Detergent as well as preparation method and application thereof

A technology of cleaning agent and fatty acid methyl ester, which is applied in the field of cleaning agent and its preparation and application. It can solve the problems of high corrosion, easy to form dirt, and incapable of equipment circulation, so as to improve the ability of shedding carbon deposits and prevent secondary contamination of dirt. Precipitation, increase the effect of osmotic function

Inactive Publication Date: 2013-09-18
SHANGHAI INST OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Disadvantages of pickling: ①It is relatively corrosive, and it will cause great damage to the spare parts of the equipment; ②It cannot circulate in the equipment, nor can it remain in the equipment for a long time , it is necessary to disassemble the accessories of each unit when cleaning; ③ release toxic gas, which will cause harm to the human body during cleaning
[0005] All kinds of mechanical cleaning have certain disadvantages ① high-pressure water gun jet cleaning, the disadvantages are: A. Shutdown, disassembly, long construction period, B needs to be transferred, there are hidden dangers in operation, C High cleaning costs
②Insert cleaning, the disadvantages are: A forms a swirling flow, B is very easy to damage the boundary layer and anti-corrosion coating, C surface damage will increase the resistance, and it is easier to form dirt
3. Ultrasonic cleaning, the disadvantages are: ①The equipment is expensive, ②When destroying insoluble pollutants, it is easy to cause scratches on the equipment

Method used

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  • Detergent as well as preparation method and application thereof
  • Detergent as well as preparation method and application thereof
  • Detergent as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A cleaning agent, calculated by weight percentage, its raw material composition and content are as follows:

[0032] Fatty acid methyl esters 95%

[0033] Polycarboxylate 2%

[0034] Polyoxyethylene ether 3%;

[0035] The fatty acid methyl ester is a long-chain fatty acid methyl ester;

[0036] The long-chain fatty acid methyl ester is lauryl fatty acid methyl ester, that is, the carbon chain of fatty acid is at 12;

[0037] Described polycarboxylic acid molecular structural formula is as follows:

[0038]

[0039] Among them, a=1, b=10, c=0;

[0040] The polyoxyethylene ether is fatty alcohol polyoxyethylene (7) ether.

[0041] The preparation method of above-mentioned a kind of cleaning agent, step is as follows:

[0042] At room temperature, add polycarboxylic acid and fatty alcohol polyoxyethylene (7) ether into lauryl fatty acid methyl ester, stir evenly, and pack it in a can to obtain a cleaning agent.

Embodiment 2

[0044] A cleaning agent, calculated by weight percentage, its raw material composition and content are as follows:

[0045] Fatty acid methyl ester 99.6%

[0046] Polycarboxylate 0.2%

[0047] Polyoxyethylene ether 0.2%;

[0048] Described fatty acid methyl ester is epoxy fatty acid methyl ester;

[0049] The epoxy fatty acid methyl ester is epoxy octadecyl fatty acid methyl ester, that is, the carbon chain of the fatty acid is at 18;

[0050] Described polycarboxylic acid molecular structural formula is as follows:

[0051]

[0052] Among them, a=1, b=8, c=1;

[0053] The polyoxyethylene ether is fatty alcohol polyoxyethylene (9) ether.

[0054] The preparation method of above-mentioned a kind of cleaning agent, step is as follows:

[0055] At room temperature, add polycarboxylic acid and fatty alcohol polyoxyethylene (9) ether into epoxy octadecyl fatty acid methyl ester, stir evenly, and pack it in a can to obtain a cleaning agent.

Embodiment 3

[0057] A cleaning agent, calculated by weight percentage, its raw material composition and content are as follows:

[0058] Fatty acid methyl esters 95%

[0059] Polycarboxylate 2%

[0060] Polyoxyethylene ether 3%;

[0061] The fatty acid methyl ester is formed by compounding epoxy fatty acid methyl ester and long-chain fatty acid methyl ester in a weight ratio of epoxy fatty acid methyl ester: long-chain fatty acid methyl ester in a ratio of 40:55;

[0062] The epoxy fatty acid methyl ester is epoxy pentacyl fatty acid methyl ester, that is, the carbon chain of the fatty acid is at 25;

[0063] The long-chain fatty acid methyl ester is hexadecyl fatty acid methyl ester, that is, the carbon chain of the fatty acid is at 16;

[0064] Described polycarboxylic acid molecular structural formula is as follows:

[0065]

[0066] Among them, a=2, b=5, c=1;

[0067] The polyoxyethylene ether is fatty alcohol polyoxyethylene (15) ether.

[0068] The preparation method of abov...

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PUM

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Abstract

The invention discloses a detergent as well as a preparation method and an application thereof. The detergent comprises the following components in percentage by weight: 90-99.6% of fatty acid methyl ester, 0.2-4% of polycarboxylic acid and 0.2-6% of polyoxyethylene ether. The preparation method comprises the step: uniformly stirring and mixing fatty acid methyl ester, polycarboxylic acid and polyoxyethylene ether to obtain the detergent. The detergent disclosed by the invention is used for cleaning heavy oil dirt and deposited carbon in compressors or industrial pipelines. The detergent disclosed by the invention is strong in detergency, fast in deposited carbon removal speed and free from equipment corrosion, and has the effect of environment friendliness, safety and resource saving.

Description

technical field [0001] The invention relates to a cleaning agent, its preparation method and its application in cleaning heavy oil dirt and carbon deposits in industrial pipelines or compressors. Background technique [0002] The main component of heavy oil dirt and carbon deposits is colloid, which is closely combined with metal, and it is difficult to be removed by general solvents. Industrial pipe cleaning has always been an important part of the industrial energy conservation and environmental protection industry, and plays an important role in guaranteeing the implementation of the national low-carbon energy-saving policy. During the operation of industrial pipelines, there is a common problem of fouling deposition, which is very harmful. With the thickening of the scale layer, the thermal resistance of the scale layer will become the main factor affecting the heat transfer rate, which will reduce the efficiency of the equipment; serious scaling hazards will lead to sh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11D7/60C11D7/52B08B9/02
Inventor 欧阳春发李晓红
Owner SHANGHAI INST OF TECH
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