A scale inhibitor, its preparation method and application

Abstract

This invention relates to the field of scale inhibitor technology, specifically to a scale inhibitor, its preparation method, and its application. The scale inhibitor comprises the following raw materials in parts by weight: 30-35 parts of acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer, 6-10 parts of polyepoxysuccinic acid, 5-8 parts of polyepoxyethylene fatty alcohol ether, 5-8 parts of sodium dodecylbenzenesulfonate, 4-6 parts of nano zinc oxide, 6-9 parts of metakaolin hybridized filling agent, 5-7 parts of modified nano titanium dioxide agent, 4-6 parts of silane coupling agent KH560, and 30-35 parts of deionized water. The scale inhibitor of this invention utilizes the blending of raw materials to enhance the scale inhibition effect of calcium carbonate and calcium sulfate ions in the product system, as well as optimize the corrosion rate and antibacterial effect. The product exhibits excellent performance coordination and balance, and also demonstrates significant temperature stability.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of scale inhibitors, in particular to a scale inhibitor, a preparation method and application. BACKGROUND

[0002] In industrial production processes, industrial circulating water, boiler water and other water bodies contain metal ions such as calcium, magnesium, barium and strontium, as well as anions such as carbonate, sulfate and phosphate. With the increase of water temperature, evaporation and concentration, these ions are easy to combine to form calcium carbonate, calcium sulfate, calcium phosphate and other scales. The scales adhering to the inner wall of the equipment pipeline can significantly reduce the heat transfer efficiency and increase energy consumption. At the same time, the scales can also cause pipeline blockage, equipment corrosion and other problems, shortening the service life of the equipment. The existing scale inhibitors have low scale inhibition efficiency, poor scale inhibition effect on calcium carbonate and calcium sulfate ions, and poor corrosion rate and poor bacteriostatic effect, and the performance balance of the product is poor, and the temperature stability of the product is not ideal. Therefore, the present application is further improved. SUMMARY

[0003] In view of the defects of the prior art, the purpose of the present application is to provide a scale inhibitor, a preparation method and application to solve the problems raised in the background art.

[0004] The technical problem solved by the present application adopts the following technical scheme:

[0005] The present application provides a scale inhibitor, which comprises the following raw materials by weight:

[0006] Acrylic acid-2-acrylamide-2-methylpropane sulfonic acid copolymer 30-35 parts, polyepoxysuccinic acid 6-10 parts, polyethylene oxide fatty alcohol ether 5-8 parts, sodium dodecyl benzene sulfonate 5-8 parts, nano zinc oxide 4-6 parts, metakaolin hybrid adjusted filler 6-9 parts, modified nano titanium dioxide agent 5-7 parts, silane coupling agent KH560 4-6 parts, deionized water 30-35 parts.

[0007] Preferably, the scale inhibitor comprises the following raw materials by weight:

[0008] Acrylic acid-2-acrylamide-2-methylpropane sulfonic acid copolymer 32.5 parts, polyepoxysuccinic acid 8 parts, polyethylene oxide fatty alcohol ether 6.5 parts, sodium dodecyl benzene sulfonate 6.5 parts, nano zinc oxide 5 parts, metakaolin hybrid adjusted filler 7.5 parts, modified nano titanium dioxide agent 6 parts, silane coupling agent KH560 5 parts, deionized water 32.5 parts.

[0009] Preferably, the preparation method of the metakaolin hybrid adjusted filler is:

[0010] S01: Mix 3-5 parts of sodium stearate, 1-2 parts of silane coupling agent KH550 and 5-8 parts of sodium citrate solution with a mass fraction of 8-12% evenly to obtain sodium stearate solution;

[0011] S02: Metakaolin is first heat-treated at 135-145℃ for 1 hour, then cooled to 55℃ at a rate of 2-5℃ / min, kept at the temperature, and then the kept-temperature metakaolin is stirred evenly in sodium stearate solution with a volume of 5-8 times the total amount of metakaolin to obtain sodium stearate treated metakaolin agent.

[0012] S03: The metakaolin agent treated with sodium stearate and the hybridization regulator were mixed at a weight ratio of (7-11):5 and ball-milled at a speed of 1000-1500 r / min for 2 hours. After ball milling, the mixture was filtered and dried to obtain the hybridized metakaolin liquid.

[0013] S04: The hybridized metakaolin liquid and filler were ball-milled at a mass ratio of (5-8):3, with a ball milling speed of 1250-1350 r / min for 2 hours. After the ball milling was completed, the mixture was filtered and dried to obtain the hybridized metakaolin filler.

[0014] Preferably, the preparation method of the hybrid regulator is as follows:

[0015] 3-5 parts of carbon nanotubes, 2-3 parts of nano-silica, 2-4 parts of hollow glass microspheres and 5-8 parts of chitosan solution are mixed evenly to obtain nano-silica liquid; aluminum borate whiskers and nano-silica liquid are stirred at a weight ratio of 3:(5-7). After stirring, the mixture is filtered and dried to obtain a hybrid regulator.

[0016] Preferably, the chitosan solution has a mass fraction of 3-6%; the stirring speed of the stirring treatment is 350-450 r / min, the stirring time is 1 h, and the stirring temperature is 50-55℃.

