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Anti-corrosion and anti-scaling combined agent and preparation method

A technology of combining chemicals, corrosion and scale inhibition, applied in chemical instruments and methods, descaling and water softening, natural water treatment, etc. The effect of time limit, low operating cost and easy promotion

Active Publication Date: 2020-08-28
SCI GREEN SHANDONG ENVIRONMENT TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Enterprise sewage generally has the characteristics of high concentration of organic matter, high chroma, high hardness, and high chloride ions, and contains a large amount of substances that are difficult to degrade and are toxic to microorganisms, and the water quality components are relatively complex.
[0003] Traditional biological treatment methods (such as aerobic treatment, anaerobic treatment) are difficult to achieve the expected treatment effect
Conventional physical and chemical methods are also difficult to meet the water discharge requirements
The complexity of sewage treatment and the high consumption and inefficiency of conventional treatment processes are the most direct reasons why the current enterprise sewage is difficult to treat and discharge up to standard, and it is also the main problem that technicians in the field need to solve

Method used

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  • Anti-corrosion and anti-scaling combined agent and preparation method
  • Anti-corrosion and anti-scaling combined agent and preparation method
  • Anti-corrosion and anti-scaling combined agent and preparation method

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preparation example Construction

[0038] The present invention provides a kind of preparation method of above-mentioned polyether ester compound, comprises as follows:

[0039] 1) Hydroxyethyl methacrylate is used as a raw material, and reacts with ethylene oxide under low-temperature acidic conditions until the infrared spectrum reaches 910cm -1 The peak of the epoxy group disappears, and the first reaction intermediate is obtained.

[0040]

[0041] 2) Add succinic anhydride to the first reaction intermediate obtained in step 1), and react for a certain period of time under medium temperature conditions to obtain polyether ester monomers. In the infrared spectrum, 1200cm -1 The ether group peak appears.

[0042]

[0043] 3) The polyether ester monomer obtained in step 2) is thermally initiated to polymerize with acrylic acid, and the reaction is certain

[0044] The polyether ester compound containing carboxyl and hydrophilic groups with a molecular weight of 20,000-30,000 was obtained.

[0045] ...

specific Embodiment approach

[0065] Sewage zero-discharge corrosion and scale inhibitor composition, its composition is: 15%-20% of the compound of the present invention, 10%-15% of chelating agent, 5%-10% of scale and dispersant, 2%-5% % flocculants, surfactants, etc.

[0066] The compound of the present invention is a polyether ester compound;

[0067] The chelating agent is two or more of ethylenediaminetetraacetic acid, diethylenetriaminepentamethylenephosphonic acid, diethyltriaminepentaacetic acid or ethylenediaminetetramethylenephosphonic acid;

[0068] The scale inhibitor dispersant is one or both of polyaspartic acid, sodium polyacrylate, and hydrolyzed polymaleic anhydride;

[0069] The flocculant is one or both of chitosan or tannin;

[0070] The surfactant is one or both of fatty alcohol polyoxyethylene ether or sorbitan ester.

Embodiment 1

[0072] The pharmaceutical sewage of a chemical factory in Shandong is reused as circulating cooling water. The corrosion and scale inhibitor composition of the present invention is added to the system and mixed according to the following ratio: 20% polyether ester compound, diethylenetriaminepentamethylenephosphonic acid 10%, diethyltriaminepentaacetic acid 5%, polyaspartic acid 7.5%, chitosan 3%, fatty alcohol polyoxyethylene ether 0.5%, water balance.

[0073] In the sewage of this unit, the chlorine ion is 249.9 mg / L, the alkalinity is 2.0 mmol / L, the hardness is 3.0 mmol / L, the calcium ion is 40.08 mg / L, the magnesium ion is 12.25 mg / L, the total iron is 2.66 mg / L, and the total phosphorus is 26.3 mg / L. L, sulfate radical 979.53 mg / L, COD4802 mg / L, NH 3 -N 127.8 mg / L, the water quality is particularly poor, and the cost of wastewater treatment is also high. After entering the zero-sewage system, the equipment was corroded and fouled seriously, and the high-pressure water ...

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Abstract

The invention relates to a polyether ester compound and a preparation method and a corrosion and scale inhibition combined reagent which takes the polyether ester compound as a main ingredient and a preparation method. The polyether ester compound and preparation method and the corrosion and scale inhibition combined reagent and preparation method have the advantages that the polyether ester compound has an unexpected effect of corrosion and scale inhibition reagent, the corrosion and scale inhibition combined reagent containing the novel polyether ester compound is macromolecule organic corrosion inhibitor, and has a scale inhibition performance. The compound contains carboxyl hydrophilic chain sections and alkyl hydrophobic chain sections, a layer of adsorption film is easy to form on the metal surface, hydrophilic ends are adsorbed on the metal surface, hydrophobic ends disperse in sewage, and can prevent ion (C1,SO42) in water from eroding metallic matrix, in addition, because thecompound contains a large number of carboxyl groups, and has functions of chelated calcium and magnesium ions, and is a novel corrosion and scale inhibition reagent. The compound is added into the sewage for circulating cooling water zero drainage, not only a circulation system is protected from corrosion and scaling, so that the sewage is reused, but also microorganism in water body can make thesewage achieve the initial processing effect in the process of recycling.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a corrosion and scale inhibition combined medicament and a preparation method. Background technique [0002] Enterprise sewage generally has the characteristics of high concentration of organic matter, high chroma, high hardness, and high chloride ions, and contains a large number of substances that are difficult to degrade and are toxic to microorganisms, and the water quality components are relatively complex. [0003] Traditional biological treatment methods (such as aerobic treatment and anaerobic treatment) are difficult to achieve the expected treatment effect. Conventional physical and chemical methods are also difficult to meet the water discharge requirements. The complexity of sewage treatment and the high consumption and inefficiency of conventional treatment processes are the most direct reasons why the current enterprise sewage is difficult to treat and disc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F283/06C08F220/06C08G65/26C08G65/332C02F5/10C02F103/02
CPCC02F5/10C02F2103/023C02F2303/08C08F283/065C08G65/2615C08G65/3324C08F220/06
Inventor 田民格曾俊杨庆军高德超张黎平殷树梅刘乐庆
Owner SCI GREEN SHANDONG ENVIRONMENT TECH CO LTD
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