extracting Xe and/or Kr in an air separation system (LZA). The device can be arranged in a transportable container.
IPC 1-7
IPC 8 full level
CPC (source: EP US)
F25J 3/028 (2013.01 - EP US); F25J 3/04745 (2013.01 - EP US); F25J 3/04751 (2013.01 - EP US); F25J 2200/32 (2013.01 - EP US); F25J 2200/34 (2013.01 - EP US); F25J 2205/30 (2013.01 - EP US); F25J 2210/42 (2013.01 - EP US); F25J 2210/50 (2013.01 - EP US); F25J 2215/34 (2013.01 - EP US); F25J 2215/36 (2013.01 - EP US); F25J 2245/42 (2013.01 - EP); Y10S 62/925 (2013.01 - EP US)
Citation (search report)
See references of WO 9961853A1
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
WO 9961853 A1 19991202; AT E215211 T1 20020415; CN 1136427 C 20040128; CN 1305578 A 20010725; DE 19823526 C1 20000105; DE 59901070 D1 20020502; EP 1082577 A1 20010314; EP 1082577 B1 20020327; NO 20005955 D0 20001124; NO 20005955 L 20001124; PL 344242 A1 20011008; SI 20486 A 20010831; TW 453975 B 20010911; US 6351970 B1 20020305; ZA 200007750 B 20011112
DOCDB simple family (application)
EP 9903079 W 19990505; AT 99922180 T 19990505; CN 99806566 A 19990505; DE 19823526 A 19980526; DE 59901070 T 19990505; EP 99922180 A 19990505; NO 20005955 A 20001124; PL 34424299 A 19990505; SI 9920039 A 19990505; TW 88108541 A 19990525; US 70124001 A 20010222; ZA 200007750 A 20001221