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Multi-copolymer and preparation method and use thereof

A multi-copolymer and copolymerization technology, which is used in chemical instruments and methods, descaling and water softening, water/sludge/sewage treatment, etc. , the problem of high impurity content, to achieve the effect of improving scale inhibition and dispersion performance, narrow molecular weight distribution and low viscosity

Active Publication Date: 2016-05-04
CHENGDU QIDA WATER TREATMENT ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Organic phosphine compounds, such as ATMP, HEDP, PBTCA, etc., although they have good chemical stability, temperature resistance, synergy and chelating Ca 2+ , Mg 2+ , Zn 2+ , Fe 2+ and other metal ions and strong ability to inhibit calcium carbonate scale, but because organic phosphine can make water eutrophication, it is not conducive to environmental protection
Natural polymers, such as lignin, tannin, sodium humate, etc., have a negative effect on Ca 2+ , Mg 2+ Such salt scale crystal growth has a certain inhibitory effect, but natural polymers have the disadvantages of instability, easy decomposition, large input amount, high impurity content, high temperature and easy decomposition, and the anti-scaling and dispersion effects are not as good as synthetic polymers. less direct use

Method used

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  • Multi-copolymer and preparation method and use thereof
  • Multi-copolymer and preparation method and use thereof
  • Multi-copolymer and preparation method and use thereof

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0037] Component A: 2 parts of hydrogen peroxide (hydrogen peroxide with a content of about 27%), 2 parts of ammonium persulfate, prepared as a 40% aqueous solution;

[0038] Component B: 15 parts of acrylic acid, 5 parts of aconitic acid, 2 parts of methyl methacrylate, 2 parts of hydroxyethyl acrylate, and 2 parts of hydroxypropyl acrylate, prepared as a 59% aqueous solution;

[0039] Component C: 0.5 parts of vitamin C, 0.5 parts of sodium bisulfite, 2 parts of isopropanol, 2 parts of thioglycolic acid, 0.025 parts of ferric ammonium sulfate, 0.025 parts of copper sulfate, 3 parts of sodium vinyl sulfonate, allyl 2 parts of sodium sulfonate, 2 parts of sodium methacrylate, 34 parts of deionized water;

[0040] According to the above-mentioned C component batching method, in the reactor equipped with a reflux condenser and a stirring device, turn on the stirring device, prepare C component, and pass steam to raise the temperature after preparation. When the temperature rises ...

example 2

[0042] Component A: 2 parts of hydrogen peroxide (about 27% hydrogen peroxide), 2 parts of potassium persulfate, prepared as a 40% aqueous solution;

[0043] Component B: 15 parts of acrylic acid, 5 parts of itaconic acid, 5 parts of aconitic acid, 1 part of methyl acrylate, 1 part of vinyl acetate, 2 parts of hydroxypropyl methacrylate, prepared as a 54% aqueous solution;

[0044] Component C: 0.5 parts of ferrous sulfate, 0.5 parts of sodium hypophosphite, 2 parts of n-propanol, 2 parts of thioglycolic acid, 2 parts of mercaptopropanol, 0.05 parts of iron sulfate, 0.05 parts of copper sulfate, 2 parts of sodium allyl sulfonate 2 parts, 2 parts of 2-acrylamide-2-methylpropanesulfonic acid, 25 parts of deionized water;

[0045] According to the above-mentioned C component batching method, in the reactor equipped with a reflux condenser and a stirring device, turn on the stirring device, prepare C component, and pass steam to raise the temperature after preparation. When the t...

example 3

[0047] Component A: 2 parts of potassium persulfate, 2 parts of ammonium persulfate, prepared as a 50% aqueous solution;

[0048] Component B: 5 parts of acrylic acid, 15 parts of methacrylic acid, 5 parts of aconitic acid, 5 parts of itaconic acid, 1 part of methyl methacrylate, 1 part of hydroxyethyl acrylate, prepared as a 50% aqueous solution;

[0049] Component C: 0.5 parts of sodium thiosulfate, 0.5 parts of diethylamine, 2 parts of n-propanol, 2 parts of thioglycolic acid, 2 parts of mercaptopropanol, 2 parts of mercaptoethanol, 0.05 parts of ferric ammonium sulfate, 0.05 parts of iron citrate , 0.05 parts of copper sulfate, 1 part of sodium methacrylate, 1 part of 2-acrylamide-2-methylpropanesulfonic acid, 1 part of styrenesulfonic acid, 16 parts of deionized water;

[0050] According to the above-mentioned C component batching method, in the reactor equipped with a reflux condenser and a stirring device, turn on the stirring device, prepare C component, and pass steam...

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Abstract

The present invention belongs to the technical field of water treatment, relates to a multi-copolymer used for recycled water for industry and a preparation method and use thereof, particularly use as a scale and corrosion inhibitor, and especially as a low-phosphorus environmental-friendly scale and corrosion inhibitor. The multi-copolymer is obtained by copolymerization of a carboxyl-group-containing unsaturated organic monomer, an ester-group-containing unsaturated organic monomer and a sulfonic-acid group-containing unsaturated organic monomer, and the limiting viscosity number of the multi-copolymer is 0.035-0.055dL / g. The multi-copolymer has scale inhibition, dispersion, corrosion resistance, temperature resistance and other properties, can be used as a scale inhibition dispersant, especially as the low-phosphorus environmental-friendly scale and corrosion inhibitor, and can be used in circulating cooling water systems, oil field water injection systems, seawater desalination and other fields.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and relates to a multi-component copolymer used for industrial circulating water and its preparation method and application, specifically as a scale and corrosion inhibitor, especially as a low-phosphorus, environment-friendly, corrosion and scale inhibitor. Background technique [0002] The development of industrialization requires more and more water, especially in thermal power, chemical, energy and other enterprises with huge water consumption. In order to achieve the purpose of saving energy, reducing emissions, and reducing energy consumption, these industrial enterprises generally adopt circulating cooling water systems; however, after the water has been recycled for many times, the salts and other substances in the water will be concentrated, resulting in scaling and corrosion . In order to inhibit scaling and reduce corrosion, and maintain stable operation of production, it is n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/06C08F222/02C08F222/06C08F220/14C08F220/28C08F228/02C08F220/58C08F212/14C08F218/08C08F2/10C08F2/38C08F4/40C02F5/10C02F5/12C02F5/14C02F103/02C02F103/08C02F103/10
CPCC02F5/10C02F5/12C02F5/145C08F220/06C08F222/06C02F2103/023C02F2103/10C02F2103/08C08F222/02C08F220/14C08F218/08C08F220/281C08F228/02C08F220/585C08F212/14
Inventor 李雪波林坤华
Owner CHENGDU QIDA WATER TREATMENT ENG
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