CH624368A5 - Agent for inhibiting scaling and deposit formation in gas scrubbers. - Google Patents
Agent for inhibiting scaling and deposit formation in gas scrubbers. Download PDFInfo
- Publication number
- CH624368A5 CH624368A5 CH15477A CH15477A CH624368A5 CH 624368 A5 CH624368 A5 CH 624368A5 CH 15477 A CH15477 A CH 15477A CH 15477 A CH15477 A CH 15477A CH 624368 A5 CH624368 A5 CH 624368A5
- Authority
- CH
- Switzerland
- Prior art keywords
- polymer
- stone
- inhibitor
- composition according
- water
- Prior art date
Links
- 230000015572 biosynthetic process Effects 0.000 title claims description 6
- 230000002401 inhibitory effect Effects 0.000 title claims 3
- 229920000642 polymer Polymers 0.000 claims description 38
- 239000007789 gas Substances 0.000 claims description 21
- 238000004140 cleaning Methods 0.000 claims description 20
- 239000004575 stone Substances 0.000 claims description 18
- 239000003112 inhibitor Substances 0.000 claims description 16
- 239000000203 mixture Substances 0.000 claims description 13
- GCLGEJMYGQKIIW-UHFFFAOYSA-H sodium hexametaphosphate Chemical compound [Na]OP1(=O)OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])O1 GCLGEJMYGQKIIW-UHFFFAOYSA-H 0.000 claims description 11
- XHZPRMZZQOIPDS-UHFFFAOYSA-N 2-Methyl-2-[(1-oxo-2-propenyl)amino]-1-propanesulfonic acid Chemical compound OS(=O)(=O)CC(C)(C)NC(=O)C=C XHZPRMZZQOIPDS-UHFFFAOYSA-N 0.000 claims description 8
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 6
- 239000001301 oxygen Substances 0.000 claims description 6
- 229910052760 oxygen Inorganic materials 0.000 claims description 6
- 150000003839 salts Chemical class 0.000 claims description 6
- 239000007921 spray Substances 0.000 claims description 6
- 229910019142 PO4 Inorganic materials 0.000 claims description 5
- 239000003795 chemical substances by application Substances 0.000 claims description 5
- 229920002401 polyacrylamide Polymers 0.000 claims description 5
- TTZMPOZCBFTTPR-UHFFFAOYSA-N O=P1OCO1 Chemical compound O=P1OCO1 TTZMPOZCBFTTPR-UHFFFAOYSA-N 0.000 claims description 4
- 125000004432 carbon atom Chemical group C* 0.000 claims description 4
- 239000000571 coke Substances 0.000 claims description 4
- 229920001467 poly(styrenesulfonates) Polymers 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 claims description 3
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 3
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 3
- 125000003277 amino group Chemical group 0.000 claims description 3
- 229920001577 copolymer Polymers 0.000 claims description 3
- 239000003546 flue gas Substances 0.000 claims description 3
- 239000004571 lime Substances 0.000 claims description 3
- 239000002244 precipitate Substances 0.000 claims description 3
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 2
- 235000019982 sodium hexametaphosphate Nutrition 0.000 claims description 2
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 claims description 2
- 229920003169 water-soluble polymer Polymers 0.000 claims description 2
- UEZVMMHDMIWARA-UHFFFAOYSA-M phosphonate Chemical group [O-]P(=O)=O UEZVMMHDMIWARA-UHFFFAOYSA-M 0.000 claims 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims 2
- 239000007983 Tris buffer Substances 0.000 claims 2
- 239000001257 hydrogen Substances 0.000 claims 2
- 229910052739 hydrogen Inorganic materials 0.000 claims 2
- 239000000126 substance Substances 0.000 claims 2
- 238000003723 Smelting Methods 0.000 claims 1
- 229910000831 Steel Inorganic materials 0.000 claims 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims 1
- 229910052782 aluminium Inorganic materials 0.000 claims 1
- 239000008346 aqueous phase Substances 0.000 claims 1
- 239000010426 asphalt Substances 0.000 claims 1
- 150000001768 cations Chemical class 0.000 claims 1
- 239000013618 particulate matter Substances 0.000 claims 1
