EP1315762A1 - Polyasparaginsäure-konzentrationsbestimmung mittels fluorometrie - Google Patents
Polyasparaginsäure-konzentrationsbestimmung mittels fluorometrieInfo
- Publication number
- EP1315762A1 EP1315762A1 EP01960679A EP01960679A EP1315762A1 EP 1315762 A1 EP1315762 A1 EP 1315762A1 EP 01960679 A EP01960679 A EP 01960679A EP 01960679 A EP01960679 A EP 01960679A EP 1315762 A1 EP1315762 A1 EP 1315762A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- concentration
- water
- systems
- range
- salts
- 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.)
- Withdrawn
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G73/00—Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups C08G12/00 - C08G71/00
- C08G73/06—Polycondensates having nitrogen-containing heterocyclic rings in the main chain of the macromolecule
- C08G73/10—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
- C08G73/1092—Polysuccinimides
-
- 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
- C08F8/30—Introducing nitrogen atoms or nitrogen-containing groups
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G69/00—Macromolecular compounds obtained by reactions forming a carboxylic amide link in the main chain of the macromolecule
- C08G69/02—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids
- C08G69/08—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids derived from amino-carboxylic acids
- C08G69/10—Alpha-amino-carboxylic acids
Definitions
- the present invention relates to a method for carrying out concentration determinations or for online determination of the dosing concentration of polyaspartic acids and / or their salts in aqueous systems.
- Maintaining a constant level of the chemicals used is very important in water treatment. Underdosing a scale inhibitor in a cooling water circuit would possibly result in a reduction in the heat transfer due to calcium salt deposits. The feeding of fresh water makes it necessary to reset the treatment chemicals to the old value and thus also to determine the concentration.
- the analysis of the scale inhibitor is carried out photometrically or titrimetrically. More economical would be a physical process in which a
- Measurement parameter that is linear with the concentration e.g. of the scale inhibitor goes, is measured online and is kept at a constant value by a metering device.
- EP-A 0 485 882 describes the use of a fluorescent label such as e.g. Coumarin or its derivatives labeled polymer described as a scale inhibitor, after correlating the fluorescence intensity with the concentration either automatically or manually corrected to an optimal value.
- a fluorescent label such as e.g. Coumarin or its derivatives labeled polymer described as a scale inhibitor
- EP-A 0475 602 describes a ner process for fluorescent labeling of polyacrylic acid esters or amides by transamidation with fluorescent amines such as e.g. Tryptophan. In the latter case, the incorporation is 76%, using 15 mol% tryptophan. Detection was possible down to 1 pp.
- the object of the present invention was also for polyaspartic acids
- PASP to develop a ner method for determining the concentration in aqueous systems, which allows the concentration of PASP in aqueous systems to be continuously monitored, in order to prevent the occurrence of undesirable deposits in the form of inorganic or organic scales during operation of the system, and thereby prevent To prevent pollution of the water by excessive entry of PASPals scale inhibitor '.
- the monitoring of the scale inhibitor should also work on flowing water flows and should be able to be measured online.
- Fluorometry is a widely used analytical measurement method in which a substance is excited with a light source (xenon lamp) and the intensity of the emitted fluorescent light is measured as a function of the excitation and emission wavelength. Among other things, it is used as fast, cost-effective "on-site analysis”. Fluorescence spectroscopy is a recognized measurement method for measuring entries into water bodies.
- the substances to be detected (active substances in a formulation) are either marked chemically using a marker or identified as a mixture with an added fluorescent marker. The correlation of the fluorescent marker with the actual active ingredient is not always easy. There are problems in the different degradation behavior on the thermal and microbiological side. The assignment also reflects z. B. by complex formation and thus the passive portion of the active ingredient no direct relationship to the marker. Such systems must therefore always be used in higher concentrations than would actually be necessary. Because underdosing of a scale inhibitor would possibly result in a reduction in heat transfer in a cooling water circuit due to calcium deposits on the transfer surfaces.
- thermal polyaspartic acids from maleic anhydride and ammonia have recently been increasingly used as a biodegradable alternative for polyacrylates in many applications. Especially in water treatment, the thermal polyaspartic acid should play a significant role in the
- thermal polyaspartic acids are used as a dispersant.
