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Preparation method and application method of multifunctional polyepoxysuccinic acid derivative scale inhibitor

A technology of polyepoxysuccinic acid and sodium epoxysuccinate, applied in chemical instruments and methods, descaling and water softening, water/sludge/sewage treatment, etc. The problem of high cost of use of scale agents can improve the scale inhibition rate, good scale inhibition and increase the dispersion effect.

Inactive Publication Date: 2014-10-01
NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems of high use cost, low scale inhibition efficiency and harmfulness to the environment of the existing scale inhibitors, the present invention provides a kind of antiscalant with good solubility in water, non-toxic and harmless to the environment, biodegradable, and high scale inhibition efficiency. , the synthesis method of multifunctional polyepoxysuccinic acid derivative scale inhibitor with low production cost, and the second is to provide an application method of polyepoxysuccinic acid derivative scale inhibitor, which increases its application range

Method used

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  • Preparation method and application method of multifunctional polyepoxysuccinic acid derivative scale inhibitor
  • Preparation method and application method of multifunctional polyepoxysuccinic acid derivative scale inhibitor
  • Preparation method and application method of multifunctional polyepoxysuccinic acid derivative scale inhibitor

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Experimental program
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Effect test

Embodiment 1

[0021] A. Cyclization reaction and purification of cyclization products

[0022] aAdd 15g of NaOH and 33ml of water into the three-necked flask, put the three-necked flask into a magnetic stirring water bath, fully dissolve under magnetic stirring, then add 19.6g of maleic anhydride, while the temperature of the water bath is raised to 55°C. After the water bath was heated to 55°C, the catalyst 1.2gNa was added 2 WO 4 . Finally, raise the temperature of the water bath to 70°C. After the temperature stabilizes, use a separatory funnel to evenly add 24ml of hydrogen peroxide dropwise within 35 minutes. Mixed crude products were obtained after 1.5 hours of reaction.

[0023] b product purification: the mixed crude product of step a is heated with an electric heating mantle, and vacuumized simultaneously for distillation under reduced pressure. When the remaining liquid after evaporation is 1 / 2 of the volume of the original solution, stop the vacuum distillation. Pour the sol...

Embodiment 2

[0029] A. Cyclization reaction and purification of cyclization products

[0030] a Add 13g of NaOH and 35ml of water into the three-necked flask, put the three-necked flask into a magnetic stirring water bath, fully dissolve under magnetic stirring, add 18g of maleic anhydride, and raise the temperature of the water bath to 52°C. After the temperature of the water bath was raised to 52°C, the catalyst 1gNa was added 2 WO 4 . Finally, raise the temperature of the water bath to 65°C. After the temperature is stable, use a separatory funnel to evenly add 20ml of hydrogen peroxide dropwise within 30 minutes. At this point, 1:1 hydrochloric acid solution was used to adjust the pH to 6-7, and the mixed crude product was obtained after 1 hour of reaction.

[0031] b product purification: the mixed crude product of step a is heated with an electric heating mantle, and vacuumized simultaneously for distillation under reduced pressure. When the remaining liquid after evaporation is ...

Embodiment 3

[0037] A. Cyclization reaction and purification of cyclization products

[0038] a Add 18g of NaOH and 38ml into the three-necked flask, put the three-necked flask into a magnetic stirring water bath, fully dissolve under magnetic stirring, add 20g of maleic anhydride, and raise the temperature of the water bath to 58°C. After the temperature of the water bath was raised to 58°C, 1.5g of Na2WO4 catalyst was added, and then the temperature of the water bath was raised to 75°C. After the temperature stabilized, 26ml of hydrogen peroxide was evenly added dropwise within 40min with a separatory funnel. At this point, 1:1 hydrochloric acid solution was used to adjust the pH to 7, and the mixed crude product was obtained after 2 hours of reaction.

[0039]b product purification: the mixed crude product of step a is heated with an electric heating mantle, and vacuumized simultaneously for distillation under reduced pressure. When the remaining liquid after evaporation is 1 / 2 of the ...

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Abstract

The invention relates to the preparation and application field of a multifunctional polyepoxysuccinic acid derivative scale inhibitor and in particular relates to a preparation method and application method of the multifunctional polyepoxysuccinic acid derivative scale inhibitor which has good biodegradability and water solubility and can be applied to a water treatment agent. The preparation method comprises the following steps: carrying out cyclization reaction and purifying a cyclization product, preparing a polyepoxysuccinic acid product, and preparing the multifunctional polyepoxysuccinic acid derivative. The multifunctional polyepoxysuccinic acid derivative scale inhibitor is applied when the pH value is 6.0-10.0, blocking calcium carbonate scale inhibition rate is in a range of 85%-90% and blocking calcium phosphate scale inhibition rate is in a range of 40%-80%. By utilizing the multifunctional polyepoxysuccinic acid derivative scale inhibitor, the multifunctional scale inhibition capacity of original polyepoxysuccinic acid is improved and purpose of improving the scale inhibition efficiency is finally achieved. Only a small molecule material is added into synthesis to achieve the purpose of increasing the multifunctional scale inhibition capacity of the polyepoxysuccinic acid without changing other process conditions.

Description

technical field [0001] The invention relates to the preparation technology of multifunctional polyepoxysuccinic acid derivative scale inhibitor. In particular, it relates to the preparation and application method of a multifunctional polyepoxysuccinic acid derivative scale inhibitor used in water treatment agents. Background technique [0002] Polyepoxysuccinic acid (PESA) is a polymer with carboxylic acid side chains, which is not only biodegradable, but also has the functions of chelation and dispersion. Due to the molecular structure of polyepoxysuccinic acid, PESA is easy to mix with Adsorption or combination of metal ions has the effect of preventing scale formation, and can be used to prevent CaCO in water treatment 3 Formation of scale, and can also chelate with metal ions, used for purification of industrial sewage, is a kind of environmentally friendly water quality stabilizer that represents the development direction of scale and corrosion inhibitors. Therefore, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/334C08G65/22C02F5/10
Inventor 梁英华柳鑫华丁云飞王文静佟欣佳芮玉兰孙彩云吴卫华
Owner NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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