CN115572591A - Triazine high-temperature-resistant corrosion inhibitor and preparation method thereof - Google Patents
Triazine high-temperature-resistant corrosion inhibitor and preparation method thereof Download PDFInfo
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Abstract
A triazine high temperature resistant corrosion inhibitor and a preparation method thereof, comprising alcohol amine components, triazine derivatives, an auxiliary agent and water, wherein the structural formula of the triazine derivatives is as follows:
Description
Technical Field
The invention belongs to the field of sulfur-containing oil and gas field development, and particularly relates to a high-temperature-resistant corrosion inhibitor.
Background
At present, about 25% of reserves of oil and gas fields in China are sulfur-containing oil and gas. In the development of sulfur-containing oil and gas fields, the main danger is derived from hydrogen sulfide generated in the oil and gas exploitation process, the hydrogen sulfide is a high-risk and highly toxic acid gas, severe corrosion can be caused to oil pipelines and instruments, and in addition, the personal safety is seriously threatened due to the highly toxic hydrogen sulfide. Therefore, a high-performance corrosion inhibitor is urgently needed to be developed to solve the corrosion problem of an oil-gas well gathering and transportation system, a sewage treatment system and a sewage reinjection system.
The triazine compound is a six-membered ring compound which is formed by substituting nitrogen atoms on the basis of cyclohexane or benzene rings and has a 1,3,5 position as a nitrogen atom. Triazine and derivatives thereof have wide application in the chemical field, and can be used as herbicides, explosives, flame retardants, light stabilizers, antitumor drugs, bactericides and the like. The research of foreign scholars on triazine desulfurizer is early, U.S. Quaker company published as early as 1989 in patent US4978512 reports a synthesis method of 1,3,5-tris (2-hydroxyethyl) -1,3,5-hexahydrotriazine water-soluble desulfurizer, and the characteristics of high selectivity, irreversibility and high reaction speed of the compound and hydrogen sulfide are described. U.S. Pat. No. 5, 5554349 of Baker Hughes also reports a method for synthesizing triazine desulfurizer by using mixed organic amine and formaldehyde. In China, the application research of triazine desulfurizer is started late, and patents with the publication number of CN 101063046A such as Chinese academy of sciences Zhang Suojiang report a method for preparing an ionic liquid desulfurizer by compounding alcohol amine or s-triazine with ionic liquid. The compounding of oxazolidines and s-triazine is reported in patent CN 105056710A of Shengli oil field Xu Lei and the like, which can improve the water solubility of products, the reaction rate and the reaction efficiency of desulfurizing agents and hydrogen sulfide.
The traditional corrosion inhibitor for the oil and gas field mainly adopts the imidazole forest and the derivatives thereof as active corrosion inhibition components, and due to the structural characteristics, the hybridization degree of the traditional corrosion inhibitor with empty orbits on metal atoms in carbon steel of the oil field and the adsorption capacity of the traditional corrosion inhibitor for the metal ions need to be improved, so that the corrosion inhibition efficiency of the traditional corrosion inhibitor for the oil and gas field is not ideal, especially, the bottom temperature of a single well of the oil and gas field is higher, crude oil needs to go through a high-temperature stage, and the corrosion inhibition resistance efficiency of common alkaline sym-triazine is lower.
Disclosure of Invention
The invention provides a triazine high-temperature-resistant corrosion inhibitor and a preparation method thereof, aiming at solving the technical problem of low corrosion inhibition resistance efficiency of the existing common alkaline sym-triazine.
The triazine high-temperature-resistant corrosion inhibitor is characterized by comprising alcohol amine components, triazine derivatives, an auxiliary agent and water, wherein the structural formula of the triazine derivatives is as follows:
wherein R is nitrogen-containing alkyl sulfonic acid, R1 is alkyl, R2 is aryl, 15-25 parts of alcohol amine component, 30-40 parts of triazine derivative, 5-10 parts of assistant and 30-50 parts of water are calculated according to parts by weight, the assistant comprises nonylphenol polyoxyethylene ether, and the hydroxyl value is 85-160mgKOH/g.
As a preferable technical scheme, the corrosion inhibitor also comprises 5-15 parts of 1- (phenylmethyl) pyridinium ethyl methyl derivative chloride.
As a preferable technical solution, the alkanolamine component comprises at least one of triethanolamine, diethanolamine, monoisopropanolamine, diisopropanolamine, triisopropanolamine, N-methyldiethanolamine, and N, N-diethylethanolamine.
