| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_3d3fde5e13a75dc17c33602f41595112
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_664f5b543543aac4cf0153a4ef4e0f85 |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y10S62-924
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J2205-02
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J2235-52
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J2245-02
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J2230-40
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J2205-04
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J2235-02
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J2270-08
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J2210-04
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J2245-40 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J3-04175
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J3-04412
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J3-04284
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J3-04296
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J3-0423
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J3-04048
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J3-04678
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J3-04339
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J3-0409 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/F25J3-04 |
| filingDate |
2007-06-05^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_2dbcb33e5286e129cd64a4ac5f1e97a4 |
| publicationDate |
2009-03-05^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
WO-2007145915-A3 |
| titleOfInvention |
Air separation method |
| abstract |
Argon, oxygen and nitrogen contained within an incoming air feed (10) is fractionated within an air separation system having a multiple column arrangement (32) that includes a higher pressure column (30) and a lower pressure column (34) to produce oxygen and nitrogen-rich fractions and an argon column (90) to produce an argon-rich fraction for recovery of the argon as an argon product. A two-phase stream (132; 134) can be formed by either expanding at least part of a liquid air stream (82) or by a liquid oxygen column bottoms (132) formed within a higher pressure column (30) of the multiple column arrangement (32). The liquid air stream (82) is formed by liquefying part of the air feed (22) to be fractionated against vaporizing a pumped liquid stream (76) composed of nitrogen and/or oxygen. The diversion of nitrogen vapor (146; 166) contained in the nitrogen-rich fraction increases the liquid to vapor ratio within the lower pressure (34) column to increase the argon recovery. |
| priorityDate |
2006-06-09^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |