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Low surface tension viscosity-increasing carboxylate gemini surfactant and preparation method thereof

A low surface tension, surfactant technology, applied in the preparation of the gemini surfactant, in the field of low surface tension viscosity-enhancing carboxylate gemini surfactant, can solve the problem of not considering surface/interface activity and cumbersome operation , low surface tension and other problems, to achieve the effects of excellent viscosity, simple synthesis method and process, and low surface tension

Active Publication Date: 2021-10-29
YANGTZE UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] CN101664657A discloses benzene-1,4 (N-β-sodium acrylate-N-alkylamine) carboxylate gemini surfactant and preparation method thereof, and its critical micelle concentration cmc is 3.8×10 -4 mol / L, corresponding to surface tension γ cmc It is 31.8mN / m, but it needs to pass through argon, nitrogen to protect and isolate oxygen during synthesis, and the operation is cumbersome
However, neither its surface / interface activity nor low surface tension was considered

Method used

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  • Low surface tension viscosity-increasing carboxylate gemini surfactant and preparation method thereof
  • Low surface tension viscosity-increasing carboxylate gemini surfactant and preparation method thereof
  • Low surface tension viscosity-increasing carboxylate gemini surfactant and preparation method thereof

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preparation example Construction

[0035] The present invention also provides a kind of preparation method of low surface tension viscosifying carboxylate gemini surfactant, comprises the following steps:

[0036] (2) Synthesis of Propylenediamine Sodium Diacetate:

[0037] Add a solution made of 1,3-propylenediamine and sodium chloroacetate with a molar ratio of 1:2 to 1:3 into the reactor, the reaction temperature is 80°C to 100°C, and the reaction time is 10 to 12h; then use The sodium hydroxide solution with a mass fraction of 50% adjusts the pH to 8-10, and continues the heat preservation reaction for 1-3 hours; after the reaction is completed, the solvent is evaporated and removed, and then washed and filtered with absolute ethanol or acetone; the filtered product is dried to obtain propylenediamine di Sodium acetate solid; the chemical reaction formula is:

[0038] h 2 N-(CH 2 ) 3 -NH 2 +2ClCH 2 COONa-→NaOOCH 2 C-HN-CH 2 CH 2 CH 2 -NH-CH 2 COONa(1);

[0039] (3) N, the synthesis of N'-two (3-...

Embodiment 1

[0047] Preparation of DC03-14:

[0048] (1) Synthesis of Propylenediamine Sodium Diacetate:

[0049] Add 0.025mol of 1,3-propylenediamine, 0.056mol of sodium chloroacetate and 50mL of distilled water into a three-port reactor equipped with a stirrer and a reflux condenser, heat up until the reactants are dissolved, and react at a temperature of 80~100°C for 10~ 12h; then add 10mL sodium hydroxide solution with a mass fraction of 50% to adjust the pH to 8-10, and continue to keep warm for 1-2h; the reaction is completed and the solvent is evaporated, then washed and filtered with absolute ethanol or acetone; the filtered product is dried Sodium propylenediaminediacetate was dried to obtain a solid with a yield of about 67%.

[0050] (2) N, the synthesis of N'-two (3-chloro-2-hydroxyl propane) propanediamine sodium diacetate:

[0051] Add 0.025 mol of sodium propylenediamine diacetate and 35 mL of distilled water obtained in step (1) into a three-port reactor equipped with an ...

Embodiment 2

[0055] Preparation of DC03-16:

[0056] (1) Synthesis of Propylenediamine Sodium Diacetate:

[0057] Add 0.037mol of 1,3-propylenediamine, 0.084mol of sodium chloroacetate and 50mL of distilled water into a three-port reactor equipped with a stirrer and a reflux condenser, raise the temperature until the reactants are dissolved, and react at a temperature of 80-100°C for 12 hours Then add 14mL of sodium hydroxide solution with a mass fraction of 50% to adjust the pH value to 8-10, and continue to incubate for 1-3h; evaporate and remove the solvent after the reaction is completed, then wash and filter with absolute ethanol or acetone; dry the filtered product Dry to obtain sodium propylenediaminediacetate as a white solid with a yield of about 71%.

[0058] (2) N, the synthesis of N'-two (3-chloro-2-hydroxyl propane) propanediamine sodium diacetate:

[0059] Add 0.032 mol of sodium propylenediamine diacetate and 34 mL of distilled water obtained in step (1) into a three-port ...

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Abstract

The invention belongs to the technical field of oilfield chemical agent design, in particular to a low surface tension viscosity-increasing carboxylate gemini surfactant and a preparation method. A low surface tension viscosity-increasing carboxylate gemini surfactant, the structural formula is: in the formula: n=14, 16, 18. A preparation method of a low surface tension viscosity-increasing carboxylate gemini surfactant, comprising the steps of: (1) synthesis of propylenediamine sodium diacetate; (2) N, N'-bis(3-chloro-2 Synthesis of ‑hydroxypropane) propanediamine sodium diacetate; (3) Synthesis of low surface tension viscosity-increasing carboxylate gemini surfactant. The invention enriches the types of gemini surfactants and fills the gap in the field of low surface tension viscosity-increasing carboxylate gemini surfactants. At the same time, the raw materials are easy to obtain, the preparation method is simple and easy to operate, the reaction conditions are mild, and no catalysts and products are added. Easy to separate and purify.

Description

technical field [0001] The invention relates to a low surface tension viscosity-increasing carboxylate gemini surfactant, and also relates to a preparation method of the gemini surfactant, which belongs to the field of oil field chemical agent design. Background technique [0002] As we all know, Gemini (gemini) surfactants are formed by chemically bonding two conventional surfactants near the hydrophilic head group by a linking group. This unique structure endows gemini surfactants with many performance characteristics superior to traditional surfactants: high surface / interface activity, low critical micelle concentration, good water solubility and good electrolyte resistance, etc. The field has good application prospects. [0003] However, the raw materials required for the synthesis of cationic gemini surfactants are scarce and costly, and can easily cause wettability reversal damage to reservoir seepage channels; nonionic gemini surfactants are expensive, have cloud poi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/584C07C227/16C07C229/16
CPCC07C227/08C07C227/16C07C227/18C09K8/584C07C229/16
Inventor 唐善法金礼俊穆萨郑雅慧胡睿智
Owner YANGTZE UNIVERSITY
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