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
View PDF4 Cites 0 Cited by
  • 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

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Synthesis method of polyepoxysuccinate
  • Synthesis method of polyepoxysuccinate
  • Synthesis method of polyepoxysuccinate

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0030] Example 1

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

[0032] (2) Then add an alkali solution to the reaction kettle, adjust the pH to 6, and after the temperature in the kettle stabilizes at 55°C, add 1 g 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 add sodium hydroxide solution dropwise at the same time, keeping the pH in the kettle between 4-6 and the temperature at 65-70°C. After the addition of hydrogen peroxide is completed, keep the temperature in the kettle at 65°C and react at pH=6 for 3 hours.

[0034] (4) After the reaction is completed, the temperature of the system drops to 40 degrees, add lye to adjust the PH=9, keep stirring for 1h, then use a vacuum pump for dehydration, the vacuum degree is -0.08-0.09MPa, remove 250g of water;

[00...

Example Embodiment

[0037] Example 2

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

[0039] (2) Then add alkali solution to the reaction kettle, adjust the pH to 6, and after the temperature in the kettle stabilizes at 55°C, add 2 g 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 add sodium hydroxide solution dropwise at the same time to keep the pH in the kettle between 4-6 and the temperature at 65-70°C. After the addition of hydrogen peroxide is completed, keep the temperature in the kettle at 65°C and react at pH=6 for 3 hours.

[0041] (4) After the reaction is completed, the temperature of the system drops to 40 degrees, add lye to adjust the PH=9, keep stirring for 1h, and then use a vacuum pump for dehydration, the vacuum degree is -0.08MPa, and 400g water is removed;

[00...

Example Embodiment

[0043] Example 3

[0044] (1) Add 260g of water to the reaction kettle, then add 150g of maleic anhydride, and 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 6, and after the temperature in the kettle stabilizes at 55°C, add 1.5 g 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 add sodium hydroxide solution dropwise at the same time to keep the pH in the kettle between 4-6 and the temperature at 65-70°C. After the addition of hydrogen peroxide is completed, keep the temperature in the kettle at 65°C and react at pH=6 for 3 hours.

[0047] (4) After the reaction is completed, the temperature of the system drops to 40 degrees, add lye to adjust the PH=9, keep stirring for 1h, then use a vacuum pump for dehydration, the vacuum degree is -0.09MPa, remove 450g of water;

[0048] (5) After t...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
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
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap