Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Epoxysuccinic acid-itaconic acid copolymerized green scale and corrosion inhibitor and preparation method therefor

A technology of epoxy succinic acid and scale and corrosion inhibitors, which is applied in the preparation of carboxylate, chemical instruments and methods, and the preparation of organic compounds. Scale dispersion performance and mild reaction conditions

Active Publication Date: 2016-03-30
成都纳海川环境工程有限公司
View PDF5 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its scale inhibition performance still has a certain gap compared with phosphonic acid scale inhibitors. At present, the compounding of polyepoxysuccinic acid and other agents or the copolymerization of epoxysuccinic acid and other monomers are often used to improve its scale inhibition. Corrosion inhibition performance

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
  • Epoxysuccinic acid-itaconic acid copolymerized green scale and corrosion inhibitor and preparation method therefor
  • Epoxysuccinic acid-itaconic acid copolymerized green scale and corrosion inhibitor and preparation method therefor
  • Epoxysuccinic acid-itaconic acid copolymerized green scale and corrosion inhibitor and preparation method therefor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Synthesize epoxy succinic acid-itaconic acid copolymer according to the following steps, add maleic anhydride and deionized water in the four-necked flask equipped with reflux condenser, constant pressure dropping funnel, thermometer and stirrer, after stirring and dissolving, Slowly add 50% (mass fraction) of sodium hydroxide solution dropwise to hydrolyze maleic anhydride into maleic acid, heat it in a water bath to a certain temperature, add a quantitative amount of catalyst sodium tungstate, add the oxidant hydrogen peroxide dropwise into the constant pressure dropping funnel and use it at the same time NaOH solution adjusts the pH value and reacts to generate epoxysuccinic acid. According to the ratio of the amount of itaconic acid and epoxy succinic acid to 3:1 or 4:1 or 5:1, add itaconic acid to the flask, and put the flask into a place that has been adjusted to 75°C or 85°C or Heat in a constant temperature water bath at 95°C, stir to dissolve the itaconic acid,...

Embodiment 2

[0034] Embodiment 2 adds itaconic acid in the four-necked flask that has generated epoxysuccinic acid, adjusts itaconic acid addition, reacts by the ratio of the amount of substance of itaconic acid listed in table 2 and epoxysuccinic acid, Stir to dissolve the itaconic acid, control the reaction temperature to 85° C., and neutralize with 50% (mass fraction) sodium hydroxide solution until the pH is 9-10. Use a constant pressure dropping funnel to add the initiator ammonium persulfate at a constant speed. The mass of ammonium persulfate is 11% of the total mass of the monomer. Under nitrogen protection, heat to reflux and stir mechanically. The dropping time is 0.5h. After the dropping is completed, continue Insulation reaction 4h. Cool and stop stirring to obtain the product epoxysuccinic acid-itaconic acid copolymer solution of the present invention. The results of the research on the scale inhibition performance of the copolymerized products on calcium carbonate are listed...

Embodiment 3

[0038] Add 4.91g (0.05mol) of maleic anhydride and 8mL of deionized water into a four-neck flask, stir to dissolve, slowly add 8g of 50% (mass fraction) sodium hydroxide solution dropwise, heat to 70°C in a water bath, and add 0.08g of catalyst Sodium tungstate, the oxidant hydrogen peroxide was added dropwise to the constant pressure dropping funnel, and the dropping time was 20 minutes. At the same time, 50% (mass fraction) sodium hydroxide solution was used to adjust the pH value to 7~8, and the reaction was continued for 2 hours, and the reaction produced 6.49g (0.0492mol) epoxysuccinic acid, the yield of epoxysuccinic acid was 98.3%. According to the material ratio of itaconic acid and epoxy succinic acid is 4:1, add 25.56g (0.197mol) itaconic acid to the flask, and heat it in a water bath to 70°C or 75°C or 80°C or 85°C or 90°C ℃, stirring to dissolve the itaconic acid, and continue to use 50% (mass fraction) sodium hydroxide solution to adjust the pH value to about 8-9....

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

PropertyMeasurementUnit
Surface areaaaaaaaaaaa
Login to View More

Abstract

The invention discloses an epoxysuccinic acid-itaconic acid copolymerized green scale and corrosion inhibitor, and belongs to the technical field of reverse osmosis membrance water treatment chemicals. The scale and corrosion inhibitor is synthesized by copolymerizing epoxysuccinic acid and itaconic acid as monomers. A general formula (I) of the polymer is defined in the specification, wherein both m and n are integers of 1-10. The invention furthermore discloses a preparation method for the epoxysuccinic acid-itaconic acid copolymerized green scale and corrosion inhibitor. According to the epoxysuccinic acid-itaconic acid copolymerized green scale and corrosion inhibitor, functional groups such as carboxyl groups, ether groups and the like are introduced in molecules, so that the polymer has excellent scale inhibition and dispersion performance for calcium carbonate and calcium sulfate, and has a certain corrosion inhibition effect on carbon steel; and the scale inhibition rates of the epoxysuccinic acid-itaconic acid copolymer to calcium carbonate and calcium sulfate can both reach 100.0% when the dosage of the epoxysuccinic acid-itaconic acid copolymer is 18mg.L<-1>. According to the preparation method, raw materials for synthesizing the copolymer are easily available, reaction conditions are mild, a copolymerized product is biodegradable, non-phosphorus and free of environmental impact, and synthetic and post-treatment costs are low.

Description

technical field [0001] The invention belongs to the technical field of reverse osmosis membrane water treatment agents, in particular to an epoxy succinic acid-itaconic acid copolymerized green scale and corrosion inhibitor and a preparation method thereof. Background technique [0002] As the number of repeated uses of industrial circulating cooling water increases, the concentration of metal ions in the water increases, and it is easy to form insoluble salts to deposit and scale on the surface of the heat exchanger, causing corrosion of metal equipment and shortening its service life. Adding scale and corrosion inhibitors to the system is an effective method to slow down scaling and corrosion. Traditional scale and corrosion inhibitors often contain phosphorus, which is easily hydrolyzed, causing eutrophication of water bodies, and causing a certain degree of environmental pollution. The development of phosphorus-free, biodegradable and efficient scale and corrosion inhib...

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): C02F5/10C07C51/367C07C59/305
CPCC02F5/10C02F2103/023C02F2303/08C02F2303/22C02F2305/04C07C51/367C07C59/305
Inventor 石文艳邵荣许伟吴俊颜秀花董小飞李凯
Owner 成都纳海川环境工程有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com