DE2159172C3 - Verfahren zur Verminderung der Kesselsteinabscheidung durch synthetische Polymere - Google Patents
Verfahren zur Verminderung der Kesselsteinabscheidung durch synthetische PolymereInfo
- Publication number
- DE2159172C3 DE2159172C3 DE2159172A DE2159172A DE2159172C3 DE 2159172 C3 DE2159172 C3 DE 2159172C3 DE 2159172 A DE2159172 A DE 2159172A DE 2159172 A DE2159172 A DE 2159172A DE 2159172 C3 DE2159172 C3 DE 2159172C3
- Authority
- DE
- Germany
- Prior art keywords
- water
- solution
- polymer
- molecular weight
- parts
- 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
- 238000000034 method Methods 0.000 title claims description 17
- 230000008021 deposition Effects 0.000 title claims description 7
- 229920001059 synthetic polymer Polymers 0.000 title claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 32
- 229920000141 poly(maleic anhydride) Polymers 0.000 claims description 30
- 150000003839 salts Chemical class 0.000 claims description 14
- 230000007062 hydrolysis Effects 0.000 claims description 7
- 238000006460 hydrolysis reaction Methods 0.000 claims description 7
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 60
- 229920000642 polymer Polymers 0.000 description 32
- 239000000243 solution Substances 0.000 description 31
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 description 17
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 16
- 239000000047 product Substances 0.000 description 15
- 239000000654 additive Substances 0.000 description 13
- 239000002253 acid Substances 0.000 description 12
- 239000000463 material Substances 0.000 description 11
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 9
- 238000010438 heat treatment Methods 0.000 description 8
- 210000004027 cell Anatomy 0.000 description 7
- 239000000203 mixture Substances 0.000 description 7
- 229920001444 polymaleic acid Polymers 0.000 description 7
- 238000002360 preparation method Methods 0.000 description 7
- 239000007787 solid Substances 0.000 description 6
- RYHBNJHYFVUHQT-UHFFFAOYSA-N 1,4-Dioxane Chemical compound C1COCCO1 RYHBNJHYFVUHQT-UHFFFAOYSA-N 0.000 description 5
- 239000004342 Benzoyl peroxide Substances 0.000 description 5
- OMPJBNCRMGITSC-UHFFFAOYSA-N Benzoylperoxide Chemical compound C=1C=CC=CC=1C(=O)OOC(=O)C1=CC=CC=C1 OMPJBNCRMGITSC-UHFFFAOYSA-N 0.000 description 5
- 235000019400 benzoyl peroxide Nutrition 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000000178 monomer Substances 0.000 description 5
- NIQCNGHVCWTJSM-UHFFFAOYSA-N Dimethyl phthalate Chemical compound COC(=O)C1=CC=CC=C1C(=O)OC NIQCNGHVCWTJSM-UHFFFAOYSA-N 0.000 description 4
- 230000000996 additive effect Effects 0.000 description 4
- 239000007864 aqueous solution Substances 0.000 description 4
- 239000013535 sea water Substances 0.000 description 4
- 239000002904 solvent Substances 0.000 description 4
- 238000003756 stirring Methods 0.000 description 4
- 229920000388 Polyphosphate Polymers 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 150000007513 acids Chemical class 0.000 description 3
- 150000008064 anhydrides Chemical group 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000010612 desalination reaction Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000001205 polyphosphate Substances 0.000 description 3
- 235000011176 polyphosphates Nutrition 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 238000001223 reverse osmosis Methods 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 159000000000 sodium salts Chemical class 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- 239000003513 alkali Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000006114 decarboxylation reaction Methods 0.000 description 2
- FBSAITBEAPNWJG-UHFFFAOYSA-N dimethyl phthalate Natural products CC(=O)OC1=CC=CC=C1OC(C)=O FBSAITBEAPNWJG-UHFFFAOYSA-N 0.000 description 2
- 229960001826 dimethylphthalate Drugs 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000011835 investigation Methods 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 238000006116 polymerization reaction Methods 0.000 description 2
