CN114716032B - Scale and corrosion inhibitor and preparation method thereof - Google Patents
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Abstract
The invention belongs to the technical field of circulating water cooling corrosion and scale inhibitors, and discloses a scale and corrosion inhibitor which is prepared from the following raw materials in parts by weight: 1-5 parts of polysuccinimide, 1-100 parts of 2, 3-diaminopropionic acid, 5-70 parts of N, N-dimethylformamide, 2-50 parts of deionized water, 1-3 parts of sodium hydroxide and 90-1500 parts of absolute ethyl alcohol. The invention takes polysuccinimide and 2, 3-diaminopropionic acid as raw materials to prepare the water-soluble polymer scale and corrosion inhibitor with a large number of carboxyl and amino functional groups in the structure, which can reduce the generation of calcium sulfate scale crystals under low concentration, inhibit the corrosion of copper and effectively prevent scaling and corrosion phenomena.
Description
Technical Field
The invention belongs to the technical field of circulating water cooling corrosion and scale inhibitors, and relates to a scale and corrosion inhibitor and a preparation method thereof.
Background
The industrial circulating cooling water is mainly used for cooling products and equipment so as to play a role in ensuring industrial production efficiency and the like, and circulating cooling water is needed in cooling devices in chemical industries such as pharmacy, oil refining and the like, so that the industrial circulating cooling water occupies a large proportion in the industrial water. However, industrial circulating water contains a large amount of scale-forming ions such as calcium ions, barium ions and the like, and can be deposited on a heat exchange surface after long-term circulating use, so that the heat exchange rate is reduced, and equipment is corroded, and even safety production is endangered. It is therefore necessary to treat the industrial circulating water. The addition of the scale and corrosion inhibitor is one of the effective methods for preventing the scale formation of industrial circulating cooling water and the corrosion of equipment.
Polyaspartic acid (Polyaspartic acid, abbreviated as PASP), which is a polymer formed by condensation and dehydration of amino groups and carboxyl groups of aspartic acid monomers, is a water-soluble macromolecular polypeptide chain, and is a structure similar to protein by extending a molecular chain through peptide bond-CO-NH, and can be decomposed into stable micromolecular nontoxic substances under the action of microorganisms to complete the biodegradation process, so that polyaspartic acid has excellent biodegradability. The water treatment field is the most mature field of polyaspartic acid application, and a green water treatment medicament polyaspartic acid is necessary to replace other water treatments, but some phosphorus-containing water treatment agents still have a large proportion in industrial use. Mainly because polyaspartic acid is relatively expensive compared with other water treatment agents. Therefore, research on modification of polyaspartic acid is one of the routes for promoting the practical implementation of polyaspartic acid.
Disclosure of Invention
The invention aims to provide a scale and corrosion inhibitor and a preparation method thereof, wherein the scale and corrosion inhibitor has a large number of carboxyl and amino functional groups in the structure, can reduce the generation of calcium sulfate scale crystals under low concentration, inhibit the corrosion of copper and effectively prevent scaling and corrosion phenomena.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the invention provides a scale and corrosion inhibitor which is prepared from the following raw materials in parts by weight: 1-5 parts of polysuccinimide, 1-100 parts of 2, 3-diaminopropionic acid, 5-70 parts of N, N-dimethylformamide, 2-50 parts of deionized water, 1-3 parts of sodium hydroxide and 90-1500 parts of absolute ethyl alcohol.
In a preferable technical scheme, the scale and corrosion inhibitor is prepared from the following raw materials in parts by weight: the scale and corrosion inhibitor is prepared from the following raw materials in parts by weight: 5 parts of polysuccinimide, 100 parts of 2, 3-diaminopropionic acid, 70 parts of N, N-dimethylformamide, 50 parts of deionized water, 3 parts of sodium hydroxide and 1500 parts of absolute ethyl alcohol.