- fluorescence One of the positive physical properties of thermal polyaspartic acids. They should be able to detect the actual active ingredient without detour. Linear dependencies of the fluorescence intensity on the concentration, the degradation (chemical, physical or biological) or the coating as a dispersant or complexing agent would be desirable.
- the present invention therefore relates to a method for carrying out concentration determinations of polyaspartic acids in aqueous systems by means of fluorometry.
- the method according to the invention is suitable for determining the concentration of the PASP or its salts produced by thermal condensation starting from d, l-aspartic acid or an isomer of aspartic acid and their salts or by thermal condensation of maleic anhydride, ammonia, sodium hydroxide solution and water, and possible maleic anhydride secondary products such as fumaric acid, maleic acid or their salts.
- the method according to the invention is particularly suitable for the analysis of PASP or its salts, which according to the Bayer method according to the protective rights EP-A 0 256 366, EP-A 0 604 813, EP-A 0 612 784, EP-A
- the method according to the invention is suitable for determining the concentration of PASP or its salts in aqueous systems, preferably in aqua desi, tap water, river water, oil / water mixtures and in industrial liquid streams, natural waste water systems, industrial waste water systems such as, for example, paint waste water, building drainage systems and other water systems, such as For example, cleaners, dispersions and formulations with water-based polyaspartic acids, where the deposition or regression of inorganic or organic scales is to be prevented or the removal of which should be sought.
- the method is also suitable for online determination of the dosing concentration, for example in papermaking or petroleum production.
- the method according to the invention is suitable for monitoring the PASP concentrations when it is used as a deposit inhibitor in the evaporation of sugar juices.
- the method according to the invention is also suitable for analyzing polyaspartic acids and / or their salts in aqueous systems or in oil / water systems.
- Possible salts in the context of the present invention are the alkali or alkaline earth metal salts of PASP, preferably the sodium salt.
- the method according to the invention is suitable for determining PASP concentrations over a wide concentration range in the respective aqueous system.
- loading The method is preferably used in the range between 0.1 to 1000 ppm, particularly preferably in the range from 1 to 100 ppm.
- the method according to the invention shows its advantages in the range between 1 and 100 ppm.
- the method according to the invention for determining the PASP concentration by means of fluorometry is suitable for use over a wide temperature range.
- the preferred application range is between 0 and 70 ° C, particularly preferably between 20 and 30 ° C.
- the method according to the invention is suitable for determining the concentration of
- the fluctuation range of the pH value in cooling water circuits is in the order of 1.5 units in the neutral range between pH 6.5 and pH 8, that of river water with an annual average of approx. + 0.5 pH units.
- the signal obtained becomes regular in accordance with its pH and temperature sensitivity converted to a standard value and the actual concentration determined at this corrected value, so that reliable values are obtained even at pH 14.
- Fig. 4 shows the intensity over the entire pH range.
- the fluctuations in the specified range are of the order of 5%.
- the method according to the invention can be operated with any suitable fluorescence spectrometer.
- the analysis and evaluations were carried out on a fluorescence spectrometer of the type AMINCO-Bowman® Series 2 (AB2) from the company
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10042498A DE10042498A1 (de) | 2000-08-30 | 2000-08-30 | Polyasparaginsäure-Konzentrationsbestimmung mittels Fluorometrie |
DE10042498 | 2000-08-30 | ||
PCT/EP2001/009557 WO2002018458A1 (de) | 2000-08-30 | 2001-08-20 | Polyasparaginsäure-konzentrationsbestimmung mittels fluorometrie |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1315762A1 true EP1315762A1 (de) | 2003-06-04 |
Family
ID=7654245
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01960679A Withdrawn EP1315762A1 (de) | 2000-08-30 | 2001-08-20 | Polyasparaginsäure-konzentrationsbestimmung mittels fluorometrie |
