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A kind of polysulfonic acid-based surfactant and its preparation method and application

A technology of surfactant and polysulfonic acid group, which can be used in the preparation of sulfonate, the preparation of carboxylic acid halide, chemical instruments and methods, etc., and can solve the problem of insufficient surface activity.

Active Publication Date: 2021-09-24
陕西氢晨新材科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This invention obviously solves the problem that the surface activity is not high enough due to the short fluorocarbon chain segment. The diisocyanate cross-linked fluorocarbon gemtaine surfactant is used as a chemical oil displacement agent to improve the recovery of crude oil in tertiary oil recovery.

Method used

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  • A kind of polysulfonic acid-based surfactant and its preparation method and application
  • A kind of polysulfonic acid-based surfactant and its preparation method and application
  • A kind of polysulfonic acid-based surfactant and its preparation method and application

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preparation example Construction

[0028] Concrete, a kind of preparation method of polysulfonic acid-based surfactant, comprises the following steps:

[0029] (1) Dissolve dipentaerythritol in dimethylformamide to obtain a dipentaerythritol solution, add triethylamine, stir and heat to 50-60°C, and add perfluorovaleryl fluoride dropwise while stirring. Wherein the molar ratio of dipentaerythritol to perfluorovaleryl fluoride is 1:(3-3.2). After the dropwise addition, continue to heat up to 75-85°C, and stir for 4-6 hours. The resulting product was first washed twice with 5% HCl solution, and then washed with 5% NaHCO 3 The solution was washed once, washed with water, extracted with ether, separated by liquid separation to obtain the upper organic layer, and the solvent was distilled off under reduced pressure to obtain a light yellow solid.

[0030] (2) Dissolve the light yellow solid obtained in step 1 in dimethyl sulfoxide (DMSO) and add it to a four-necked flask. After it is completely dissolved, add abou...

Embodiment 1

[0036] Equipped with a stirrer, thermometer, dropping funnel and reflux condenser (anhydrous CaCl 2 Drying tube) In a dry 250mL four-neck flask, dissolve dipentaerythritol in dimethylformamide to obtain a dipentaerythritol solution, add triethylamine and stir to heat to 55°C, then add perfluorovaleryl fluoride dropwise while stirring. The molar ratio of dipentaerythritol to perfluorovaleryl fluoride is 1:3. After the dropwise addition was completed, the temperature was continued to rise to 80° C., and the reaction was stirred for 5 h. The resulting product was first washed twice with 5% HCl solution, and then washed with 5% NaHCO 3 The solution was washed once, washed with water, extracted with ether, separated by liquid separation to obtain the upper organic layer, and the solvent was distilled off under reduced pressure to obtain a light yellow solid. Dissolve the obtained pale yellow solid in dimethyl sulfoxide (DMSO) and add it to a four-necked flask. After it is complet...

Embodiment 2

[0039] Install a stirrer, a thermometer, a dropping funnel and a reflux condenser (an anhydrous CaCl 2 In a dry 250mL four-necked flask, dissolve bis-pentaerythritol in dimethylformamide to obtain a bis-pentaerythritol solution, add triethylamine and stir to heat to 55°C, and add perfluorovaleryl fluoride dropwise while stirring. The molar ratio of dipentaerythritol to perfluorovaleryl fluoride was 1:3. After the dropwise addition was completed, the temperature was continued to rise to 80 °C, and the reaction was stirred for 5 h. The obtained product was washed twice with 5% HCl solution, and then with 5% NaHCO 3 The solution was washed once, washed with water and then extracted with ether. The upper organic layer was obtained by liquid separation, and the solvent was distilled off under reduced pressure to obtain a pale yellow solid. The obtained pale yellow solid was dissolved in dimethyl sulfoxide (DMSO) and added to a four-necked flask. After all dissolved, about 2 g of ...

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Abstract

The invention discloses a polysulfonic acid-based surfactant and its preparation method and application. The method comprises: 1) dissolving dipentaerythritol in a first solvent, adding triethylamine, stirring and heating to 50-60°C, and dripping while stirring; Add perfluorovaleryl fluoride, then continue to heat up to 75-85°C, stir and react for 4-6 hours, wash and extract the product to obtain a light yellow solid; 2) Dissolve the light yellow solid in the second solvent, and add hydrogen after it is completely dissolved Sodium oxide was stirred and reacted at 25-35°C for 0.5-1h, then added sulfonate solution and heated to 75-85°C, and after a period of heat preservation, the reaction product was suction-filtered to obtain a solid as the product; 3) the obtained solid The product is added with a catalyst and a third solvent, and diisocyanate is added dropwise, the reaction temperature is 40-60° C., the reaction is 3-5 hours, and vacuum drying is performed to obtain a polysulfonic acid-based surfactant. The surfactant solves the problem of insufficient surface activity due to short fluorocarbon segments, and the surfactant is used as a chemical oil displacement agent to improve the recovery rate of crude oil in tertiary oil recovery.

Description

technical field [0001] The invention relates to the technical field of polysulfonic acid-based surfactants, in particular to a polysulfonic acid-based surfactant and its preparation method and application Background technique [0002] In recent years, fluorocarbon surfactants developed at home and abroad are mainly perfluorooctyl sulfonyl compounds (PFOS), but due to the poor degradability of PFOS, it has been banned by various countries. [0003] Fluorocarbon surfactants are by far the most active of all surfactants. Its high surface activity can reduce the surface tension of water (or organic solvent) to a very low value on the one hand, and on the other hand, it can play a significant role when it is used in a small amount. In addition, fluorocarbon surfactants also have extremely high stability, "biphobic" characteristics, environmental compatibility and other characteristics. Therefore, fluorocarbon surfactants have great application potential in the field of tertiary...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C303/32C07C309/10C07C67/14C07C69/63C09K8/584
CPCC07C67/14C07C69/63C07C303/32C07C309/10C09K8/584
Inventor 王晨王江涛杨晓武李刚辉
Owner 陕西氢晨新材科技有限公司
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