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Dual-carboxylate gemini surfactant resistant to high temperature and high salt and preparation method thereof

A technology of salt dicarboxylate and gemini surface, which is applied in the field of high temperature-resistant high-salt dicarboxylate gemini surfactant and its preparation, and can solve the problem of alkali corrosion and scaling damage in ASP flooding, high use concentration, Poor oil displacement efficiency and other problems, to achieve unique rheology and viscoelasticity-viscosity effect, strong ability to reduce interfacial tension, and excellent performance

Active Publication Date: 2011-10-19
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] One of the technical problems to be solved by the present invention is that the oil displacement agent containing surfactant in the prior art has poor oil displacement efficiency under high temperature and high salinity conditions, high use concentration and the impact of alkali on formation and oil well in ASP flooding. Corrosion and fouling damage problems, providing a new N,N-bis fatty acid acyl diamine dipropionate dipolyoxyethylene ether dicarboxylate

Method used

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  • Dual-carboxylate gemini surfactant resistant to high temperature and high salt and preparation method thereof
  • Dual-carboxylate gemini surfactant resistant to high temperature and high salt and preparation method thereof
  • Dual-carboxylate gemini surfactant resistant to high temperature and high salt and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] (a) Synthesis of N, N-dilauroyl ethylenediamine dipropionic acid

[0042] 300 grams (1.5 moles) of lauric acid, 267.8 grams (2.25 moles) of thionyl chloride and 4.5 grams of DMF were added to a 1000-milliliter four-necked flask equipped with a sealed mechanical stirrer, a thermometer, a condenser tube, etc., and reacted at 90 ° C for 3 After one hour, excess thionyl chloride was distilled off under reduced pressure to obtain lauroyl chloride. Add 45.0 grams (0.75 moles) of anhydrous ethylenediamine and 180 grams of 1,4-dioxane to another 2000 ml four-neck flask equipped with a sealed mechanical stirrer, a thermometer, and a condenser tube, heat up to 50° C., and slowly Add 141.9 grams (1.65 moles) of methyl acrylate dropwise, continue the reaction for 3 hours after dropping, remove unreacted methyl acrylate and solvent 1,4-dioxane under reduced pressure, and the residue is methyl ethylenediamine dipropionate . Use 50wt% sodium hydroxide to adjust the pH of the reactio...

Embodiment 2

[0049] (a) Synthesis of N, N-dilauroyl hexamethylene diamine dipropionic acid

[0050] With [Example 1] (a), the difference replaces 45.0 grams (0.75 moles) of anhydrous ethylenediamine with 87.0 grams (0.75 moles) of anhydrous hexamethylenediamine, and the rest are the same to obtain N, N-dilauroyl Hexamethylenediamine dipropionic acid 328.5 grams, molar yield 70.2%.

[0051] (b) Synthesis of N,N-dilauroylhexamethylene diamine dipropionic acid dipolyoxyethylene ether (n=3)

[0052] With [Example 1] (b), the difference is 328.5 grams (0.578 moles) of N, N-dilauroyl hexamethylene diamine dipropionic acid instead of 300.3 grams (0.529 moles) of N, N-dodecanoyl ethyl The usage amount of diamine dipropionic acid and ethylene oxide is 152.7g (3.470 moles), and the usage amount of the basic compound of calcium is 8.6 grams, get) N, N-dilauroyl hexamethylene diamine dipropionic acid di Polyoxyethylene ether (n=3) 446.0 g, molar yield 86.9%.

[0053] (c) Synthesis of N, N-dilauroyl...

Embodiment 3

[0057] (a) Synthesis of N, N-didecanoyl butanediamine dipropionic acid

[0058] With [Example 1] (a), the difference replaces 300.0 grams (1.5 moles) of lauric acid with 261.0 grams (1.5 moles) of capric acid, and replaces 45.0 grams (0.75 grams) of anhydrous butanediamine with 66.0 grams (0.75 moles). mol) anhydrous ethylenediamine, and the others are the same to obtain 285.2 grams of N,N-didecanoylbutylene diamine dipropionic acid, and the molar yield is 69.9%.

[0059] (b) Synthesis of N, N-didecanoyl butanediamine dipropionic acid dipolyoxyethylene ether (n=3)

[0060] With [Example 1] (b), the difference is 285.2 grams (0.524 moles) of N, N-didecanoyl butanediamine dipropionic acid instead of 300.3 grams (0.529 moles) of N, N-dilauroyl ethylene dipropionate The consumption of amine dipropionic acid and oxirane is 138.3g (3.144 mole), and the consumption of the basic compound of calcium is 6.7 grams, obtains N, N-didecanoyl butanediamine dipropionic acid dipolyoxyethylene...

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Abstract

The invention relates to a dual-carboxylate gemini surfactant resistant to high temperature and high salt and a preparation method thereof, which mainly solve the problems that in the prior art, an oil displacement agent containing the surfactant has the defects of low oil displacement efficiency and high using concentration in high-temperature and high-salt conditions and alkali in the trinary alkali-surfactant-polymer flooding brings about corrosion and scale depositing to the stratum and oil wells. In the invention, a technical scheme of N, N-dual-fatty acyl diamine dioxin-propionic acid dioxin-polyoxyethylene ether dual-carboxylate with a general molecular formula shown in the specification is adopted and favorably solves the problem, wherein in the general molecular formula, M is selected from any one of metal ions of potassium, sodium or lithium, R1 is C9 to C17alkyl groups, R2 is C2 to C6 alkyl groups, n is an additive composite number of ethoxy groups (EP) and has the value range of any on integral number from 2 to 7; and the dual-carboxylate gemini surfactant resistant to high temperature and high salt can be applicable to the tertiary oil recovery of oil fields.

Description

technical field [0001] The invention relates to a high-temperature-resistant high-salt dicarboxylate gemini surfactant and a preparation method thereof, N, N-bis fatty acyl diamine dipropionate dipolyoxyethylene ether dicarboxylate and a preparation method thereof. Background technique [0002] Chemical flooding is the main method of tertiary oil recovery, and surfactant flooding is considered to be a chemical agent that can greatly increase oil recovery, has a wide range of applications, and has the most development prospects. Surfactant plays an inestimable role in greatly enhancing oil recovery, whether it is used as a main agent or as an auxiliary agent for oil displacement. [0003] The main mechanism for the use of surfactants to enhance oil recovery is: after the oil field enters the high water cut period, the remaining oil is trapped in the pores of the reservoir rock in a discontinuous oil film, and the two main mechanisms acting on the oil droplets The force is vi...

Claims

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Application Information

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IPC IPC(8): B01F17/44C09K8/588C09K23/44
Inventor 沈之芹王辉辉杨一青唐恒志
Owner CHINA PETROLEUM & CHEM CORP
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