| Predicate |
Object |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J2200-20
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J2200-54
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J2245-50 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J3-04393
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J3-04357
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J3-04315
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J3-04418
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J3-04321 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/F25J3-04 |
| filingDate |
1998-08-27^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate |
1999-03-25^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
KR-19990023921-A |
| titleOfInvention |
Dual Column Cryogenic Rectification Systems to Generate Nitrogen |
| abstract |
FIELD OF THE INVENTION The present invention relates to a double column cryogenic rectification system for producing high purity nitrogen at high pressure, in which the top steam from the first column is treated in an intermediate heat exchanger of the second column and oxygen-rich steam from the second column. Is separated by turboexpansion and cooling. |
| priorityDate |
1997-08-29^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |