CN113912195A - Non-phosphorus scale inhibitor for inhibiting silicon scale and preparation method thereof - Google Patents
Non-phosphorus scale inhibitor for inhibiting silicon scale and preparation method thereof Download PDFInfo
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- CN113912195A CN113912195A CN202111326006.4A CN202111326006A CN113912195A CN 113912195 A CN113912195 A CN 113912195A CN 202111326006 A CN202111326006 A CN 202111326006A CN 113912195 A CN113912195 A CN 113912195A
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- 239000002455 scale inhibitor Substances 0.000 title claims abstract description 42
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 title claims abstract description 31
- 230000002401 inhibitory effect Effects 0.000 title claims abstract description 31
- 229910052710 silicon Inorganic materials 0.000 title claims abstract description 31
- 239000010703 silicon Substances 0.000 title claims abstract description 31
- 238000002360 preparation method Methods 0.000 title abstract description 21
- 239000011574 phosphorus Substances 0.000 title abstract description 11
- 229910052698 phosphorus Inorganic materials 0.000 title abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 39
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims abstract description 28
- 229920001897 terpolymer Polymers 0.000 claims abstract description 27
- 229920000805 Polyaspartic acid Polymers 0.000 claims abstract description 24
- 108010064470 polyaspartate Proteins 0.000 claims abstract description 24
- 229920001577 copolymer Polymers 0.000 claims abstract description 23
- 229920001529 polyepoxysuccinic acid Polymers 0.000 claims abstract description 22
- 239000008367 deionised water Substances 0.000 claims abstract description 21
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 21
- 229920000058 polyacrylate Polymers 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 14
- 238000003756 stirring Methods 0.000 claims description 12
- 238000001914 filtration Methods 0.000 claims description 9
- 238000004806 packaging method and process Methods 0.000 claims description 8
- 238000005303 weighing Methods 0.000 claims description 8
- DZSVIVLGBJKQAP-UHFFFAOYSA-N 1-(2-methyl-5-propan-2-ylcyclohex-2-en-1-yl)propan-1-one Chemical compound CCC(=O)C1CC(C(C)C)CC=C1C DZSVIVLGBJKQAP-UHFFFAOYSA-N 0.000 claims description 6
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims description 6
- XFHJDMUEHUHAJW-UHFFFAOYSA-N n-tert-butylprop-2-enamide Chemical compound CC(C)(C)NC(=O)C=C XFHJDMUEHUHAJW-UHFFFAOYSA-N 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 4
- 239000000178 monomer Substances 0.000 claims description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical group O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract description 32
- 230000005764 inhibitory process Effects 0.000 abstract description 20
- 239000000377 silicon dioxide Substances 0.000 abstract description 16
- 230000000694 effects Effects 0.000 abstract description 11
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 abstract description 8
- 239000006185 dispersion Substances 0.000 abstract description 6
- 230000008021 deposition Effects 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 239000000463 material Substances 0.000 abstract description 4
- 231100000956 nontoxicity Toxicity 0.000 abstract description 4
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 230000004048 modification Effects 0.000 abstract description 3
- 238000012986 modification Methods 0.000 abstract description 3
- 238000003912 environmental pollution Methods 0.000 abstract description 2
- 229910001868 water Inorganic materials 0.000 description 18
- 230000007797 corrosion Effects 0.000 description 14
- 238000005260 corrosion Methods 0.000 description 14
- -1 phosphine compound Chemical class 0.000 description 14
- 230000000052 comparative effect Effects 0.000 description 6
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 4
- 235000012239 silicon dioxide Nutrition 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 239000000498 cooling water Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 2
- 229910000019 calcium carbonate Inorganic materials 0.000 description 2
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 241000233866 Fungi Species 0.000 description 1
- 241000237858 Gastropoda Species 0.000 description 1
- 241000237852 Mollusca Species 0.000 description 1
- XYFCBTPGUUZFHI-UHFFFAOYSA-N Phosphine Natural products P XYFCBTPGUUZFHI-UHFFFAOYSA-N 0.000 description 1
- 239000004115 Sodium Silicate Substances 0.000 description 1
- 229920002125 Sokalan® Polymers 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 150000001413 amino acids Chemical class 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000001506 calcium phosphate Substances 0.000 description 1
- 229910000389 calcium phosphate Inorganic materials 0.000 description 1
- 235000011010 calcium phosphates Nutrition 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000007334 copolymerization reaction Methods 0.000 description 1
- 239000007857 degradation product Substances 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- VUZPPFZMUPKLLV-UHFFFAOYSA-N methane;hydrate Chemical compound C.O VUZPPFZMUPKLLV-UHFFFAOYSA-N 0.000 description 1
