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Scale-inhibiting dispersant for industry recirculated cooling water process and preparation thereof

A scale inhibitor and dispersant, the technology of circulating cooling water, applied in water/sludge/sewage treatment, chemical instruments and methods, scale removal and water softening, etc. problem, to achieve the effect of strong scale inhibition and dispersing ability, good effect and high content of active ingredients

Inactive Publication Date: 2008-10-08
HEBEI ENERGY RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As far as the prior art is concerned, unsaturated carboxylic acid esters can modify unsaturated carboxylic acid copolymers to improve the scale inhibition and dispersibility of polymers, but monobasic unsaturated carboxylic acid esters such as acrylates are particularly poor in water solubility. Therefore, the amount of unsaturated carboxylic acid ester in the copolymer introduced with unsaturated carboxylic acid ester is very small, which affects the improvement of the scale inhibition and dispersion ability of the copolymer

Method used

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  • Scale-inhibiting dispersant for industry recirculated cooling water process and preparation thereof
  • Scale-inhibiting dispersant for industry recirculated cooling water process and preparation thereof
  • Scale-inhibiting dispersant for industry recirculated cooling water process and preparation thereof

Examples

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Embodiment 1

[0017] Example 1: Take maleic anhydride and monohydric alcohol C with carbon number≤3 according to the molar ratio of 1:1 n h 2n+1 Mix OH with OH, carry out esterification at 80°C, and generate maleic acid monoester after esterification for 1 hour; take maleic anhydride, the above-mentioned maleic acid which can be hydrolyzed to generate equimolar maleic acid according to the monomer molar ratio of 2:1:1 Copolymerization of acid monoester and acrylic acid, using ammonium ferrous sulfate and 30% hydrogen peroxide to initiate catalysis, the mass ratio of hydrogen peroxide and maleic anhydride is 1:2, and the amount of ammonium ferrous sulfate is 0.5% of the mass of maleic anhydride ; Molecular weight regulator isopropanol is added, and the mass ratio of isopropanol, water and maleic anhydride is 1:1.2:4. The operation method of the above-mentioned copolymerization step is as follows: add maleic anhydride, maleic acid monoester, ferrous ammonium sulfate, isopropanol and water wh...

Embodiment 2

[0018] Embodiment 2: Take maleic anhydride and monohydric alcohol C with carbon number≤3 according to the molar ratio of 1:1 n h 2n+1 OH mixed, esterified at 100°C, maleic acid monoester was formed after esterification for 1 hour; according to the monomer molar ratio of 2:1.25:0.75, the maleic anhydride, the above-mentioned maleic acid which can be hydrolyzed to generate equimolar maleic acid Copolymerization of acid monoester and acrylic acid, using ammonium ferrous sulfate and 30% hydrogen peroxide to initiate catalysis, the mass ratio of hydrogen peroxide and maleic anhydride is 1:2, and the amount of ammonium ferrous sulfate is 0.5% of the mass of maleic anhydride ; Molecular weight regulator isopropanol is added, and the mass ratio of isopropanol, water and maleic anhydride is 1:1.2:4. The operation method of the above-mentioned copolymerization step is as follows: add maleic anhydride, maleic acid monoester, ferrous ammonium sulfate, isopropanol and water which can be h...

Embodiment 3

[0019] Embodiment 3: Take maleic anhydride and monohydric alcohol C with carbon number≤3 according to the molar ratio of 1:1 n h 2n+1 OH mixed, esterified at 110°C, maleic acid monoester was formed after esterification for 1 hour; according to the monomer molar ratio of 2:1.5:0.5, the maleic anhydride, the above-mentioned maleic acid which can be hydrolyzed to generate equimolar maleic acid Copolymerization of acid monoester and acrylic acid, using ammonium ferrous sulfate and 30% hydrogen peroxide to initiate catalysis, the mass ratio of hydrogen peroxide and maleic anhydride is 1:2, and the amount of ammonium ferrous sulfate is 0.5% of the mass of maleic anhydride ; Molecular weight regulator isopropanol is added, and the mass ratio of isopropanol, water and maleic anhydride is 1:1.2:4. The operation method of the above-mentioned copolymerization step is as follows: add maleic anhydride, maleic acid monoester, ferrous ammonium sulfate, isopropanol and water which can be hyd...

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Abstract

A dirt dispersion agent for the industrial circulating cooling water treatment and a method for the production thereof are disclosed, the invention belongs to the chemical product technique field and is used for solving the problem of improving the scale inhibition and dispersion capabilities. The dirt dispersion agent has the technical proposal that the agent is copolymerized by three monomers of maleic acid, maleic acid monoester and acrylic acid, and the mole ratio of the three monomers of maleic acid, maleic acid monoester and acrylic acid is 2: 1-1.5: 0.5-1. The method of preparation of the invention comprises steps of esterification, copolymerization, etc.. The invention synthesizes a maleic acid-maleic acid monoester-acrylic acid terpolymer based on a maleic acid-acrylic acid copolymer of the prior art, the terpolymer has advantages of high effective constituent content and strong scale inhibition and dispersion capabilities as the dirt dispersion agent, and can effectively chelate Zn2+, and the terpolymer is in a dissolved state under rather high alkalinity, and can be used as the dirt dispersion agent of calcium carbonate and calcium sulphate in the industrial circulating cooling water treatment, and the scale inhibition rate can reach over 95 percent.

Description

technical field [0001] The invention relates to a scale inhibitor and dispersant for industrial circulating cooling water treatment and a preparation method thereof, in particular to a scale inhibitor and dispersant for calcium carbonate and calcium sulfate in industrial circulating cooling water treatment and a preparation method thereof, which belongs to chemical product technology field. Background technique [0002] Under the current situation of increasingly scarce water resources, the recycling of industrial cooling water can greatly reduce water consumption and play an important role in energy saving and consumption reduction for enterprises. However, in order to prevent scaling and pipeline corrosion during the recycling process of industrial cooling water, water needs to be treated, which is industrial circulating cooling water treatment. At present, the main component of industrial circulating cooling water treatment agent is scale inhibitor dispersant, which is m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F5/10C08F222/02C08F2/38
Inventor 张彦河刘振法杨维之
Owner HEBEI ENERGY RES INST
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