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CN-122010316-A - High-mineralization sulfur-containing water slow-release treatment method, anti-biodegradation corrosion inhibitor and preparation method thereof

CN122010316ACN 122010316 ACN122010316 ACN 122010316ACN-122010316-A

Abstract

The invention belongs to the field of wastewater treatment, and provides a high-mineralization sulfur-containing water slow-release treatment method, an anti-biodegradation corrosion inhibitor and a preparation method thereof. The method comprises the steps of adding an anti-biodegradation corrosion inhibitor into oil field injection water and produced sewage, wherein the water treatment agent is water-soluble oil dispersion, and is compounded by cationic antibacterial microgel dispersion liquid, rare earth phosphonic acid hybridization microgel dispersion liquid and a synergistic inhibitor solution, and the cationic antibacterial microgel is obtained by cross-linking polymerization of hydantoin structure-containing monomers, sulfobetaine type monomers, palmitoleic acid imidazoline methacrylate quaternary ammonium salt and methacryloxypropyl mono-end polydimethylsiloxane in a hydroalcoholic system.

Inventors

  • YANG ZHEN
  • LUO XUEJUN
  • WANG HONG
  • LI PING
  • CHANG YUJIE
  • Xue Lubo
  • YAN XIAOCHEN

Assignees

  • 南京华洲新材料有限公司
  • 濮阳市万良石油科技发展有限公司

Dates

Publication Date
20260512
Application Date
20260410

Claims (10)

