DE2745513C2 - - Google Patents
Info
- Publication number
- DE2745513C2 DE2745513C2 DE2745513A DE2745513A DE2745513C2 DE 2745513 C2 DE2745513 C2 DE 2745513C2 DE 2745513 A DE2745513 A DE 2745513A DE 2745513 A DE2745513 A DE 2745513A DE 2745513 C2 DE2745513 C2 DE 2745513C2
- Authority
- DE
- Germany
- Prior art keywords
- solution
- nitrogen
- tower
- nitric acid
- oxide
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 claims description 247
- 239000007789 gas Substances 0.000 claims description 62
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 61
- 229910017604 nitric acid Inorganic materials 0.000 claims description 61
- 239000000243 solution Substances 0.000 claims description 56
- GQPLMRYTRLFLPF-UHFFFAOYSA-N nitrous oxide Inorganic materials [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 claims description 50
- 238000000034 method Methods 0.000 claims description 48
- 239000007788 liquid Substances 0.000 claims description 35
- 238000006243 chemical reaction Methods 0.000 claims description 29
- 239000000463 material Substances 0.000 claims description 25
- 238000005406 washing Methods 0.000 claims description 25
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 claims description 22
- 229910002651 NO3 Inorganic materials 0.000 claims description 20
- 230000003647 oxidation Effects 0.000 claims description 18
- 238000007254 oxidation reaction Methods 0.000 claims description 18
- 238000003795 desorption Methods 0.000 claims description 17
- -1 nitrite ions Chemical class 0.000 claims description 16
- 230000008569 process Effects 0.000 claims description 15
- 239000007864 aqueous solution Substances 0.000 claims description 4
- 238000000354 decomposition reaction Methods 0.000 claims description 2
- 150000001768 cations Chemical class 0.000 claims 2
- JPVYNHNXODAKFH-UHFFFAOYSA-N Cu2+ Chemical compound [Cu+2] JPVYNHNXODAKFH-UHFFFAOYSA-N 0.000 claims 1
- 229910001431 copper ion Inorganic materials 0.000 claims 1
- 238000010438 heat treatment Methods 0.000 claims 1
- 239000002440 industrial waste Substances 0.000 claims 1
- IOVCWXUNBOPUCH-UHFFFAOYSA-N Nitrous acid Chemical compound ON=O IOVCWXUNBOPUCH-UHFFFAOYSA-N 0.000 description 59
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 37
- 238000010521 absorption reaction Methods 0.000 description 20
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 18
- LZDSILRDTDCIQT-UHFFFAOYSA-N dinitrogen trioxide Chemical compound [O-][N+](=O)N=O LZDSILRDTDCIQT-UHFFFAOYSA-N 0.000 description 18
- 230000000694 effects Effects 0.000 description 13
- WFPZPJSADLPSON-UHFFFAOYSA-N dinitrogen tetraoxide Chemical compound [O-][N+](=O)[N+]([O-])=O WFPZPJSADLPSON-UHFFFAOYSA-N 0.000 description 12
- 150000002823 nitrates Chemical class 0.000 description 11
- 229910052757 nitrogen Inorganic materials 0.000 description 10
- 238000011084 recovery Methods 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 7
- 239000002253 acid Substances 0.000 description 6
- 230000005611 electricity Effects 0.000 description 6
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 description 6
- 238000012856 packing Methods 0.000 description 6
- 238000005201 scrubbing Methods 0.000 description 6
- MGWGWNFMUOTEHG-UHFFFAOYSA-N 4-(3,5-dimethylphenyl)-1,3-thiazol-2-amine Chemical compound CC1=CC(C)=CC(C=2N=C(N)SC=2)=C1 MGWGWNFMUOTEHG-UHFFFAOYSA-N 0.000 description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 5
- 238000004364 calculation method Methods 0.000 description 5
- GPRLSGONYQIRFK-UHFFFAOYSA-N hydron Chemical compound [H+] GPRLSGONYQIRFK-UHFFFAOYSA-N 0.000 description 5
- 239000007791 liquid phase Substances 0.000 description 5
- 239000001301 oxygen Substances 0.000 description 5
- 229910052760 oxygen Inorganic materials 0.000 description 5
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 238000006396 nitration reaction Methods 0.000 description 4