- 238000001471 micro-filtration Methods 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- GALOTNBSUVEISR-UHFFFAOYSA-N molybdenum;silicon Chemical compound [Mo]#[Si] GALOTNBSUVEISR-UHFFFAOYSA-N 0.000 description 1
- 239000008239 natural water Substances 0.000 description 1
- UEZVMMHDMIWARA-UHFFFAOYSA-M phosphonate Chemical compound [O-]P(=O)=O UEZVMMHDMIWARA-UHFFFAOYSA-M 0.000 description 1
- 229910000073 phosphorus hydride Inorganic materials 0.000 description 1
- 229920001308 poly(aminoacid) Polymers 0.000 description 1
- 229920000141 poly(maleic anhydride) Polymers 0.000 description 1
- 239000004584 polyacrylic acid Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000001223 reverse osmosis Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 150000004760 silicates Chemical class 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 229910052911 sodium silicate Inorganic materials 0.000 description 1
- 238000011895 specific detection Methods 0.000 description 1
- 238000002798 spectrophotometry method Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- QORWJWZARLRLPR-UHFFFAOYSA-H tricalcium bis(phosphate) Chemical compound [Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O QORWJWZARLRLPR-UHFFFAOYSA-H 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- 150000003751 zinc Chemical class 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
- C02F5/08—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents
- C02F5/10—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances
- C02F5/12—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 nitrogen
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
Abstract
The invention discloses a non-phosphorus scale inhibitor for inhibiting silicon scale and a preparation method thereof, wherein the non-phosphorus scale inhibitor comprises the following components in parts by weight: 15-25 parts of polyaspartic acid, 20-30 parts of terpolymer, 15-25 parts of polyepoxysuccinic acid, 10-20 parts of acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer and 0-25 parts of deionized water. The preparation method has simple steps and convenient and fast operation, the phosphorus-free scale inhibitor can effectively improve the dispersion effect, has high safety and environmental protection, low production cost, no toxicity and good scale inhibition effect, can prevent the deposition of silica scale, is suitable for being applied to high-silicon water, can produce high-silicon water scale inhibitor materials with excellent performance through simple modification steps, has easily degraded main organic components, can not cause environmental pollution, and greatly reduces the subsequent treatment cost.
Description
Technical Field
The invention relates to the technical field of circulating water scale inhibitors, in particular to a non-phosphorus scale inhibitor for inhibiting silicon scale and a preparation method thereof.
Background
On the one hand, in nature, the silicon element tends to exist in the form of silica and silicates. The soluble silicon dioxide in natural water is mainly derived from weathering of ores and rocks, the content of the silicon dioxide is usually less than 40mg/L, but in some areas, the content of the silicon dioxide is as high as 40-180 mg/L. On the other hand, the general inorganic scale inhibitor cannot inhibit the formation of silica scale in the industrial circulating water system, and once the silica scale is formed, it is difficult to remove it by chemical cleaning.
When water having a high silica content is used, the circulating water system must be operated at a low efficiency in order to ensure that the solubility of silica is not exceeded, so that the concentration factor of the circulating water system is greatly limited, thereby greatly increasing the water consumption and increasing the production cost. In the running process of the circulating water system, a proper amount of silica scale inhibitor is used, so that the deposition of silica scale can be prevented. The invention mainly aims at a circulating water system taking high-silicon water as raw water.
Disclosure of Invention
Aiming at the problems in the related art, the invention provides a non-phosphorus scale inhibitor for inhibiting silicon scale and a preparation method thereof, aiming at overcoming the technical problems in the prior related art, and aiming at improving the dispersion effect, through the reasonable collocation of raw materials and the interaction in the use process, the invention has the advantages of high safety, high environmental protection, low production cost, no toxicity, low water consumption, good scale inhibition effect, capability of preventing the deposition of the silicon scale, and suitability for being applied to high-silicon water.
In order to achieve the purpose, the invention provides the following technical scheme:
a phosphorus-free scale inhibitor for inhibiting silicon scale comprises the following components in parts by weight: 15-25 parts of polyaspartic acid, 20-30 parts of terpolymer, 15-25 parts of polyepoxysuccinic acid, 10-20 parts of acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer and 0-25 parts of deionized water.
