CN117466448A - Green composite corrosion and scale inhibitor and preparation method thereof - Google Patents
Green composite corrosion and scale inhibitor and preparation method thereof Download PDFInfo
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- CN117466448A CN117466448A CN202311741983.XA CN202311741983A CN117466448A CN 117466448 A CN117466448 A CN 117466448A CN 202311741983 A CN202311741983 A CN 202311741983A CN 117466448 A CN117466448 A CN 117466448A
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- corrosion
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- acid
- scale
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- 238000005260 corrosion Methods 0.000 title claims abstract description 62
- 230000007797 corrosion Effects 0.000 title claims abstract description 62
- 239000002455 scale inhibitor Substances 0.000 title claims abstract description 41
- 239000011174 green composite Substances 0.000 title claims abstract description 16
- 238000002360 preparation method Methods 0.000 title description 5
- PIPQOFRJDBZPFR-UHFFFAOYSA-N 1h-benzimidazole-5,6-dicarboxylic acid Chemical compound C1=C(C(O)=O)C(C(=O)O)=CC2=C1NC=N2 PIPQOFRJDBZPFR-UHFFFAOYSA-N 0.000 claims abstract description 24
- QRUDEWIWKLJBPS-UHFFFAOYSA-N benzotriazole Chemical compound C1=CC=C2N[N][N]C2=C1 QRUDEWIWKLJBPS-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000012964 benzotriazole Substances 0.000 claims abstract description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000003112 inhibitor Substances 0.000 claims abstract description 10
- 239000002270 dispersing agent Substances 0.000 claims abstract description 5
- 239000002994 raw material Substances 0.000 claims abstract description 5
- 229920000805 Polyaspartic acid Polymers 0.000 claims description 14
- 229920000141 poly(maleic anhydride) Polymers 0.000 claims description 14
- 108010064470 polyaspartate Proteins 0.000 claims description 14
- 229920001529 polyepoxysuccinic acid Polymers 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 7
- 229920001577 copolymer Polymers 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 6
- 229920002126 Acrylic acid copolymer Polymers 0.000 claims description 5
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 5
- JPZROSNLRWHSQQ-UHFFFAOYSA-N furan-2,5-dione;prop-2-enoic acid Chemical compound OC(=O)C=C.O=C1OC(=O)C=C1 JPZROSNLRWHSQQ-UHFFFAOYSA-N 0.000 claims description 5
- ATMLPEJAVWINOF-UHFFFAOYSA-N acrylic acid acrylic acid Chemical compound OC(=O)C=C.OC(=O)C=C ATMLPEJAVWINOF-UHFFFAOYSA-N 0.000 claims 1
- 230000005764 inhibitory process Effects 0.000 abstract description 26
- 230000000052 comparative effect Effects 0.000 description 10
- 239000002131 composite material Substances 0.000 description 7
- 239000000498 cooling water Substances 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 3
- 239000008235 industrial water Substances 0.000 description 3
- 239000011574 phosphorus Substances 0.000 description 3
- 229910052698 phosphorus Inorganic materials 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000002401 inhibitory effect Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- OXIKLRTYAYRAOE-CMDGGOBGSA-N (e)-3-(1-benzyl-3-pyridin-3-ylpyrazol-4-yl)prop-2-enoic acid Chemical group N1=C(C=2C=NC=CC=2)C(/C=C/C(=O)O)=CN1CC1=CC=CC=C1 OXIKLRTYAYRAOE-CMDGGOBGSA-N 0.000 description 1
- ZMYKITJYWFYRFJ-UHFFFAOYSA-N 4-oxo-4-(2-phenylethylamino)butanoic acid Chemical compound OC(=O)CCC(=O)NCCC1=CC=CC=C1 ZMYKITJYWFYRFJ-UHFFFAOYSA-N 0.000 description 1
- OPGUZRRLMQSMAQ-UHFFFAOYSA-N 5-(4-methoxyphenyl)-1-phenylbenzimidazole Chemical group C1=CC(OC)=CC=C1C1=CC=C(N(C=N2)C=3C=CC=CC=3)C2=C1 OPGUZRRLMQSMAQ-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- CIPMQPTWGWCBLF-UHFFFAOYSA-N chembl382387 Chemical group C=1C(CC(=O)O)=CC(C=2NC3=CC=CC=C3N=2)=C(O)C=1C1=CC=CC([N+]([O-])=O)=C1 CIPMQPTWGWCBLF-UHFFFAOYSA-N 0.000 description 1
- 238000010668 complexation reaction Methods 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000012851 eutrophication Methods 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- SEOVTRFCIGRIMH-UHFFFAOYSA-N indole-3-acetic acid Chemical group C1=CC=C2C(CC(=O)O)=CNC2=C1 SEOVTRFCIGRIMH-UHFFFAOYSA-N 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000000126 substance Substances 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
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- 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)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention relates to the technical field of water treatment, and provides a green composite corrosion and scale inhibitor, which comprises the following raw materials in parts by weight: 90-130 parts of scale inhibitor, 6-10 parts of corrosion inhibitor, 6-8 parts of dispersing agent and 10-15 parts of water; the corrosion inhibitor consists of benzimidazole-5, 6-dicarboxylic acid and benzotriazole. By the technical scheme, the problems of poor scale inhibition and low corrosion inhibition rate of the corrosion and scale inhibitor in the prior art are solved.
