Lubricant base oil with long-carbon-chain diacid duplicate-ester structure, and preparation method and application of lubricant base oil
A technology of lubricating oil base oil and long carbon chain dibasic acid, which is applied in the field of lubricating oil base oil, can solve the problems of no industrial production, long post-processing time, and difficult product separation, and achieve high viscosity index and short production cycle , good biodegradability
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[0034] Example 1:
[0035] In a four-necked flask equipped with a stirrer, a temperature controller, a nitrogen conduit, and a condenser, add 85g of trimethylolpropane dioctyl ester, 46g of dodecanedioic acid, 1g of p-toluenesulfonic acid, and 150ml of toluene. The reaction was conducted for 3.5 hours at 135°C. The conversion rate was measured to be the maximum at this time, which was 95.2%, and the reaction was stopped.
[0036] Mix cyclohexane, isopropanol, and sodium chloride at 1:5:0.1 (volume:volume:weight), measure 100ml, add it to the beaker containing the crude product, and add 5% hydroxide at the same time 60ml of sodium solution. After stirring for 10 minutes, let it stand for 30 minutes to remove the water layer. Wash with deionized water for 4 to 5 times until the liquid is neutral.
[0037] Put the washed crude product into a molecular distillation device for solvent removal and purification. The first-stage distillation conditions are 120°C, 500pa; the second-stage d...
Example Embodiment
[0038] Example 2:
[0039] In a four-necked flask equipped with a stirrer, a temperature controller, a nitrogen conduit, and a condenser, 85g of trimethylolpropane diisooctyl ester, 46g of dodecanedioic acid, 1g of p-toluenesulfonic acid and 150ml of toluene were added. The temperature was raised to 135°C and reacted for 4 hours. The conversion rate was measured at this time, which was 95.7%, and the reaction was stopped.
[0040] Mix cyclohexane, ethanol and potassium chloride at 1:10:0.2 (volume:volume:weight), measure 100ml, add it to the beaker containing the crude product, and add potassium hydroxide solution with a concentration of 5% 60ml. After stirring for 10 minutes, let it stand for 30 minutes to remove the water layer. Wash with deionized water for 4 to 5 times until the liquid is neutral.
[0041] Put the washed crude product into a molecular distillation device for solvent removal and purification. The first-stage distillation conditions are 120°C, 500pa; the second-...
Example Embodiment
[0043] Example 3:
[0044] In a four-necked flask equipped with a stirrer, a temperature controller, a nitrogen conduit, and a condenser, 85g of trimethylolpropane diisooctyl ester, 43.2g of undecanedioic acid, 1g of p-toluenesulfonic acid, and 100ml of toluene were added , The temperature was raised to 130°C, and the reaction was conducted for 3.5 hours. It was determined that the conversion rate was the largest at this time, which was 96.2%, and the reaction was stopped.
[0045] Mix cyclohexane, isopropanol, and sodium chloride at 1:5:0.1 (volume:volume:weight), measure 100ml, add it to the beaker containing the crude product, and add 5% hydroxide at the same time 60ml of sodium solution. After stirring for 10 minutes, let it stand for 30 minutes to remove the water layer. Wash with deionized water for 4 to 5 times until the liquid is neutral.
[0046] Put the washed crude product into a molecular distillation device for solvent removal and purification. The first-stage distill...
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