[0017] Preferably, the filling material is prepared by: blending and sintering 3-5 parts of nano-lanthanum oxide, 2-3 parts of boron nitride nanosheets and 5-8 parts of illite at a sintering temperature of 520-540℃ for 1 hour, and then sintering to obtain the filling material.

[0018] Preferably, the modified nano-titanium dioxide agent is prepared by:

[0019] S01: Prepare a silane liquid by mixing silane coupling agent KH560, ethanol, water and acetic acid in a weight ratio of (3-5):(7-9):2:(0.1-0.2);

[0020] Nano-titanium dioxide and silane liquid were ultrasonically treated at a weight ratio of 5:(8-9), with an ultrasonic power of 350-400W for 1 hour. After ultrasonic treatment, silane-treated nano-titanium dioxide liquid was obtained.

[0021] S02: Silane-treated nano-titanium dioxide liquid and additives are ball-milled at a weight ratio of (7-11):5, with a ball milling speed of 1000-1500 rpm for 2 hours. After ball milling, the mixture is filtered and dried to obtain modified nano-titanium dioxide agent.

[0022] The preparation method of the additive is as follows:

[0023] S02a: Mix 2-3 parts of silicon carbide, 1-2 parts of nano-diatomite and 5-8 parts of sodium silicate solution evenly to obtain silicon carbide liquid;

[0024] S02b: 2-5 parts β-cyclodextrin, 6-9 parts sodium lignosulfonate solution and 2-3 parts nanocellulose are mixed evenly to obtain β-cyclodextrin agent; β-cyclodextrin agent and silicon carbide liquid are stirred thoroughly at a weight ratio of 3:5, then filtered and dried to obtain additive.

[0025] Preferably, the sodium silicate solution has a mass fraction of 5-8%; the sodium lignosulfonate solution has a mass fraction of 5-10%.

[0026] This invention also provides a method for preparing a scale inhibitor, comprising the following steps:

[0027] Weigh the raw materials according to the specified weight, stir and mix them thoroughly at a stirring speed of 350-400 r / min for 1 hour, and then the scale inhibitor of the present invention is obtained.

[0028] The present invention also provides an application of a scale inhibitor in water scale inhibition.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] The scale inhibitor of this invention uses acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer combined with polyepoxysuccinic acid, polyepoxyethylene fatty alcohol ether, nano zinc oxide and sodium dodecylbenzenesulfonate as the base raw materials, and adds silane coupling agent KH560 as an interface raw material additive. Through the coordination and synergy between the raw materials, the scale inhibition effect of calcium carbonate and calcium sulfate ions in the product system is enhanced, and the corrosion rate and antibacterial effect of the product are optimized. The product has excellent performance coordination and balance, and the product has significant temperature resistance stability.

[0031] The metakaolin hybrid modifier filler uses metakaolin that has undergone thermal modification to optimize its activity. Combined with sodium stearate, silane coupling agent KH550, and sodium citrate, it reduces the surface energy of metakaolin, enhances compatibility with other organic components in the scale inhibitor system (such as acrylic copolymers and polyepoxysuccinic acid), and prevents agglomeration. The provided media system facilitates better interaction and harmonization between the hybrid modifier and filler, optimizing product performance. The hybrid modifier uses carbon nanotubes, nano-silica, and aluminum borate whiskers to form a multi-dimensional nanostructure. This structure captures scale-forming ions in water through physical adsorption and charge interaction, creating a synergistic effect with the chelating components in the scale inhibitor, improving the scale inhibition efficiency against calcium carbonate and calcium sulfate. The introduction of hollow glass microspheres increases the specific surface area of ​​the filler, enhancing its adsorption and dispersion of tiny scale particles, preventing particle aggregation and growth. Furthermore, the multi-dimensional nanostructure provides support and protection for the metal body, reducing corrosion and providing a corrosion inhibitor effect.

[0032] The nano-lanthanum oxide and boron nitride nanosheets in the filler are sintered with illite to form a high-temperature resistant rigid framework structure, which improves the stability of the product in high-temperature water. The sheet-like structure of boron nitride nanosheets can be filled into the product system to further optimize the product's performance and enhance the protection of the product system for metal bodies, reduce the product's corrosion of metal bodies, and play a corrosion inhibition role. In addition, the chitosan solution has antibacterial properties, which, when combined with the system, further enhance the antibacterial properties of the product.

[0033] The modification treatment of silane coupling agent KH560 introduces organic functional groups on the surface of nano-titanium dioxide, reducing its surface energy. At the same time, the polarity of the ethanol-water mixture can be adjusted. Combined with the high-frequency vibration generated by ultrasonic treatment, it effectively breaks the agglomeration of nanoparticles and significantly improves its dispersion uniformity in the scale inhibitor system. The compatibility between silane-treated nano-titanium dioxide and organic polymers in the scale inhibitor is significantly improved, ensuring that each component works synergistically.

[0034] The silicon carbide and nano-diatomaceous earth in the additives possess abundant porous structures and large specific surface areas, which can capture scale-forming ions in water through physical adsorption. They form an "adsorption-dispersion" synergistic effect with nano-titanium dioxide, enhancing the inhibition of scale crystals. The cavity structure and amphiphilic structure of β-cyclodextrin enhance the performance coordination of the product system. Through the mutual improvement of the raw materials, the performance effect of the product is improved. Furthermore, the silicon-oxygen bonds formed during the treatment of sodium silicate solution can enhance the binding strength between the additives and nano-titanium dioxide, thereby optimizing and improving the synergistic effect of the modified nano-titanium dioxide agent and the system. This can optimize the high-temperature stability of the product, coordinate and improve the scale inhibition effect of calcium carbonate and calcium sulfate ions, and optimize the corrosion rate and antibacterial effect of the product. The overall performance coordination and balance of the product is further improved. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to specific examples. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] This embodiment provides a scale inhibitor, which comprises the following raw materials in parts by weight:

[0037] Acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer 30-35 parts, polyepoxysuccinic acid 6-10 parts, polyepoxyethylene fatty alcohol ether 5-8 parts, sodium dodecylbenzenesulfonate 5-8 parts, nano zinc oxide 4-6 parts, metakaolin hybridized filling agent 6-9 parts, modified nano titanium dioxide agent 5-7 parts, silane coupling agent KH560 4-6 parts, deionized water 30-35 parts.

[0038] The scale inhibitor in this embodiment comprises the following raw materials in parts by weight:

[0039] 32.5 parts acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer, 8 parts polyepoxysuccinic acid, 6.5 parts polyepoxyethylene fatty alcohol ether, 6.5 parts sodium dodecylbenzenesulfonate, 5 parts nano zinc oxide, 7.5 parts metakaolin hybridized filler, 6 parts modified nano titanium dioxide agent, 5 parts silane coupling agent KH560, and 32.5 parts deionized water.

[0040] The preparation method of the metakaolin hybridization-adjusting filler in this embodiment is as follows:

[0041] S01: Mix 3-5 parts of sodium stearate, 1-2 parts of silane coupling agent KH550 and 5-8 parts of sodium citrate solution with a mass fraction of 8-12% evenly to obtain sodium stearate solution;

[0042] S02: Metakaolin is first heat-treated at 135-145℃ for 1 hour, then cooled to 55℃ at a rate of 2-5℃ / min, kept at the temperature, and then the kept-temperature metakaolin is stirred evenly in sodium stearate solution with a volume of 5-8 times the total amount of metakaolin to obtain sodium stearate treated metakaolin agent.

[0043] S03: The metakaolin agent treated with sodium stearate and the hybridization regulator were mixed at a weight ratio of (7-11):5 and ball-milled at a speed of 1000-1500 r / min for 2 hours. After ball milling, the mixture was filtered and dried to obtain the hybridized metakaolin liquid.

[0044] S04: The hybridized metakaolin liquid and filler were ball-milled at a mass ratio of (5-8):3, with a ball milling speed of 1250-1350 r / min for 2 hours. After the ball milling was completed, the mixture was filtered and dried to obtain the hybridized metakaolin filler.

[0045] The preparation method of the hybrid regulator in this embodiment is as follows:

[0046] 3-5 parts of carbon nanotubes, 2-3 parts of nano-silica, 2-4 parts of hollow glass microspheres and 5-8 parts of chitosan solution are mixed evenly to obtain nano-silica liquid; aluminum borate whiskers and nano-silica liquid are stirred at a weight ratio of 3:(5-7). After stirring, the mixture is filtered and dried to obtain a hybrid regulator.

[0047] In this embodiment, the chitosan solution has a mass fraction of 3-6%; the stirring speed is 350-450 r / min, the stirring time is 1 h, and the stirring temperature is 50-55℃.

[0048] The preparation method of the filler material in this embodiment is as follows: 3-5 parts of nano-lanthanum oxide, 2-3 parts of boron nitride nanosheets and 5-8 parts of illite are blended and sintered at a temperature of 520-540℃ for 1 hour. After sintering, the filler material is obtained.

[0049] The preparation method of the modified nano-titanium dioxide agent in this embodiment is as follows:

[0050] S01: Prepare a silane liquid by mixing silane coupling agent KH560, ethanol, water and acetic acid in a weight ratio of (3-5):(7-9):2:(0.1-0.2);

[0051] Nano-titanium dioxide and silane liquid were ultrasonically treated at a weight ratio of 5:(8-9), with an ultrasonic power of 350-400W for 1 hour. After ultrasonic treatment, silane-treated nano-titanium dioxide liquid was obtained.

[0052] S02: Silane-treated nano-titanium dioxide liquid and additives are ball-milled at a weight ratio of (7-11):5, with a ball milling speed of 1000-1500 rpm for 2 hours. After ball milling, the mixture is filtered and dried to obtain modified nano-titanium dioxide agent.

[0053] The preparation method of the additive is as follows:

[0054] S02a: Mix 2-3 parts of silicon carbide, 1-2 parts of nano-diatomite and 5-8 parts of sodium silicate solution evenly to obtain silicon carbide liquid;

[0055] S02b: 2-5 parts β-cyclodextrin, 6-9 parts sodium lignosulfonate solution and 2-3 parts nanocellulose are mixed evenly to obtain β-cyclodextrin agent; β-cyclodextrin agent and silicon carbide liquid are stirred thoroughly at a weight ratio of 3:5, then filtered and dried to obtain additive.

