Novel kation gemini surfactant and process for synthesizing the same

A gemini surface and cationic technology, applied in chemical instruments and methods, dissolution, chemical/physical processes, etc., can solve the problems of limited varieties of gemini surfactants, difficulty in realizing industrial production, and low yield in the preparation process, and achieve low price , good stability and excellent surface activity

Inactive Publication Date: 2008-10-08
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, the price of gemini surfactants produced abroad is expensive, and the varieties of gemini surfactants developed in China are limited.
At present, the factors that restrict the large-scale application o

Method used

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  • Novel kation gemini surfactant and process for synthesizing the same
  • Novel kation gemini surfactant and process for synthesizing the same
  • Novel kation gemini surfactant and process for synthesizing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1 Urethane reaction

[0028] At room temperature (25°C), in a 250ml three-necked round-bottomed flask, add 17.5ml of solvent acetone, dropwise add 5ml of N,N-dimethylethanolamine, mix well, and slowly add an appropriate amount of 2,4-toluene diisocyanate ( TDI) 3.55ml (the molar weight is half of that of alkanolamine). After sealing, let it stand, and react at room temperature for 6 hours. The product is a light yellow liquid with a slight viscosity.

Embodiment 2

[0029] The synthesis of embodiment 2 BG07

[0030] Take the synthesis of BG07-14 as an example. Put the above-mentioned round-bottomed flask into a water bath, and add 12.5 ml of n-tetradecyl bromide (the same molar amount as dimethylethanolamine) dropwise under stirring conditions. Seal and stir, keep the temperature at 45°C, and react for 12 hours to obtain a high-viscosity yellow-brown liquid. Dry at 80°C to obtain a yellow solid, which is BG07-14, weighing 21.4158-22.0544g (yield: 95-98%).

Embodiment 3

[0031] The surface activity measurement of embodiment 3 BG07 series surfactants

[0032] Taking the surface activity determination of BG07-14 as an example, image 3 . The critical surface tension of BG07-14 (γ cmc ) is 21.9mN·m -1 , with a critical micelle concentration of 1.0×10 -5 mol L -1 . With common surfactants (such as dodecyltrimethylammonium bromide cmc is 1.6×10 -2 mol L -1 , gamma cmc 40mN·m -1 ) compared to its surface activity is greatly improved.

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Abstract

The invention relates to a novel cationic gemini surfactant used for the petroleum industry and a composition method thereof, which is provided in order to satisfy the requirements of the cationic gemini surfactant, proposed by different application conditions. The technical scheme is as follows: the cationic gemini surfactant is toluene-2, 4-diamino acid-N-dimethyl alkyl amidocyanogen ethyl ester; a drying reactor is firstly added with proper amount of acetone as a solvent, then is added with N, N-deanol and is dripped with 2, 4-TDI of a mol ratio of 2:1, all of which are stirred well and sealed for a rest at the room temperature and for a reaction for 6 hours; the solution is added with bromoalkane of the same molar weight as the 2, 4-TDI and is stirred, sealed and kept at a constant temperature of 45 DEG C for a water bath reaction for 12 hours; at last a solid product is acquired by drying at 80 DEG C. The surfactant has higher surface activity, excellent concertedness, simple composition method, mild reaction condition, high productive rate and good stability; besides, the surfactant can be used for producing household chemicals and for tertiary oil recovery.

Description

technical field [0001] The invention relates to a novel cationic gemini surfactant used for tertiary oil recovery in the petroleum industry and production of high-efficiency detergents, solubilizers, emulsifiers and other daily-use chemicals and a synthesis method thereof. Background technique [0002] Gemini (gemini) surfactant is formed by chemical bonding of two common single-chain single-head group surfactants at the ionic head group. This structure makes it easier to generate a strong van der Waals force between carbon chains, and the distance between the ion headgroups is reduced because of the covalent bond connection structure, which realizes a close arrangement on the gas-liquid interface of the solution, thus having a more High surface activity. [0003] The U.S. Patent US2,524,218 [Frederick C B, Verona NJ. Washing Composition.US: 2524218, (1950)] applied in 1946, Frederick C Bersworth etc. are to develop a kind of detergent builder that mainly plays the role of ...

Claims

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Application Information

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IPC IPC(8): B01F17/00C09K23/00
Inventor 胡星琪王东增王梓民黄俊莉
Owner SOUTHWEST PETROLEUM UNIV
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