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Reversed phase emulsion splitter and preparation method thereof

A reverse phase demulsifier and solvent technology, applied in chemical instruments and methods, dissolution, chemical/physical processes, etc., can solve problems such as poor demulsification ability, increased difficulty in oil-water separation, unsatisfactory performance, etc., and achieve good viscosity reduction , good demulsification performance, good interface participation ability

Inactive Publication Date: 2010-06-02
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] With the promotion and implementation of tertiary oil recovery technology, the proportion of O / W (inverted phase) emulsion in the produced fluid is increasing, and the stability is becoming stronger and stronger, and the difficulty of oil-water separation is increasing. Most of the demulsifiers are W / O type emulsion demulsifiers, O / W type (reverse phase) emulsion demulsifiers (referred to as reverse phase demulsifiers) have limited types, and their performance is not ideal (especially the demulsification ability at low temperature very poor), therefore, the research and development of the O / W type emulsion high-efficiency demulsifier of novel chemical structure is imminent

Method used

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  • Reversed phase emulsion splitter and preparation method thereof
  • Reversed phase emulsion splitter and preparation method thereof
  • Reversed phase emulsion splitter and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Example 1: Preparation of long-chain alkyl 1.0G polyamide-amine (compound represented by formula III):

[0021] Add 27g (0.1mol) octadecylamine, 300g methanol into a 1000ml three-necked flask, reflux at constant temperature under magnetic stirring, bath temperature 60℃, after the raw materials are completely dissolved, slowly add 86g (1mol) methyl acrylate with a constant pressure dropping funnel. ), the dropping rate is one drop per second, and the reaction is under constant temperature stirring for 24 hours to obtain a light yellow transparent liquid. The reaction liquid is static for 12 hours, and white precipitates are precipitated. The filtrate is distilled under reduced pressure with an oil pump to obtain a yellow liquid, which is a 0.5G product; Add 4.3g (0.01mol) of 0.5G product into a three-necked flask, add 100g of methanol, and keep the temperature at 60℃. Add 36.1g (0.6mol) of ethylenediamine slowly with stirring, the dropping rate is one drop per second, and re...

Embodiment 2

[0024] Example 2: Preparation of inverse demulsifier A

[0025] Mix 60g of the compound represented by the formula III (ie long-chain alkyl 1.0G polyamide-amine), 40g of the compound represented by the formula IV (ie long-chain alkylbenzene sulfonic acid) and 100g of methanol to obtain reverse phase Demulsifier A.

Embodiment 3

[0026] Example 3: Preparation of inverse demulsifier B

[0027] Mix 70g of the compound represented by the formula III (ie long-chain alkyl 1.0G polyamide-amine), 30g of the compound represented by the formula IV (ie long-chain alkylbenzene sulfonic acid) and 100g of methanol to obtain reverse phase Demulsifier B.

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Abstract

The invention provides a reversed phase emulsion splitter, which is a product of the combination of long-chain alkyl 1.0G polyamide-imide and long-chain alkyl benzenesulfonic acid in a solvent, wherein the long-chain alkyl 1.0G polyamide-imide is a compound of a general structural formula I and the long-chain alkyl benzenesulfonic acid is a compound of a general structural formula II; in the formula I, R1 is an alkyl of which the main chain has 6 to 28 carbon atoms; and in the formula II, R2 is an alkyl of which the main chain has 6 to 24 carbon atoms. The reversed phase emulsion splitter has high emulsion splitting performance for O / W type emulsions and can be used in the field of the low-temperature dehydration of reversed phase emulsions and the treatment of oil-containing waste water.

Description

Technical field [0001] The invention relates to an inverse demulsifier that can be used in the field of crude oil production and processing and a preparation method thereof. Background technique [0002] During the extraction and processing of crude oil, it emulsifies due to the contact with water and the interaction with the gums, asphaltenes, naphthenic acids, fatty acids, salts, crystalline paraffins, and artificially introduced chemical agents in the crude oil. The phenomenon is very serious, and it is easy to form a stable W / O (water in oil) or O / W (oil in water) emulsion with water. At present, more than 80% of the crude oil produced in the world exists in the form of crude oil emulsion. With the continuous exploitation of crude oil, the oilfield has entered the later stage of exploitation. The adoption of acidification, fracturing, water plugging and the injection of chemical oil displacing agents has caused the water content of the produced fluid to continue to rise, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01F17/22B01F17/00C09K23/22C09K23/00
Inventor 胡长朝王金本周继柱陈慧博史学峰杨惠徐晓慧王毅琳张健向问陶
Owner INST OF CHEM CHINESE ACAD OF SCI
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