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Neutral cleaning agent

A neutral cleaning agent, a technology with a percentage by weight, applied in the field of chemical cleaning, can solve the problems of harming the environment, corroding equipment, cumbersome operation, etc., and achieves good descaling effect and small corrosion effect.

Inactive Publication Date: 2018-01-19
NINGXIA PAGODA CHEM CENT LAB CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002]In industrial cleaning, inorganic acids such as hydrochloric acid, nitric acid, and sulfuric acid, and organic acids such as sulfamic acid, citric acid, and glycolic acid are commonly used to remove dirt on the surface of equipment. There are problems such as cumbersome operation, corrosion equipment, and environmental hazards.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] 2% glycolic acid, 2% formic acid, 2% ethylenediaminetetraacetic acid salt, 0.1% sodium hexametaphosphate, the balance water.

Embodiment 2

[0012] 5% glycolic acid, 5% formic acid, 3.5% ethylenediaminetetraacetic acid salt, 0.3% sodium hexametaphosphate, the balance water.

Embodiment 3

[0014] 10% glycolic acid, 10% formic acid, 5% ethylenediaminetetraacetic acid salt, 0.5% sodium hexametaphosphate, the balance water.

[0015] The above three cleaning agents were tested on carbon steel and stainless steel test pieces using the corrosion rate and corrosion measurement methods in HG / T2387-2007 "Quality Standards for Chemical Cleaning of Industrial Equipment". The final results showed that the above three cleaning agents The corrosion rate to carbon steel is less than 2g / (m 2 h), the corrosion rate to stainless steel is less than 0.2g / (m 2 h), basically no corrosion.

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Abstract

The invention discloses an environment-friendly neutral cleaning agent. The environment-friendly neutral cleaning agent is composed of, by weight percent, 2%-10% of glycolic acid, 2%-10% of formic acid, 2%-5% of ethylenediamine tetraacetate, 0.1%-0.5% of sodium hexametaphosphate and the balance water. In the environment-friendly neutral cleaning agent, glycolic acid and formic acid serve as the main cleaning agent, corrosion to equipment is quite small, and the equipment can be cleaned continuously for a long time; and ethylenediamine tetraacetate can serve as a chelating agent, and sodium hexametaphosphate serves as a corrosion inhibitor. The optimal pH of the cleaning agent ranges from 6.0 to 6.5, and the action of the corrosion inhibitor is optimal under the condition of the pH.

Description

technical field [0001] The invention relates to the field of chemical cleaning, in particular to a neutral cleaning agent. Background technique [0002] In industrial cleaning, inorganic acids such as hydrochloric acid, nitric acid, and sulfuric acid, and organic acids such as sulfamic acid, citric acid, and glycolic acid are commonly used to remove dirt on the surface of equipment. During the cleaning process, there are problems such as cumbersome operation, equipment corrosion, and environmental hazards. [0003] Neutral cleaning agents have the advantages of easy operation, no pollution, and slight corrosion. The demand for research and development of neutral and environmentally friendly cleaning agents is very urgent. Contents of the invention [0004] The invention discloses an environment-friendly neutral cleaning agent, and the technical scheme is as follows: [0005] A kind of neutral cleaning agent, it is characterized in that by weight percentage 2-10% glycolic ...

Claims

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Application Information

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IPC IPC(8): C23G1/26
Inventor 杨晓丽
Owner NINGXIA PAGODA CHEM CENT LAB CO LTD
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