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Synthesis method of polyepoxysuccinate

A technology of polyepoxysuccinate and synthesis method, which is applied in the field of synthesis of polyepoxysuccinate, can solve problems such as poor scale inhibition performance, achieve excellent scale inhibition performance, simple operation, and do not pollute the environment

Pending Publication Date: 2020-06-16
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, most of the existing polyepoxysuccinic acid has the disadvantage of poor scale inhibition performance, so the development of a polyepoxysuccinic acid with good scale inhibition performance is very in line with the market demand

Method used

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  • Synthesis method of polyepoxysuccinate
  • Synthesis method of polyepoxysuccinate
  • Synthesis method of polyepoxysuccinate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Add 300g of water to the reactor, then add 200g of maleic anhydride, then heat to 40°C and stir to completely dissolve the maleic anhydride.

[0032] (2) Then add alkali solution to the reaction kettle, adjust the pH to be 6, after the temperature in the kettle is stabilized at 55°C, add 1g of ruthenium catalyst;

[0033] (3) When the temperature in the kettle stabilizes to 65°C, add 300g of hydrogen peroxide to the reaction kettle, and at the same time add dropwise sodium hydroxide solution to keep the pH in the kettle between 4-6 and the temperature at 65-70°C. After the hydrogen peroxide was added dropwise, keep the temperature in the kettle at 65°C, pH = 6, and react for 3 hours.

[0034] (4) After the reaction is completed, the temperature of the system is reduced to 40 degrees, and the lye is added to adjust the pH=9, and kept stirring for 1 hour, and then dehydrated with a vacuum pump, the vacuum degree is -0.08-0.09MPa, and 250g of water is removed;

[0035...

Embodiment 2

[0038] (1) Add 200g of water to the reaction kettle, then add 100g of maleic anhydride, then heat to 40°C and stir to completely dissolve the maleic anhydride.

[0039] (2) Add alkaline solution to the reaction kettle then, adjust the pH to be 6, after the temperature in the kettle is stabilized at 55°C, add 2g of ruthenium catalyst;

[0040] (3) When the temperature in the kettle stabilizes to 65°C, add 200g of hydrogen peroxide to the reaction kettle, and dropwise add sodium hydroxide solution at the same time to keep the pH in the kettle between 4-6 and the temperature at 65-70°C. After the hydrogen peroxide was added dropwise, keep the temperature in the kettle at 65°C, pH = 6, and react for 3 hours.

[0041] (4) After the reaction is completed, the temperature of the system is reduced to 40 degrees, and the lye is added to adjust the PH=9, and kept stirring for 1 hour, and then dehydrated with a vacuum pump, the vacuum degree is -0.08MPa, and 400g of water is removed;

...

Embodiment 3

[0044] (1) Add 260g of water to the reactor, then add 150g of maleic anhydride, then heat to 40°C and stir to completely dissolve the maleic anhydride.

[0045] (2) Then add alkali solution to the reaction kettle, adjust the pH to be 6, after the temperature in the kettle is stabilized at 55°C, add 1.5g of ruthenium catalyst;

[0046] (3) When the temperature in the kettle stabilizes to 65°C, add 200g of hydrogen peroxide to the reaction kettle, and dropwise add sodium hydroxide solution at the same time to keep the pH in the kettle between 4-6 and the temperature at 65-70°C. After the hydrogen peroxide was added dropwise, keep the temperature in the kettle at 65°C, pH = 6, and react for 3 hours.

[0047] (4) After the reaction is completed, the temperature of the system is reduced to 40 degrees, and the lye is added to adjust the pH=9, and kept stirring for 1 hour, and then dehydrated with a vacuum pump, the vacuum degree is -0.09MPa, and 450g of water is removed;

[0048] (...

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Abstract

A synthesis method of polyepoxysuccinate belongs to the field of organic synthesis. The invention discloses a synthesis method of polyepoxysuccinate. The preparation method comprises the following steps: firstly hydrolyzing maleic anhydride as a raw material with water and alkali to generate maleate, then carrying out epoxidation reaction with a peroxide catalyst to generate epoxysuccinic acid, and then polymerizing the epoxysuccinic acid into polyepoxysuccinic acid under the action of a basic catalyst. After epoxysuccinic acid is generated, dehydration is performed under certain temperature and vacuum conditions, the concentration is increased, the polymerization degree of epoxysuccinic acid is increased, and the scale inhibition performance is improved. The synthesis method of the polyepoxysuccinate has the advantages of being simple to operate, convenient to operate and free of environmental pollution, and the polyepoxysuccinate prepared by the method has excellent scale inhibitionperformance.

Description

technical field [0001] The invention relates to the technical field of chemical synthesis, in particular to a synthesis method of polyepoxysuccinate. Background technique [0002] Polyepoxysuccinic acid (PESA) is internationally recognized as a new type of synthetic polymer green water treatment agent that is phosphorus-free, non-nitrogen, and has good biodegradability. Studies have found that PESA has good scale inhibition, corrosion inhibition, synergy, heavy metal extraction, dispersion, sterilization and other properties, and has a strong chelation effect on calcium, magnesium, iron and other multivalent metal cations. It can be used for circulating cooling water, Scale and corrosion inhibition treatment of boiler water, oil field water injection, pickling wastewater and other high-alkali, high-solid and strongly acidic water quality, as well as scale inhibitors, corrosion inhibitors, and dispersants required for seawater desalination, membrane separation, reverse osmosi...

Claims

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Application Information

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IPC IPC(8): C08G65/22C02F5/10
CPCC08G65/22C02F5/10Y02P20/584
Inventor 胡向平陈松
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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