| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_b051f9f7933c758e66f6ceda5c9fb2cc |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J2200-54
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J2250-52
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/F25J2270-88
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J2215-52
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J2200-20
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J2245-42
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J2200-34
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J2235-42
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J2240-12 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J3-04878
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J3-04418
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J3-04381
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J3-04284
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J3-04412
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J3-0406
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J3-04303
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J3-04393
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J3-04066
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J3-04351
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J3-04054
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J3-0409
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F25J3-04309 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/F25J3-04 |
| filingDate |
1999-01-21^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_940ce1da9470185e1cafc7aeef865d5b
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_0652ef31294b85aab23d90b9229c6047
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d3e31ee9c0d486abcf455a5269844e63 |
| publicationDate |
1999-07-28^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
EP-0932000-A2 |
| titleOfInvention |
Efficient process to produce oxygen |
| abstract |
The power consumption required by the cryogenic distillation of air in andistillation column system comprising at least one distillation column (198) wherein thenboil-up (193; 593 Fig 5; 893 Fig 8) at the bottom of the distillation column (198)nproducing a oxygen product (172) is provided by condensing a stream (152; 552 Fig 5)nwhose nitrogen concentration is at least equal to that in the feed air stream (100), isnreduced by (a) generating work energy which is at least ten percent of the overallnrefrigeration demand of the distillation column system by (1) work expanding (139) anfirst process stream (154 Fig 2; 538 Fig 5; 738 Fig 7; 838 Fig 8) with nitrogen content atnleast equal to that in the feed air (100) and then condensing at least a portion of thenexpanded stream (240 Fig 2; 540 Fig 5; 740 Fig 7) by latent heat exchange (194 Fig 2;n394 Fig 3; 594 Fig 5; 794 Fig 7; 894 Fig 8) with (i) a liquid at an intermediate height innthe distillation column (198) producing oxygen product and/or (ii) one of the liquid feedsn(136) to this distillation column having an oxygen concentration at least equal to thenconcentration of oxygen in the feed air (100); and/or (2) condensing at least a secondnprocess stream (154) with nitrogen content at least equal to that in the feed air (100) bynlatent heat exchange (194) with at least a portion (136) of a liquid stream which hasnoxygen concentration at least equal to the concentration of oxygen in the feed air (100)nand which is also at a pressure greater than the pressure of the distillation column (198)nproducing oxygen product, and after vaporization of at least a portion of said liquidnstream into a vapor fraction (137) due to latent heat exchange (194), work expandingn(139) at least a portion of the resulting vapor stream (137); (b) work expanding (103;n603 Fig 6; 703 Fig 7) a third process stream (104; 604 Fig 6; 704 Fig 7; 904 Fig 9) tonproduce additional work energy such that the total work generated along with step (a)nexceeds the total refrigeration demand of the cryogenic distillation and, if the thirdnprocess stream (704 Fig 7) is the same as the first process stream (738 Fig 7) in stepn(a)(1), at least a portion of said third process stream (704) after work expansion (703) isnnot condensed against either of the two liquid streams described in step (a)(1); andn(c) using the work which is generated in excess of the refrigeration need of thendistillation column system to cold compress (115; 484 Fig 4; 515 Fig 5; 784 Fig 7) anprocess stream (114; 482 Fig 4; 551 Fig 5; 782 Fig 7; 851 Fig 8) at a temperature lowernthan the ambient temperature. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0962732-B1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-9945606-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-2703757-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/FR-2973485-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2005057112-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2009130430-A3
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2009130430-A2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/FR-2864213-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2014037091-A3
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2009136077-A3
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2009136077-A2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/FR-2930327-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-3988879-A3
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-2015012-A3
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/FR-2930328-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/FR-2854683-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2008059399-A2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2008059399-A3
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6962062-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/FR-2831251-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2004099691-A1 |
| priorityDate |
1998-01-22^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |