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Composite type crude oil demulsifier and preparation method thereof

A crude oil demulsifier, a composite technology, applied in chemical instruments and methods, dehydration/demulsification by chemical methods, dissolution, etc., to achieve the effects of good demulsification performance, good surface performance and penetration ability

Inactive Publication Date: 2010-02-10
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is difficult for a single demulsifier to fully meet these requirements

Method used

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  • Composite type crude oil demulsifier and preparation method thereof
  • Composite type crude oil demulsifier and preparation method thereof
  • Composite type crude oil demulsifier and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment 1, the synthesis of composite crude oil demulsifier A

[0024] a. Synthesis of primary amine polyether compounds

[0025] (1) 1g n-dodecylamine and 1g sodium hydroxide are added to the autoclave;

[0026] (2) Seal the reaction kettle system, and use nitrogen to displace the air in the autoclave, the feed kettle and the feed pipe;

[0027] (3) Stir and heat up, when the temperature rises to 100°C, slowly add 100g of propylene oxide, control the reaction temperature at 120-140°C, and the pressure at 0.2-0.4Mpa;

[0028] (4) After the reaction is completed, age for 1 hour and cool down to 100°C;

[0029] (5) 100g of ethylene oxide was added into the feed tank, and reacted under the same conditions as (3), to obtain compound 1.

[0030] Compound 1 was analyzed by NMR and IR. The number average molecular weight of compound 1 was determined by high performance gel permeation chromatography.

[0031] The NMR spectrum of compound 1 is as figure 1 as shown, fig...

Embodiment 2

[0037] Embodiment 2, the synthesis of composite crude oil demulsifier B

[0038] a. Synthesis of primary amine polyether compounds

[0039] (1) 0.2g n-dodecylamine and 1g KOH are added to the autoclave;

[0040] (2) Seal the reaction kettle system, and use nitrogen to displace the air in the autoclave, the feed kettle and the feed pipe;

[0041] (3) Stir and heat up, when the temperature rises to 100°C, slowly add 100g of propylene oxide, control the reaction temperature at 120-140°C, and the pressure at 0.2-0.4Mpa;

[0042] (4) After the reaction is completed, age for 1 hour and cool down to 100°C;

[0043] (5) Add 100 g of ethylene oxide into the feed tank, and react under the same conditions as (3) to obtain compound 2.

[0044] Compound 2 was analyzed by NMR and IR. The number average molecular weight of compound 2 was determined by high performance gel permeation chromatography.

[0045] The measurement results of nuclear magnetic and infrared analysis and number avera...

Embodiment 3

[0050] Embodiment 3, the synthesis of composite crude oil demulsifier C

[0051] a. Synthesis of primary amine polyether compounds

[0052] (1) 22g n-dodecylamine and 1g sodium acetate are added to the autoclave;

[0053] (2) Seal the reaction kettle system, and use nitrogen to displace the air in the autoclave, the feed kettle and the feed pipe;

[0054] (3) Stir and heat up, when the temperature rises to 100°C, slowly add 100g of propylene oxide, control the reaction temperature at 120-140°C, and the pressure at 0.2-0.4Mpa;

[0055] (4) After the reaction is completed, age for 1 hour and cool down to 100°C;

[0056] (5) Add 100 g of ethylene oxide into the feed tank, and react under the same conditions as (3) to obtain compound 3.

[0057] Compound 3 was analyzed by NMR and IR. The number average molecular weight of compound 3 was determined by high performance gel permeation chromatography.

[0058] The measurement results of NMR and infrared analysis and number averag...

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Abstract

The invention discloses a composite type crude oil demulsifier and a preparation method thereof. The composite type crude oil demulsifier comprises active ingredients of compounds in a formula I and aformula II, wherein R1 is alkyl having 10 to 24 carbon atoms; PO is -(CH2-O-CH2CH2)-; EO is -(O-CH2CH2)-; R2 is alkyl with the number of the carbon atoms more than 9; Ar is aryl; m is between 10 and500; and n is between 10 and 500. The invention also discloses the method for preparing the composite type crude oil demulsifier. The composite type crude oil demulsifier has excellent surface property and infiltrability, can reach an oil-water interface quickly and replace natural interface active substances to form a novel unstable oil-water interface film, has excellent demulsification performance on crude oil emulsion, and can be applied in the fields of crude oil extraction, petroleum refining and the like.

Description

technical field [0001] The invention relates to a composite crude oil demulsifier and a preparation method thereof. Background technique [0002] With the development of the world's petroleum industry, the amount of oil production is increasing day by day, which makes the amount of crude oil emulsion increase day by day. Especially after water injection is used to enhance oil recovery, the water content of crude oil increases significantly, and most of the crude oil is extracted in the form of oil-water emulsion. . Crude oil is exported after chemical demulsification and dehydration. Studying the stability and demulsification of crude oil emulsion can provide technical guidance for the dehydration of crude oil and the development and application of demulsifiers. Three conditions for the formation of crude oil emulsion: (1) the existence of immiscible oil-water two phases; (2) the existence of emulsifiers, most of which have lipophilic and hydrophobic properties, and general...

Claims

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Application Information

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IPC IPC(8): B01F17/00B01D17/05C10G33/04C09K23/00
Inventor 王金本檀国荣杨惠史学峰李荣强周继柱樊明红王毅琳张健向问陶
Owner INST OF CHEM CHINESE ACAD OF SCI
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