Preparation method of high-flash demulsifier

A high-flash point demulsifier and high-pressure reactor technology, applied in the direction of dehydration/demulsification by chemical methods, can solve problems such as poor hydrophilicity, production, storage, transportation and on-site safety risks of demulsifiers, and achieve good low-temperature demulsification. The effects of milk properties, good hydrophilic and lipophilic properties, and strong surface activity

Active Publication Date: 2012-05-02
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. Poor hydrophilicity
[0005] The above factors affect the use effect of the demulsifier to a certain extent, and at the same time bring safety risks to the production, storage, transportation and field use of the demulsifier

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0019] (1) Preparation of intermediates: add 0.2-0.5 parts by weight of catalyst potassium hydroxide and 1-2 parts by weight of glycerin as an initiator in a stainless steel autoclave, vacuumize and fill with nitrogen at 20-30°C Replace the air in the kettle three times each time, raise the temperature to 110-130°C, feed 97.5-110.5 parts by weight of propylene oxide, and control the reaction pressure to 0.3-0.5 MPa, and then reduce the pressure after 2-2.5 hours until the pressure does not change anymore , to obtain an intermediate;

[0020] (2) Preparation of ethylene oxide and propylene oxide block copolyether: add 0.2 to 0.3 parts by weight of catalyst potassium hydroxide and 15 to 20 parts by weight of potassium hydroxide prepared in step (1) into a stainless steel autoclave The intermediate was evacuated and filled with nitrogen three times respectively, dehydrated in vacuum at -0.15Mpa pressure and 100°C for 2 to 3 hours, introduced 79.7 parts by weight of ethylene oxide...

Embodiment 1

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

[0027] (1) Preparation of intermediates: Add 0.2 parts by weight of catalyst potassium hydroxide and 1 part by weight of initiator glycerin into a stainless steel autoclave, vacuumize and fill with nitrogen three times at 20°C to replace the inside of the autoclave The air was heated up to 110°C, 97.5 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 no longer changed, and the intermediate was obtained;

[0028] (2), preparation of ethylene oxide and propylene oxide block copolyether: add 0.23 parts by weight of catalyst potassium hydroxide and 15 parts by weight of the intermediate prepared by step (1) into the stainless steel autoclave, pump Vacuum and nitrogen filling three times respectively, vacuum dehydration at -0.15Mpa pressure, 100°C temperature for 2 hours, feed 79.7 parts by wei...

Embodiment 2

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

[0034] (1) Preparation of intermediates: Add 0.35 parts by weight of catalyst potassium hydroxide and 1.5 parts by weight of initiator glycerin into a stainless steel autoclave, vacuumize and fill with nitrogen three times at 25°C to replace the inside of the autoclave The air was heated up to 120°C, 104 parts by weight of propylene oxide was introduced, and the reaction pressure was controlled to be 0.4MPa. After 2.25 hours, the pressure was reduced until the pressure did not change, and the intermediate was obtained;

[0035] (2), preparation of ethylene oxide and propylene oxide block copolyether: add 0.25 parts by weight of catalyst potassium hydroxide and 17.5 parts by weight of the intermediate prepared by step (1) into the stainless steel autoclave, pump Vacuum and nitrogen filling three times respectively, vacuum dehydration at -0.15Mpa pressure, 100°C temperature for 2.5 hours, feed 79.7 parts by ...

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Abstract

The invention relates to a preparation method of a high-flash demulsifier. Currently, an ethylene oxide-propylene oxide block copolymer is mainly used as an effective component of a demulsifier in the crude oil gathering and transporting process in the oil field. Thus, the present demulsifier has low flash point and poor hydrophilicity, the application effect of the demulsifier is influenced, andsimultaneously the production, storage, transportation and onsite application of the demulsifier have safety risks. The high-flash demulsifier provided by the invention is prepared by steps of: preparation of an intermediate, preparation of an ethylene oxide-propylene oxide block copolyether, preparation of alkylbenzene sulfonate and preparation of a high-flash demulsifier. The flash point of thedemulsifier prepared by the invention is greater than 30 DEG C. The demulsifier has strong surface activity, good lypohydrophilic character and good low-temperature demulsification performance. When the temperature is less than 30 DEG C, emulsified crude oil can be dehydrated. The demulsifier provided by the invention can be applied in the field of settling tank crude oil dehydration treatment.

Description

technical field [0001] The invention relates to a preparation method of a high-flash point demulsifier used in the crude oil gathering and transportation process, specifically with ethylene oxide, propylene oxide block copolyether, modified alkylbenzene sulfonate, organic solvent, Mutual solvent and water are used as raw materials to prepare a high flash point 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. Low flash point. Most of the demulsifiers used in oil fields have a flash point lower than 20°C, which cannot meet the requirement of a flash point greater than 20°C specified in SY / T 5280-2000 "General Technical Conditions for Crude O...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G33/04C08G65/28
Inventor 杜彪杨海燕万华杨继刚胡军沈燕鸿王妍琼王伟波潘谦宏翁华涛章文荣叶智张强陈彦云刘晨辉
Owner 西安长庆化工集团有限公司
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