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Gemini surfactant containing sulfo group and sulfate group anions

A sulfate-based, gemini-surface technology, applied in the preparation of sulfonates, drilling compositions, organic chemistry, etc., can solve the effect of low interfacial tension foaming and stabilizing, cannot meet the needs of practical engineering, and is difficult to achieve ultra-high Low interfacial tension and other problems, to achieve the effect of strong foaming ability, less by-products, and easy separation

Inactive Publication Date: 2014-03-12
YANGTZE UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still many deficiencies in the existing surfactants, which cannot meet the needs of practical engineering.
For example: the performance of some surfactants cannot meet the engineering requirements, it is difficult to achieve ultra-low interfacial tension, the performance of temperature resistance and salt resistance is low, it is easy to be adsorbed by the surface of clay, especially it cannot have low interfacial tension and good foaming and stabilizing effect at the same time

Method used

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  • Gemini surfactant containing sulfo group and sulfate group anions
  • Gemini surfactant containing sulfo group and sulfate group anions
  • Gemini surfactant containing sulfo group and sulfate group anions

Examples

Experimental program
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Effect test

Embodiment 1

[0038] 3-sulfonic acid-2-sulfate-maleic acid-di-n-octyl disodium (R:C 8 h 17 ) preparation

[0039] (1) Synthesis of maleic acid diester:

[0040] Add 5.64g of maleic anhydride (0.058mol), 16.50g of n-octanol (0.127mol) and toluene solvent (100mL) of concentrated sulfuric acid (5mL) into a 500mL three-necked flask equipped with a stirrer and a reflux condenser, at 130°C After the reaction stopped, wait for the temperature to cool to room temperature, add dropwise saturated sodium bicarbonate solution to the flask to neutralize the excess concentrated sulfuric acid, and adjust its pH=7; wash with saturated NaCl solution, separate the organic phase, and use The solid was dried over sodium sulfate and filtered, and the solvent in the filtrate was evaporated to dryness to obtain 17.21 g of a white solid, with a yield of 87.1%.

[0041] (2) Synthesis of epoxy succinic acid diester:

[0042] Add 17.21g of the product obtained in step (1) (0.051mol), 30% hydrogen peroxide solutio...

Embodiment 2

[0048] 3-sulfonic acid-2-sulfate-maleic acid-di-n-decyl disodium (R:C 10 h 21 ) preparation

[0049] (1) Synthesis of maleic acid diester:

[0050] Add 8.57g maleic anhydride (0.087mol), 30.15g n-decyl alcohol (0.19mol) and concentrated sulfuric acid (6mL) in toluene solvent (150mL) into a 500mL three-necked flask equipped with a stirrer and reflux condenser, at 130°C After the reaction stopped, wait for the temperature to cool to room temperature, add dropwise saturated sodium bicarbonate solution to the flask to neutralize the excess concentrated sulfuric acid, and adjust its pH=7; wash with saturated NaCl solution, separate the organic phase, and use The solid was dried over sodium sulfate and filtered, and the solvent in the filtrate was evaporated to dryness to obtain 30.78 g of a white solid, with a yield of 89.2%.

[0051] (2) Synthesis of epoxy succinic acid diester:

[0052] Add 22.34g of the product obtained in step (1) (0.056mol), 30% hydrogen peroxide solution ...

Embodiment 3

[0058] 3-sulfonic acid-2-sulfate-maleic acid-di-n-lauryl disodium (R:C 12 h 25 ) preparation

[0059] (1) Synthesis of maleic acid diester:

[0060] Add 5.64g of maleic anhydride (0.058mol), 23.77g of n-lauryl alcohol (0.128mol) and toluene solvent (100mL) of concentrated sulfuric acid (5mL) into a 500mL three-neck flask equipped with a stirrer and a reflux condenser. After the reaction stopped, wait for the temperature to cool to room temperature, add dropwise saturated sodium bicarbonate solution to the flask to neutralize the excess concentrated sulfuric acid, and adjust its pH=7; wash with saturated NaCl solution, separate the organic phase, and use The solid was dried over sodium sulfate and filtered, and the solvent in the filtrate was evaporated to dryness to obtain 23.01 g of a white solid, with a yield of 87.6%.

[0061] (2) Synthesis of epoxy succinic acid diester:

[0062] Add 23.01g of the product obtained in step (1) (0.051mol), 30% hydrogen peroxide solution ...

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Abstract

The invention relates to a gemini surfactant containing sulfo group and sulfate group anions, belonging to the field of design of oilfield chemical agents. The gemini surfactant is characterized by having the structural formula shown in the specification, wherein n is 8, 10, 12, 14 and 16. A preparation method of the gemini surfactant provided by the invention comprises the following steps: (1) open-loop esterification reaction between maleic anhydride and fatty alcohol; (2) double-bond oxidation reaction of maleate diether; (3) substitution reaction of epoxy succinate diether; (4) esterification reaction of succinate diether sodium sulfonate. The gemini surfactant containing sulfo group and sulfate group anions, provided by the invention, contains the anion structures of sulfate group and sulfo group, has relatively high surface activity and strong foaming ability, and has the characteristics of simple synthesis method, mild reaction conditions, simplicity in operation, easiness in separation and high yield.

Description

Technical field: [0001] The invention relates to a gemini surfactant containing sulfonic acid groups and sulfate ester group anions, which belongs to the technical field of oil field chemical agent design. Background technique: [0002] Compared with traditional surfactants (containing 1 hydrophilic group and 1 hydrophobic group), gemini surfactants usually contain 2 hydrophilic groups and 2 hydrophobic groups, and gemini surfactants have more Good surface activity. Gemini surfactants have the following advantages: (1) lower critical micelle concentration (CMC) (evaluating the tendency to form micelles); (2) lower C 20 (evaluation of interfacial adsorption); (3) more compact hydrophobic groups; (4) stronger interchange interaction with oppositely charged surfactants at the water / air interface. They are more water soluble and some gemini surfactants have unique rheological properties. Classification according to the electronegativity of surfactants: there are cationic, ani...

Claims

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Application Information

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IPC IPC(8): B01F17/10C07C309/58C07C303/32C09K8/584C09K23/10
Inventor 唐善法田磊欧阳向南向晶杨珍
Owner YANGTZE UNIVERSITY
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