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Safety on-line contaminant removing cleaning agent

A cleaning agent and a safe technology, which can be used in detergent compositions, non-surface-active detergent compositions, cleaning hollow objects, etc., and can solve the corrosion of equipment pipeline substrates, metal substrate corrosion, and the greater corrosiveness of cleaning and descaling agents. and other problems to achieve the effect of inhibiting corrosion and preventing corrosion

Inactive Publication Date: 2007-08-08
DALIAN SANDAAOKE CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing cleaning process and process are relatively complicated, involving multiple processes such as water flushing, leak testing, establishment of a circulation system, descaling process, neutralization process, passivation process, and several flushing processes
The pipelines of the equipment after cleaning with this cleaning and descaling agent have great potential safety hazards due to the high corrosiveness of the cleaning and descaling agent to metal materials.
Not only will the equipment pipeline substrate be greatly corroded during the cleaning process, but after cleaning, the hydrogen ions and acid radical ions remaining on the surface of the equipment pipeline will continue to corrode the metal substrate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0035] Prepare the descaling cleaning agent according to the following raw material types and weight ratio:

[0036] Hydroxyethylidene diphosphate 15.0%

[0037] Benzotriazole 0.4%

[0038] Polyacrylic acid 8.6%

[0039] Water 76.0%

[0040] Mix the raw materials according to the above formula and stir evenly. The product is light yellow transparent liquid, odorless.

[0041] Use the prepared descaling and cleaning agent to clean the cooling water pipes and heat exchange surfaces of the scaled cooling heat exchanger on-line at 40-50°C, and use the water pump to circulate the descaling and cleaning. The descaling rate reaches 85% within 10 hours. above. No corrosion to equipment. After driving, the heat exchange efficiency is greatly improved.

example 2

[0043] Prepare the descaling cleaning agent according to the following raw material types and weight ratio:

[0044] Hydroxyethylidene diphosphate 70.0%

[0045] Benzotriazole 0.6%

[0046] Polyacrylic acid 14.4%

[0047] Water 15.0%

[0048] Mix the raw materials according to the above formula and stir evenly. The product is light yellow transparent liquid, odorless.

[0049] The descaling effect is the same as above.

example 3

[0051] Prepare the descaling cleaning agent according to the following raw material types and weight ratio:

[0052] Hydroxyethylidene diphosphate 67.0%

[0053] Benzotriazole 0.6%

[0054] Polymaleic anhydride 14.4%

[0055] Sodium Hydroxide 3.0%

[0056] Water 15.0%

[0057] Mix the raw materials according to the above formula and stir evenly. The product is light yellow transparent liquid, odorless.

[0058] It is used for descaling and cleaning of the cooling system of an engine, and it is ready for 15 hours at room temperature.

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PUM

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Abstract

The invenito discloses a safe on-line descaling abluent, which comprises the following parts: 5.0-90.0w% chelating agent, 0.0-1.0w% inhibitor, 1.0-30.0w% macromolecular polymer, 0.0-20.0 w% sodium hydroxide and 5.0-80.0w% water, wherein the chelating agent one of hydroxy-ethidene diphosphoric acid, amino methylene triphosphate and EDTMPS; the inhibitor is benzo trinitroazolyl; the macromolecular polymer is polyacrylic acid or polymaleic anhydride with molecular weight at 10000-30000; the whole raw materials are dissolved in the water to stir evenly, which produce the product.

Description

Technical areas: [0001] The invention relates to the technical field of detergent compositions mainly based on non-surface active compounds. It is a combination of water-soluble compounds and contains organic phosphonic acid and hydroxide. It also relates to benzotriazoles formed by the fusion of a heterocyclic ring containing three nitrogen atoms and a carbocyclic ring; and polymerized acrylic acid. Background technique: [0002] The current chemical descaling and cleaning uses inorganic strong acid chemicals as the cleaning medium. The cleaning process is highly corrosive to the equipment and pipelines being cleaned, and is prone to cleaning accidents such as pitting, leakage, and perforation. It is also harmful to small pipelines. , Cleaning complex pipelines can easily lead to blockage. Once the sound is blocked, post-processing is very difficult. In addition, in terms of safety and environmental protection, this type of cleaning and descaling agent also has many disad...

Claims

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Application Information

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IPC IPC(8): C11D7/36B08B3/04B08B9/027C11D7/32C11D7/26C11D7/06
Inventor 王明望
Owner DALIAN SANDAAOKE CHEM
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