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Double-hydrophilic-group double-ion amide surfactant and preparation method thereof

A technology of surfactant and double ion, which is applied in the field of surfactant preparation, can solve the problems of unable to control the acidity and alkalinity, achieve the effect of improving biodegradability, simple and effective synthesis method, and avoiding by-products

Active Publication Date: 2020-07-28
LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the currently used non-amide surfactants cannot regulate its acidity and alkalinity. If a buffer solution is used to mix a surfactant solution, the ionic strength of the buffer solution will affect the CMC of the surfactant, changing its performance. The surface tension between oils will also change accordingly. Therefore, the present invention has synthesized a double hydrophilic diionic amide surfactant containing carboxyl and amino groups, which can control its own acidity and alkalinity through amino groups and carboxyl groups. , reduce the surface tension between water and oil, and greatly increase oil recovery

Method used

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  • Double-hydrophilic-group double-ion amide surfactant and preparation method thereof
  • Double-hydrophilic-group double-ion amide surfactant and preparation method thereof
  • Double-hydrophilic-group double-ion amide surfactant and preparation method thereof

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Experimental program
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Effect test

Embodiment I-1

[0044] Amide surfactant preparation:

[0045] (1) Carboxylic acid amide surfactant I-1 containing carbon chain link

[0046]Preparation method: (1) Weigh 2.32g (20mmol) of 1,6-hexanediamine, add 20mL tetrahydrofuran, stir to dissolve it; weigh 1.09g (4mmol) of di-tert-butyl dicarbonate, and dissolve it with 5mL tetrahydrofuran; keep The system is in an ice-water bath, and the di-tert-butyl dicarbonate solution is slowly added to the 1,6-hexanediamine solution for more than 30 minutes; after the addition is completed, the system is milky white, and the reaction is milky white. Layer chromatography detection (dichloromethane:methanol=5:2, Rf=0.5), after the reaction was completed, THF was removed, 1,6-hexamethylenediamine was washed three times with water, the solvent was spin-dried to obtain a yellow oily liquid, and column chromatography Purification afforded 0.88 g of the product with a yield of 81.4%. (2) Take decylsuccinic anhydride 0.98g (4.1mmol), add 5mL dichloromethan...

Embodiment I-2

[0061] Amide surfactant preparation:

[0062] (1) Containing carboxylic acid amide surfactant I-2 of ether chain link

[0063] (1) Measure 5.84mL (40mmol) of 1,8-diamino-3,6-dioxa-octane in a 250mL round bottom flask, add 45mL tetrahydrofuran, put into a magnet and stir to dissolve it; weigh two Put 2.825g (10mmol) of di-tert-butyl carbonate in a 10mL eggplant-shaped bottle, add 5mL of tetrahydrofuran, and shake it ultrasonically to dissolve it; keep the reaction system in an ice bath, slowly add di-tert-butyl dicarbonate solution dropwise to 1 , 8-diamino-3,6-dioxa-octane solution, the dropping time is more than 30min; the dropping process, the system is milky white, after 24h of reaction, it is detected by thin layer chromatography (triethylamine: 1 drop; two Chloromethane:methanol=5:1, Rf=0.5), reaction is completed, spin-dry tetrahydrofuran, obtains white solid, adds appropriate amount of water, makes the solid dissolution in the system, transfers to separating funnel, ri...

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Abstract

The invention belongs to the field of preparation of surfactants, and particularly relates to a double-hydrophilic-group double-ion amide surfactant containing both carboxyl and amino groups and a preparation method of the double-hydrophilic-group double-ion amide surfactant. The general structural formula of the surfactant is described in the specification. R in the formula is -CH2-CH2- or -OCH2-CH2O-. The preparation method comprises the following steps: dissolving diamine into tetrahydrofuran, carrying out stirring, dissolving di-tert-butyl dicarbonate into tetrahydrofuran, adding a di-tert-butyl dicarbonate solution into a diamine solution, adding dichloromethane into a product obtained through column chromatography separation, carrying out dissolving, adding decyl succinic anhydride,carrying out stirring, adding hydrochloric acid into a product obtained through secondary column chromatography separation, and carrying out stirring. The acid-base property of the surfactant can be regulated and controlled by introducing the carboxyl and amino groups, the biodegradability of the surfactant is improved, and the surface tension of an oil-water interface can be reduced.

Description

technical field [0001] The invention belongs to the field of surfactant preparation, in particular to a double-hydrophilic diionic amide surfactant containing both carboxyl and amino groups and a preparation method thereof. Background technique [0002] The main functions of amide surfactants are thickening, corrosion inhibition, foam stabilization, emulsification, wetting and washing, etc. They are mainly used in cosmetics and detergent industries. In oilfield production, surfactants can be used as oil-in-water emulsifiers and water-in-oil emulsifiers for oilfield drilling fluids, as well as oil displacement agents for tertiary oil recovery. When the surfactant is used in water-in-oil emulsion drilling, it can effectively reduce the interfacial tension of oil and water, and make the water phase disperse in the base oil phase in the form of stable small droplets, forming a strong wellbore stability and reservoir protection effect Good, it can be used for drilling fluids wit...

Claims

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Application Information

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IPC IPC(8): B01F17/22C09K8/584C07C233/36C07C233/18C07C231/14C07C271/20C07C269/06C07C271/16C09K23/22
CPCC09K8/584C07C233/36C07C233/18C07C231/14C07C269/06C09K23/00C07C271/20C07C271/16
Inventor 于芳包欢何宇鹏李飞孙瑞霞韩宝秀
Owner LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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