Description
Technical Field
The invention relates to the technical field of water treatment, in particular to a green composite corrosion and scale inhibitor and a preparation method thereof.
Background
In the field of industrial production, in order to save water resources, industrial water needs to be treated, and after the industrial water meets the use standard of circulating cooling water, the treated industrial water is used as the circulating cooling water, so that the water utilization rate is improved. However, in the use process, the circulating cooling water is continuously evaporated and concentrated, and when a certain concentration multiple is reached, calcium scale and iron scale are generated, so that a cooling water pipeline is blocked, and meanwhile, the scales remain in the pipeline and further cause problems such as corrosion and the like. In order to prevent the above problems, it is generally required to add a scale inhibitor having scale inhibiting, dispersing and corrosion inhibiting properties to the circulating cooling water to inhibit the formation of calcium scale and iron scale and form a protective film on the inner wall of the pipeline, thereby reducing the corrosiveness of the scale. However, the corrosion and scale inhibitor used at present has poor scale inhibition and low corrosion inhibition rate, so that the ideal corrosion and scale inhibition effect is not achieved.
Disclosure of Invention
The invention provides a green composite corrosion and scale inhibitor and a preparation method thereof, which solve the problems of poor scale inhibition and low corrosion inhibition rate of the corrosion and scale inhibitor in the prior art.
The technical scheme of the invention is as follows:
the invention provides a green composite corrosion and scale inhibitor, which comprises the following raw materials in parts by weight: 90-130 parts of scale inhibitor, 6-10 parts of corrosion inhibitor, 6-8 parts of dispersing agent and 10-15 parts of water;
the corrosion inhibitor consists of benzimidazole-5, 6-dicarboxylic acid and benzotriazole.
As a further technical scheme, the mass ratio of the benzimidazole-5, 6-dicarboxylic acid to the benzotriazole is 1-3:1.
As a further technical scheme, the mass ratio of the benzimidazole-5, 6-dicarboxylic acid to the benzotriazole is 2:1.
As a further technical scheme, the scale inhibitor consists of polyepoxysuccinic acid, polymaleic anhydride and polyaspartic acid.
As a further technical scheme, the mass ratio of the polyepoxysuccinic acid, the polymaleic anhydride and the polyaspartic acid is 2-3: 1:1.
as a further technical scheme, the mass ratio of the polyepoxysuccinic acid, the polymaleic anhydride and the polyaspartic acid is 2.5:1:1.
as a further technical scheme, the dispersing agent comprises one or more of maleic anhydride-acrylic acid copolymer, acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer and acrylic acid-acrylic ester-sulfonate copolymer.
The invention also comprises a preparation method of the green composite corrosion and scale inhibitor, which comprises the following steps: and uniformly mixing the raw materials to obtain the green composite corrosion and scale inhibitor.
In order to further technical scheme, the rotating speed of mixing is 100-120 r/min, and the mixing time is 100-120 min.
The corrosion inhibitor consists of benzimidazole-5, 6-dicarboxylic acid and benzotriazole, and the scale inhibitor consists of polyepoxysuccinic acid, polymaleic anhydride and polyaspartic acid, does not contain inorganic phosphorus or organic phosphorus, can avoid bringing pollutant phosphorus into water, and reduces water eutrophication.
