Emulsion breaker for polymer and surface active agent crude oil and preparation method thereof

A technology of surfactant and demulsifier, which is applied in the field of demulsifier and its preparation for crude oil containing polymers and surfactants. It can solve the problems of high content of suspended solids, poor water quality of extracted sewage, and poor water quality of sewage, and achieve strong The effect of surface activity and good hydrophilic and lipophilic properties

Inactive Publication Date: 2016-01-27
西安长庆化工集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 2. The water quality of the discharged sewage is poor
Most of the demulsifiers used in oilfields are poor in treating crude oil containing polymers and surfactants, the water quality of the extracted sewage is poor, the content of suspended solids is high, and the sewage has high oil content
[0005] The above factors, to a certain extent, caused conventional demulsifiers to be unable to effectively treat crude oil containing polymers and surfactants.

Method used

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  • Emulsion breaker for polymer and surface active agent crude oil and preparation method thereof
  • Emulsion breaker for polymer and surface active agent crude oil and preparation method thereof
  • Emulsion breaker for polymer and surface active agent crude oil and preparation method thereof

Examples

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Embodiment 1

[0032] A demulsifier for polymer and surfactant crude oil, the demulsifier is composed of the following parts by weight:

[0033] Ethylene oxide: 40-43.5 parts;

[0034] Ethylene oxide-propylene oxide block copolyether: 20 to 30 parts;

[0035] Alkylbenzenesulfonate: 25-30 parts;

[0036] Mutual solvent: 2.5 to 3.0 parts;

[0037] Ethylene glycol: 10-15 parts;

[0038] Water: 9-12 parts.

[0039] The preparation method for the demulsifier of polymer and surfactant crude oil, comprises the following steps:

[0040] 1), the preparation of intermediates:

[0041] Add 0.2 to 0.5 parts by weight of catalyst sodium ethylate and 0.5 to 0.8 parts by weight of starter pentaethylenehexamine in a stainless steel high-pressure reaction kettle, and vacuumize and fill with nitrogen three times at 20 to 30°C to replace the Air, heating up to 120°C, feeding 98.5 to 100.5 parts by weight of propylene oxide, and controlling the reaction pressure to 0.2 to 0.4 MPa, and reducing the pressur...

Embodiment 2

[0052] This embodiment specifically provides a method for preparing a demulsifier for polymer and surfactant crude oil, specifically according to the following steps:

[0053] 1), the preparation of intermediates:

[0054] Add 0.2 parts by weight of catalyst sodium ethylate and 0.5 parts by weight of initiator pentaethylenehexamine in a stainless steel high-pressure reactor, vacuumize and fill with nitrogen three times at 20°C to replace the air in the kettle, and heat up to 120°C , feed 98.5 parts by weight of propylene oxide, and control the reaction pressure to 0.2MPa, after 2 hours, reduce the pressure until the pressure does not change anymore, to obtain the intermediate.

[0055] 2), Preparation of ethylene oxide-propylene oxide block copolyether:

[0056] Add 0.3 parts by weight of catalyst sodium ethylate and 20 parts by weight of the intermediate prepared by step 1) in the stainless steel autoclave, vacuumize and fill with nitrogen three times, feed 78.5 parts by weigh...

Embodiment 3

[0064] This embodiment specifically provides a method for preparing a demulsifier for polymer and surfactant crude oil, specifically according to the following steps:

[0065] 1), the preparation of intermediates:

[0066] Add 0.3 parts by weight of catalyst sodium ethylate and 0.6 parts by weight of starter pentaethylenehexamine in a stainless steel high-pressure reactor, vacuumize and fill with nitrogen three times at 25°C to replace the air in the kettle, and heat up to 120°C , feed 99.5 parts by weight of propylene oxide, and control the reaction pressure to 0.3MPa, after 2 hours, reduce the pressure until the pressure no longer changes, and obtain the intermediate.

[0067] 2), Preparation of ethylene oxide-propylene oxide block copolyether:

[0068] Add 0.4 parts by weight of catalyst sodium ethylate and 22 parts by weight of the intermediate prepared by step 1) in the stainless steel autoclave, vacuumize and fill with nitrogen three times, feed 80 parts by weight of et...

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Abstract

The invention provides emulsion breaker for a polymer and surface active agent crude oil. The emulsion breaker is prepared from the following components in parts by weight: 40 to 43.5 parts of ethylene oxide, 20 to 30 parts of ethylene oxide-propylene epoxide block co-polymer ether, 25 to 30 parts of alkylbenzene sulfonate, 2.5 to 3.0 parts of mutual solvent, 10 to 15 parts of glycol and 9 to 12 parts of water. The emulsion breaker has high surface activity, better hydrophilic and oleophylic performance and performance for processing the polymer-containing emulsified crude oil and can be used for treating the polymer-containing emulsified crude oil in a crude oil overflow settlement system.

Description

technical field [0001] The invention relates to a crude oil demulsifier, in particular to a demulsifier for crude oil containing polymers and surfactants and a preparation method thereof. Background technique [0002] At present, the demulsifiers used in oilfield crude oil gathering and transportation mainly use ethylene oxide and propylene oxide block copolymers as effective components, which are diluted with organic solvents such as toluene, xylene, and methanol, and generally have the following disadvantages: [0003] 1. Poor demulsification effect on crude oil containing polymers and surfactants. Most of the demulsifiers used in oil fields are aimed at the crude oil emulsion produced from oil wells without polymers and surfactants, and have poor dehydration effect on crude oil containing polymers and surfactants. With the continuous implementation of enhanced oil recovery measures, the content of polymers and surfactants in crude oil increases, and the dehydration of cr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/06C08G65/08C08L71/02C10G33/04
Inventor 王伟波黄依理万华任永宏潘文启朱趁安沈燕鸿章文荣翁华涛董小丽高美芝
Owner 西安长庆化工集团有限公司
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