FI96387C - En metod för att avlägsna kväveoksid från cellulosafabrikens rökgaser - Google Patents
En metod för att avlägsna kväveoksid från cellulosafabrikens rökgaser Download PDFInfo
- Publication number
- FI96387C FI96387C FI944344A FI944344A FI96387C FI 96387 C FI96387 C FI 96387C FI 944344 A FI944344 A FI 944344A FI 944344 A FI944344 A FI 944344A FI 96387 C FI96387 C FI 96387C
- Authority
- FI
- Finland
- Prior art keywords
- flue gases
- reagent
- flue gas
- flue
- gases
- Prior art date
Links
- 239000003546 flue gas Substances 0.000 title claims description 67
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 title claims description 27
- 238000000034 method Methods 0.000 title claims description 22
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 claims description 48
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 33
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 32
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 19
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 claims description 19
- 239000003153 chemical reaction reagent Substances 0.000 claims description 17
- 239000007789 gas Substances 0.000 claims description 14
- 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 claims description 12
- OSVXSBDYLRYLIG-UHFFFAOYSA-N dioxidochlorine(.) Chemical compound O=Cl=O OSVXSBDYLRYLIG-UHFFFAOYSA-N 0.000 claims description 12
- 238000011084 recovery Methods 0.000 claims description 11
- 239000007800 oxidant agent Substances 0.000 claims description 10
- 239000000126 substance Substances 0.000 claims description 10
- 229910052757 nitrogen Inorganic materials 0.000 claims description 8
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 7
- 238000002485 combustion reaction Methods 0.000 claims description 7
- 239000004155 Chlorine dioxide Substances 0.000 claims description 6
- 235000019398 chlorine dioxide Nutrition 0.000 claims description 6
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 claims description 6
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims description 5
- DWAQJAXMDSEUJJ-UHFFFAOYSA-M Sodium bisulfite Chemical compound [Na+].OS([O-])=O DWAQJAXMDSEUJJ-UHFFFAOYSA-M 0.000 claims description 4
- 235000010267 sodium hydrogen sulphite Nutrition 0.000 claims description 4
- 235000010265 sodium sulphite Nutrition 0.000 claims description 4
- AKHNMLFCWUSKQB-UHFFFAOYSA-L sodium thiosulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=S AKHNMLFCWUSKQB-UHFFFAOYSA-L 0.000 claims description 4
- 235000019345 sodium thiosulphate Nutrition 0.000 claims description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 3
- 239000001301 oxygen Substances 0.000 claims description 3
- 229910052760 oxygen Inorganic materials 0.000 claims description 3
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 claims description 2
- 239000004289 sodium hydrogen sulphite Substances 0.000 claims description 2
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 239000000567 combustion gas Substances 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 claims 1
- FWMUJAIKEJWSSY-UHFFFAOYSA-N sulfur dichloride Chemical compound ClSCl FWMUJAIKEJWSSY-UHFFFAOYSA-N 0.000 claims 1
- 238000013022 venting Methods 0.000 claims 1
- 239000000243 solution Substances 0.000 description 15
- 238000006243 chemical reaction Methods 0.000 description 10
- 229910001868 water Inorganic materials 0.000 description 7
- 239000011734 sodium Substances 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 238000004061 bleaching Methods 0.000 description 5
- 235000019391 nitrogen oxide Nutrition 0.000 description 5
- 230000003647 oxidation Effects 0.000 description 5
- 238000007254 oxidation reaction Methods 0.000 description 5
- 230000001590 oxidative effect Effects 0.000 description 5
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 4
- 229960003753 nitric oxide Drugs 0.000 description 4
- 238000005201 scrubbing Methods 0.000 description 4
- 239000011593 sulfur Substances 0.000 description 4
- 229910052717 sulfur Inorganic materials 0.000 description 4
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 description 3
- 229910002089 NOx Inorganic materials 0.000 description 3
- 150000001340 alkali metals Chemical class 0.000 description 3
- 229910000029 sodium carbonate Inorganic materials 0.000 description 3
- 235000017550 sodium carbonate Nutrition 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- ATRRKUHOCOJYRX-UHFFFAOYSA-N Ammonium bicarbonate Chemical compound [NH4+].OC([O-])=O ATRRKUHOCOJYRX-UHFFFAOYSA-N 0.000 description 2
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 2
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 2
- 229910052783 alkali metal Inorganic materials 0.000 description 2
- 239000001099 ammonium carbonate Substances 0.000 description 2