The invention also provides a preparation method of the scale and corrosion inhibitor, which comprises the following steps:
1) Weighing the raw materials in parts by weight, adding 2, 3-diaminopropionic acid into a mixed solvent consisting of N, N-dimethylformamide and deionized water, performing ultrasonic treatment for 5min, and transferring into a reactor;
2) Adding polysuccinimide into a reactor, uniformly mixing, heating the solution to 25-60 ℃, dropwise adding sodium hydroxide, adjusting the pH value to 8-9, and reacting for 18-24 h;
3) And after the reaction is finished, adding absolute ethyl alcohol for precipitation, filtering, and then vacuum drying in a constant temperature drying oven at 40-80 ℃ to obtain the polyaspartic acid/2, 3-diaminopropionic acid scale and corrosion inhibitor.
Compared with the prior art, the invention has the beneficial effects that:
the invention takes polysuccinimide and 2, 3-diaminopropionic acid as raw materials to prepare the water-soluble polymer scale and corrosion inhibitor with a large number of carboxyl and amino functional groups in the structure, which can reduce the generation of calcium sulfate scale crystals under low concentration, inhibit the corrosion of copper, and effectively prevent scaling and corrosion phenomena from happening in an industrial circulating water device so as to improve industrial application. The raw materials required by the reaction are natural, pollution-free, environment-friendly and low in price, the operation process is simple and convenient, the prepared scale and corrosion inhibitor has 100% of calcium sulfate scale inhibition efficiency and 95% of copper corrosion inhibition efficiency under low concentration, and the scale and corrosion inhibitor has excellent scale and corrosion inhibition performance and wide application prospect.
Drawings
FIG. 1 is an infrared spectrum of polyaspartic acid/2, 3-diaminopropionic acid scale and corrosion inhibitor and polyaspartic acid prepared in example twelve of the invention.
FIG. 2 is a graph showing the comparison of the scale and corrosion inhibition performance of polyaspartic acid/2, 3-diaminopropionic acid scale and corrosion inhibitor prepared by the invention with the calcium sulfate scale inhibition performance of polyaspartic acid.
FIG. 3 is a scanning electron microscope image of calcium sulfate scale inhibition with the addition of polyaspartic acid/2, 3-diaminopropionic acid scale and corrosion inhibitor of the present invention at a concentration of 2 mg/L.
FIG. 4 is a graph showing the polarization curves of polyaspartic acid scale and corrosion inhibitors at different concentrations in 3.5% NaCl solution.
FIG. 5 is a polarization curve of polyaspartic acid/2, 3-diaminopropionic acid scale and corrosion inhibitor in 3.5% NaCl solution at different concentrations.
Detailed Description
The following examples are illustrative of the present invention and are not intended to limit the scope of the invention. The technical means used in the examples are conventional means well known to those skilled in the art unless otherwise indicated. The test methods in the following examples are conventional methods unless otherwise specified.
The polysuccinimides used in the examples below have molecular weights of 7000 to 8000M W Purchased from Shanghai Meilin Biochemical technologies Co., ltd; 2, 3-diaminopropionic acid was purchased from Shanghai ADammars limited. The invention adopts a graft copolymerization method to prepare the polyaspartic acid/2, 3-diaminopropionic acid scale and corrosion inhibitor. The reaction equation of polyaspartic acid and 2, 3-diaminopropionic acid is as follows:
example 1
1) 1.41g of 2, 3-diaminopropionic acid was added to a mixed solvent of 3ml of N, N-dimethylformamide and 2ml of deionized water, followed by sonication for 10min, and then transferred into a reactor.
2) 0.984g of polysuccinimide was added to the reactor, the mixture was stirred well, the solution was warmed to 25℃and sodium hydroxide solution (about 1ml after the dropwise addition over 2 hours) with a concentration of 40% was added dropwise, the pH was adjusted to 9, and the reaction was carried out for 18 hours.
3) After the reaction is finished, adding 100ml of absolute ethyl alcohol for precipitation, filtering, and then vacuum drying in a constant temperature drying oven at 40 ℃ to obtain the polyaspartic acid/2, 3-diaminopropionic acid scale and corrosion inhibitor. The grafting rate of the polyaspartic acid/2, 3-diaminopropionic acid scale and corrosion inhibitor is 45 percent.