By adopting the technical scheme, the method at least has the following advantages: 1. polyaspartic acid is an amino acid polymer, naturally occurring in shells of snails and mollusks, and is an environmentally friendly chemical with good biodegradability. Polyaspartic acid belongs to the class of polyamino acids. The peptide bond on the structural main chain of the polyaspartic acid is easy to be broken by the action of microorganisms, fungi and the like, and the final degradation products are ammonia, carbon dioxide and water which are harmless to the environment. As a water treatment agent, it has the main functions of scale inhibition and/or dispersion and corrosion inhibition. The scale inhibitor is particularly suitable for inhibiting the formation of calcium carbonate scale, calcium sulfate scale, barium sulfate scale and calcium phosphate scale in cooling water, boiler water and reverse osmosis treatment. The scale inhibition rate of calcium carbonate can reach 100%. The polyaspartic acid has a dispersing effect and can effectively prevent the corrosion of metal equipment. The polyaspartic acid and the organic phosphorus corrosion and scale inhibitor have synergistic effect, and are often compounded with vinyl polymer dispersants (such as polyacrylic acid, hydrolyzed polymaleic anhydride, acrylic acid-ethyl acrylate-itaconic acid copolymer and the like), phosphine compound corrosion and scale inhibitors and the like to form the efficient and multifunctional corrosion and scale inhibitor. 2. The polyepoxysuccinic acid is a nitrogen-free and non-phosphorus organic compound, has double effects of scale inhibition and corrosion inhibition, has good biodegradability, is suitable for a high-alkali and high-metal content water system, and is a green water treatment chemical. With the increase of the concentration of the polyepoxysuccinic acid, the corrosion inhibition effect is enhanced, the corrosion rate of the carbon steel is gradually reduced, and the corrosion inhibition rate is increased. And if a better corrosion inhibition effect is achieved, the required mass concentration of the polyepoxysuccinic acid is higher. 3. The acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer is mainly used for scale inhibition and dispersion of circulating water treatment of open industrial circulating cooling water systems, oilfield sewage reinjection systems and metallurgical systems, cooling water leached by steel works prevents Fe2O3 from being pasted and deposited, and the acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer can be compounded with organic phosphonate and zinc salt for use, and is suitable for the pH condition of 7.0-9.5.
Preferably, the terpolymer is a modified terpolymer of acrylic acid/2-acrylamide-2-methylpropanesulfonic acid/N-tert-butyl acrylamide synthesized by taking acrylic acid, 2-acrylamide-2-methylpropanesulfonic acid and N-tert-butyl acrylamide as monomers; acrylic acid-sodium methallyl sulfonate-ethyl acrylate terpolymer; any one or a mixture of any two or more of the adipic acid-amino terminated polyether-diethylenetriamine terpolymer in any proportion.
Preferably, the composition comprises the following components in parts by weight: 20 parts of polyaspartic acid, 20 parts of terpolymer, 25 parts of polyepoxysuccinic acid, 20 parts of acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer and 15 parts of deionized water.
In order to achieve the purpose, the invention provides the following technical scheme:
the preparation method of the silicon scale inhibiting phosphorus-free scale inhibitor comprises the following steps:
the method comprises the following steps: weighing polyaspartic acid, terpolymer, polyepoxysuccinic acid, acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer and deionized water according to the weight ratio;
step two: sequentially putting polyaspartic acid, terpolymer, polyepoxysuccinic acid and acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer into a reactor, and stirring uniformly in advance;
step three: adding deionized water into the reactor, and stirring for 20-40min at room temperature;
step four: filtering and packaging to obtain the silicon scale-inhibiting phosphorus-free scale inhibitor.
Preferably, the stirring speed in the third step is 800-.
Compared with the prior art, the invention has the beneficial effects that:
the invention relates to a non-phosphorus scale inhibitor for inhibiting silicon scale and a preparation method thereof, the preparation method has simple steps and convenient operation, the non-phosphorus scale inhibitor can effectively improve the dispersion effect, has high safety and environmental protection through reasonable collocation of raw materials and interaction in the using process, has low production cost, no toxicity, low water consumption and good scale inhibition effect, can prevent the deposition of the silicon scale, is suitable for being applied to high-silicon water, can produce the high-silicon water scale inhibitor material with excellent performance through simple modification steps, and has no toxicity, no phosphorus, easy degradation of main organic components and no environmental pollution compared with the prior art, thereby greatly reducing the subsequent treatment cost.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
A preparation method of a phosphorus-free scale inhibitor for inhibiting silicon scale comprises the following steps:
the method comprises the following steps: accurately weighing 15g of polyaspartic acid, 10g of acrylic acid-sodium methylacrylsulfonate-ethyl acrylate terpolymer, 10g of adipic acid-amino terminated polyether-diethylenetriamine terpolymer, 25g of polyepoxysuccinic acid, 20g of acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer and 20g of deionized water;
step two: sequentially adding 15g of polyaspartic acid, 10g of acrylic acid-sodium methylacrylsulfonate-ethyl acrylate terpolymer, 10g of adipic acid-amino terminated polyether-diethylenetriamine terpolymer, 25g of polyepoxysuccinic acid, 20g of acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer and 20g of deionized water into a reactor;
step three: stirring at room temperature for 40 min;
step four: filtering and packaging to obtain the silicon scale inhibiting phosphorus-free scale inhibitor.
Example 2
A preparation method of a phosphorus-free scale inhibitor for inhibiting silicon scale comprises the following steps:
the method comprises the following steps: accurately weighing 25g of polyaspartic acid, 15g of acrylic acid-sodium methylacrylsulfonate-ethyl acrylate terpolymer, 15g of adipic acid-amino terminated polyether-diethylenetriamine terpolymer, 15g of polyepoxysuccinic acid, 20g of acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer and 10g of deionized water;
step two: adding 25g of polyaspartic acid, 15g of acrylic acid-sodium methylacrylsulfonate-ethyl acrylate terpolymer, 15g of adipic acid-amino terminated polyether-diethylenetriamine terpolymer, 15g of polyepoxysuccinic acid, 20g of acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer and 10g of deionized water into a reactor in sequence;
step three: stirring at room temperature for 40 min;
step four: filtering and packaging to obtain the silicon scale inhibiting phosphorus-free scale inhibitor.
Example 3
A preparation method of a phosphorus-free scale inhibitor for inhibiting silicon scale comprises the following steps:
the method comprises the following steps: accurately weighing 20g of polyaspartic acid, 20g of acrylic acid-sodium methylacrylsulfonate-ethyl acrylate terpolymer, 15g of polyepoxysuccinic acid, 20g of acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer and 25g of deionized water;
step two: sequentially adding 20g of polyaspartic acid, 20g of acrylic acid-sodium methylacrylsulfonate-ethyl acrylate terpolymer, 15g of polyepoxysuccinic acid, 20g of acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer and 25g of deionized water into a reactor;
step three: stirring at room temperature for 40 min;
step four: filtering and packaging to obtain the silicon scale inhibiting phosphorus-free scale inhibitor.
Comparative example 1
A preparation method of a phosphorus-free scale inhibitor for inhibiting silicon scale comprises the following steps:
the method comprises the following steps: accurately weighing 10g of acrylic acid-sodium methylacrylsulfonate-ethyl acrylate terpolymer, 10g of adipic acid-amino terminated polyether-diethylenetriamine terpolymer, 25g of polyepoxysuccinic acid and 20g of deionized water;
step two: sequentially adding 10g of acrylic acid-sodium methylacrylsulfonate-ethyl acrylate terpolymer, 10g of adipic acid-amino terminated polyether-diethylenetriamine terpolymer, 25g of polyepoxysuccinic acid and 20g of deionized water into a reactor;
step three: stirring at room temperature for 40 min;
step four: filtering and packaging to obtain the silicon scale inhibiting phosphorus-free scale inhibitor.
The preparation method of the phosphorus-free scale inhibitor for inhibiting silica scale is the same as that of the preparation method of the example 1, except that no polyaspartic acid and acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer are added.
Comparative example 2
A preparation method of a phosphorus-free scale inhibitor for inhibiting silicon scale comprises the following steps:
the method comprises the following steps: accurately weighing 10g of acrylic acid-sodium methylacrylsulfonate-ethyl acrylate terpolymer, 10g of adipic acid-amino terminated polyether-diethylenetriamine terpolymer, 20g of acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer and 20g of deionized water;
step two: sequentially adding 10g of acrylic acid-sodium methylacrylsulfonate-ethyl acrylate terpolymer, 10g of adipic acid-amino terminated polyether-diethylenetriamine terpolymer, 20g of acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer and 20g of deionized water into a reactor;
step three: stirring at room temperature for 40 min;
step four: filtering and packaging to obtain the silicon scale inhibiting phosphorus-free scale inhibitor.
The preparation method of the phosphorus-free scale inhibitor for inhibiting silica scale is the same as that of the preparation method of the embodiment 1, except that polyaspartic acid and polyepoxysuccinic acid are not added.
