Demulsifier and its preparation method

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

Active Publication Date: 2022-02-08
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 its preparation method

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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 Example 3, in terms of mass percentage, is composed of 25% silicone oil modified phenolamine resin polyether demulsifier, 30% acrylic modified triblock phenolamine resin polyether demulsifier Emulsion, 8% ionic liquid, 0.7% tetradecamidopropyl hydroxypropyl sulfobetaine, 15% diethylene glycol mono-n-butyl ether and 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 the silicone oil-modified phenolamine resin polyether demulsifier comprises the following steps:

[0120] (1) Add the phenolamine resin and alkali catalyst into 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 r...

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Abstract

The invention belongs to the technical field of demulsifiers, and in particular relates to a demulsifier and a preparation method thereof. The demulsifier of the present invention, in terms of mass percentage, consists of 20-25% silicone oil modified phenolic amine resin polyether demulsifier, 30-35% acrylic acid modified three-block phenolic amine resin polyether demulsifier, 5 ‑8% ionic liquid, 0.5‑0.7% myristamidopropyl hydroxypropyl sultaine, 12‑15% diethylene glycol monobutyl ether and the balance water. In the demulsifier described in the present invention, bromo-1-octyl-2,3-dimethylimidazole is added as an ionic liquid to reduce the tension of the oil-water interface; the polyether demulsifier modified with silicone oil and acrylic acid modified Tri-block phenolic amine resin polyether demulsifier is the main demulsifier, supplemented by ionic liquids. The above-mentioned raw materials are used in combination, which has a synergistic effect. It is used for crude oil dehydration, and has the characteristics of less dosage, low use temperature and fast dehydration speed. .

Description

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

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G33/04
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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