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Preparation method for polymer-containing crude oil demulsifier

A crude oil demulsifier and polymer technology, which is applied in the field of preparation of polymer-containing crude oil demulsifier, can solve the problems of inability to effectively treat polymer-containing crude oil, poor water quality of the extracted sewage, etc., and achieve good performance of polymer-containing emulsified crude oil. , Good hydrophilic and lipophilic properties, strong surface activity effect

Active Publication Date: 2012-01-25
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
[0005] The above factors, to a certain extent, caused conventional demulsifiers to be unable to effectively treat polymer-containing crude oil

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0019] (1) Preparation of intermediates: Add 0.5 parts by weight of catalyst sodium ethoxide and 1.5 parts by weight of initiator polyethylene glycol into a stainless steel autoclave, vacuumize and fill with nitrogen three times at 20-30°C To replace the air in the kettle, raise the temperature to 120°C, feed 98 parts by weight of propylene oxide, and control the reaction pressure to 0.2-0.4MPa, and reduce the pressure after 2 hours until the pressure does not change anymore, to obtain the intermediate;

[0020] (2) Preparation of ethylene oxide and propylene oxide block copolyether: Add 0.3 parts by weight of catalyst sodium ethoxide and 20 parts by weight of the intermediate prepared in step (1) into a stainless steel autoclave, and vacuumize and nitrogen gas three times respectively, feed 79.7 parts by weight of ethylene oxide, control the reaction temperature to 120°C, and the reaction pressure to 0.2-0.4MPa, reduce the pressure after 2 hours until the pressure no longer ch...

Embodiment 1

[0026] The present invention is realized through the following steps:

[0027] (1) Preparation of intermediates: Add 0.5 parts by weight of catalyst sodium ethoxide and 1.5 parts by weight of initiator polyethylene glycol into a stainless steel autoclave, vacuumize and fill with nitrogen three times at 20°C to replace The air in the kettle is heated up to 120°C, 98 parts by weight of propylene oxide is introduced, and the reaction pressure is controlled to be 0.2MPa, and the pressure is reduced after 2 hours until the pressure does not change anymore, and the intermediate is obtained;

[0028] (2) Preparation of ethylene oxide and propylene oxide block copolyether: Add 0.3 parts by weight of catalyst sodium ethoxide and 20 parts by weight of the intermediate prepared in step (1) into a stainless steel autoclave, and vacuumize and nitrogen gas three times each, feed 79.7 parts by weight of ethylene oxide, control the reaction temperature to 120°C, and the reaction pressure to 0...

Embodiment 2

[0033] The present invention is realized through the following steps:

[0034] (1) Preparation of intermediates: Add 0.5 parts by weight of catalyst sodium ethoxide and 1.5 parts by weight of initiator polyethylene glycol into a stainless steel autoclave, vacuumize and fill with nitrogen three times at 25°C to replace The air in the kettle was heated up to 120°C, 98 parts by weight of propylene oxide was introduced, and the reaction pressure was controlled to be 0.3MPa, and after 2 hours, the pressure was reduced until the pressure did not change to obtain the intermediate;

[0035] (2) Preparation of ethylene oxide and propylene oxide block copolyether: Add 0.3 parts by weight of catalyst sodium ethoxide and 20 parts by weight of the intermediate prepared in step (1) into a stainless steel autoclave, and vacuumize and nitrogen gas three times respectively, feed 79.7 parts by weight of ethylene oxide, control the reaction temperature to 120°C, and the reaction pressure to 0.3M...

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PUM

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Abstract

The invention relates to a preparation method for a polymer-containing crude oil demulsifier. At present, the demulsifier has a poor demulsification effect on the polymer-containing crude oil demulsifier and poor water quality of removed sewage during crude oil gathering and delivery in an oil field. The method comprises the following steps of: preparing an intermediate; preparing ethylene oxide or propylene oxide block copolyether; preparing alkyl benzene sulfonate; and preparing the polymer-containing crude oil demulsifier. The polymer-containing crude oil demulsifier prepared by the invention has high surface activity, superior hydrophilic and lipophilic performances and performance of processing polymer-containing emulsified crude oil, and can be used for processing the polymer-containing emulsified crude oil in a crude oil overflow and sedimentation system.

Description

technical field [0001] The invention relates to a preparation method of a polymer-containing crude oil demulsifier used in the crude oil gathering and transportation process. Solvent, mutual solvent and water are used as raw materials to prepare a polymer-containing crude oil demulsifier. technical background [0002] At present, the demulsifiers in the process of crude oil gathering and transportation in oil fields mainly use ethylene oxide and propylene oxide block copolymers as effective components, which are obtained after dilution with organic solvents such as toluene, xylene, methanol, etc., which generally have the following disadvantages: [0003] 1. Poor demulsification effect on polymer-containing crude oil. Most of the demulsifiers used in oil fields are aimed at the polymer-free crude oil emulsion produced from oil wells, and have poor dehydration effect on polymer-containing crude oil. With the continuous implementation of tertiary oil recovery measures, the p...

Claims

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Application Information

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IPC IPC(8): C10G33/04C08G65/28
Inventor 杜彪杨海燕万华杨继刚王妍琼胡军王伟波潘谦宏翁华涛章文荣吕俊华豆亚娟李鹏陈彦云刘晨辉
Owner 西安长庆化工集团有限公司
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