Dialdehyde extender chain type demulsifier and preparation method thereof

A technology of polyether demulsifier and aldehyde chain-extended type, which is applied in the field of binary aldehyde chain-extended polyether demulsifier and its preparation, can solve the problems of insufficient broad-spectrum adaptability and reduced water solubility, and achieve production cost Low, fast dehydration rate, simple synthesis process

Inactive Publication Date: 2013-12-04
JIANGSU UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the demulsification effect of this kind of demulsifier has been improved to a certain extent, its water solubility has decreased, and its broad-spectrum adaptability still cannot meet the requirements of oilfield production.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A binary aldehyde chain extension type polyether demulsifier and a synthesis method thereof, the preparation method is as follows:

[0016] Add 100 grams of industrial polyether (AE31, product of Jurong Ningwu High-tech Development Co., Ltd.) and 40 grams of 95% ethanol in a 250ml flask equipped with agitator, condenser, and constant pressure dropping funnel, and use 36% hydrochloric acid The solution is adjusted to pH=3.0, when the reaction temperature reaches 100 o At C, slowly add 5 grams of glyoxal solution dropwise with a constant pressure dropping funnel, react for 3 hours under stirring, then neutralize with 30% sodium hydroxide solution to pH=7.0, and finally remove the solvent by distillation under reduced pressure. A binary aldehyde chain-extended polyether demulsifier was obtained.

Embodiment 2

[0018] A binary aldehyde chain extension type polyether demulsifier and a synthesis method thereof, the preparation method is as follows:

[0019] Add 100 grams of industrial polyether (AE31, product of Jurong Ningwu High-tech Development Co., Ltd.) and 20 grams of 95% ethanol in a 250ml flask equipped with agitator, condenser, and constant pressure dropping funnel, and use 36% hydrochloric acid The solution is adjusted to pH=4.0, when the reaction temperature reaches 90 o At C, slowly add 2 grams of glyoxal solution dropwise with a constant pressure dropping funnel, react for 4 hours under stirring, then neutralize with 30% sodium hydroxide solution to pH=7.0, and finally remove the solvent by distillation under reduced pressure. A binary aldehyde chain-extended polyether demulsifier was obtained.

Embodiment 3

[0021] A binary aldehyde chain extension type polyether demulsifier and a synthesis method thereof, the preparation method is as follows:

[0022] Add 100 grams of industrial polyether (F3111, product of Jurong Ningwu High-tech Development Co., Ltd.) and 40 grams of 95% ethanol in a 250ml flask equipped with agitator, condenser, and constant pressure dropping funnel, and use 36% hydrochloric acid The solution is adjusted to pH=3.0, when the reaction temperature reaches 100 o At C, slowly add 5 grams of glyoxal solution dropwise with a constant pressure dropping funnel, react for 3 hours under stirring, then neutralize with 30% sodium hydroxide solution to pH=7.0, and finally remove the solvent by distillation under reduced pressure. A binary aldehyde chain-extended polyether demulsifier was obtained.

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Abstract

The invention discloses a dialdehyde extender chain type demulsifier and a preparation method thereof. The raw materials for preparing the demulsifier comprises, by weight, 50-90% industrial polyether, 0.5-15% dialdehyde, and good solvents of industrial polyether and dialdehyde. Moreover, the raw materials comprise acid catalyst, and the utilization amount of the acid catalyst is 0.05-2% that of the industrial polyether. According to the preparation method, dialdehyde or industrial polyether is reacted with a plurality kinds of mixtures under the action of acid catalyst of 80-100 oC, then, sodium hydroxide solution is added for neutralization, and finally solvents are removed through reduced pressure distillation, so that the dialdehyde extender chain type demulsifier is obtained. The demulsifier obtained through the method is simple in synthetic technology, small in utilization amount and low in demulsification temperature.

Description

technical field [0001] The invention relates to a demulsifier for crude oil emulsion, in particular to a binary aldehyde chain-extended polyether demulsifier and a preparation method thereof. Background technique [0002] 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 task of demulsification and dehydration of emulsified crude oil is realized. The demulsifier single agent currently used in China is basically non-ionic polyoxyethylene polyoxypropylene ether demulsifier. The broad-spectrum adaptability of the oil is poor. Although a variety of polyether demulsifiers can improve the demulsification effect after compounding, such as the demulsifier described in the patent applicati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G33/04C08G65/00
Inventor 倪良郦晨薇应珏霍鹏伟翟洪金王蕾于文超徐华丽
Owner JIANGSU UNIV
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