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.
CN111533671BActive Publication Date: 2021-09-24陕西氢晨新材科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
陕西氢晨新材科技有限公司
Publication Date
2021-09-24

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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.
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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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