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Self-stabilized carbon dioxide/ammonia water switch foam system

A foam system, carbon dioxide technology, applied in chemical instruments and methods, drilling compositions, etc., can solve the problems of poor temperature resistance of foam, poor foam stability, insensitive switch, etc., and achieve simplified operation and good foaming. stability and foam stability, and the effect of a wide range of working environments

Active Publication Date: 2017-08-04
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the foam stability is very poor (40 ℃, half-life t 1 / 2 is 12min), it is very easy to burst, and hydroxyethyl cellulose foam stabilizer needs to be added to improve foam stability (40°C, t 1 / 2 67min)
Moreover, the foam has poor temperature resistance (120°C, t 1 / 2 4min), it is necessary to add clay particles (0.3%) with strong temperature resistance as a foam stabilizer to improve the foam stability (t 1 / 2 87min)
At the same time, the foam system CO 2 / N 2 The switch is not sensitive, use 100ml / minCO 2 Foaming takes 13s, while defoaming takes 50ml / minN 2 But it takes more than 500s

Method used

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  • Self-stabilized carbon dioxide/ammonia water switch foam system
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  • Self-stabilized carbon dioxide/ammonia water switch foam system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] This embodiment tests the CO of the foaming agent erucamide propyl-N,N-dimethyl tertiary amine 2 Response behavior and its foaming and foam stabilizing properties.

[0033] The composition of the foaming liquid is as follows:

[0034]

[0035]

[0036] experimental method:

[0037] (1) Weigh 5g of erucamidopropyl-N,N-dimethyl tertiary amine and mix it with 95g of deionized water, heat and stir in a water bath at 90°C, and inject 1L / min of CO into the mixture 2 , until a uniformly dispersed milky white dispersion is obtained. Weigh 10g of the dispersion and dilute it to a concentration of 0.5%, and feed CO at 0.4L / min 2 Pretreatment for 3 minutes to obtain CO 2 Pretreatment liquid, another 10g of dispersion liquid was weighed and diluted to 0.5% concentration, and N was passed through at 0.4L / min 2 Pretreatment for 3min to get N 2 Pretreatment solution.

[0038] (2) Measure 20ml of CO respectively 2 Pretreatment solution, N 2 Use Anton Paar MCR302 rheometer ...

Embodiment 2

[0044] In this example, the foaming agent erucamide propyl-N,N-dimethyl tertiary amine and CO 2 On-off properties of the foam formed by the reaction.

[0045] The composition of the foaming liquid is as follows:

[0046]

[0047] experimental method:

[0048] (1) Weigh 5g of erucamidopropyl-N,N-dimethyl tertiary amine and mix it with 95g of deionized water, heat and stir in a water bath at 90°C, and inject 1L / min of CO into the mixture 2 , until a uniformly dispersed milky white dispersion is obtained. Weigh 10g of the dispersion and dilute to a mass concentration of 0.5%, then measure 100ml and inject it into the kettle of the high-temperature and high-pressure foam generator. Set the temperature of the instrument to 80°C, preheat at 80°C for 30 minutes, and then pass CO into the kettle 2 Until the pressure balance is 3MPa, then start the test, foam for 3min under high-speed stirring (1020r / min), record the maximum foaming volume V max and the foam half-life t 1 / 2 , ...

Embodiment 3

[0056] In this example, the effect of the concentration of the foaming agent erucamide propyl-N,N-dimethyl tertiary amine on the foam performance (foaming performance and foam stabilizing performance) was tested.

[0057] The composition of the foaming liquid is as follows:

[0058]

[0059] experimental method:

[0060] (1) Weigh 5g of erucamidopropyl-N,N-dimethyl tertiary amine and mix it with 95g of deionized water, heat and stir in a water bath at 90°C, and inject 1L / min of CO into the mixture 2 , until a uniformly dispersed milky white dispersion is obtained. A certain amount of dispersion liquid was weighed and diluted to 0.10%, 0.15%, 0.25%, 0.35% and 0.50% of the mass concentration of erucamide propyl-N,N-dimethyl tertiary amine (UC22AMPM). Take 100mL of the dispersion liquid of each concentration and pass through CO at 0.4L / min 2 Pretreatment for 3 minutes to form a pretreatment solution.

[0061] (2) Measure 20mL of pretreatment solution of each concentration ...

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PUM

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Abstract

The invention relates to a self-stabilized carbon dioxide / ammonia water switch foam system which is composed of CO2, a bubbling liquid and ammonia water. The CO2 is stimulating factors and bubbling gas, the ammonia water is a defoaming liquid, the bubbling liquid is prepared from a bubbling agent and deionized water, the bubbling agent accounts for 0.1-1% by mass of the bubbling liquid, and the bubbling agent is erucyl amide propyl-N,N-dimethyl tertiary amine or oleic amide propyl-N,N-dimethyl tertiary amine. The foam system is simple in component and sensitive in foam switching property, and still has relatively good foaming property and switching property in a high-temperature and high-pressure environment.

Description

technical field [0001] The invention belongs to the technical field of smart switch foam, in particular to a CO 2 On-off foam system. Background technique [0002] Due to its small particle size, large specific surface area and good fluidity, foam is widely used in food processing, ultrasound imaging, medical delivery, mineral separation, porous material preparation, and oil and gas exploitation. In these applications, different stages require different foam stability. For example, in washing, material recovery or crude oil extraction, foam stabilization is required up front, followed by defoaming in subsequent stages to minimize the amount of foam for easy handling. At present, the stability of foam is often improved by adding foam stabilizers such as surfactants, polymers, proteins, nanoparticles, etc., while defoaming mainly includes mineral oil, silicone, and polyether defoamers. However, these foaming and defoaming methods not only cannot effectively adjust the perfo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/584C09K8/60C09K8/94C09K8/504C09K8/518C09K8/70C09K8/74
Inventor 冯玉军梁梅清
Owner SICHUAN UNIV
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