CN107304076B - Corrosion-inhibition, scale-inhibition and sterilization composition and application thereof - Google Patents
Corrosion-inhibition, scale-inhibition and sterilization composition and application thereof Download PDFInfo
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- CN107304076B CN107304076B CN201610248157.5A CN201610248157A CN107304076B CN 107304076 B CN107304076 B CN 107304076B CN 201610248157 A CN201610248157 A CN 201610248157A CN 107304076 B CN107304076 B CN 107304076B
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
- C02F5/08—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents
- C02F5/10—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances
- C02F5/14—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances containing phosphorus
- C02F5/145—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances containing phosphorus combined with inorganic substances
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/50—Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
- C02F5/08—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents
- C02F5/083—Mineral agents
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/08—Corrosion inhibition
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Abstract
The invention relates to the field of water treatment, and discloses a corrosion-inhibition, scale-inhibition and sterilization composition and application thereof, wherein the composition contains water-soluble tin salt, organic phosphonic acid, a nitrogen-containing heterocyclic compound and a copolymer, the copolymer contains a structural unit provided by 2-acrylamido-2-methylpropanesulfonic acid, and the weight percentage of the structural unit provided by 2-acrylamido-2-methylpropanesulfonic acid is more than 20% based on the total amount of the copolymer, wherein the weight ratio of the water-soluble tin salt to the organic phosphonic acid to the nitrogen-containing heterocyclic compound to the copolymer is 1:1-20:1-12:1-20, and the weight of the water-soluble tin salt is calculated by tin ions. The corrosion-inhibition, scale-inhibition and sterilization composition has better corrosion inhibition, scale inhibition and sterilization performances, and the dosage is lower when the composition is used.
Description
Technical Field
The invention relates to the field of water treatment, in particular to a corrosion-inhibition, scale-inhibition and sterilization composition and application thereof in circulating cooling water treatment.
Background
The problems of corrosion, scaling and bacterial growth can be caused when the circulating cooling water is operated for a long time, and a corrosion inhibitor, a scale inhibitor and a bactericide are required to be added respectively. The research of nontoxic and high-efficiency multifunctional water treatment agents is the direction of medicament research and development. Most petrochemical enterprises apply the compound corrosion and scale inhibitor. The widely used formula includes phosphorus system (composed of polyphosphate, polycarboxylic acid and copolymer, zinc salt, etc.), and all organic system (composed of organic phosphonic acid, polycarboxylic acid and copolymer, azole compound with or without zinc salt). In the process of adding the water treatment agent, the compatibility problem of the scale and corrosion inhibitor and the bactericide is often existed. The common chlorine bactericide has oxidation effect on a plurality of scale and corrosion inhibitors, thereby reducing the corrosion and scale inhibition effect.
CN102578088A discloses a compound medicament with bactericidal, corrosion-inhibiting and scale-inhibiting effects, which comprises polyamides, quaternary ammonium salts, organic phosphonic acid polymers, inorganic salts and water. However, the dosage of the medicament is larger.
CN102730851A discloses a water treatment agent with corrosion and scale inhibition and biocidal efficacy and a preparation method thereof. The water treatment agent is a polyepoxysuccinic acid/Broboer copolymer which contains no phosphorus, is biodegradable and has a certain biocidal effect due to the existence of oxidizing bromine atoms. But the corrosion inhibition effect of the agent is general, and the sterilization effect is poor.
Therefore, the research and development of the water treatment agent with better corrosion inhibition, scale inhibition and sterilization performance and less dosage during use has important significance.
Disclosure of Invention
The invention aims to overcome the defect that the existing water treatment agent is difficult to have better corrosion inhibition, scale inhibition and sterilization performances at the same time, and provides a water treatment agent which has better corrosion inhibition, scale inhibition and sterilization performances and lower adding amount during use.
The inventor of the invention discovers in research that the water-soluble tin salt and the nitrogen-containing heterocyclic compound have obvious synergistic corrosion inhibition effect, the copolymer can play a role in stabilizing tin ions, in addition, tin hydroxide generated by hydrolysis of the water-soluble tin salt has a sterilization effect, and the tin hydroxide is compounded with organic phosphonic acid to obtain the medicament with the corrosion inhibition, scale inhibition and sterilization performances. Therefore, the composition for corrosion, scale and sterilization is used for treating circulating cooling water without adding a bactericide additionally or only adding a small amount of bactericide, and can achieve good corrosion, scale and sterilization effects.