Preferably, the alkanolamines include triisopropanolamine and N-methyldiethanolamine. The weight ratio of the triisopropanolamine to the N-methyldiethanolamine is 1:1.5-2.5.
As a preferred technical scheme, R is C8-C12 alkyl sulfonic acid containing nitrogen; r1 is nitrogen-containing C2-C8 alkyl.
As a preferable technical scheme, the auxiliary agent also comprises at least one of coconut oil fatty acid diethanolamide, polyethylene glycol dioleate, fatty alcohol-polyoxyethylene ether and C2-C6 alcohol.
As a preferable technical scheme, the auxiliary agent comprises coconut oil fatty acid diethanolamide, nonylphenol polyoxyethylene ether and n-hexanol.
As a preferable technical scheme, the pH value of the nonylphenol polyoxyethylene ether is 5-7.
The second aspect of the invention provides a preparation method of the high temperature resistant corrosion inhibitor, firstly, triazine derivatives are prepared, (1) 1mol of cyanuric chloride (CAS number is 108-77-0) is dissolved in 800mL of toluene, 1L of 1mol/L of isodecyl amine toluene solution is added, after 2 hours of stirring, 1000mL of 1mol/L of sodium carbonate aqueous solution is added, and after reaction, a first compound is obtained through layering and washing; (2) Dissolving the obtained compound I in 600mL of acetone, then adding 1L of 1mol/L of 2-aminobenzimidazole acetone solution, stirring for 2 hours, adding 1000mL of 1mol/L of sodium carbonate aqueous solution, reacting at 40 ℃, filtering after the reaction is finished, and washing to obtain a compound II; (3) Dissolving the compound II in 500mL of 1, 4-dioxane, adding 1000mL of 1 mol/L5-aminopentane-1-sulfonic acid (CAS No. 37043-68-8) aqueous solution, stirring for 2 hours, adding 1000mL of 1mol/L sodium carbonate aqueous solution, reacting at 90 ℃, filtering after the reaction is finished, washing to obtain the triazine derivative, and then uniformly stirring all the components in a reaction kettle to obtain the triazine derivative.
The invention has the following beneficial effects:
according to the invention, triazine derivatives are selected and compounded with alcamines components, 1- (phenylmethyl) pyridinium ethyl methyl derivative chloride and the like, and molecules of the corrosion inhibitor contain a plurality of sulfonic acids, ammonium ions and the like, so that chelation can be generated between the corrosion inhibitor and metal, and the molecules of the corrosion inhibitor are more tightly adsorbed on the metal. Particularly, the triazine derivative prepared by the method comprises a six-membered heterocyclic ring and a benzimidazole ring, and has a plurality of nitrogen atoms, oxygen atoms and sulfur atoms, and can be hybridized with empty orbitals on metal atoms in oil field carbon steel to form stronger adsorbability, and the large pi bond structure of the six-membered heterocyclic ring and the benzimidazole ring can be more tightly adsorbed on the carbon steel to inhibit corrosion of the carbon steel, and when the hydroxyl value of the nonylphenol polyoxyethylene ether is 85-160mgKOH/g and the pH value is 5-7, the obtained corrosion inhibitor has a good corrosion inhibition effect on N80 steel.
Preferably, when the alcamines include triisopropanolamine and N-methyldiethanolamine, the corrosion inhibitor is dripped on carbon steel, alkyl in a molecular structure is far away from metal, hydroxyl and the like are adsorbed on the metal surface, and N atoms in molecules are coordinated with metal orbitals to better spread on the metal surface to form a hydrophobic protective film.
The coconut oil fatty acid diethanolamide is a nonionic surfactant and has no cloud point. The liquid is a yellowish to amber viscous liquid, is easy to dissolve in water, and has good functions of foaming, foam stabilization, penetration decontamination, hard water resistance and the like. Belongs to a nonionic surfactant, has a particularly obvious thickening effect when being compatible with an anionic surfactant when the anionic surfactant is acidic, and can be compatible with various surfactants.
The invention has small usage amount, excellent corrosion inhibition performance and sterilization performance, and no sulfur is introduced, thereby greatly reducing corrosion risk.
Detailed Description
In order that the invention may be better understood, it is described in detail below by way of examples. It should be noted that the following examples are only for illustrating the present invention and should not be construed as limiting the scope of the present invention, and that the insubstantial modifications and adaptations of the present invention by those skilled in the art based on the above disclosure are still within the scope of the present invention.
In addition, the starting materials used are all commercially available, unless otherwise specified.
Example 1
The triazine high-temperature-resistant corrosion inhibitor of the embodiment comprises, by weight, 22 parts of alcohol amine component, 34 parts of triazine derivative, 6 parts of auxiliary agent, 42 parts of water, and 10 parts of 1- (phenylmethyl) pyridinium ethyl methyl derivative chloride. The CAS number of the 1- (phenylmethyl) pyridinium ethylmethyl derivative chloride is 68909-18-2.
The alcamines comprise triisopropanolamine and N-methyldiethanolamine, and the weight ratio of the triisopropanolamine to the N-methyldiethanolamine is 1:2.
the preparation method of the triazine derivative of the embodiment comprises the following steps: (1) Dissolving 1mol of cyanuric chloride (CAS number 108-77-0) in 800mL of toluene, adding 1L1mol/L of toluene solution of isodecyl amine (CAS number 1282-85-5), stirring for 2 hours, adding 1000mL1mol/L of sodium carbonate aqueous solution, reacting, and obtaining a compound I through layering and washing; (2) Dissolving the obtained compound I in 600mL of acetone, then adding 1L1mol/L acetone solution of 2-aminobenzimidazole, stirring for 2 hours, adding 1000mL1mol/L sodium carbonate aqueous solution, reacting at 40 ℃, filtering after the reaction is finished, and washing to obtain a compound II; (3) Dissolving the compound II in 500mL of 1, 4-dioxane, adding 1000mL of 1mol/L5-aminopentane-1-sulfonic acid (CAS No. 37043-68-8) aqueous solution, stirring for 2 hours, adding 1000mL of 1mol/L sodium carbonate aqueous solution, reacting at 90 ℃, filtering after the reaction is finished, and washing to obtain the triazine derivative. Wherein, the completion of the reaction is detected by TLC thin layer chromatography in all three steps.
According to the high-temperature-resistant corrosion inhibitor, the generation of nonpolar chains and polar groups on a triazine derivative structure is controlled by selecting isodecylamine, 2-aminobenzimidazole and 5-aminopentane-1-sulfonic acid; the triazine derivative contains triazine ring, has more active adsorption centers than 2-aminobenzimidazole, the triazine ring can be coplanar with nitrogen atoms in molecules to form conjugated pi bonds, and pi electrons are easier to generate chemical adsorption with metals in N80 steel due to the delocalization property of the conjugation effect; the solubility of the triazine derivative is not influenced, and an adsorption film formed on the surface of the N80 steel is thickened as much as possible, so that the corrosion inhibition efficiency of the corrosion inhibitor is improved, and the adsorption effect on the surface of the N80 steel under a high-temperature condition is enhanced; n, O atom and sulfonic acid group on triazine derivative and hydroxy and amido of coconut oil fatty acid diethanolamide, nonyl phenol polyethenoxy ether and n-hexanol generate intermolecular interaction, so that the migration speed of triazine derivative in the system is improved.
The auxiliary agent comprises coconut oil fatty acid diethanolamide, nonylphenol polyoxyethylene ether and n-hexanol; the weight ratio of the coconut oil fatty acid diethanolamide to the nonyl phenol polyoxyethylene ether to the n-hexanol is 1:1:3, the polyoxyethylene nonyl phenyl ether is a nonionic surfactant which is obtained by condensation reaction of nonyl phenol and ethylene oxide under the action of a catalyst, the hydroxyl value is 135-145mgKOH/g, the pH value is 5.5-7, the product name is TX-6, and the method for testing the hydroxyl value is a method commonly used in the field.
The components are uniformly stirred in a reaction kettle to obtain the high-temperature resistant corrosion inhibitor of the embodiment.
Example 2
The triazine high-temperature-resistant corrosion inhibitor comprises, by weight, 17 parts of alcohol amine components, 39 parts of triazine derivatives, 8 parts of auxiliaries, 34 parts of water and 10 parts of 1- (phenylmethyl) pyridinium ethyl methyl derivative chloride. The CAS number of the 1- (phenylmethyl) pyridinium ethylmethyl derivative chloride is 68909-18-2.