Example two
1) 1.41g of 2, 3-diaminopropionic acid was added to a mixed solvent of 3ml of N, N-dimethylformamide and 2ml of deionized water, followed by sonication for 10min, and then transferred into a reactor.
2) 0.984g of polysuccinimide is added into a reactor, the mixture is uniformly mixed, the temperature of the solution is raised to 40 ℃, sodium hydroxide solution with the concentration of 40 percent (about 1ml after the dropwise addition is finished in 2 hours) is added dropwise, the pH is adjusted to 9, and the reaction is carried out for 18 hours.
3) After the reaction is finished, adding 100ml of absolute ethyl alcohol for precipitation, filtering, and then vacuum drying in a constant temperature drying oven at 40 ℃ to obtain the polyaspartic acid/2, 3-diaminopropionic acid scale and corrosion inhibitor. The grafting ratio of the polyaspartic acid/2, 3-diaminopropionic acid scale and corrosion inhibitor is measured to be 43%.
Example III
1) 1.41g of 2, 3-diaminopropionic acid was added to a mixed solvent of 3ml of N, N-dimethylformamide and 2ml of deionized water, followed by sonication for 10min, and then transferred into a reactor.
2) 0.984g of polysuccinimide is added into a reactor, the mixture is uniformly mixed, the temperature of the solution is raised to 50 ℃, sodium hydroxide solution with the concentration of 40 percent (about 1ml after the dropwise addition is finished in 2 hours) is added dropwise, the pH is adjusted to 9, and the reaction is carried out for 18 hours.
3) After the reaction is finished, adding 100ml of absolute ethyl alcohol for precipitation, filtering, and then vacuum drying in a constant temperature drying oven at 40 ℃ to obtain the polyaspartic acid/2, 3-diaminopropionic acid scale and corrosion inhibitor. The grafting ratio of the polyaspartic acid/2, 3-diaminopropionic acid scale and corrosion inhibitor is measured to be 40%.
Example IV
1) 1.41g of 2, 3-diaminopropionic acid was added to a mixed solvent of 3ml of N, N-dimethylformamide and 2ml of deionized water, followed by sonication for 10min, and then transferred into a reactor.
2) 0.984g of polysuccinimide is added into a reactor, the mixture is uniformly mixed, the temperature of the solution is raised to 60 ℃, sodium hydroxide solution with the concentration of 40 percent (about 1ml after the dropwise addition is finished in 2 hours) is added dropwise, the pH is adjusted to 9, and the reaction is carried out for 18 hours.
3) After the reaction is finished, adding 100ml of absolute ethyl alcohol for precipitation, filtering, and then vacuum drying in a constant temperature drying oven at 40 ℃ to obtain the polyaspartic acid/2, 3-diaminopropionic acid scale and corrosion inhibitor. The grafting ratio of the polyaspartic acid/2, 3-diaminopropionic acid scale and corrosion inhibitor is measured to be 28%.
Example five
1) 1.41g of 2, 3-diaminopropionic acid was added to a mixed solvent of 3ml of N, N-dimethylformamide and 2ml of deionized water, followed by sonication for 10min, and then transferred into a reactor.
2) 0.984g of polysuccinimide is added into a reactor, the mixture is uniformly mixed, the temperature of the solution is raised to 65 ℃, sodium hydroxide solution with the concentration of 40 percent (about l1ml after the dropwise addition is finished in 2 hours) is added dropwise, the pH is adjusted to 9, and the reaction is carried out for 18 hours.
3) After the reaction is finished, adding 100ml of absolute ethyl alcohol for precipitation, filtering, and then vacuum drying in a constant temperature drying oven at 40 ℃ to obtain the polyaspartic acid/2, 3-diaminopropionic acid scale and corrosion inhibitor. The grafting ratio of the polyaspartic acid/2, 3-diaminopropionic acid scale and corrosion inhibitor is 23 percent, which is measured because the grafting ratio of the polymer scale and corrosion inhibitor is reduced due to degradation of the product at the temperature higher than 60 ℃ and is a brown yellow transparent liquid.