- 235000011114 ammonium hydroxide Nutrition 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 229910052938 sodium sulfate Inorganic materials 0.000 description 2
- 235000011152 sodium sulphate Nutrition 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 229910000013 Ammonium bicarbonate Inorganic materials 0.000 description 1
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonium chloride Substances [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-M Bicarbonate Chemical compound OC([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-M 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 229920001131 Pulp (paper) Polymers 0.000 description 1
- 239000004133 Sodium thiosulphate Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 229910000288 alkali metal carbonate Inorganic materials 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 235000012538 ammonium bicarbonate Nutrition 0.000 description 1
- 235000012501 ammonium carbonate Nutrition 0.000 description 1
- 239000000908 ammonium hydroxide Substances 0.000 description 1
- 235000014121 butter Nutrition 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- VDQVEACBQKUUSU-UHFFFAOYSA-M disodium;sulfanide Chemical compound [Na+].[Na+].[SH-] VDQVEACBQKUUSU-UHFFFAOYSA-M 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- KEUKAQNPUBYCIC-UHFFFAOYSA-N ethaneperoxoic acid;hydrogen peroxide Chemical compound OO.CC(=O)OO KEUKAQNPUBYCIC-UHFFFAOYSA-N 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- GRVFOGOEDUUMBP-UHFFFAOYSA-N sodium sulfide (anhydrous) Chemical compound [Na+].[Na+].[S-2] GRVFOGOEDUUMBP-UHFFFAOYSA-N 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000019635 sulfation Effects 0.000 description 1
- 238000005670 sulfation reaction Methods 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-L sulfite Chemical compound [O-]S([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-L 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D5/00—Sulfates or sulfites of sodium, potassium or alkali metals in general
- C01D5/14—Preparation of sulfites
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/10—Oxidants
- B01D2251/104—Ozone
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/10—Oxidants
- B01D2251/106—Peroxides
-
- 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)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Analytical Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Inorganic Chemistry (AREA)
- Biomedical Technology (AREA)
- Treating Waste Gases (AREA)
- Paper (AREA)
Claims (7)
1. Förfarande för avlägsning av kväveoxider ur rökgaserna frän en cellulosafabriks sodapanna, i vilket 5 förfarande ett oxiderande ämne, säsom klordioxid eller ozon, inmatas i rökgaserna, vilket ämne oxiderar kväveoxi-den tili kvävedioxid, kännetecknat av att rökgaserna därefter leds tili en rökgastvättare, i vilken en reagens, som är en frän cellulosafabrikens kemikaliecirkulation 10 härstammande kemikalie, insprutas i rökgaserna, vilken ke-mikalie bringats att reagera med ett andra ämne för att omvandla det tili en reagens, varvid reagensen reducerar kvävedioxiden tili kväve, när den hamnar i kontakt med kvävedioxid, varefter den kvävehaltiga rökgasen avleds 15 frän tvättaren och den oxiderade reagensen leds tillbaka tili cellulosafabrikens kemikaliecirkulationen.
2. Förf arande enligt patentkrav 1, kännetecknat av att som reagens som insprutas i rökgaserna används grönlut, som före inmatning i rökgaserna oxideras genom 2. att bringa den i kontakt med luft eller syre, varvid na-triumtiosulfat och natriumhydroxid bildas som reaktions- . ; produkt.
3. Förf arande enligt patentkrav 1, känneteck-nat av att som reagens som insprutas i rökgaserna används 25 grönlut, som före inmatning i rökgaserna sulfiteras genom **" att leda den i kontakt med svaveldioxid härstammande frän • · · **“ cellulosafabrikens luktgasförbränning, varvid natriumtio- • · * *·’ ' sulfat bildas.
4. Förf arande enligt patentkrav 1, känneteck- r *·**· 30 nat av att som reagens som insprutas i rökgaserna används • · 4 vitlut, som före inmatning i rökgaserna sulfiteras genom att bringa den i kontakt med svaveldioxid härstammande 9·. frän cellulosafabrikens luktgasförbränning, varvid natri- * · ’I’ umsulfit bildas. ·,· · 35
5. Förfarande enligt patentkrav 1, känneteck- nat av att som reagens som insprutas i rökgaserna används 11 96 3 8 7 vitlut eller en NaOH-lösning, som insprutas direkt i rök-gaserna, och att dessutom används som en andra reagens svaveldioxidhaltiga rökgaser härstammande frän cellulosa-fabrikens luktgasförbränning, vilka rökgaser likasä inma-5 tas i sodapannans rökgaser, varvid vitluten eller NaOH och den svaldioxidhaltiga rökgasen tillsammans bildar en reagens, där NaOH och svaveldioxid reagerar genom att bilda natriumsulfit, som reducerar kvävedioxiden.
