Concentrated liquid degreasing agent for silicon steel continuous annealing production line and preparation method thereof

A production line and degreaser technology, applied in the field of concentrated liquid degreaser and its preparation, can solve the problems of reduced cleaning cost, poor cleaning effect, large amount of foam, etc., and achieve the effects of cost saving, good cleaning effect and strong saponification ability

Active Publication Date: 2018-04-20
马鞍山市恺鸾鑫实业有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The object of the present invention is to overcome the deficiencies in the prior art that the degreasing agent has a large amount of foam when cleaning, the cleaning effect is poor, and it is easy to cause pollution, and provides a concentrated liquid degreasing agent used in a silicon steel continuous annealing production line and a preparation method thereof. The technical solution of the invention is to solubilize the nonionic surfactant in the high-alkaline concentrated solution through the environment-friendly surfactant (alcohol ether glucoside, carboxylic anhydride) and the amphoteric surfactant, and to use polyacrylic acid sodium salt, etc. for various Scatter dirt, etc., to avoid dirt from adhering to the steel strip after cleaning, low foam, little pollution, and reduced cleaning costs

Method used

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  • Concentrated liquid degreasing agent for silicon steel continuous annealing production line and preparation method thereof
  • Concentrated liquid degreasing agent for silicon steel continuous annealing production line and preparation method thereof
  • Concentrated liquid degreasing agent for silicon steel continuous annealing production line and preparation method thereof

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preparation example Construction

[0038] A preparation method for a concentrated liquid degreasing agent used in a silicon steel continuous annealing production line, the steps of which are:

[0039] Step 1. Add sodium hydroxide to the pure water under the condition of uniform stirring, and the sodium hydroxide dissolves and releases heat;

[0040] Since the sodium hydroxide content reaches 20% to 35%, it will form concentrated lye after dissolution, which can improve its saponification ability and make it easier to remove grease.

[0041] Step 2. When the temperature of the solution reaches 50-80° C., add linear alkenyl dicarboxylic anhydride to the solution, and stir for 10-30 minutes to lower the temperature. Linear alkenyl dicarboxylic acid anhydride is easily soluble in hot alkaline solution, and has good solubility at a temperature of 50-80°C, and can be used as a solubilizer to improve the solubility of other substances; in addition, sufficient stirring can make the reaction proceed quickly, Accelerate...

Embodiment 1

[0046] The composition and percentage ratio of the concentrated liquid degreasing agent used in the silicon steel continuous annealing production line in this embodiment are:

[0047]

[0048]

[0049] Prepare the above materials, add pure water into the reactor equipped with thermometer, stirrer and dripping device, start stirring, then slowly add sodium hydroxide until it dissolves completely, and the sodium hydroxide releases a lot of heat when dissolving, making the The water temperature rises; when the water temperature reaches 60°C, add linear alkenyl dicarboxylic anhydride and stir for 10 minutes to dissolve it completely; when the temperature drops to 50°C, add sodium gluconate, polyacrylic acid sodium salt, and alcohol ether in sequence Glycosides and amphoteric surfactants, continue to stir for 60 minutes; finally cool down to 35°C, add isomeric alcohol ethers, EO / PO block polymers in sequence, and stir for 10 minutes to obtain the degreasing agent of the cost e...

Embodiment 2

[0052] The composition and percentage ratio of the concentrated liquid degreasing agent used in the silicon steel continuous annealing production line in this embodiment are:

[0053]

[0054] Prepare the above materials, add pure water into the reactor equipped with thermometer, stirrer and dripping device, start stirring, add sodium hydroxide in pure water to dissolve completely (exothermic when dissolving), and then add at 80°C Linear alkenyl dicarboxylic acid anhydride, stir for 20min; then cool down to 45°C, add sodium gluconate, polyacrylic acid sodium salt, alcohol ether glycoside, amphoteric surfactant in turn, continue stirring for 30min; finally cool down to 20°C, add iso Construct alcohol ether, EO / PO block polymer, stir 20min namely the degreasing agent of cost embodiment.

[0055] Among the raw materials of the degreasing agent, the linear alkenyl dicarboxylic anhydride is Genapur ASA from Clariant, the sodium polyacrylic acid salt is Sokalan PA30; the alcohol ...

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Abstract

The invention discloses a concentrated liquid degreasing agent used in a silicon steel continuous annealing production line and a preparation method thereof, belonging to the field of silicon steel degreasing and cleaning. The degreasing agent of the present invention is composed of the following substances: sodium hydroxide: 20% to 35%, linear alkenyl dicarboxylic anhydride: 0.5% to 1%, sodium gluconate: 1% to 5%, sodium polyacrylic acid: 1 %~5%, alcohol ether glycoside: 3%~10%, amphoteric surfactant: 0.5%~1.5%, isomeric alcohol ether: 0.5%~2.0%, EO / PO block polymer: 0.3%~1.0% , the balance is pure water, and various substances are prepared into a degreasing agent according to certain steps. When the degreasing agent prepared by the present invention is used in the continuous annealing production line of silicon steel, the consumption of the degreasing agent is low, the cleaning power is strong, and the foam is very little. It reduces the workload of operators, and does not contain pollutants such as phosphorus and sulfur, and has a good environmental protection effect.

Description

technical field [0001] The invention relates to the technical field of silicon steel degreasing and cleaning, in particular to a concentrated liquid degreasing agent used in a silicon steel continuous annealing production line and a preparation method thereof. Background technique [0002] During the cold rolling process of cold-rolled thin steel sheets such as cold-rolled silicon steel sheets, an emulsion composed of various oils (such as natural oils, synthetic oils, etc.) is usually used to lubricate and cool the rolled steel sheets. Therefore, this Grease lubricant will remain on the surface of the steel strip after the steel plate is rolled. Before annealing the steel plate, this layer of oil must be removed by chemical degreasing and electrolytic degreasing to prevent this layer of oil from carbonizing on the surface of the steel plate during annealing. Carburization and the formation of carbonaceous stains affect the performance and quality of the steel plate in the p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23G1/19
Inventor 高学频胡承亮张永海周浩戴恒陶李路
Owner 马鞍山市恺鸾鑫实业有限责任公司
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