  1. 1. A method for preparing an anti-biodegradation corrosion inhibitor, which is characterized by comprising the following steps: S1, mixing deionized water with anhydrous isopropanol, sequentially adding 3- (4-vinylbenzyl) -5, 5-dimethylhydantoin, methacryloxyethyl sulfobetaine, imidazoline methacrylate quaternary ammonium palmitate and methacryloxypropyl mono-terminated polydimethylsiloxane, then adding N, N' -methylenebisacrylamide and ammonium persulfate aqueous solution for reaction, and adding triethylene glycol after finishing to obtain cationic antibacterial microgel dispersion; S2, adding cerium nitrate hexahydrate into deionized water to obtain cerium salt solution, dropwise adding the cerium salt solution into cationic antibacterial microgel dispersion liquid, adding amino trimethylene phosphonic acid aqueous solution into the cationic antibacterial microgel dispersion liquid, regulating pH with nitric acid solution, and continuously stirring to obtain rare earth-phosphonic acid hybrid microgel dispersion liquid; S3, mixing deionized water with triethylene glycol, and sequentially adding hydroxyethyl hexahydro-S-triazine, urotropine, cetylpyridinium chloride and 5, 5-dimethyl hydantoin to obtain a synergistic inhibitor solution; S4, mixing deionized water and triethylene glycol, sequentially adding rare earth-phosphonic acid hybrid microgel dispersion liquid and a synergistic inhibitor solution, and then adding fatty alcohol polyoxyethylene ether, cocamidopropyl betaine and a monoethanolamine aqueous solution to obtain the biodegradation-resistant corrosion inhibitor.
  2. 2. The method for preparing the anti-biodegradation corrosion inhibitor according to claim 1, wherein the preparation method of the 3- (4-vinylbenzyl) -5, 5-dimethylhydantoin is as follows: a1, adding 5, 5-dimethyl hydantoin and sodium hydroxide into ethanol water solution to obtain alkaline solution, and dropwise adding 4-vinylbenzyl chloride into the alkaline solution to react to obtain 3- (4-vinylbenzyl) -5, 5-dimethyl hydantoin.
  3. 3. The method for preparing the anti-biodegradation corrosion inhibitor according to claim 1, wherein the method for preparing the imidazoline palmitate methacrylate quaternary ammonium salt is as follows: A2, mixing palmitic acid, diethylenetriamine and xylene for reaction to obtain a palmitic acid imidazoline intermediate, mixing the palmitic acid imidazoline intermediate, 2-chloroethanol and first absolute ethanol for reaction to obtain hydroxyethyl palmitic acid imidazoline, dispersing the hydroxyethyl palmitic acid imidazoline in absolute dichloromethane, adding triethylamine and dropwise adding methacryloyl chloride to obtain a palmitic acid imidazoline methacrylate intermediate, and mixing the palmitic acid imidazoline methacrylate intermediate, monobromohexane and second absolute ethanol for reaction to obtain the palmitic acid imidazoline methacrylate quaternary ammonium salt.
  4. 4. The method for preparing the anti-biodegradation corrosion inhibitor as claimed in claim 1, wherein in S1: The mass ratio of deionized water, anhydrous isopropanol, 3- (4-vinylbenzyl) -5, 5-dimethylhydantoin, methacryloxyethyl sulfobetaine, imidazoline palmitate methacrylate quaternary ammonium salt, methacryloxypropyl single-end-capped polydimethylsiloxane, N' -methylenebisacrylamide, ammonium persulfate aqueous solution and triethylene glycol is (40-45): 15-18): 4-4.5): 8-9): 7-8): 1-1.5): 0.1-0.15): 2-3: (10-12.
  5. 5. The method for preparing the anti-biodegradation corrosion inhibitor as claimed in claim 1, wherein in S2: The mass ratio of the cerium nitrate hexahydrate, deionized water, cationic antibacterial microgel dispersion liquid and the amino trimethylene phosphonic acid aqueous solution is (0.4-0.6)/(5-7)/(60-70)/(0.6-0.8).
  6. 6. The method for preparing the anti-biodegradation corrosion inhibitor as claimed in claim 1, wherein, In the S3, the mass ratio of the deionized water to the triethylene glycol to the hydroxyethyl hexahydro-S-triazine to the urotropine to the cetyl pyridine chloride to the 5, 5-dimethylhydantoin is (10-12), the mass ratio of (3-4), the mass ratio of (1.5-2), the mass ratio of (1-1.5) and the mass ratio of (0.5-1); And S4, the mass ratio of the deionized water, the triethylene glycol, the rare earth-phosphonic acid hybrid microgel dispersion liquid, the synergistic inhibitor solution, the fatty alcohol polyoxyethylene ether, the cocamidopropyl betaine and the monoethanolamine aqueous solution is (20-24): (12-15): (20-25): (12-16): (0.8-1.2): (0.5-1): (0.3-0.6).
  7. 7. The method for preparing the anti-biodegradation corrosion inhibitor as claimed in claim 2, wherein in A1: The mass ratio of the 5, 5-dimethylhydantoin, sodium hydroxide, ethanol aqueous solution and 4-vinylbenzyl chloride is (10-12)/(3-4)/(40-50)/(14-16).
  8. 8. A method for preparing an anti-biodegradation corrosion inhibitor as claimed in claim 3, wherein in A2: the mass ratio of the palmitic acid, the diethylenetriamine, the dimethylbenzene, the 2-chloroethanol, the first part of absolute ethyl alcohol, the absolute methylene dichloride, the triethylamine, the methacryloyl chloride and the monobromohexane to the second part of absolute ethyl alcohol is (20-25), the mass ratio of (10-12), the mass ratio of (20-30), the mass ratio of (8-10), the mass ratio of (30-40), the mass ratio of (3-4), the mass ratio of (5-6), the mass ratio of (6-8) and the mass ratio of (30-40) to the mass ratio of (6-40).
  9. 9. An anti-biodegradation corrosion inhibitor, characterized in that it is produced by the production method according to any one of claims 1 to 8.
  10. 10. A slow-release treatment method for high-mineralization sulfur-containing water is characterized by comprising the step of adding the anti-biodegradation corrosion inhibitor according to claim 9 into the high-mineralization sulfur-containing water, wherein the high-mineralization sulfur-containing water is oil field injection water and produced sewage, and the anti-biodegradation corrosion inhibitor is an aqueous dispersion taking water as a continuous phase.

