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A kind of ester group-containing cationic gemini surfactant and its preparation method and application

A Gemini surface, cation technology, applied in the preparation of organic compounds, cyanide reaction preparation, chemical instruments and methods, etc., can solve the problems of complex process, unfriendly product environment, harsh synthesis conditions, etc., and achieve high yield and purity. , excellent temperature resistance and stability, the effect of mild synthesis conditions

Active Publication Date: 2019-03-19
成都菲尔特技术开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the above-mentioned deficiencies of complex process, harsh synthesis conditions and unfriendly products in the existing cationic gemini surfactant preparation technology, and provide a cationic gemini surfactant containing ester groups

Method used

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  • A kind of ester group-containing cationic gemini surfactant and its preparation method and application
  • A kind of ester group-containing cationic gemini surfactant and its preparation method and application
  • A kind of ester group-containing cationic gemini surfactant and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Dissolve n-dodecyl methacrylate and dimethylamine in water, and react at 20°C for 24 hours to obtain a mixed solution 1I, the molar ratio of n-dodecyl methacrylate to dimethylamine is 1:1.5; use Evaporate and dry the mixed solution 1I with a rotary evaporator under low pressure to obtain the intermediate tertiary amine 1II; dissolve the obtained intermediate tertiary amine 1II and 1,2-dibromoethane in acetone, and react at 20°C for 24 hours , to obtain the mixed solution 1III, the molar ratio of the intermediate tertiary amine 1II to 1,2-dibromoethane is 2:1; the mixed solution 1III is freeze-crystallized to obtain the surfactant 1IV.

[0038] The surfactant 1IV is a compound having the structure shown in formula 1A,

[0039]

[0040] Dissolving 3% of surfactant 1Ⅳ and 1% of potassium chloride in water to obtain viscoelastic surfactant cleaning fracturing fluid, the temperature resistance can reach 67°C. The test method of the temperature resistance performance is d...

Embodiment 2

[0042] Dissolve n-hexadecyl methacrylate and dimethylamine in water, and react at 50°C for 12 hours to obtain a mixed solution 2I, the molar ratio of n-hexadecyl methacrylate and dimethylamine is 1:2; use Evaporate and dry the mixed liquid 2I under low pressure with a rotary evaporator to obtain the intermediate tertiary amine 2II; dissolve the obtained intermediate tertiary amine 2II and 1,2-dibromoethane in acetone, and react at 60°C for 12 hours , the mixed solution 2III was obtained, and the molar ratio of the intermediate tertiary amine 2II to 1,2-dibromoethane was 2.5:1; the mixed solution 21II was frozen and recrystallized to obtain the surfactant 2IV.

[0043] The surfactant 2IV is a compound having the structure shown in formula 2A,

[0044]

[0045] Dissolve 3% of surfactant 2Ⅳ and 2% of sodium salicylate in water to obtain a viscoelastic surfactant cleaning fracturing fluid with a temperature resistance of 97°C. The test method of the temperature resistance perf...

Embodiment 3

[0047] Dissolve n-octadecyl methacrylate and dimethylamine in water, and react at 80°C for 8 hours to obtain a mixed solution 3I. The molar ratio of n-octadecyl methacrylate to dimethylamine is 1:4; The evaporator evaporates and dries the mixed solution 3I under low pressure to obtain the intermediate tertiary amine 3II; dissolve the obtained intermediate tertiary amine 3II and 1,2-dibromoethane in acetone, and react at 80°C for 8 hours, The mixed solution 3III was obtained, and the molar ratio of the intermediate tertiary amine 3II to 1,2-dibromoethane was 4:1; the mixed solution 3III was freeze-crystallized to obtain the surfactant 3IV.

[0048]The surfactant 3IV is a compound having the structure shown in formula 3A,

[0049]

[0050] Dissolve 5% of surfactant 3Ⅳ and 4% of sodium salicylate in water to obtain viscoelastic surfactant cleaning fracturing fluid with a temperature resistance up to 120°C. The test method of the temperature resistance performance is described...

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Abstract

The invention discloses a cationic gemini surfactant containing an ester group, belonging to the field of surfactants, which is a compound having the structure shown in formula A: wherein R represents C 8 ~C 20 of hydrocarbon groups. The invention also provides a preparation method of the surfactant, which is prepared by using long-chain bromoalkane, dimethylamine and alkyl methacrylate as raw materials through addition reaction and quaternary ammonium salt reaction. The surfactant molecule contains an ester group, which makes it naturally degradable and environmentally friendly. At the same time, the raw materials involved in the preparation method of the surfactant are easy to obtain, the cost is low, the synthesis method is simple, the synthesis conditions are mild, and the yield and purity of the obtained product are relatively high. The surfactant is applied to the field of fracturing fluid, and the prepared viscoelastic surfactant fracturing fluid has excellent temperature resistance and stability.

Description

technical field [0001] The invention relates to a gemini surfactant and a preparation method thereof. More specifically, the present invention relates to an ester group-containing cationic gemini surfactant and its preparation method and application. Background technique [0002] Water-based fracturing fluids can be roughly divided into: natural vegetable gum fracturing fluids, cellulose fracturing fluids and synthetic polymer fracturing fluids. The above-mentioned fracturing fluid systems have been widely used in various oilfields at home and abroad, and have achieved good production stimulation effects. However, there are common defects in the use of these fracturing fluid systems, that is, after the fracturing fluid breaks, the residue will remain in the fracture, and the polymer remaining in the fracture will seriously reduce the permeability of the proppant packing layer, thereby damaging the production layer, resulting in Fracturing becomes less effective. [0003] ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01F17/18B01F17/28C07C227/18C07C229/16C09K23/18C09K23/28
CPCC07C227/08C07C227/18C09K23/00
Inventor 鲁红升郑存川黄志宇张宁康
Owner 成都菲尔特技术开发有限公司