CA1239770A - Process of removing hydrogen sulfide from gas mixtures - Google Patents
Process of removing hydrogen sulfide from gas mixturesInfo
- Publication number
- CA1239770A CA1239770A CA000458230A CA458230A CA1239770A CA 1239770 A CA1239770 A CA 1239770A CA 000458230 A CA000458230 A CA 000458230A CA 458230 A CA458230 A CA 458230A CA 1239770 A CA1239770 A CA 1239770A
- Authority
- CA
- Canada
- Prior art keywords
- gas
- aqueous medium
- nitrite
- present
- aqueous
- 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
- 239000007789 gas Substances 0.000 title claims abstract description 83
- 238000000034 method Methods 0.000 title claims abstract description 61
- 239000000203 mixture Substances 0.000 title claims abstract description 54
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 title claims abstract description 9
- 229910000037 hydrogen sulfide Inorganic materials 0.000 title claims abstract description 9
- LPXPTNMVRIOKMN-UHFFFAOYSA-M sodium nitrite Chemical compound [Na+].[O-]N=O LPXPTNMVRIOKMN-UHFFFAOYSA-M 0.000 claims abstract description 42
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 27
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 claims abstract description 23
- 235000010288 sodium nitrite Nutrition 0.000 claims abstract description 21
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 40
- 239000012736 aqueous medium Substances 0.000 claims description 36
- 238000005201 scrubbing Methods 0.000 claims description 27
- 239000003345 natural gas Substances 0.000 claims description 18
- 239000006172 buffering agent Substances 0.000 claims description 11
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 claims description 9
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 6
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 5
- BVKZGUZCCUSVTD-UHFFFAOYSA-M Bicarbonate Chemical class OC([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-M 0.000 claims description 4
- 235000019270 ammonium chloride Nutrition 0.000 claims description 4
- 239000001569 carbon dioxide Substances 0.000 claims description 3
- 229910019142 PO4 Inorganic materials 0.000 claims description 2
- 235000021317 phosphate Nutrition 0.000 claims description 2
- 150000003013 phosphoric acid derivatives Chemical class 0.000 claims description 2
- 125000005498 phthalate group Chemical class 0.000 claims description 2
- 150000001642 boronic acid derivatives Chemical class 0.000 claims 1
- 229930195733 hydrocarbon Natural products 0.000 abstract description 8
- 150000002430 hydrocarbons Chemical class 0.000 abstract description 8
- -1 sodium nitrite Chemical compound 0.000 abstract description 8
- 239000007864 aqueous solution Substances 0.000 abstract description 7
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 20
- 239000002609 medium Substances 0.000 description 15
- 239000011593 sulfur Substances 0.000 description 14
- 229910052717 sulfur Inorganic materials 0.000 description 14
- 239000008367 deionised water Substances 0.000 description 11
- 229910021641 deionized water Inorganic materials 0.000 description 11
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 9
- 239000008246 gaseous mixture Substances 0.000 description 8
- 239000002244 precipitate Substances 0.000 description 8
- 239000000243 solution Substances 0.000 description 8
- 230000015572 biosynthetic process Effects 0.000 description 7
- 239000006227 byproduct Substances 0.000 description 7
- 239000012530 fluid Substances 0.000 description 7
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 6
- 239000000872 buffer Substances 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 6
- 239000007788 liquid Substances 0.000 description 6
- 239000000047 product Substances 0.000 description 6
- 239000004215 Carbon black (E152) Substances 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 5
- 229910021538 borax Inorganic materials 0.000 description 5
- 150000002826 nitrites Chemical class 0.000 description 5
- 235000010339 sodium tetraborate Nutrition 0.000 description 5
- BSVBQGMMJUBVOD-UHFFFAOYSA-N trisodium borate Chemical compound [Na+].[Na+].[Na+].[O-]B([O-])[O-] BSVBQGMMJUBVOD-UHFFFAOYSA-N 0.000 description 5
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 4
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 4
