Multi-sulfo surfactant as well as preparation method and application thereof

A technology of surfactants and polysulfonic acid groups, which is applied in the direction of sulfonate preparation, carboxylic acid halide preparation, chemical instruments and methods, etc., and can solve the problem of insufficient surface activity

Active Publication Date: 2020-08-14
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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  • Multi-sulfo surfactant as well as preparation method and application thereof
  • Multi-sulfo surfactant as well as preparation method and application thereof
  • Multi-sulfo surfactant as well as preparation method and application thereof

Examples

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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] 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...

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Abstract

The invention discloses a multi-sulfo surfactant as well as a preparation method and application thereof. The method comprises the following steps: 1) dissolving dipentaerythritol in a first solvent,adding triethylamine, stirring and heating to 50-60 DEG C, dropwise adding perfluorovaleryl fluoride while stirring, continuously heating to 75-85 DEG C, stirring and reacting for 4-6 hours, washing the product, and performing extraction to obtain a faint yellow solid; 2) dissolving the faint yellow solid in a second solvent, adding sodium hydroxide after the faint yellow solid is completely dissolved, stirring and reacting at 25-35 DEG C for 0.5-1 hour, adding a sulfonate solution, heating to 75-85 DEG C, carrying out heat preservation for a period of time, and carrying out suction filtrationon a reaction product to obtain a solid, namely a product; and 3) adding a catalyst and a third solvent into the obtained solid product, dropwise adding diisocyanate, reacting for 3-5 hours at the reaction temperature of 40-60 DEG C, and drying in vacuum to obtain the multi-sulfo surfactant. The surfactant solves the problem that the surface activity is not high enough due to short fluorocarbon fragments, and the surfactant is used as a chemical oil displacement agent to improve the recovery ratio 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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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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