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Synthesis method of cationic-polymer-modified crude oil demulsifier

A technology of cationic polymer and synthesis method, applied in the field of chemicals used in the petroleum industry, can solve the problems of single functional group, poor water solubility, poor adaptability, etc., and achieve the effects of less dosage, clear water removal, and fast water output rate.

Active Publication Date: 2015-05-13
JURONG NINGWU CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 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 preparation method of cationic modified demulsifier

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A kind of synthetic method of cationic polymer modified crude oil demulsification, as follows:

[0017] 1) Add 50 grams of 95% ethanol, and the solvent at this time is 95% ethanol, into the reaction flask with stirring, dropping device and water separator, at 75 o Under C stirring conditions, add 12 grams of 60% dimethyl diallyl ammonium chloride aqueous solution, 8 grams of acrylic acid and 0.1 gram of initiator ammonium persulfate, and the whole polymerization process is controlled within 1 hour, and the insulation reaction is continued for 1 hour after the reaction finishes. hours, and then the solvent was distilled off under reduced pressure to obtain an intermediate product.

[0018] 2) Add 50 grams of industrial polyether (polyether demulsifier AE0604, product of Jurong Ningwu High-tech Development Co., Ltd.) and 25 grams of toluene to the above intermediate product. The solvent at this time is toluene. After stirring evenly, add 0.3 grams p-toluenesulfonic acid,...

Embodiment 2

[0020] A kind of synthetic method of cationic polymer modified crude oil demulsification, as follows:

[0021] 1) Add 80 grams of 95% ethanol into the reaction flask with stirring, dripping device and water separator, at 80 o Under C stirring conditions, add 10 grams of 60% dimethyl diallyl ammonium chloride aqueous solution, 20 grams of acrylic acid and 0.2 grams of initiator ammonium persulfate, the whole polymerization process is controlled in 2 hours, after the reaction finishes, continue the insulation reaction for 1 hours, and then the solvent was distilled off under reduced pressure to obtain an intermediate product.

[0022] 2) Add 50 grams of industrial polyether (polyether demulsifier BP5921, product of Jurong Ningwu High-tech Development Co., Ltd.) and 25 grams of toluene to the above intermediate product, stir well, add 0.5 grams of p-toluenesulfonic acid, and heat up to 130 o C continued to stir and react for 4 hours to obtain a crude product. The solvent is di...

Embodiment 3

[0024] A kind of synthetic method of cationic polymer modified crude oil demulsification, as follows:

[0025] 1) Add 130 grams of 95% ethanol into the reaction flask with stirring, dropping device and water separator, at 85 o Under stirring condition, add 30 grams of 60% dimethyl diallyl ammonium chloride aqueous solution, 20 grams of acrylic acid and 0.3 grams of initiator ammonium persulfate, the whole polymerization process is controlled in 3 hours, after the reaction finishes, continue the insulation reaction for 1 hours, and then the solvent was distilled off under reduced pressure to obtain an intermediate product.

[0026] 2) Add 200 grams of industrial polyether (polyether demulsifier AE1910, product of Jurong Ningwu High-tech Development Co., Ltd.) and 100 grams of toluene to the above intermediate product, stir well, add 1 gram of p-toluenesulfonic acid, and heat up to 140 o C continued to stir and react for 3 hours to obtain a crude product. The solvent is disti...

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PUM

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Abstract

The invention discloses a synthesis method of cationic polymer modified crude oil demulsifier. Cationic vinyl monomers and acrylic acid and other substances containing functional groups are used as raw materials to react to synthesize cationic copolymers under the action of an initiator, and then esterify the obtained product with industrial polyether under the action of an esterification catalyst Reacting to prepare cationic polymer modified crude oil demulsifier. The raw material weight of the demulsifier is 100%, including 50-90% of industrial polyether, 2-20% of cationic vinyl monomer, and 5-35% of acrylic acid. The added amount of the initiator is 0.1-5% of the total weight of all the vinyl monomers; the added amount of the esterification catalyst is 0.3-8% of the weight of the acrylic acid. The invention can strongly interact with some negatively charged surfaces of crude oil to realize the purpose of oil-water separation. The demulsifier has the advantages of less dosage, fast water effluent, clear color of demulsified water and wide application range.

Description

technical field [0001] The invention belongs to the field of chemicals used in the petroleum industry, and relates to a synthesis method of a novel crude oil demulsifier, in particular to a synthesis method of a cationic polymer modified crude oil demulsifier suitable for demulsification and dehydration of crude oil emulsion. Background technique [0002] Demulsification and dehydration of crude oil emulsion is an important link in the process of oil production and gathering. Demulsifier is an indispensable chemical additive in all oil fields, and it undertakes the task of demulsification and dehydration of emulsified crude oil. With the continuous exploitation of crude oil and the continuous development and application of oil recovery technology, the crude oil emulsion has become more stable. Most of the crude oil produced in the oil field is exploited in the form of oil-water emulsion, and the water content of crude oil increases year by year, which aggravates the The tas...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G33/04C08G81/02C08F226/02C08F220/06
Inventor 倪良郦晨薇应珏王蕾应军霍鹏伟翟洪金郑磊
Owner JURONG NINGWU CHEM