The working principle and the beneficial effects of the invention are as follows:
1. in the invention, benzimidazole-5, 6-dicarboxylic acid and benzotriazole are added to compound as corrosion inhibitor in corrosion and scale inhibitor, wherein the benzimidazole-5, 6-dicarboxylic acid has a plurality of active sites capable of reacting with the metal surface, a firmer protective film can be formed, so that the corrosion inhibition performance is further improved, and meanwhile, the benzimidazole-5, 6-dicarboxylic acid contains carboxyl functional groups capable of carrying out complexation reaction with hardness salt in water, so that the scale inhibition performance of the corrosion and scale inhibitor can be further improved, and the benzotriazole is a common corrosion inhibitor, and the corrosion inhibition performance of the corrosion and scale inhibitor can be further improved by compounding the benzimidazole-5, 6-dicarboxylic acid and the benzotriazole.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the following examples and comparative examples,
the model of the polyepoxysuccinic acid is PESA, and the manufacturer is Guangzhou Yuan Chang trade Co., ltd;
polymaleic anhydride is manufactured by Shandong Denno New Material technology Co., ltd;
the model of polyaspartic acid is HS-1046, and the manufacturer is Shandong Hao chemical Co., ltd;
the model of the maleic anhydride-acrylic acid copolymer is industrial grade, and the manufacturer is Jiangsu chemical industry Co., ltd;
the acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer has a product number of 00084 and is manufactured by Hubei Jiujingku Feng Longhua company, inc.
Example 1
50 parts of polyepoxysuccinic acid, 20 parts of polymaleic anhydride, 20 parts of polyaspartic acid, 4.5 parts of benzimidazole-5, 6-dicarboxylic acid, 1.5 parts of benzotriazole, 6 parts of maleic anhydride-acrylic acid copolymer and 10 parts of water are stirred for 120min at a stirring speed of 100r/min, and then the composite corrosion and scale inhibitor is obtained.
Example 2
60 parts of polyepoxysuccinic acid, 25 parts of polymaleic anhydride, 23 parts of polyaspartic acid, 6 parts of benzimidazole-5, 6-dicarboxylic acid, 2 parts of benzotriazole, 7 parts of acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer and 14 parts of water are stirred for 110 minutes at a stirring speed of 110r/min, and then the composite corrosion and scale inhibitor is obtained.
Example 3
75 parts of polyepoxysuccinic acid, 30 parts of polymaleic anhydride, 25 parts of polyaspartic acid, 7.5 parts of benzimidazole-5, 6-dicarboxylic acid, 2.5 parts of benzotriazole, 8 parts of maleic anhydride-acrylic acid copolymer and 15 parts of water are stirred for 100 minutes at a stirring speed of 120r/min, and then the composite corrosion and scale inhibitor is obtained.
Example 4
This example differs from example 1 only in that 45 parts of polyepoxysuccinic acid, 22.5 parts of polymaleic anhydride and 22.5 parts of polyaspartic acid are added.
Example 5
This example differs from example 1 only in that 54 parts of polyepoxysuccinic acid, 18 parts of polymaleic anhydride and 18 parts of polyaspartic acid are added.
Example 6
This example differs from example 1 only in that 4 parts of benzimidazole-5, 6-dicarboxylic acid and 2 parts of benzotriazole are added.
Example 7
This example differs from example 1 only in that 3 parts of benzimidazole-5, 6-dicarboxylic acid and 3 parts of benzotriazole are added.
Example 8
This example differs from example 1 only in that 2 parts of benzimidazole-5, 6-dicarboxylic acid and 4 parts of benzotriazole are added.
Example 9
This example differs from example 1 only in that 4.8 parts of benzimidazole-5, 6-dicarboxylic acid and 1.2 parts of benzotriazole are added.
Comparative example 1
This comparative example differs from example 1 only in that no benzimidazole-5, 6-dicarboxylic acid was added.
Comparative example 2
This comparative example differs from example 1 only in that benzotriazole was not added.
