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Maleic anhydride copolymer scale inhibition dispersing agent and preparation method thereof

The technology of a scale inhibitor and dispersant, maleic anhydride, is applied in the field of scale inhibitor and dispersant and its preparation, maleic anhydride copolymer scale inhibitor and dispersant and its preparation, and achieves easy process control, stable and long-lasting scale inhibitor performance, and raw material cost. low effect

Inactive Publication Date: 2017-04-05
李尧
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the disadvantage of phosphate is that it is easily hydrolyzed to generate orthophosphate, and the divalent metal cation Ca 2+ , Mg 2+ Fouling due to other reactions, especially at high temperature and high pH

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Weigh 15g of maleic anhydride and fully dissolve in deionized water, add 10g of acrylic acid and 4g of ammonium persulfate under stirring, heat up to 50°C, react at constant temperature for 2 hours, and cool to obtain a copolymer of maleic anhydride and acrylic acid; Add 15g of sodium tripolyphosphate to the solution, stir and dissolve at room temperature to obtain the maleic anhydride copolymer scale inhibitor dispersant.

Embodiment 2

[0026] Weigh 18g of maleic anhydride and fully dissolve in deionized water, add 20g of acrylic acid and 4g of potassium persulfate under stirring, heat up to 40°C, react at constant temperature for 4 hours, and cool to obtain a copolymer of maleic anhydride and acrylic acid; in the above copolymer Add 15g of hydroxyethylidene phosphonate into the solution, stir and dissolve at room temperature to obtain the maleic anhydride copolymer scale inhibitor dispersant.

Embodiment 3

[0028] Weigh 20g of maleic anhydride and fully dissolve in deionized water, add 15g of methacrylic acid and 5g of potassium persulfate under stirring, heat up to 70°C, react at constant temperature for 1 hour, and cool to obtain a copolymer of maleic anhydride and methacrylic acid; Add 18g of sodium hexametaphosphate to the above copolymer, stir and dissolve at room temperature to obtain the maleic anhydride copolymer scale inhibitor dispersant.

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PUM

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Abstract

The invention discloses a maleic anhydride copolymer scale inhibition dispersing agent and a preparation method thereof. The scale inhibition dispersing agent comprises, by mass, 15%-20% of maleic anhydride, 10%-20% of unsaturated carboxylic acid, 15%-20% of phosphate, 4%-5% of initiator and the balance deionized water. The preparation method of the scale inhibition dispersing agent comprises the following steps that the maleic anhydride with the mass being 15%-20% is weighed and dissolved into the deionized water, the unsaturated carboxylic acid with the mass being 10%-20% and the initiator with the mass being 4%-5% are added, the temperature is raised to 40 DEG C-70 DEG C, the thermostatic reaction is conducted for one to four hours, and the copolymer of the maleic anhydride and the unsaturated acid is obtained after cooling; and the phosphate with the mass being 15%-20% is added into the copolymer, stirring and dissolving are conducted, and maleic the anhydride copolymer scale inhibition dispersing agent is obtained. The maleic anhydride copolymer scale inhibition dispersing agent has the double scale inhibition effects of stabilizing and dispersing scale substances, and the scale inhibition property is stable and lasting.

Description

technical field [0001] The invention relates to a scale-inhibiting dispersant and a preparation method thereof, in particular to a maleic anhydride copolymer scale-inhibiting dispersant and a preparation method thereof, belonging to the technical field of water treatment. Background technique [0002] Scale inhibitors refer to a class of chemicals that can disperse insoluble inorganic salts in water, prevent or interfere with the precipitation and scaling of insoluble inorganic salts on metal surfaces, and maintain metal equipment with good heat transfer effects. [0003] The commonly used scale inhibitors are inorganic phosphate, organic phosphate and polymer. [0004] Inorganic phosphate, that is, polyphosphate, such as sodium tripolyphosphate, sodium hexametaphosphate, etc., is cheap, although its dispersion ability is poor, but it can distort the crystal lattice, and it is the earliest scale inhibitor used. Organic phosphates, such as aminomethylene phosphate or hydroxy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F5/10C02F5/08C02F5/14
Inventor 李尧
Owner 李尧