| Predicate |
Object |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J2200-78
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J2205-04
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y02E50-30
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J2270-02
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J2235-60
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y10S62-927
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J2270-42
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J2200-72
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J2200-50
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J2280-02
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J2230-42
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J2245-42
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J2200-06 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J3-0257
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J3-0233
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J3-0209 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/F25J3-02 |
| filingDate |
2003-07-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_c6d74e3f09b0efc79f19151bfcf09c9d |
| publicationDate |
2004-04-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-2004079108-A1 |
| titleOfInvention |
Nitrogen rejection method and apparatus |
| abstract |
Nitrogen is rejected from a feed gas stream comprising methane and nitrogen so as to form a methane product. The feed gas is separated in a double rectification column comprising a higher pressure rectification column 14, a lower pressure rectification column 16, and a condenser-reboiler 18. Product methane is withdrawn from the column 16 by a pump 42 and is vaporised. A flow of gas is recycled from the column 16 to the column 14, being warmed in main heat exchanger 4. A first part of the warmed recycle gas being compressed in compressor 48 to a first pressure and introduced into the higher pressure rectification column 14. A second part of the warmed recycle gas is compressed in the compressor 48 and condensed in a second condenser-reboiler associated with an intermediate main exchange region of the lower pressure column 16 and is returned to the higher pressure rectification column 14. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-112452095-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2011209499-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2010126215-A1 |
| priorityDate |
2002-07-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |