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A kind of preparation method of polyalkenyl succinimide ashless dispersant

A polyalkenyl succinimide and ashless dispersant technology, applied in the field of oil additives, can solve the problems of high energy consumption and complicated process, and achieve the effects of lower reaction temperature, light color, and good physical and chemical performance indicators

Active Publication Date: 2018-01-30
江西福安路润滑材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method uses a single free radical method and organic acid method, and the process is complicated, and the reaction temperature of this method still needs to reach above 200°C, and the energy consumption is relatively large

Method used

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  • A kind of preparation method of polyalkenyl succinimide ashless dispersant
  • A kind of preparation method of polyalkenyl succinimide ashless dispersant
  • A kind of preparation method of polyalkenyl succinimide ashless dispersant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] In a three-necked round-bottom flask with nitrogen protection, add BASF's high-reactive polyisobutylene HRPIB (100g, 0.1mol) with a molecular weight of 1000, maleic anhydride (10.8g, 0.11mol) and dodecylbenzene sulfonic acid (1.0g), magnetically stirred, add di-tert-butyl peroxide (3.0g) at 145° C., react for 4h, stop the reaction. Filter to obtain polyisobutylene succinic anhydride.

[0037] Add polyisobutylene succinic anhydride (100g, 0.09mol) into a three-necked round-bottom flask with nitrogen protection, magnetically stir, pump water under reduced pressure, heat up to 135℃, add heavy polyamine (10g, 0.04mol) dropwise at 160 After reacting at ℃ for 0.5h, the reaction is stopped, and the polyisobutylene succinimide ashless dispersant is obtained.

Embodiment 2

[0039] In a three-necked round-bottom flask with nitrogen protection, a high-reactive polyisobutylene HRPIB (100g, 0.1mol) with a molecular weight of 1000 produced by BASF, maleic anhydride (10.8g, 0.11mol) and dodecylbenzene sulfonic acid were added (1.0g), magnetic stirring, dropwise add a mixed solution of di-tert-butyl peroxide (3.0g) and xylene (75g) at 145°C, react for 4h, and stop the reaction. Filter to obtain polyisobutylene succinic anhydride.

[0040] Add polyisobutylene succinic anhydride (100g, 0.09mol) into a three-necked round-bottom flask with nitrogen protection, magnetically stir, pump water under reduced pressure, heat up to 135℃, add heavy polyamine (23.4g, 0.085mol) dropwise, After reacting at 160°C for 0.5h, the reaction was stopped to obtain the polyisobutylene succinimide ashless dispersant.

Embodiment 3

[0042] In a three-necked round-bottom flask with nitrogen protection, add BASF's high-reactive polyisobutylene HRPIB (100g, 0.1mol) with a molecular weight of 1000, maleic anhydride (17.7g, 0.18mol) and dodecylbenzene sulfonic acid (1.0g), magnetic stirring, dropwise add a mixed solution of di-tert-butyl peroxide (3.0g) and xylene (75g) at 145°C, react for 4h, and stop the reaction. Filter to obtain polyisobutylene succinic anhydride.

[0043] Add polyisobutylene succinic anhydride (100g, 0.09mol) into a three-necked round-bottom flask with nitrogen protection, magnetically stir, pump water under reduced pressure, raise the temperature to 135°C, add pentaethylene hexaamine (9.3g, 0.04mol) dropwise , React at 150°C for 0.5h, stop the reaction, and obtain polyisobutylene succinimide ashless dispersant.

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Abstract

The present invention discloses a poly alkenyl succinimide ashless dispersant preparation method, which comprises: pouring a polyolefin, a maleic anhydride and an organic acid into a reactor provided with a heating and stirring device, uniformly mixing to obtain a mixed material, heating the mixed material under an inert atmosphere to achieve a temperature of 60-200 DEG C, adding a free radical initiator to carry out an alkylation reaction for 2-6 h, filtering to obtain poly alkenyl succinic anhydride, carrying out heating stirring on the poly alkenyl succinic anhydride under an inert atmosphere to achieve a temperature of 80-140 DEG C, adding polyethylene-polyamines in a dropwise manner to carry out an amidation reaction, controlling the temperature at 100-180 DEG C, carrying out the negative pressure dewatering during the amidation reaction process, and ending the reaction until no water is dewatered so as to obtain the poly alkenyl succinimide ashless dispersant. According to the present invention, the mixed catalysis effect of the free radical initiator and the organic acid is adopted to prepare the poly alkenyl succinimide ashless dispersant, and compared with the preparation method in the prior art, the preparation method of the present invention has characteristics of reaction temperature reducing, reaction time shortening and light product color.

Description

Technical field [0001] The invention belongs to the field of oil additives and relates to a preparation method of a polyalkenyl succinimide ashless dispersant. Background technique [0002] Adding a dispersant to the oil can effectively prevent the formation of coke and sludge, extend the oil change period, and save energy and economic expenditure. General dispersants mainly refer to ashless dispersants, which have no metal elements in their molecular structure and no ash after combustion. Among them, succinimide dispersant is the most widely used and used ashless dispersant, and its use amount accounts for more than 80% of the total dispersant dosage. [0003] At present, the disclosed preparation methods of polyalkenyl succinimide ashless dispersants are mainly divided into chlorination process, thermal addition process, free radical process and organic acid catalysis process. [0004] US3361673, US3202678, US3202679, US3676089, EP0623631, EP0629638 disclose a method for preparin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D207/412C08F10/10C08F8/46C08F8/32
CPCC07D207/412C08F8/32C08F2810/30C08F8/46C08F10/10
Inventor 刘升高曾红玲冯建湘王志刚
Owner 江西福安路润滑材料有限公司
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