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Polyion-liquid-modified crude oil demulsifier

A technology of polyionic liquid and demulsifier, which is applied in the field of polyionic liquid modified crude oil demulsifier, which can solve the problems of poor adaptability, single functional group, poor water solubility, etc., and achieve fast water output rate, less dosage and wide application range Effect

Inactive Publication Date: 2014-01-01
JIANGSU UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the deficiencies of poor water solubility, single functional group and poor adaptability of polyacrylic acid modified polyether demulsifier, the purpose of the present invention is to provide a cationic modified demulsifier

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A polyionic liquid modified crude oil demulsifier, the synthesis method is as follows:

[0018] 1) Add 150 grams of ethanol with a concentration of 95%, and the solvent at this time is ethanol with a concentration of 95%; add it to a reaction bottle with a stirring, dropping device and a condenser, and control the temperature at 75 o C, under stirring conditions, add 50 grams of 1-allyl-3-methylimidazolium chloride ionic liquid, 20 grams of acrylic acid and 0.8 grams of ammonium persulfate, the entire polymerization process is controlled within 1 hour, and continue to keep warm after the reaction is completed After reacting for 1 hour, the solvent was distilled off under reduced pressure to obtain an intermediate product.

[0019] 2) Add 200 grams of industrial polyether (polyether demulsifier AE31, product of Jurong Ningwu High-tech Development Co., Ltd.) and 100 grams of toluene to the above intermediate product. The solvent at this time is toluene. After stirring ev...

Embodiment 2

[0021] A polyionic liquid modified crude oil demulsifier, the synthesis method is as follows:

[0022] 1) Add 150 grams of ethanol with a concentration of 95% to the reaction flask with stirring, dropping device and condenser, and control the temperature at 85 o C, under stirring conditions, add 35 grams of 1-allyl-3-methylimidazolium chloride ionic liquid, 35 grams of acrylic acid and 1 gram of ammonium persulfate, the entire polymerization process is controlled within 2 hours, and the heat preservation is continued after the reaction is completed After reacting for 1 hour, the solvent was distilled off under reduced pressure to obtain an intermediate product.

[0023] 2) Add 180 grams of industrial polyether (polyether demulsifier BP5921, product of Jurong Ningwu High-tech Development Co., Ltd.) and 90 grams of toluene to the above intermediate product, stir well, add 0.6 grams of p-toluenesulfonic acid, and heat up to 130 o C, continue to stir and react for 4 hours to ob...

Embodiment 3

[0025] A polyionic liquid modified crude oil demulsification agent synthesis method is as follows:

[0026] 1) Add 210 grams of ethanol with a concentration of 95% into a reaction flask with stirring, dropping device and condenser, and control the temperature at 90 o C, under stirring conditions, add 65 grams of 1-allyl-3-methylimidazolium chloride ionic liquid, 35 grams of acrylic acid and 1.2 grams of ammonium persulfate, the entire polymerization process is controlled within 3 hours, and continue to keep warm after the reaction is completed After reacting for 1 hour, the solvent was distilled off under reduced pressure to obtain an intermediate product.

[0027] 2) Add 200 grams of industrial polyether (polyether demulsifier TA1031, product of Jurong Ningwu High-tech Development Co., Ltd.) and 100 grams of toluene to the above intermediate product, stir well, add 0.5 grams of p-toluenesulfonic acid, and heat up to 140 o C, continue to stir and react for 3 hours to obtain...

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Abstract

The invention discloses a polyion-liquid-modified crude oil demulsifier. The demulsifier is synthesized from the following raw materials in percentage by weight: 50-80% of industrial polyether, 2-30% of acrylic acid and 2-25% of vinyl imidazole ionic liquid monomer. An initiator accounts for 0.2-6 wt% of all the vinyl monomers, and an esterification catalyst accounts for 0.2-5 wt% of the acrylic acid. The demulsifier can have a severe action on some electronegative surfaces of crude oil to achieve the goal of oil-water separation. The demulsifier has the advantages of low consumption, low water outlet rate, clear dehydrated water and width application range.

Description

technical field [0001] The invention belongs to the field of chemicals used in the petroleum industry, and relates to a polyionic liquid modified crude oil demulsifier suitable for demulsifying and dehydrating crude oil emulsion. Background technique [0002] Demulsifier is an indispensable chemical additive in all oil fields, and it undertakes the task of demulsification and dehydration of emulsified crude oil. At present, the exploitation of many oilfields in China has basically entered the stage of tertiary oil recovery. The water content in the produced crude oil is increasing year by year, and various residual chemicals in the crude oil after sewage reinjection make the demulsification and dehydration of emulsified crude oil more complicated and difficult. At present, in terms of chemical types, the demulsifiers studied at home and abroad are mainly non-ionic polyoxyethylene polyoxypropylene block polymers, but the types of initiators are different. The adaptability of...

Claims

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Application Information

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IPC IPC(8): C10G33/04
Inventor 倪良李继琴应珏霍鹏伟应军王蕾翟洪金倪小明
Owner JIANGSU UNIV