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Gemini surfactant, and preparation method and applications thereof

A Gemini surface and active agent technology, applied in the direction of sulfonate preparation, chemical instruments and methods, drilling compositions, etc., can solve the problems of loss and foam discharge agent reduction, and achieve high liquid carrying rate and low surface tension , the effect of convenient operation

Active Publication Date: 2017-07-28
陕西毅德能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, general foaming agents can only greatly reduce the surface tension of the gas-liquid interface in deionized water, and have high foaming and liquid-carrying properties in the range of hydrophilic-lipophilic balance value of 9-15. The extreme use environment of salinity and high oil content reduces or loses these properties of the foaming agent

Method used

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  • Gemini surfactant, and preparation method and applications thereof
  • Gemini surfactant, and preparation method and applications thereof
  • Gemini surfactant, and preparation method and applications thereof

Examples

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preparation example Construction

[0025] The present invention provides a kind of gemini surfactant and its preparation method and application, a kind of preparation method of gemini surfactant, comprises the following steps successively:

[0026] (1) Preparation of fatty hydroxypropyl sulfobetaine: Mix 15-20 parts of 3-chloro-2-hydroxypropanesulfonate sodium and 100 parts of isopropanol aqueous solution into a three-necked flask, and heat to dissolve; then add 25-50 parts of aliphatic tertiary amine, react at a temperature of 70-90°C for 4-6 hours, and keep the pH value of the system at 9-10; after the reaction, first evaporate the solvent to dryness, add methanol to filter to remove inorganic salts, and distill the filtrate After the solvent is removed, the crude product is obtained, and the mixed solvent of ethyl acetate and acetone with a mass fraction ratio of 7:3 is used for repeated recrystallization several times, and the solid product obtained is fatty hydroxypropyl sulfobetaine; wherein isopropyl The...

Embodiment 1

[0043] The first step: in a reactor with a reflux condenser, mix 18.43 parts of 3-chloro-2-hydroxypropanesulfonate sodium and 100 parts of isopropanol aqueous solution (the ratio of isopropanol to water is 3:1) Added to the three-necked flask, and heated to dissolve. Then add 43.50 parts of oleic acid amidopropyl tertiary amine, control the temperature of 70° C., react for 4 hours, and keep the pH value of the system at 9. After the reaction, first evaporate the solvent to dryness, add methanol and filter to remove the inorganic salt, and distill the filtrate to remove the solvent to obtain the crude product. Then use the mixed solution of ethyl acetate and acetone with a mass fraction ratio of 7:3 to repeatedly recrystallize several times, and the solid product is oleic acid amide hydroxypropyl sulfobetaine.

[0044]Step 2: Add 109.95 parts of oleamide hydroxypropyl sulfobetaine and 70 parts of ethylene glycol dimethyl ether into the reaction bottle, mix well, add 8 parts of...

Embodiment 2

[0046] The first step: In a reactor with a reflux condenser, mix 19.66 parts of 3-chloro-2-hydroxypropanesulfonate sodium and 100 parts of isopropanol aqueous solution (the ratio of isopropanol to water is 3:1) Added to the three-necked flask, and heated to dissolve. Then add 47.12 parts of cocamidopropyl tertiary amine, control it at 80°C, react for 5h, and keep the pH value of the system at 9. After the reaction, first evaporate the water to dryness, add methanol and filter to remove the inorganic salt, and distill the filtrate to remove the solvent to obtain the crude product. Then use the mixed solution of ethyl acetate and acetone with a mass fraction ratio of 7:3 to repeatedly recrystallize several times, and the solid product is cocamide hydroxypropyl sulfobetaine.

[0047] The second step: add 115.19 parts of cocamide hydroxypropyl sulfobetaine and 80 parts of ethylene glycol monomethyl ether into the reaction bottle, mix well, add 12 parts of 50% KOH solution, and th...

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Abstract

The invention discloses a gemini surfactant, and a preparation method and applications thereof. In the prior art, the defoaming performance of conventional surfactants is reduced or lost in well drilling process because of high mineralization degree and high oil-containing extreme environment. Synthesis of the gemini surfactant possesses following steps: 15 to 20 parts of sodium 3-chloro-2-hydroxy propanesulfonate and 25 to 50 parts of an aliphatic tertiary amine are delivered into a three-mouth flask containing an isopropanol aqueous solution, an obtained mixture is heated to 70 to 90 DEG C for 4 to 6h of reaction so as to obtain a long-chain fatty hydroxypropyl sulfonated betaine; 80 to 120 parts of the long-chain fatty hydroxypropyl sulfonated betaine and 15 to 25 parts of dibromo alkane are delivered into a three-mouth flask, 70 to 100 parts of an organic solvent is added, uniform mixing is carried out, 8 to 12 parts of a base catalyst is added, 1.2 to 2.4 parts of a phase transfer catalyst is added, and reaction is carried out for 18 to 48h at 70 to 90 DEG C, so as to obtain the gemini surfactant. The preparation method is simple; performance is excellent; and the gemini surfactant possesses excellent effect as a foam scrubbing agent.

Description

technical field [0001] The invention relates to the field of surfactants, in particular to a gemini surfactant and its preparation method and application. Background technique [0002] With the development of economy and science and technology, especially the increasing requirements of human beings on the quality of life and living environment, natural gas, as a high-quality, clean fuel and raw material, has attracted people's attention, and accelerating the development of the natural gas industry has become a major issue in the world today. trend. Most of the gas fields that have been developed in my country are low-porosity and low-permeability weakly elastic water drive gas fields. As the development of gas reservoirs enters the middle and late stages, hydrocarbon condensate or formation water often flows into the bottom of the well. When the gas well production is high, the gas-liquid velocity at the bottom of the well is high, and the amount of fluid in the well is rel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C309/14C07C303/32C09K8/584
CPCC07C303/32C09K8/584C07C309/14
Inventor 赖小娟汪洁刘佩王磊
Owner 陕西毅德能源科技有限公司
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