- 239000012071 phase Substances 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- 150000003839 salts Chemical class 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 150000002826 nitrites Chemical class 0.000 description 3
- 230000008929 regeneration Effects 0.000 description 3
- 238000011069 regeneration method Methods 0.000 description 3
- 238000001179 sorption measurement Methods 0.000 description 3
- 230000006641 stabilisation Effects 0.000 description 3
- 238000011105 stabilization Methods 0.000 description 3
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 238000003915 air pollution Methods 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000004061 bleaching Methods 0.000 description 2
- 239000006227 byproduct Substances 0.000 description 2
- 230000003197 catalytic effect Effects 0.000 description 2
- 238000003889 chemical engineering Methods 0.000 description 2
- 229910017052 cobalt Inorganic materials 0.000 description 2
- 239000010941 cobalt Substances 0.000 description 2
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 229910017464 nitrogen compound Inorganic materials 0.000 description 2
- 150000002830 nitrogen compounds Chemical class 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 235000010333 potassium nitrate Nutrition 0.000 description 2
- 239000004323 potassium nitrate Substances 0.000 description 2
- 230000036632 reaction speed Effects 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 229910052720 vanadium Inorganic materials 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 229910052768 actinide Inorganic materials 0.000 description 1
- 150000001255 actinides Chemical class 0.000 description 1
- 239000013543 active substance Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 1
- 150000001342 alkaline earth metals Chemical class 0.000 description 1
- 239000012670 alkaline solution Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 238000010411 cooking Methods 0.000 description 1
- GQPKMYBWFXDMIY-UHFFFAOYSA-N copper;nitrate Chemical class [Cu].[O-][N+]([O-])=O GQPKMYBWFXDMIY-UHFFFAOYSA-N 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000007323 disproportionation reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 229910001960 metal nitrate Inorganic materials 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000002808 molecular sieve Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000001272 nitrous oxide Substances 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 235000020030 perry Nutrition 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000011833 salt mixture Substances 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 150000003431 steroids Chemical class 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/54—Nitrogen compounds
- B01D53/56—Nitrogen oxides
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B21/00—Nitrogen; Compounds thereof
- C01B21/20—Nitrogen oxides; Oxyacids of nitrogen; Salts thereof
- C01B21/50—Nitrous acid; Salts thereof
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
- Y02C20/00—Capture or disposal of greenhouse gases
- Y02C20/10—Capture or disposal of greenhouse gases of nitrous oxide (N2O)
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Inorganic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Environmental & Geological Engineering (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treating Waste Gases (AREA)
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB40338/77A GB1587456A (en) | 1977-09-28 | 1977-09-28 | Process for the removal of nitrogen oxides from industrial gases by use of oxidising solutions in which nitrates are the oxidants |
| ZA00775882A ZA775882B (en) | 1977-09-28 | 1977-10-03 | A process for the removal of nitrogen oxides from industrial gases by use of oxidising solutions in which nitrates are the oxidants |
| BE181580A BE859532A (fr) | 1977-09-28 | 1977-10-10 | Elimination d'oxydes d'azote de gaz industriels |
