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High-temperature water scale inhibitor as well as preparation method and application thereof

A technology of scale inhibitor and high-temperature water, which is applied in chemical instruments and methods, descaling and water softening, water/sludge/sewage treatment, etc., and can solve problems such as adverse effects and decreased stability of metal carboxylates

Inactive Publication Date: 2013-05-01
LIAONING UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the stability of the metal carboxylate produced by it decreases with time, which has a negative impact on high temperature water quality

Method used

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  • High-temperature water scale inhibitor as well as preparation method and application thereof
  • High-temperature water scale inhibitor as well as preparation method and application thereof
  • High-temperature water scale inhibitor as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Embodiment 1: Production of high temperature water scale inhibitor X

[0055]A four-port glass reactor equipped with a thermometer, a stirrer, a dropping funnel and a reflux condenser, into which 25mL of distilled water, 50g of The unsaturated alcohol and 16g of maleic acid produced by the addition reaction raised the temperature of the reactor to 70°C. Add 1.0 g of sodium persulfate dissolved in 15 mL of distilled aqueous solution dropwise into the reactor within 240 min. The temperature in the reactor was maintained at 70° C. for 60 minutes to complete the polymerization reaction, and a polymer was obtained, which was an aqueous solution of high-temperature water scale inhibitor (I-1). The weight-average molecular weight of the polymer was 35,000.

Embodiment 2

[0056] Embodiment 2: Production of antiscalant Y for high temperature water

[0057] A four-port glass reactor equipped with a thermometer, a stirrer, a dropping funnel and a reflux condenser, into which 130mL of ion-exchanged water, 50g of - unsaturated alcohol produced by alcohol addition reaction, 20.0 g of maleic acid, the temperature of the reactor was raised to 65°C. Within 200 min, 100 mL of ion-exchanged aqueous solution in which 1.0 g of sodium persulfate was dissolved was dropped into the reactor. The temperature in the reactor was maintained at 65° C. for 60 minutes to complete the polymerization reaction, and a polymer was obtained, which was an aqueous solution of the high-temperature water scale inhibitor (I-2). The weight-average molecular weight of the polymer was 24,600.

Embodiment 3

[0058] Embodiment 3: the production of cement dispersant Z

[0059] A four-port glass reactor equipped with a thermometer, a stirrer, a dropping funnel and a reflux condenser, in which 160g of ion-exchanged water, 50g of ethylene oxide and 3-methyl-3-butene-1 - unsaturated alcohol produced by alcohol addition reaction, 15.0 g of maleic acid, the temperature of the reactor was raised to 60°C. Within 180 min, 100 mL of ion-exchanged aqueous solution in which 1.0 g of sodium persulfate was dissolved was dropped into the reactor. The temperature in the reactor was maintained at 60° C. for 60 minutes to complete the polymerization reaction, and a polymer was obtained, which was an aqueous solution of the high-temperature water scale inhibitor (I-3). The weight-average molecular weight of the polymer was 18,400.

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Abstract

The invention provides a scale inhibitor of water treatment chemicals and a production method thereof. The scale inhibitor has prominent scale inhibition performance under high-temperature heating conditions, and the scale inhibition capacity does not decline with time in a long time. The scale inhibitor can be a polymer (A), which comprises polyalkylene glycol ether as a polymerizable monomer (I) (represented by the following general formula 1), maleic acid as a polymerizable monomer (II) (represented by the following general formula 2), and 0-49% by weight of other polymerizable monomers (III), wherein the ratio of (I) to (II) to (III) is equal to (50-99%): (50-1%): (0-49%). According to the invention, when the polymer (A) is combined with a copolymer (A-1) or (A-2), the scale inhibition performance can be improved to a certain extent.

Description

Background technique [0001] The invention relates to a production method and application of water treatment chemicals. Specifically, the present invention relates to a specific scale inhibitor in water chemicals and its production method. This scale inhibitor can form a complex with high-valent metal ions in water. This complex can be used at 100°C and It exists stably under the above temperature conditions, so that the water under the high temperature heating condition has a high stable property, and the obtained stable property will not decline with time in a long period of time. [0002] The stability of water quality under high-temperature heating conditions is urgently needed by the high-temperature steam industry, especially in thermal power generation, petroleum thermal recovery and other industries that require high-dry superheated steam. It has always been an important issue. There have been many proposals to use polycarboxylic acid-based scale inhibitors because the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F5/10C02F5/12
Inventor 吴宪龙张震斌
Owner LIAONING UNIVERSITY OF TECHNOLOGY
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