CN118754330B - Turbine circulating water scale inhibition dispersing agent and preparation method thereof - Google Patents
Turbine circulating water scale inhibition dispersing agent and preparation method thereof Download PDFInfo
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- CN118754330B CN118754330B CN202411152127.5A CN202411152127A CN118754330B CN 118754330 B CN118754330 B CN 118754330B CN 202411152127 A CN202411152127 A CN 202411152127A CN 118754330 B CN118754330 B CN 118754330B
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- 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
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- 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
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/08—Corrosion inhibition
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Abstract
The application relates to the field of water treatment, and particularly discloses a circulating water scale inhibition dispersing agent for a steam turbine and a preparation method thereof. The scale inhibition and dispersion agent comprises, by mass, 6-13% of an organic phosphoric acid compound, 1-5% of a water-soluble zinc salt, 10-15% of an acrylic copolymer, 5-12% of a corrosion inhibitor, 1.5-3% of a stabilizer and the balance of water, wherein the comonomer of the acrylic copolymer comprises, by mass, 10-20 parts of unsaturated carboxylic acid, 5-15 parts of olefin with a sulfonic acid group, 10-20 parts of methoxypolyethylene glycol methyl methacrylate and 2-5 parts of divinylbenzene. The scale inhibition dispersing agent has good stability in high-salinity circulating water, is not easy to separate out and precipitate, and can realize excellent scale inhibition effect.
Description
Technical Field
The application relates to the field of water treatment, in particular to a circulating water scale inhibition dispersing agent of a steam turbine and a preparation method thereof.
Background
The cooling water is continuously recycled in the turbine circulating water system, so that heat generated in the operation process of the turbine is effectively reduced, and normal operation of equipment is guaranteed. However, with the continuous use and evaporation of the circulating water, the mineral content in the water gradually increases, especially the hardness salts such as calcium, magnesium, etc., which are extremely easy to deposit on the metal surfaces such as the cooling pipeline, the heat exchanger, the turbine body, etc. under the conditions of high temperature and high pressure, and form a hard scale layer.
The hazards posed by deposited scale to the turbine circulating water system are manifold. First, scale formation greatly reduces heat transfer efficiency, increases energy consumption, and increases equipment operating costs. Secondly, the scale is compact in texture and poor in heat conductivity, local high temperature is easy to form under the scale, corrosion of metal materials is accelerated, and the service life of equipment is shortened. In addition, the deposition of scale can also block up the pipeline, influence the smoothness of rivers, can even lead to equipment trouble or shut down when serious, brings huge loss for production.
In order to solve the problem of deposition and scaling in the circulating water system, a method of adding a scale inhibitor is generally adopted in industry, and the scale inhibitor can convert hardness salts in water into insoluble precipitates or can prevent particulate matters from depositing through adsorption. They not only can effectively prevent the formation of scale, but also can inhibit the formation of scale to a certain extent, protecting production equipment.
However, in the turbine circulating water system, since the cooling water is continuously circulated and evaporated, the salt concentration in the water gradually increases, forming an environment of high salt content. Under the environment, the interaction force among the scale inhibitor molecules is enhanced, and salting-out phenomenon, namely, the scale inhibitor molecules are separated out from the aqueous solution to form solid precipitate, is easy to occur. The salting-out phenomenon not only reduces the solubility of the scale inhibitor in water, but also weakens the scale inhibition dispersion effect of the scale inhibitor, so that the scale inhibitor which originally acts cannot effectively prevent the formation of scale. Therefore, how to improve the stability and the scale inhibition effect of the scale inhibitor in high-salt water diversion is a problem to be solved urgently in the current industrial water treatment field.
Disclosure of Invention
The application provides a circulating water scale inhibition dispersing agent for a steam turbine and a preparation method thereof, aiming at solving the problem that the scale inhibition agent is poor in stability and easy to cause salting-out under the high-concentration salt environment.
