| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_b3cfdc2686d10506a737643e3e739e39 |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J2290-12
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J2290-50
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J2245-42
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y10S62-927
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J2205-66
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J2280-02
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J2290-80
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J2200-06
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J2270-42
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J2205-04
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J2290-10
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J2200-72
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J2200-78
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J2235-60 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J3-0209
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J3-0233
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C7-04
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J3-0257 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C7-04
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/F25J3-02 |
| filingDate |
2002-07-08-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_44e87980e8dcac0f6321a442478402ee |
| publicationDate |
2004-07-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
MX-PA02006740-A |
| titleOfInvention |
METHOD AND APPLIANCE FOR NITROGEN REJECTION. |
| abstract |
Nitrogen is rejected from a jet of feed gas comprising methane and nitrogen to form a methane product. The feed gas jet is cooled in a main heat exchanger 4, and rectified in a double rectification column 12A comprising a higher pressure rectification column 14A, a lower pressure rectification column 16A, and a condenser-evaporator 18A that places the highest pressure rectification column 14A in relation to heat exchange with the lowest pressure rectification column 16A. At least part of the feed gas jet is expanded in the higher pressure rectification column 14A through an expansion valve 23, the feed gas jet is partially liquefied upstream of the double rectification column 12A. Over a period of time, the molar fraction of nitrogen in the feed gas mixture increases. In a suitable incremental nitrogen molar fraction operation of a second double rectification column 12B in parallel with the first double rectification column 12A is started. |
| priorityDate |
2001-07-11-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |