Aluminothermy rough rolling emulsion and preparation method thereof
A lubricant composition for aluminum rolling using unsaturated fatty acids, ethanolamines, and boric acid forms stable compounds to address the trade-off of usage cycle and degradation, ensuring extended use and rapid breakdown without environmental harm.
Patent Information
- Application Number
- CN202510548119.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-28
- Publication Date
- 2025-07-15
AI Technical Summary
The use cycle of existing aluminum rolled emulsions is inversely proportional to the degradation efficiency. If the long service life is, the degradation speed will be slow. Frequent addition of fungicides will be polluted and the environment will be polluted. The emulsions are easily eroded by microorganisms and lead to problems such as corruption and oil analysis.
Aluminum hot crude rolled emulsion is prepared by heating and reacting in an inert gas to form characteristic substances with an emulsifier and an extremely pressure antiwear agent, combined with the antibacterial properties of boric acid.
It extends the use cycle of the emulsion, inhibits microbial erosion, moderate degradation speed, is environmentally friendly, phosphorus-free, sulfur-free, excellent lubricating performance, and good stability of the emulsion.
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Figure BDA0005381302630000061
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of lubricants, and particularly relates to an aluminothermic rough rolling emulsion and a preparation method thereof. Background Art
[0002] The commercial value of aluminum products depends on their surface quality (uniformity and smoothness), and the surface quality of aluminum products depends on the hot rolling stage. In particular, the rolling emulsion has almost a decisive influence on the surface quality of aluminum products.
[0003] For cost consideration, the service life of the emulsifier should be extended as much as possible to produce more aluminum materials. For environmental protection consideration, the waste emulsifier should be able to degrade quickly. However, in the prior art, the service life of the emulsion and its degradation efficiency are inversely proportional. The longer the service life, the slower the degradation rate.
[0004] The emulsion contains fatty oil and is easily eroded by microorganisms. These substances are decomposed by microorganisms, resulting in problems such as the destruction of emulsion balance, oil separation, and an increase in acid value. In production, it is mainly manifested as problems such as the appearance of putrid odors, a change in the color of the emulsion, a rapid drop in pH value, and the formation of sediment or sludge due to oil-water separation.
[0005] In the prior art, in order to extend the service life of the emulsion, the commonly used method is to add a bactericide. However, adding a bactericide to the emulsifier only has a one-time effect and needs to be added frequently. Moreover, the bactericide usually contains phosphorus and sulfur elements, which cause greater environmental pollution.
[0006] Therefore, it is necessary to develop a rolling emulsion with good antibacterial effect, emulsion stability, long service life, but also a relatively fast degradation rate. Summary of the Invention
[0007] To solve the above technical problems, the present invention provides an aluminothermic rough rolling emulsion and a preparation method thereof.
[0008] The technical solution adopted by this application for this technical problem is as follows:
[0009] An aluminothermic rough rolling emulsion, comprising 2wt%-5wt% rolling oil and 95wt%-98wt% aqueous phase. The rolling oil includes base oil, unsaturated fatty acid, ethanolamine compound, antioxidant, boric acid, and defoamer. The aqueous phase is an aqueous solution of boric acid.
[0010] Further, the raw materials of the rolling oil include 70wt% - 80wt% base oil, 14wt% - 18wt% unsaturated fatty acid, 4wt% - 6wt% ethanolamine compound, 1wt% - 2wt% boric acid, 0.5wt% - 1wt% antioxidant, and 0wt% - 0.5wt% defoamer. The balance is inevitable impurities.
[0011] Furthermore, the base oil contains pentaerythritol ester, and the pentaerythritol ester accounts for 20% to 35% of the weight of the base oil.
[0012] Furthermore, the unsaturated fatty acid is a monounsaturated fatty acid with 12 to 18 carbon atoms.
[0013] Furthermore, the ethanolamine compound is diethanolamine, triethanolamine, or a mixture of diethanolamine and triethanolamine.
[0014] Furthermore, by mass percentage, the mass percentage of boric acid in the aqueous boric acid solution is 0.3wt% - 0.5wt%.