- 230000003647 oxidation Effects 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 4
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 3
- 241000282320 Panthera leo Species 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 239000005083 Zinc sulfide Substances 0.000 description 3
- 239000002253 acid Substances 0.000 description 3
- 239000000908 ammonium hydroxide Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000002309 gasification Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- 235000017557 sodium bicarbonate Nutrition 0.000 description 3
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 3
- 229910052984 zinc sulfide Inorganic materials 0.000 description 3
- DRDVZXDWVBGGMH-UHFFFAOYSA-N zinc;sulfide Chemical compound [S-2].[Zn+2] DRDVZXDWVBGGMH-UHFFFAOYSA-N 0.000 description 3
- 235000009434 Actinidia chinensis Nutrition 0.000 description 2
- 235000009436 Actinidia deliciosa Nutrition 0.000 description 2
- 244000298697 Actinidia deliciosa Species 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 241001441571 Hiodontidae Species 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 235000006679 Mentha X verticillata Nutrition 0.000 description 2
- 235000002899 Mentha suaveolens Nutrition 0.000 description 2
- 235000001636 Mentha x rotundifolia Nutrition 0.000 description 2
- IOVCWXUNBOPUCH-UHFFFAOYSA-N Nitrous acid Chemical compound ON=O IOVCWXUNBOPUCH-UHFFFAOYSA-N 0.000 description 2
- 239000002250 absorbent Substances 0.000 description 2
- 230000002745 absorbent Effects 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 229910052783 alkali metal Inorganic materials 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 239000000571 coke Substances 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 239000010779 crude oil Substances 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 229910001385 heavy metal Inorganic materials 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- ATRRKUHOCOJYRX-UHFFFAOYSA-N Ammonium bicarbonate Chemical compound [NH4+].OC([O-])=O ATRRKUHOCOJYRX-UHFFFAOYSA-N 0.000 description 1
- 229910000013 Ammonium bicarbonate Inorganic materials 0.000 description 1
- BTBUEUYNUDRHOZ-UHFFFAOYSA-N Borate Chemical compound [O-]B([O-])[O-] BTBUEUYNUDRHOZ-UHFFFAOYSA-N 0.000 description 1
- 241000754798 Calophyllum brasiliense Species 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- OTMSDBZUPAUEDD-UHFFFAOYSA-N Ethane Chemical class CC OTMSDBZUPAUEDD-UHFFFAOYSA-N 0.000 description 1
- AZFNGPAYDKGCRB-XCPIVNJJSA-M [(1s,2s)-2-amino-1,2-diphenylethyl]-(4-methylphenyl)sulfonylazanide;chlororuthenium(1+);1-methyl-4-propan-2-ylbenzene Chemical compound [Ru+]Cl.CC(C)C1=CC=C(C)C=C1.C1=CC(C)=CC=C1S(=O)(=O)[N-][C@@H](C=1C=CC=CC=1)[C@@H](N)C1=CC=CC=C1 AZFNGPAYDKGCRB-XCPIVNJJSA-M 0.000 description 1
- 238000003916 acid precipitation Methods 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 239000013543 active substance Substances 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 235000012538 ammonium bicarbonate Nutrition 0.000 description 1
- 239000001099 ammonium carbonate Substances 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000002802 bituminous coal Substances 0.000 description 1
- 239000007853 buffer solution Substances 0.000 description 1
- 239000008366 buffered solution Substances 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 244000309464 bull Species 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000002939 deleterious effect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 231100001261 hazardous Toxicity 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 208000037805 labour Diseases 0.000 description 1
- IDNHOWMYUQKKTI-UHFFFAOYSA-M lithium nitrite Chemical compound [Li+].[O-]N=O IDNHOWMYUQKKTI-UHFFFAOYSA-M 0.000 description 1
- AAJBNRZDTJPMTJ-UHFFFAOYSA-L magnesium;dinitrite Chemical compound [Mg+2].[O-]N=O.[O-]N=O AAJBNRZDTJPMTJ-UHFFFAOYSA-L 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 229910000402 monopotassium phosphate Inorganic materials 0.000 description 1
- 235000019796 monopotassium phosphate Nutrition 0.000 description 1
- 229940005654 nitrite ion Drugs 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 150000002898 organic sulfur compounds Chemical class 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- RAFRTSDUWORDLA-UHFFFAOYSA-N phenyl 3-chloropropanoate Chemical compound ClCCC(=O)OC1=CC=CC=C1 RAFRTSDUWORDLA-UHFFFAOYSA-N 0.000 description 1