The alcamines comprise triisopropanolamine and N-methyldiethanolamine, wherein the weight ratio of the triisopropanolamine to the N-methyldiethanolamine is 1:2.
the preparation method of the triazine derivative of the embodiment comprises the following steps: (1) Dissolving 1mol of cyanuric chloride (CAS number 108-77-0) in 800mL of toluene, adding 1L1mol/L of toluene solution of isodecyl amine (CAS number 1282-85-5), stirring for 2 hours, adding 1000mL1mol/L of sodium carbonate aqueous solution, reacting, and obtaining a compound I through layering and washing; (2) Dissolving the obtained compound I in 600mL of acetone, then adding 1L1mol/L acetone solution of 2-aminobenzimidazole, stirring for 2 hours, adding 1000mL1mol/L sodium carbonate aqueous solution, reacting at 40 ℃, filtering after the reaction is finished, and washing to obtain a compound II; (3) Dissolving the compound II in 500mL of 1, 4-dioxane, adding 1000mL of 1 mol/L5-aminopentane-1-sulfonic acid (CAS number is 37043-68-8) water solution, stirring for 2 hours, adding 1000mL of 1mol/L sodium carbonate water solution, reacting at 90 ℃, filtering after the reaction is finished, and washing to obtain the triazine derivative. Wherein, the completion of the reaction is detected by TLC thin layer chromatography in all three steps.
According to the high-temperature-resistant corrosion inhibitor, the generation of nonpolar chains and polar groups on a triazine derivative structure is controlled by selecting isodecylamine, 2-aminobenzimidazole and 5-aminopentane-1-sulfonic acid; the triazine derivative contains triazine ring, has more active adsorption centers than 2-aminobenzimidazole, the triazine ring can be coplanar with nitrogen atoms in molecules to form conjugated pi bonds, and pi electrons are easier to generate chemical adsorption with metals in N80 steel due to the delocalization property of the conjugation effect; the solubility of the triazine derivative is not influenced, and an adsorption film formed on the surface of the N80 steel is thickened as much as possible, so that the corrosion inhibition efficiency of the corrosion inhibitor is improved, and the adsorption effect on the surface of the N80 steel under a high-temperature condition is enhanced; the N, O atom and the sulfonic acid group on the triazine derivative have intermolecular interaction with the hydroxyl and the amido of coconut oil fatty acid diethanolamide, nonylphenol polyoxyethylene ether and n-hexanol, so that the migration speed of the triazine derivative in a system is improved.
The auxiliary agent comprises coconut oil fatty acid diethanolamide, nonylphenol polyoxyethylene ether and n-hexanol; the weight ratio of the coconut oil fatty acid diethanolamide to the nonyl phenol polyoxyethylene ether to the n-hexanol is 1:1:3, the polyoxyethylene nonyl phenyl ether is a nonionic surfactant which is obtained by condensation reaction of nonyl phenol and ethylene oxide under the action of a catalyst, the hydroxyl value is 90-110mgKOH/g, the pH value is 5.5-7, and the method for testing the hydroxyl value is a method commonly used in the field.
The components are uniformly stirred in a reaction kettle to obtain the high-temperature resistant corrosion inhibitor of the embodiment.
Comparative example 1
The triazine high-temperature-resistant corrosion inhibitor of the comparative example is different from that of example 1 in that the auxiliary comprises coconut oil fatty acid diethanolamide and n-hexanol, and non-nonylphenol polyoxyethylene ether; the weight ratio of the coconut oil fatty acid diethanolamide to the n-hexanol is 1:3.
comparative example 2
The triazine high-temperature-resistant corrosion inhibitor of the comparative example comprises 16 parts by weight of alcamines, 38 parts by weight of triazine derivatives, 9 parts by weight of auxiliary agents, 48 parts by weight of water and 14 parts by weight of 1- (phenylmethyl) pyridinium ethyl methyl derivative chloride.
The alcamines comprise triisopropanolamine and N-methyldiethanolamine, wherein the weight ratio of the triisopropanolamine to the N-methyldiethanolamine is 1:2.
the auxiliary agent comprises coconut oil fatty acid diethanolamide, nonylphenol polyoxyethylene ether and n-hexanol; the weight ratio of the coconut oil fatty acid diethanolamide to the nonyl phenol polyoxyethylene ether to the n-hexanol is 1:1:3, the hydroxyl value of the nonylphenol polyoxyethylene ether is 60-65mgKOH/g, and the trade name is TX-15.
