| Predicate |
Object |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J2250-42
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J2250-20
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J2235-42
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J2205-04
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J2200-54
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J2250-50
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J2250-40
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J2250-52
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J2245-50
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J2245-42
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J2200-20 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J3-04357
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J3-042
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J3-04442
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J3-04103
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J3-04212
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J3-04066
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J3-04206
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J3-04309
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J3-04418
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J3-04303
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J3-0409
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J3-04393
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J3-04412 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/F25J3-04 |
| filingDate |
1987-07-15^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
1992-05-06^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate |
1992-05-06^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
EP-0313581-B1 |
| titleOfInvention |
Nitrogen partial expansion refrigeration for cryogenic air separation |
| abstract |
A means of producing at least one of high purity nitrogen and low to medium purity oxygen (up to 97 % purity) at high recovery (above 96 % for oxygen). The LP column efficiency is improved to reduce the energy requirement, without offsetting reduction in LN2 reflux availability. Referring to Figure 1, this is done by providing intermediate height reboil to LP column (3) by a latent heat exchanger (10) in which HP rectifier (5) overhead N2 vapor which has been partially expanded in expander (9) is condensed and kettle liquid is evaporated. The condensed N2 is then used to reflux column (3) after depressurization by valve (13). |
| priorityDate |
1986-07-15^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |