CN111850588A - Heavy oil degreasing agent for cold-rolled sheet and preparation method thereof - Google Patents
Heavy oil degreasing agent for cold-rolled sheet and preparation method thereof Download PDFInfo
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- CN111850588A CN111850588A CN202010829692.6A CN202010829692A CN111850588A CN 111850588 A CN111850588 A CN 111850588A CN 202010829692 A CN202010829692 A CN 202010829692A CN 111850588 A CN111850588 A CN 111850588A
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G5/00—Cleaning or de-greasing metallic material by other methods; Apparatus for cleaning or de-greasing metallic material with organic solvents
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- Detergent Compositions (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
The invention discloses a heavy oil degreasing agent for cold-rolled sheets, which takes water as a solvent, and is added with an alkalinity regulator, a chelating agent, an alkaline buffer agent, a complexing agent, a solubilizer, a nonionic surfactant, a defoaming agent and an alkaline dispersant, wherein the weight percentage of the degreasing agent is as follows: 5-20% of alkalinity regulator, 2-15% of chelating agent, 8-25% of alkaline buffer agent, 2-15% of complexing agent, 1-10% of solubilizer, 1-10% of nonionic surfactant, 0.2-3% of defoaming agent, 0.5-6% of alkaline dispersant and the balance of water. The invention can rapidly disperse oil stains, and the surface of the steel plate is clean, so that heavy oil stains of manufacturers can be cleaned.
Description
Technical Field
The invention relates to the technical field of degreasing agents, in particular to a heavy oil degreasing agent for a cold-rolled sheet and a preparation method thereof.
Background
The cold-rolled sheet needs to be chemically and electrolytically degreased before galvanization, and most manufacturers select cheap rolling oil or animal and vegetable oil to save rolling cost, so that oil stains and iron powder on the surface after rolling are particularly serious, and the oil stains on the surface cannot be thoroughly cleaned by using a conventional cleaning agent, so that the galvanized sheet has poor quality, and the conditions of dezincification, plating leakage and the like occur. Therefore, in order to meet the market requirements, a heavy oil degreasing agent for cold-rolled sheets is urgently needed to be found, and the heavy oil degreasing agent can rapidly disperse oil stains and remove iron powder, so that the surfaces of steel sheets are smooth and clean, and heavy oil stains of manufacturers can be cleaned.
Disclosure of Invention
In view of the above, the present invention provides a heavy oil degreasing agent for cold-rolled sheets, which can rapidly disperse oil stains and make the surface of a steel sheet smooth, and a preparation method thereof.
In order to achieve the purpose, the invention provides the following technical scheme: a heavy oil degreasing agent for cold-rolled sheets takes water as a solvent, and is added with an alkalinity regulator, a chelating agent, an alkaline buffer agent, a complexing agent, a solubilizer, a nonionic surfactant, a defoaming agent and an alkaline dispersant, and the weight percentage of the degreasing agent is as follows: 5-20% of alkalinity regulator, 2-15% of chelating agent, 8-25% of alkaline buffer agent, 2-15% of complexing agent, 1-10% of solubilizer, 1-10% of nonionic surfactant, 0.2-3% of defoaming agent, 0.5-6% of alkaline dispersant and the balance of water.
Further, the alkalinity regulator is potassium hydroxide, the chelating agent is potassium pyrophosphate, the alkaline buffer is sodium metasilicate pentahydrate, the complexing agent is sodium gluconate, the solubilizer comprises polysorbate and polyoxyethylene fatty acid ester, the nonionic surfactant is isomeric tridecanol, isomeric alcohol ether and diethylene glycol methyl ether, the defoamer is a polyether defoamer, and the alkaline dispersant is nitrilotriacetic acid.
Further, the ratio of isomeric tridecanol, isomeric alcohol ether and diethylene glycol methyl ether in the nonionic surfactant is 3:2:1, and the ratio of polysorbate in the solubilizer to polyoxyethylene fatty acid ester is 3: 1.
Further, the water is pure water.
By adopting the scheme, the potassium hydroxide can provide a relatively stable alkaline environment, the problem that the alkalinity is reduced too fast in the using process is solved, meanwhile, the permeability of potassium salt to cleaning is higher than that of other salts, so that the degreasing agent can better permeate into grease through the potassium hydroxide, and the potassium pyrophosphate can generate chelation with alkaline earth metal and heavy metal ions; can form a stable complex with Ca2+ and Mg2+ in hard water, thereby softening the hard water, improving the washing capacity and removing dirt; a layer of protective film can be formed on the surface of metal such as iron, lead, zinc, aluminum and the like; pyrophosphate ion (P2O74-) has strong dispersibility for finely dispersed solid, and can promoteUniformly mixing fine and trace substances; the potassium pyrophosphate with high complexing force (more pyrophosphate ions) has stable pH buffering capacity, can keep the pH value of the solution for a long time, and reduces the addition amount of the potassium pyrophosphate; sodium metasilicate pentahydrate can provide excellent buffering alkalinity, provide corrosion protection for light metals (aluminum, zinc and the like), have a protection effect on glassware and porcelain, and have the performances of suspending and emulsifying dirt, softening water and the like; the sodium gluconate has strong scale inhibition capacity: has strong complexation ability on calcium, magnesium and iron salts, so the scale inhibition ability is strong, especially on Fe3+Has excellent chelating action even within the full pH range (against Fe at full pH)3+All have chelation); the dissolving amount of the surfactant in the alkali solution can be increased to the maximum extent in a certain alkalinity environment (pH value of 8-10) by the polysorbates and the polyoxyethylene fatty acid esters; the mixture of isomeric tridecanol, isomeric alcohol ether and diethylene glycol methyl ether is used for cleaning heavy oil, can achieve the purpose of quickly emulsifying oil stain, is more environment-friendly compared with other emulsifiers, and is easier to control foam; the polyether defoaming agent can effectively control foam brought by the emulsifier, is not easy to lose efficacy in an alkaline environment, and has good compatibility; the nitrilotriacetic acid can improve the decontamination capability by more than 30 percent.
The invention also discloses a preparation method of the heavy oil degreasing agent for the cold-rolled sheet, which comprises the following steps:
s1, weighing a certain amount of water and putting the water into a stirring tank;
s2, sequentially adding weighed potassium hydroxide, potassium pyrophosphate, sodium metasilicate pentahydrate and sodium gluconate, and stirring until the potassium hydroxide, the potassium pyrophosphate, the sodium metasilicate pentahydrate and the sodium gluconate are completely dissolved;
s3, adding polysorbate and polyoxyethylene fatty acid ester, and stirring for 10 minutes;
and S4, finally adding isomeric tridecanol, isomeric alcohol ether, diethylene glycol methyl ether, a polyether defoamer and nitrilotriacetic acid respectively, and stirring for 20 minutes.
Compared with the prior art, the invention has the beneficial effects that:
by adopting the scheme, corrosive substances such as strong acid, strong alkali and the like are not contained, the preparation process is normal temperature, the use process is also normal temperature, cheap mineral oil, animal and vegetable oil and the like can be removed in the use process, the surface of a processed cold-rolled plate is smooth and clean, the residual oil and residual iron are lower than 20mg/m2, and further the comprehensive performance of the metal surface is improved (the comprehensive performance refers to that the post-processing performance and the coating performance are enhanced after the surface is clean).
Detailed Description
The present invention is further described with reference to specific examples to enable those skilled in the art to better understand the present invention and to practice the same, but the examples are not intended to limit the present invention.
Meanwhile, the invention is further explained below with reference to specific examples,
in preferred embodiment 1, a heavy oil degreasing agent for cold-rolled sheets uses water as a solvent, and potassium hydroxide, potassium pyrophosphate, sodium metasilicate pentahydrate, sodium gluconate, polysorbates, polyoxyethylene fatty acid esters, isomeric tridecanol, isomeric alcohol ethers, diethylene glycol methyl ether, polyether defoamer, and nitrilotriacetic acid are added, wherein the weight percentages of the degreasing agent are as follows: 5% of potassium hydroxide, 2% of potassium pyrophosphate, 8% of sodium metasilicate pentahydrate, 2% of sodium gluconate, 0.9% of polysorbates, 0.3% of polyoxyethylene fatty acid ester, 0.6% of isomeric tridecanol, 0.4% of isomeric alcohol ether, 0.2% of diethylene glycol methyl ether, 0.2% of polyether defoamer, 0.5% of nitrilotriacetic acid and the balance of water.