Performance test:
the composite corrosion and scale inhibitor obtained in the examples 1-9 and the comparative examples 1-2 is used for measuring the scale inhibition performance according to the method in GB/T16632-2019 method for measuring the scale inhibition performance of a water treatment agent by calcium carbonate deposition, the experimental water temperature is 80 ℃, and the experimental dosage of the composite corrosion and scale inhibitor is 30mg/L; the corrosion inhibition performance is measured according to the method in GB/T18175-2014 method for measuring corrosion inhibition performance of water treatment agent by rotary hanging plate, the experimental water temperature is 80 ℃, the rotating speed is 75r/min, the running time is 72 hours, the experimental dosage of the composite corrosion and scale inhibitor is 30mg/L, the test results are shown in Table 1,
table 1 test results of the Performance of the composite corrosion and scale inhibitor in examples 1 to 9 and comparative examples 1 to 2
In the invention, compared with the example 1, the comparative example 1 is free from adding benzimidazole-5, 6-dicarboxylic acid and the comparative example 2 is free from adding benzotriazole, and as a result, the scale inhibition performance of the comparative examples 1-2 is lower than that of the example 1, and the corrosion rate is higher than that of the example 1, so that the combination of benzimidazole-5, 6-dicarboxylic acid and benzotriazole as the corrosion inhibitor of the corrosion and scale inhibitor can improve the scale inhibition performance and corrosion inhibition performance of the corrosion and scale inhibitor.
Compared with the example 1, the mass ratio of the polyepoxysuccinic acid, the polymaleic anhydride and the polyaspartic acid is changed in the examples 4-5, and as a result, the scale inhibition performance of the example 1 is superior to the examples 4-5, the corrosion rate is lower than the examples 4-5, which indicates that the scale inhibition performance and the corrosion inhibition performance of the corrosion and scale inhibitor can be further improved when the mass ratio of the polyepoxysuccinic acid, the polymaleic anhydride and the polyaspartic acid is 2.5:1:1.
Compared with the example 1, the mass ratio of the benzimidazole-5, 6-dicarboxylic acid to the benzotriazole is changed in the examples 6-9, and as a result, the scale inhibition performance of the examples 1 and 6-7 is superior to that of the examples 8-9, the corrosion rate is lower than that of the examples 8-9, so that the scale inhibition performance and the corrosion inhibition performance of the corrosion and scale inhibitor can be further improved when the mass ratio of the benzimidazole-5, 6-dicarboxylic acid to the benzotriazole is 1-3:1, the scale inhibition performance of the example 6 is higher than that of the examples 1 and 7, and the corrosion rate is lower than that of the examples 1 and 7, so that the scale inhibition performance and the corrosion inhibition performance of the corrosion and scale inhibitor can be further improved when the mass ratio of the benzimidazole-5, 6-dicarboxylic acid to the benzotriazole is 2:1.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (7)
1. The green composite corrosion and scale inhibitor is characterized by comprising the following raw materials in parts by weight: 90-130 parts of scale inhibitor, 6-10 parts of corrosion inhibitor, 6-8 parts of dispersing agent and 10-15 parts of water;
the corrosion inhibitor consists of benzimidazole-5, 6-dicarboxylic acid and benzotriazole.
2. The green composite corrosion and scale inhibitor according to claim 1, wherein the mass ratio of the benzimidazole-5, 6-dicarboxylic acid to the benzotriazole is 1-3:1.
3. The green composite corrosion and scale inhibitor according to claim 1, wherein the scale inhibitor is composed of polyepoxysuccinic acid, polymaleic anhydride and polyaspartic acid.
4. The green composite corrosion and scale inhibitor according to claim 1, wherein the mass ratio of polyepoxysuccinic acid, polymaleic anhydride and polyaspartic acid is 2-3: 1:1.
5. the green composite corrosion and scale inhibitor according to claim 1, wherein the dispersant comprises one or more of maleic anhydride-acrylic acid copolymer, acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer, acrylic acid-acrylic acid ester-sulfonate copolymer.
6. The method for preparing the green composite corrosion and scale inhibitor according to any one of claims 1 to 5, which is characterized by comprising the following steps: and uniformly mixing the raw materials to obtain the green composite corrosion and scale inhibitor.
7. The method for preparing the green composite corrosion and scale inhibitor according to claim 6, wherein the mixing speed is 100-120 r/min, and the mixing time is 100-120 min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311741983.XA CN117466448A (en) | 2023-12-18 | 2023-12-18 | Green composite corrosion and scale inhibitor and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311741983.XA CN117466448A (en) | 2023-12-18 | 2023-12-18 | Green composite corrosion and scale inhibitor and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
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| CN117466448A true CN117466448A (en) | 2024-01-30 |
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| CN202311741983.XA Pending CN117466448A (en) | 2023-12-18 | 2023-12-18 | Green composite corrosion and scale inhibitor and preparation method thereof |
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| Country | Link |
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