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Method for preparing demulsifying agent for condensed oil-water emulsion

A technology for water emulsion and condensate oil, applied in the direction of chemical dehydration/demulsification, etc., can solve the problems of wasting energy, affecting the productivity of gas wells, sewage environmental protection and safety substandard, etc., to reduce pollution and reduce the oil content of sewage. Effect

Active Publication Date: 2018-06-15
SHANDONG DESHI CHEM IND CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The gas field site often discards it or treats it as sewage. The environmental protection and safety of the sewage are not up to standard. During the development and design, the preparation of condensate oil demulsifier has become the key direction of everyone's research

Method used

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  • Method for preparing demulsifying agent for condensed oil-water emulsion
  • Method for preparing demulsifying agent for condensed oil-water emulsion
  • Method for preparing demulsifying agent for condensed oil-water emulsion

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preparation example Construction

[0029] A preparation method for condensate oil-water emulsion demulsifier, the preparation steps are:

[0030] (1) Add phenol into the reaction kettle, heat up to 90°C, stir for 30 minutes after the product melts, add dodecylbenzenesulfonic acid, add 1500# solvent oil, and stir for 10 minutes. Lower the temperature to 80°C, and add formaldehyde dropwise at 75°C to 80°C. After the dropwise addition, keep the reaction at this temperature for 1 hour. Then heat up and reflux to divide the water, and the temperature is controlled between 125-155°C until no more water is precipitated;

[0031] (2) Cool down the temperature of the product obtained in step ⑴ to 58-60°C, add 10%-20% potassium methoxide solution (mass percentage of potassium methoxide in methanol) from the upper part of the reactor dropwise, stir evenly, and evacuate to the reactor The internal pressure reaches -0.08MPa, the vacuum time is ≥ 30 minutes, until the moisture is controlled below 0.05% (mass percentage), st...

Embodiment 1

[0050] (1) Add 200kg of phenol into the reaction kettle, raise the temperature to 90°C, stir for 30 minutes after the product melts, add 2kg of dodecylbenzenesulfonic acid, add 50kg of 1500# solvent oil, and stir for 10 minutes. Lower the temperature to 80°C, and add 66kg of formaldehyde dropwise at 75°C to 80°C. After the dropwise addition, keep the reaction at this temperature for 1 hour. Then raise the temperature and reflux to divide the water, and the temperature is controlled between 125-155°C until no more water is precipitated; the phenolic resin is obtained.

[0051](2) Cool down the phenolic resin to 90°C, vacuumize until the pressure in the reactor reaches -0.08MPa, the vacuum time should not be less than 30 minutes, and then check the moisture until the moisture is controlled below 0.05%, then stop the vacuum.

[0052] (3) Cool down to 58-60°C, add 160 kg of 10% potassium methoxide solution from the drip tank on the upper part of the reaction kettle, of which 10% p...

Embodiment 2

[0057] (1) Add 200kg of phenol into the reaction kettle, raise the temperature to 90°C, stir for 30 minutes after the product melts, add 2kg of dodecylbenzenesulfonic acid, add 66kg of 1500# solvent oil, and stir for 10 minutes. Lower the temperature to 80°C, and add 58kg of formaldehyde dropwise at 75°C to 80°C. After the dropwise addition, keep the reaction at this temperature for 1 hour. Then raise the temperature and reflux to divide the water, and the temperature is controlled between 125-155°C until no more water is precipitated; the phenolic resin is obtained.

[0058] (2) Cool down the phenolic resin to 90°C, vacuumize until the pressure in the reactor reaches -0.08MPa, the vacuum time should not be less than 30 minutes, and then check the moisture until the moisture is controlled below 0.05%, then stop the vacuum.

[0059] (3) Cool down to 58-60°C, add 200kg of 10% potassium methoxide solution from the drip tank on the upper part of the reaction kettle, wherein the 10...

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Abstract

The invention provides a method for preparing a demulsifying agent for a condensed oil-water emulsion. The method comprises the steps: heating up phenol to melt the phenol, then, carrying out stirring, adding dodecylbenzene sulfonic acid and solvent oil 1500#, carrying out uniform stirring, carrying out cooling, dripping formaldehyde, and then, carrying out heated refluxing water separation; carrying out cooling, then, adding a potassium methoxide solution, carrying out stirring, vacuumizing a reactor, and charging the reactor with nitrogen gas until normal pressure; dropwise adding propyleneoxide, carrying out sampling until a sample is qualified, and then, carrying out cooling; dropwise adding trans-butene diacid, bubbling nitrogen gas after dropwise adding is completed, carrying out heating up, and carrying out heat preservation; dropwise adding para-toluenesulfonic acid, carrying out stirring, carrying out vacuumizing, carrying out stirring while controlling a temperature, continuing to dropwise add monoethanolamine, and carrying out stirring; and carrying out cooling, pumping off a solvent, and carrying out stirring, thereby completing product synthesis. The method has the advantages that the demulsifying agent prepared by the method solves the problem of a stubborn emulsion of a natural gas well production site, and the relative recovery rate of condensate oil can reach60% or more; and the oil content of sewage resulting from the treatment of natural gas produced fluid can be greatly lowered, the pollution to environments caused by sewage emission is reduced, and extra worries in the further development of condensate oil and gas are avoided.

Description

technical field [0001] The invention relates to the field of chemical treatment agents for natural gas production liquids, in particular to a preparation method for condensate oil-water emulsion demulsifiers. Background technique [0002] Exploration practice in the past ten years has shown that in some oil and gas basins in my country, many natural gas reservoirs are associated with a certain amount of condensate oil (or light oil). It is a gas reservoir in which the associated liquid hydrocarbons in natural gas are in a supercritical state under high pressure and high temperature conditions in the formation. When it is mined to the ground, due to the decrease in pressure and temperature, the liquid product condensed by reverse phase condensation is called condensate. , the main component is a mixture of C5 to C8 hydrocarbons, and contains a small amount of hydrocarbons larger than C8 and impurities such as sulfur dioxide, thiophenes, mercaptans, sulfides and polysulfides, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G33/04C08G8/10C08G65/26C08G65/332
CPCC08G8/10C08G65/2612C08G65/3322C10G33/04
Inventor 谷之辉崔仕章王黎明高瑞美于长禄张向红
Owner SHANDONG DESHI CHEM IND CO LTD
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