In preferred embodiment 2, a heavy oil degreasing agent for cold-rolled sheets uses water as a solvent, and potassium hydroxide, potassium pyrophosphate, sodium metasilicate pentahydrate, sodium gluconate, polysorbates, polyoxyethylene fatty acid esters, isomeric tridecanol, isomeric alcohol ethers, diethylene glycol methyl ether, polyether defoamer, and nitrilotriacetic acid are added, wherein the weight percentages of the degreasing agent are as follows: 10% of potassium hydroxide, 5% of potassium pyrophosphate, 15% of sodium metasilicate pentahydrate, 5% of sodium gluconate, 1.5% of polysorbates, 0.5% of polyoxyethylene fatty acid esters, 1.2% of isomeric tridecanol, 0.8% of isomeric alcohol ethers, 0.4% of diethylene glycol methyl ether, 0.8% of polyether antifoaming agents, 1% of nitrilotriacetic acid and the balance of water.
In preferred embodiment 3, a heavy oil degreasing agent for cold-rolled sheets uses water as a solvent, and potassium hydroxide, potassium pyrophosphate, sodium metasilicate pentahydrate, sodium gluconate, polysorbates, polyoxyethylene fatty acid esters, isomeric tridecanol, isomeric alcohol ethers, diethylene glycol methyl ether, polyether defoamer, and nitrilotriacetic acid are added, wherein the weight percentages of the degreasing agent are as follows: 7% of potassium hydroxide, 6% of potassium pyrophosphate, 16% of sodium metasilicate pentahydrate, 6% of sodium gluconate, 3% of polysorbates, 1% of polyoxyethylene fatty acid esters, 1.5% of isomeric tridecanol, 1% of isomeric alcohol ethers, 0.5% of diethylene glycol methyl ether, 1% of polyether antifoaming agents, 2% of nitrilotriacetic acid and the balance of water.
In preferred embodiment 4, a heavy oil degreasing agent for cold-rolled sheet uses water as a solvent, and potassium hydroxide, potassium pyrophosphate, sodium metasilicate pentahydrate, sodium gluconate, polysorbates, polyoxyethylene fatty acid esters, isomeric tridecanol, isomeric alcohol ethers, diethylene glycol methyl ether, polyether defoamer, and nitrilotriacetic acid are added, wherein the weight percentages of the degreasing agent are as follows: 10% of potassium hydroxide, 5% of potassium pyrophosphate, 15% of sodium metasilicate pentahydrate, 5% of sodium gluconate, 2.1% of polysorbates, 0.7% of polyoxyethylene fatty acid esters, 2.1% of isomeric tridecanol, 1.4% of isomeric alcohol ethers, 0.7% of diethylene glycol methyl ether, 1.5% of polyether defoaming agent, 4% of nitrilotriacetic acid and the balance of water.
In preferred embodiment 5, a heavy oil degreasing agent for cold-rolled sheets is prepared by using water as a solvent, and adding potassium hydroxide, potassium pyrophosphate, sodium metasilicate pentahydrate, sodium gluconate, polysorbates, polyoxyethylene fatty acid esters, isotridecanol, isotopolyether, diethylene glycol methyl ether, a polyether defoamer, and nitrilotriacetic acid, in percentage by weight: 12% of potassium hydroxide, 10% of potassium pyrophosphate, 18% of sodium metasilicate pentahydrate, 12% of sodium gluconate, 6% of polysorbates, 2% of polyoxyethylene fatty acid esters, 1% of isomeric tridecanol, 1% of isomeric alcohol ethers, 1% of diethylene glycol methyl ether, 1.5% of polyether antifoaming agents, 3% of nitrilotriacetic acid and the balance of water.
In preferred embodiment 6, a heavy oil degreasing agent for cold-rolled sheet, which uses water as a solvent, and adds potassium hydroxide, potassium pyrophosphate, sodium metasilicate pentahydrate, sodium gluconate, polysorbates, polyoxyethylene fatty acid esters, iso-tridecanol, iso-alcohol ethers, diethylene glycol methyl ether, polyether defoamer, and nitrilotriacetic acid, and the weight percentages are: 20% of potassium hydroxide, 15% of potassium pyrophosphate, 25% of sodium metasilicate pentahydrate, 15% of sodium gluconate, 7.5% of polysorbates, 2.5% of polyoxyethylene fatty acid esters, 4.5% of isomeric tridecanol, 3% of isomeric alcohol ether, 1.5% of diethylene glycol methyl ether, 3% of polyether defoaming agent, 6% of nitrilotriacetic acid and the balance of water.