In a first aspect, the application provides a turbine circulating water scale inhibition and dispersion agent, which comprises the following components in percentage by mass:
6-13% of organic phosphoric acid compound, 1-5% of water-soluble zinc salt, 10-15% of acrylic copolymer, 5-12% of corrosion inhibitor, 1.5-3% of stabilizer and the balance of water, wherein the comonomer of the acrylic copolymer comprises, by mass, 10-20 parts of unsaturated carboxylic acid, 5-15 parts of olefin with sulfonic acid group, 10-20 parts of methoxypolyethylene glycol methyl methacrylate and 2-5 parts of divinylbenzene.
Preferably, the unsaturated carboxylic acid is one or more of acrylic acid, maleic acid, fumaric acid and itaconic acid.
Preferably, the olefin with a sulfonic acid group is 2-acrylamido-2-methylpropanesulfonic acid, sodium styrene sulfonate, sodium 3-allyloxy-2-hydroxypropanesulfonate, allyl polyethylene glycol sulfonic acid, sodium allyl succinate alkyl sulfonate or 3-allyloxy-2-hydroxypropanesulfonic acid.
The organic phosphoric acid compound is compatible with zinc salt, so that a compact protective film can be rapidly formed on the metal surface of equipment, and the effect of preventing electrochemical corrosion is achieved. In addition, zinc salt can react with carbonate in water to generate zinc carbonate precipitate, so that the generation of calcium carbonate is reduced, and the formation of scale is prevented. The acrylic copolymer prevents insoluble precipitate from being formed by complexing hardness ions (such as calcium and magnesium ions) in water. Therefore, the present solution aims to solve the problem of stability of the acrylic copolymer at high salt concentrations.
For this purpose, the application adopts unsaturated carboxylic acid, olefin with sulfonic acid group, methoxy polyethylene glycol methyl methacrylate and divinylbenzene as comonomers. The olefin with the sulfonic acid group can introduce the sulfonic acid group into the copolymer, has a stronger solvation effect, is beneficial to increasing the hydrodynamic volume and the tackifying effect of the polymer in the aqueous solution, and improves the stability of the polymer in a high-salinity aqueous solution system. The methoxy polyethylene glycol methyl methacrylate and the divinylbenzene respectively play roles of enhancing the steric hindrance effect of a copolymer molecular chain side group and the rigidity of the polymer, obviously increasing the stability of the copolymer in a high-salinity aqueous solution system, reducing salting-out phenomenon and guaranteeing the scale inhibition effect.
Preferably, the acrylic copolymer is prepared by reacting comonomers in the presence of an initiator.
Illustratively, the initiator is dibenzoyl peroxide in an amount of 1% -2% by mass of the comonomer.
Preferably, the olefin with the sulfonic acid group adopts 2-acrylamido-2-methylpropanesulfonic acid and sodium styrene sulfonate with a mass ratio of 1:1-2.
For olefin monomers with sulfonic acid groups, the coordination of the acrylamide groups in the 2-acrylamide-2-methylpropanesulfonic acid and the sulfonic acid groups has stronger scale inhibition and steric hindrance, which is beneficial to improving the scale inhibition rate of the copolymer. However, by adding proper sodium styrene sulfonate, the distribution density of sulfonic acid groups in the copolymer can be improved, which is helpful for improving the stability of the copolymer in high-salinity aqueous solution. Therefore, proper amounts of 2-acrylamido-2-methylpropanesulfonic acid and sodium styrene sulfonate are adopted, and the final scale inhibition performance is more outstanding.
Preferably, the method comprises the steps of, the organic phosphoric acid compound is one or more of hydroxyethylidene diphosphate, diethylenetriamine pentamethylene phosphonate or hexamethylenediamine tetramethylene phosphonate.
Preferably, the water-soluble zinc salt is selected from one or more of zinc chloride, zinc nitrate or zinc sulfate.
Preferably, the raw materials of the scale inhibition and dispersion agent further comprise 2-4% of L-cysteine.
The L-cysteine contains a plurality of coordination groups such as sulfhydryl, amino, carboxyl and the like, and can be rapidly complexed with the metal surface of equipment to form an anti-corrosion protective film. And the L-cysteine can be matched with an organic phosphate compound and zinc salt to form a more compact and stable protective film, so that the corrosion resistance is improved.
Preferably, the corrosion inhibitor is dicarboxyl diphenyl disulfide and azole compound.
Preferably, the azole compound comprises one or more of carboxyl benzotriazole, amino benzothiazole and mercapto benzothiazole.
The azole compound has a nitrogen-containing azole ring, can form a protective film with complexing on the surface of metal, and is added with dicarboxyl diphenyl sulfide to be matched with the azole compound, especially aminobenzothiazole and mercaptobenzothiazole, so that a compact film structure can be formed by crosslinking. In addition, the antibacterial agent has a certain antibacterial effect, can inhibit the propagation of microorganisms, and prevents the probability that the microorganisms secrete extracellular polymers and hardness metal ions interact to form scale films.
Preferably, the stabilizer comprises a nonionic surfactant and polyvinylpyrrolidone.
The stabilizer is used for improving the storage stability of the scale inhibition dispersing agent and reducing the layering precipitation phenomenon of the system. Among them, polyvinylpyrrolidone can improve the storage stability of the system by its thickening effect.
In a second aspect, the application provides a preparation method of a turbine circulating water scale inhibition and dispersion agent, which comprises the following steps of adding water-soluble zinc salt, a stabilizer and a corrosion inhibitor into water, stirring and dissolving, then sequentially adding an organic phosphate compound and an acrylic acid copolymer, and stirring uniformly.
In summary, the application has the following beneficial effects:
The multi-component acrylic acid copolymer obtained by free radical copolymerization has good scale inhibition effect, can be complexed with hardness metal ions such as calcium, magnesium and the like in circulating water, and reduces the formation of a scale layer. Meanwhile, as sulfonic acid groups, long-chain methoxy polyethylene glycol methyl methacrylate and divinylbenzene with crosslinking effect and rigid benzene ring are introduced, the solvation effect, the steric hindrance effect and the rigidity of the copolymer are respectively enhanced, the copolymer is endowed with excellent stability in a high-salinity system, and the scale inhibition and corrosion prevention effects of the copolymer are ensured.
In addition, the corrosion inhibitor adopts dicarboxyl diphenyl disulfide and azole compounds, so that the corrosion resistance of the metal surface of equipment is improved, meanwhile, the propagation of microorganisms is inhibited, the biomembrane scale formed by the combination of extracellular polymers and ions is reduced, and the scale inhibition effect is improved.
Detailed Description
Preparation example
Preparation example 1
The preparation method of the acrylic copolymer comprises the following steps:
3L of isopropanol is added into a reaction vessel, 170g of maleic acid, 75g of 2-acrylamide-2-methylpropanesulfonic acid, 40g of sodium styrene sulfonate, 130g of methoxy polyethylene glycol methyl methacrylate and 40g of divinylbenzene are weighed into the reaction vessel, after stirring and dissolving, nitrogen is filled into the reaction vessel for 30min, and air in the reaction vessel is discharged.
6.8G of dibenzoyl peroxide are weighed out and dissolved in acetone to give a 20% by weight initiator solution. When the temperature of the reaction system was raised to 60 ℃, an initiator solution was pumped into the reaction vessel, and the pumping time was controlled to be 0.5h. After the initiator solution is added, the temperature is raised to 68 ℃ and the reaction is kept for 5 hours. And after the reaction is finished, cooling to room temperature, dropwise adding a sodium hydroxide solution into a reaction system to enable the pH value of the solution to reach 7.5-8.0, discharging, removing the solvent through reduced pressure distillation to obtain a copolymerization product, washing the copolymerization product with diethyl ether, and drying in an oven to constant weight to obtain the product.
Preparation example 2
The preparation method of the acrylic copolymer comprises the following steps:
Adding 3L of isopropanol into a reaction vessel, weighing 110g of maleic acid, 75g of 2-acrylamide-2-methylpropanesulfonic acid, 75g of sodium styrene sulfonate, 100g of methoxy polyethylene glycol methyl methacrylate and 20g of divinylbenzene, adding into the reaction vessel, stirring and dissolving, then charging nitrogen into the reaction vessel for 30min, and discharging air in the reaction vessel.
4.1G of dibenzoyl peroxide are weighed out and dissolved in acetone to give a 20% by weight initiator solution. When the temperature of the reaction system was raised to 50 ℃, an initiator solution was pumped into the reaction vessel, and the pumping time was controlled to be 0.5h. After the initiator solution is added, the temperature is raised to 72 ℃ for heat preservation reaction for 5 hours. And after the reaction is finished, cooling to room temperature, dropwise adding a sodium hydroxide solution into a reaction system to enable the pH value of the solution to reach 7.5-8.0, discharging, removing the solvent through reduced pressure distillation to obtain a copolymerization product, washing the copolymerization product with diethyl ether, and drying in an oven to constant weight to obtain the product.
Preparation example 3
The preparation method of the acrylic copolymer comprises the following steps:
3L of isopropanol is added into a reaction vessel, 200g of acrylic acid, 50g of 2-acrylamide-2-methylpropanesulfonic acid, 30g of sodium styrene sulfonate, 180g of methoxy polyethylene glycol methyl methacrylate and 50g of divinylbenzene are weighed, the mixture is added into the reaction vessel, after stirring and dissolution, nitrogen is filled into the reaction vessel for 30min, and air in the reaction vessel is discharged.
8.0G of dibenzoyl peroxide was weighed out and dissolved in acetone to give a 20% by weight initiator solution. When the temperature of the reaction system was raised to 50 ℃, an initiator solution was pumped into the reaction vessel, and the pumping time was controlled to be 1h. After the initiator solution is added, the temperature is raised to 70 ℃ for heat preservation reaction for 6 hours. And after the reaction is finished, cooling to room temperature, dropwise adding a sodium hydroxide solution into a reaction system to enable the pH value of the solution to reach 7.5-8.0, discharging, removing the solvent through reduced pressure distillation to obtain a copolymerization product, washing the copolymerization product with diethyl ether, and drying in an oven to constant weight to obtain the product.
Preparation example 4
The acrylic acid copolymer differs from preparation 1 in that sodium styrenesulfonate is replaced with an equivalent amount of 2-acrylamido-2-methylpropanesulfonic acid.
Preparation example 5
The acrylic acid copolymer differs from preparation example 1 in that 2-acrylamido-2-methylpropanesulfonic acid is replaced by an equivalent amount of sodium styrenesulfonate.
Preparation example 6
The acrylic acid copolymer differs from preparation example 1 in that 2-acrylamido-2-methylpropanesulfonic acid and sodium styrenesulfonate are replaced with equal amounts of maleic acid.
Preparation example 7
The acrylic acid copolymer differs from preparation 6 in that the methyl methacrylate is replaced with an equivalent amount of methyl methacrylate and methoxy polyethylene glycol methyl methacrylate.
Preparation example 8
The acrylic copolymer differs from preparation 7 in that styrene is replaced with an equivalent amount of divinylbenzene.
Examples
Example 1, a turbine circulating water scale inhibition and dispersion agent, the raw material ratio of each 1kg of product is:
9.5% of an organic phosphoric acid compound, 3.3% of a water-soluble zinc salt, 13.8% of the acrylic copolymer of preparation example 1, 7.5% of a corrosion inhibitor, 2.2% of a stabilizer, 2.6% of L-cysteine and 61.1% of water. Wherein the organic phosphoric acid compound is diethylene triamine pentamethylene phosphonate, the water-soluble zinc salt is zinc chloride, the corrosion inhibitor is prepared from 3,3' -dicarboxyl diphenyl disulfide and aminobenzothiazole with the mass ratio of 1:2, and the stabilizer is prepared from span 60 and polyvinylpyrrolidone with the mass ratio of 1:1.2.
The preparation method comprises the steps of adding water-soluble zinc salt, a stabilizer and a corrosion inhibitor into water at a rotating speed of 300rpm, stirring for 20min at 900rpm, and then sequentially adding an organic phosphoric acid compound, L-cysteine and an acrylic acid copolymer at 300rpm, and stirring for 15min at 500rpm to obtain the turbine circulating water scale inhibition dispersing agent.
Example 2, a turbine circulating water scale inhibition and dispersion agent, the raw material ratio of each 1kg of product is:
6.0% of an organic phosphoric acid compound, 1.5% of a water-soluble zinc salt, 10.8% of the acrylic copolymer of preparation example 2, 12.0% of a corrosion inhibitor, 2.8% of a stabilizer, 4.0% of L-cysteine and 62.9% of water. Wherein the organic phosphoric acid compound is diethylene triamine pentamethylene phosphonate, the water-soluble zinc salt is zinc chloride, the corrosion inhibitor is prepared from 3,3' -dicarboxyl diphenyl disulfide and aminobenzothiazole with the mass ratio of 1:3, and the stabilizer is prepared from tween 80 and polyvinylpyrrolidone with the mass ratio of 1:0.8.
The preparation method comprises the steps of adding water-soluble zinc salt, a stabilizer and a corrosion inhibitor into water at a rotating speed of 300rpm, stirring for 20min at 900rpm, and then sequentially adding an organic phosphoric acid compound, L-cysteine and an acrylic acid copolymer at 300rpm, and stirring for 20min at 500rpm to prepare the turbine circulating water scale inhibition dispersing agent.
Example 3A turbine circulating water scale inhibition and dispersion agent, the raw materials of each 1kg of product comprise 12.4% of organic phosphoric acid compound, 5.0% of water-soluble zinc salt, 15.0% of acrylic acid copolymer of preparation example 3, 5.5% of corrosion inhibitor, 1.5% of stabilizer, 2.0% of L-cysteine and 58.6% of water. Wherein the organic phosphoric acid compound is hydroxyethylidene diphosphate, the water-soluble zinc salt is zinc chloride, the corrosion inhibitor is 3,3' -dicarboxydiphenyl disulfide and mercaptobenzothiazole with the mass ratio of 1:1.5, and the stabilizer is tween 80 and polyvinylpyrrolidone with the mass ratio of 1:1.5.
The preparation method comprises the steps of adding water-soluble zinc salt, a stabilizer and a corrosion inhibitor into water at a rotating speed of 300rpm, stirring for 20min at 1000rpm, and then sequentially adding an organic phosphoric acid compound, L-cysteine and an acrylic acid copolymer at 300rpm, and stirring for 20min at 500rpm to prepare the turbine circulating water scale inhibition dispersing agent.
Example 4, a turbine cycle water scale inhibitor dispersant, differs from example 1 in that the acrylic acid copolymer of preparation 1 was replaced with the acrylic acid copolymer of preparation 4 in equal amount.
Example 5, a turbine cycle water scale inhibiting dispersant, differs from example 1 in that the acrylic copolymer of preparation 1 was replaced with the acrylic copolymer of preparation 5 in equal amounts.
Example 6, a turbine cycle water scale inhibitor dispersant, differs from example 1 in that the L-cysteine is replaced with an equivalent amount of an organophosphate compound.
Example 7, a turbine cycle water scale inhibiting dispersant, differs from example 1 in that the aminobenzothiazole is replaced with an equivalent amount of 3,3' -dicarboxydiphenyl disulfide.
Example 8, a turbine cycle water scale inhibitor dispersant, differs from example 1 in that the equivalent amount of aminobenzothiazole was used in place of 3,3' -dicarboxydiphenyl disulfide.
Example 9, a turbine cycle water scale inhibitor dispersant, differs from example 1 in that polyvinylpyrrolidone was replaced with an equivalent amount of span 60.
Example 10, a turbine cycle water scale inhibitor dispersant, differs from example 1 in that span 60 is replaced with an equivalent amount of polyvinylpyrrolidone.
Comparative example
Comparative example 1, a turbine cycle water scale inhibitor dispersant, differs from example 6 in that the acrylic acid copolymer of preparation example 1 was replaced with the acrylic acid copolymer of preparation example 6 in equal amount.
Comparative example 2, a turbine cycle water scale inhibitor dispersant, differs from example 6 in that the acrylic acid copolymer of preparation example 1 was replaced with the acrylic acid copolymer of preparation example 7 in equal amount.
Comparative example 3, a turbine cycle water scale inhibitor dispersant, differs from example 6 in that the acrylic acid copolymer of preparation example 1 was replaced with the acrylic acid copolymer of preparation example 8 in equal amount.
Comparative example 4, commercially available corrosion and scale inhibitor.
