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Preparation method for polyisobutylene succinimide

A technology of polyisobutylene succinimide and polyisobutylene succinic anhydride, which is applied in the field of technical chemical industry, can solve problems such as difficult control, wide molecular weight distribution, complex product components, etc., to reduce viscosity, improve dispersibility, and improve effective utilization rate effect

Inactive Publication Date: 2016-11-09
XINXIANG RICHFUL LUBE ADDITIVE CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in addition to generating polyisobutylene succinic anhydride, a large amount of other products similar to polyisobutylene succinic anhydride (such as the self-polymer of maleic anhydride, polyisobutylene and maleic anhydride) will also be generated in the reaction process of this method. Polymers, etc.), the product components are complex and difficult to control. These by-products cannot be separated from polyisobutylene succinic anhydride, so these by-products also react with polyethylene polyamine in the amination stage. The use of isobutylene succinimide is not completely synergistic, and some amine by-products may even affect the application performance of polyisobutylene succinimide products
Moreover, the molecular weight distribution of these by-products is wide, resulting in extremely high viscosity of polyisobutylene succinic anhydride, and the high viscosity makes the transportation of materials very troublesome

Method used

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  • Preparation method for polyisobutylene succinimide
  • Preparation method for polyisobutylene succinimide
  • Preparation method for polyisobutylene succinimide

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preparation example Construction

[0023] The invention provides a kind of preparation method of polyisobutylene succinimide, comprising:

[0024] A) the mixture of free radical initiator and base oil, maleic anhydride are added dropwise respectively in polyisobutene and react, obtain the mixture of polyisobutylene succinic anhydride and base oil;

[0025] B) mixing the mixture of polyisobutylene succinic anhydride and base oil obtained in step A) with polyethylene polyamine and the second base oil, and performing an amination reaction to obtain polyisobutylene succinimide.

[0026] The preparation method provided by the invention reduces the generation of by-products such as maleic anhydride autopolymer, polyisobutylene and maleic anhydride polymer, reduces the viscosity of polyisobutylene succinic anhydride intermediate, and improves the maleic anhydride Effective utilization rate of acid anhydride and saponification value of polyisobutylene succinic anhydride intermediate. And the dispersibility of the prep...

Embodiment 1

[0050] Add 150 grams of highly active polyisobutene (number average molecular weight 1000, alpha olefin content 84.65wt%) in the 500ml four-necked bottle, protect with nitrogen, stir and be warming up to 150 ℃; Weigh 2.0g di-tert-butyl peroxide in 150ml beaker, then pour 100g 150SN non-hydrogenated base oil, stir and mix evenly, add to the burette fixed on the four-necked bottle, and start to add dropwise; at the same time, start to add dropwise at the other port of the four-necked bottle Melted maleic anhydride, the dropwise amount of maleic anhydride was 20.6 g. The dropping speed of the mixture of di-tert-butyl peroxide and base oil should be equivalent to that of maleic anhydride, and the dropping time is 2 hours. After the two materials are added dropwise, continue to keep the temperature at 150°C for 2 hours, then adjust the temperature to 190°C, separate the light component under negative pressure, and add 70g of 150SN to the material after the light component has been ...

Embodiment 2

[0054] Add 150 grams of highly active polyisobutylene (number average molecular weight 1000, α-olefin content 84.65wt%) in the 500ml four-necked bottle, protect with nitrogen, stir and heat up to 150°C; weigh 2.0g dicumyl peroxide in 150ml Then pour 100g of 150SN non-hydrogenated base oil into the beaker, stir and mix evenly, add it into the burette fixed on the four-necked bottle, and start to add dropwise; at the same time, start to drop the molten The maleic anhydride, the dropwise amount of maleic anhydride is 20.6g. The dropping speed of the mixture of dicumyl peroxide and base oil should be equivalent to that of maleic anhydride, and the dropping time is 2 hours. After the two materials are added dropwise, continue to keep the temperature at 150°C for 2 hours, then adjust the temperature to 190°C, separate the light component under negative pressure, and add 70g of 150SN to the material after the light component has been separated. Hydrogen base oil to obtain a mixture ...

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Abstract

A provided preparation method for polyisobutylene succinimide comprises A) respectively dropwise adding a mixture of a radical initiator and base oil and maleic anhydride into polyisobutene for reaction, so as to obtain a mixture of polyisobutylene succinic anhydride and base oil; and B) mixing the mixture of polyisobutylene succinic anhydride and base oil, which is obtained in the step A), with polyethylene polyamine and second base oil, performing amination, so as to obtain polyisobutylene succinimide. The method reduces generation of byproducts such as autopolymer of maleic anhydride, polymer of polyisobutene and maleic anhydride and the like, reduces viscosity of the polyisobutylene succinic anhydride intermediate, and improves the effective utilization rate of maleic anhydride and saponification value of the polyisobutylene succinic anhydride intermediate. The dispersity of the prepared polyisobutylene succinimide is further improved.

Description

technical field [0001] The invention relates to the field of technical chemical industry, in particular to a preparation method of polyisobutylene succinimide. Background technique [0002] Polyisobutylene succinimide is a chemical product with a wide range of uses. It is mainly used as an ashless dispersant in the field of lubricating oil additives, and can also be used as an emulsifier in the manufacture of water-in-oil emulsion explosives. [0003] Its preparation method is mainly to use polyisobutylene and maleic anhydride to prepare the precursor polyisobutylene succinic anhydride, and then react with polyethylene polyamines (diethylene triamine, triethylene tetramine, tetraethylene pentamine, etc.) to synthesize poly Isobutylene succinimide. [0004] At present, there are three main processes for producing the precursor of polyisobutylene succinimide, that is, polyisobutylene succinic anhydride, which are chlorination method, thermal addition method and free radical i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F8/32C08F8/46C08F110/10
CPCC08F8/32
Inventor 王龙龙董志辉范金凤乔庆文王世平
Owner XINXIANG RICHFUL LUBE ADDITIVE CO LTD
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