Example 7: the invention also discloses a preparation method of the heavy oil degreasing agent for the cold-rolled sheet, which comprises the following steps:
s1, weighing a certain amount of water and putting the water into a stirring tank; weighing the water according to the ratio of any of examples 1-6;
s2, sequentially adding weighed potassium hydroxide, potassium pyrophosphate, sodium metasilicate pentahydrate and sodium gluconate, and stirring until the potassium hydroxide, the potassium pyrophosphate, the sodium metasilicate pentahydrate and the sodium gluconate are completely dissolved; the term "completely dissolved" as used herein means that no solute is visible in the solvent, i.e., potassium hydroxide, potassium pyrophosphate, sodium metasilicate pentahydrate, and sodium gluconate are dissolved in water. Stirring for 10-20 min.
S3, adding the polysorbate and the polyoxyethylene fatty acid ester, and stirring for 10-20 minutes;
and S4, finally adding isomeric tridecanol, isomeric alcohol ether, diethylene glycol methyl ether, a polyether defoamer and nitrilotriacetic acid respectively, and stirring for 20-30 minutes.
The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. The equivalent substitution or change made by the technical personnel in the technical field on the basis of the invention is all within the protection scope of the invention. The protection scope of the invention is subject to the claims.
Claims (5)
1. The heavy oil degreasing agent for the cold-rolled sheet is characterized by comprising the following components in parts by weight: water is used as a solvent, and an alkalinity regulator, a chelating agent, an alkaline buffer, a complexing agent, a solubilizer, a nonionic surfactant, a defoaming agent and an alkaline dispersant are added, wherein the weight percentage of the components is as follows: 5-20% of alkalinity regulator, 2-15% of chelating agent, 8-25% of alkaline buffer agent, 2-15% of complexing agent, 1-10% of solubilizer, 1-10% of nonionic surfactant, 0.2-3% of defoaming agent, 0.5-6% of alkaline dispersant and the balance of water.
2. The heavy oil degreasing agent for cold-rolled sheets according to claim 1, wherein the degreasing agent comprises: the alkalinity regulator is potassium hydroxide, the chelating agent is potassium pyrophosphate, the alkaline buffer agent is sodium metasilicate pentahydrate, the complexing agent is sodium gluconate, the solubilizer comprises polysorbate and polyoxyethylene fatty acid ester, the nonionic surfactant is isomeric tridecanol, isomeric alcohol ether and diethylene glycol methyl ether, the defoaming agent is a polyether defoaming agent, and the alkaline dispersant agent is nitrilotriacetic acid.
3. The heavy oil degreasing agent for cold-rolled sheets according to claim 2, wherein the degreasing agent comprises: the proportion of isomeric tridecanol, isomeric alcohol ether and diethylene glycol methyl ether in the nonionic surfactant is 3:2:1, and the proportion of polysorbate and polyoxyethylene fatty acid ester in the solubilizer is 3: 1.
4. The heavy oil degreasing agent for cold-rolled sheets according to claim 1, wherein the degreasing agent comprises: the water is pure water.
5. The method for preparing the heavy oil degreasing agent for the cold-rolled sheet according to any one of claims 1 to 4, wherein the method comprises the following steps: the method comprises the following steps:
s1, weighing a certain amount of water and putting the water into a stirring tank;
s2, sequentially adding weighed potassium hydroxide, potassium pyrophosphate, sodium metasilicate pentahydrate and sodium gluconate, and stirring until the potassium hydroxide, the potassium pyrophosphate, the sodium metasilicate pentahydrate and the sodium gluconate are completely dissolved;
s3, adding polysorbate and polyoxyethylene fatty acid ester, and stirring for 10 minutes;
and S4, finally adding isomeric tridecanol, isomeric alcohol ether, diethylene glycol methyl ether, a polyether defoamer and nitrilotriacetic acid respectively, and stirring for 20 minutes.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010829692.6A CN111850588A (en) | 2020-08-18 | 2020-08-18 | Heavy oil degreasing agent for cold-rolled sheet and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010829692.6A CN111850588A (en) | 2020-08-18 | 2020-08-18 | Heavy oil degreasing agent for cold-rolled sheet and preparation method thereof |
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Cited By (2)
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| CN113502479A (en) * | 2021-07-15 | 2021-10-15 | 南京科润工业介质股份有限公司 | Non-phosphorus water-based degumming and degreasing agent |
| CN114457328A (en) * | 2021-12-27 | 2022-05-10 | 湖北安登环保科技有限公司 | Process method of aluminum alloy spraying section bar pretreatment environment-friendly passivation system |
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Application publication date: 20201030 |