- PJNZPQUBCPKICU-UHFFFAOYSA-N phosphoric acid;potassium Chemical compound [K].OP(O)(O)=O PJNZPQUBCPKICU-UHFFFAOYSA-N 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- IWZKICVEHNUQTL-UHFFFAOYSA-M potassium hydrogen phthalate Chemical compound [K+].OC(=O)C1=CC=CC=C1C([O-])=O IWZKICVEHNUQTL-UHFFFAOYSA-M 0.000 description 1
- 235000010289 potassium nitrite Nutrition 0.000 description 1
- 239000004304 potassium nitrite Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 235000011121 sodium hydroxide Nutrition 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 150000003752 zinc compounds Chemical class 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
- B01D53/14—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 by absorption
- B01D53/1493—Selection of liquid materials for use as absorbents
-
- 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
- B01D53/14—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 by absorption
- B01D53/1456—Removing acid components
- B01D53/1468—Removing hydrogen sulfide
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C7/00—Purification; Separation; Use of additives
- C07C7/148—Purification; Separation; Use of additives by treatment giving rise to a chemical modification of at least one compound
- C07C7/14833—Purification; Separation; Use of additives by treatment giving rise to a chemical modification of at least one compound with metals or their inorganic compounds
- C07C7/1485—Purification; Separation; Use of additives by treatment giving rise to a chemical modification of at least one compound with metals or their inorganic compounds oxides; hydroxides; salts
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Water Supply & Treatment (AREA)
- Treating Waste Gases (AREA)
- Gas Separation By Absorption (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US06/549,274 US4515759A (en) | 1983-11-03 | 1983-11-03 | Process of removing hydrogen sulfide from gas mixtures |
| US549,274 | 1983-11-03 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1239770A true CA1239770A (en) | 1988-08-02 |
Family
ID=24192327
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000458230A Expired CA1239770A (en) | 1983-11-03 | 1984-07-05 | Process of removing hydrogen sulfide from gas mixtures |
Country Status (14)
| Country | Link |
|---|---|
| US (1) | US4515759A (enExample) |
| JP (1) | JPS60118215A (enExample) |
| AU (1) | AU582550B2 (enExample) |
| BE (1) | BE900963A (enExample) |
| BR (1) | BR8405578A (enExample) |
| CA (1) | CA1239770A (enExample) |
| DE (1) | DE3422967A1 (enExample) |
| DK (1) | DK295784A (enExample) |
| FR (1) | FR2554361B1 (enExample) |
| GB (1) | GB2148930B (enExample) |
| IN (1) | IN163436B (enExample) |
| IT (1) | IT1175895B (enExample) |
| NL (1) | NL8402057A (enExample) |
| NO (1) | NO161539C (enExample) |
Families Citing this family (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3679307D1 (de) * | 1985-10-11 | 1991-06-20 | Buchs Umwelttech Utb | Verfahren zum entschwefeln von schwefelwasserstoffhaltigem gas und vorrichtung zur durchfuehrung des verfahrens. |
| US4891205A (en) * | 1986-02-24 | 1990-01-02 | The Dow Chemical Company | Stabilized chelating agents for removing hydrogen sulfide |
| US4690805A (en) * | 1986-03-11 | 1987-09-01 | Nl Industries, Inc. | Process for removal of mercaptans from gas streams |
| US4758371A (en) * | 1986-03-11 | 1988-07-19 | Nl Industries, Inc. | Process and composition for removal of mercaptans from gas streams |
| US4880609A (en) * | 1988-11-23 | 1989-11-14 | Champion Chemicals, Inc. | Chelate catalyst system for H2 S removal from a gas stream |
| US4978512B1 (en) * | 1988-12-23 | 1993-06-15 | Composition and method for sweetening hydrocarbons | |
| US5480860A (en) * | 1988-12-23 | 1996-01-02 | Petrolite Corporation | Methods for reducing sulfides in sewage gas |
| CA2017047C (en) * | 1989-08-01 | 1999-08-17 | Jerry J. Weers | Method of scavenging hydrogen sulfide from hydrocarbons |
| US5356458A (en) * | 1991-08-12 | 1994-10-18 | Clearwater Industries Corporation | Computerized chemical injection system for hydrogen sulfide control in a waste water stream |