- 238000003918 potentiometric titration Methods 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 239000003352 sequestering agent Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- FFRBMBIXVSCUFS-UHFFFAOYSA-N 2,4-dinitro-1-naphthol Chemical compound C1=CC=C2C(O)=C([N+]([O-])=O)C=C([N+]([O-])=O)C2=C1 FFRBMBIXVSCUFS-UHFFFAOYSA-N 0.000 description 1
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-M Bicarbonate Chemical compound OC([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-M 0.000 description 1
- 229910001369 Brass Inorganic materials 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- KKUKTXOBAWVSHC-UHFFFAOYSA-N Dimethylphosphate Chemical compound COP(O)(=O)OC KKUKTXOBAWVSHC-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
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- CERQOIWHTDAKMF-UHFFFAOYSA-M Methacrylate Chemical compound CC(=C)C([O-])=O CERQOIWHTDAKMF-UHFFFAOYSA-M 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 229920002845 Poly(methacrylic acid) Polymers 0.000 description 1
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 1
- 241000700159 Rattus Species 0.000 description 1
- 229920002125 Sokalan® Polymers 0.000 description 1
- 150000008065 acid anhydrides Chemical class 0.000 description 1
- 239000011149 active material Substances 0.000 description 1
- 238000012644 addition polymerization Methods 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
- 239000002518 antifoaming agent Substances 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 125000002843 carboxylic acid group Chemical group 0.000 description 1
- 210000002421 cell wall Anatomy 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000010668 complexation reaction Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000010528 free radical solution polymerization reaction Methods 0.000 description 1
- 150000004678 hydrides Chemical class 0.000 description 1
- 150000002430 hydrocarbons Chemical group 0.000 description 1
- 230000003301 hydrolyzing effect Effects 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 239000000543 intermediate Substances 0.000 description 1
- 238000009533 lab test Methods 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 description 1
- 239000011976 maleic acid Substances 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 238000002103 osmometry Methods 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 239000004584 polyacrylic acid Substances 0.000 description 1
- 239000002685 polymerization catalyst Substances 0.000 description 1
- 239000003505 polymerization initiator Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 230000000979 retarding effect Effects 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F8/00—Chemical modification by after-treatment
- C08F8/12—Hydrolysis
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
- Harvester Elements (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB5676070A GB1369429A (en) | 1970-11-30 | 1970-11-30 | Treatment of water or aqueous systems |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| DE2159172A1 DE2159172A1 (de) | 1972-06-08 |
| DE2159172B2 DE2159172B2 (en:Method) | 1979-05-31 |
| DE2159172C3 true DE2159172C3 (de) | 1984-10-04 |
Family
ID=10477471
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE2159172A Expired DE2159172C3 (de) | 1970-11-30 | 1971-11-29 | Verfahren zur Verminderung der Kesselsteinabscheidung durch synthetische Polymere |
Country Status (19)
| Country | Link |
|---|---|
| US (1) | US3810834A (en:Method) |
| JP (1) | JPS5320475B1 (en:Method) |
| AU (1) | AU469355B2 (en:Method) |
| BE (1) | BE775946A (en:Method) |
| BR (1) | BR7107917D0 (en:Method) |
| CA (1) | CA990871A (en:Method) |
| CY (1) | CY818A (en:Method) |
| DE (1) | DE2159172C3 (en:Method) |
| DK (1) | DK140892B (en:Method) |
| ES (1) | ES397455A1 (en:Method) |
| FR (1) | FR2116139A5 (en:Method) |
| GB (1) | GB1369429A (en:Method) |
