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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

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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 recovery (about 20%) are becoming increasingly apparent, and we are faced with the challenge of how to achieve stable production and increase recovery

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

Experimental program
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Effect test

Embodiment 1

[0081] This embodiment provides a kind of phenyl octadecyl polyoxyethylene ether (x) amine oxide amphoteric surfactant, and its synthetic method comprises the following steps:

[0082] (1) Fu's alkylation reaction:

[0083] In a sealed reactor, use methanesulfonic acid as a catalyst, add 3.5mol of benzene, after the temperature rises to 100°C, start to drop 1mol of methyl oleate, the dropping time is controlled at 6h, after the dropping is completed, continue to react for 3h, Cool to room temperature, stand to separate layers, rinse with ice water three times, separate the aqueous solution of the catalyst in the lower layer, recover and store, continue to wash the upper layer with ice water three times, and dry in turn. Under the conditions of 20Pa and 220°C, 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) phenyl octade...

Embodiment 2

[0101] This embodiment provides a kind of cresyl octadecyl polyoxyethylene ether (x) amine oxide amphoteric surfactant, and its synthetic method comprises the following steps:

[0102] (1) Fu's alkylation reaction:

[0103] In a sealed reactor, use methanesulfonic acid as a catalyst, add 3.5mol of toluene, after the temperature rises to 110°C, start to add 1.1mol of methyl oleate dropwise, the dropping time is controlled at 7h, after the dropwise addition, continue to react for 3h , cooled to room temperature, left to separate layers, rinsed with ice water three times, separated the aqueous solution of the catalyst in the lower layer, recovered and stored, the upper liquid was washed three times with ice water, dried in turn, and molecularly distilled at 20Pa and 220°C to obtain tolyl methyl octadecanoate.

[0104] (2) Hydrogenation reduction reaction:

[0105] Under the reaction conditions of 250°C and 25-30MPa, the reaction product of step (1) tolyl octadecanoic acid methy...

Embodiment 3

[0119] This embodiment provides a kind of m-xylyl octadecyl polyoxyethylene ether (x) amine oxide amphoteric surfactant, and its synthetic method comprises the following steps:

[0120] (1) Fu's alkylation reaction:

[0121] In a sealed reaction kettle, use methanesulfonic acid as a catalyst, add 3.5mol m-xylene, after the temperature rises to 120°C, start to add 1.05mol methyl oleate dropwise, the dropping time is controlled at 7h, after the dropping is completed, continue React for 4 hours, cool to room temperature, let stand to separate layers, rinse with ice water three times, separate the aqueous solution of the catalyst in the lower layer, recover and store, continue to wash the upper layer liquid with ice water three times, dry sequentially, and molecularly distill at 30Pa and 230°C to obtain Methyl m-xylyl octadecanoate.

[0122] (2) Hydrogenation reduction reaction:

[0123] Under the reaction conditions of 200-350°C and 25-30MPa, the reaction product m-xylyl octade...

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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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