Aryl alkyl polyoxyethylene ether sulphobetaine surfactant as well as preparation method and application thereof

A technology of aryl alkyl polyoxyethylene ether and sulfobetaine, which is applied in transportation and packaging, chemical instruments and methods, drilling compositions, etc., can solve the problems of poor adaptability, increased difficulty in demulsification and dehydration of heavy oil, To deal with problems such as increased capacity, to achieve the effect of reducing interfacial tension, good application prospects, and increasing swept volume

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 conventional emulsified viscosity reducers is poor. Usually, one viscosity reducer is only suitable for one type of heavy oil, and a large amount of water needs to be added dur

Method used

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  • Aryl alkyl polyoxyethylene ether sulphobetaine surfactant as well as preparation method and application thereof
  • Aryl alkyl polyoxyethylene ether sulphobetaine surfactant as well as preparation method and application thereof
  • Aryl alkyl polyoxyethylene ether sulphobetaine surfactant as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0077] Example 1

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

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

[0080] In a sealed reactor, use methanesulfonic acid as a catalyst and add 3.5 mol of benzene. After the temperature is raised to 100°C, start to drip 1 mol of methyl oleate. The dripping time is controlled at 6h. After the dripping is completed, continue the reaction for 3h. Cool to room temperature, stand still for stratification, rinse with ice water three times, separate the aqueous solution of the lower layer of catalyst, recover and save, continue to wash the upper layer liquid three times with ice water, and dry sequentially. Under the conditions of 20Pa and 220℃, molecular distillation obtains benzene Methyl octadecanoate.

[0081] (2) Hydrogenation reduction reaction:

[0082] Under the reaction conditions of 200°C a...

Example Embodiment

[0097] Example 2

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

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

[0100] In a sealed reactor, use methanesulfonic acid as a catalyst and add 3.5 mol toluene. After the temperature is raised to 110°C, start dripping 1.1 mol methyl oleate. The dripping time is controlled at 7h. After the dripping is completed, continue the reaction for 3h , Cool to room temperature, stand for stratification, rinse with ice water three times, separate the aqueous solution of the lower layer of catalyst, recover and save, continue to wash the upper layer liquid three times with ice water, and dry sequentially, at 20Pa, 220 ℃, molecular distillation 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 s...

Example Embodiment

[0114] Example 3

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

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

[0117] In a sealed reactor, use methanesulfonic acid as a catalyst and add 3.5 mol meta-xylene. After the temperature is raised to 120°C, start dripping 1.05 mol methyl oleate. The dripping time is controlled at 7 hours. After the dripping is completed, continue React for 4h, cool to room temperature, stand for layering, wash three times with ice water, separate the aqueous solution of the lower layer of catalyst, recover and save, continue to wash the upper layer with ice water three times, and dry sequentially, at 30Pa, 230℃, molecular distillation obtains Methyl m-xylyl octadecanoate.

[0118] (2) Hydrogenation reduction reaction:

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

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Abstract

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

Description

technical field [0001] The invention relates to an arylalkyl polyoxyethylene ether sulfobetaine surfactant for oil displacement, a preparation method thereof and an application in oil recovery, belonging to the technical field of oil recovery. Background technique [0002] Reservoirs with low permeability (1-200mD) and high viscosity (20-500mPa·s) are rich in resources. For example, the proven resources in the periphery of Daqing Changyuan and the Jilin exploration area have reached more than 3 billion tons. Taking Fuyu Oilfield in Jilin as an example, low-permeability and high-viscosity crude oil reserves are abundant, with proven geological reserves of about 200 million tons. Oilfield development The viscosity of crude oil tends to increase, making development more difficult. [0003] Due to the high viscosity of crude oil, the development effect is poor if the method of simple water injection or gas injection is used. How to effectively improve the fluidity of crude oil...

Claims

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Application Information

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IPC IPC(8): B01F17/04B01F17/42C09K8/584C08G65/337C08G65/333C08G65/334C08G65/28C09K23/04C09K23/42
Inventor 张帆王强罗文利王红庄朱友益
Owner PETROCHINA CO LTD
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