| IL (1) | IL38198A (en:Method) |
| IT (1) | IT965581B (en:Method) |
| MT (1) | MTP708B (en:Method) |
| NL (1) | NL175716C (en:Method) |
| PL (1) | PL75225B1 (en:Method) |
| SE (1) | SE380243B (en:Method) |
| ZA (1) | ZA717985B (en:Method) |
Families Citing this family (60)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1374270A (en) * | 1971-12-10 | 1974-11-20 | Ciba Geigy Ag | Polymaleic anhydride compositions and their use |
| US4126549A (en) * | 1973-02-14 | 1978-11-21 | Ciba-Geigy (Uk) Limited | Treatment of water |
| GB1414918A (en) * | 1973-02-14 | 1975-11-19 | Ciba Geigy Uk Ltd | Treatment of water to prevent the deposition of scale |
| US4147647A (en) * | 1973-10-15 | 1979-04-03 | Petrolite Corporation | Scale converters |
| US4018702A (en) * | 1974-03-11 | 1977-04-19 | Calgon Corporation | Corrosion inhibition with amine adducts of maleic anhydride polymers |
| US3965027A (en) * | 1974-03-11 | 1976-06-22 | Calgon Corporation | Scale inhibition and corrosion inhibition |
| US4204953A (en) * | 1974-04-30 | 1980-05-27 | Ciba-Geigy Limited | Process for alkaline scaling |
| US4288327A (en) * | 1975-09-08 | 1981-09-08 | Betz Laboratories, Inc. | Copolymers for the control of the formation and deposition of materials in aqueous mediums |
| GB1539974A (en) * | 1976-11-10 | 1979-02-07 | Ciba Geigy Ag | Method of inhibiting corrosion and scaling of metals in contact with water |
| DE2651438B2 (de) * | 1976-11-11 | 1980-01-24 | Grillo-Werke Ag, 4100 Duisburg | Verwendung eines Zusatzmittels zu Wasser zur Verhinderung von Ansatzbildungen an Heizflächen insbesondere von thermischen Meerwasserentsalzungsanlagen |
| US4048066A (en) * | 1976-11-17 | 1977-09-13 | Chemed Corporation | Method of inhibiting scale |
| US4089893A (en) * | 1976-12-13 | 1978-05-16 | Borg-Warner Corporation | 2,2,2-Tris(hydroxymethyl)ethylphosponic acid and method for its preparation |
| US4065607A (en) * | 1977-03-23 | 1977-12-27 | Pfizer Inc. | Terpolymers of maleic anhydride and their use as scale control agents |
| US4223120A (en) * | 1977-03-23 | 1980-09-16 | Pfizer Inc. | Terpolymers of maleic anhydride and their use as scale control agents |
| US4166040A (en) * | 1977-12-15 | 1979-08-28 | American Cyanamid Company | Compositions comprising mixtures of polycationic and polyanionic polymers as magnesium scale control agents |
| US4166041A (en) * | 1977-12-15 | 1979-08-28 | American Cyanamid Company | Process for magnesium scale control using mixtures of polycationic and polyanionic polymers |
| CH624256GA3 (en:Method) | 1979-01-10 | 1981-07-31 | ||
| FR2446350B1 (fr) * | 1979-01-11 | 1984-08-24 | Ciba Geigy Ag | Procede pour teindre des matieres cellulosiques textiles n'ayant pas ete nettoyees au prealable, preparation et produits utilises a cet effet, et matieres cellulosiques teintes par ce procede |
| US4486581A (en) * | 1979-12-28 | 1984-12-04 | Pfizer Inc. | Use of fumaric acid polymers as antiscalants |
| US4533709A (en) * | 1979-12-28 | 1985-08-06 | Pfizer Inc. | Use of fumaric acid polymers as antiscalants |
| US4351796A (en) * | 1980-02-25 | 1982-09-28 | Ciba-Geigy Corporation | Method for scale control |
| US4297237A (en) * | 1980-03-06 | 1981-10-27 | Calgon Corporation | Polyphosphate and polymaleic anhydride combination for treating corrosion |
| US4446045A (en) * | 1981-04-01 | 1984-05-01 | Betz Laboratories, Inc. | Composition for treating aqueous mediums |
| DE3261833D1 (en) * | 1981-05-30 | 1985-02-21 | Ciba Geigy Ag | Water treatment |
| US4444675A (en) * | 1981-07-16 | 1984-04-24 | Mechanical Equipment Company, Inc. | Alkaline scale abatement |
| US4457847B2 (en) * | 1981-11-05 | 1996-12-31 | Nalco Chemical Co | Carboxylate polymers for internal scale control agents in boiler systems |
| US4452703A (en) * | 1982-02-01 | 1984-06-05 | Calgon Corporation | Control of scale in sugar evaporation equipment |
