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Demulsifier and its preparation method and application in demulsification of heavy oil containing asphaltene

A demulsifier and reaction technology, which is applied in the demulsifier and its preparation, and the application field of asphaltene-containing heavy oil demulsification. It can solve the problems of high dehydration cost, low equipment processing efficiency, and few varieties of heavy oil, and achieve excellent demulsification. The effect of the milk effect

Active Publication Date: 2022-01-04
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, people prefer to have a heavy oil demulsifier with excellent performance, because the dehydration temperature of heavy oil is high, the crude oil needs to be heated to a higher temperature, which not only consumes a lot of heat energy, but also needs to add a large amount of demulsifier, resulting in Heavy oil dehydration cost is high
[0005] At present, the research and development of demulsifiers mainly focus on the modification of non-ionic polyether demulsifiers and the compound use of demulsifiers. There are few single-dose demulsifiers available, and there are few demulsifiers that fundamentally change polyether products. reported, and its consumption is large, the cost is high, and the equipment processing efficiency is low

Method used

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  • Demulsifier and its preparation method and application in demulsification of heavy oil containing asphaltene

Examples

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preparation example Construction

[0019] The present invention provides a kind of preparation method of demulsifier on the one hand, this method comprises:

[0020] (1) In the first alcoholic solvent, the compound shown in formula (1) is subjected to the first Michael addition reaction with the unsaturated carboxylic acid ester;

[0021] Formula 1) R 1 Alkylene group selected from C1-C4, L 1 Alkylene group selected from C1-C4 or -(L 2 -NH) n -L 3 -, L 2 and L 3 Each independently selected from C1-C4 alkylene, n is an integer of 1-4;

[0022] (2) carrying out dehydration condensation reaction with the product of the compound shown in formula (2) and the first Michael addition reaction;

[0023] Formula (2) R 2 An alkyl group selected from C1-C4, m is an integer of 1-4;

[0024] (3) The product of the dehydration condensation reaction is desolvated to obtain product I and carry out the second Michael addition reaction with maleic acid monoester in an organic solvent;

[0025] (4) In the presence of...

Embodiment 1

[0069] This example is used to illustrate the demulsifier of the present invention and its preparation method.

[0070](1) 50g of 4-((2-aminoethyl)aminomethyl)-phenol was dissolved in 100g of methanol, and the resulting mixture was added dropwise to 26g of methyl acrylate (completed within about 6min), at 25°C Under stirring reaction 10h;

[0071] (2) Add 51g of 4-[2-(2-methoxyethoxy)ethoxy]phenol to the above reaction product, and continue to react for 5h at 25°C; Rotary distillation under reduced pressure under 130Pa condition, obtains product I;

[0072] (3) the product I of 100g, 43g monobutyl maleate and 240g acetonitrile join in the reactor and mix, and pass into N 2 Finally, the reactor was sealed, and the reaction was stirred at 90° C. for 3 h; the reaction product was cooled to room temperature and filtered, the filtrate was concentrated, and the solvent was removed by rotary evaporation to obtain product II;

[0073] (4) Add 120g of product II and 3.1g of catalyst...

Embodiment 2

[0076] This example is used to illustrate the demulsifier of the present invention and its preparation method.

[0077] (1) Dissolve 50g of 4-[1-(2-aminoethyl)aminoethyl]phenol in 100g of ethanol, and add the resulting mixture dropwise to 45g of isopropyl crotonate (complete addition within about 6 minutes) , stirred and reacted at 30°C for 12h;

[0078] (2) Add 4-[2-(2-methoxyethoxy)ethoxy]phenol to the above reaction product, and continue to react for 4.5h at 30°C; , Rotary distillation under reduced pressure under 130Pa condition, obtain product I;

[0079] (3) the product I of 100g, 38g monopropyl maleate and 220g acetonitrile join in the reactor and mix, and pass into N 2 Finally, the reactor was sealed, and the reaction was stirred at 85° C. for 2.5 h; the reaction product was cooled to room temperature and filtered, the filtrate was concentrated, and the solvent was removed by rotary evaporation to obtain product II;

[0080] (4) Add 120g of product II and 4g of cata...

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Abstract

The invention relates to the field of demulsification of crude oil, in particular to a demulsifier, a preparation method thereof and an application in demulsification of heavy oil containing asphaltene. The preparation method comprises: performing Michael addition reaction on the compound of formula (1) and unsaturated carboxylic acid ester in an alcoholic solvent; performing dehydration condensation reaction on the compound of formula (2) and the product of Michael addition reaction; dehydration condensation The product of the reaction removes the solvent and carries out Michael addition reaction with maleic acid monoester; in the presence of etherification catalyst, the product of Michael addition reaction is used as initiator, ethylene oxide and propylene oxide to carry out ring-opening polymerization reaction A block polyether is obtained; in an alcohol solvent, the block polyether and an amine compound are subjected to amidation reaction to obtain a demulsifier. The demulsifier with a new structure of the present invention is suitable for demulsification of heavy oil with high asphaltene content, and can obtain excellent demulsification effect more quickly with less dosage.

Description

technical field [0001] The invention relates to the field of demulsification of crude oil, in particular to a demulsifier, a preparation method thereof and an application in demulsification of heavy oil containing asphaltene. Background technique [0002] At present, the world's energy crisis is becoming more and more serious, and the reserves of easy-to-exploit and better-quality crude oil are decreasing day by day, and the exploitation of heavy oil with abundant reserves has gradually attracted people's attention. Heavy oil occupies a large proportion of the world's petroleum resources, and China is also one of the regions with relatively rich heavy oil resources. [0003] Heavy oil itself has a high viscosity and contains a large amount of natural emulsifiers, so it is easy to form emulsions. With the continuous improvement of heavy oil production technology, the emulsion structure of the produced fluid is more complex, the stability is increased, and the emulsion is brok...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G65/333C08G65/28C10G33/04
CPCC08G65/33306C08G65/2627C10G33/04
Inventor 苗杰沈明欢秦冰王振宇
Owner CHINA PETROLEUM & CHEM CORP
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