| US6136577A (en) * | 1992-10-30 | 2000-10-24 | Bioengineering Resources, Inc. | Biological production of ethanol from waste gases with Clostridium ljungdahlii |
| US5821111A (en) * | 1994-03-31 | 1998-10-13 | Bioengineering Resources, Inc. | Bioconversion of waste biomass to useful products |
| US5705135A (en) * | 1993-11-04 | 1998-01-06 | Gas Research Institute | Composition and process for the removal of hydrogen sulfide from gaseous streams |
| JP4101295B2 (ja) | 1996-07-01 | 2008-06-18 | バイオエンジニアリング・リソーシズ・インコーポレーテツド | 廃ガスからの酢酸の生物学的生産 |
| US20060236735A1 (en) * | 2005-04-26 | 2006-10-26 | Envirosolv Energy Llc | Integrated hydrogen sulfide absorber system for making potassium-sulfur fertilizer |
| DE602008002999D1 (de) * | 2008-03-17 | 2010-11-25 | Res Inst Petroleum Industry | Verbesserung von Süsslösungen zur Entfernung von Schwefelwasserstoff aus Gasströmen |
| US8702994B2 (en) * | 2009-03-31 | 2014-04-22 | United Laboratories International, Llc | Sodium nitrite oxidation of hydrogen sulfide |
| US8512449B1 (en) | 2010-12-03 | 2013-08-20 | Jacam Chemical Company 2013, Llc | Oil-soluble triazine sulfide scavenger |
| US8993488B2 (en) | 2011-02-24 | 2015-03-31 | United Laboratories International, Llc | Process for removal of hydrogen sulfide in downhole oilfield applications |
| US11286433B2 (en) | 2017-08-01 | 2022-03-29 | Gaps Technology, Llc | Compositions and methods for remediating hydrogen sulfide in hydrocarbon based liquids |
| CN111032091B (zh) * | 2018-04-23 | 2024-04-12 | 盖普斯技术有限责任公司 | 用于治理烃基液体和水溶液中的硫化氢和其他污染物的组合物和方法 |
| CN114367177A (zh) * | 2022-01-14 | 2022-04-19 | 河南工程学院 | 两步反应脱除工业气体中硫化氢的绿色生产方法及装置 |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US676209A (en) * | 1896-02-19 | 1901-06-11 | Hugo Strache | Process of purifying water-gas. |
| DE422726C (de) * | 1923-09-24 | 1925-12-10 | Chemischer Produkte Dr Fritz H | Reduktion von Nitriten unter Gewinnung von Ammoniak, Schwefel und Thiosulfat |
| US2665190A (en) * | 1950-07-28 | 1954-01-05 | Allied Chem & Dye Corp | Purification of waste gases containing chlorine by treatment with an alkaline nitrite solution to effect removal of the chlorine constituent therefrom |
| US3754074A (en) * | 1967-11-20 | 1973-08-21 | North American Rockwell | Removal of nitrogen oxides and other impurities from gaseous mixtures |
| US4151263A (en) * | 1977-07-29 | 1979-04-24 | Air Products And Chemicals, Inc. | Removal of sulfur oxides from gases by scrubbing with ammoniacal solutions |
-
1983
- 1983-11-03 US US06/549,274 patent/US4515759A/en not_active Expired - Lifetime
-
1984
- 1984-06-12 GB GB08414976A patent/GB2148930B/en not_active Expired
- 1984-06-13 NO NO842369A patent/NO161539C/no unknown
- 1984-06-15 DK DK295784A patent/DK295784A/da not_active Application Discontinuation
- 1984-06-22 DE DE19843422967 patent/DE3422967A1/de not_active Withdrawn
- 1984-06-28 NL NL8402057A patent/NL8402057A/nl not_active Application Discontinuation
- 1984-07-05 CA CA000458230A patent/CA1239770A/en not_active Expired
- 1984-10-15 AU AU34234/84A patent/AU582550B2/en not_active Ceased
- 1984-10-23 IT IT23277/84A patent/IT1175895B/it active
- 1984-10-31 BE BE0/213938A patent/BE900963A/fr not_active IP Right Cessation
- 1984-10-31 BR BR8405578A patent/BR8405578A/pt unknown
- 1984-11-02 FR FR8416769A patent/FR2554361B1/fr not_active Expired
- 1984-11-02 JP JP59230493A patent/JPS60118215A/ja active Pending
- 1984-11-12 IN IN777/CAL/84A patent/IN163436B/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| IT8423277A0 (it) | 1984-10-23 |
| GB2148930B (en) | 1987-09-23 |
| IT1175895B (it) | 1987-07-15 |
| BE900963A (fr) | 1985-02-15 |
| US4515759B1 (enExample) | 1989-12-12 |
| NL8402057A (nl) | 1985-06-03 |
| BR8405578A (pt) | 1985-09-10 |
| DK295784D0 (da) | 1984-06-15 |
| GB8414976D0 (en) | 1984-07-18 |
| NO161539C (no) | 1989-08-30 |
| NO842369L (no) | 1985-05-06 |
| FR2554361B1 (fr) | 1988-06-10 |
| JPS60118215A (ja) | 1985-06-25 |
| DK295784A (da) | 1985-05-04 |
| DE3422967A1 (de) | 1985-05-15 |
| US4515759A (en) | 1985-05-07 |
| FR2554361A1 (fr) | 1985-05-10 |
| IN163436B (enExample) | 1988-09-24 |
| GB2148930A (en) | 1985-06-05 |
| AU3423484A (en) | 1985-08-01 |
| NO161539B (no) | 1989-05-22 |
| AU582550B2 (en) | 1989-04-06 |
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