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Preparation of surface active agent of double long-chain alkyl amine oxide and applications thereof

A surfactant, double long-chain alkyl technology, applied in the field of colloid and interface chemistry, can solve the problem of inability to reduce the oil/water interfacial tension to ultra-low, and achieve the effect of improving oil recovery.

Inactive Publication Date: 2011-05-11
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, ordinary cheap surfactants used in ASP flooding, such as petroleum sulfonate, heavy alkylbenzene sulfonate, natural carboxylate, petroleum carboxylate and lignin sulfonate, etc. Crude oil / water interfacial tensions often cannot be reduced to ultra-low levels, requiring the development of new surfactants

Method used

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  • Preparation of surface active agent of double long-chain alkyl amine oxide and applications thereof
  • Preparation of surface active agent of double long-chain alkyl amine oxide and applications thereof
  • Preparation of surface active agent of double long-chain alkyl amine oxide and applications thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0026] The preparation of didecylmethyl amine oxide: react with didecylmethyl tertiary amine (product of Feixiang Chemical Co., Ltd.) and hydrogen peroxide in the presence of catalyst sodium edetate, the reaction medium is water, and the reaction temperature is 90 ℃, the molar ratio of hydrogen peroxide: tertiary amine is (1.1): 1, the catalyst consumption is 1% (relative to tertiary amine), the reaction time is 6 hours, and the conversion rate of tertiary amine is 80.5%. After the reaction, the aqueous phase is separated, and the upper layer is the product, which contains a small amount of unreacted tertiary amine.

[0027] The preparation of didodecanylmethyl amine oxide: react with didodecanylmethyl tertiary amine (product of Feixiang Chemical Co., Ltd.) and hydrogen peroxide in the presence of catalyst sodium ethylenediaminetetraacetate, the reaction medium is water, and the reaction temperature is The temperature is 95° C., the molar ratio of hydrogen peroxide: tertiary a...

Embodiment 2

[0033] The prepared didecyl methyl amine oxide is compounded with a sulfonate type anionic surfactant, and the molar fraction of the didecyl methyl amine oxide is 0.5. The mixed surfactant was dissolved in Daqing formation water containing 1000ppm polyacrylamide, the total surfactant concentration (mass fraction) was 0.1% and 0.3%, respectively, and the interfacial tension with Daqing crude oil was measured at 45°C. Under the condition of no alkali and no addition of electrolyte, the equilibrium interfacial tension can be reduced to 10 -3 mN / m order of magnitude, such as Figure 4 shown.

Embodiment 3

[0035]The prepared didodecyl methyl amine oxide is compounded with a sulfonate type anionic surfactant, and the mole fraction of the didodecyl methyl amine oxide is 0.2. The mixed surfactant was dissolved in Daqing formation water containing 1000ppm polyacrylamide, the total surfactant mass fraction was 0.3%, and the interfacial tension with Daqing crude oil was measured at 45°C. Under the condition of no alkali and no addition of electrolyte, the equilibrium interfacial tension can be reduced to 10 -3 mN / m order of magnitude, such as Figure 5 shown.

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Abstract

The invention relates to preparation of a surface active agent of double long-chain alkyl amine oxide and applications thereof, belonging to the field of colloid and interface chemistry. The surface active agent is prepared by reaction of double long-chain alkyl methyl tertiary amine and hydrogen peroxide (H2O2) and is a nonionic surface active agent and the number of carbon atoms of the long-chain alkyl is 8 to 18. By being used by combination with other surface active agents, the surface active agent can be used as an alkali-free oil-displacing agent; under the conditions that the molar fraction of the surface active agent of double long-chain alkyl lycine is 0.1 to 0.6, the total mass concentration of the active surface agent is 0.05 percent to 0.3 percent, 1000mg / L (ppm) of polyacrylamide is added, alkali is not added and the temperature is 45 DEG C, the surface active agent of double long-chain alkyl amine oxide can reduce the interfacial tension of Daqing crude oil / formation water interface to 10<-3>mN / m order of magnitude.

Description

technical field [0001] The preparation and application of a double long-chain alkyl amine oxide surfactant belongs to the field of colloid and interface chemistry. The double-long-chain alkyl amine oxide surfactant involved in the present invention is prepared by reacting double-long-chain alkyl methyl tertiary amine with hydrogen peroxide, and the carbon number of the long-chain alkyl is 8-18. By compounding with other surfactants, it can be used as an alkali-free oil displacement agent. Under the conditions of 45°C and 0.05%-0.3% mass fraction of total surfactant, the interfacial tension of Daqing crude oil / formation water can be reduced to 10 without adding alkali -3 mN / m order of magnitude. Background technique [0002] With the rapid development of my country's economy and the continuous improvement of people's living standards, my country's oil consumption has increased sharply, while domestic oil production is far from meeting the demand. In 2007, my country's oil ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01F17/18C09K8/584C09K23/18
Inventor 崔正刚孔云蒋建中王峰张天林许园园
Owner JIANGNAN UNIV
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