[0015] A method for preparing an aluminothermic rough rolling emulsion for preparing the above aluminothermic rough rolling emulsion, comprising the following steps:
[0016] Step S1: Preparation of rolling oil:
[0017] Step S11: Add unsaturated fatty acid to a container in an inert gas and heat to 70 - 75°C;
[0018] Step S12: Add half of the ethanolamine compound to the container in Step S1, raise the temperature to 130°C under stirring, and keep warm for 1 - 2 hours;
[0019] Step S13: Add boric acid to the container in Step S2, maintain the temperature in the container at 130 - 135°C, and keep warm for 1 - 2 hours;
[0020] Step S14: Heat the base oil to 120 - 125°C, then mix it with the materials in the container in Step S3 under stirring, add an antioxidant and an antifoaming agent, keep warm for 1 - 2 hours, and add the remaining ethanolamine compound and stir to cool down to below 40°C;
[0021] Step S2: Preparation of emulsion:
[0022] Take the mixture in Step S14, slowly add it to water at about 40°C, and disperse it into an emulsion at a stirring speed of 300 - 500 r / min.
[0023] During the reaction process, half of the ethanolamine compounds are consumed by unsaturated fatty acids to form unsaturated fatty acid ethanolamine substances. Ethanolamine compounds and boric acid are added. At a temperature of 130°C, a saponification reaction occurs between ethanolamine and unsaturated fatty acid ethanolamine substances. Ethanolamine, boric acid, and unsaturated fatty acid ethanolamine boric acid react at 130 - 135°C to form the characteristics of borate esters. This borate ester substance has the properties of an emulsifier and an extreme pressure anti-wear agent, has good heat resistance, can maintain good emulsifying performance at 50 - 60°C, can avoid bacterial growth at a relatively high temperature (50 - 60°C), and can extend the service life of the emulsion.
[0024] Further, in steps S12, S13, and S14, a certain amount of a water-carrying agent is added after the heat preservation ends, and the next step starts after the water-carrying agent has evaporated completely.
[0025] The water-carrying agent is an organic substance such as toluene or n-butanol that forms an azeotrope with water and does not react with the substances in the system.
[0026] Further, in steps S12, S13, and S14, the amount of the water-carrying agent is 3 to 5 times the weight of the ethanolamine compound.
[0027] Further, the use temperature of the emulsion is 50 - 60°C.
[0028] Compared with the prior art, the beneficial effects of the present invention are as follows:
[0029] 1. The present invention uses unsaturated fatty acids, ethanolamine compounds, and boric acid, and also causes reactions among them during the production process to synthesize effective components with functions such as emulsifiers and extreme pressure anti-wear agents. It can achieve the effects of a combination of multiple raw materials without the need for particularly many types of raw materials. It has good lubrication and annealing cleanliness, and all have emulsifying effects. It has good heat resistance in the emulsion, can adapt to a temperature of 50 - 60°C, thus using temperature for sterilization, eliminating the use of sulfur- and phosphorus-containing fungicides, and being environmentally friendly.
[0030] 2. The preparation method of the present invention enables unsaturated fatty acids, ethanolamine compounds, and boric acid to react with each other to form other products with special functions, achieving a state of mutual cooperation. It has good emulsifying effects, certain antibacterial properties, and can inhibit the accumulation of ethanolamine compounds in the emulsion, extending the service life of the rolling emulsion.
[0031] 3. Generally speaking, for an emulsion with a long service life, its degradation rate will inevitably be slow, while an emulsion with a fast degradation rate is prone to being affected by microorganisms during use and thus fails quickly. However, by making full use of the interaction between various combinations, the present invention has good emulsifying performance, can withstand relatively high use temperatures, and the relatively high use temperature can cooperate with the boric acid compound to have good antibacterial performance, so as to ensure that it will not be contaminated by microorganisms and go rancid during the service life. However, the waste emulsion has a faster degradation rate compared with the emulsion in the prior art due to the use of unsaturated fatty acids.
[0032] 4. A water-carrying agent is added during the preparation process of the present invention, making the reaction of each component in the rolling oil tend to be complete, thereby eliminating the solubility of high-content ethanolamine compounds in water, avoiding affecting the lubricating performance, and making the emulsifying effect, lubricating effect, and extreme pressure and anti-wear effect better in the formed emulsion, and the emulsion is more stable. Specific embodiments
[0033] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to specific embodiments.