6. Förf arande enligt patentkrav 5, känneteck-10 nat av att den svaveldioxidhaltiga rökgasen, som härstam- mar frän luktgasförbränningen, leds först i kontakt med vitlut, varvid en del av svaveldioxiden reagerar med i vitluten ingäende NaOH genom att bilda natriumbisulfit, som returneras tillbaka tili cellulosafabrikens cirkula-15 tion, och rökgaserna samt i rökgaserna kvarbliven svaveldioxid inmatas i sodapannans rökgaser.
7. Förfarande enligt nägot av föregäende patentkrav, kännetecknat av att reagensen inmatas i sodapannans rökgaser i rökgastvättaren. « « »»· » • ·· · « • ♦ · * • « « « • · · t ψ • · ♦ • · t f · • · • · · • · · « • · 4 4 4 • 4 4 * 4 4 4
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FI944344A FI96387C (sv) | 1994-09-19 | 1994-09-19 | En metod för att avlägsna kväveoksid från cellulosafabrikens rökgaser |
| US08/510,815 US5639434A (en) | 1994-09-19 | 1995-08-03 | Process for removing nitrogen oxides from the flue gases of a pulp mill |
| CA002155921A CA2155921C (en) | 1994-09-19 | 1995-08-11 | Process for removing nitrogen oxides from the flue gases of a pulp mill |
| ES09501738A ES2116893B1 (es) | 1994-09-19 | 1995-09-06 | Procedimiento para eliminar oxidos de nitrogeno de los gases de combustion de una planta de fabricacion de pulpa. |
| SE9503220A SE513708C2 (sv) | 1994-09-19 | 1995-09-18 | Förfarande för avlägsnande av kväveoxider från rökgaserna från en sodapanna i en cellulosafabrik |
| PT101772A PT101772B (pt) | 1994-09-19 | 1995-09-18 | Processo para a eliminacao de oxidos de azoto dos gases de descarga para a atmosfera da caldeira de recuperacao da soda de instalacoes de fabricacao de pasta de celulose |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FI944344A FI96387C (sv) | 1994-09-19 | 1994-09-19 | En metod för att avlägsna kväveoksid från cellulosafabrikens rökgaser |
| FI944344 | 1994-09-19 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| FI944344A0 FI944344A0 (sv) | 1994-09-19 |
| FI96387B FI96387B (sv) | 1996-03-15 |
| FI96387C true FI96387C (sv) | 2001-12-03 |
Family
ID=8541396
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FI944344A FI96387C (sv) | 1994-09-19 | 1994-09-19 | En metod för att avlägsna kväveoksid från cellulosafabrikens rökgaser |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US5639434A (sv) |
| CA (1) | CA2155921C (sv) |
| ES (1) | ES2116893B1 (sv) |
| FI (1) | FI96387C (sv) |
| PT (1) | PT101772B (sv) |
| SE (1) | SE513708C2 (sv) |
Families Citing this family (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2724577B1 (fr) * | 1994-09-21 | 1996-12-27 | Lab Sa | Perfectionnement aux procedes d'epuration des fumees par voie humide pour des polluants gazeux |
| CA2210849A1 (en) * | 1997-07-18 | 1999-01-18 | Enviro Energy Products, Inc. | 03 aspirator |
| FI104793B (sv) * | 1998-05-11 | 2000-04-14 | Ahlstrom Machinery Oy | Förfarande för avlägsnande av oxiderna av kväve ur rökgaser från en återvinningspanna |
| US5985223A (en) * | 1998-06-02 | 1999-11-16 | The Boc Group, Inc. | Removal of NOx and SOx emissions form pickling lines for metal treatment |
| US7303735B2 (en) * | 2003-10-17 | 2007-12-04 | The Boc Group, Inc. | Process for the removal of contaminants from gas streams |
| US8425866B2 (en) * | 2005-11-14 | 2013-04-23 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Control of emissions |