Example six
1) 1.41g of 2, 3-diaminopropionic acid was added to a mixed solvent of 3ml of N, N-dimethylformamide and 2ml of deionized water, followed by sonication for 10min, and then transferred into a reactor.
2) 0.984g of polysuccinimide was added to the reactor, the mixture was stirred well, the solution was warmed to 25℃and sodium hydroxide solution (about 1ml after the dropwise addition over 4 hours) with a concentration of 40% was added dropwise, the pH was adjusted to 9, and the reaction was carried out for 18 hours.
3) After the reaction is finished, adding 100ml of absolute ethyl alcohol for precipitation, filtering, and then vacuum drying in a constant temperature drying oven at 40 ℃ to obtain the polyaspartic acid/2, 3-diaminopropionic acid scale and corrosion inhibitor. The grafting ratio of the polyaspartic acid/2, 3-diaminopropionic acid scale and corrosion inhibitor is 45 percent.
Example seven
1) 1.41g of 2, 3-diaminopropionic acid was added to a mixed solvent of 3ml of N, N-dimethylformamide and 2ml of deionized water, followed by sonication for 10min, and then transferred into a reactor.
2) 0.984g of polysuccinimide was added to the reactor, the mixture was stirred well, the solution was warmed to 25℃and sodium hydroxide solution (about 1ml after the dropwise addition over 5 hours) having a concentration of 40% was added dropwise, the pH was adjusted to 9, and the reaction was carried out for 18 hours.
3) After the reaction is finished, adding 100ml of absolute ethyl alcohol for precipitation, filtering, and then vacuum drying in a constant temperature drying oven at 40 ℃ to obtain the polyaspartic acid/2, 3-diaminopropionic acid scale and corrosion inhibitor. The grafting rate of the polyaspartic acid/2, 3-diaminopropionic acid scale and corrosion inhibitor was measured to be 50%, because the sodium hydroxide was too fast to drip, and the product was degraded.
Example eight
1) 1.41g of 2, 3-diaminopropionic acid was added to a mixed solvent of 3ml of N, N-dimethylformamide and 2ml of deionized water, followed by sonication for 10min, and then transferred into a reactor.
2) 0.984g of polysuccinimide was added to the reactor, the mixture was stirred well, the solution was warmed to 25℃and sodium hydroxide solution (about 1ml after the dropwise addition over 2 hours) with a concentration of 40% was added dropwise, the pH was adjusted to 10, and the reaction was carried out for 18 hours.
3) After the reaction is finished, adding 100ml of absolute ethyl alcohol for precipitation, filtering, and then vacuum drying in a constant temperature drying oven at 40 ℃ to obtain the polyaspartic acid/2, 3-diaminopropionic acid scale and corrosion inhibitor. The grafting ratio of the polyaspartic acid/2, 3-diaminopropionic acid scale and corrosion inhibitor is 47 percent.
Example nine
1) 1.41g of 2, 3-diaminopropionic acid was added to a mixed solvent of 3ml of N, N-dimethylformamide and 2ml of deionized water, followed by sonication for 10min, and then transferred into a reactor.
2) 0.984g of polysuccinimide was added to the reactor, the mixture was stirred well, the solution was warmed to 25℃and sodium hydroxide solution (about 1ml after the dropwise addition over 2 hours) with a concentration of 40% was added dropwise, the pH was adjusted to 6, and the reaction was carried out for 18 hours.
3) After the reaction is finished, adding 100ml of absolute ethyl alcohol for precipitation, filtering, and then vacuum drying in a constant temperature drying oven at 40 ℃ to obtain the polyaspartic acid/2, 3-diaminopropionic acid scale and corrosion inhibitor. The grafting ratio of the polyaspartic acid/2, 3-diaminopropionic acid scale and corrosion inhibitor is 20%, which is that the pH is more than 10, the alkalinity is too strong, and the product is degraded and is a brown yellow transparent liquid; the pH value is less than 7, the alkalinity is too low, the polyaspartic acid amide bond is not broken, the polyaspartic acid amide bond does not react with 2, 3-diaminopropionic acid, no target product is generated, and the bottom is white powdery solid. Therefore, the pH is generally adjusted to be slightly alkaline 9, and a yellowish-brown viscous solid product is formed.