Therefore, in order to achieve the above object, the present invention provides a corrosion-inhibiting, scale-inhibiting and sterilizing composition comprising a water-soluble tin salt, an organic phosphonic acid, a nitrogen-containing heterocyclic compound and a copolymer, wherein the copolymer comprises a structural unit provided by 2-acrylamido-2-methylpropanesulfonic acid, and the weight percentage of the structural unit provided by 2-acrylamido-2-methylpropanesulfonic acid is 20% or more based on the total amount of the copolymer, wherein the weight ratio of the water-soluble tin salt, the organic phosphonic acid, the nitrogen-containing heterocyclic compound and the copolymer is 1:1-20:1-12:1-20, and the weight of the water-soluble tin salt is calculated by tin ions.
In addition, the invention also provides the application of the composition in treating circulating cooling water.
The corrosion-inhibition, scale-inhibition and sterilization composition has better corrosion inhibition, scale inhibition and sterilization performances, and the dosage is lower when the composition is used.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Detailed Description
The following describes in detail specific embodiments of the present invention. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
In the present invention, unless otherwise specified, the weight of each material is in terms of an effective amount (or dry basis), e.g., the amount of polymer (including homopolymers and copolymers) is on a dry basis.
The composition for corrosion inhibition, scale inhibition and sterilization comprises water-soluble tin salt, organic phosphonic acid, a nitrogen-containing heterocyclic compound and a copolymer, wherein the copolymer contains a structural unit provided by 2-acrylamide-2-methylpropanesulfonic acid, and the weight percentage of the structural unit provided by 2-acrylamide-2-methylpropanesulfonic acid is more than 20% by taking the total amount of the copolymer as a reference, wherein the weight ratio of the water-soluble tin salt to the organic phosphonic acid to the nitrogen-containing heterocyclic compound to the copolymer is 1 (1-20) to (1-12) to (1-20), and the weight of the water-soluble tin salt is calculated by tin ions.
Preferably, the weight ratio of the water-soluble tin salt to the organophosphonic acid is 1 (4-16) (e.g., 1:4, 1:5, 1:5.5, 1:8, 1:10, 1:11, 1:12, 1:14, 1:15, 1:16, or any value therebetween); and/or the weight ratio of the water-soluble tin salt to the nitrogen-containing heterocyclic compound is 1 (3-10) (such as 1:3, 1:4, 1:5, 1:6, 1:7, 1:8, 1:9, 1:10 or any value between the aforementioned values); and/or the weight ratio of the water-soluble tin salt to the copolymer is 1 (4-16) (e.g., 1:4, 1:5, 1:8, 1:8.5, 1:10, 1:11, 1:12, 1:14, 1:15, 1:16, or any value therebetween).
Wherein, the contents of the above components may be the same or different. Preferably, the composition consists of the above ingredients.
According to the invention, the water-soluble tin salt may be a water-soluble tin salt (solubility ≥ 1g/100g water at 20 ℃) as is common in the art. Preferably, the water-soluble tin salt is selected from at least one of tin chloride, stannous chloride, tin sulfate and tin nitrate.
According to the invention, the organophosphonic acid may be any phosphonic acid commonly used in the art (e.g. having from 1 to 10 carbon atoms (e.g. C)1、C2、C3、C4、C5、C6、C7、C8、C9Or C10) Phosphonic acid). Preferably, the organophosphonic acid is at least one of hydroxyethylidene diphosphonic acid (HEDP), aminotrimethylene phosphonic Acid (ATMP), 2-phosphonobutane-1, 2, 4-tricarboxylic acid (PBTCA), 2-hydroxyphosphonoacetic acid (HPAA), ethylene diamine tetra methylene phosphonic acid, diethylenetriamine pentamethylene phosphonic acid, p-diphosphonic acid, glycine dimethylidene phosphonic acid, glutamic dimethylidene phosphonic acid, sulfamate dimethylidene phosphonic acid, and aminoethane dimethylidene phosphonic acid, more preferably at least one of hydroxyethylidene diphosphonic acid, 2-phosphonobutane-1, 2, 4-tricarboxylic acid, and 2-hydroxyphosphonoacetic acid. The water-soluble tin salt and the organic phosphonic acid have good synergistic effect, and can obtain excellent corrosion and scale inhibition effects when treating circulating cooling water.
According to the present invention, the nitrogen-containing heterocyclic compound is a heterocyclic compound in which the hetero atom is nitrogen (the number of hetero atoms (nitrogen atoms) is 1,2 or 3). In the present invention, the heterocyclic compound may be various nitrogen-containing heterocyclic compounds common in the art, preferably at least one selected from a group consisting of a (substituted or unsubstituted) five-membered heterocyclic compound, a (substituted or unsubstituted) six-membered heterocyclic compound, and a (substituted or unsubstituted) benzene-fused heterocyclic compound (e.g., a heterocyclic compound in which a benzene ring is fused with a five-membered heterocyclic ring and/or a heterocyclic compound in which a benzene ring is fused with a six-membered heterocyclic ring), for example, pyrrole (substituted or unsubstituted), benzopyrrole (substituted or unsubstituted), imidazole (substituted or unsubstituted), benzimidazole (substituted or unsubstituted), pyrazole (substituted or unsubstituted), pyridine (substituted or unsubstituted), pyrazine (substituted or unsubstituted), pyrimidine (substituted or unsubstituted), benzopyrrole (substituted or unsubstituted), At least one of (substituted or unsubstituted) benzopyrimidine, (substituted or unsubstituted) quinoline, (substituted or unsubstituted) isoquinoline, and (substituted or unsubstituted) benzotriazole.
Wherein, the substituted group can be phenyl, hydroxyl, amino, methoxyl, nitryl and C1-C3At least one of alkyl groups (such as methyl group) of (a).
Further preferably, the nitrogen-containing heterocyclic compound is selected from at least one of benzopyrrole, 2-methylimidazole, 3, 5-diphenylpyrazole, 2-phenylpyridine, 2-hydroxypyrazine, 2-amino-5-methoxypyrimidine, 4-methylquinoline, 5-nitroisoquinoline, benzotriazole and methylbenzotriazole.
According to the present invention, the weight percentage of the structural unit provided by 2-acrylamido-2-methylpropanesulfonic acid is 20% or more (preferably 20 to 30%) based on the total amount of the copolymer. The copolymer contains less than 80 wt% (preferably 70-80 wt%) of other structural units.
Preferably, the copolymer has an intrinsic viscosity at 30 ℃ of 0.06 to 0.1dl/g (preferably 0.07 to 0.08 dl/g).
According to the present invention, as long as the copolymer contains a structural unit provided by 2-acrylamido-2-methylpropanesulfonic acid, other structural units contained therein are not particularly limited and may be provided by various monomers commonly used in the art for preparing water treatment agents. Preferably, the other structural unit (not 2-acrylamido-2-methylpropanesulfonic acid) contained in the copolymer is provided by at least one or at least two of an unsaturated organic acid, a salt of an unsaturated organic acid, an unsaturated organic acid anhydride, an unsaturated amide, and an unsaturated organic acid ester.
The unsaturated organic acid is preferably acrylic acid, maleic acid, C1-C10Of unsaturated phosphonic acid and C2-C10At least one of unsaturated sulfonic acids. Said C is2-C10Of unsaturated sulfonic acid (or C)1-C10The unsaturated phosphonic acid) may be various conventional unsaturated sulfonic acids (or phosphonic acids), and may contain a phenyl group, an amide group, etc., in addition to an alkyl group, an alkenyl group, and a sulfonic acid group. Said C is2-C10The unsaturated sulfonic acid of (b) may be at least one of styrene sulfonic acid, allyl sulfonic acid, vinyl sulfonic acid, and 2-methyl-2' -acrylamidopropane sulfonic acid. Said C is1-C10The unsaturated phosphonic acid of (a) may be, for example, 2-acrylamido-2-methylpropanephosphonic acid.
The salt of the unsaturated organic acid may be a salt (e.g., sodium salt and/or potassium salt) of the above-mentioned unsaturated organic acid.
The unsaturated organic acid anhydride is an acid anhydride (e.g., maleic anhydride) of the above unsaturated organic acid.
The unsaturated amide may be an amide formed from the above-mentioned unsaturated organic acid, such as acrylamide and/or methacrylamide.
The unsaturated organic acid ester is an ester of the above unsaturated organic acid (such as acrylic acid ester (such as acrylic acid C)1-C8(C1、C2、C3、C4、C5、C6、C7Or C8) Esters) such as methyl acrylate or hydroxypropyl acrylate).
More preferably, the other structural units contained in the copolymer are provided by at least one or at least two of acrylic acid, maleic anhydride, acrylamide, methacrylamide, styrene sulfonic acid, sodium styrene sulfonate, methyl acrylate, ethyl acrylate, hydroxypropyl acrylate.