[0056] In this embodiment, the sodium silicate solution has a mass fraction of 5-8%; the sodium lignosulfonate solution has a mass fraction of 5-10%.

[0057] The preparation method of a scale inhibitor according to this embodiment includes the following steps:

[0058] Weigh the raw materials according to the specified weight, stir and mix them thoroughly at a stirring speed of 350-400 r / min for 1 hour, and then the scale inhibitor of the present invention is obtained.

[0059] This embodiment describes the application of a scale inhibitor in water scale inhibition.

[0060] Example 1

[0061] This embodiment provides a scale inhibitor, which comprises the following raw materials in parts by weight:

[0062] 30 parts acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer, 6 parts polyepoxysuccinic acid, 5 parts polyepoxyethylene fatty alcohol ether, 5 parts sodium dodecylbenzenesulfonate, 4 parts nano zinc oxide, 6 parts metakaolin hybridized filling agent, 5 parts modified nano titanium dioxide agent, 4 parts silane coupling agent KH560, and 30 parts deionized water.

[0063] The preparation method of the metakaolin hybridization-adjusting filler in this embodiment is as follows:

[0064] S01: Mix 3 parts sodium stearate, 1 part silane coupling agent KH550 and 5 parts sodium citrate solution with a mass fraction of 8% evenly to obtain sodium stearate solution;

[0065] S02: Metakaolin is first heat-treated at 135℃ for 1 hour, then cooled to 55℃ at a rate of 2℃ / min, kept at the temperature, and then the kept-temperature metakaolin is stirred evenly in sodium stearate solution with a volume of 5 times the total amount of metakaolin to obtain sodium stearate treated metakaolin agent.

[0066] S03: The metakaolin agent treated with sodium stearate and the hybridization regulator were mixed at a weight ratio of 7:5 and ball-milled at a speed of 1000 r / min for 2 h. After ball milling, the mixture was filtered and dried to obtain the hybridized metakaolin liquid.

[0067] S04: The hybridized metakaolin liquid and filler were ball-milled at a mass ratio of 5:3 for 2 hours at a speed of 1250 r / min. After the ball milling was completed, the mixture was filtered and dried to obtain the hybridized metakaolin filler.

[0068] The preparation method of the hybrid regulator in this embodiment is as follows:

[0069] Three parts of carbon nanotubes, two parts of nano-silica, two parts of hollow glass microspheres, and five parts of chitosan solution were mixed evenly to obtain nano-silica liquid. Aluminum borate whiskers and nano-silica liquid were stirred at a weight ratio of 3:5. After stirring, the mixture was filtered and dried to obtain a hybrid regulator.

[0070] In this embodiment, the chitosan solution has a mass fraction of 3%; the stirring speed is 350 r / min, the stirring time is 1 h, and the stirring temperature is 50 °C.

[0071] The preparation method of the filler material in this embodiment is as follows: 3 parts of nano-lanthanum oxide, 2 parts of boron nitride nanosheets and 5 parts of illite are blended and sintered at a temperature of 520°C for 1 hour. After sintering, the filler material is obtained.

[0072] The preparation method of the modified nano-titanium dioxide agent in this embodiment is as follows:

[0073] S01: Prepare a silane solution by mixing silane coupling agent KH560, ethanol, water and acetic acid in a weight ratio of 3:7:2:0.1;

[0074] Nano-titanium dioxide and silane liquid were ultrasonically treated at a weight ratio of 5:8, with an ultrasonic power of 350W for 1 hour. After ultrasonic treatment, silane-treated nano-titanium dioxide liquid was obtained.

[0075] S02: Silane-treated nano-titanium dioxide liquid and additives were ball-milled at a weight ratio of 7:5, with a ball milling speed of 1000 rpm for 2 hours. After ball milling, the mixture was filtered and dried to obtain modified nano-titanium dioxide agent.

[0076] The preparation method of the additive is as follows:

[0077] S02a: Mix 2 parts silicon carbide, 1 part nano diatomaceous earth and 5 parts sodium silicate solution evenly to obtain silicon carbide liquid;

[0078] S02b: 2 parts β-cyclodextrin, 6 parts sodium lignosulfonate solution and 2 parts nanocellulose are mixed evenly to obtain β-cyclodextrin agent; the β-cyclodextrin agent and silicon carbide liquid are stirred thoroughly at a weight ratio of 3:5, then filtered and dried to obtain additive.

[0079] In this embodiment, the sodium silicate solution has a mass fraction of 5%; the sodium lignosulfonate solution has a mass fraction of 5%.

[0080] The preparation method of a scale inhibitor according to this embodiment includes the following steps:

[0081] Weigh the raw materials according to the specified weight, stir and mix them thoroughly at a stirring speed of 350 r / min for 1 hour, and then the scale inhibitor of the present invention is obtained.

[0082] This embodiment describes the application of a scale inhibitor in water scale inhibition.

[0083] Example 2

[0084] This embodiment provides a scale inhibitor, which comprises the following raw materials in parts by weight:

[0085] 35 parts of acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer, 10 parts of polyepoxysuccinic acid, 8 parts of polyepoxyethylene fatty alcohol ether, 8 parts of sodium dodecylbenzenesulfonate, 6 parts of nano zinc oxide, 9 parts of metakaolin hybridized filling agent, 7 parts of modified nano titanium dioxide agent, 6 parts of silane coupling agent KH560, and 35 parts of deionized water.

[0086] The scale inhibitor in this embodiment comprises the following raw materials in parts by weight:

[0087] The preparation method of the metakaolin hybridization-adjusting filler in this embodiment is as follows:

[0088] S01: Mix 5 parts of sodium stearate, 2 parts of silane coupling agent KH550 and 8 parts of sodium citrate solution with a mass fraction of 12% to obtain sodium stearate solution;

[0089] S02: Metakaolin is first heat-treated at 145℃ for 1 hour, then cooled to 55℃ at a rate of 5℃ / min, kept at the temperature, and then the kept-temperature metakaolin is stirred evenly in sodium stearate solution with a volume of 8 times the total amount of metakaolin to obtain sodium stearate treated metakaolin agent.

[0090] S03: The metakaolin agent treated with sodium stearate and the hybridization regulator were mixed at a weight ratio of 11:5 and ball-milled at a speed of 1500 r / min for 2 h. After ball milling, the mixture was filtered and dried to obtain the hybridized metakaolin liquid.

[0091] S04: The hybridized metakaolin liquid and filler were ball-milled at a mass ratio of 8:3 for 2 hours at a speed of 1350 r / min. After the ball milling was completed, the mixture was filtered and dried to obtain the hybridized metakaolin filler.

[0092] The preparation method of the hybrid regulator in this embodiment is as follows:

[0093] Five parts of carbon nanotubes, three parts of nano-silica, four parts of hollow glass microspheres, and eight parts of chitosan solution were mixed evenly to obtain nano-silica liquid. Aluminum borate whiskers and nano-silica liquid were stirred at a weight ratio of 3:7. After stirring, the mixture was filtered and dried to obtain a hybrid regulator.

[0094] In this embodiment, the chitosan solution has a mass fraction of 6%; the stirring speed is 450 r / min, the stirring time is 1 h, and the stirring temperature is 55℃.

[0095] The preparation method of the filler material in this embodiment is as follows: 5 parts of nano-lanthanum oxide, 3 parts of boron nitride nanosheets and 8 parts of illite are blended and sintered at a temperature of 540°C for 1 hour. After sintering, the filler material is obtained.

[0096] The preparation method of the modified nano-titanium dioxide agent in this embodiment is as follows:

[0097] S01: Prepare a silane solution by mixing silane coupling agent KH560, ethanol, water and acetic acid in a weight ratio of 5:9:2:0.2;

[0098] Nano-titanium dioxide and silane liquid were ultrasonically treated at a weight ratio of 5:9, with an ultrasonic power of 400W for 1 hour. After ultrasonic treatment, silane-treated nano-titanium dioxide liquid was obtained.

[0099] S02: Silane-treated nano-titanium dioxide liquid and additives were ball-milled at a weight ratio of 11:5, with a ball milling speed of 1500 rpm for 2 hours. After ball milling, the mixture was filtered and dried to obtain modified nano-titanium dioxide agent.

[0100] The preparation method of the additive is as follows:

[0101] S02a: Mix 3 parts silicon carbide, 2 parts nano diatomaceous earth and 8 parts sodium silicate solution evenly to obtain silicon carbide liquid;

[0102] S02b: 5 parts β-cyclodextrin, 9 parts sodium lignosulfonate solution and 3 parts nanocellulose are mixed evenly to obtain β-cyclodextrin agent; the β-cyclodextrin agent and silicon carbide liquid are stirred thoroughly at a weight ratio of 3:5, then filtered and dried to obtain additive.

[0103] In this embodiment, the sodium silicate solution has a mass fraction of 8%, and the sodium lignosulfonate solution has a mass fraction of 10%.

[0104] The preparation method of a scale inhibitor according to this embodiment includes the following steps:

[0105] Weigh the raw materials according to the specified weight, stir and mix them thoroughly at a stirring speed of 400 r / min for 1 hour, and then the scale inhibitor of the present invention is obtained.

[0106] This embodiment describes the application of a scale inhibitor in water scale inhibition.

[0107] Example 3

[0108] This embodiment provides a scale inhibitor, which comprises the following raw materials in parts by weight:

[0109] 32.5 parts acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer, 8 parts polyepoxysuccinic acid, 6.5 parts polyepoxyethylene fatty alcohol ether, 6.5 parts sodium dodecylbenzenesulfonate, 5 parts nano zinc oxide, 7.5 parts metakaolin hybridized filler, 6 parts modified nano titanium dioxide agent, 5 parts silane coupling agent KH560, and 32.5 parts deionized water.

[0110] The preparation method of the metakaolin hybridization-adjusting filler in this embodiment is as follows:

[0111] S01: Mix 4 parts of sodium stearate, 1.5 parts of silane coupling agent KH550 and 6.5 parts of sodium citrate solution with a mass fraction of 10% evenly to obtain sodium stearate solution;

[0112] S02: Metakaolin is first heat-treated at 140℃ for 1 hour, then cooled to 55℃ at a rate of 3.5℃ / min, kept at the temperature, and then the kept-temperature metakaolin is stirred evenly in sodium stearate solution with a volume of 6.5 times the total amount of metakaolin to obtain sodium stearate treated metakaolin agent.

[0113] S03: The metakaolin agent treated with sodium stearate and the hybridization regulator were mixed at a weight ratio of 9:5 and ball-milled at a speed of 1250 r / min for 2 h. After ball milling, the mixture was filtered and dried to obtain the hybridized metakaolin liquid.

[0114] S04: The hybridized metakaolin liquid and filler were ball-milled at a mass ratio of 6.5:3 for 2 hours at a speed of 1300 r / min. After the ball milling was completed, the mixture was filtered and dried to obtain the hybridized metakaolin filler.

[0115] The preparation method of the hybrid regulator in this embodiment is as follows:

[0116] Four parts of carbon nanotubes, 2.5 parts of nano-silica, 3 parts of hollow glass microspheres, and 6.5 parts of chitosan solution were mixed evenly to obtain nano-silica liquid. Aluminum borate whiskers and nano-silica liquid were stirred at a weight ratio of 3:6. After stirring, the mixture was filtered and dried to obtain a hybrid regulator.

[0117] In this embodiment, the chitosan solution has a mass fraction of 4.5%; the stirring speed is 400 r / min, the stirring time is 1 h, and the stirring temperature is 52.5℃.

[0118] The filling material in this embodiment is prepared by blending 4 parts of nano-lanthanum oxide, 2.5 parts of boron nitride nanosheets and 6.5 parts of illite and sintering them at a temperature of 530°C for 1 hour. After sintering, the filling material is obtained.

[0119] The preparation method of the modified nano-titanium dioxide agent in this embodiment is as follows:

[0120] S01: Prepare a silane liquid by mixing silane coupling agent KH560, ethanol, water and acetic acid in a weight ratio of 4:8:2:0.15;

[0121] Nano-titanium dioxide and silane solution were ultrasonically treated at a weight ratio of 5:8.5 with an ultrasonic power of 375W for 1 hour. After ultrasonic treatment, silane-treated nano-titanium dioxide solution was obtained.

[0122] S02: Silane-treated nano-titanium dioxide liquid and additives were ball-milled at a weight ratio of 9:5, with a ball milling speed of 1250 rpm for 2 hours. After ball milling, the mixture was filtered and dried to obtain modified nano-titanium dioxide agent.

[0123] The preparation method of the additive is as follows:

[0124] S02a: Mix 2.5 parts silicon carbide, 1.5 parts nano diatomaceous earth and 6.5 parts sodium silicate solution evenly to obtain silicon carbide liquid;

[0125] S02b: 3.5 parts β-cyclodextrin, 7.5 parts sodium lignosulfonate solution and 2.5 parts nanocellulose are mixed evenly to obtain β-cyclodextrin agent; β-cyclodextrin agent and silicon carbide liquid are stirred thoroughly at a weight ratio of 3:5, then filtered and dried to obtain additive.

[0126] In this embodiment, the sodium silicate solution has a mass fraction of 6.5%, and the sodium lignosulfonate solution has a mass fraction of 7.5%.

[0127] The preparation method of a scale inhibitor according to this embodiment includes the following steps:

[0128] Weigh the raw materials according to the specified weight, stir and mix them thoroughly at a stirring speed of 370 r / min for 1 hour, and then the scale inhibitor of the present invention is obtained.

[0129] This embodiment describes the application of a scale inhibitor in water scale inhibition.

[0130] Comparative Example 1

[0131] Unlike Example 3, no metakaolin hybridization adjustment filler was added.

[0132] Comparative Example 2

[0133] Unlike Example 3, no hybridization regulator was added in the preparation of the metakaolin hybridization-modified filling agent.

[0134] Comparative Example 3

[0135] Unlike Example 3, no nano-silica liquid was added in the preparation of the hybrid regulator.

[0136] Comparative Example 4

[0137] Unlike Example 3, carbon nanotubes and nano-silica were not added in the preparation of the nano-silica liquid.

[0138] Comparative Example 5

[0139] Unlike Example 3, no filler material was added in the preparation of the metakaolin hybridization-adjusted filler.

[0140] Comparative Example 6

[0141] Unlike Example 3, no nano-lanthanum oxide or boron nitride nanosheets were added to the filler material.

[0142] Comparative Example 7

[0143] Unlike Example 3, the metakaolin hybridization modifier was prepared without the addition of sodium stearate-treated metakaolin.

[0144] Comparative Example 8

[0145] Unlike Example 3, no heat-insulating metakaolin was added in the preparation of the sodium stearate-treated metakaolin agent.

[0146] Comparative Example 9

[0147] Unlike Example 3, no modified nano-titanium dioxide agent was added.

[0148] Comparative Example 10

[0149] Unlike Example 3, no additives were added during the preparation of the modified nano-titanium dioxide agent.

[0150] Comparative Example 11

[0151] Unlike Example 3, the nano-titanium dioxide liquid prepared by the modified nano-titanium dioxide agent did not contain silane treatment.

