A kind of aryl imidazoline modified polyisobutenyl amine dispersant

A technology of polyisobutylene amine and aryl imidazoline, which is applied in the direction of fuel additives, fuels, liquid carbon-containing fuels, etc., can solve problems such as adverse effects of catalysts, loss of effect of scale inhibitors, loss of application effects, etc., and achieve good scale removal effect , saving energy and resources, excellent high temperature stability

Active Publication Date: 2020-09-18
浙江杭化科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The main disadvantages of the above-mentioned dispersants are poor high temperature resistance or low boiling point. Some dispersants will decompose when the temperature is higher than 300°C, so that the application effect will drop sharply, or even lose the application effect; °C, under the condition of -100Kpa, it is easy to gasify, and the antiscalant will lose its due effect as the gas phase material is taken away.
In addition, sulfur and phosphorus-containing compounds can adversely affect catalysts in subsequent processing units

Method used

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  • A kind of aryl imidazoline modified polyisobutenyl amine dispersant
  • A kind of aryl imidazoline modified polyisobutenyl amine dispersant
  • A kind of aryl imidazoline modified polyisobutenyl amine dispersant

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Effect test

Embodiment 1

[0030] The preparation method of the polyisobutylene amine dispersant modified by aryl imidazoline comprises the following steps:

[0031] (1) Add 100g of phenylacetic acid and 167g of tetraethylenepentamine into the reactor respectively, then add 60g of xylene as solvent and water-carrying agent, pass in nitrogen, first react at 140°C for 4h to obtain amide, and then raise the temperature to 210°C React for 2.5 hours to carry out cyclodehydration, during which the water generated by the reaction is separated, and the unreacted raw materials are removed by rotary evaporation to obtain benzyl imidazoline;

[0032] (2) Add 500g of polyisobutene with a molecular weight of 500-2000 and a terminal double bond rate greater than 80% and 250g of n-heptane into the reactor, add an acidic ion exchange resin as a catalyst, and then add 25g of acetic acid, within 3 hours at 80°C Add 100g of hydrogen peroxide dropwise, keep the temperature for 6 hours, wash with water until neutral, and sp...

Embodiment 2

[0035] The preparation method of the polyisobutylene amine dispersant modified by aryl imidazoline comprises the following steps:

[0036] (1) Add 100g of phenylacetic acid and 167g of tetraethylenepentamine into the reactor respectively, then add 60g of xylene as solvent and water-carrying agent, pass in nitrogen, first react at 160°C for 3h to obtain amide, and then heat up to 220°C The reaction was carried out for 2 hours by cyclodehydration, during which the water generated by the reaction was separated, and the unreacted raw materials were removed by rotary evaporation to obtain benzyl imidazoline;

[0037] (2) Add 500g of polyisobutene with a molecular weight of 500-2000 and a terminal double bond rate greater than 80% and 250g of n-heptane into the reactor, add acidic ion exchange resin as a catalyst, and then add 25g of acetic acid, and heat it at 90°C within 2 hours Add 100g of hydrogen peroxide dropwise, keep the temperature for 5 hours, wash with water until neutral...

Embodiment 3

[0040] The preparation method of the polyisobutylene amine dispersant modified by aryl imidazoline comprises the following steps:

[0041] (1) Add 100g of phenylacetic acid and 167g of tetraethylenepentamine into the reactor respectively, then add 60g of xylene as solvent and water-carrying agent, pass in nitrogen, first react at 130°C for 6h to obtain amide, and then heat up to 200°C The reaction was carried out for 3 hours by cyclodehydration, during which the water generated by the reaction was separated, and the unreacted raw materials were removed by rotary evaporation to obtain benzyl imidazoline;

[0042](2) Add 500g of polyisobutene with a molecular weight of 500-2000 and a terminal double bond rate greater than 80% and 250g of n-heptane into the reactor, add acidic ion exchange resin as a catalyst, and then add 25g of acetic acid, within 3 hours at 70°C Add 100g of hydrogen peroxide dropwise, keep the temperature for 8 hours, wash with water until neutral, and spin of...

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Abstract

The invention provides an aryl imidazoline modified polyisobutylene amine dispersant and a preparation method of the dispersant. The aryl imidazoline modified polyisobutene amine dispersant provided by the invention has a high boiling point and excellent high-temperature stability, and has stronger detergency and dispersion effect on the scale on oil refining equipment. The amino groups and imidazoline groups in the dispersing agent can form hydrogen bonds with the atoms of N, S, O and the like in the scale. At the same time, pi-pi interaction can be achieved between the benzyl imidazoline structure and the macromolecular fused rings in the scale, and the adsorption and stabilizing effects of the dispersant on the scale are further enhanced, so that the dispersion effect can be better exerted, and dirt can be removed. In addition, imidazoline units can passivate the inner surface of the oil refining equipment, and a protective film can be formed on the wall surface, so that the attachment of the dirt is effectively prevented.

Description

technical field [0001] The invention belongs to the technical field of petroleum refining, and in particular relates to an aryl imidazoline-modified polyisobutenylamine dispersant used as an oil refining scale inhibitor. Background technique [0002] In recent years, the nature of my country's crude oil has become increasingly heavy and inferior. At the same time, in order to pursue higher yields of light oil products, the operating conditions of equipment have become increasingly harsh and the processing depth has been increasing. This has brought great impact to petroleum refining. Difficulties, such as some equipment in the atmospheric and vacuum unit, including pipelines, heating furnace tubes, heat exchangers and other equipment are prone to fouling, which will reduce the heat exchange efficiency of heat exchangers and heating furnaces, and pipeline blockage will not only affect the energy saving and reduction of the refining unit. It also affects the safe production and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F8/30C08F8/08C08F10/10C10L1/2383C10L10/04
CPCC08F8/30C10L1/2383C10L10/04C08F8/08C08F10/10
Inventor 付鑫林向阳李有金金斌程文武孔凡龙熊强华
Owner 浙江杭化科技股份有限公司
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