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Quaternary ammonium salt type surfactant containing symmetric heterocycle and synthesis method of surfactant

A technology of surfactant and synthesis method, which is applied in the direction of drilling compositions, chemical instruments and methods, organic chemistry, etc., can solve the problems of poor temperature resistance, single performance, and high cost, and achieve the effect of reducing costs

Active Publication Date: 2016-06-22
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although various new surface-active thickeners have been proposed one after another, they have some common problems, such as poor temperature resistance, generally between 60-90°C, large dosage and high cost, and single performance

Method used

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  • Quaternary ammonium salt type surfactant containing symmetric heterocycle and synthesis method of surfactant
  • Quaternary ammonium salt type surfactant containing symmetric heterocycle and synthesis method of surfactant
  • Quaternary ammonium salt type surfactant containing symmetric heterocycle and synthesis method of surfactant

Examples

Experimental program
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Effect test

Embodiment 1

[0022] Add 126mmol oleic acid, 60mmol 3,5-diamino-1,2,4-triazole and 20.9g ethylene glycol solvent into a three-necked flask, heat to 80°C under the protection of argon to melt, add 3mmol hydroxide Potassium, wherein the molar ratio of oleic acid: 3,5-diamino-1,2,4-triazole: potassium hydroxide is 2.1:1:0.05, and ethylene glycol is 50% of the total mass of the above reactants. Continue to raise the temperature to 150°C. After reacting for 12 hours, wash with 1% sodium carbonate hot water solution to remove unreacted oleic acid and solvent ethylene glycol. After drying, a yellow solid is obtained, which is intermediate A containing heterocyclic fatty acid amides.

[0023]

[0024] Add 40mmol of intermediate A, 20mmol of 1,3-dichloroisopropanol, 1mmol of sodium carbonate, and 13.9g of ethanol to another flask, wherein intermediate A: 1,3-dichloroisopropanol: of sodium carbonate The molar ratio is 2:1:0.05, and ethanol is 50% of the total mass of the above-mentioned reactants....

Embodiment 2

[0031] Add 126mmol of stearic acid, 60mmol of 3,5-diamino-1,2,4-triazole and 21g of ethylene glycol solvent into the three-necked flask. Potassium, wherein, the molar ratio of stearic acid: 3,5-diamino-1,2,4-triazole: potassium hydroxide is 2.1:1:0.05, and ethylene glycol is 50% of the total mass of the above reactants . Continue to heat up to 150°C, after 12 hours of reaction, wash with 1% sodium carbonate hot water solution to remove unreacted stearic acid and solvent ethylene glycol, and dry to obtain a yellow solid intermediate containing heterocyclic stearic acid amides a.

[0032]

[0033] Add 40mmol of intermediate A, 20mmol of 1,3-dichloroisopropanol, 1mmol of sodium carbonate, and 14g of ethanol solvent to another flask, wherein, intermediate A: 1,3-dichloroisopropanol: moles of sodium carbonate The ratio is 2:1:0.05, and ethanol is 50% of the total mass of the above reactants. After heating up and reflux reaction for 24h, the solvent is removed by distillation ...

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Abstract

The invention relates to a quaternary ammonium salt type surfactant containing symmetric heterocycle in the technical field of petroleum production engineering, and a synthesis method of the surfactant. According to the quaternary ammonium salt type surfactant containing symmetric heterocycle, long-chain fatty acid is used to react with 3,5-diamino-1,2,4-triazole to generate a yellow solid which is a fatty acid amido intermediate A containing heterocycle; and then the fatty acid amido intermediate A containing heterocycle is used to react with 1,3-dichloro isopropanol to generate the quaternary ammonium salt type surfactant containing symmetric heterocycle. The surfactant molecular structure contains triazole symmetric heterocycle and has corrosion inhibition; the surfactant molecular structure further contains quaternary ammonium salt dication and four hydrophobic chains to thicken acid liquor; and therefore, one surfactant has two functions at the same time, and the aim of reducing the cost of acid liquor for oil field acidification is finally achieved.

Description

technical field [0001] The invention relates to the technical field of oil recovery engineering, in particular to a quaternary ammonium salt type surfactant containing a symmetrical heterocycle and a synthesis method thereof. Background technique [0002] Since the 1990s, foreign countries have successfully used viscoelastic surfactants in fracturing fluids (referred to as VES fracturing fluids). Foreign oil companies first used VES fracturing fluid systems in fracturing and filling operations in the Gulf of Mexico in the United States. Later, it was widely used in many oil fields such as Canada, the United States, Italy, and the Gulf of Mexico. Its stimulation effect was better than that of conventional fracturing fluids, and it was quickly promoted, which opened extensive research on VES fracturing fluids. Cationic, anionic, and zwitterionic surface activities have been mainly studied at home and abroad. These VES fracturing fluid systems have the characteristics of no res...

Claims

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Application Information

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IPC IPC(8): C07D249/14C09K8/74
CPCC07D249/14C09K8/602C09K8/74C09K2208/30C09K2208/32
Inventor 虞建业卢敏晖袁萍袁玉峰
Owner CHINA PETROLEUM & CHEM CORP
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