Performance test
1. Scale inhibition performance test
The scale inhibition rate of the scale inhibition dispersant in the above examples or comparative examples was measured under a high salt environment by referring to the specification of GB/T16632-2008. It should be noted that, in order to provide a high salinity test environment, the test solution preparation is adjusted, and the specific preparation method is as follows:
250ml of water was added to a 500ml volumetric flask, and a volume of calcium-dissolving standard solution was added with a burette to give a calcium ion content of 120mg and a sodium ion content of 100mg (titrant was sodium eosin indicator). A pipette was used to add 25.0mL of the sample solution of the water treatment agent. Then 20ml borax buffer solution is added, shaking is carried out, a burette is used for slowly adding a certain volume of sodium bicarbonate standard solution (seeding while adding) so that the amount of bicarbonate ions is 366mg, water is used for diluting to a scale, and shaking is carried out.
2. Corrosion inhibition performance test
The corrosion inhibition rate of the corrosion and scale inhibitor in the above examples or comparative examples was evaluated by testing according to the specification of GB/T18175-2000, and the amount of the corrosion and scale inhibitor was 50mg/L.
3. Storage stability test
Weighing 100g of each scale inhibiting dispersing agent in each example and each 100g of scale inhibiting dispersing agent in each comparative example, respectively filling the scale inhibiting dispersing agents into a sealed glass container, standing for 7d in a 50 ℃ oven, taking out the scale inhibiting dispersing agents, standing for 24h at room temperature, and observing whether layering precipitation occurs.
TABLE 1 Performance test results
As shown in Table 1, compared with the comparative example, the scale inhibiting dispersant of the present application has a better scale inhibiting effect in a high salt environment. The reason for this is probably that the main scale inhibition component acrylic acid copolymer of the application has introduced sulfonic acid group, long-chain E0 group and crosslinking group, which can obviously improve the salting-out resistance of the copolymer and ensure the stability of the copolymer in high-salinity environment and the exertion of the scale inhibition effect.
While the present application has been described with reference to the above-described embodiments, it is to be understood that the same is not limited to the above-described embodiments, but rather that the same is intended to be illustrative only, and that many modifications may be made by one of ordinary skill in the art without departing from the spirit of the application and scope of the appended claims.
Claims (7)
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|---|---|---|---|---|
| EP0184894A1 (en) * | 1984-11-09 | 1986-06-18 | Calgon Corporation | Carboxylic-sulfonic-polyalkylene oxide polymers and their use as scale and corrosion inhibitors |
| US6447717B1 (en) * | 1999-06-04 | 2002-09-10 | Donlar Corporation | Composition and method for inhibition of metal corrosion |
| JP2018009255A (en) * | 2016-07-12 | 2018-01-18 | ハイモ株式会社 | Scale inhibitor and scale inhibition method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5124046A (en) * | 1987-08-03 | 1992-06-23 | Calgon Corporation | Method for controlling calcium carbonate scaling in high pH aqueous 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 |
| CN1235818C (en) * | 2002-12-29 | 2006-01-11 | 淄博矿业集团有限责任公司 | Polynary itaconic acid copolymer as high efficiency anti-sludging agent and preparing method |
| GB0910722D0 (en) * | 2009-06-22 | 2009-08-05 | Unilever Plc | Branched polymer dispersants |
| JP6444105B2 (en) * | 2014-09-17 | 2018-12-26 | 株式会社日本触媒 | Metal corrosion inhibitor for polycarboxylic acid aqueous solution, metal corrosion inhibitor aqueous solution composition, and method for inhibiting metal corrosion of polycarboxylic acid aqueous solution |
| JP6589286B2 (en) * | 2015-02-13 | 2019-10-16 | 栗田工業株式会社 | Initial processing agent for circulating cooling water and initial processing method of circulating cooling water system |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0184894A1 (en) * | 1984-11-09 | 1986-06-18 | Calgon Corporation | Carboxylic-sulfonic-polyalkylene oxide polymers and their use as scale and corrosion inhibitors |
| US6447717B1 (en) * | 1999-06-04 | 2002-09-10 | Donlar Corporation | Composition and method for inhibition of metal corrosion |
| JP2018009255A (en) * | 2016-07-12 | 2018-01-18 | ハイモ株式会社 | Scale inhibitor and scale inhibition method |
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