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Sulfonic acid-based anionic gemini surfactant and preparation method thereof

A Gemini surface, anion technology, applied in chemical instruments and methods, dissolution, drilling composition, etc., can solve the problems of easy adsorption by clay surface, low temperature and salt resistance, poor rock wetting and reversal effect, etc. , to achieve excellent surface activity, good wettability, and meet the effect of temperature resistance

Active Publication Date: 2020-06-30
佛山市天宝利硅工程科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, the application provides a sulfonic acid-based anionic gemini surfactant and a preparation method thereof, which solves the problem that the performance of the existing sulfonic acid-based anionic surfactants cannot meet engineering requirements, and it is difficult to achieve ultra-low interfacial tension, temperature resistance, The performance of salt is low, it is easy to be adsorbed by the clay surface, and the wetting and inversion effect on rocks is poor, which overcomes the shortcomings of existing surfactants

Method used

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  • Sulfonic acid-based anionic gemini surfactant and preparation method thereof
  • Sulfonic acid-based anionic gemini surfactant and preparation method thereof
  • Sulfonic acid-based anionic gemini surfactant and preparation method thereof

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preparation example Construction

[0058] The application also provides a preparation method of a sulfonic acid group anionic gemini surfactant, comprising the steps of:

[0059] 1) In the presence of the first catalyst, the siloxane and the terminal acrylate are subjected to the first catalytic reaction for 4h to 5h at 70-90°C, and the molar ratio of siloxane to the terminal acrylate is 1:(1.1~1.5 ), the concentration of the first catalyst is 0.002 to 0.004% molar equivalent, preferably further vacuum distillation to obtain the first reaction intermediate, wherein the first catalyst is a platinum catalyst, and the platinum catalyst is more specifically chloroplatinic acid;

[0060]

[0061] 2) In an inert atmosphere, the first reaction intermediate is saponified in a sodium hydroxide solution for 4h to 5h at 25 to 40°C, wherein the molar ratio of the first reaction intermediate to sodium hydroxide is 1:(3- 8), then cooling, using 5wt% hydrochloric acid to adjust the pH value to 5, preferably followed by suc...

Embodiment 1

[0072] Ethylene-bis(N-ethylsulfonate-nonamethyltrialkoxyalkylamide)

[0073]

[0074] This embodiment provides the preparation method of the sulfonic acid group anionic gemini surfactant (ethylene-bis(N-ethylsulfonate-nonamethyltrialkoxypropionamide)) of the present application, which specifically includes the following steps:

[0075] 1) Synthesis of nonamethyltrisiloxane methyl propionate

[0076] Add 1mol nonamethyltrisiloxane and 1.2mol methyl acrylate into the reactor, heat up to 80°C under stirring, add chloroplatinic acid, carry out the first catalytic reaction for 4 hours, and distill under reduced pressure to obtain nonamethyltrisiloxane Methyl siloxane propionate;

[0077] 2) Synthesis of nonamethyltrisiloxane propionic acid

[0078] Under the protection of nitrogen, add 1mol nonamethyltrisiloxane methyl propionate, 4.0mol sodium hydroxide and 2000mL distilled water to the reactor, carry out 4h saponification reaction at room temperature, adjust the pH to 5 with...

Embodiment 2

[0086] In this embodiment, the first reaction intermediate, the second reaction intermediate and the target product ethylene-bis(N-ethylsulfonate-nonamethyltrialkoxypropionamide) in the preparation process of Example 1 were infrared Spectral characterization, see results in Figure 1 to Figure 3 .

[0087] figure 1 (Namethyltrisiloxane methyl propionate): 3091.19cm -1 and 3090.08cm -1 Respectively CH 3 The antisymmetric stretching and plane rocking vibration peaks of ; 3051.03cm -1 and 3027.72cm -1 for -CH 2 -The antisymmetric and symmetric stretching vibration peaks; 1780.35cm -1 and 1328.14cm -1 It is the in-plane stretching vibration peak of C=O in -COOH; 1298.07cm -1 for -CH 2 - peaks of in-plane bending vibration and plane rocking vibration, 1064.04cm -1 The stretching vibration absorption peak of Si—O—Si (the peak is wide and strong), 874.20cm -1 It is the strong absorption peak of Si-C stretching vibration.

[0088] figure 2 (Namethyltrisiloxane propionic...

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Abstract

The invention belongs to the technical field of surfactants, and particularly relates to a sulfonic acid-based anion gemini surfactant and a preparation method thereof. The surfactant has a structurerepresented by a formula (I), wherein A is an alkyl group, a substituted alkyl group, an ether group, a phenyl group or a substituted phenyl group, R1 is an alkyl group or a phenyl group, X is a methyl group or a phenyl group, n is an integer of 2-10, a is an integer of not less than 1, and the sum of a and b is 3. The sulfonic acid-based anionic gemini surfactant disclosed by the invention has asulfonic acid-based hydrophilic chain and a siloxane hydrophobic chain at the same time, is excellent in surface activity and high in wettability, can meet the requirements of temperature resistance,salt resistance and calcium and magnesium resistance, and can be used for effectively wetting and reversing rocks.

Description

technical field [0001] The application belongs to the technical field of surfactants, and in particular relates to a sulfonic acid anionic gemini surfactant and a preparation method thereof. Background technique [0002] In the current tertiary oil extraction process, a large amount of surfactants are required. The most basic function of these surfactants is to reduce the oil-water interfacial tension and activate the residual oil in the rock pores. Therefore, they must meet the characteristics of low interfacial tension, low adsorption capacity, high solubilization parameters, compatibility with the underlying fluid, wide sources, and low cost. [0003] As the most commonly used tertiary oil recovery surfactants, sulfonic acid anionic surfactants still have many disadvantages, such as: the performance cannot meet the engineering requirements, it is difficult to achieve ultra-low interfacial tension, the temperature resistance and salt resistance are low, and it is easy to b...

Claims

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Application Information

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IPC IPC(8): B01F17/54C09K8/584C09K23/54
CPCC09K8/584C09K23/00
Inventor 田磊张必宏
Owner 佛山市天宝利硅工程科技有限公司
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