A kind of lubricating oil ashless dispersant and preparation method thereof

An ashless dispersant and lubricating oil technology, which is applied in lubricating compositions, additives, petroleum industry, etc., can solve the problems of low nitrogen content and alkali value, can not be effectively prevented, and the dispersion effect is not good, so as to prolong the service life and increase the adsorption and suspending ability, avoiding the effect of excessive viscosity growth

Active Publication Date: 2022-07-05
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Polyether amine compounds alone are used as dispersants, because of their low nitrogen content and base value, their dispersing effect is far inferior to that of polyisobutylene succinimide dispersants, and cannot effectively prevent large particle deposits such as soot. In literature and patents, polyetheramine compounds are usually mixed with polyisobutylene succinimide dispersants, boronized ashless dispersants, etc., but simple mixing and compounding does not achieve the function of ashless dispersants structurally requirements

Method used

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  • A kind of lubricating oil ashless dispersant and preparation method thereof

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preparation example Construction

[0044] The preparation method of the lubricating oil ashless dispersant provided by the present invention is the preparation method of the above-mentioned lubricating oil ashless dispersant, and comprises the following steps:

[0045] (1) First, add hydrocarbyl-substituted succinic anhydride and base oil into the reactor, heat up to 70-90°C, stir evenly, add a compound containing carboxyl and hydroxyl groups, and continuously react at 130-150°C for 5-8 hours, then at 130-150°C for 5-8 hours Dewatering at 140-160°C for 2-4 hours to obtain intermediate product A;

[0046] (2) adding the intermediate product A into the reactor, heating up to 95~110℃, adding polyvinylpolyamine compound and polyetheramine compound at the same time, reacting at 115~125℃ for 2~3 hours, then warming up to The water is removed at 150-160° C. for 5-8 hours, and the ashless dispersant B is obtained by cooling.

[0047] In some embodiments, the hydrocarbyl-substituted succinic anhydride is oil-soluble, a...

Embodiment 1

[0058] Preparation of intermediate products

[0059] 1000g of polyisobutylene succinic anhydride (PIBSA-2300, 0.43mol) and 800g of base oil Youbase4 were added to a 4L four-necked flask with a stirring and a thermometer, the temperature was raised to 85°C, and after stirring for 30min to mix well, 52.4g (0.69mol) ) glycolic acid was added to the four-necked flask, and the temperature was raised to 150°C at a rate of 10°C / h. After continuous reaction for 8 hours, continued at 150°C, a large amount of nitrogen gas was introduced to remove water for 2.5 hours to obtain an intermediate product A1 with an acid value It is 44.8KOH mg / g.

Embodiment 2

[0061] Preparation of intermediate products

[0062] 1000g of polyisobutylene succinic anhydride (PIBSA-2300, 0.43mol) and 800g of base oil Youbase4 were added to a 4L four-necked flask with a stirring and a thermometer, the temperature was raised to 85°C, and after stirring for 30min to mix well, 65g (0.86mol) Glycolic acid was added to the four-necked flask, and the temperature was raised to 145°C at a rate of 10°C / h. After 8 hours of continuous reaction, the temperature was raised to 150°C, and a large amount of nitrogen was introduced for stripping and removing water for 2.5 hours to obtain an intermediate product A2 with an acid value. 56KOH mg / g.

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Abstract

The present invention relates to an ashless dispersant for lubricating oil, which has the structure represented by formula (I) or (II). The present invention also relates to a method for preparing an ashless dispersant for lubricating oil, which includes the following steps: (1) firstly adding hydrocarbon-substituted succinic anhydride and base oil into a reactor, heating the temperature to 70-90° C., stirring evenly, adding a carboxyl group-containing The compound with hydroxyl group is continuously reacted at 130-150 ℃ for 5-8 hours, and then water is removed at 140-160 ℃ for 2-4 hours to obtain intermediate product A; (2) The intermediate product A is added to the reactor, and the temperature is raised. To 95~110℃, add polyvinylpolyamine compound and polyetheramine compound at the same time, react at 115~125℃ for 2~3 hours, then heat up to 150~160℃ to remove water for 5~8 hours, cool to obtain ashless Powder B.

Description

technical field [0001] The invention belongs to the field of lubricating oil additives, and relates to an ashless dispersant and a preparation method thereof. Background technique [0002] The emergence of ashless dispersants is inseparable from the development of the modern automobile industry. With the development of the automobile industry in the 1940s and 1950s, the number of automobiles increased sharply, causing urban traffic jams and serious air pollution. In order to reduce air pollution, positive pressure intake and exhaust (PCV) systems are commonly used, which can easily allow the breakdown products of fuel oil (peroxides, hydroperoxides and free radicals) to leak into the crankcase and cause lubricating oil. The oxidation is finally deposited on the surface of the piston, resulting in a decrease in the lubricating effect. In the early 1960s, the United States developed various non-polymeric succinimide ashless dispersants, which solved the problem of low tempera...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10M133/56C10M133/58C10M149/12C08F8/32C08F10/10C08G81/02C10N30/04
CPCC10M133/56C10M133/58C10M149/12C08F8/32C08G81/025C10M2215/30C10M2215/28C10M2217/06C08F10/10
Inventor 刘智峰黄卿张荷周旭光薛卫国汤仲平
Owner PETROCHINA CO LTD
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