[0034] Example 1:
[0035] A preparation method of an aluminothermic rough rolling emulsion includes the following steps:
[0036] Prepare rolling oil: Add 139 g of oleic acid to a four-necked flask in an inert gas and stir and heat to 70 - 75 °C; then add 34 g of triethanolamine to the container, raise the temperature to 130 °C under stirring, keep warm for 1.5 h, after the heat preservation ends, add 50 g of toluene and evaporate it. After the toluene evaporation ends, add 15 g of boric acid to the four-necked flask, maintain the temperature in the container at 130 - 135 °C, keep warm for 1.5 h, after the heat preservation ends, add 50 g of toluene and evaporate it until the toluene evaporation ends;
[0037] Add 568 g of No. 15 industrial white oil and 201 g of pentaerythritol ester to a 2000 mL beaker, heat it in a water bath to 125 °C, mix the materials in the beaker with the materials in the four-necked flask evenly under stirring, transfer them into a larger four-necked flask, add an antioxidant and an antifoaming agent, keep warm for 1.5 h, after the heat preservation ends, add 50 g of toluene and evaporate it until the toluene evaporation ends, add 32 g of triethanolamine and stir to cool down to below 40 °C, and filter to obtain the rolling oil;
[0038] Emulsion configuration: Take 300 g of the above rolling oil and slowly add it to a boric acid aqueous solution at about 40 °C. The weight of the boric acid aqueous solution is 29.7 kg, and the boric acid concentration in the boric acid aqueous solution is 0.2%. Disperse it into an emulsion at a stirring speed of 300 - 500 r / min.
[0039] Example 2:
[0040] A preparation method of an aluminothermic rough rolling emulsion, comprising the following steps:
[0041] Prepare rolling oil: Add 179 g of elaidic acid to a four-necked flask in an inert gas, stir and heat to 70 - 75 °C; then add 38 g of diethanolamine to the container, raise the temperature to 130 °C under stirring, keep warm for 1 h, after the heat preservation ends, add 55 g of toluene, and perform evaporation. After the toluene evaporation ends, add 19 g of boric acid to the four-necked flask, maintain the temperature in the container at 130 - 135 °C, keep warm for 2 h, after the heat preservation ends, add 55 g of toluene, and perform evaporation until the toluene evaporation ends;
[0042] Add 450 g of No. 26 industrial white oil and 263 g of pentaerythritol ester to a beaker with a capacity of 2000 mL, heat in a water bath to 125 °C, mix the materials in the beaker with the materials in the four-necked flask evenly under stirring, transfer to a larger four-necked flask, and add antioxidant and defoaming agent, keep warm for 2 h, after the heat preservation ends, add 55 g of toluene, and perform evaporation until the toluene evaporation ends, add 38 g of diethanolamine and stir to cool down to below 40 °C, and filter to obtain the rolling oil;
[0043] Emulsion preparation: Take 400 g of the above rolling oil and slowly add it to a boric acid aqueous solution at about 40 °C. The weight of the boric acid aqueous solution is 29.6 kg, and the concentration of boric acid in the boric acid aqueous solution is 0.5%. Disperse it into an emulsion at a stirring speed of 300 - 500 r / min.
[0044] Example 3:
[0045] A preparation method of an aluminothermic rough rolling emulsion, comprising the following steps:
[0046] Prepare rolling oil: Add 165 g of palmitoleic acid to a four-necked flask in an inert gas, stir and heat to 70 - 75 °C; then add 32 g of triethanolamine to the container, raise the temperature to 130 °C under stirring, keep warm for 1 h, after the heat preservation ends, add 55 g of toluene, and perform evaporation. After the toluene evaporation ends, add 13 g of boric acid to the four-necked flask, maintain the temperature in the container at 130 - 135 °C, keep warm for 1.5 h, after the heat preservation ends, add 55 g of toluene, and perform evaporation until the toluene evaporation ends;
[0047] Add 509 g of industrial white oil No. 36 and 234 g of pentaerythritol ester into a 2000 mL beaker, heat it in a water bath to 125 °C, mix the materials in the beaker with those in the four-necked flask evenly under stirring, transfer them into a larger four-necked flask, add antioxidant and defoamer, keep warm for 1.5 h, add 55 g of toluene after the heat preservation ends, evaporate until the toluene evaporation ends, add 32 g of diethanolamine and stir to cool down to below 40 °C, and filter to obtain rolling oil;
[0048] Emulsion preparation: Take 500 g of the above rolling oil and slowly add it into a boric acid aqueous solution at about 40 °C. The weight of the boric acid aqueous solution is 29.5 kg, and the boric acid concentration in the boric acid aqueous solution is 0.3%. Disperse it into an emulsion at a stirring speed of 300 - 500 r / min.
