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Oligomeric quaternary ammonium salt type heavy oil viscosity reducer and preparation method thereof

A heavy oil viscosity reducer and polyquaternium salt technology, applied in chemical instruments and methods, preparation of organic compounds, preparation of amino hydroxyl compounds, etc., can solve problems such as lower than expected viscosity reduction effect and chromatographic separation phenomenon, etc. Achieve the effects of substantial viscosity reduction, avoid chromatographic separation, and excellent emulsifying ability

Active Publication Date: 2020-05-19
CHINA PETROLEUM & CHEM CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, in the process of field application, the compound viscosity-reducing system is prone to chromatographic separation in the formation, resulting in the actual viscosity-reducing effect being lower than expected

Method used

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  • Oligomeric quaternary ammonium salt type heavy oil viscosity reducer and preparation method thereof
  • Oligomeric quaternary ammonium salt type heavy oil viscosity reducer and preparation method thereof
  • Oligomeric quaternary ammonium salt type heavy oil viscosity reducer and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0040] Embodiment 1 A kind of oligomeric quaternary ammonium salt type heavy oil viscosity reducer

[0041] The oligomeric quaternary ammonium salt type heavy oil viscosity reducer is ethoxylated quaternary ammonium salt type dimeric surfactant C 3 h 6 -2C 12 EO 3 , and its molecular structure is as follows:

[0042]

[0043] The preparation method of described oligomeric quaternary ammonium salt type heavy oil viscosity reducer is:

[0044] (1) Add 18.5g (100 mmol) of the weighed raw material dodecylamine into a reaction kettle equipped with a stirring device, heat to 150°C while blowing nitrogen, and add 26.4g (600 mM) of ethylene oxide after 40 minutes. millimole), the temperature is maintained at 150°C, the pressure is controlled <0.80MPa, and the reaction is stirred for 1 hour. After the reaction is completed, the system is purged with nitrogen, and after cooling, it is neutralized and dehydrated to obtain the intermediate dodecyl polyoxyethylene ether tertiary ami...

Embodiment 2

[0048] Embodiment 2 A kind of oligomeric quaternary ammonium salt type heavy oil viscosity reducer

[0049] The oligomeric quaternary ammonium salt type heavy oil viscosity reducer is ethoxylated quaternary ammonium salt type dimeric surfactant C 3 h 5 (OH)-2C 12 EO 3 , and its molecular structure is as follows:

[0050]

[0051] The preparation method of described oligomeric quaternary ammonium salt type heavy oil viscosity reducer is:

[0052] (1) The preparation of the intermediate lauryl polyoxyethylene ether tertiary amine is the same as in Example 1.

[0053] (2) Weigh 22.5 g (50 mmol) of the intermediate dodecyl polyoxyethylene ether tertiary amine and 4.36 g (20 mmol) of 1,3-dibromo-2-propanol. Add the weighed raw materials into a reactor with a reflux and stirring device, add 800 grams of isopropanol, and after 3 days of reflux reaction, stop the reaction, evaporate the solvent under reduced pressure, and obtain 10.0 grams of pure Product C 5 h 8 -4C 12 EO...

Embodiment 3

[0055] Embodiment 3 A kind of oligomeric quaternary ammonium salt type heavy oil viscosity reducer

[0056] The oligomeric quaternary ammonium salt type heavy oil viscosity reducer is ethoxylated quaternary ammonium salt type trimeric surfactant C 3 h 5 -3C 12 EO 3 , and its molecular structure is as follows:

[0057]

[0058] The preparation method of described oligomeric quaternary ammonium salt type heavy oil viscosity reducer is:

[0059] (1) The preparation of the intermediate lauryl polyoxyethylene ether tertiary amine is the same as in Example 1.

[0060] (2) Weigh 22.5 g (50 mmol) of the intermediate dodecyl polyoxyethylene ether tertiary amine and 4.18 g (15 mmol) of 1,2,3-tribromopropane. Add the weighed raw materials into a reactor with a reflux and stirring device, add 800 grams of isopropanol, and after 3 days of reflux reaction, stop the reaction, evaporate the solvent under reduced pressure, and obtain 8.5 grams of pure Product C 3 h 5 -3C 12 EO 3 ,...

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Abstract

The invention belongs to the technical field of oil exploitation, and particularly relates to an oligomeric quaternary ammonium salt type heavy oil viscosity reducer and a preparation method thereof.The heavy oil viscosity reducer is an ethoxy quaternary ammonium salt type oligomer. A plurality of amphiphilic elements in the molecular structure of the oligomer have a relatively strong synergisticeffect and are arranged more closely on an oil-water interface, so the oligomer has excellent emulsifying capacity. On the other hand, molecules of the oligomer contains a plurality of EO elements which can effectively chelate heavy metal ions in heavy oil and destroy association of metal ions and asphaltene aromatic lamellas so as to destroy asphaltene aggregate structures. A single ethoxy quaternary ammonium salt type oligomeric surfactant provided by the invention can effectively reduce the viscosity of heavy oil with a high heavy metal content, and has a viscosity reduction rate of up to76-95%.

Description

technical field [0001] The invention belongs to the technical field of petroleum exploitation, and in particular relates to an oligomeric quaternary ammonium salt type heavy oil viscosity reducer and a preparation method thereof. Background technique [0002] my country has abundant heavy oil reserves and huge potential production capacity. However, the composition of heavy oil is relatively complex, containing a large amount of macromolecular organic matter such as wax, colloid, asphaltene, and a small amount of heavy metals, making its density and viscosity much higher than that of light crude oil, and its fluidity at room temperature is poor, which leads to its exploitation And transportation is extremely difficult, and the industry is expensive. [0003] The research on viscosification mechanism of heavy oil shows that colloid and asphaltenes are components with large relative molecular mass and strong polarity in heavy oil. high aggregates. Colloid molecules are adso...

Claims

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Application Information

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IPC IPC(8): C07C213/04C07C213/08C07C217/08C09K8/584C09K8/588
CPCC09K8/584C07C213/04C07C213/08C07C217/08
Inventor 曹绪龙乔富林祝仰文秦冰石静江建林于群高敏李金志赵志毅
Owner CHINA PETROLEUM & CHEM CORP
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