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Phosphorus-free scale and corrosion inhibitor and preparation method thereof

A phosphorus-free scale and corrosion inhibitor technology, applied in chemical instruments and methods, descaling and water softening, natural water treatment, etc., can solve problems such as environmental pollution, improve scale inhibition efficiency, reduce scale deposition, The effect of reducing the content of phosphorus

Inactive Publication Date: 2019-12-03
SHANGHAI FENGXIN ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The phosphorus in the water is discharged along with the concentrated water, which also causes some pollution to the environment.

Method used

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  • Phosphorus-free scale and corrosion inhibitor and preparation method thereof
  • Phosphorus-free scale and corrosion inhibitor and preparation method thereof
  • Phosphorus-free scale and corrosion inhibitor and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The composite non-phosphorus scale and corrosion inhibitor provided in this example is formed by mixing and stirring the following raw materials in mass percentage at room temperature: 10% sodium gluconate, 8% sodium benzoate, 2-acrylamido-2-methylpropane 10% sulfonic acid, 5% polyaspartic acid, 8% polyepoxysuccinic acid, 3% diaminetetraacetic acid, and the rest is ultrapure water.

[0025] The method of use is: the dosage of the product after synthesis is 20-100ppm.

[0026] experiment method:

[0027] (A) The circulating cooling water of the test object is divided into multiple parts;

[0028] (B) get the composite non-phosphorus scale and corrosion inhibitor of the present embodiment, dosing 20ppm (B1), 50ppm (B2), 100ppm (B3) process the circulating cooling water in A;

[0029] (C) Get the treatment agent of commercially available polyphosphoric acid class, dosage 20ppm (C1), 50ppm (C2), 100ppm (C3), process the circulating cooling water in A;

[0030] (D) Get th...

Embodiment 2

[0036] The composite non-phosphorus scale and corrosion inhibitor provided in this example is formed by mixing and stirring the following raw materials in mass percentage at room temperature: 12% sodium gluconate, 5% sodium benzoate, 2-acrylamido-2-methylpropane 8% sulfonic acid, 5% polyaspartic acid, 8% polyepoxysuccinic acid, 1% diaminetetraacetic acid, and the rest is ultrapure water. A good long-term scale inhibition effect can be achieved when the dosage is 20-100ppm.

Embodiment 3

[0038] The composite non-phosphorus scale and corrosion inhibitor provided in this example is formed by mixing and stirring the following raw materials in mass percentage at room temperature: 10% sodium gluconate, 7% sodium benzoate, 2-acrylamido-2-methylpropane 8% sulfonic acid, 7% sodium polyaspartate, 8% polyepoxysuccinic acid, 1% tetrasodium diaminetetraacetic acid, and the rest is ultrapure water. A good long-term scale inhibition effect can be achieved when the dosage is 20-100ppm.

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Abstract

The invention provides a phosphorus-free scale and corrosion inhibitor. The phosphorus-free scale and corrosion inhibitor is characterized by being prepared from the following components in percentages by mass: 10-12% of gluconic acid and / or a salt thereof, 5-8% of benzoic acid and / or a salt thereof, 8-10% of 2-acrylamido-2-methylpropanesulfonic acid, 5-8% of polyaspartic acid and / or a salt thereof, 5-8% of polyepoxysuccinic acid and analogues thereof, 1-3% of ethylenediaminetetraacetic acid and / or a salt thereof and the balance of water. A scale and corrosion inhibitor phosphorus-free water treatment formula is adopted, and the effect is excellent.

Description

technical field [0001] The invention relates to a phosphorus-free scale and corrosion inhibitor, in particular to a phosphorus-free scale and corrosion inhibitor and a preparation method thereof. Background technique [0002] In the industrial production process, the circulating cooling water system is a frequently used water circulation system. However, during the recycling process, water evaporation, temperature rise, pH change, water flow rate change, etc., plus water often contain alkaline earth metal cations, such as Ca2+, Mg2+, Ba2+ and other small amounts of cations. These cations will form insoluble / slightly soluble inorganic salts (such as CaCO3, CaSO4, Ca3(PO4)2, Mg(OH) 2, etc.), and then fouling on the surface of the heat exchanger or pipe, resulting in lower heat transfer efficiency. The use of high-efficiency antiscalants is one of the key technologies to keep the cooling water circulation system running well. [0003] The emergence and use of corrosion and s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F5/12C02F103/02
CPCC02F5/12C02F2103/023
Inventor 张金山夏志先
Owner SHANGHAI FENGXIN ENVIRONMENTAL PROTECTION TECH
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