Examples ten
1) 7.05g of 2, 3-diaminopropionic acid were added to a mixed solvent of 5ml of N, N-dimethylformamide and 10ml of deionized water and sonicated for 10min, followed by transfer into a reactor.
2) 0.984g of polysuccinimide is added into a reactor, the mixture is uniformly mixed, the temperature of the solution is raised to 25 ℃, sodium hydroxide solution with the concentration of 40 percent (about l1ml after the dropwise addition is finished in 4 hours) is added dropwise, the pH is adjusted to 9, and the reaction is carried out for 24 hours.
3) After the reaction is finished, adding 500ml of absolute ethyl alcohol for precipitation, filtering, and then vacuum drying in a constant temperature drying oven at 60 ℃ to obtain the polyaspartic acid/2, 3-diaminopropionic acid scale and corrosion inhibitor. The grafting ratio of the polyaspartic acid/2, 3-diaminopropionic acid scale and corrosion inhibitor is 65 percent.
Example eleven
1) 11.28g of 2, 3-diaminopropionic acid was added to a mixed solvent of 8ml of N, N-dimethylformamide and 25ml of deionized water, followed by sonication for 10min, and then transferred into a reactor.
2) 0.984g of polysuccinimide is added into a reactor, the mixture is uniformly mixed, the temperature of the solution is raised to 25 ℃, sodium hydroxide solution with the concentration of 40 percent (about 1ml after the dropwise addition is finished within 4 hours) is added dropwise, the pH is adjusted to 9, and the reaction is carried out for 24 hours.
3) After the reaction is finished, adding 1000ml of absolute ethyl alcohol for precipitation, filtering, and then vacuum drying in a constant temperature drying oven at 60 ℃ to obtain the polyaspartic acid/2, 3-diaminopropionic acid scale and corrosion inhibitor. The grafting ratio of the polyaspartic acid/2, 3-diaminopropionic acid scale and corrosion inhibitor is measured to be 74%.
Example twelve
1) 14.1g of 2, 3-diaminopropionic acid was added to a mixed solvent of 10ml of N, N-dimethylformamide and 50ml of deionized water, sonicated for 10min, and then transferred to a reactor.
2) 0.984g of polysuccinimide is added into a reactor, the mixture is uniformly mixed, the temperature of the solution is raised to 25 ℃, sodium hydroxide solution with the concentration of 40 percent (about 1ml after the dropwise addition is finished within 4 hours) is added dropwise, the pH is adjusted to 9, and the reaction is carried out for 24 hours.
3) After the reaction is finished, adding 1500ml of absolute ethyl alcohol for precipitation, filtering, and then vacuum drying in a constant temperature drying oven at 60 ℃ to obtain the polyaspartic acid/2, 3-diaminopropionic acid scale and corrosion inhibitor. The grafting ratio of the polyaspartic acid/2, 3-diaminopropionic acid scale and corrosion inhibitor is 82%, because the increased amount of 2, 3-diaminopropionic acid increases the carboxyl content, and can chelate with more calcium ions.
Comparative example:
polyaspartic acid was synthesized according to the preparation procedure of example twelve without adding 2, 3-diaminopropionic acid in step 1. FIG. 1 is an infrared spectrum of the polyaspartic acid/2, 3-diaminopropionic acid scale and corrosion inhibitor and polyaspartic acid prepared in this example. As can be seen from FIG. 1, at 3417cm -1 、1654cm -1 And 1402cm -1 The sum characteristic absorption peaks of N-H, C =o and C-N in polyaspartic acid appear. In the infrared spectrum of polyaspartic acid/2, 3-diaminopropionic acid, in addition to the absorption peak of polyaspartic acid, the absorption peak was observed at 3292cm -1 Appearance of-NH 3 Is that 2, 3-diaminopropionic acid participates in the ring-opening reaction of polysuccinimide.
