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Polynary itaconic acid copolymer as high efficiency anti-sludging agent and preparing method

A multi-copolymerization, itaconic acid technology, applied in chemical instruments and methods, descaling and water softening, water/sludge/sewage treatment, etc. problem, to achieve the effect of efficient formation and adhesion of scale layer, simple production process and good dispersion effect

Inactive Publication Date: 2004-07-14
ZIBO MINING GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Industrial circulating water initially uses natural polymers such as starch, tannin, lignin, sodium humate, etc. as water quality stabilizers, but it has unstable products, high impurity content, easy to be degraded by microorganisms, poor scale inhibition effect, and a large amount of addition and other shortcomings

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0018] Add 130g of itaconic acid, 36g of sodium propylene sulfonate, and 0.2g of ferrous sulfate into a flask, dissolve in 200mL of distilled water, heat to 90°C, and pass through nitrogen protection; respectively dissolve 8g of sodium persulfate and 10g of sodium sulfite in 60mL of water , keep the temperature at 90°C and add 65g of hydroxypropyl acrylate into the flask at the same time, complete the addition within 3 hours, and then stir for 1 hour; cool to obtain 495mL of dark red polymer solution.

[0019] The conversion rate of the obtained polymer solution is 97.5% (based on itaconic acid), and the unpolymerized residual itaconic acid monomer is 2.5%; the obtained polymer has a density of 1.20g / mL (25°C) and a solid content of 42.3% ; Intrinsic viscosity is 0.0035 (using 1M NaCl as solvent).

[0020] The test of the scale inhibition rate of the obtained polymer (according to Sinopec cooling water analysis and experimental method static scale inhibition calcium carbonate ...

example 2

[0029] Add 104 g of itaconic acid, 12 g of sodium propylene sulfonate, and 0.4 g of ferrous sulfate into a flask, dissolve in 200 mL of distilled water, heat to 80° C., and pass through nitrogen protection. Dissolve 11g of sodium persulfate and 15g of sodium sulfite in 60mL of water, respectively, and add 93.6g of hydroxypropyl acrylate into the flask at the same time while keeping the temperature at 80°C. The addition is completed within 2 hours, and then stirred for 1 hour. Cooling yielded 475 mL of a dark red polymer solution.

[0030] The conversion rate of the obtained polymer solution was 98.7% (based on itaconic acid), and the unpolymerized residual itaconic acid monomer was 1.3%. The obtained polymer had a density of 1.19 g / mL (25° C.), a solid content of 37.6%, and an intrinsic viscosity of 0.0046 (using 1M NaCl as a solvent).

[0031] The scale inhibition rate of the obtained polymer was 60.1%.

example 3

[0033] Add 130 g of itaconic acid and 0.4 g of ferrous sulfate into the flask, dissolve with 200 mL of distilled water, heat to 70° C., and pass through nitrogen protection. Dissolve 12g of sodium persulfate and 10g of sodium sulfite in 60mL of water, respectively, and add 93.6g of methyl acrylate into the flask at the same time while keeping the temperature at 70°C. The addition is completed within 4 hours, and then stirred for 0.5 hours. Cooling yielded 437 mL of a dark red polymer solution.

[0034] The conversion rate of the obtained polymer solution was 99.3% (based on itaconic acid), and the unpolymerized residual itaconic acid monomer was 0.7%. The obtained polymer has a density of 1.22 g / mL (25° C.), a solid content of 39.7%, and an intrinsic viscosity of 0.0071 (using 1M NaCl as a solvent).

[0035] The scale inhibition rate of the obtained polymer was 53.5%.

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Abstract

The present invention features that the polynary copolymer is prepared with itaconic acid, sulfonate and acrylate and through water phase polymeriztion in the presence of initiator system. Relates to itaconic acid, the amount of sulfonate is 0-50 wt%, the acrylate 5-200 wt% and the initiator 0-30 wt%. The preparation process includes mixing itaconic acid and sulfonate to prepare water solution, and adding initiator solution and acrylate homogeneously for copolymerization reaction at 30-100 deg.c. The prepared polynary copolymer solution may be used as anti-sludging agent, scale remover, dispersant, detergent aid, etc. The production process is simple and has no 'three-waste' exhaust.

Description

Technical field [0001] The invention relates to a high-efficiency scale inhibitor and a preparation method thereof, in particular to a preparation method of the high-efficiency scale inhibitor prepared by multi-component copolymerization of itaconic acid. Background technique [0002] Chemical water treatment agents mainly include corrosion inhibitors, scale inhibitors, biocides, flocculants, etc. Most of the fast-growing chemical companies need circulating cooling water. Due to the increasing shortage of fresh water resources, more and more attention has been paid to the treatment chemicals of industrial cooling water. Circulating cooling water requires stable water quality to achieve the dual purpose of preventing equipment corrosion and scaling and saving water. Scaling in industrial water systems seriously affects heat transfer efficiency, increases energy consumption, and accelerates equipment corrosion. Scaling is caused by the crystallization and precipitation of tra...

Claims

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Application Information

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IPC IPC(8): C02F5/10
Inventor 赵立新董风波马长友
Owner ZIBO MINING GRP
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