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Synthesis method of epoxysuccinic acid-2-(hydroxyimino) sodium malonate copolymer

A technology of epoxy succinic acid and hydroxyimino group is applied in the field of fine chemicals, which can solve the problems of single functional group and single performance, and achieve the effect of increasing the unit content and improving the scale and corrosion inhibition performance.

Pending Publication Date: 2021-03-26
SHANDONG TAIHE WATER TREATMENT TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problem of single functional group and single performance of polyepoxysuccinic acid in the prior art, the present invention provides a synthesis method of epoxysuccinic acid-2-(hydroxyimino)sodium malonate copolymer

Method used

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  • Synthesis method of epoxysuccinic acid-2-(hydroxyimino) sodium malonate copolymer
  • Synthesis method of epoxysuccinic acid-2-(hydroxyimino) sodium malonate copolymer

Examples

Experimental program
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Effect test

Embodiment 1

[0022] Step 1: 16 g of 2- (hydroxy-amino) malonate, 132 g of epoxy succinic acid, and 40 g of sodium hydroxide mixed with a monomer mixture, and transferred in a solid feeder for replacing the air with nitrogen.

[0023] Step 2: 186 g of ethylene glycol and 6.6 g of calcium hydroxide were added to the reactor, stir up to 72 ± 2 ° C, and the negative pressure was closed after -0.1 MPa, and the negative pressure was closed, and the air was used in a nitrogen gas transfer system for 20 min.

[0024] Step 3: Open the stirring, continue to heat up to 102 ± 2 ° C in the reaction kettle, put the monomer mixture at each batch of 5g, interval 5min, after 3.08 hours, continue to heat up 9h, add 50g water, drop the mass fraction 20% sodium hydroxide hydrolysis, through the sodium hydroxide dripping rate regulating system pH at 10 to 12, hydrolyzed 2 h, and the filtrate is evaporated to evaporate the ethylene glycol, methanol and water outside of -0.1MPa, and the remaining polymer is diluted ...

Embodiment 2

[0027] Step 1: 32 g of 2- (hydroxy-amino) malonate, 132 g of epoxy succinic acid, and 60 g of sodium hydroxide mixed with a monomer mixture, and transferred in a solid feeder for replacing the air with nitrogen.

[0028] Step 2: 310 g of ethylene glycol and 13.2 g of calcium hydroxide were added to the reactor, stir up to 78 ± 2 ° C, drowning at -0.08 MPa, 0.08 mPa, and closed the negative pressure, and the air was 20 min in the nitrogen gas exchange system.

[0029] Step 3: Open the stirring, continue to heat up to 108 ± 2 ° C, put the monomer mixture in 5 g, interval 5min, after 3.67 hours, continue to heat the temperature 12h, add 50g water, drop the mass fraction 20% hydroxide hydrolysis, by the sodium hydroxide dripping rate regulating system pH at 10 to 12, hydrolyzed 2h, the filtrate is evaporated to evaporate the ethylene glycol, methanol, and water at -0.08MPa, and the remaining polymer is diluted with water. The mass fraction is 40.37% of the epoxy succinate-2- (hydroxy-...

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Abstract

The invention discloses a synthesis method of an epoxysuccinic acid-2-(hydroxyimino) sodium malonate copolymer, which takes epoxysuccinic acid and 2-(hydroxyimino) dimethyl malonate as monomers, generates the copolymer by anionic polymerization, does not contain sulfur and phosphorus, has biodegradability, and is green and environment-friendly; the epoxysuccinic acid-2-(hydroxyimino) sodium malonate copolymer increases the content of carboxyl in unit mass, and hydroxyl is introduced, so that the unit content of an adsorption center is increased, and the scale and corrosion inhibition performance of the scale and corrosion inhibitor is effectively improved under the synergistic effect of different groups.

Description

Technical field [0001] The present invention relates to the field of fine chemicals, and more particularly to a synthesis method of epoxy succinate-2- (hydroxyimin) propylene acid sodium copolymer. Background technique [0002] Poly-epoxy succinic acid is a green water treatment agent, which has corrosion inhibition, scale inhibition, due to its phosphorus, non-nitrogen-like structure, does not make the water body eutrophic, and can be degraded by natural microorganisms, is A non-phosphorus complexing agent having a wide application of the environment-friendly multivariate scale inhibitor and detergent. [0003] The poly-epoxy succinic acid as a scale inhibitor, which does not fail to form a conventional scale inhibitor under high hardness, high alkalinity and high pH conditions. When the polyline oxo succinic acid is used as the scale inhibitor, it can reduce the amount of acid in the adjustment pH when the pH is used, and the amount of acid can be used for phosphate is limited ...

Claims

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Application Information

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IPC IPC(8): C08G65/28C02F5/12
CPCC08G65/2609C08G65/2618C02F5/12
Inventor 程终发周响
Owner SHANDONG TAIHE WATER TREATMENT TECH CO LTD
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