Aryl alkyl polyoxyethylene ether carboxyl betaine surfactant and preparation method and application thereof

An aryl alkyl polyoxyethylene ether carboxyl group and surfactant technology, which is applied in the field of petroleum exploitation, can solve the problems of increased processing capacity, increased difficulty in demulsification and dehydration of heavy oil, poor adaptability of emulsified viscosity reducers, etc. The effect of sweep volume, good application prospect, good emulsifying 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

However, the adaptability of the emulsified viscosity reducer is poor. Usually, one viscosity reducer is only suitable for one kind of heavy oil, and a large amount of water needs to be added during mining, which

Method used

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  • Aryl alkyl polyoxyethylene ether carboxyl betaine surfactant and preparation method and application thereof
  • Aryl alkyl polyoxyethylene ether carboxyl betaine surfactant and preparation method and application thereof
  • Aryl alkyl polyoxyethylene ether carboxyl betaine surfactant and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0078] This embodiment provides N-[phenyl octadecyl polyoxyethylene ether (x)-2-hydroxypropyl]-N,N-dimethylcarboxybetaine amphoteric surfactant, and its synthesis method includes the following steps :

[0079] (1) Fu's alkylation reaction:

[0080] 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.

[0081] (2) Hydrogenation reduction reaction:

[0082] Under the reaction conditions of 200 ° C and 25-30 MPa, the reaction product...

Embodiment 2

[0098] This embodiment provides N-[cresyl octadecyl polyoxyethylene ether (x)-2-hydroxypropyl]-N,N-dimethylcarboxybetaine amphoteric surfactant, and its synthesis method includes the following steps :

[0099] (1) Fu's alkylation reaction:

[0100] 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.

[0101] (2) Hydrogenation reduction reaction:

[0102] Under the reaction conditions of 250°C and 25-30MPa, the reaction product of step (1) tol...

Embodiment 3

[0115] This embodiment provides N-[m-xylyl octadecyl polyoxyethylene ether (x)-2-hydroxypropyl]-N,N-dimethylcarboxybetaine amphoteric surfactant, and its synthesis method includes The following steps:

[0116] (1) Fu's alkylation reaction:

[0117] 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.

[0118] (2) Hydrogenation reduction reaction:

[0119] Under the reaction conditions of 200-350°C and 25-30MPa, the reacti...

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Abstract

The invention provides an aryl alkyl polyoxyethylene ether carboxyl betaine surfactant and a preparation method and application thereof. The aryl alkyl polyoxyethylene ether carboxyl betaine 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 carboxyl betaine surfactant and application of the aryl alkyl polyoxyethylene ether carboxyl betaine surfactant to tertiary oil recovery. An aqueous solution of the aryl alkyl polyoxyethylene ether carboxyl betaine 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 carboxyl betaine surfactant has a good application prospect in the tertiary oil recovery.

Description

technical field [0001] The invention relates to an aryl alkyl polyoxyethylene ether carboxy betaine surfactant, a preparation method thereof and an application in oil extraction, belonging to the technical field of oil extraction. Background technique [0002] There are abundant high-viscosity and low-mobility reservoir resources at home and abroad, among which the reservoirs with a permeability of 1-200mD and a viscosity of 20-500mPa·s in the Songliao Basin of my country have reserves of several billion tons. However, due to the high content of wax, colloid and asphaltene in crude oil and low formation temperature, the viscosity of crude oil is high and development is difficult. How to effectively improve the fluidity of crude oil is the main research direction for greatly improving the recovery of low-permeability and high-viscosity oil reservoirs. [0003] For the development of ordinary heavy oil with medium and high permeability, chemical flooding routes, polymer flood...

Claims

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Application Information

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IPC IPC(8): C09K8/584C08G65/337C08G65/333C08G65/28C07C229/12C07C227/08
CPCC07C227/08C07C229/12C08G65/2609C08G65/33306C08G65/337C08G2650/50C09K8/584
Inventor 张帆蔡红岩张群周朝辉田茂章宣英龙
Owner PETROCHINA CO LTD
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