[0049] Comparative Example 1:
[0050] A preparation method of an aluminothermic rough rolling emulsion includes the following steps:
[0051] Prepare rolling oil: Add 179 g of oleic acid into a four-necked flask in an inert gas and stir and heat to 70 - 75 °C; then add 38 g of diethanolamine into the container, raise the temperature to 130 °C under stirring, keep warm for 1 h, add 55 g of toluene after the heat preservation ends, evaporate, and after the toluene evaporation ends, add 19 g of boric acid into the four-necked flask, maintain the temperature in the container at 130 - 135 °C, keep warm for 2 h, add 55 g of toluene after the heat preservation ends, and evaporate until the toluene evaporation ends;
[0052] Add 450 g of industrial white oil No. 36 and 263 g of pentaerythritol ester into a 2000 mL beaker, heat it in a water bath to 125 °C, mix the materials in the beaker with those in the four-necked flask evenly under stirring, transfer them into a larger four-necked flask, add antioxidant, keep warm for 2 h, add 55 g of toluene after the heat preservation ends, evaporate until the toluene evaporation ends, add 38 g of diethanolamine and stir to cool down to below 40 °C, and filter to obtain rolling oil;
[0053] Emulsion preparation: Take 400 g of the above rolling oil and slowly add it into 29.6 kg of water at about 40 °C. Disperse it into an emulsion at a stirring speed of 300 - 500 r / min.
[0054] Comparative Example 2:
[0055] A preparation method of an aluminothermic rough rolling emulsion includes the following steps:
[0056] Preparation of rolling oil: Add 162 g of stearic acid to a four-necked flask in an inert gas, stir and heat to 70 - 75 °C; then add 30 g of diethanolamine to the container, raise the temperature to 130 °C under stirring, keep warm for 2 h. After the heat preservation ends, add 50 g of toluene and evaporate. After the toluene evaporation ends, add 19 g of boric acid to the four-necked flask, maintain the temperature in the container at 130 - 135 °C, keep warm for 2 h. After the heat preservation ends, add 50 g of toluene and evaporate until the toluene evaporation ends;
[0057] Add 509 g of No. 36 industrial white oil and 234 g of pentaerythritol ester to a 2000 mL beaker, heat in a water bath to 125 °C, mix the materials in the beaker with the materials in the four-necked flask evenly under stirring, transfer to a larger four-necked flask, add antioxidant and defoamer, keep warm for 2 h. After the heat preservation ends, add 50 g of toluene and evaporate until the toluene evaporation ends. Add 30 g of diethanolamine and stir to cool down to below 40 °C, then filter to obtain the rolling oil;
[0058] Preparation of emulsion: Take 300 g of the above rolling oil and slowly add it to a boric acid aqueous solution at about 40 °C. The weight of the boric acid aqueous solution is 29.7 kg, and the boric acid concentration in the boric acid aqueous solution is 0.2%. Disperse it into an emulsion at a stirring speed of 300 - 500 r / min.
