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Foamless low temperature degreasing agent

A low-temperature degreasing and fat technology, which is applied in the chemical industry, can solve the problems of wasting the fuel required for heating, polluting the air environment, taking away the degreasing agent, etc., and achieves the effects of good application prospect, simple preparation method, and reduced production energy consumption.

Inactive Publication Date: 2009-07-08
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the degreasing agent used in China can only achieve good results when used at a higher temperature (75-85 ° C), and a large number of air bubbles are generated during operation, which has the following defects: (1) the use temperature is higher, then The heat required for heating is large, the energy consumption is large, the fuel required for heating is wasted, and the air environment is polluted; (2) Bubbles generated during use will take away part of the degreasing agent, resulting in waste of degreasing agent; (3) The use process A large number of air bubbles are generated in the air, which makes the working environment on site worse
[0004] Most of the degreasing agents widely used in iron and steel enterprises are high-temperature type (75-85°C), and more than 90% are imported from abroad, which are expensive; there is an urgent need to develop a low-temperature degreasing agent to meet the requirements of industrial production

Method used

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  • Foamless low temperature degreasing agent
  • Foamless low temperature degreasing agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Add sodium hydroxide to water, stir until the sodium hydroxide solid is completely dissolved, add EDTA and stir until the EDTA is completely dissolved, and obtain an alkaline solution; add polyethylene glycol to water, stir until the polyethylene glycol is completely dissolved, and obtain an alcohol Solution, mix alcohol solution and alkaline solution evenly, add nonylphenol polyoxyethylene ether, fatty alcohol polyoxyethylene ether, fatty alcohol polyoxyethylene ether penetrating agent and silicone defoamer, then add water and stir to mix evenly , to obtain a non-foaming low-temperature degreasing agent. The total amount of each component added by weight percentage is 20% sodium hydroxide, 0.5% nonylphenol polyoxyethylene ether, 0.5% fatty alcohol polyoxyethylene ether, 0.1% polyethylene glycol, and disodium edetate 0.5%, silicone defoamer 0.5%, fatty alcohol polyoxyethylene ether penetrating agent 0.5%; the amount of water in the alkaline solution is based on the abil...

Embodiment 2

[0038] The preparation method of the non-foaming low-temperature degreasing agent is the same as that of Example 1, except that the total amount of each component added is 3% by weight of sodium hydroxide, 0.1% of nonylphenol polyoxyethylene ether, and 0.1% of fatty alcohol polyoxyethylene ether. , 0.05% polyethylene glycol, 0.2% disodium edetate, 0.1% silicone defoamer, 0.1% fatty alcohol polyoxyethylene ether penetrating agent; 96.35%.

[0039] Place the non-foaming low-temperature degreasing agent in a constant temperature water bath, heat it to 70°C, soak the steel plate to be cleaned in the non-foaming low-temperature degreasing agent for 20 seconds, and no bubbles are generated during the treatment; then take out the steel plate and quickly deionize it with Rinse with water and scrub the steel plate with a brush at the same time. The contact angle of the steel plate after cleaning was 13°. The treated steel plate as figure 2 shown in f.

[0040] The degreasing agent c...

Embodiment 3

[0042] The preparation method of the non-foaming low-temperature degreasing agent is the same as in Example 1, except that the total amount of each component added is 16% by weight of sodium hydroxide, 0.2% of nonylphenol polyoxyethylene ether, and 0.4% of fatty alcohol polyoxyethylene ether. , 0.08% polyethylene glycol, 0.4% EDTA disodium salt, 0.2% silicone defoamer, 0.3% fatty alcohol polyoxyethylene ether penetrating agent; 82.42%.

[0043] Place the non-foaming low-temperature degreasing agent in a constant temperature water bath, heat it to 60°C, soak the steel plate to be cleaned in the non-foaming low-temperature degreasing agent for 20 seconds, and no bubbles are generated during the treatment; then take out the steel plate and quickly deionize it with Rinse with water and scrub the steel plate with a brush at the same time. The contact angle of the steel plate after cleaning was 13°. The treated steel plate as figure 2 g shown.

[0044] The degreasing agent comm...

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Abstract

The invention provides a non-foaming low-temperature degreasant which belongs to the chemical technique field. The non-foaming low-temperature degreasant is prepared from components by weight percentage as follows: water 77.4-96.35%, sodium hydroxide 3-20%, polyoxyethylene nonyl phenyl ether 0.1-0.5%, fatty alcohd-polyoxyethlene ether 0.1-0.5%, carmowax 0.05-0.1%, disodium EDTA 0.2-0.5%, silicone antifoam agent 0.1-0.5%, fatty alcohol polyethenoxy ether type osmotic agent 0.1-0.5%. The non-foaming low-temperature degreasant has advantages of better oil removing effect, low use temperature, and simple preparing method. The non-foaming low-temperature degreasant has better application prospect.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, in particular to a foam-free low-temperature degreasing agent. Background technique [0002] In the steel rolling process, in order to wash off the oil on the surface of the steel plate, degreasing agents are widely used to enhance the degreasing effect. At present, the degreasing agent used in China can only achieve good results when used at a higher temperature (75-85 ° C), and a large number of air bubbles are generated during operation, which has the following defects: (1) the use temperature is higher, then The heat required for heating is large, the energy consumption is large, the fuel required for heating is wasted, and the air environment is polluted; (2) Bubbles generated during use will take away part of the degreasing agent, resulting in waste of degreasing agent; (3) The use process A large number of air bubbles generated in the process make the working environment on site...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23G5/032
Inventor 刘梅英王国栋苏永渤孙中强
Owner NORTHEASTERN UNIV
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