| US4539353A (en) * | 1983-01-25 | 1985-09-03 | Ciba-Geigy Corporation | Aqueous composition of polymaleic acid, surfactants and complexing agents, and its preparation and use as an assistant in the pretreatment of cellulose-containing fibre materials |
| GB8305346D0 (en) * | 1983-02-25 | 1983-03-30 | Ciba Geigy Ag | Particulate calcium carbonate |
| DE3307507A1 (de) * | 1983-03-03 | 1984-09-06 | Agfa-Gevaert Ag, 5090 Leverkusen | Fotografische entwicklerzusammensetzung |
| US6001772A (en) * | 1983-11-02 | 1999-12-14 | Sotac Corporation | Pesticide and method of making and using same |
| US4634532A (en) * | 1984-05-12 | 1987-01-06 | Calgon Corporation | Orthophosphate-containing desalination scale inhibitors |
| FR2574065B1 (fr) * | 1984-12-04 | 1987-05-07 | Bouet Philippe | Procede antitartre et agent antitartre pour sa mise en oeuvre |
| GB8502499D0 (en) * | 1985-01-31 | 1985-03-06 | Ciba Geigy Ag | Hydrolysed polymaleic anhydride |
| DE3631814A1 (de) * | 1986-09-19 | 1988-03-31 | Basf Ag | Geringfuegig vernetzte, wasserloesliche polymaleinsaeure, verfahren zu deren herstellung und verwendung |
| DE3700535A1 (de) * | 1987-01-10 | 1988-07-21 | Basf Ag | Verfahren zur herstellung von wasserloeslichen copoylmerisaten der maleinsaeure und deren verwendung als wasserbehandlungsmittel |
| US4798683A (en) | 1988-04-21 | 1989-01-17 | Calgon Corporation | Method for controlling corrosion using molybdate compositions |
| US4923782A (en) * | 1988-06-03 | 1990-05-08 | Eastman Kodak Company | Photographic stabilizing bath containing hydrolyzed polymaleic anhydride |
| US4927746A (en) * | 1988-06-03 | 1990-05-22 | Eastman Kodak Company | Photographic stabilizing bath containing polyarcylic acid |
| US5401419A (en) * | 1988-12-12 | 1995-03-28 | Kocib; Sidney Z. | Conservation of water in operating evaporative coolers |
| AU629898B2 (en) * | 1989-02-14 | 1992-10-15 | Fmc Corporation (Uk) Limited | Polymerisation of maleic anhydride |
| US5156744A (en) * | 1989-02-14 | 1992-10-20 | Fmc Corporation | Process for inhibiting scale using maleic anhydride polymerized in reactive aromatic hydrocarbons |
| US5135661A (en) * | 1989-03-21 | 1992-08-04 | Suresh Patel | Process for treating water or aqueous systems |
| DE3915772A1 (de) * | 1989-05-13 | 1990-11-15 | Basf Ag | Verwendung von wasserloeslichen copolymerisaten aus monoethylenisch ungesaettigten carbonsaeuren und vinylimidazol(derivaten) als wasserhandlungsmittel |
| GB9005440D0 (en) * | 1990-03-10 | 1990-05-09 | Ciba Geigy Ag | Composition |
| WO1991018932A1 (en) * | 1990-05-25 | 1991-12-12 | E.I. Du Pont De Nemours And Company | Aqueous solutions of hydrolyzed maleic anhydride copolymers |
| US5336727A (en) * | 1990-07-16 | 1994-08-09 | Tosoh Corporation | Maleic anhydride copolymer |
| DE4239076A1 (de) * | 1992-11-20 | 1994-05-26 | Basf Ag | Mischungen aus Polymerisaten von monoethylenisch ungesättigten Dicarbonsäuren und Polymerisaten ethylenisch ungesättigter Monocarbonsäuren und/oder Polyaminocarbonsäuren und ihre Verwendung |
| DE19503546A1 (de) * | 1995-02-03 | 1996-08-08 | Basf Ag | Wasserlösliche oder wasserdispergierbare Pfropfpolymerisate, Verfahren zu ihrer Herstellung und ihre Verwendung |
| US6243657B1 (en) | 1997-12-23 | 2001-06-05 | Pii North America, Inc. | Method and apparatus for determining location of characteristics of a pipeline |
| US7222672B2 (en) * | 2004-01-16 | 2007-05-29 | Halliburton Energy Services, Inc. | Wellbore fluids containing additives for removing a filter cake and methods of using the same |
| CA2592095C (en) * | 2004-12-24 | 2013-07-30 | Basf Aktiengesellschaft | Use of nonionic surfactants in metal extraction |
| US20080169243A1 (en) * | 2007-01-11 | 2008-07-17 | Dave Bhasker B | Method of inhibiting scale formation and deposition in desalination systems |
| EP2014723A1 (de) | 2007-07-11 | 2009-01-14 | Basf Se | Verfahren zur Herstellung von Korkformkörpern |
| US20090101587A1 (en) * | 2007-10-22 | 2009-04-23 | Peter Blokker | Method of inhibiting scale formation and deposition in desalination systems |