[0059] Comparative example three:
[0060] A preparation method of an aluminothermic rough rolling emulsion includes the following steps:
[0061] Preparation of rolling oil: Add 179 g of elaidic acid to a four-necked flask in an inert gas, stir and heat to 70 - 75 °C; then add 72 g of diethanolamine to the container, raise the temperature to 130 °C under stirring, keep warm for 1 h. After the heat preservation ends, add 55 g of toluene and evaporate. After the toluene evaporation ends, add 19 g of boric acid to the four-necked flask, maintain the temperature in the container at 130 - 135 °C, keep warm for 2 h. After the heat preservation ends, add 55 g of toluene and evaporate until the toluene evaporation ends;
[0062] Add 450 g of No. 36 industrial white oil and 263 g of pentaerythritol ester to a 2000 mL beaker, heat in a water bath to 125 °C, mix the materials in the beaker with the materials in the four-necked flask evenly under stirring, transfer to a larger four-necked flask, add antioxidant and defoamer, keep warm for 2 h. After the heat preservation ends, add 55 g of toluene and evaporate until the toluene evaporation ends. Stir to cool down to below 40 °C, then filter to obtain the rolling oil;
[0063] Emulsion preparation: Take 500 g of the above-mentioned rolling oil and slowly add it to a boric acid aqueous solution at about 40 °C. The weight of the boric acid aqueous solution is 29.5 kg, and the concentration of boric acid in the boric acid aqueous solution is 0.3%. Disperse it into an emulsion at a stirring speed of 300 - 500 r / min.
[0064] Take the emulsions prepared in the above examples and comparative examples, and the test results are as follows:
[0065]
[0066] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.
Claims
1. An aluminothermic rough rolling emulsion, characterized in that, It includes 2 wt% - 5 wt% of rolling oil and 95 wt% - 98 wt% of aqueous phase. The rolling oil includes base oil, unsaturated fatty acid, ethanolamine compound, antioxidant, boric acid and defoaming agent. The aqueous phase is an aqueous solution of boric acid.
2. The aluminothermic rough rolling emulsion according to claim 1, wherein, The raw materials of the rolling oil include 70 wt% - 80 wt% of base oil, 14 wt% - 18 wt% of unsaturated fatty acid, 4 wt% - 6 wt% of ethanolamine compound, 1 wt% - 2 wt% of boric acid, 0.5 wt% - 1 wt% of antioxidant and 0 wt% - 0.5 wt% of defoaming agent, and the balance is inevitable impurities.
3. The thermite rough rolling emulsion according to claim 1, characterized in that, The base oil contains pentaerythritol ester, and the pentaerythritol ester accounts for 20% - 35% of the weight of the base oil.
4. The aluminothermic rough rolling emulsion according to claim 1, wherein, The unsaturated fatty acid is a monounsaturated fatty acid with 12 - 18 carbon atoms.
5. The thermite rough rolling emulsion according to claim 1, wherein The ethanolamine compound is diethanolamine, triethanolamine or a mixture of diethanolamine and triethanolamine.
6. The thermite rough rolling emulsion according to claim 1, characterized in that By mass percentage, the mass percentage of boric acid in the aqueous boric acid solution is 0.3 wt% - 0.5 wt%.
7. A preparation method of thermite hot rolling emulsion, which is used to prepare the thermite hot rolling emulsion described in any one of claims 1-6, and is characterized in that, It includes the following steps: Step S1: Preparation of rolling oil: Step S11: Add unsaturated fatty acid to the container in an inert gas and heat to 70 - 75 °C; Step S12: Add half of the ethanolamine compound to the container in Step S1, raise the temperature to 130 °C under stirring, and keep warm for 1 - 2 h; Step S13: Add boric acid to the container in Step S2, maintain the temperature in the container at 130 - 135 °C, and keep warm for 1 - 2 h; Step S14: Heat the base oil to 120 - 125 °C, then mix it with the materials in the container in Step S3 under stirring, add antioxidant and defoaming agent, keep warm for 1 - 2 h, add the remaining ethanolamine compound and stir to cool down to below 40 °C; Step S2: Preparation of emulsion: Take the mixture in Step S14 and slowly add it to water, and disperse it into an emulsion at a stirring speed of 300 - 500 r / min.
8. The preparation method of the thermite rough rolling emulsion according to claim 7, characterized in that, In Steps S12, S13 and S14, a certain amount of water-carrying agent is added after the heat preservation is completed, and the next step is started after the water-carrying agent has evaporated completely.
9. The preparation method of the thermite rough rolling emulsion according to claim 8, characterized in that, In Steps S12, S13 and S14, the amount of water-carrying agent added is 3 - 5 times the weight of the ethanolamine compound.
10. The preparation method of the thermite rough rolling emulsion according to claim 7, wherein The use temperature of the emulsion is 50 - 60 °C.