- 239000012071 phase Substances 0.000 claims 1
- 239000010452 phosphate Substances 0.000 claims 1
- 125000002467 phosphate group Chemical group [H]OP(=O)(O[H])O[*] 0.000 claims 1
- 238000011084 recovery Methods 0.000 claims 1
- 238000000926 separation method Methods 0.000 claims 1
- 239000010959 steel Substances 0.000 claims 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 19
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 13
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 10
- DBVJJBKOTRCVKF-UHFFFAOYSA-N Etidronic acid Chemical compound OP(=O)(O)C(O)(C)P(O)(O)=O DBVJJBKOTRCVKF-UHFFFAOYSA-N 0.000 description 10
- 229910052742 iron Inorganic materials 0.000 description 9
- 238000001556 precipitation Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 229910000019 calcium carbonate Inorganic materials 0.000 description 5
- 230000005764 inhibitory process Effects 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 235000021317 phosphate Nutrition 0.000 description 4
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 4
- 239000002893 slag Substances 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 3
- 229920006322 acrylamide copolymer Polymers 0.000 description 3
- 239000012736 aqueous medium Substances 0.000 description 3
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 3
- 229910001634 calcium fluoride Inorganic materials 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 229920006158 high molecular weight polymer Polymers 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000002609 medium Substances 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 230000004584 weight gain Effects 0.000 description 3
- 235000019786 weight gain Nutrition 0.000 description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 2
- 229920000388 Polyphosphate Polymers 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 2
- YDONNITUKPKTIG-UHFFFAOYSA-N [Nitrilotris(methylene)]trisphosphonic acid Chemical compound OP(O)(=O)CN(CP(O)(O)=O)CP(O)(O)=O YDONNITUKPKTIG-UHFFFAOYSA-N 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 239000010459 dolomite Substances 0.000 description 2
- 229910000514 dolomite Inorganic materials 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 2
- AMWRITDGCCNYAT-UHFFFAOYSA-L hydroxy(oxo)manganese;manganese Chemical compound [Mn].O[Mn]=O.O[Mn]=O AMWRITDGCCNYAT-UHFFFAOYSA-L 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000001205 polyphosphate Substances 0.000 description 2
- 235000011176 polyphosphates Nutrition 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- PQUXFUBNSYCQAL-UHFFFAOYSA-N 1-(2,3-difluorophenyl)ethanone Chemical compound CC(=O)C1=CC=CC(F)=C1F PQUXFUBNSYCQAL-UHFFFAOYSA-N 0.000 description 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- 201000005569 Gout Diseases 0.000 description 1
- 229910001413 alkali metal ion Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 125000000129 anionic group Chemical group 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 239000010436 fluorite Substances 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 229920001519 homopolymer Polymers 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- QGPQTSCLUYMZHL-UHFFFAOYSA-N iron(3+);oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Fe+3].[Fe+3] QGPQTSCLUYMZHL-UHFFFAOYSA-N 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 description 1
- 150000003014 phosphoric acid esters Chemical class 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- -1 polyphosphates Chemical class 0.000 description 1
- 239000002455 scale inhibitor Substances 0.000 description 1
- 238000005201 scrubbing Methods 0.000 description 1
- 150000004760 silicates Chemical class 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 229940047670 sodium acrylate Drugs 0.000 description 1