Further preferably, the copolymer contains further structural units provided by acrylic acid, acrylamide, acrylic acid and methyl acrylate, acrylic acid and ethyl acrylate, acrylic acid and hydroxypropyl acrylate, acrylic acid and maleic anhydride, acrylic acid and styrene sulfonic acid, acrylic acid and styrene sodium sulfonate, acrylic acid and 2-acrylamido-2-methylpropanephosphonic acid, or acrylamide and methacrylamide.
In practical application, the corrosion-inhibition, scale-inhibition and sterilization composition can be prepared before use, for example, the components are mixed according to the formula and then added into circulating cooling water; the components can also be added directly to the recirculating cooling water in accordance with the foregoing formulation without a mixing step. In order to prevent the water-soluble tin salt from being hydrolyzed to influence the corrosion, scale and sterilization effects of the composition, the organic phosphonic acid, the nitrogen-containing heterocyclic compound and the copolymer are preferably added into the circulating cooling water, and the water-soluble tin salt is then added, and likewise, the adding sequence of the organic phosphonic acid, the nitrogen-containing heterocyclic compound and the copolymer is not limited. In actual use, the copolymer may be added in an effective amount (weight on a dry basis) of 2 to 10 mg/L.
The invention also provides the application of the composition in treating circulating cooling water. The amount of the composition is preferably 6.5 to 28mg/L of circulating water, more preferably 11.5 to 22mg/L of circulating water.
The present invention will be described in detail below by way of examples.
In the following examples, various organophosphonic acids were purchased from Loyang Qianglong industries, Inc.; the copolymers were purchased from Shandongtai and Water treatment science and technology Co.
In the following examples, the water quality of test raw water is shown in table 1. Wherein Ca2+Total alkalinity and total hardness are all as CaCO3The water quality measuring method refers to the cooling water analysis and test method written by the department of production and development of the general petrochemical company of China (1993, published by the information center of the general petrochemical plant in Anqing).
TABLE 1
Test example 1
The stability of the copolymer was evaluated in the following manner.
Preparing Ca from distilled water2+The copolymer (1-8) was added to test water having a concentration of 250mg/L, a basicity of 250mg/L and a tin ion of 5mg/L in accordance with Table 2, and allowed to stand in a constant-temperature water bath at 80. + -. 1 ℃ for 10 hours, and the concentration of the remaining tin ions in the water was analyzed by sampling (by a potassium dichromate method), while making a blank sample, and the tin stability was calculated. The higher the tin stability, the better the stability of the tin salt in water, and the better the performance of the copolymer in stabilizing the tin salt.
The tin stability rate calculation formula is as follows: stable tin rate (C-C)0)/(C1-C0)×100％
C: the concentration (mg/L) of tin ions was measured
C0: concentration of tin ion (mg/L) of blank sample
C1: concentration of tin ion in raw Water (mg/L)
TABLE 2
As can be seen from the test results in Table 2, the copolymer containing a specific amount of the structural unit provided by 2-acrylamido-2-methylpropanesulfonic acid has a very good stabilizing effect on tin salt, which is far superior to other copolymers.
Examples 1 to 4
The test water was dosed with the agents as shown in table 3 and tested for scale inhibition, corrosion inhibition and sterilization performance, the specific test methods being as follows. mg/L in table 3 indicates the effective (dry basis) content, and the tin salt is in terms of tin ions.
Evaluation of Scale inhibition Property
Adding the medicinal preparation into test water, evaporating and concentrating in 80 + -1 deg.C constant temperature water bath to 5 times of concentration ratio, sampling and analyzing residual Ca in water2+And simultaneously making blank samples, and calculating the scale inhibition rate. The calculation formula of the scale inhibition rate is as follows: scale inhibition rate ═ C-C0)/(nC1-C0) X 100%, wherein,
c: residual Ca in water2+Concentration (mg/L)
C0: ca of blank2+Concentration (mg/L)
C1: ca in raw water2+Concentration (mg/L)
n: multiple of concentration
Evaluation of Corrosion inhibition Properties
Fixing 20# high-quality carbon steel test piece on a coupon instrument, putting the test piece into test water (obtained by concentrating test raw water by 5 times and adjusting the pH value) added with a medicament according to each example or comparative example, keeping the constant temperature at 40 +/-1 ℃, keeping the rotating speed at 75rpm for 72 hours, recording the weight of the test piece before and after the test, calculating the average corrosion speed (F), adjusting the pH value in the test process, and calculating the average corrosion speed (F) according to the formula that F is (C multiplied by △ W)/(A multiplied by T multiplied by rho), wherein,
c: the constants were calculated, and when mm/a (mm/year) is used, C is 8.76 × 107
△ W corrosion weight loss (g) of test piece
A: area of test piece (cm)2)
T: corrosion test time (h)
ρ: density of test piece Material (kg/m)3)
Determination of fungicidal Properties
The method for measuring the sterilization performance of the medicament refers to the regulation of static sterilization test of heterotrophic bacteria in the cooling water analysis and test method compiled by the department of production and development of the general chemical company of China.