[0152] Comparative Example 12

[0153] Unlike Example 3, no nano-titanium dioxide was added in the preparation of the silane-treated nano-titanium dioxide liquid.

[0154] Routine tests were conducted, including testing the product performance of Examples 1-3 and Comparative Examples 1-12, testing the scale inhibition properties of calcium carbonate and calcium sulfate ions, and testing the corrosion rate (corrosion rate: refer to GBT18175-2000 "Determination of Corrosion Inhibition Performance of Water Treatment Agents - Rotary Coating Method" to test the static corrosion inhibition performance of the mixed corrosion and scale inhibitor samples) and antibacterial effect. Simultaneously, the product's temperature stability was tested (the product was placed at 65℃ for 24 hours, and the product was treated at 85℃ for 24 hours to test its temperature stability). The test results are shown in Tables 1 and 2.

[0155] Table 1

[0156]

[0157] Table 2

[0158]

[0159] As can be seen from Comparative Examples 1-12 and Examples 1-3;

[0160] The product in Example 3 has excellent scale inhibition properties of calcium carbonate and calcium sulfate ions, as well as corrosion inhibition and antibacterial properties. At the same time, the product has excellent stability in temperature-resistant environments at 65°C and 85°C.

[0161] As can be seen from Comparative Examples 1-12 and Example 3, the performance of the products tends to deteriorate when neither the metakaolin hybrid modifier nor the modified nano-titanium dioxide agent is added, especially at 65℃ and 85℃, where the performance stability of the products deteriorates significantly. The product performance is most significantly improved when the metakaolin hybrid modifier and the modified nano-titanium dioxide agent are blended and synergistically combined.

[0162] In the preparation of the metakaolin hybrid-modified filling agent, no hybrid regulator was added; no nano-silica liquid was added in the preparation of the hybrid regulator; no carbon nanotubes or nano-silica were added in the preparation of the nano-silica liquid; no filling material was added in the preparation of the metakaolin hybrid-modified filling agent; no nano-lanthanum oxide or boron nitride nanosheets were added in the filling material; no sodium stearate-treated metakaolin agent was added in the preparation of the metakaolin hybrid-modified filling agent; and no heat-insulating metakaolin was added in the preparation of the sodium stearate-treated metakaolin agent. The performance of the products all showed a certain degree of deterioration. The hybrid regulator, filling material, and metakaolin hybrid-modified filling agent prepared by using the specific method of this invention, combined with sodium stearate-treated metakaolin agent, showed the most significant performance improvement. At the same time, the temperature resistance stability of the product was significantly worse when no filling material was added in the preparation of the metakaolin hybrid-modified filling agent. The addition of filling material significantly improved the temperature resistance stability of the product.

[0163] In the preparation of modified nano-titanium dioxide, no additives were added. In the preparation of modified nano-titanium dioxide, no silane-treated nano-titanium dioxide liquid was added. In the preparation of silane-treated nano-titanium dioxide liquid, no nano-titanium dioxide was added. The performance of the products all showed a different degree of deterioration. In particular, the performance deterioration was more obvious in the absence of additives.

[0164] Given that additives significantly alter product performance, further research is needed:

[0165] The preparation method of the additive is as follows:

[0166] S02a: Mix 2.5 parts silicon carbide, 1.5 parts nano diatomaceous earth and 6.5 parts sodium silicate solution evenly to obtain silicon carbide liquid;

[0167] S02b: 3.5 parts β-cyclodextrin, 7.5 parts sodium lignosulfonate solution and 2.5 parts nanocellulose are mixed evenly to obtain β-cyclodextrin agent; β-cyclodextrin agent and silicon carbide liquid are stirred thoroughly at a weight ratio of 3:5, then filtered and dried to obtain additive.

[0168] Experimental Example 1

[0169] Same as Example 3, except that β-cyclodextrin was not added during the preparation of the additive.

[0170] Experiment Example 2

[0171] Same as Example 3, except that β-cyclodextrin and nanocellulose were not added in the preparation of the β-cyclodextrin agent.

[0172] Experimental Example 3

[0173] Same as Example 3, except that silicon carbide liquid was not added during the preparation of the additive.

[0174] Experiment Example 4

[0175] Same as Example 3, except that no silicon carbide or nano-diatomaceous earth was added to the silicon carbide liquid.

[0176] Experimental Example 5

[0177] Same as Example 3, except that water was used instead of sodium silicate solution.

[0178] The product performance tests for Experiment Examples 1-5 are as follows:

[0179]

[0180] As can be seen from Experiments 1-5, the performance of the products showed a significant downward trend when silicon carbide liquid was not added during the preparation of the additives, or when β-cyclodextrin was not added during the preparation of the additives. In addition, the performance of the products also showed a downward trend when β-cyclodextrin and nanocellulose were not added during the preparation of the β-cyclodextrin, when silicon carbide and nanodiatomaceous earth were not added during the preparation of the silicon carbide liquid, and when water was used instead of sodium silicate solution. Only when the silicon carbide liquid of this invention is combined with β-cyclodextrin is the performance of the additives obtained with the most significant effect. The effect of other methods is not as significant as that of this invention.

[0181] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.