The preparation method of the triazine derivative of the present comparative example includes the following steps: (1) Dissolving 1mol of cyanuric chloride (CAS number 108-77-0) in 800mL of toluene, adding 1L of 1mol/L of isodecylamine toluene solution, stirring for 2 hours, adding 1000mL of 1mol/L of sodium carbonate aqueous solution, reacting, and layering and washing to obtain a compound I; (2) Dissolving the obtained compound I in 600mL of acetone, then adding 1L1mol/L acetone solution of 2-aminobenzimidazole, stirring for 2 hours, adding 1000mL1mol/L sodium carbonate aqueous solution, reacting at 40 ℃, filtering after the reaction is finished, and washing to obtain a compound II; (3) Dissolving the compound II in 500mL of 1, 4-dioxane, adding 1000mL of 1mol/L5-aminopentane-1-sulfonic acid (CAS No. 37043-68-8) aqueous solution, stirring for 2 hours, adding 1000mL of 1mol/L sodium carbonate aqueous solution, reacting at 90 ℃, filtering after the reaction is finished, and washing to obtain the triazine derivative.
The preparation method of the high temperature resistant corrosion inhibitor of this comparative example is the same as that of example 1.
Comparative example 3
The triazine high-temperature-resistant corrosion inhibitor of the comparative example is different from the triazine high-temperature-resistant corrosion inhibitor of the example 1 in that the preparation method of the triazine derivative comprises the following steps: (1) Dissolving 1mol of cyanuric chloride (CAS number 108-77-0) in 800mL of toluene, adding 1L of 1mol/L of isodecylamine toluene solution, stirring for 2 hours, adding 1000mL of 1mol/L of sodium carbonate aqueous solution, reacting, and layering and washing to obtain a compound I; (2) Dissolving the obtained compound I in 600mL of acetone, adding 1L1mol/L acetone solution of 2-aminobenzimidazole, stirring for 2 hours, adding 1000mL1mol/L sodium carbonate aqueous solution, reacting at 40 ℃, filtering after the reaction is finished, and washing to obtain a compound II. The compound II is a triazine derivative.
Comparative example 4
The triazine high-temperature-resistant corrosion inhibitor of the comparative example is different from the triazine high-temperature-resistant corrosion inhibitor of the example 1 in that the preparation method of the triazine derivative comprises the following steps: (1) Dissolving 1mol of cyanuric chloride (CAS number 108-77-0) in 800mL of toluene, adding 1L of 1mol/L of isodecylamine toluene solution, stirring for 2 hours, adding 1000mL of 1mol/L sodium carbonate aqueous solution, reacting, and layering and washing to obtain a compound I; (2) Dissolving the compound I in 500mL of 1, 4-dioxane, adding 1000mL of 1mol/L5-aminopentane-1-sulfonic acid (CAS No. 37043-68-8) aqueous solution, stirring for 2 hours, adding 1000mL of 1mol/L sodium carbonate aqueous solution, reacting at 90 ℃, filtering after the reaction is finished, and washing to obtain the triazine derivative.
Comparative example 5
The triazine high-temperature-resistant corrosion inhibitor of the comparative example is different from the triazine high-temperature-resistant corrosion inhibitor of the example 1 in that the preparation method of the triazine derivative comprises the following steps: (1) Dissolving 1mol of cyanuric chloride (CAS number is 108-77-0) in 800mL of toluene, adding 1L of 1mol/L toluene solution of 1-aminohexane (non-isodecylamine), stirring for 2 hours, adding 1000mL of 1mol/L sodium carbonate aqueous solution, reacting, and obtaining a compound I through layering and washing; (2) Dissolving the obtained compound I in 600mL of acetone, adding 1L of 1mol/L acetone solution of 2-aminobenzimidazole, stirring for 2 hours, adding 1000mL of 1mol/L sodium carbonate aqueous solution, reacting at 40 ℃, filtering after the reaction is finished, and washing to obtain a compound II; (3) Dissolving the compound II in 500mL of 1, 4-dioxane, adding 1000mL of 1mol/L5-aminopentane-1-sulfonic acid (CAS No. 37043-68-8) aqueous solution, stirring for 2 hours, adding 1000mL of 1mol/L sodium carbonate aqueous solution, reacting at 90 ℃, filtering after the reaction is finished, and washing to obtain the triazine derivative.