TABLE 3
From the results in table 3, it can be seen that the corrosion, scale and sterilization composition of the present invention has good corrosion, scale and sterilization performance.
Comparative example 1
The formulation was dosed as in example 1, except that copolymer 1 was replaced by copolymer 6, and the scale inhibition was measured to be 60.4%, F was 0.083mm/a, and the sterilization rates at different times (1h, 4h, 8h, 12h and 24h) were 82.1%, 75.0%, 61.2%, 53.3% and 33.2%, respectively.
Comparative example 2
The reagents were dosed as in example 1, except that copolymer 1 was replaced by copolymer 7, and the scale inhibition was measured to be 58.3%, F was 0.090mm/a, and the sterilization rates at different times (1h, 4h, 8h, 12h and 24h) were 81.4%, 70.3%, 53.9%, 43.2% and 30.1%, respectively.
Example 5
To simulate the field, dynamic simulation tests were performed. The dynamic simulation test method is carried out according to the chemical industry standard HG/T2160-91 of the people's republic of China, and the control parameters are as follows.
Water quality: test raw water 1, see table 1.
Concentration multiple: tower A4.0 plus or minus 0.2 tower B4.0 plus or minus 0.2
pH: tower A control 8.0 plus or minus 0.2 tower B control 8.0 plus or minus 0.2
Flow rate: 1.0m/s
Medicament:
tower A: weighing 4g of PBTCA with effective content of 50 wt%, 8g of HEDP with effective content of 50 wt%, 3g of benzotriazole and 26.7g of copolymer 1 with solid content of 30 wt%, dissolving in 56.8g of water, finally adding 1.5g of stannic chloride pentahydrate, fully dissolving, and shaking up to obtain 100g of the required prepared medicament.
When the prepared medicament is added into water according to the medicament concentration of 100mg/L, the effective concentrations of PBTCA, HEDP, sodium gluconate, benzotriazole, copolymer 1 and tin ions in the water are respectively 2mg/L, 4mg/L, 3mg/L, 8mg/L and 0.5 mg/L.
Tower B: weighing 8g of HPAA with the effective content of 50 percent by weight, 12g of ATMP with the effective content of 50 percent by weight and 33.3g of copolymer 8 with the solid content of 30 percent by weight, dissolving in 42.6g of water, finally adding 4.1g of tin nitrate to fully dissolve, and shaking up to obtain 100g of the medicament required to be prepared.
When the prepared medicament is added into water according to the medicament concentration of 100mg/L, the effective concentrations of HPAA, ATMP, copolymer 8 and tin ions in the water are respectively 4mg/L, 6mg/L, 10mg/L and 2 mg/L.
Inlet temperature: temperature difference of 32. + -. 1 ℃:10 deg.C
The heterotrophic bacteria monitoring results during the dynamic simulation test are shown in table 4, and the test tube results are shown in table 5.
TABLE 4
TABLE 5
The corrosion speed of the carbon steel pipe wall of the open system is less than or equal to 0.125mm/a as specified in the national standard GB50050-95 design Specification for Industrial circulating Cooling Water treatment 3.1.6; in the cooling water analysis and test method compiled by the production department and the development department of the general company of petrochemical industry, the laboratory small simulation test method stipulates that the corrosion speed of carbon steel is in a good grade between 0 and 0.028mm/a, in a good grade between 0.028 and 0.056mm/a and in an allowable grade between 0.056 and 0.070 mm/a; the adhesion speed is of the order of "good" at 0-6mcm, of "good" at 6-15mcm and of "permissible" at 15-20 mcm.
Therefore, the corrosion rate of the test tube is 0.020mm/a, the corrosion rate reaches the medium petrochemical good-grade standard, the adhesion rate is 5.0 mm, the corrosion rate reaches the good-grade standard, and the corrosion rate is superior to that of a comparative example. The test result shows that the corrosion-inhibition, scale-inhibition and sterilization composition has good comprehensive performance, good calcium carbonate scale inhibition performance and corrosion inhibition performance, and good sterilization performance, and is suitable for the treatment of circulating cooling water.
