Aryl alkyl polyoxyethylene ether amine oxide surfactant and preparation method and application thereof

A technology of aryl alkyl polyoxyethylene ether and surfactant, which is applied in chemical instruments and methods, transportation and packaging, chemical/physical processes, etc., and can solve problems such as production decline, low recovery rate, and rising water cut. Reach the effects of reducing interfacial tension, increasing oil recovery, and good emulsification performance

Active Publication Date: 2015-03-11
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And with the deepening of the development of low-permeability oilfields, the problems of rising water cut, declining production, and low recove

Method used

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  • Aryl alkyl polyoxyethylene ether amine oxide surfactant and preparation method and application thereof
  • Aryl alkyl polyoxyethylene ether amine oxide surfactant and preparation method and application thereof
  • Aryl alkyl polyoxyethylene ether amine oxide surfactant and preparation method and application thereof

Examples

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Example Embodiment

[0080] Example 1

[0081] The present embodiment provides a kind of phenyloctadecyl polyoxyethylene ether (x) amine oxide amphoteric surfactant, and its synthesis method comprises the following steps:

[0082] (1) Fourier alkylation reaction:

[0083] In a sealed reaction kettle, methanesulfonic acid was used as a catalyst, and 3.5 mol of benzene was added. After the temperature was raised to 100 °C, 1 mol of methyl oleate was added dropwise. The dropping time was controlled at 6 h. Cool to room temperature, stand for stratification, rinse three times with ice water, separate the aqueous solution of the lower layer catalyst, recover and store, continue to wash the upper layer liquid three times with ice water, and dry in turn, under the conditions of 20Pa and 220℃, molecular distillation obtains benzene methyl octadecanoate.

[0084] (2) Hydrogenation reduction reaction:

[0085] Under the reaction conditions of 200 ° C and 25-30 MPa, the reaction product of step (1), methy...

Example Embodiment

[0100] Example 2

[0101] The present embodiment provides a kind of tolyl octadecyl polyoxyethylene ether (x) amine oxide amphoteric surfactant, and its synthesis method comprises the following steps:

[0102] (1) Fourier alkylation reaction:

[0103] In the sealed reaction kettle, methanesulfonic acid was used as a catalyst, and 3.5 mol of toluene was added. After the temperature was raised to 110 °C, 1.1 mol of methyl oleate was added dropwise. The dropwise addition time was controlled at 7 hours. After the dropwise addition, the reaction was continued for 3 hours. , cooled to room temperature, left to stand for stratification, rinsed three times with ice water, separated the aqueous solution of the lower layer catalyst, recovered and stored, the upper layer liquid was washed with ice water three times, dried in turn, at 20Pa, 220 ℃, molecular distillation to obtain tolyl Methyl octadecanoate.

[0104] (2) Hydrogenation reduction reaction:

[0105] Under the reaction cond...

Example Embodiment

[0118] Example 3

[0119] The present embodiment provides a m-xylyl octadecyl polyoxyethylene ether (x) amine oxide amphoteric surfactant, and its synthesis method includes the following steps:

[0120] (1) Fourier alkylation reaction:

[0121] In the sealed reaction kettle, use methanesulfonic acid as a catalyst, add 3.5mol m-xylene, and after the temperature rises to 120 °C, start to drip 1.05mol methyl oleate, the dripping time is controlled at 7h, after the dripping is completed, continue The reaction was carried out for 4 hours, cooled to room temperature, left to stand for stratification, rinsed with ice water three times, the aqueous solution of the lower layer catalyst was separated, recovered and stored, the upper layer liquid was washed with ice water three times, dried in turn, and obtained by molecular distillation at 30Pa and 230°C. Methyl m-xylyl octadecanoate.

[0122] (2) Hydrogenation reduction reaction:

[0123] Under the reaction conditions of 200-350 ° C...

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Abstract

The invention provides an aryl alkyl polyoxyethylene ether amine oxide surfactant and a preparation method and application thereof. The aryl alkyl polyoxyethylene ether amine oxide surfactant has the structural formula shown in the specification, wherein R is phenyl, cresyl, dimethylphenyl or ehtylphenyl; m and n are selected from integers of 0 to 15 respectively, the sum of m and n is 15, and integer x is an integer of 1 to 30. The invention further provides a preparation method of the aryl alkyl polyoxyethylene ether amine oxide surfactant and application of the aryl alkyl polyoxyethylene ether amine oxide surfactant to tertiary oil recovery. An aqueous solution of the aryl alkyl polyoxyethylene ether amine oxide surfactant provided by the invention has relatively high viscosity, can improve the swept volume, can reduce the interfacial tension, has good emulsifying performance and can reduce the viscosity of high-viscosity crude oil, so that the recovery ratio is improved; therefore, the aryl alkyl polyoxyethylene ether amine oxide surfactant has a good application prospect in the tertiary oil recovery.

Description

technical field [0001] The invention relates to an aryl alkyl polyoxyethylene ether amine oxide surfactant, a preparation method and application, and belongs to the technical field of petroleum exploitation. Background technique [0002] At present, the reserves of low-permeability reservoirs are increasing continuously, which is the focus of future development of oilfields. And as the development of low-permeability oilfields continues to deepen, the problems of rising water cut, declining production, and low recovery (about 20%) are becoming increasingly apparent, and we are faced with the challenge of how to achieve stable production and increase recovery. There is an urgent need to develop a replacement technology that can greatly increase oil recovery. Chemical flooding technology is an important technical means to enhance the recovery of low permeability reservoirs. The key technology is to develop a single oil displacement agent with low molecular weight, good injec...

Claims

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Application Information

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IPC IPC(8): B01F17/42C09K8/584C08G65/338C08G65/28C09K23/42
Inventor 张帆马德胜杨思玉吴康云周新宇
Owner PETROCHINA CO LTD
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