Performance testing
And (3) corrosion inhibition rate: according to the national standard GB/10124-88 Uniform Corrosion test method in Metal Material laboratories, weighed N80 is respectively hung in simulated corrosive media (the total mineralization of the simulated corrosive media is 230000mg/L, ca is added in 2+ The concentration is 10000Mg/L, mg 2+ Concentration of 1000 mg/L), 1% of oxygen gas is introduced, the mixture is placed at 140 ℃ for 96 hours, then N80 is taken out, the mixture is weighed after being cleaned and dried, and the corrosion inhibition rate is calculated according to the mass loss of the N80. Wherein, the corrosion inhibition rate is more than 95 percent, and the corrosion inhibition rate is more than or equal to 80 percent and less than 95 percent; less than 80% is a difference.
| Corrosion inhibitor | Inhibition ratio (%) |
| Example 1 | Superior food |
| Example 2 | Superior food |
| Comparative example 1 | In |
| Comparative example 2 | In |
| Comparative example 3 | Difference (D) |
| Comparative example 4 | Difference (D) |
| Comparative example 5 | In |
Furthermore, the corrosion inhibitor described in example 1/2 was used for corrosion inhibition of P110 steel, and the corrosion inhibition efficiency was found to be not more than 80%.
While the invention has been described with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention.
Claims (9)
1. The triazine high-temperature-resistant corrosion inhibitor is characterized by comprising alcohol amine components, triazine derivatives, an auxiliary agent and water, wherein the structural formula of the triazine derivatives is as follows:
wherein R is nitrogen-containing alkyl sulfonic acid, R1 is alkyl, R2 is aryl, 15-25 parts of alcohol amine component, 30-40 parts of triazine derivative,5-10 parts of an auxiliary agent and 30-50 parts of water, wherein the auxiliary agent comprises nonylphenol polyoxyethylene ether, and the hydroxyl value is 85-160mgKOH/g.
2. The corrosion inhibitor of claim 1 further comprising 5 to 15 parts of 1- (phenylmethyl) pyridinium ethylmethyl derivative chloride.
3. The corrosion inhibitor of claim 1, characterized in that the alkanolamine component comprises at least one of triethanolamine, diethanolamine, monoisopropanolamine, diisopropanolamine, triisopropanolamine, N-methyldiethanolamine, N-diethylethanolamine.
4. The corrosion inhibitor according to claim 3, characterized in that the alcamines comprise triisopropanolamine and N-methyldiethanolamine in a weight ratio of 1:1.5-2.5.
5. The corrosion inhibitor of claim 1, wherein R is a nitrogen-containing C8-C12 alkyl sulfonic acid; r1 is nitrogen-containing C2-C8 alkyl.
6. The corrosion inhibitor of claim 1 wherein said adjuvant further comprises at least one of coconut oil fatty acid diethanolamide, polyethylene glycol dioleate, fatty alcohol polyoxyethylene ether, and C2-C6 alcohols.
7. The corrosion inhibitor of claim 6, characterized in that the adjuvant is a combination of coconut oil fatty acid diethanolamide, nonylphenol polyoxyethylene ether and n-hexanol.
8. The corrosion inhibitor of claim 1, characterized in that said nonylphenol polyoxyethylene ether has a pH of from 5 to 7.
9. A process for preparing triazine high temperature corrosion inhibitor according to any of claims 1 to 8, wherein:
firstly, the triazine derivative is prepared,
(1) Dissolving cyanuric chloride in toluene, adding a toluene solution of isodecyl alkylamine, stirring, adding a sodium carbonate aqueous solution, reacting, and layering and washing to obtain a compound I;
(2) Dissolving the obtained compound I in acetone, adding an acetone solution of 2-aminobenzimidazole, stirring, adding a sodium carbonate aqueous solution, reacting at 35-45 ℃, filtering after the reaction is finished, and washing to obtain a compound II;
(3) Dissolving the compound II in 1,4-dioxane, adding 5-aminopentane-1-sulfonic acid aqueous solution, stirring, adding sodium carbonate aqueous solution, reacting at 85-95 ℃, filtering after the reaction is finished, and washing to obtain the triazine derivative;
wherein the mass portions of the cyanuric chloride, the isodecylamine, the sodium carbonate in the step (1), the 2-aminobenzimidazole, the sodium carbonate in the step (2), the 5-aminopentane-1-sulfonic acid and the sodium carbonate in the steps (1 and 3) are all 0.9 to 1;
and then uniformly stirring all the components in a reaction kettle to obtain the catalyst.
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