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 1
- 235000017557 sodium bicarbonate Nutrition 0.000 description 1
- 235000019830 sodium polyphosphate Nutrition 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 238000011179 visual inspection Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
- C02F5/08—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents
- C02F5/10—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances
- C02F5/14—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances containing phosphorus
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
- C02F5/08—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents
- C02F5/10—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances
- C02F5/14—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances containing phosphorus
- C02F5/145—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances containing phosphorus combined with inorganic substances
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/49—Phosphorus-containing compounds
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Water Supply & Treatment (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- General Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Inorganic Chemistry (AREA)
- Polymers & Plastics (AREA)
- Medicinal Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Treating Waste Gases (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
- Detergent Compositions (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US64725376A | 1976-01-07 | 1976-01-07 | |
| US73372376A | 1976-10-26 | 1976-10-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH624368A5 true CH624368A5 (en) | 1981-07-31 |
Family
ID=27095118
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH15477A CH624368A5 (en) | 1976-01-07 | 1977-01-06 | Agent for inhibiting scaling and deposit formation in gas scrubbers. |
Country Status (15)
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2019826B (en) * | 1978-04-28 | 1982-06-23 | Martin Marietta Corp | Process of removing oxides of sulphur from gases sludge resulting from process and product comprising lime or limestone |
| CA1114978A (en) * | 1978-06-15 | 1981-12-22 | Chih M. Hwa | Sludge conditioning composition for scale inhibition in water |
| JPS55109432A (en) * | 1979-02-19 | 1980-08-22 | Kurita Water Ind Ltd | Deodorizing method |
| US4342733A (en) * | 1981-01-09 | 1982-08-03 | Betz Laboratories, Inc. | Method of improving sulfite antioxidant performance in high solids scrubbers |
| DE3230291A1 (de) * | 1981-08-18 | 1983-03-03 | Dearborn Chemicals Ltd., Widnes, Cheshire | Zusammensetzung zur verhinderung von kesselstein in waessrigen systemen |
| EP0100312A4 (en) * | 1982-01-29 | 1984-07-11 | Dearborn Chemicals Co | METHOD AND COMPOSITION FOR INHIBITING CORROSION OF FERROUS METALS. |
| CA1207211A (en) * | 1982-09-27 | 1986-07-08 | Dionisio G. Cuisia | Composition and method for inhibiting scale |
| US4469663A (en) * | 1982-10-15 | 1984-09-04 | The Dow Chemical Company | Scale control in flue gas desulfurization |
| CA1258963A (en) * | 1983-03-07 | 1989-09-05 | Bennett P. Boffardi | Synergistic scale and corrosion inhibiting admixtures containing carboxylic acid/sulfonic acid polymers |
| DE3317126C2 (de) * | 1983-05-06 | 1986-07-24 | Mannesmann AG, 4000 Düsseldorf | Verfahren zur Vermeidung von Säurekorrosion an Stranggießanlagen |
| US4671934A (en) * | 1986-04-18 | 1987-06-09 | Buckman Laboratories, Inc. | Aminophosphonic acid/phosphate mixtures for controlling corrosion of metal and inhibiting calcium phosphate precipitation |
| US4872996A (en) * | 1987-03-13 | 1989-10-10 | The Dow Chemical Company | Use of aminophosphonic acids to inhibit scale formation and corrosion caused by manganese in water systems |
| EP0311072A3 (en) * | 1987-10-08 | 1989-06-07 | The B.F. Goodrich Company | Stabilization of metal ions and dispersion of particulates in aqueous systems |