Description

High-mineralization sulfur-containing water slow-release treatment method, anti-biodegradation corrosion inhibitor and preparation method thereof Technical Field The invention belongs to the field of water treatment, and relates to a high-mineralization sulfur-containing water slow-release treatment method, an anti-biodegradation corrosion inhibitor and a preparation method thereof. Background The injected water and the produced water of the oil field generally have high mineralization degree and sulfur-containing characteristics in the reinjection and injection allocation processes, and the interaction of factors such as dissolved salt, suspended solids, hydrogen sulfide, carbon dioxide, sulfate reducing bacteria and the like easily causes uniform corrosion, crevice corrosion and local perforation of the inner walls of gathering pipelines, water injection pipe columns and ground equipment, and causes the problems of scaling, blockage and microbial slime. The prior common fatty acid imidazoline corrosion inhibitor, quaternary ammonium salt bactericide, phosphonate water treatment agent and rare earth salt synergistic formulation in industry mostly are added into the system in a physical blending mode, a large amount of organic components in the formulation can be used as carbon sources and nitrogen sources of iso-oxygen bacteria and sulfate reducing bacteria, rapid biodegradation and adaptability tolerance are easy to occur under the conditions of high mineralization degree, sulfur and complex microbial communities, so that the medicament is fast in failure, the adding frequency is high, the corrosion inhibitor, the bactericide, the scale inhibitor and other medicaments are required to be simultaneously added on site, and compatibility and long-term stability among the medicaments are difficult to be considered. Although there is a high-salt water corrosion inhibition scheme of compounding rare earth salt and organic phosphonate, the solution is still generally remained on the aspect of simple complexation or adsorption, and the overall design of the molecular structure, spatial configuration and biodegradability resistance of the water treatment agent on a microscopic interface is insufficient, so that corrosion control, microorganism control and formula stability are difficult to be considered in the high-mineralization sulfur-containing water body, and therefore, it is necessary to develop a water treatment agent system which is stable in dispersion in the water phase, has structural biodegradation resistance characteristics and is suitable for the high-mineralization sulfur-containing water environment. Disclosure of Invention Aiming at the defects existing in the prior art, the invention aims to provide a high-mineralization sulfur-containing water slow-release treatment method, an anti-biodegradation corrosion inhibitor and a preparation method thereof, wherein a dispersion taking water as a continuous phase is added into oil field injection water and produced water, the water treatment agent consists of cationic microgel containing hydantoin structure, rare earth phosphonic acid hybrid microgel, and synergistic inhibition components such as triazines, formaldehyde condensate, quaternary ammonium salt and the like, and good biological stability and corrosion resistance are maintained under the water environment, so that the actual production requirement is met. To achieve the purpose, the invention adopts the following technical scheme: In a first aspect, the present invention provides a method for preparing an anti-biodegradation type corrosion inhibitor, the method comprising: S1, mixing deionized water and anhydrous isopropanol, blowing nitrogen into a solvent to remove oxygen, sequentially adding 3- (4-vinylbenzyl) -5, 5-dimethylhydantoin, methacryloxyethyl sulfobetaine, imidazoline palmitate methacrylate quaternary ammonium salt and methacryloxypropyl mono-terminated polydimethylsiloxane, then adding N, N' -methylene bisacrylamide and ammonium persulfate aqueous solution to react, and adding triethylene glycol after finishing to obtain cationic antibacterial microgel dispersion; S2, adding cerium nitrate hexahydrate into deionized water to obtain cerium salt solution, dropwise adding the cerium salt solution into cationic antibacterial microgel dispersion liquid, adding amino trimethylene phosphonic acid aqueous solution into the cationic antibacterial microgel dispersion liquid, adjusting pH to 5.5-6.5 by using nitric acid solution, and continuously stirring to obtain rare earth-phosphonic acid hybridization microgel dispersion liquid; S3, mixing deionized water with triethylene glycol, and sequentially adding hydroxyethyl hexahydro-S-triazine, urotropine, cetylpyridinium chloride and 5, 5-dimethyl hydantoin to obtain a synergistic inhibitor solution; S4, mixing deionized water and triethylene glycol, sequentially adding rare earth-phosphonic acid hybrid microgel dispersion liquid and a synergis