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Preparation method of alkanolamide polyoxyethylene ether and application thereof

A technology of polyoxyethylene ether and alkanolamide, which is applied in the preparation of carboxylic acid amide, preparation of organic compounds, chemical instruments and methods, etc., can solve the problem of increasing the difficulty and additional cost of oil recovery, affecting the normal production of oil wells, and corrosion of equipment and pipelines and other problems, to achieve the effect of excellent salt resistance, excellent interfacial tension and low cost

Active Publication Date: 2011-01-26
孙安顺
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing conventional ASP flooding system uses an alkali concentration of 1.0-1.5%, but some problems that directly restrict the industrial application of this technology have been exposed from field tests: Scale has seriously damaged the formation, and the pump barrel must be cleaned every 10 to 15 days, which increases the difficulty of oil production and additional costs, and even directly affects the normal production of oil wells; and strong alkali (such as NaOH) will cause serious corrosion of equipment and pipelines; It will also reduce the viscosity and viscoelasticity of the polymer. In order to achieve the required viscosity, the concentration of the polymer must be greatly increased, which will increase the cost a lot.

Method used

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  • Preparation method of alkanolamide polyoxyethylene ether and application thereof
  • Preparation method of alkanolamide polyoxyethylene ether and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Put 368 kg of stearic acid into the pressure reactor, stir and heat up until the fatty acid is completely melted, then add 61 kg of monoethanolamine into the reactor, and then add 2.5 kg of KOH catalyst. Nitrogen gas was introduced, vacuum was pumped, and this was repeated three times. The pressure in the reactor was controlled at 0.02M Pa, the temperature was controlled at 120-170°C, and the reaction was carried out for 6 hours. Then pass in nitrogen to control the temperature at 160°C, then pass in 220 kg of ethylene oxide at an absolute pressure of 0.3 to 0.4 MPa; keep warm at 180°C for 60 minutes; pass in nitrogen, cool down to 75°C, and the discharge will be added product.

Embodiment 2

[0020] Put 368 kg of stearic acid into the pressure reactor, stir and heat up until the fatty acid is completely melted, then add 95 kg of diethanolamine into the reactor, and then add 5 kg of KOH catalyst. Nitrogen gas was introduced, vacuum was pumped, and this was repeated three times. The pressure in the reactor was controlled at 0.02M Pa, the temperature was controlled at 120-170°C, and the reaction was carried out for 12 hours. Then feed nitrogen to control the temperature at 160°C, and at an absolute pressure of 0.3 to 0.4 MPa; feed 440 kg of ethylene oxide; at 180°C, keep warm for 60 minutes; feed nitrogen, cool down to 75°C, and discharge; into products.

Embodiment 3

[0022] Put 340 kg of palmitic acid into the pressure reactor, stir and heat up until the fatty acid is completely melted, then add 95 kg of diethanolamine into the reactor, and then add 3.5 kg of KOH catalyst. Nitrogen gas was introduced, vacuum was pumped, and this was repeated three times. The pressure in the reactor was controlled at 0.02M Pa, the temperature was controlled at 120-170°C, and the reaction was carried out for 8 hours. Then feed nitrogen to control the temperature at 160°C, at an absolute pressure of 0.3-0.4MPa; feed 410 kg of ethylene oxide; at 180°C, keep warm for 60 minutes; feed nitrogen, cool down to 75°C, and discharge; into products.

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Abstract

The invention discloses a preparation method of alkanolamide polyoxyethylene ether and application thereof. The method comprises the following steps of: putting 200 to 400 parts of fatty acid into a pressure reactor; raising the temperature under stirring till the fatty acid is fully melted; adding 50 to 110 parts of ethanolamine into the reactor; adding 2 to 6 parts of potassium hydroxide (KOH) catalyst; introducing nitrogen; vacuumzing for three times, wherein the pressure in the reactor is controlled to be 0.02MPa and the temperature is controlled to be between 120 and 170 DEG C; reacting for 5 to 12 hours; introducing the nitrogen and controlling the temperature to be 160 DEG C; introducing 200 to 500 parts of ethylene oxide at the absolute pressure of 0.3 to 0.4MPa; keeping the temperature of 180 DEG C for 60 minutes, introducing the nitrogen; reducing the temperature to be 75 DEG C; and discharging to obtain an addition product. The alkanolamide polyoxyethylene ether prepared by the method can form an ultralow interfacial tension of 10<-3> to 10<-4>mN / m together with crude oil.

Description

Technical field: [0001] The invention relates to a preparation method of alkanolamide polyoxyethylene ether and its application in tertiary oil recovery. Background technique: [0002] After primary and secondary extraction of underground crude oil, most of the crude oil remains in the formation. The tertiary oil recovery technology is a technology that uses chemical agents to enhance oil recovery. Compound flooding refers to two or three of alkali-surfactant-polymer. The combined oil displacement technology, the polymer increases the viscosity of the displacement fluid, improves the oil / water mobility ratio and water absorption profile, its viscoelasticity also has a certain oil washing effect, and the surfactant reduces the oil / water interfacial tension, emulsifying And solubilize crude oil; alkali reacts with acidic substances in crude oil to generate new surfactants in situ, which has a synergistic effect with external surfactants to minimize oil / water interfacial tensio...

Claims

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Application Information

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IPC IPC(8): C08G65/26C07C233/18C07C231/12C09K8/588C09K8/584
Inventor 孙安顺
Owner 孙安顺
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