| WO2017040283A1 (en) * | 2015-08-28 | 2017-03-09 | Serionix, Inc. | Gas filters for basic contaminants |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1110365A (en) * | 1965-03-29 | 1968-04-18 | Calgon Corp | Inhibition of scale in saline water evaporators |
| FR1544503A (fr) * | 1966-11-16 | 1968-10-31 | Benckiser Gmbh Joh A | Produits détartrants |
| US3630937A (en) * | 1968-05-06 | 1971-12-28 | Calgon Corp | Sulfonated polystyrene compositions and methods of treating boiler water |
| CA952784A (en) * | 1970-08-28 | 1974-08-13 | Chemed Corporation | Scale-inhibiting composition and method |
| US3663448A (en) * | 1970-09-25 | 1972-05-16 | Calgon Corp | Inhibiting scale deposition |
| US3709816A (en) * | 1971-07-01 | 1973-01-09 | Calgon Corp | Control of alluvial and other deposits in aqueous systems |
| US3806367A (en) * | 1972-06-01 | 1974-04-23 | Bitz Lab Inc | Acrylamido-sulfonic acid polymers and their use as rust and tubercle removing agents |
| FR2198106A1 (en) * | 1972-09-04 | 1974-03-29 | Rhone Progil | Corrosion and scale prevention in cooling systems - using phosphates, zinc salts and acrylic polymers |
| DE2248586A1 (de) * | 1972-10-04 | 1974-04-18 | Drew Chem Corp | Verfahren zur abtrennung saurer gase aus solche gase enthaltenden fluiden gemischen |
| US3890228A (en) * | 1973-04-13 | 1975-06-17 | Chemed Corp | Polyacrylate-polyphosphonic acid treatment in aqueous systems |
| US3918935A (en) * | 1973-08-13 | 1975-11-11 | Factory Mutual Res Corp | Non-newtonian liquid and method for wet scrubbing stack gases |
| US3880620A (en) * | 1974-06-19 | 1975-04-29 | Betz Laboratories | Method for scrubbing gases derived from blast furnaces |
-
1976
- 1976-12-15 SE SE7614102A patent/SE435456B/xx not_active IP Right Cessation
- 1976-12-16 DK DK566776A patent/DK153367C/da not_active IP Right Cessation
- 1976-12-17 FI FI763638A patent/FI763638A7/fi not_active Application Discontinuation
- 1976-12-21 NL NLAANVRAGE7614213,A patent/NL185221C/xx not_active IP Right Cessation
- 1976-12-23 NO NO764352A patent/NO144619C/no unknown
- 1976-12-30 BR BR7608838A patent/BR7608838A/pt unknown
- 1976-12-31 IE IE2858/76A patent/IE44558B1/en not_active IP Right Cessation
- 1976-12-31 IT IT52856/76A patent/IT1121700B/it active
-
1977
- 1977-01-04 CA CA269,079A patent/CA1087480A/en not_active Expired
- 1977-01-04 GB GB46/77A patent/GB1532391A/en not_active Expired
- 1977-01-05 FR FR7700135A patent/FR2337694A1/fr active Granted
- 1977-01-05 LU LU76525A patent/LU76525A1/xx unknown
- 1977-01-05 DE DE19772700347 patent/DE2700347A1/de active Granted
- 1977-01-06 CH CH15477A patent/CH624368A5/de not_active IP Right Cessation
- 1977-01-07 JP JP43977A patent/JPS52110288A/ja active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| GB1532391A (en) | 1978-11-15 |
| FI763638A7 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1977-07-08 |
| NO144619C (no) | 1981-10-07 |
| IE44558B1 (en) | 1982-01-13 |
| JPS52110288A (en) | 1977-09-16 |
| DE2700347A1 (de) | 1977-07-14 |
| IE44558L (en) | 1977-07-07 |
| NL185221C (nl) | 1990-02-16 |
| NO764352L (no) | 1977-07-08 |
| CA1087480A (en) | 1980-10-14 |
| DE2700347C2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1989-12-28 |
| SE435456B (sv) | 1984-10-01 |
| IT1121700B (it) | 1986-04-10 |
| NO144619B (no) | 1981-06-29 |
| NL185221B (nl) | 1989-09-18 |
| BR7608838A (pt) | 1977-10-25 |
| DK566776A (da) | 1977-07-08 |
| FR2337694B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1981-12-24 |
| DK153367C (da) | 1989-01-02 |
| SE7614102L (sv) | 1977-07-08 |
| LU76525A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1977-07-15 |
| NL7614213A (nl) | 1977-07-11 |
| DK153367B (da) | 1988-07-11 |
| FR2337694A1 (fr) | 1977-08-05 |
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