Preparation method of boron-modified lubricating oil ashless dispersant

An ashless dispersant and boron-modified technology, used in lubricating compositions, additives, petroleum industry, etc., can solve problems such as poor thermal stability and storage stability, lack of anti-wear effect, etc., and achieve low production costs , good oxidation resistance, good wear resistance effect

Inactive Publication Date: 2013-02-13
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] USP4925983 thinks that the boron of many boron-modified ashless dispersants will exist in a polymerized form, rather than the b

Method used

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  • Preparation method of boron-modified lubricating oil ashless dispersant
  • Preparation method of boron-modified lubricating oil ashless dispersant

Examples

Experimental program
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Effect test

Embodiment 1

[0025] Add 110 grams of polyisobutylene succinimide into a four-necked flask equipped with a mechanical stirrer, a thermometer, a ventilation device and a condensing reflux device, pass in argon, raise the temperature to 85-95 ° C, and add a particle size < 120 microns 2g of boric acid, then 1.2g of n-butanol and 1.2g of toluene were added, after 4 hours of reaction, the temperature was raised to 145°C, and the solvent was distilled for 4h to obtain the product borated polyisobutylene succinimide.

[0026] No unreacted boric acid slag was found after the product was filtered, and its physical and chemical properties are shown in Table 1.

[0027] The resulting product is scanned by Fourier transform infrared, as shown in Figure 1, according to the infrared absorption theory, B-0, B-N are respectively at 1330cm -1 and 1380cm -1 Stretching vibration absorption occurs on the left and right, and the absorption is very strong. It can be seen from the figure that at 1366cm -1 and ...

Embodiment 2

[0029] Add 110 grams of polyisobutylene succinimide into a four-necked flask equipped with a mechanical stirrer, a thermometer, a ventilation device and a condensing reflux device, pass in argon, raise the temperature to 85-95 ° C, and add a particle size < 120 microns 1.4g of metaboric acid, then add 1.7g of n-butanol and 1.8g of toluene, after reacting for 4 hours, heat up to 145°C, distill the solvent for 4h, and obtain the product borated polyisobutylene succinimide. After the product is filtered, there is no Unreacted boric acid slag was found, and its physical and chemical properties are shown in Table 1.

Embodiment 3

[0031] Add 110 grams of polyisobutylene succinimide into a four-necked flask equipped with a mechanical stirrer, a thermometer, a ventilation device and a condensing reflux device, pass in argon, raise the temperature to 85-95 ° C, and add a particle size < 120 microns 9.3g of metaboric acid, then add 10.2g of n-butanol and 11.0g of toluene, after 4 hours of reaction, heat up to 145°C, and distill the solvent for 4h to obtain the product borated polyisobutylene succinimide. After the product is filtered, there is no Unreacted boric acid slag was found, and its physical and chemical properties are shown in Table 1.

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Abstract

The invention discloses a preparation method of a boron-modified lubricating oil ashless dispersant. The method is characterized by comprising the following steps of: heating an ashless dispersant to 85-95 DEG C, and adding a boronizing agent and a mixed solvent under the condition of continuously introducing an inert gas, wherein the molar ratio of the ashless dispersant to the boronizing agent is 1:(1-3), and the dosage of the mixed solvent is 0.5-3 times the weight of the boronizing agent; and performing backflow boronizing reaction for 1-4 hours, heating to 120-160 DEG C, reacting for 2-4 hours, and recovering the solvent to obtain the boron-modified lubricating oil ashless dispersant. Through the invention, no boric acid settlement happens after the product is generated; the boron-modified lubricating oil ashless dispersant has high-temperature resistance, good oxidation resistance, low micelle concentration, good dispersing performance and excellent wear resistance under the extreme pressure condition; and moreover, the technology is simple, special equipment is not required in the production process, the production cost is low, and the solvent used in the boronizing process can be recovered to realize recycling.

Description

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Claims

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Application Information

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Owner XIANGTAN UNIV
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