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Preparation method of scale and corrosion inhibitor for chemical industry field

A scale and corrosion inhibitor, a technology in the field, applied in chemical instruments and methods, scale removal and water softening, complex/solubilizer treatment, etc., can solve problems such as scaling and corrosion of equipment pipelines, achieve low production costs, Simple process flow and good scale inhibition effect

Inactive Publication Date: 2013-06-05
安徽省蓝天能源环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The cooling water is continuously circulated and concentrated during use, and the mineral content in the water is also increasing, which causes scaling and corrosion of equipment pipes

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0006] Example 1. Add 60kg of polymaleic acid with an average molecular weight of 5600 into 30kg of aqueous solution, then add 10kg of zinc sulfate, and stir fully without precipitation to obtain a scale and corrosion inhibitor for the chemical industry.

Embodiment 2

[0007] Example 2. Add 40kg of polymaleic acid with an average molecular weight of 6500 into 40kg of aqueous solution, then add 20kg of zinc sulfate, and stir fully without precipitation to obtain a scale and corrosion inhibitor for the chemical industry.

Embodiment 3

[0008] Example 3. Add 20kg of polymaleic acid with an average molecular weight of 8600 into 70kg of aqueous solution, then add 10kg of zinc sulfate, and stir fully without precipitation to obtain a scale and corrosion inhibitor for the chemical industry.

[0009] The measurement of scale inhibition performance is carried out by the static scale inhibition test method. For details, refer to the measurement of scale inhibition performance of water treatment agents - calcium carbonate deposition method; the measurement of corrosion inhibition performance is carried out by the method of weight loss on rotating coupons. For details, refer to the corrosion inhibition performance of water treatment agents. Determination—rotary hanging plate method, using the measurement results prepared in the above three embodiments, the scale inhibition rate and corrosion inhibition rate are both greater than 95%, and the scale inhibition and slow release effect is better.

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Abstract

The invention discloses a preparation method of a scale and corrosion inhibitor for the chemical industry field and belongs to the technical field of chemical industry. The preparation method of the scale and corrosion inhibitor for the chemical industry field is technically characterized in that polymaleic anhydride with an average molecular weight higher than 5500 is used as a main raw material; water is used as a solvent; carboxyl (-COOH) in the raw material is hydrolyzed to be -CO- and -OH; zinc sulfate is added; and metal zinc ions and the polymaleic anhydride with high molecular weight form a stable complexation material through a complexation reaction. The preparation method of the scale and corrosion inhibitor for the chemical industry field is simple in technological process of production, stable in product quality and high in scale and corrosion inhibition rate. Meanwhile, the production process is an environment-friendly cleaning process. The preparation method of the scale and corrosion inhibitor for the chemical industry field is free from discharging of three industrial wastes, simple and convenient to operate, low in production cost and suitable for industrialization scale production.

Description

technical field [0001] The invention relates to a preparation method of a scale and corrosion inhibitor used in the chemical industry, and belongs to the technical field of chemical industry. Background technique [0002] With the rapid development of chemical industry production, the water consumption of chemical industry has also increased significantly. The continuous circulation and concentration of cooling water during use will increase the mineral content in the water, which will cause scaling and corrosion of equipment pipes. In order to prevent fouling of equipment pipelines, improve equipment utilization, save energy and water sources, and ensure normal production, it is necessary to add various scale and corrosion inhibitors to the circulating cooling water. At present, the scale inhibitors used in industrial circulating cooling water mainly include polyphosphate, organic phosphate, polycarboxylic acid and other types. Polyphosphate and organic phosphate phosphor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F5/08C02F5/10
Inventor 邢献军马培勇陈天河杨海波宁秀梅
Owner 安徽省蓝天能源环保科技有限公司
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