| US8409534B2 (en) * | 2007-03-28 | 2013-04-02 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Control of emissions |
| FI123022B (sv) * | 2007-09-03 | 2012-10-15 | Andritz Oy | Förfarande vid behandling av luktgaser från en cellulosafabrik |
| US7846406B2 (en) * | 2008-08-18 | 2010-12-07 | Furnary Kevin P | Scrubber for removing pollutants from flue gas |
| US8784762B2 (en) | 2011-02-15 | 2014-07-22 | Ati Properties, Inc. | Treatment of NOx-containing gas streams |
| US8795620B2 (en) | 2011-02-15 | 2014-08-05 | Ati Properties, Inc. | Systems and methods for recovering nitric acid from pickling solutions |
| US9981241B2 (en) | 2012-01-09 | 2018-05-29 | Alloys Cleaning, Inc. | Removal of atmospheric pollutants from gas, related apparatuses, processes and uses thereof |
| EP2802407B1 (en) | 2012-01-09 | 2018-10-31 | Alloy Cleaning, Inc | Removal of atmospheric pollutants from gas and related apparatus |
| US9144769B2 (en) | 2012-01-09 | 2015-09-29 | Scio-Tech, Llc | Removal of atmospheric pollutants from gas, related apparatus, processes and uses thereof |
| CN106031841B (zh) * | 2015-03-20 | 2020-01-07 | 北京博源恒升高科技有限公司 | 一种气体脱硝工艺及设备 |
| CN107537299A (zh) * | 2017-10-19 | 2018-01-05 | 贵州大学 | 一种过氧乙酸和臭氧共同氧化烟气脱硝的方法 |
| CN107569989A (zh) * | 2017-10-19 | 2018-01-12 | 贵州大学 | 一种过氧乙酸和臭氧共同氧化烟气脱硫脱硝的方法 |
| CN107737518A (zh) * | 2017-10-19 | 2018-02-27 | 贵州大学 | 一种过氧乙酸和臭氧共同氧化脱二氧化硫气体的方法 |
| SE544473C2 (en) * | 2020-05-27 | 2022-06-14 | Valmet Oy | A method and arrangement for managing and controlling nitrogen emission from a cyclic liquor flow system in a pulp mill |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5027763A (sv) * | 1973-07-16 | 1975-03-22 | ||
| GB1505169A (en) * | 1974-11-02 | 1978-03-30 | Fuji Kasui Eng Co Ltd | Process for removing nitrogen oxides from waste gas |
| SE450393B (sv) * | 1981-10-27 | 1987-06-22 | Mo Och Domsjoe Ab | Forfarande for behandling av ved med kveveoxider och syrgas fore sulfatkokning |
| SE434283B (sv) * | 1982-12-01 | 1984-07-16 | Mo Och Domsjoe Ab | Forfarande for delignifiering av cellulosamassa med kveveoxider och syrgas |
| SE8605120L (sv) * | 1986-08-14 | 1988-02-15 | Alby Klorat Ab | Sett att bereda sulfidfri alkalilut |
| US5023064A (en) * | 1987-03-02 | 1991-06-11 | Turbotak Inc. | Method for removing sulfur oxide |
-
1994
- 1994-09-19 FI FI944344A patent/FI96387C/sv not_active IP Right Cessation
-
1995
- 1995-08-03 US US08/510,815 patent/US5639434A/en not_active Expired - Lifetime
- 1995-08-11 CA CA002155921A patent/CA2155921C/en not_active Expired - Lifetime
- 1995-09-06 ES ES09501738A patent/ES2116893B1/es not_active Expired - Fee Related
- 1995-09-18 SE SE9503220A patent/SE513708C2/sv not_active IP Right Cessation
- 1995-09-18 PT PT101772A patent/PT101772B/pt not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| US5639434A (en) | 1997-06-17 |
| FI944344A0 (sv) | 1994-09-19 |
| SE513708C2 (sv) | 2000-10-23 |
| ES2116893A1 (es) | 1998-07-16 |
| PT101772B (pt) | 1999-01-29 |
| ES2116893B1 (es) | 1999-04-01 |
| FI96387B (sv) | 1996-03-15 |
| SE9503220L (sv) | 1996-03-20 |
| PT101772A (pt) | 1996-04-30 |
| CA2155921A1 (en) | 1996-03-20 |
| CA2155921C (en) | 2004-01-20 |
| SE9503220D0 (sv) | 1995-09-18 |
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