Phosphorus-free corrosion and scale inhibitor

A technology of phosphorus-free corrosion and scale inhibitors, applied in the field of water treatment, can solve environmental pollution and other problems, and achieve the effect of reducing molecular weight, low price and obvious effect

Inactive Publication Date: 2010-07-07
0 Cites 10 Cited by

AI-Extracted Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a non-phosphorus corrosion and scale inhibitor to overc...
View more


The invention relates to a phosphorus-free corrosion and scale inhibitor for use in water treatment equipment. The phosphorus-free corrosion and scale inhibitor comprises the following active components in part by weight: 9 to 10 parts of itaconic acid-acrylic acid-acrylate copolymer, 4 to 5 parts of 2-acrylamide-2-methylpropane sulfonic acid-diethylacrylamide polymer, 4.5 to 5.5 parts of polyepoxysuccinic acid and 5 to 6 parts of hydrolyzed plymaleic anhydride. The active components of the phosphorus-free corrosion and scale inhibitor are natural macromolecular compounds which have a natural ring-shaped structure and characteristics of hydrophilic outer cavity and hydrophobic inner cavity and active groups having high valence metal ion chelation are on the outer sides of the natural macromolecular compounds, so that the inhibitor has a certain corrosion and scale inhibiting property; corrosion and scale inhibiting performance of the inhibitor is greatly improved due to the modification by the advanced technique of multi-disciplines, such as the electrochemistry theory, the quantum chemistry theory and the molecular structure design, molecular weight reduction and the introduction of active groups; and in addition, the inhibitor has the advantages of high corrosion and scale inhibiting performance, no toxin nor harmlessness, stable performance, low price, corrosion resistance, rich raw material sources, easy biological degradation in the environment and the like.

Application Domain

Scale removal and water softeningNon-contaminated water treatment

Technology Topic

IonItaconic acid +20


  • Phosphorus-free corrosion and scale inhibitor
  • Phosphorus-free corrosion and scale inhibitor
  • Phosphorus-free corrosion and scale inhibitor


  • Experimental program(1)
  • Effect test(1)

Example Embodiment

[0028] 1. Formula:
[0029] Itaconic acid-acrylic acid-acrylate copolymer 18-20%; 2-acrylamide-2-methylpropanesulfonic acid-diethylacrylamide polymer 8-10%; polyepoxysuccinic acid 9-11%; Hydrolyzed polymaleic anhydride 10-12%; fluorescein 0.5-1.5%; water 45-53%. The above formula is only for reference, and needs to be adjusted appropriately according to the specific water quality of the enterprise during use. For water with high hardness and high concentration ratio, the dosage of medicament can be increased to meet the water quality requirements.
[0030] 2. The operating procedure of compound compounding:
[0031] (1) Pour a certain amount of room temperature water into the kettle. (Heat water to about 26°C in cold weather).
[0032] (2) Add a quantitative amount of 2-acrylamide-2-methyl propane sulfonic acid-diethyl acrylamide polymer, stir to turn on, do not turn off.
[0033] (3) Add quantitative polyepoxysuccinic acid to dissolve and stir for 20 minutes, and control the temperature not to exceed 32°C.
[0034] (4) Add quantitative hydrolyzed polymaleic anhydride and stir.
[0035] (5) Finally, add a quantitative amount of itaconic acid-acrylic acid-acrylate copolymer stock solution and stir for 30 minutes, stop stirring and let stand for 10 minutes.
[0036] The above-mentioned compound formula of the drug should be used at a concentration of 400-600mg/L and run at room temperature for 24 hours. After the actual on-site pre-filming is completed, there is no need to drain water, and it is directly transferred to normal operation. The dosage of the agent can be adjusted by monitoring the concentration of fluorescein in the water.
[0037] The phosphorus-free corrosion and scale inhibitor product of the present invention can be widely used in: oil field water injection, oil refinery circulating cooling water system, thermal power plant circulating cooling water system, chemical plant circulating cooling water system, iron and steel plant circulating cooling water system, turbid circulating water System, nuclear power plant circulating cooling water system, central air conditioning circulating cooling water system, refrigeration and cold storage circulating cooling water system.
[0038] Daily monitoring of drug dosage:
[0039] Analyzing the total phosphorus content in circulating cooling water is one of the main items for daily monitoring of phosphorus-based chemical dosage. The monitoring of the dosage of non-phosphorus medicament is to judge the medicament concentration in the circulating cooling water by analyzing the proportional relationship between the fluorescein content index and the concentration ratio of the circulating cooling water, which is used as the basis for the adjustment of the medicament dosage. That is to say, the determination of the dosage of the non-phosphorus agent is completed by measuring the content of the tracer in the circulating cooling water using the fluorescence method.
[0040] Experimental study on the phosphorus-free corrosion and scale inhibitor of the present invention
[0041] 1. Quality index of BW-201A-A phosphorus-free corrosion and scale inhibitor:
[0042] project
[0043] 2The performance of non-phosphorus water treatment agent compound


no PUM

Description & Claims & Application Information

We can also present the details of the Description, Claims and Application information to help users get a comprehensive understanding of the technical details of the patent, such as background art, summary of invention, brief description of drawings, description of embodiments, and other original content. On the other hand, users can also determine the specific scope of protection of the technology through the list of claims; as well as understand the changes in the life cycle of the technology with the presentation of the patent timeline. Login to view more.

Similar technology patents

Homocysteine aptamer HCy2 and preparation method thereof

InactiveCN104561009ASmall molecular weightconducive to design
Owner:陈燕婷 +2

Enzymatic hydrolysis method for collagen peptide production


Classification and recommendation of technical efficacy words

Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products