| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_b051f9f7933c758e66f6ceda5c9fb2cc |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J2250-20
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J2245-42
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J2215-56
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J2200-20
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J2235-42
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J2200-54
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J2200-34
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J2215-44
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J2200-32
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J2215-42
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J2200-90 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J3-04454
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J3-04884
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J1-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J3-04424
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J3-0443
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J3-04303 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/F25J3-04 |
| filingDate |
1997-08-07^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_87450dfd7bdc406ee0db1bd3ead7d16d
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d3e31ee9c0d486abcf455a5269844e63 |
| publicationDate |
1998-03-17^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
JP-H1073372-A |
| titleOfInvention |
Low temperature distillation method of air raw material for producing nitrogen |
| abstract |
PROBLEM TO BE SOLVED: To provide a variety of processes for low-temperature distillation of feed air to produce nitrogen, particularly from low purity (up to 98% nitrogen) to ultra-high purity (less than 1 ppb oxygen). A method for producing high-purity high-pressure nitrogen is provided. The method uses an auxiliary low pressure separation zone D2 in addition to a normal high pressure column D1 and a low pressure column D3. Operating at the same pressure as the low pressure column D3 and the bottom reboiler / This auxiliary low pressure separation zone D2, which is thermally combined with the top of the high pressure column D1 by the condenser R / C1, pretreats the crude liquid oxygen 30 from the bottom of the high pressure column D1. Nitrogen 2 2, 62, 66 may be manufactured at two different pressures and two different purities. |
| priorityDate |
1996-08-07^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |