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Corrosion and scale inhibitor containing polyepoxysuccinic acid salt

A technology of polyepoxysuccinic acid and corrosion and scale inhibitors, which can be used in the fields of scale removal and water softening, water/sludge/sewage treatment, chemical instruments and methods, etc. Reports on sodium compounding and other issues

Inactive Publication Date: 2009-10-28
北京合创同盛科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] So far, there is no report of pentasodium diethylenetriaminepentaacetate as a component of corrosion and scale inhibitors, especially compounded with polyepoxysuccinate

Method used

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  • Corrosion and scale inhibitor containing polyepoxysuccinic acid salt

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0030] 250mg sodium polyepoxysuccinate (content 30%, Beijing Lianzhong Dadi Technology Co., Ltd., the same below), 67mg hydroxydiethyldiphosphonic acid (content 30%, Shandong Taihe Water Treatment Co., Ltd., the same below), 9.4mg Acrylic acid and 2-methyl-2'-acrylamido propane sulfonic acid copolymer (active component content 50%, Shandong Province Taihe Water Treatment Co., Ltd., the limit viscosity is 0.78dl / g at 30 ℃, AA / AMPS=70 / 30, the same below), 0.6mg of pentasodium diethylenetriaminepentaacetate (50% content, Shanghai Nanxiang Reagent Co., Ltd., the same below) and 200ml of water are placed in a container and stirred evenly to obtain the product, numbered B1 .

[0031] High alkali and high hardness test water (the following examples are the same as the comparative examples): total alkalinity 330 (as CaCO 3 meter), total hardness 380 (calculated as CaCO 3 meter), total dissolved solids 762mg / L, conductivity 1025μs / cm, pH8.2, SO 4 2- =122mg / L, Ca 2+ =268mg / L, Cl ...

example 2

[0034] 250mg sodium polyepoxysuccinate, 67mg hydroxydiethyldiphosphonic acid, 8.8mg acrylic acid and 2-methyl-2'-acrylamidopropanesulfonic acid copolymer, 1.2mg pentasodium diethylenetriaminepentaacetic acid and 1L of water, placed in a container and stirred evenly, the obtained product number is B2.

[0035] Add B2 to the test water according to the concentration of 3mg effective sodium polyepoxysuccinate in 1L of water, the corrosion inhibition performance test R is 0.011mm / a, the static scale inhibition performance test has a calcium carbonate scale inhibition rate of 89.7%, and a calcium phosphate scale inhibition rate 99.8%.

example 3

[0037] 250mg sodium polyepoxysuccinate, 67mg hydroxydiethyldiphosphonic acid, 8.2mg acrylic acid and 2-methyl-2'-acrylamidopropanesulfonic acid copolymer, 1.8mg pentasodium diethylenetriaminepentaacetic acid and 1L of water, placed in a container and stirred evenly, the product number obtained is B3.

[0038] Add B3 to the test water according to the concentration of 3mg effective sodium polyepoxysuccinate in 1L water, the corrosion inhibition performance test R is 0.010mm / a, the static scale inhibition performance test calcium carbonate scale inhibition rate is 89.8%, calcium phosphate scale inhibition rate 99.6%.

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Abstract

The invention discloses a corrosion and scale inhibitor containing polyepoxysuccinic acid salt. The corrosion and scale inhibitor comprises polyepoxysuccinic acid salt and diethylene triamine pentacetic acid sodium, and the mass ratio of the diethylene triamine pentacetic acid sodium to the polyepoxysuccinic acid salt is 55-90:0.1-6. In particular, by further adjusting the mass ratio of the diethylene triamine pentacetic acid sodium to the polyepoxysuccinic acid salt, the corrosion and scale inhibitor has good corrosion and scale inhibition effect on the water with high hardness and high alkalinity.

Description

technical field [0001] The invention relates to a corrosion and scale inhibitor composition, more specifically, the invention relates to a corrosion and scale inhibitor containing polyepoxy succinate for water treatment. Background technique [0002] Polyepoxysuccinic acid (PESA) is a new generation of green and environmentally friendly water treatment agent developed in the 1990s. It is a green scale inhibitor with phosphorus-free, non-nitrogen and good biodegradability. Its scale inhibition effect is obviously better than that of Commonly used organic phosphonic acid scale inhibitors. Polyepoxy succinate has good scale inhibition and dispersion performance on calcium carbonate, calcium sulfate, barium sulfate, calcium fluoride and silicon scale in water, and the scale inhibition effect is better than that of commonly used organophosphorus scale inhibitors. Sodium polyepoxysuccinate and phosphonate have a good synergistic effect. At the same time, sodium polyepoxysuccinat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F5/14
Inventor 赵勇军多文赵新
Owner 北京合创同盛科技有限公司
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