The scale and corrosion inhibitor prepared in the twelfth example and the polyaspartic acid prepared in the comparative example are subjected to performance comparison.
(1) And (3) corrosion inhibition performance test: electrochemical corrosion inhibition behaviors of the scale and corrosion inhibitor copper with different concentrations (blank, 5mg/L, 10mg/L and 15 mg/L) are studied by using a CHI 660E electrochemical workstation and adopting a three-electrode electrolytic cell system and using a 298K 3.5% NaCl solution as a corrosion medium. Platinum sheet electrode (2 cm) 2 ) And the saturated calomel electrode is a counter electrode and a reference electrode respectively, and copper coated by epoxy resin is a working electrode. Before the experiment starts, the working electrode is polished by sand paper with different specifications (400-2000 meshes), and then is cleaned by absolute ethyl alcohol and dried by cold air for standby. The reference electrode was connected to the cell via Lu Jinsi capillary. The working electrode was immersed in the etching solution for 1h to obtain a stable open circuit potential. The potentiodynamic polarization test was carried out at 1 mV.multidot.s in the potential range of.+ -.250 mV of the open circuit potential -1 Is measured at the scanning rate of (a). E-i curve obtained by electrokinetic polarization, related corrosion parameters (E corr ) Corrosion current density (i) corr ) Cathode tafel slope (b) c ) And anode tafel slope (b) a ) Fitting the obtained product on a polarization curve by adopting a Tafel extrapolation method. The results of the scale and corrosion inhibitors at different concentrations are shown in Table 1. The corrosion inhibitor molecules form a layer of adsorption film on the metal surface, the adsorption film separates the metal surface from the salt solution, and the electrode reaction cannot be performed on the metal surface part covered by the corrosion inhibitor adsorption film, so that the corrosion of the metal is slowed down. Whereas the electrode reaction proceeds according to the original course in the part not covered with the surface.
TABLE 1 electrochemical polarization parameters obtained for scale and corrosion inhibitors of different concentrations in polarization curves
(2) Calcium sulfate scale resistance performance test: caSO resistance of water treatment agent by static scale inhibition method 4 Scale performance. By CaCl 2 And NaSO 4 Preparing the simulation water to make Ca in the test solution 2+ The concentration is 6800mg/L, SO 4 2- Adding 25mL of 0.026mol/L borax buffer solution into 7100mg/L, carrying out water bath at 70 ℃ for 6h in a constant-temperature water bath kettle, cooling to room temperature of 23 ℃, and calibrating Ca in supernatant by using 0.024mol/L ethylenediamine tetraacetic acid disodium salt standard solution 2+ Is contained in the composition.
FIG. 2 is a graph showing the comparison of the scale and corrosion inhibition performance of polyaspartic acid/2, 3-diaminopropionic acid scale and corrosion inhibitor prepared by the invention with the calcium sulfate scale inhibition performance of polyaspartic acid. As can be seen from FIG. 2, the scale and corrosion inhibitor prepared by the invention has the scale and corrosion inhibition performance obviously higher than that of polyaspartic acid, the scale and corrosion inhibition efficiency reaches 100% at 3mg/L, 75% is improved compared with polyaspartic acid, and the modified polyaspartic acid has better scale and corrosion inhibition performance.
FIG. 3 is a scanning electron microscope image of calcium sulfate scale inhibition with the addition of polyaspartic acid/2, 3-diaminopropionic acid scale and corrosion inhibitor of the present invention at a concentration of 2 mg/L. As can be seen from FIG. 3, after the scale inhibitor is added, functional groups which are electronegative in the molecules of the scale inhibitor and calcium ions with positive charges on the surfaces of insoluble calcium salts generate stronger adsorption action through coulomb interaction, so that scale crystals generate larger degree of distortion, and crystal lattice distortion is caused, so that the scale is not easy to firmly adsorb on the wall, is loosely distributed in water and is easy to be washed away by circulating water.
