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A kind of method for preparing gemini surfactant

A Gemini surfactant and active agent technology, which is applied in the field of one-pot preparation of Gemini surfactants, can solve the problems of large energy consumption, high cost, complex reaction operation, etc., and achieve the effect of less usage, simple operation and simple reaction process

Active Publication Date: 2018-09-04
HIGH & NEW TECH RES CENT OF HENAN ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this synthesis method has disadvantages: the reaction undergoes a process of heating-cooling-reheating, which leads to large energy consumption and high cost in the entire reaction process; in addition, the two-step reaction operation is also relatively complicated

Method used

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  • A kind of method for preparing gemini surfactant
  • A kind of method for preparing gemini surfactant
  • A kind of method for preparing gemini surfactant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Molar ratio: stearic acid: oleic acid: 4-amino-N, N-dimethylaniline: [BMIM] BF 4 :1,3-dichloro-2-propanol=2:1:1.5:0.03:3, V 乙二醇 :V 丙二醇 =1:1, the quality of the solvent is 10% of the total mass of the reactants and the raw materials are prepared. In the reaction kettle equipped with electric stirrer, condenser, thermometer and oil bath heating condition, add stearic acid, oleic acid, 4-amino-N, N-dimethylaniline, l, 3-Dichloro-2-propanol, [BMIM]BF 4 , ethylene glycol, propylene glycol, stir and heat up to 50°C, keep the temperature for 1 hour; stir to 70°C, keep the temperature for 6 hours; stir and heat up to 110°C, keep the temperature for 8 hours; cool to room temperature, the obtained reddish brown The liquid is the gemini surfactant of the present invention.

[0022] The clean fracturing fluid Y1 can be obtained by mixing the Gemini surfactant into an aqueous solution with a mass concentration of 1% and an ammonium chloride solution with a mass concentration of ...

Embodiment 2

[0024] Molar ratio: stearic acid: erucic acid: 2-amino-N,N-dimethylacetamide: [BMIM]OH: 1,3-dibromo-2-propanol=2:1.5:2:0.035 :3, V 丁二醇 :V 丙三醇 =1:1.5, the amount of solvent added is 20% of the total mass and the raw materials are prepared. Have your ingredients ready. In a reaction kettle equipped with an electric stirrer, a condenser, a thermometer and heated by an oil bath, add stearic acid, erucic acid, 2-amino-N,N-dimethylacetamide, l , 3-dichloro-2-propanol, [BMIM]OH, glycerin, butanediol, stir and heat up to 60°C, keep the temperature for 1 hour; stir and heat up to 80°C, keep the temperature for 7 hours; stir and heat up To 120°C, keep the temperature and react for 9 hours; cool to room temperature, the obtained reddish-brown liquid is the gemini surfactant of the present invention.

[0025] The clean fracturing fluid Y2 can be obtained by mixing the gemini surfactant into an aqueous solution with a mass concentration of 2% and an ammonium chloride solution with a ma...

Embodiment 3

[0027] Molar ratio: benzenesulfonic acid: oleic acid: 4-methyl-N,N-dimethylphenylacetamide: [HDBU]PF 6 :1,3-dibromo-2-propanol=1:2:2:0.03:3, V 乙二醇 :V 丁二醇 =1.2:1, the amount of solvent added is 10% of the total mass and the raw materials are prepared. Add benzenesulfonic acid, oleic acid, and 4-methyl-N,N-dimethylphenylacetamide in the above molar ratio to the reaction kettle equipped with electric stirrer, condenser, thermometer and oil bath , l,3-dichloro-2-propanol, [HDBU]PF 6 , ethylene glycol, butanediol, stirred and heated to 50°C, kept the temperature for 2 hours; stirred to 60°C, kept the temperature for 9 hours; stirred and heated to 120°C, kept the temperature for 10 hours; cooled to room temperature, obtained The reddish-brown liquid is the gemini surfactant of the present invention.

[0028] The clean fracturing fluid Y3 can be obtained by mixing the Gemini surfactant into an aqueous solution with a mass concentration of 3% and an ammonium chloride solution with...

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Abstract

The invention discloses a method for preparing a gemini surfactant by a one-pot method and belongs to the field of organic chemical synthesis. The method for preparing the gemini surfactant by the one-pot method is characterized in that the gemini surfactant is synthesized from organic acids, N,N-dimethyl amine compounds and halogenated alcohols with ionic liquid serving as a catalyst and polyalcohols serving as solvents through the one-pot method. Compared with a traditional two-step method for preparing the gemini surfactant, the method has the advantages that the method is simple in preparation technology, simple and convenient to operate, low in energy consumption and cost and extremely suitable for industrial production. When used for preparing oil-field clean fracturing fluid by serving as a thickening agent, the gemini surfactant has the advantages of high resistance to temperature and shearing, excellent sand-carrying performance without addition of a gel breaker and reverse discharging and the like.

Description

technical field [0001] The invention relates to a one-pot method for preparing gemini surfactants, belonging to the technical field of chemical synthesis. Background technique [0002] Fracturing technology is an important means to improve the production capacity of low-permeability oil and gas reservoirs and the recovery of oil and gas wells, and fracturing fluid is the key factor affecting the fracturing effect. In recent years, clean fracturing fluid has attracted people's attention due to its advantages of low damage, low residue, low pollution, and high temperature resistance. The key to the preparation of clean fracturing fluid lies in the preparation of gemini surfactants as thickeners. [0003] At present, the preparation of gemini surfactants is realized by a two-step method. First, stearic acid and N,N-dimethylaminopropylamine are heated to 130-140°C for 6-12h under the catalysis of sodium ethoxide, and then cooled to room temperature. The corresponding amide inte...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C231/02
CPCC07C213/04C07C231/02C07C231/12C07C231/14C07C303/28C09K8/665C09K8/68C09K2208/30C07C215/40C07C233/43C07C233/44C07C237/50C07C309/73
Inventor 郭辉张国宝庄玉伟曹健赵根锁
Owner HIGH & NEW TECH RES CENT OF HENAN ACAD OF SCI
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