[0182] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An antifouling agent, characterized by, The scale inhibitor comprises the following raw materials by weight: acrylic acid-2-acrylamide-2-methylpropane sulfonic acid copolymer 30~35 parts, polyepoxysuccinic acid 6~10 parts, polyethylene oxide fatty alcohol ether 5~8 parts, sodium dodecyl benzene sulfonate 5~8 parts, nano zinc oxide 4~6 parts, metakaolin hybrid adjusted filler 6~9 parts, modified nano titanium dioxide agent 5~7 parts, silane coupling agent KH560 4~6 parts and deionized water 30~35 parts; The preparation method of the metakaolin hybrid adjusted filler is: S01: uniformly blend 3-5 parts of sodium stearate, 1-2 parts of silane coupling agent KH550 and 5-8 parts of a mass fraction of 8-12% sodium citrate solution to obtain a sodium stearate solution; S02: metakaolin is first heat treated at 135-145℃ for 1h, then cooled to 55℃ at a rate of 2-5℃ / min, and then heat treated, and then the heat treated metakaolin is uniformly stirred in the sodium stearate solution at 5-8 times the total amount of metakaolin to obtain sodium stearate treated metakaolin agent; S03: uniformly mix and ball mill the sodium stearate treated metakaolin agent and the hybrid adjusting agent at a weight ratio of (7-11):5, the ball milling speed is 1000-1500r / min, the ball milling time is 2h, after the ball milling is completed, the mixture is filtered and dried to obtain a metakaolin hybrid adjusting solution; S04: continue ball milling the metakaolin hybrid adjusting solution and the filler at a mass ratio of (5-8):3, the ball milling speed is 1250-1350r / min, the ball milling time is 2h, after the ball milling is completed, the mixture is filtered and dried to obtain the metakaolin hybrid adjusted filler; the preparation method of the hybrid adjusting agent is: uniformly blend 3-5 parts of carbon nanotubes, 2-3 parts of nano silicon dioxide, 2-4 parts of hollow glass microspheres and 5-8 parts of a chitosan solution to obtain a nano silicon dioxide solution; uniformly stir the aluminum borate whisker and the nano silicon dioxide solution at a weight ratio of 3:(5-7), after the stirring is completed, the mixture is filtered and dried to obtain the hybrid adjusting agent; The preparation method of the filler is: uniformly blend 3-5 parts of nano lanthanum oxide, 2-3 parts of boron nitride nanosheet and 5-8 parts of illite, sinter at a sintering temperature of 520-540℃ for 1h, after the sintering is completed, the filler is obtained.

2. The scale inhibitor of claim 1, wherein, The scale inhibitor comprises the following raw materials by weight: acrylic acid-2-acrylamide-2-methylpropane sulfonic acid copolymer 30~35 parts, polyepoxysuccinic acid 6~10 parts, polyethylene oxide fatty alcohol ether 5~8 parts, sodium dodecyl benzene sulfonate 5~8 parts, nano zinc oxide 4~6 parts, metakaolin hybrid adjusted filler 6~9 parts, modified nano titanium dioxide agent 5~7 parts, silane coupling agent KH560 4~6 parts and deionized water 30~35 parts; 3. The scale inhibitor of claim 2, wherein, The mass fraction of the chitosan solution is 3-6%, the stirring speed of the stirring treatment is 350-450r / min, the stirring time is 1h, and the stirring temperature is 50-55℃.

4. The scale inhibitor of claim 1, wherein The preparation method of the modified nano titanium dioxide agent is: S01: uniformly blend silane coupling agent KH560, ethanol and water, and acetic acid at a weight ratio of (3-5):(7-9):2:(0.1-0.2) to prepare a silane solution; Nano titanium dioxide, silane liquid according to the weight ratio 5: (8-9) ultrasonic treatment, ultrasonic power is 350-400W, ultrasonic 1h, ultrasonic end, get silane treated nano titanium dioxide liquid; S02: silane treated nano titanium dioxide liquid, additive according to the weight ratio (7-11): 5 ball milling, ball milling speed 1000-1500rmin, ball milling 2h, ball milling end, suction filtration, drying, get modified nano titanium dioxide agent; The additive is prepared by the following method: S02a: 2-3 parts of silicon carbide, 1-2 parts of nano diatomite and 5-8 parts of sodium silicate solution are uniformly blended to obtain a silicon carbide liquid; S02b: 2-5 parts of β-cyclodextrin, 6-9 parts of sodium lignosulfonate solution and 2-3 parts of nano cellulose are uniformly blended to obtain a β-cyclodextrin agent; the β-cyclodextrin agent and the silicon carbide liquid are fully stirred according to a weight ratio of 3:5, and then suction filtration and drying are performed to obtain the additive.

5. The scale inhibitor of claim 4, wherein the scale inhibitor is a polymeric scale inhibitor. The mass fraction of the sodium silicate solution is 5-8%; the mass fraction of the sodium lignosulfonate solution is 5-10%.

6. A method for preparing a scale inhibitor according to any one of claims 1 to 5, characterized in that, The method comprises the following steps: The raw materials are weighed according to the weight parts, stirred and uniformly mixed, the stirring speed is 350-400r / min, stirring 1h, stirring end, get the scale inhibitor.

7. The use of the scale inhibitor according to any one of claims 1-5 in water scale inhibition.

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