Citric acid discoloration incrustation cleaning agent and preparation method and application thereof

A cleaning agent and citric acid technology, applied in detergent compounding agents, detergent compositions, chemical instruments and methods, etc., can solve the problems of polluted environment, strong corrosiveness, and high corrosiveness of hydrochloric acid, and achieve fine and uniform bubbles, Improve the ability to remove scale, the effect of uniform gas

Inactive Publication Date: 2020-04-10
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional inorganic strong acid cleaning agent has the disadvantages of strong corrosiveness and environmental pollution.
[0004] Patent CN201811571334.9 relates to a preparation method of a color-changing scale cleaning agent. The basic acid of this patent is hydrochloric acid. Hydrochloric acid is highly corrosive. When removing scale from some equipment, it is required that the cleaning agent has little corrosion on the equipment. Cleaning agents containing hydrochloric acid cannot To meet customer requirements

Method used

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  • Citric acid discoloration incrustation cleaning agent and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) Preparation of citric acid, ammonium chloride, disodium edetate, sodium dodecylbenzenesulfonate, and hexamethylenetetramine are dissolved in water to form a mixed solution, wherein the mass concentration of citric acid is 16%, the mass concentration of ammonium chloride is 1.6%, the mass concentration of edetate disodium salt is 0.03%, the mass concentration of sodium dodecylbenzenesulfonate is 0.004%, the mass concentration of hexamethylenetetramine The mass concentration is 0.5%.

[0035] (2) Prepare bromocresol violet solution, dissolve 0.10 g of bromocresol violet in 9.25 ml, 0.02 mol / L sodium hydroxide solution, and dilute to 250 ml with water.

[0036] (3) Mix the solution obtained in step (1) with the solution obtained in step (2) at a volume ratio of 1000:1, and the resulting mixed solution is a discoloration scale cleaning agent.

[0037] This cleaning agent reacts with calcium carbonate, until the cleaning agent changes from orange to purple, the amount o...

Embodiment 2

[0040] (1) Prepare citric acid, ammonium chloride, ethylenediaminetetraacetic acid disodium salt, sodium dodecylbenzenesulfonate, and hexamethylenetetramine and dissolve them in water to form a mixed solution, wherein the mass concentration of citric acid 20%, the mass concentration of ammonium chloride is 1.6%, the mass concentration of ethylenediaminetetraacetic acid disodium salt is 0.03%, the mass concentration of sodium dodecylbenzenesulfonate is 0.004%, hexamethylenetetramine The mass concentration is 0.5%.

[0041] (2) Prepare bromocresol violet solution, dissolve 0.10 g of bromocresol violet in 9.25 ml, 0.02 mol / L sodium hydroxide solution, and dilute to 250 ml.

[0042] (3) Mix the solution obtained in step (1) with the solution obtained in step (2) at a volume ratio of 1000:1, and the resulting mixed solution is a discoloration scale cleaning agent.

[0043] This cleaning agent reacts with calcium carbonate, until the cleaning agent changes from orange to purple, th...

Embodiment 3

[0046] (1) Prepare citric acid, ammonium chloride, ethylenediaminetetraacetic acid disodium salt, sodium dodecylbenzenesulfonate, and hexamethylenetetramine and dissolve them in water to form a mixed solution, wherein the mass concentration of citric acid 16%, the mass concentration of ammonium chloride is 1.8%, the mass concentration of disodium edetate is 0.03%, the mass concentration of sodium dodecylbenzenesulfonate is 0.004%, hexamethylenetetramine The mass concentration is 0.5%.

[0047] (2) Prepare bromocresol violet solution, dissolve 0.10 g of bromocresol violet in 9.25 ml, 0.02 mol / L sodium hydroxide solution, and dilute to 250 ml.

[0048] (3) Mix the solution obtained in step (1) with the solution obtained in step (2) at a volume ratio of 1000:1, and the resulting mixed solution is a discoloration scale cleaning agent.

[0049] This cleaning agent reacts with calcium carbonate, until the cleaning agent changes from orange to purple, the amount of calcium carbonate d...

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Abstract

The invention relates to a citric acid discoloration incrustation cleaning agent and a preparation method and application thereof. The cleaning agent is prepared from the following components in massconcentration: 15%-25% of organic acid, 1.6%-2.0% of ammonium salt, 0.03%-0.05% of ethylenediamine tetraacetic acid salt, 0.003%-0.005% of a surfactant, 0.4%-0.7% of a corrosion inhibitor and 0.00003%-0.00005% of an indicator. The cleaning agent is applied to removing incrustation of boilers, cooling towers or circulating water pipelines, and when effective components of the cleaning agent are consumed, the cleaning agent can be turned into purple from orange to indicate that the cleaning agent fails. Compared with the cleaning agents in the prior art, the cleaning agent has the advantages oflow corrosion to equipment, high cleaning capacity, safety, no pollution, low maintenance cost and the like.

Description

technical field [0001] The invention relates to industrial water treatment technology, in particular to a citric acid discoloration scale cleaning agent and its preparation method and application. Background technique [0002] Due to the presence of calcium and magnesium ions and other impurities in tap water, after a long period of use, a relatively thick layer of scale will form on the inner surface of metal devices or pipelines. Especially in some areas with relatively high water hardness, the concentration of calcium and magnesium ions will be higher. Scale has a very serious impact on industrial production, especially the pipelines, boilers and heat exchangers that transport water. Scale will hinder heat conduction and reduce thermal efficiency. It is greatly reduced, and also affects the quality of distilled water produced. At the same time, the existence of a large amount of scale may also cause local overheating of the equipment during the heating process and cause d...

Claims

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Application Information

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IPC IPC(8): C11D10/02
CPCC11D1/22C11D3/044C11D3/046C11D3/2086C11D3/28C11D3/33C11D3/3481
Inventor 王根礼
Owner SHANGHAI INST OF TECH
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