Lubricating oil pour point depressant copolymerized with soybean oil and acrylates and preparation method thereof

A technology of acrylates and methyl methacrylates, applied in the field of lubricating oil pour point depressants and their preparation fields copolymerized with soybean oil and acrylates, can solve the problem of poor low temperature performance, poor thermal stability and oxidative stability, unsaturated High-level problems, to achieve a strong effect of tolerance

Active Publication Date: 2022-02-01
XI'AN PETROLEUM UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The main component of natural vegetable oil (such as soybean oil) is triglyceride, which structure makes it easy to accumulate at low temperature to form larger crystals, resulting in poor low temperature performance; in addition, the fatty acid chains of many vegetable oils are not The degree of saturation (-C=C-) is very high, on the one hand, it leads to poor thermal stability and oxidation stability, on the other hand, because most of the double bonds in vegetable oil molecules are non-conjugated, the polymerization activity is low
Therefore, how to chemically modify and modify vegetable oils to overcome the disadvantages of poor oxidation stability and low-temperature fluidity of vegetable oils has become a hot topic for researchers.

Method used

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  • Lubricating oil pour point depressant copolymerized with soybean oil and acrylates and preparation method thereof
  • Lubricating oil pour point depressant copolymerized with soybean oil and acrylates and preparation method thereof
  • Lubricating oil pour point depressant copolymerized with soybean oil and acrylates and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] The method for preparing lubricating oil pour point depressant with soybean oil and acrylates copolymerization comprises the following steps:

[0049] At room temperature, take 2g of methyl methacrylate, the amount of soybean oil is 2% of the mass of methyl methacrylate, that is, 0.04g, 1.7×10 -5mol catalyst, 5mL toluene in a dry polymerization reaction tube; place the reaction tube on a Schlank device, perform anhydrous and oxygen-free operation, vacuumize for 3 minutes, fill with nitrogen for 6 minutes, repeat twice, and finally place in a constant temperature oil bath In the pot, heat and stir at 50°C for 30 minutes to obtain a uniform solution; then connect it to the Schlank device again, pump vacuum for 3 minutes, fill with nitrogen for 6 minutes, and inject the toluene solution of azobisisobutyronitrile in the nitrogen atmosphere, in which the peroxide The amount of benzoyl is 2% of the mass of the monomer (methyl methacrylate, soybean oil), which is 0.0408g. Diss...

Embodiment 2

[0054] At room temperature, take 5g of methyl methacrylate, the amount of soybean oil is 10% of the mass of methyl methacrylate, which is 0.05g, 2.5×10 -5 mol catalyst, 6mL toluene in a dry reaction tube, and place the reaction tube on the Schlank device for anhydrous and oxygen-free operation, vacuumize for 5 minutes, fill with nitrogen for 8 minutes, repeat twice, and finally place it in an oil bath , heated and stirred at 50°C for 30 minutes to obtain a uniform solution; then connected to the Schlank device again, vacuumed for 5 minutes, filled with nitrogen for 8 minutes, and then injected a toluene solution of benzoyl peroxide in a nitrogen atmosphere, in which azobisiso The amount of butyronitrile is 0.1% of the mass of the monomer (methyl methacrylate, soybean oil), which is 0.00505g. Dissolve it in 4mL of toluene; set the temperature of the oil bath to 90°C and react for 8h; after the reaction , Pour the solution in the reaction tube into a beaker filled with 50mL of m...

Embodiment 3

[0056] At room temperature, take 3g of methyl methacrylate, the amount of soybean oil is 40% of the mass of methyl methacrylate, which is 1.2g, 1.0×10 -6 mol catalyst, 7mL toluene in a dry reaction tube, and place the reaction tube on the Schlank device for anhydrous and oxygen-free operation, vacuumize for 4 minutes, fill with nitrogen for 7 minutes, repeat twice, and finally place in the oil bath , heated and stirred at 50°C for 30 minutes to obtain a homogeneous solution; then connected to the Schlank device again, evacuated for 4 minutes, filled with nitrogen for 7 minutes, and injected the toluene solution of benzoyl peroxide in the nitrogen atmosphere, in which azobisisobutyl The amount of nitrile is 0.04% of the mass of the monomer (methyl methacrylate, soybean oil), which is 0.00168g, which is dissolved in 3mL of toluene; the temperature of the oil bath is set at 110°C, and the reaction is carried out for 4h; after the reaction is completed, Pour the solution in the re...

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Abstract

With the lubricating oil pour point depressant of soybean oil and acrylic acid esters copolymerization, the chemical formula of gained polymer is as shown in formula (I) or formula (II): Step 1, earlier soybean oil and acrylic acid ester, Salen-Cu-water Poplaric aldehyde catalyst, refined toluene that has been refluxed and dried by sodium metal and distilled under reduced pressure are placed in the polymerization reaction tube, vacuumed and filled with nitrogen on the Schlank device, and stirred to obtain a uniformly mixed solution; step 2, connect the solution obtained in step 1 Go to the Schlank device, vacuumize and fill with nitrogen, and inject the toluene solution of AIBN or BPO during the last nitrogen filling to obtain a uniform solution; step 3, put the solution obtained in step 2 in a constant temperature oil bath, and wait for After the reaction, the solution is poured into cold methanol for precipitation; step 4, the filtrate is filtered, and the obtained filter residue is vacuum-dried, and the obtained polymer can be used as a pour point depressant for lubricating oil; it has the characteristics of excellent performance and simple and feasible method.

Description

technical field [0001] The invention belongs to the technical field of lubricating oil additives, in particular to a lubricating oil pour point depressant copolymerized with soybean oil and acrylates and a preparation method thereof. Background technique [0002] Lubricating oil plays an important role in the "power age", and adding a small amount (1%~30%) of lubricating oil additives can improve the performance of lubricating oil and prolong its service life. Traditional petroleum-based lubricant additives are difficult to biodegrade and can have adverse environmental impacts if leaked, spilled or mishandled. Therefore, from the perspective of environmental protection, it is very necessary to synthesize a new type of environmentally friendly lubricating oil additives that can meet various special needs. [0003] Among the many natural renewable materials, natural vegetable oil (such as soybean oil) is considered to be the most important category, which has good lubricity, ...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): C10M145/14C08F220/14C08F222/14
CPCC10M145/14C08F220/14C10M2209/084C10N2030/64C08F222/103
Inventor丁丽芹梁生荣申志兵李善建李孟阁
OwnerXI'AN PETROLEUM UNIVERSITY