Polymaleic acid boiler scale-inhibition corrosion inhibitor

A scale and corrosion inhibitor, polymaleic acid technology, applied in the direction of scale removal and water softening, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problem of unsatisfactory effect, small molecular weight, high temperature resistance Poor and other problems, to achieve the effect of safe use, excellent scale inhibition performance, thermal efficiency improvement

Active Publication Date: 2009-11-18
安徽海瀚水处理科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the best organic salt agent is polyacrylic acid (sodium), but because of its small molecular weight and poor high temperature resistance, its effect on boiler water treatment is not ideal

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Example 1. The molecular weight of polyepoxysuccinic acid is 800, the aqueous solution 15kg that content is 50%, add polymaleic acid average molecular weight and be 5500, in the aqueous solution 50kg that content is 50%, add citric acid 2kg again, zinc salt 10kg, stir fully Precipitate to get polymaleic acid boiler scale and corrosion inhibitor.

Embodiment 2

[0012] Example 2. The polyepoxysuccinic acid molecular weight is 800, and content is 20kg of the aqueous solution of 50%, adding polymaleic acid average molecular weight is 6500, and content is in the aqueous solution 60kg of 50%, then adds citric acid 3kg, zinc salt 12kg, stirs fully without Precipitate to get polymaleic acid boiler scale and corrosion inhibitor.

Embodiment 3

[0013] Example 3. The molecular weight of polyepoxysuccinic acid is 800, content is 25kg of aqueous solution of 50%, adding polymaleic acid average molecular weight is 8600, content is in the aqueous solution 70kg of 50%, add citric acid 4kg again, zinc salt 14kg, stir fully without Precipitate to get polymaleic acid boiler scale and corrosion inhibitor.

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PUM

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Abstract

The invention relates to a polymaleic acid boiler scale-inhibition corrosion inhibitor, belonging to the technical field of chemical products, and aiming at providing a polymaleic acid boiler scale-inhibition corrosion inhibitor with high scale-inhibition rate and small corrosion rate. The average molecular weight of the polymaleic acid is larger than 5500, and the components and mass percentage thereof are as follows: 50 to 70 of aqueous solution with the content of polymaleic acid being 50 percent, 15 to 25 of aqueous solution with the content of polyepoxysuccinic acid being 50 percent, 2 to 4 of citric acid, and 10 to 14 of zinc salt. The preparation method comprises the following steps of: adding the polyepoxysuccinic acid into the aqueous solution of the polymaleic acid, and then adding the citric acid and the zinc salt, fully stirring the mixture until no precipitation exists, thus obtaining the final product. In the boiler scale-inhibition corrosion inhibitor, the scale-inhibition rate can reach more than 99 percent, and the corrosion rate is less than 0.011mm / a, thus not only being economical, practical and efficient, but also having significant economic and social benefits. The polymaleic acid boiler scale-inhibition corrosion inhibitor not only can be used for water treatment in the boiler, but also can be used for scale inhibition and corrosion inhibition in circulating cooling water in electrical power and petrochemical industries, seawater desalination, central air conditioner, water heater and the like.

Description

technical field [0001] The invention relates to a polymaleic acid boiler scale and corrosion inhibitor, which belongs to the technical field of chemical products. Background technique [0002] Boilers are important heat energy supply equipment in the national economy, widely used in electric power, machinery, chemical industry, textile, papermaking, food and other industries and people's daily life and work. The quality of its operation is directly related to people's lives and property The safety of the country is also directly related to the healthy development of the economy. Among them, boiler water treatment is an important part to ensure the safe and economical operation of boilers. [0003] Boiler water treatment is to prevent the formation of scale, control the corrosion of metals, and prevent steam pollution, so as to achieve the purpose of safe and economical operation. Internationally, the research on boiler water treatment in some developed countries mainly ado...

Claims

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Application Information

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IPC IPC(8): C02F5/10
Inventor 邢献军
Owner 安徽海瀚水处理科技有限公司
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