Country Status (5)
Country | Link |
---|---|
US (1) | US6989274B2 (de) |
EP (1) | EP1315762A1 (de) |
AU (1) | AU2001282104A1 (de) |
DE (1) | DE10042498A1 (de) |
WO (1) | WO2002018458A1 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FI125111B (en) * | 2013-11-19 | 2015-06-15 | Kemira Oyj | A method for analyzing a sample comprising a first and a second crust inhibitor |
FI125102B (en) * | 2013-11-19 | 2015-06-15 | Kemira Oyj | Method for the determination of an antifouling agent in a sample |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB8401166D0 (en) * | 1984-01-17 | 1984-02-22 | Bevaloid Ltd | Labelled polymer compositions |
DE3626672A1 (de) * | 1986-08-07 | 1988-02-11 | Bayer Ag | Polyasparaginamidsaeure |
US4813973A (en) | 1988-01-11 | 1989-03-21 | The University Of Toronto Innovations Foundation | Modified, water-soluble polymers containing amide groups reacted with xanthydrol and other dyes |
US5216086A (en) | 1990-08-20 | 1993-06-01 | Nalco Chemical Company | Synthesis of tagged polymers by post-polymerization (trans)amidation reaction |
US5128419A (en) | 1990-08-20 | 1992-07-07 | Nalco Chemical Company | Synthesis of tagged polymers by post-polymerization (trans) amidation reaction |
DE4029296A1 (de) * | 1990-09-17 | 1992-03-19 | Forschungszentrum Juelich Gmbh | Verfahren und anordnung zur enzymatischen bestimmung von substanzen mit nichtendstaendigen nad(pfeil hoch)+(pfeil hoch)-abhaengig enzymatisch umsetzbaren gruppen, insb. von aspartam |
WO1992007087A1 (es) * | 1990-10-22 | 1992-04-30 | Universidad De Granada | Procedimiento de hidrolisis y utilizacion de aminoacil-2-naftilamida como reactivo de diagnostico |
EP0485882A1 (de) * | 1990-11-13 | 1992-05-20 | Kurita Water Industries Ltd. | Polymer und Verfahren zur Abwasserbehandlung |
US5292864A (en) | 1992-08-07 | 1994-03-08 | Srchem Incorporated | Decolorizing polyaspartic acid polymers |
US5408028A (en) | 1992-12-22 | 1995-04-18 | Bayer Ag | Copolymers of polyaspartic acid and polycarboxylic acids and polyamines |
DK0745102T3 (da) | 1992-12-22 | 2000-09-25 | Bayer Ag | Copolymerer af polyasparaginsyre og polycarboxylsyrer og polyaminer |
DE4244031A1 (de) | 1992-12-24 | 1994-06-30 | Bayer Ag | Verfahren zur Herstellung und Verwendung von Polyasparaginsäure und ihrer Salze |
US5610255A (en) | 1993-02-22 | 1997-03-11 | Bayer Ag | Process for preparing polysuccinimide and polyaspartic acid |
ATE188497T1 (de) | 1993-11-02 | 2000-01-15 | Bayer Ag | Verfahren zur herstellung von asparaginsäure- haltigen polymeren |
US5493004A (en) | 1994-04-08 | 1996-02-20 | Bayer Ag | Process for the preparation of polysuccinimide |
DE69732154T2 (de) * | 1996-01-18 | 2005-12-15 | Rohm And Haas Co. | Verfahren zum Nachweis von Polymeren in wässerigen Systemen |
JP2000054170A (ja) * | 1998-08-10 | 2000-02-22 | Nippon Shokubai Co Ltd | 金属腐食防止剤 |
-
2000
- 2000-08-30 DE DE10042498A patent/DE10042498A1/de not_active Withdrawn
-
2001
- 2001-08-20 WO PCT/EP2001/009557 patent/WO2002018458A1/de not_active Application Discontinuation
- 2001-08-20 EP EP01960679A patent/EP1315762A1/de not_active Withdrawn
- 2001-08-20 AU AU2001282104A patent/AU2001282104A1/en not_active Abandoned
- 2001-08-24 US US09/939,131 patent/US6989274B2/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO0218458A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE10042498A1 (de) | 2002-04-11 |
US6989274B2 (en) | 2006-01-24 |
AU2001282104A1 (en) | 2002-03-13 |
WO2002018458A1 (de) | 2002-03-07 |
US20020077262A1 (en) | 2002-06-20 |
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Legal Events
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Extension state: AL LT LV MK RO SI |
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RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: BAYER CHEMICALS AG |
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REG | Reference to a national code |
Ref country code: DE Ref legal event code: 8566 |
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RBV | Designated contracting states (corrected) |
Designated state(s): GB |
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RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: LANXESS DEUTSCHLAND GMBH |
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STAA | Information on the status of an ep patent application or granted ep patent |
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