| FR7730349A FR2407736A1 (fr) | 1977-09-28 | 1977-10-10 | Procede pour debarasser des gaz industriels d'oxydes d'azote a l'aide de solutions oxydantes dans lesquelles des nitrates jouent le role d'oxydants |
| DE19772745513 DE2745513A1 (de) | 1977-09-28 | 1977-10-10 | Verfahren zur entfernung von stickoxiden aus industriegasen |
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB40338/77A GB1587456A (en) | 1977-09-28 | 1977-09-28 | Process for the removal of nitrogen oxides from industrial gases by use of oxidising solutions in which nitrates are the oxidants |
| ZA00775882A ZA775882B (en) | 1977-09-28 | 1977-10-03 | A process for the removal of nitrogen oxides from industrial gases by use of oxidising solutions in which nitrates are the oxidants |
| BE181580A BE859532A (fr) | 1977-09-28 | 1977-10-10 | Elimination d'oxydes d'azote de gaz industriels |
| FR7730349A FR2407736A1 (fr) | 1977-09-28 | 1977-10-10 | Procede pour debarasser des gaz industriels d'oxydes d'azote a l'aide de solutions oxydantes dans lesquelles des nitrates jouent le role d'oxydants |
| DE19772745513 DE2745513A1 (de) | 1977-09-28 | 1977-10-10 | Verfahren zur entfernung von stickoxiden aus industriegasen |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DE2745513A1 DE2745513A1 (de) | 1979-04-19 |
| DE2745513C2 true DE2745513C2 (enrdf_load_stackoverflow) | 1989-10-19 |
Family
ID=27507575
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19772745513 Granted DE2745513A1 (de) | 1977-09-28 | 1977-10-10 | Verfahren zur entfernung von stickoxiden aus industriegasen |
Country Status (5)
| Country | Link |
|---|---|
| BE (1) | BE859532A (enrdf_load_stackoverflow) |
| DE (1) | DE2745513A1 (enrdf_load_stackoverflow) |
| FR (1) | FR2407736A1 (enrdf_load_stackoverflow) |
| GB (1) | GB1587456A (enrdf_load_stackoverflow) |
| ZA (1) | ZA775882B (enrdf_load_stackoverflow) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2939674A1 (de) * | 1979-09-29 | 1981-04-09 | Hoechst Ag, 6000 Frankfurt | Verfahren zur absorption nitroser gase |
| FR2486818B1 (fr) * | 1980-07-18 | 1985-05-31 | Rhone Poulenc Chim Base | Procede de traitement d'un gaz contenant des oxydes d'azote |
| DE4027404A1 (de) * | 1990-02-26 | 1991-08-29 | Fritz Curtius | Verfahren zur oxidation von nitrosen gasen (no) in einem gasstrom, durch eine waesche des gasstrom mit salpetersaeure |
| CN109319776B (zh) * | 2018-11-30 | 2023-09-15 | 黄冈师范学院 | 氧化氮和铁离子催化氧化回收金刚石的方法、装置及应用 |
| WO2022135223A1 (zh) * | 2020-12-26 | 2022-06-30 | 黄立维 | 一种气流中一氧化氮的去除装置和工艺 |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE753116C (de) * | 1942-04-29 | 1953-05-26 | Ig Farbenindustrie Ag | UEberfuehrung von Stickstoffmonoxyd in Stickstoffdioxyd |
| GB1051100A (enrdf_load_stackoverflow) * | 1963-08-15 | 1900-01-01 | ||
| DE1667595C3 (de) * | 1967-12-29 | 1974-01-10 | Lentia Gmbh, Chem. U. Pharm. Erzeugnisse - Industriebedarf, 8000 Muenchen | Verfahren zur kontinuierlichen Herstellung von Distickstofftetroxyd |
| US3927183A (en) * | 1968-04-26 | 1975-12-16 | Showa Denko Kk | Method for oxidizing nitrogen oxides |
| DE2117226A1 (de) * | 1971-04-08 | 1972-10-19 | Uhde Gmbh Friedrich | Verfahren zur Entfernung von Stickstoffoxyden aus Abgasen |
-
1977
- 1977-09-28 GB GB40338/77A patent/GB1587456A/en not_active Expired
- 1977-10-03 ZA ZA00775882A patent/ZA775882B/xx unknown
- 1977-10-10 DE DE19772745513 patent/DE2745513A1/de active Granted
- 1977-10-10 BE BE181580A patent/BE859532A/xx not_active IP Right Cessation
- 1977-10-10 FR FR7730349A patent/FR2407736A1/fr active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| FR2407736A1 (fr) | 1979-06-01 |
| ZA775882B (en) | 1979-05-30 |
| GB1587456A (en) | 1981-04-01 |
| BE859532A (fr) | 1978-02-01 |
| DE2745513A1 (de) | 1979-04-19 |
| FR2407736B1 (enrdf_load_stackoverflow) | 1982-03-19 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 8110 | Request for examination paragraph 44 | ||
| D2 | Grant after examination | ||
| 8363 | Opposition against the patent | ||
| 8339 | Ceased/non-payment of the annual fee |