Silica scale inhibitor, preparation method and application

A technology of scale inhibitor and silica scale, which is applied in the direction of scale removal and water softening, chemical instruments and methods, natural water treatment, etc., can solve the problems of high production cost and complicated preparation process, and achieve high utilization rate and simple synthesis process , The effect of reducing product cost

Inactive Publication Date: 2019-03-08
SHANDONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The invention provides a silica scale inhibitor and its preparation method and application, which solves the problems of complex preparation process and high production cost in the prior art, and the prepared silica scale inhibitor can be used to solve many cur

Method used

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  • Silica scale inhibitor, preparation method and application
  • Silica scale inhibitor, preparation method and application
  • Silica scale inhibitor, preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Add 90 parts of acrylic acid, 10 parts of N-tert-butylacrylamide and 180 parts of deionized water into the reaction kettle in sequence, stir and raise the temperature to 70±2°C, and start to add sodium persulfate and sodium hypophosphite dropwise, among which sodium persulfate The weight ratio of sodium hypophosphite and comonomer is 1:55, and the weight ratio of sodium hypophosphite and comonomer is 1:18. At the same time, sodium hydroxide is added dropwise to control the pH of the solution between 3 and 4, and the temperature is kept at 70°C for 65 minutes. Finally, the silica scale antiscalant is obtained, the viscosity average molecular weight is 4830, and the molecular weight distribution is 3.1~3.8.

Embodiment 2

[0026] Add 80 parts of acrylic acid, 20 parts of N-tert-butylacrylamide and 160 parts of deionized water into the reaction kettle in sequence, stir and raise the temperature to 70±2°C, start to add sodium persulfate and sodium hypophosphite dropwise, among which sodium persulfate The weight ratio of sodium hypophosphite and comonomer is 1:54, and the weight ratio of sodium hypophosphite and comonomer is 1:17. At the same time, sodium hydroxide is added dropwise to control the pH of the solution between 3 and 4, and the temperature is kept at 68°C for 60 minutes. Finally, the silica scale antiscalant was obtained, with a viscosity-average molecular weight of 5347 and a molecular weight distribution of 3.3-4.0.

Embodiment 3

[0028] Add 70 parts of acrylic acid, 30 parts of N-tert-butylacrylamide and 140 parts of deionized water into the reaction kettle in sequence, stir and raise the temperature to 70±2°C, and start to add sodium persulfate and sodium hypophosphite dropwise, among which sodium persulfate The weight ratio of sodium hypophosphite and comonomer is 1:58, and the weight ratio of sodium hypophosphite and comonomer is 1:17. At the same time, sodium hydroxide is added dropwise to control the pH of the solution between 3 and 4, and the temperature is kept at 70°C for 60 minutes. Finally, the silica scale antiscalant is obtained, the viscosity average molecular weight is 5182, and the molecular weight distribution is 3.1~3.7.

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Abstract

The invention discloses a silica scale inhibitor, and a preparation method and application thereof. The silica scale inhibitor is formed by performing copolymerization on crylic acid, 2-acrylamido-2-methylpropane sulfonic acid and N-tert-butyl acrylamide, simple in preparation technology and low in production cost, and has an excellent inhibition effect; moreover, the silica scale inhibitor has notoxic and/or side effect on organism, is safe to use, can meet the requirements on silica scale inhibition in the field of industrial circulating cooling water treatment, and is particularly applicable to inhibition of colloid silica scale or silicate scale in a circulating systems, with high silicon content, in raw water or circulating water.

Description

technical field [0001] The invention belongs to the field of industrial water treatment, and in particular relates to a silica scale inhibitor, a preparation method and an application. Background technique [0002] Silicon is one of the most abundant elements on the earth, and it is also the most common colloidal substance in the water environment. The solubility of silicon in water is usually 150-180 mg L -1 between. In the industrial circulating cooling water system, in order to reduce the water replenishment and sewage discharge, the concentration ratio of the circulating water is usually higher. However, with the increase of the concentration ratio, the water with high silicon content often forms silicon scale and deposits on the surface of the equipment during operation, resulting in a decrease in the heat transfer efficiency of the equipment and blockage of the system pipeline. Once the silica scale is formed, it is difficult to remove, and the highly corrosive NH ...

Claims

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Application Information

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IPC IPC(8): C08F220/06C08F220/58C08F220/54C02F5/12C02F103/02
CPCC02F5/12C02F2103/023C08F220/06C08F220/585C08F220/54
Inventor 高灿柱邱同同杜淑娟蔡少康程终发赵开源王宁宁
Owner SHANDONG UNIV
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