The preferred embodiments of the present invention have been described in detail, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention.
It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and the invention is not described in any way for the possible combinations in order to avoid unnecessary repetition.
In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.
Claims (14)
1. The composition for corrosion inhibition, scale inhibition and sterilization is characterized by comprising a water-soluble tin salt, organic phosphonic acid, a nitrogen-containing heterocyclic compound and a copolymer, wherein the copolymer contains a structural unit provided by 2-acrylamide-2-methylpropanesulfonic acid, and the weight percentage of the structural unit provided by 2-acrylamide-2-methylpropanesulfonic acid is more than 20% based on the total amount of the copolymer, wherein the weight ratio of the water-soluble tin salt to the organic phosphonic acid to the nitrogen-containing heterocyclic compound to the copolymer is 1:1-20:1-12:1-20, and the weight of the water-soluble tin salt is calculated by tin ions.
2. The composition of claim 1, wherein the water-soluble tin salt, the organophosphonic acid, the nitrogen-containing heterocyclic compound, and the copolymer are present in a weight ratio of 1:4 to 16:3 to 10:4 to 16.
3. The composition of claim 1 or 2, wherein the water soluble tin salt is selected from at least one of tin chloride, stannous chloride, tin sulfate, and tin nitrate.
4. The composition of claim 1 or 2, wherein the organophosphonic acid is C1-C10Of (a) an organic phosphonic acid.
5. The composition of claim 4, wherein the organophosphonic acid is at least one of hydroxyethylidene diphosphonic acid, aminotrimethylidene phosphonic acid, 2-phosphono-1, 2, 4-tricarboxylic acid butane, 2-hydroxyphosphonoacetic acid, ethylenediaminetetramethylene phosphonic acid, diethylenetriaminepentamethylene phosphonic acid, p-diphosphonic acid, glycine dimethylidene phosphonic acid, glutamic acid dimethylidene phosphonic acid, sulfamic acid dimethylidene phosphonic acid, and aminoethanesulfonic acid dimethylidene phosphonic acid.
6. The composition according to claim 1 or 2, wherein the nitrogen-containing heterocyclic compound is at least one selected from the group consisting of a substituted or unsubstituted five-membered heterocyclic compound, a substituted or unsubstituted six-membered heterocyclic compound, and a substituted or unsubstituted benzene-fused heterocyclic compound.
7. The composition of claim 6, wherein the nitrogen-containing heterocyclic compound is selected from at least one of benzopyrrole, 2-methylimidazole, 3, 5-diphenylpyrazole, 2-phenylpyridine, 2-hydroxypyrazine, 2-amino-5-methoxypyrimidine, 4-methylquinoline, 5-nitroisoquinoline, benzotriazole and methylbenzotriazole.
8. The composition according to claim 1 or 2, wherein the copolymer has an ultimate viscosity at 30 ℃ of 0.06-0.1 dl/g.
9. The composition according to claim 1 or 2, wherein the copolymer contains other structural units provided by at least one of an unsaturated organic acid, a salt of an unsaturated organic acid, an unsaturated organic acid anhydride, an unsaturated amide and an unsaturated organic acid ester.
10. The composition of claim 9, wherein the copolymer contains additional structural units provided by at least one of acrylic acid, maleic anhydride, acrylamide, methacrylamide, styrene sulfonic acid, sodium styrene sulfonate, methyl acrylate, ethyl acrylate, hydroxypropyl acrylate.
11. The composition of claim 10, wherein the copolymer contains additional structural units provided by acrylic acid, acrylamide, acrylic acid and methyl acrylate, acrylic acid and ethyl acrylate, acrylic acid and hydroxypropyl acrylate, acrylic acid and maleic anhydride, acrylic acid and styrene sulfonic acid, sodium acrylic acid and styrene sulfonate, acrylic acid and 2-acrylamido-2-methylpropanephosphonic acid, or acrylamide and methacrylamide.
12. Use of a composition according to any one of claims 1 to 11 for the treatment of recirculating cooling water.
13. Use according to claim 12, wherein the composition is used in an amount of 6.5-28mg/L of circulating water.
14. Use according to claim 13, wherein the composition is used in an amount of 11.5-22mg/L of circulating water.
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| CN108623020A (en) * | 2018-05-11 | 2018-10-09 | 西安晶达化工有限公司 | A kind of novel corrosion-retarding antisludging agent and the preparation method and application thereof |
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