| WO2010122509A2 (en) * | 2009-04-21 | 2010-10-28 | Ecolab Usa Inc. | Methods and apparatus for controlling water hardness |
| KR101505334B1 (ko) | 2010-08-03 | 2015-03-23 | 바스프 에스이 | 연마제용 캐리어 유체 |
| US9193610B2 (en) | 2011-08-10 | 2015-11-24 | Ecolab USA, Inc. | Synergistic interaction of weak cation exchange resin and magnesium oxide |
| KR20140110107A (ko) | 2012-02-01 | 2014-09-16 | 바스프 에스이 | 웨이퍼 제조를 위한 냉각 및/또는 윤활 유체 |
| WO2017063188A1 (en) * | 2015-10-16 | 2017-04-20 | Ecolab Usa Inc. | Maleic anhydride homopolymer and maleic acid homopolymer and the method for preparing the same, and non-phosphorus corrosion inhibitor and the use thereof |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2723956A (en) * | 1950-09-26 | 1955-11-15 | Nat Aluminate Corp | Boiler scale reduction using a copolymer of maleic anhydride and another monoethylenic compound |
| GB772775A (en) * | 1954-06-04 | 1957-04-17 | Monsanto Chemicals | A process for treating hard water |
| US3308067A (en) * | 1963-04-01 | 1967-03-07 | Procter & Gamble | Polyelectrolyte builders and detergent compositions |
| US3463734A (en) * | 1966-06-16 | 1969-08-26 | Monsanto Co | Builders for synthetic detergents |
| NL137604C (en:Method) * | 1968-09-10 |
-
1970
- 1970-11-30 GB GB5676070A patent/GB1369429A/en not_active Expired
-
1971
- 1971-11-22 IL IL38198A patent/IL38198A/xx unknown
- 1971-11-24 AU AU36088/71A patent/AU469355B2/en not_active Expired
- 1971-11-25 NL NLAANVRAGE7116226,A patent/NL175716C/xx not_active IP Right Cessation
- 1971-11-26 IT IT31714/71A patent/IT965581B/it active
- 1971-11-26 SE SE7115158A patent/SE380243B/xx unknown
- 1971-11-26 US US00202628A patent/US3810834A/en not_active Expired - Lifetime
- 1971-11-26 DK DK581171AA patent/DK140892B/da unknown
- 1971-11-29 ES ES397455A patent/ES397455A1/es not_active Expired
- 1971-11-29 ZA ZA717985A patent/ZA717985B/xx unknown
- 1971-11-29 PL PL1971151831A patent/PL75225B1/pl unknown
- 1971-11-29 CY CY818A patent/CY818A/xx unknown
- 1971-11-29 DE DE2159172A patent/DE2159172C3/de not_active Expired
- 1971-11-29 CA CA128,774A patent/CA990871A/en not_active Expired
- 1971-11-29 BE BE775946A patent/BE775946A/xx not_active IP Right Cessation
- 1971-11-29 MT MT708A patent/MTP708B/xx unknown
- 1971-11-29 BR BR7917/71A patent/BR7107917D0/pt unknown
- 1971-11-29 FR FR7142657A patent/FR2116139A5/fr not_active Expired
- 1971-11-30 JP JP9671571A patent/JPS5320475B1/ja active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| AU3608871A (en) | 1973-05-31 |
| DE2159172A1 (de) | 1972-06-08 |
| CA990871A (en) | 1976-06-08 |
| NL175716B (nl) | 1984-07-16 |
| NL7116226A (en:Method) | 1972-06-01 |
| DE2159172B2 (en:Method) | 1979-05-31 |
| AU469355B2 (en) | 1973-05-31 |
| US3810834A (en) | 1974-05-14 |
| SE380243B (sv) | 1975-11-03 |
| IL38198A0 (en) | 1972-01-27 |
| GB1369429A (en) | 1974-10-09 |
| CY818A (en) | 1976-12-01 |
| PL75225B1 (en:Method) | 1974-12-31 |
| IT965581B (it) | 1974-02-11 |
| NL175716C (nl) | 1984-12-17 |
| ES397455A1 (es) | 1975-03-16 |
| JPS5320475B1 (en:Method) | 1978-06-27 |
| ZA717985B (en) | 1973-03-28 |
| DK140892B (da) | 1979-12-03 |
| IL38198A (en) | 1975-04-25 |
| DK140892C (en:Method) | 1980-05-19 |
| MTP708B (en) | 1972-04-13 |
| FR2116139A5 (en:Method) | 1972-07-07 |
| BE775946A (fr) | 1972-05-29 |
| BR7107917D0 (pt) | 1973-04-19 |
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Legal Events
| Date | Code | Title | Description |
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| 8228 | New agent |
Free format text: ZUMSTEIN SEN., F., DR. ASSMANN, E., DIPL.-CHEM. DR.RER.NAT. KLINGSEISEN, F., DIPL.-ING. ZUMSTEIN JUN., F., DIPL.-CHEM. DR.RER.NAT., PAT.-ANW., 8000 MUENCHEN |
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| 8281 | Inventor (new situation) |
Free format text: JONES, THOMAS IVOR, POYNTON, CHESHIRE, GB RICHARDSON, NORMAN, MIDDLETON, MANCHESTER, GB HARRIS, ARTHUR, POYNTON, CHESHIRE, GB |
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| C3 | Grant after two publication steps (3rd publication) |