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Demulsifier and preparation method thereof

A demulsifier and polyether technology, applied in the field of demulsifier and its preparation, can solve the problems of unsatisfactory dehydration effect of demulsifier's flocculation ability and coalescence ability, poor low-temperature dehydration effect of crude oil, poor adaptability of crude oil and oil products, etc. The effect of industrialized promotion of production, fast oil-water separation rate, and wide application range

Active Publication Date: 2021-11-23
胜利油田海发环保化工有限责任公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the flocculation ability, coalescence ability and dehydration effect of the prepared demulsifier are not ideal, and the adaptability to crude oil is poor; the demulsifiers used in various oil fields are developed for different crude oil physical properties, and they are highly targeted. Low temperature dehydration effect is poor, not applicable, the overall effect of demulsification is poor

Method used

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  • Demulsifier and preparation method thereof

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Effect test

Embodiment 1

[0047] The demulsifier described in this embodiment 1, in terms of mass percentage, consists of 22% silicone oil modified phenolic amine resin polyether demulsifier, 35% acrylic modified triblock phenolic amine resin polyether demulsifier, 6% Ionic liquid, 0.5% myristamidopropyl hydroxypropyl sulfobetaine, 14% diethylene glycol mono-n-butyl ether and the balance water.

[0048] in:

[0049] The ionic liquid is bromo-1-octyl-2,3-dimethylimidazole.

[0050] Bromo-1-octyl-2,3-dimethylimidazole is added as an ionic liquid, which can quickly reach the oil-water interface and reduce the tension of the oil-water interface.

[0051] The preparation method of described silicone oil modified phenolic resin polyether demulsifier, consists of the following steps:

[0052] (1) Add phenolic amine resin and alkali catalyst to the autoclave, stir and heat up to 95°C, vacuumize and replace with nitrogen, control the pressure at -0.15MPa, continue to heat up to 127°C, feed propylene oxide for...

Embodiment 2

[0081] The demulsifier described in this embodiment 2, in terms of mass percentage, consists of 20% silicone oil modified phenolic amine resin polyether demulsifier, 33% acrylic modified triblock phenolic amine resin polyether demulsifier, 5% Ionic liquid, 0.6% myristamidopropyl hydroxypropyl sulfobetaine, 12% diethylene glycol mono-n-butyl ether and the balance water.

[0082] in:

[0083] The ionic liquid is bromo-1-octyl-2,3-dimethylimidazole.

[0084] Bromo-1-octyl-2,3-dimethylimidazole is added as an ionic liquid, which can quickly reach the oil-water interface and reduce the tension of the oil-water interface.

[0085] The preparation method of described silicone oil modified phenolic resin polyether demulsifier, consists of the following steps:

[0086] (1) Add phenolic amine resin and alkali catalyst to the autoclave, stir and raise the temperature to 90°C, vacuumize and replace with nitrogen, control the pressure at -0.20MPa, continue to heat up to 125°C, feed propy...

Embodiment 3

[0115] The demulsifier described in this embodiment 3, in mass percentage, is broken by 25% silicone oil modified phenolic amine resin polyether demulsifier, 30% acrylic acid modified three-block phenolic amine resin polyether Emulsion, 8% ionic liquid, 0.7% myristamidopropyl hydroxypropyl sulfobetaine, 15% diethylene glycol mono-n-butyl ether and the balance water.

[0116] in:

[0117] The ionic liquid is bromo-1-octyl-2,3-dimethylimidazole.

[0118] Bromo-1-octyl-2,3-dimethylimidazole is added as an ionic liquid, which can quickly reach the oil-water interface and reduce the tension of the oil-water interface.

[0119] The preparation method of described silicone oil modified phenolic resin polyether demulsifier, consists of the following steps:

[0120] (1) Add phenolic amine resin and alkali catalyst to the autoclave, stir and heat up to 92°C, vacuumize and replace with nitrogen, control the pressure at -0.20MPa, continue to heat up to 127°C, feed propylene oxide for re...

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Abstract

The invention belongs to the technical field of demulsifiers, and particularly relates to a demulsifier and a preparation method thereof. The demulsifier disclosed by the invention is prepared from the following components in percentage by mass: 20 to 25 percent of a silicone oil modified phenol-amine resin polyether demulsifier, 30 to 35 percent of a acrylic acid modified triblock phenol-amine resin polyether demulsifier, 5 to 8 percent of ionic liquid, 0.5 to 0.7 percent of tetradecanamide propyl hydroxypropyl sulfobetaine and 12 to 15 percent of diethylene glycol monobutyl ether, with the balance being water. According to the demulsifier disclosed by the invention, bromo-1-octyl-2,3-dimethylimidazole is added as the ionic liquid, so the tension of an oil-water interface is reduced; and the silicone oil modified phenol-amine resin polyether demulsifier and the acrylic acid modified triblock phenol-amine resin polyether demulsifier are taken as main materials, the ionic liquid is taken as an auxiliary material, and the raw materials are compounded for use, so the prepared demulsifier has a synergistic effect, is used for crude oil dehydration, and has the characteristics of small dosage, low use temperature and high dehydration speed.

Description

technical field [0001] The invention belongs to the technical field of demulsifiers, and in particular relates to a demulsifier and a preparation method thereof. Background technique [0002] When crude oil is extracted, more than 80% of it will contain water to varying degrees, and some crude oil has a water content as high as 90%. If the crude oil is not dehydrated in time, it will increase the load on pumps, pipelines and storage tanks, causing corrosion and scaling on the metal surface; The oil contained in the discharged water will also cause environmental pollution and waste of crude oil. However, the addition of a large amount of chemical agents in the oil recovery process has caused certain difficulties in the demulsification and dehydration of crude oil, which makes the emulsification state of the produced fluid more diverse. The phase state of the produced crude oil is not limited to W / O type, but also O / W type, W / O and O / W two kinds of emulsions are synthesized ...

Claims

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Application Information

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IPC IPC(8): C10G33/04
CPCC10G33/04
Inventor 艾明刚刘明哲程昊赵彬王杰龙
Owner 胜利油田海发环保化工有限责任公司
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