FIG. 4 is a graph showing the polarization of polyaspartic acid scale and corrosion inhibitors at various concentrations in 3.5% NaCl solution. From fig. 4, it can be seen that the single polyaspartic acid does not form an adsorption layer on the copper surface, and the effect of inhibiting corrosion is not ideal, so that grafting modification is required on the polyaspartic acid side chain to improve the corrosion inhibition performance.
FIG. 5 is a graph showing the polarization of polyaspartic acid/2, 3-diaminopropionic acid scale and corrosion inhibitors of the present invention at various concentrations in 3.5% NaCl solution. From FIG. 5, it can be seen that the addition of the scale and corrosion inhibitor of the present invention causes the polarization curve of the cathode region to move downward, and the larger the concentration, the larger the magnitude of the polarization curve decreases. Compared with the cathode, the anode curve of the polyaspartic acid/2, 3-diaminopropionic acid has obvious change, and the shoulder peak appears between 0.02 and 0.15V. The occurrence of the shoulder formation of Cu (I) -polyaspartic acid/2, 3-diaminopropionic acid complex adsorbed on the copper surface, indicating that more adsorbent was attached to the copper surface, preventing copper corrosion.
The above-mentioned embodiments are merely preferred embodiments of the present invention, which are not intended to limit the scope of the present invention, and other embodiments can be easily made by those skilled in the art through substitution or modification according to the technical disclosure in the present specification, so that all changes and modifications made in the principle of the present invention shall be included in the scope of the present invention.
Claims (1)
1. The preparation method of the scale and corrosion inhibitor is characterized by comprising the following steps:
1) Weighing the following raw materials in parts by weight: 5 parts of polysuccinimide, 100 parts of 2, 3-diaminopropionic acid, 70 parts of N, N-dimethylformamide, 50 parts of deionized water, 3 parts of sodium hydroxide and 1500 parts of absolute ethyl alcohol, adding 2, 3-diaminopropionic acid into a mixed solvent consisting of N, N-dimethylformamide and deionized water, performing ultrasonic treatment for 5min, and transferring into a reactor;
2) Adding polysuccinimide into a reactor, uniformly mixing, heating the solution to 25 ℃, dropwise adding sodium hydroxide, adjusting the pH value to 9 after the dropwise addition is completed within 4 hours, and reacting for 24 hours;
3) And after the reaction is finished, adding absolute ethyl alcohol for precipitation, filtering, and then vacuum drying in a constant temperature drying oven at 40-80 ℃ to obtain the polyaspartic acid/2, 3-diaminopropionic acid scale and corrosion inhibitor.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1206001A (en) * | 1997-05-09 | 1999-01-27 | 赫彻斯特股份公司 | Substituted diaminocarboxylic acids |
| CN101428912A (en) * | 2008-12-10 | 2009-05-13 | 河北省能源研究所 | Biodegradable scale inhibitor-carboxylic acid base-containing poly-asparagic acid derivant and method for producing the same |
| CN104231267A (en) * | 2014-09-05 | 2014-12-24 | 武汉理工大学 | Preparation method and application method of modified polyaspartic acid scale inhibitor |
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| US5053151A (en) * | 1989-05-30 | 1991-10-01 | Exxon Chemical Patents Inc. | Multifunctional viscosity index improver derived from amido-amine exhibiting improved low temperature viscometric properties |
| EP3592761A1 (en) * | 2017-03-09 | 2020-01-15 | University of Lincoln | New antibacterial products |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1206001A (en) * | 1997-05-09 | 1999-01-27 | 赫彻斯特股份公司 | Substituted diaminocarboxylic acids |
| CN101428912A (en) * | 2008-12-10 | 2009-05-13 | 河北省能源研究所 | Biodegradable scale inhibitor-carboxylic acid base-containing poly-asparagic acid derivant and method for producing the same |
| CN104231267A (en) * | 2014-09-05 | 2014-12-24 | 武汉理工大学 | Preparation method and application method of modified polyaspartic acid scale inhibitor |
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