Comparative example 3
A preparation method of a phosphorus-free scale inhibitor for inhibiting silicon scale comprises the following steps:
the method comprises the following steps: accurately weighing 15g of polyaspartic acid, 10g of acrylic acid-sodium methylacrylsulfonate-ethyl acrylate terpolymer, 20g of acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer and 20g of deionized water;
step two: sequentially adding 15g of polyaspartic acid, 10g of acrylic acid-sodium methylacrylsulfonate-ethyl acrylate terpolymer, 20g of acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer and 20g of deionized water into a reactor;
step three: stirring at room temperature for 40 min;
step four: filtering and packaging to obtain the silicon scale inhibiting phosphorus-free scale inhibitor.
The preparation method of the phosphorus-free scale inhibitor for inhibiting silicon scale is the same as that of the preparation method of the embodiment 1, except that no adipic acid-amino terminated polyether-diethylenetriamine terpolymer and no polyepoxysuccinic acid are added.
Detection method/test method
Testing the scale inhibition performance of the silica scale: six 500mg/L (calculated by silicon dioxide) sodium silicate solutions are prepared, and 40mg/L of the silicon scale-inhibiting phosphorus-free scale inhibitor prepared in the examples 1-3 and the comparative examples 1-3 is added respectively. Then adjusting the pH value of the solution to 7.0 +/-0.1 by using hydrochloric acid and sodium hydroxide, placing a container containing the solution in a water bath kettle at 40 ℃ for constant temperature for 20 hours, filtering by using a 0.45 mu m microfiltration membrane, measuring the content of soluble silica in the solution by using a silicon molybdenum blue spectrophotometry, and calculating the scale inhibition rate as shown in table 1.
TABLE 1
Comparing comparative examples 1-3 with examples 1-3, it can be seen that the scale inhibition performance is much reduced, which illustrates that the modified terpolymer acrylic acid/2-acrylamide-2-methylpropanesulfonic acid/N-tert-butyl acrylamide is synthesized by using the terpolymer as monomers, and using acrylic acid, 2-acrylamide-2-methylpropanesulfonic acid and N-tert-butyl acrylamide as monomers; acrylic acid-sodium methallyl sulfonate-ethyl acrylate terpolymer; any one or a mixture of more than two of the adipic acid-amino terminated polyether-diethylenetriamine terpolymer in any proportion reduces the formation of salt scale because the copolymerization material has an excellent dispersion system in high-silicon water, and the finished product of the invention has better scale inhibition effect, so that the proposal that the finished product can form good scale inhibition performance in high-silicon water can be implemented.
Detection method/test method
Corrosion inhibition performance: testing by adopting a GB/T8175-2000 standard;
the specific detection results are shown in the following table 2:
TABLE 2
Comparing comparative examples 1 to 3 with examples 1 to 3, it can be seen that the corrosion inhibition performance is much reduced, so that the corrosion inhibition performance is much reduced in high-silicon water, the generation of scale is inhibited, and the corrosion of the material surface is reduced.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. A phosphorus-free scale inhibitor for inhibiting silicon scale is characterized by comprising the following components in parts by weight: 15-25 parts of polyaspartic acid, 20-30 parts of terpolymer, 15-25 parts of polyepoxysuccinic acid, 10-20 parts of acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer and 0-25 parts of deionized water.
2. The silicon scale inhibiting phosphorus-free scale inhibitor according to claim 1, wherein the terpolymer is a modified terpolymer of acrylic acid/2-acrylamide-2-methylpropanesulfonic acid/N-tert-butylacrylamide, which is synthesized by taking acrylic acid, 2-acrylamide-2-methylpropanesulfonic acid and N-tert-butylacrylamide as monomers; acrylic acid-sodium methallyl sulfonate-ethyl acrylate terpolymer; any one or a mixture of any two or more of the adipic acid-amino terminated polyether-diethylenetriamine terpolymer in any proportion.
3. The silicon scale inhibiting phosphorus-free scale inhibitor of claim 1, which is characterized by comprising the following components in parts by weight: 20 parts of polyaspartic acid, 20 parts of terpolymer, 25 parts of polyepoxysuccinic acid, 20 parts of acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer and 15 parts of deionized water.
4. A method for preparing the silicon scale inhibiting phosphorus-free scale inhibitor as defined in any one of claims 1 to 3, comprising the steps of:
the method comprises the following steps: weighing polyaspartic acid, terpolymer, polyepoxysuccinic acid, acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer and deionized water according to the weight ratio;
step two: sequentially putting polyaspartic acid, terpolymer, polyepoxysuccinic acid and acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer into a reactor, and stirring uniformly in advance;
step three: adding deionized water into the reactor, and stirring for 20-40min at room temperature;
step four: filtering and packaging to obtain the silicon scale-inhibiting phosphorus-free scale inhibitor.
5. The method as claimed in claim 3, wherein the stirring speed in step three is 800-1500 r/min.
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