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Phosphorus-free green composite corrosion and scale inhibitor

A technology of corrosion and scale inhibitors and corrosion synergists, which is applied in complex/solubilizer treatment, scale removal and water softening, natural water treatment, etc., can solve problems such as high cost and narrow application range, and achieve environmental protection Less pollution, lower cost, and overcoming water eutrophication and high toxicity

Active Publication Date: 2010-08-18
SHANGHAI EMPEROR OF CLEANING HI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to overcome the shortcomings of the existing water treatment agents, such as high cost, narrow application range, and unsuitability for corrosive water quality. The synergistic effect between each other provides a non-toxic, non-phosphorus, green, low-cost, and good corrosion and scale inhibition water treatment agent

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 1. Prepare 100g of composite corrosion and scale inhibitor containing polyepoxysuccinic acid

[0028] Composite corrosion and scale inhibitor formula: polyepoxysuccinic acid (PESA) 20g, hydrolyzed polymaleic acid (HPMA) 10g, acrylic acid / hydroxypropyl acrylate copolymer (AA / HPA) 15g, ECH corrosion inhibitor synergist 5g , 15g of zinc sulfate heptahydrate, 35g of deionized water, shake well, and get it.

[0029] 2. Add the prepared agent to the test water at a concentration of 100mg / L. The effective concentrations of PESA, HPMA, AA / HPA, ECH corrosion inhibitor synergist and zinc sulfate heptahydrate in the water are 20mg / L respectively. , 10mg / L, 15mg / L, 5mg / L and 15mg / L. The measured carbon steel corrosion inhibition rate is 96.8%, and the calcium carbonate scale inhibition rate is 90.3%.

Embodiment 2

[0031] 1. Prepare 100g of composite corrosion and scale inhibitor containing polyaspartic acid

[0032] Composite corrosion and scale inhibitor formula: polyaspartic acid (PASP) 30g, hydrolyzed polymaleic acid (HPMA) 5g, acrylic acid / 2-methyl-2'-acrylamidopropanesulfonic acid copolymer (AA / AMPS ) 15g, ECH corrosion inhibitor synergist 8g, zinc sulfate heptahydrate 10g, deionized water 32g, shake well, and get final product.

[0033] 2. When the prepared agent is added to the test water at a concentration of 100mg / L, the effective concentrations of PASP, HPMA, AA / AMPS, ECH corrosion inhibitor synergist and zinc sulfate heptahydrate in the water are 30mg / L respectively. L, 5mg / L, 15mg / L, 8mg / L and 10mg / L. The measured carbon steel corrosion inhibition rate is 98.3%, and the calcium carbonate scale inhibition rate is 94.7%.

Embodiment 3

[0035]1. Prepare 100g of composite corrosion and scale inhibitor containing polyepoxysuccinic acid

[0036] Composite corrosion and scale inhibitor formula: Polyepoxysuccinic acid (PESA) 20g, hydrolyzed polymaleic acid (HPMA) 10g, acrylic acid / 2-methyl-2'-acrylamidopropanesulfonic acid copolymer (AA / AMPS ) 10g, ECH corrosion inhibitor synergist 8g, zinc sulfate heptahydrate 12g, deionized water 40g, shake well, and get final product.

[0037] 2. When the prepared agent is added to the test water at a concentration of 100mg / L, the effective concentrations of PESA, HPMA, AA / AMPS, ECH corrosion inhibitor synergist, and zinc sulfate heptahydrate in the water are 20mg / L respectively. L, 10mg / L, 10mg / L, 8mg / L and 12mg / L. The measured carbon steel corrosion inhibition rate is 92.5%, and the calcium carbonate scale inhibition rate is 90.7%.

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Abstract

The invention discloses a phosphorus-free green composite corrosion and scale inhibitor, which comprises polyaspartic acid or polyepoxysuccinic acid, maleic acid homopolymers, acrylic copolymers, inorganic zinc salt, an ECH inhibition synergist and water. The ECH inhibition synergist is mixture of lanthanum nitrate and sodium gluconate mixed according to a mass ratio of 1:10-1:5. The phosphorus-free green composite corrosion and scale inhibitor of the invention is phosphorus-free, non-toxic and highly biodegradable, and not only can overcome the defects of water body eutrophication and high toxicity caused by water treatment agents containing phosphorus, chromium, nitrite and the like, but also can be used for treatment of corrosive water with low alkalinity and low concentration and can satisfy the requirements of circulating water with high temperature, high alkalinity, high hardness and high pH value at present. Moreover, the invention is a multifunctional security and environmental protection type water treatment agent with a function of inhibiting both corrosion and scale.

Description

technical field [0001] The invention relates to a phosphorus-free green composite corrosion and scale inhibitor. Background technique [0002] Water is the source of life and an important chemical substance necessary for human survival. With the development of the economy and the growth of the population, the crisis presented by the scarcity of water resources is becoming more and more serious. In order to protect the increasingly scarce fresh water resources, on the one hand, large-scale seawater desalination technology can provide a large amount of fresh water for human beings; on the other hand, it is to save water, especially the use of efficient water quality stabilization technology in industrial production with huge water consumption has become a water-saving strategy. only way. In terms of water-saving technology, the most direct and effective way to save water is to develop a multi-functional water quality stabilizer suitable for high concentration multiples. [...

Claims

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Application Information

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IPC IPC(8): C02F5/08
CPCC23F11/08C02F5/105C02F5/125C02F2103/023C02F2303/08
Inventor 王炜
Owner SHANGHAI EMPEROR OF CLEANING HI TECH
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