Composite scale and corrosion inhibitor

A technology of scale and corrosion inhibitor, circulating cooling water, applied in complex/solubilizer treatment, descaling and water softening, water/sludge/sewage treatment, etc., can solve the problem that water cannot be directly recycled, etc. To achieve the effect of enhanced scale and corrosion inhibition, good corrosion and scale inhibition performance, and a wide range of applications

Inactive Publication Date: 2013-08-14
北京市龙源科创石油技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Water is the blood of industry. At present, in industries that consume a lot of water such as industry and agriculture, water conservation is a relatively large issue. The existing better method is to recycle coolin

Method used

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  • Composite scale and corrosion inhibitor
  • Composite scale and corrosion inhibitor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 10.0g 2-phosphono-1,2,4-butane tricarboxylate (PBTCA), 8.0g hydroxyethylene diphosphonic acid (HEDP), 1.0g benzotriazole (BTA), 1.0g chlorine Zinc chloride, 15.0g acrylic acid / hydroxypropyl acrylate / 2-acrylamide-2-methylpropanesulfonic acid (AA / HPA / AMPS), 10.0g polyepoxysuccinic acid (PESA) and dilute to 100g with deionized water, Formulated as a composite scale and corrosion inhibitor.

[0025] Put the composite scale and corrosion inhibitor formulated above into the circulating cooling water described in the table below at a temperature of 50°C and a speed of 75r / min. The test time is 72 hours. The calcium hardness in the table is expressed as CaCO 3 count.

[0026] project

Embodiment 2

[0028] 15g of 2-phosphono-1,2,4-butane tricarboxylate (PBTCA), 10g of hydroxyethylidene diphosphonic acid (HEDP), 1.2g of benzotriazole (BTA), 7.5g of zinc chloride , 10.0g acrylic acid / hydroxypropyl acrylate / 2-acrylamide-2-methylpropane sulfonic acid (AA / HPA / AMPS), 7.5g polyepoxysuccinic acid (PESA) plus deionized water diluted to 100g, prepared Composite scale and corrosion inhibitor.

[0029] Put the composite scale and corrosion inhibitor formulated above into the circulating cooling water described in the table below at a water temperature of 50°C and a rotational speed of 75r / min. The test time is 72 hours. The calcium hardness in the table is expressed as CaCO 3 count.

[0030] project

Conductivity

calcium hard

Alkalinity

Cl -

SO 4 2-

pH

unit

μs / cm

mg / L

mg / L

mg / L

mg / L

data

432

162.19

46.41

11.12

162.23

7.73

[0031] Embodiment result is:

[0032]

[0033] ...

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PUM

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Abstract

The invention discloses a composite scale and corrosion inhibitor. The inhibitor is characterized by comprising the following main ingredients: 2-phosphono-1,2,4-tricarboxylic acid, hydroxyethylidene-1,1-diphosphonic acid, an acrylic copolymer, benzotriazole, zinc chloride, polyepoxysuccinic acid and deionized water. The inhibitor disclosed by the invention has the following beneficial effects that 2-phosphono-1,2,4-tricarboxylic acid, the hydroxyethylidene-1,1-diphosphonic acid, the acrylic copolymer, benzotriazole, zinc chloride and the polyepoxysuccinic acid of the inhibitor all have good scale and corrosion resistance; and after the above ingredients are compounded according to the weight parts in the formulation of the inhibitor disclosed by the invention, the scale and corrosion resistance effect of the inhibitor is obviously enhanced. The inhibitor disclosed by the invention is suitable for high hardness and high base, and has extremely strong complexing function on carbonate scale. The composite sale and corrosion inhibitor is good in scale and corrosion resistance, low in phosphorus content, and therefore is capable of meeting environment protection requirements. The inhibitor disclosed by the invention not only is suitable for circulating cooling water in a natural gas purification treatment plant, but also is suitable for circuiting cooling water systems in other industries of chemical fertilizer, power, textile and the like, as well as is wide in application range; and acid does not need to be added for regulating PH (Potential of Hydrogen) value.

Description

technical field [0001] The invention relates to the technical field of industrial circulating water treatment, in particular to a composite scale and corrosion inhibitor. Background technique [0002] Water is the blood of industry. At present, in industries with large water consumption such as industry and agriculture, water conservation is a relatively large issue. The existing better method is to recycle cooling water. However, the quality of water discharged from industries is different. , so that the water cannot be directly recycled, and must go through a series of treatment processes before it can be used in production again. [0003] Industrial circulating cooling water systems will encounter some problems when dealing with circulating cooling water, such as scaling, corrosion and microbial hazards in industrial circulating cooling water systems. The existing method to solve the above problems is mainly to add scale and corrosion inhibitors to the circulating coolin...

Claims

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Application Information

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IPC IPC(8): C02F5/08C02F5/10C02F5/14
Inventor 闫金铎
Owner 北京市龙源科创石油技术有限公司
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