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Polyoxyethylene sulfonate type dimeric surfactant and preparation method thereof

A technology of polyoxyethylene sulfonate and gemini surface, applied in the direction of chemical instruments and methods, dissolution, drilling compositions, etc., can solve the problems of surfactant resistance to salt and temperature resistance, etc., to improve crude oil The effects of recovery, mild reaction conditions, and easy availability of raw materials

Inactive Publication Date: 2017-11-24
PETROCHINA CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the technical problems that the existing surfactants are difficult to have salt resistance and temperature resistance at the same time, the purpose of the present invention is to provide a polyoxyethylene sulfonate type gemini surfactant and its preparation method

Method used

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  • Polyoxyethylene sulfonate type dimeric surfactant and preparation method thereof
  • Polyoxyethylene sulfonate type dimeric surfactant and preparation method thereof
  • Polyoxyethylene sulfonate type dimeric surfactant and preparation method thereof

Examples

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Embodiment 1

[0031] This embodiment provides a polyoxyethylene sulfonate type gemini surfactant, the structural formula of the polyoxyethylene sulfonate type gemini surfactant is as shown in formula (1):

[0032]

[0033] The present embodiment also provides the preparation method of above-mentioned polyoxyethylene sulfonate type gemini surfactant, it comprises the following steps:

[0034] (1) Preparation of di-nonylphenol: weigh p-nonylphenol and formaldehyde according to the molar ratio of 2:1, add p-nonylphenol to the flask, then add 0.495g of dihydrate oxalic acid, 0.325g to Ionized water and 0.185g of sodium dodecylbenzenesulfonate were added in batches of solid formaldehyde while the temperature was rising to 90°C, stirred and mixed evenly, then the temperature was raised to 120°C, connected to a water separator, and reacted for 4 hours. After the reaction, the product was extracted with dichloromethane, then dried and rotary evaporated, followed by column chromatography to purif...

Embodiment 2

[0039] This embodiment provides a polyoxyethylene sulfonate type gemini surfactant, the structural formula of the polyoxyethylene sulfonate type gemini surfactant is as shown in formula (2):

[0040]

[0041]The present embodiment also provides the preparation method of above-mentioned polyoxyethylene sulfonate type gemini surfactant, it comprises the following steps:

[0042] (1) Preparation of diheptylphenol: Weigh p-heptylphenol and formaldehyde according to the ratio of molar ratio of 2.5:1, add p-heptylphenol to the flask and then add 0.512g of dihydrate oxalic acid, 0.345g to Ionized water and 0.185g of sodium dodecylbenzenesulfonate were added in batches of solid formaldehyde while the temperature was rising to 90°C, stirred and mixed evenly, then the temperature was raised to 120°C, connected to a water separator, and reacted for 6 hours. After the reaction was completed, the product was extracted with dichloromethane, dried and rotary evaporated with anhydrous magn...

Embodiment 3

[0047] This embodiment provides a polyoxyethylene sulfonate type gemini surfactant, the structural formula of the polyoxyethylene sulfonate type gemini surfactant is as shown in formula (3):

[0048]

[0049] The present embodiment also provides the preparation method of above-mentioned polyoxyethylene sulfonate type gemini surfactant, it comprises the following steps:

[0050] (1) Preparation of didodecylphenol: weigh p-dodecylphenol and formaldehyde according to the molar ratio of 2.2:1, add p-dodecylphenol to the flask and then add 0.48g of didodecylphenol Hydrate oxalic acid, 0.33g deionized water and 0.17g sodium dodecylbenzenesulfonate, add solid formaldehyde in batches during the process of heating up to 90°C, stir and mix evenly, then raise the temperature to 120°C, connect the water separator, and react for 5h . After the reaction was completed, the product was extracted with dichloromethane, dried and rotary evaporated with anhydrous magnesium sulfate, and then p...

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Abstract

The invention provides a polyoxyethylene sulfonate type dimeric surfactant and a preparation method thereof. The structural formula of the polyoxyethylene sulfonate type dimeric surfactant is shown as a formula I, wherein n is equal to 6, 7, 8, 9, 10, 12 or 14; m is equal to 4, 5, 6, 7, 8, 9, 10, 15 or 20. The preparation method of the polyoxyethylene sulfonate type dimeric surfactant provided by the invention has the advantages of readily available raw materials, mild reaction conditions and simple preparation process, the prepared polyoxyethylene sulfonate type dimeric surfactant is high in purity and high in yield, has excellent salt resistance, high temperature resistance and other physical and chemical properties, and is capable of effectively improving the crude oil recovery rate when being applied to mining of high-temperature high-mineralization-degree complicated reservoir, thereby havingwide application prospects in the field of oil exploitation. The structural formula is as shown in the specification.

Description

technical field [0001] The invention belongs to the technical field of surfactants, and relates to a polyoxyethylene sulfonate type gemini surfactant and a preparation method thereof. Background technique [0002] In recent years, the study of Gemini surfactants, which link two traditional surfactant molecules through chemical bonds, is very active. Compared with traditional surfactants, Gemini surfactants have higher surface activity, very low Krafft point and good water solubility, and their molecular weight is usually between traditional surfactants and polymer surfactants. Known as a new generation of surfactants. [0003] According to different hydrophilic groups, Gemini surfactants are divided into anionic, cationic, nonionic and amphoteric, and anionic Gemini surfactants are further divided into sulfonate, sulfate, carboxylate and phosphate. The sulfonate-type Gemini surfactant has high activity, good thermal stability, good salt resistance, small interfacial adsorp...

Claims

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Application Information

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IPC IPC(8): B01F17/42B01F17/02C09K8/584C09K23/42C09K23/02
CPCC09K8/584C09K23/00
Inventor 刘治田周泽坤张旗王璇
Owner PETROCHINA CO LTD
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